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Carrier 39L Air Conditioner User Manual

1. 3 gp 53715 18 10 ONCTIVESNE 3395 HASA SADHAN i NE SONUN 1 x g E 2 pet buie Hbc Sia E IT D nC CC m UN 08 raay 9 NIE 6 03 cry tt mezga f TITWISNU TOL val 2 Hagges xw exw ANDA eg 107 C QYDWISNI 47313 43114483 ASQLOVA qva sWS 9 NVAL T Twy a TAL Ls 7151 17 Nice ape 8 8 Aca qua en l f COE 4 je pm 18 9 4018 102 NYAL 53 GD Ker HE ee 2 QXVWISNI 07313 NYD 21 sane mss i092 8 01311 val ar qu IHA 43114405 53012953 15 E 71022 CEO 93 00 13114403 901293 dW3l Hd ng aee 5 22 QUMLI 7102 MH era 1 3 133 ran AT 1S 62 JHA AST LER 18 5 ene kan 681 H m i m xd Nie y e na igo 241 2 222 208 MEE CANO SALYA LOH 9 241 JUR 20222 TD ASIN E Xm ra I3 Uie r eee 62 S Laus ea
2. Field Wiring Fig 66 Wiring of Return Fan Volume Control with Variable Frequency Drive Pulse Type Meter Fig 67 Monitors power usage which is passed through the Carrier Comfort Network CCN for use by the loadshed module of the Building Supervisor The meter must provide a dry contact signal not exceeding 4 Hz maximum Using a 2 conductor 20 AWG shielded twisted pair conductor cable connect one wire to terminal 35 of the option module and the other wire to terminal 36 Connect the drain wire to the ground lug inside the PIC control box and remove the drain wire and shield on the meter end of the cable Tape to insulate if required PULSE TYPE METER OPTION MODULE T B B SHIELD DRAIN WIRE Field Wiring Fig 67 Pulse Type Meter Wiring ELECTRIC HEATER The electric heater is factory wired and installed and is controlled by the PIC processor and DSIO There is no field wiring or installation required CARRIER COMFORT NETWORK INTERFACE The Carrier Comfort Network CCN communication bus wiring is supplied and installed by the electrical contractor It con sists of shielded 3 conductor cable with drain wire The system elements are connected to the communication bus in a daisy chain arrangement The positive pin of each syst
3. TE To JE PERIOD 1 OCC 00 00 UNO 00 00 UNO 3 00 MON NO MON YES TUE YES COMMENT Define schedule period 1 Start of occupied time For this example first period should start here at midnight so no entry is needed Start of unoccupied time end of period For this example period 1 should end at 3 00 am Period 1 ends at 3 00 am Monday is not flagged for period 1 To put period 1 into effect on Monday Monday must be flagged yes Monday is now flagged for period 1 to be in effect For this example period 1 is to be in effect on Monday only All other days must be checked to be sure that they are flagged no If any day is flagged yes change to no Tuesday is now flagged no for period 1 90 KEYBOARD ENTRY PROGRAMMING PERIOD 2 For this example period 2 is used on Monday and Tuesday s 1 1 Le kel s mmmn s ol Le PERIOD 2 OCC 00 00 OCC 7 00 UNO 00 00 UNO 18 00 MON NO MON YES TUE NO Example 24 Using the Schedule Function cont DISPLAY RESPONSE COMMENT Define scheduling period 2 Start of occupied time Occupied time will start at 7 00 am Start of unoccupied time end of period for this example period 2 should end at 18 00 6 00 pm Period 2 ends at 18 00 6 00 pm Monday is not flagged for period 2 To put period 2 into effect on Monday Monday must be flagged ye
4. Option PSIO Slave Module 1 None 2 Yes Humidifier Control 1 None 2 2 stages spray bar 3 Proportional modulating valve Smoke Control 1 None 2 On FMB1 MXB1 outside air top return air rear 3 On FMB1 MXB1 outside air rear return air top 4 Field supplied for MXB 5 On MXB2 outside air rear return air bottom 6 2 outside air bottom return air rear 7 On outside air bottom return air top 8 On MXB3 outside air top return air bottom Optional Outputs A None B Yes Optional Temperature Inputs A None B Space field installed C Duct field installed D Preheat N O factory installed E Preheat N C factory installed F Preheat 3 way factory installed LEGEND AF Airfoil CV Constant Volume DX Direct Expansion FC Forward Curved FMB Filter Mixing Box MXB Mixing Box N C Normally Closed N O Normally Open Product Integrated Controls VAV Variable Air Volume cv capacity rating is the flow through a valve at 1 psi pressure drop Fig 2 PIC Option Order Number Preheat Valve Sizes 2 or 3 way A None Two way valves Three way valves in in B 1 2 0 4 Q 1 2 2 0 C 1 2 13 R 1 2 40 D 1 2 22 S 3 4 68 E 1 2 3 6 T 1 12 0 F 3 4 50 11 4
5. 3 5 3 E m z gt m z 2 5 3 5 SERVICE CONFIGURATIONS MIXADMPR MPG X MIG X MDG X SMG X SCV X MDP X SMR X SMR X DPSP X DPSP X OAE X RAE X CNTRL X ELECHEAT MPG X MIG X MDG X SMG X SMR X SMR X NTFC NTLO X NPURGE NPMN X NPDL X NPDH X MDP X Description Configuration of mixed air damper Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value Minimum damper position Submaster reference value Submaster reference value forced Damper set point Damper set point forced Outside air enthalpy Return air enthalpy Damper controlled by Configuration of electric heat Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster reference value Submaster reference value forced Configuration of nighttime free cooling NTFC NTFC lockout temperature minimum outside air temperature to operate NTFC Configuration of night purge Night purge duration Night purge low temperature damper position Night purge high temperature damper position Minimum damper position Configuration of constant outside air Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster gain forced OAVP sensor low voltage point OAVP sensor high voltage point OAVP sensor low voltage reference OAVP sensor high voltage reference OAVP se
6. Ca EVE Display no longer flashes 80 2 1 Displays the latest service date the local in Example Using Quick Jest 2 2 service dates displayed at the ONSE COMMENTS Em Factory test of electric heat TEST FUNCTION The test function operates the Quick 5 ELEC HT subfunction of test function Test diagnostic program EHS1 Stage 1 test Displays the status of inputs STG1 TST Pressing ENTR starts the fan test Fan automatically starts There is an 11 second delay while the inlet guide vanes open and the heat stage is enabled When the electric heat stage should be running the display shows EHS ON Test remains on until another key is pressed Pressing the down arrow key advances the system to stage 2 test Any stage may be selected Press the 4 key until the desired stage is displayed then press ENTR to start the test ARSI UP DAP TE AP DECIR A QE ER CIA a a 5 EXIT TST If no other test is desired exit Quick Test Fan shuts off last electric heat 4 Tests the stages of direct expansion DX cool stage shuts off and IGVs Close ing Unit must be configured for DX cooling to access this Test is completed Unit resumes 2 5 TSTCMPL automatic control 3 Tests the electric heaters Unit must be config ured for electric heat to access this subfunction See Example 5 Programming Functions SERVICE FUNCTION
7. Will 1 Term Help Ne Clear the Clamp Set I Term Zero Yes LEGEND Outside Air Constant Outside Air Calculate Submaster Reference Pterm4Dterm4ItermtIntegrator4OAVP Set point Integrator 1 Term 4 Integrator Store Current Error as Previous Error Outside Air Velocity Pressure Variable Air Volume Is Submaster Reference Minimum Sub Ref No Is Submaster Reference Maximum Sub Ref Yes Set Submaster Reference to Minimum Value Yes Set Submaster Reference to Maximum Value Set Master Loop Minimum Clamp Clear Master Loop Clamps Set Master Loop Maximum Clamp Output Submaster Reference 1s Fan On Is Submaster Gain Forced Is OAVP 95 Configured Transducer Maximum Is OAVP gt 5 Configured Transducer Maximum Read Mixed Air Damper Position amp Calculate Gain 1 Gain 600 Maximum Calculate Submaster Gain 1 2 Previous Gain 1 2 Gain Store OAC Submaster Gain Fig 79 Constant Outside Air OAC Control Operation 101 SPACE TEMPERATURE RESET The space tempera ture reset is used to reset the supply air temperature set point upward as the space temperature falls below the Occupied Cooling set point As space temperature falls below the cool ing set point the space temperature is reset upward as a func tion of th
8. FACTORY WIRING FIELD WIRING NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes PROCESSOR MODULE vH Fig 16 Chilled Water Valve Wiring Space Temperature Sensor Fig 18 The space temperature sensor SPT is packaged and shipped inside the fan section It is installed on a building interior wall to mea sure room air temperature The wall plate accommodates both the NEMA National Electrical Manufacturers Association standard and the European 1 4 DIN Deutsche Industrie Norm standard The use of a junction box to accommodate the wiring is recom mended for installation The sensor can be mounted directly on the wall if acceptable by local codes DO NOT mount the sensor in drafty areas such as near heating or air conditioning ducts open windows fans or over heat sources such as baseboard heaters or radiators Sensors mounted in these areas produce inaccurate readings AIRFLOW Fig 17 Duct Static Pressure Probe 40 Avoid corner locations Allow at least 3 ft between the sensor and any corner Airflow near corners tends to be re duced resulting in erratic sensor readings The sensor should be mounted approximately 5 ft up from the floor in the area representing the average temperature Install the sensor as follows 1 Rem
9. gt 4 20mA SUPPLIED SIGNAL Field Wiring Fig 55 Wiring of the Modulating Valve for Analog Output Humidity Control Two Stage Humidification Control Relays Two SPDT relays with silver cadmium contacts are shipped with the unit when 2 stage humidification control is requested See Fig 52 The relays are rated as follows 48 va at 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor The relays must be field installed within a field supplied en closure rated for the application Wire the stage 1 relay as follows Connect the 24 vac coil contacts 1 and 2 to pins 41 and 42 of the option module The stage 1 relay is intended to open a normally closed steam valve and not energize the spray pump See Fig 56 for field wiring of the stage 1 valve and steam pump Wire the stage 2 relay as follows Connect the 24 vac coil contacts 1 and 2 to pins 44 and 45 of the option module The stage 2 relay is intended to open a second normally closed steam valve See Fig 56 for field wiring of the stage 2 valve Duct High Humidity Switch The humidistat is factory sup plied and field installed It is shipped with a template in its own box All wiring must comply with applicable local codes and ordinances Wire the DHH as follows 1 Turn switch on PIC control box to OFF CAUTION
10. The service function allows 5 Takes the unit out of Quick Test the operator to verify or change factory and field configu rations The service subfunctions are listed below See ku M M Table 13 for details Refer to Table 16 for configuration value ranges and defaults NOTE The unit must not be operating during the Quick Test function Set HOA switch to OFF and follow the test pro Use this subfunction to log on before perform cedure Set HOA switch to AUTO only as required during ing any subfunction in Factory Configurations s IH and to log off after completing service subfunctions See To reach a particular test enter its subfunction number Example 6 and then scroll to the desired test by pressing D A test E TET TR dL ina Off xample 6 Logging On and Logging can be terminated by pressing pressing after a test Service Function has started terminates the current test and advances the sys tem to the next test Once in the next step you may start EM RES ONSE COMMENTS the test by pressing advance past it by pressing TO LOG ON back up by pressing 4 When testing is complete exit the mm Ready for password to be by pressing g p Logon Ready Quick Test by pressing 5 and then this MUST LOGGEDON Operator can now use be done to restore the unit software to automatic control service functions If the k
11. FIELD SUPPLIED TIE WRAPS TYP FIELD SUPPLIED3 4 PVC SUPPORTS CAPPED AND SEALED AROUND DUCT PENETRATION 2 EACH 3 8 IN LONG 6 32 MACHINE SCREWS JUNCTION BOX 2 EACH I IN LONG 10 SHEET METAL SCREWS DUCT CONTRACTOR n a PENETRATION WIRING GASKET SEE DETAIL COVER Fig 22 Alternate Mixed Air Temperature Sensor Installation Mount the switch as follows 1 Position mounting template on duct Remove adhesive backing and press template onto outside air duct 2 Drill four mounting holes as indicated on the template 3 Cut out center portion of duct as outlined on template 4 Mount controller to duct using screws provided If no outside air duct is present mount the enthalpy switch on a field supplied and installed plate upstream of the out side air damper Connect the red and blue wires of the enthalpy switch to the PIC control box terminals Refer to Field Wiring Connections section page 52 for further details CONTROL RANGES See Fig 24 for control settings and intermediate settings MOUNTING HOLES THC 4 702 57 076 2 ENTHALPY CONTROLLER CAUTION 2 5 AMP 24 VAC MAX THIS IS NOT A LINE VOLTAGE DEVICE Y CLOSES ON e ENTHALPY INCREASE E D 41 CLOSES ON ENTHALPY B DECREASE L U Fig 23 Enthalpy Switch P N HH57AC076 RELATIVE HUMIDITY 96 SN 2 Re S P lt 2 L 2 35 40 45 50 55 60 65 70
12. Return Velocity Pressure SAT Supply Air Temperature SF Fan Status Relay SFAN Supply Fan SFR Supply Fan Relay SMK Smoke SNB Snubber SP Static Pressure Transducer SPSIO Slave Processor Module Option Module SPT Space Temperature SVP Supply Velocity Pressure SW Switch TB Terminal Block Terminal TEMP Temperature TRAN Transformer VAV Variable Air Volume W With WO Without Marked Wire or Cable Terminal Marked Terminal Unmarked lt gt Terminal Block Splice Factory ZN Splice Field Wiring Factory Wiring Field Control Wiring Field Power J n Option or Accessory Common Potential Wire is in accordance with National Electrical Code NEC For local codes replace original wires with 90 C wire or its equivalent 125 C plenum cable conductor as required 2 3 Replace wires from IGV FLTS MAT SAT OAD RAD and ELEC HT with 4 Input channel numbers and po ints for configuration of the optional analog output temperature control AOTO follow CHANNEL SENSOR DESCRIPTION 1 SAT Supply Air Temperature 2 OAT Outdoor Air Temperature 3 MAT Mixed Air Temperature 6 SPT Space Air Temperature 7 RAT Return Air Temperature 34 TEMP Preheat or Optional Carrier Sensor 5 Reference for wire markers where X represents a numeral X Item number on wiring harness BX Box wire CX Cable KX
13. 5 TERMINALS 6 AND 7 IF ACTUATOR IS FACTORY SUPPLIED IF ACTUATOR IS FIELD SUPPLIED CONNECT TO FIELD SUPPLIED TRANSFORMER Fig 46 Exhaust Damper Actuator Wiring Smoke Control Option or Modulating Dampers 4a For the return air damper RAD actuator connect the positive lead to TB2 terminal 6 Connect the nega tive lead to TB2 terminal 7 b If the actuator is factory supplied connect the actua tor s 24 vac power wires to TB2 terminals 21 and 22 If the actuator is field supplied connect the power wires to a separate isolated 24 vac power source Field Supplied Two Position Damper The factory supplied SPDT relay must be field installed and wired The relay contacts are rated as follows 48 va 24 vac and 25 service factor 125 va at 115 vac and 25 service factor 125 va at 230 vac and 25 service factor The relay provides a set of contacts normally open and nor mally closed using no 6 screw terminals the 24 vdc coil connections are through 4 in quick connects Using a 20 AWG twisted cable connect the relay coil con tacts 1 and 2 to the processor module pins 41 and 42 See Fig 48 To connect the field supplied two position damper actua tor Fig 48 Connect one contact of the actuator to the normally open contact of the relay Connect the common con tact of the relay to one leg of the power source Connect the other contact of the actuator to the other leg of the power source S
14. RETURN FAN 4h MONITORING STATION LEGEND RVP Return Velocity Pressure Transducer SVP Supply Velocity Pressure Transducer Field Tubing NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes OPTION MODULE I lt n 41 54 5 es U jol 13 99 9 ers OO 1 LIT ETT p Jo Fig 64 Fan Volume Control Differential Pressure Transducer P N HK05ZG007 Factory Wiring O GRD OPTION MODULE 1 S lt 4 TO 20 mA SIGNAL FIELD SUPPLIED ACTUATOR INSTALLED ON THE RETURN FAN INLET GUIDE VANES Lao Ibo M 1 H A D c T D NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes Fig 65 Wiring of Return Fan Volume Control with IGVs 63 RETURN FAN VARIABLE FREQ DRIVE lt 20 58 MOTOR CIRCUIT H c c T D
15. Relative Humidity SAT Supply Air Temperature SPT Space Temperature Variable Air Volume is MAT sensor installed and operational Determine maximum clamp using MAT Fig 76 Indoor Air Quality IAQ Control Operation 95 SMOKE CONTROL When the 39L or 39NX unit is equipped with an optional smoke control and a fire system is installed 4 modes are provided to control smoke within areas serviced by the air handling unit Each mode must be energized individually from the approved building fire alarm system and the corresponding alarm is then generated at the local interface device or Building Supervisor The system must include a separate return fan and an ex haust air damper with a 4 to 20 mA actuator The building fire alarm system must provide 4 normally open dry contact closures and a double pole double throw DPDT relay 24 vac coil contacts rated 10 amps at 240 vac for the Fire Shutdown mode Fire Shutdown Mode The fire alarm system must provide a normally open dry contact closure which when activated energizes the Fire Shutdown mode When the Fire Shutdown mode is energized the supply and return fans stop the outside and exhaust air dampers close and the return air dampers open This mode remains in effect as long as the input signal is maintained at the fire system panel An alarm is generated from this input and sent to the Building Supervisor In order for this
16. STATIC PRESSURE CONTROL The static pressure con trol adjusts the inlet guide vanes IGVs or the supply fan motor inverter in a variable air volume system in order to maintain the duct static pressure set point If the supply fan is OFF the IGVs remain closed or the minimum signal is sent to the inverter If the fan is ON the system reads the duct static pressure sensor and computes the static pressure required to satisfy conditions The system compares the duct static pressure to the computed value and calculates the required signal that is output to the IGV actuator or the inverter 100 FAN VOLUME CONTROL Fan volume control adjusts the inlet guide vanes or inverter in a VAV system The return fan IGVs or inverters are modulated to maintain a constant differential cfm value between the supply and return fans in the system If the supply fan is OFF the return fan inlet guide vanes are closed and no signal is sent to the return fan inverter If the supply fan is ON the control reads the supply fan differential pressure transmitter and computes the supply cfm The desired return cfm is calculated by subtracting the dif ferential cfm set point from the calculated supply cfm The return cfm is read and the return fan differential pressure re quired to satisfy conditions is calculated The calculated return fan differential pressure is com pared to the current differential pressure The signal required to satisfy conditi
17. Set point Space Temperature Set Submaster Reference to Maximum Compute I Term Is Master Loop Clamped Will New I Term help Clear Clamp Set I Term To Zero Integrator I Term Previous Integrator Calculate Submaster Reference Pterm Dterm Integrator Start Value Is Space Reset Enabled Is Cool Flag Set Is RAT gt Occupied Cooling Set point Yes No Yes Is RAT gt Occupied Heating Set point 1 Yes o Yes Error Supply Air Set point Supply Air Temp Is Submaster Reference Minimum 1s Submaster Reference Maximum Set Sub Ref to Maximum Yes Clear Master Loop Set Sub Ref Clamp to Minimum Set Master Loop Set Master Loop Minimum Clamp Maximum Clamp Store Current Error As Previous Error Set Submaster Reference and Integrator 0 LEGEND Cooling Coil Valve Constant Volume Direct Expansion Return Air Temperature Relative Humidity Fig 77 Cooling DX and Chilled Water Control Operation Are of DX Stages Currently Operating 0 Is Submaster Gain Forced Read DX Submaster Gain Yes Yes Is Mixed Air Temp Sensor Functioning Is Mixed Air Temp Forced Yes 18 Damper Type NONE Yes DX Submaster Gain 1 2 DX Submaster Gain DX Submaster Gain 1 2 DX
18. Turn switch on control box to OFF before con necting DHH wiring otherwise electrical shock or equipment damage can result 2 Connect wire from terminal 3 of terminal block 2 TB2 to the terminal labeled ORANGE on the DHH sensor See Fig 57 3 Connect wire from pin 7 of the option module to the sen sor screw terminal labelled RED During humidification the duct high humidity switch must be set to the maximum humidity level desired in the supply duct 8096 minimum Duct Mounted Wall Mounted Relative Humidity Transmit ter Fig 58 Identify the power terminal block ACIN and signal terminal block OUT See Fig 59 and 60 Using 20 AWG twisted wire pair connect the 24 vac power to the terminal labeled ACIN sit FACTORY SUPPLIED STAGE E o es M EN FACTORY SUPPLIED d 2ND So _ L FIELD See SUPPLIED PUMP Field Wiring OPTION MODULE O lt IBU 88 aECI mav lt 2 EET gt amp k v c H Er i i T Bri a H D Br Bl tc 8 NOTE The relay furnished is SPDT relay with silver cadmium oxide contacts rated
19. 001 Fan Relay The fan relay is factory wired and installed on all 39L and 39NX units It is a SPST relay that provides a normally open contact The relay interfaces with the mo tor starter circuit and automatically starts stops the fan when the HOA switch is in the AUTO mode The contacts are sil ver cadmium oxide and are rated as follows 48 va at 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor The contact terminations are factory wired to TB1 Duct High Humidity Switch Fig 28 The duct high humidity switch DHH is shipped inside the fan sec tion It is used as a safety input when the humidity control options have been ordered The DHH adjustment knob pro vides settings from 15 to 95 humidity Locate the DHH control element in the duct downstream of the humidifier Adjust the DHH to the ASHRAE American Society of Heating Refrigeration and Air Con ditioning Engineers recommended maximum setting of 80 Settings higher than 80 are not recommended The DHH is normally mounted in a horizontal position on the outside surface of the duct with the sensing element ex posed to freely circulating air 45 CAUTION DO NOT install the duct high humidity switch in lo cations where excessive moisture corrosive fumes and or vibration are present Be sure to allow minimum dimen sions from the elbows or junctions as indicated in Fig 29 Moun
20. Accessory kit wire PANEL SIDEWALL ON DOOR PSIO PSIO MASTER SLAVE ELECTRIC HEAT DX COOLING COIL THESE COMPONENTS BELOW UPPER PANEL SIDEWALL ON DOOR OX COOLING COIL ELECTRIC HEAT THESE COMPONENTS BELOW UPPER PANEL gt n 5 gt x ARRANGEMENT FOR SIZES 08 THROUGH 35 Fig 5 PIC Section Control Box Component Arrangements 39L Fig 6 PIC Section Control Box Component Arrangement 39NX Sizes 07 21 ren L NVUL EG 39NX Sizes 26 92 Fig 7 PIC Section Control Box Component Arrangement 0 1 HEATER INTERLOCK RETURN FAN INTERLOCK 2 fee RS ee a 4 FIELD SUPPLIED d FIRE SHUT L 4 H L DOWN RELAY IF APPLICABLE CIRCUIT PIC CONTROL BOX Fig 8 Fan Motor Starter Circuit and PIC Control Wiring Interface PIC Power for Control Circuit From Dedicated Source 11 Table 1 Input and Output Points MODULE INPUT CHANNEL OUTPUT CHANNEL DEFAULT ADDRESS INPUT E OUTPUT 0125 NUMBER __ 13 25 r 14 15 RH A 4 1 ur 5 5 po 7 PSIO Processor SPT A o a me 1 00 ADDREBS 1 NUM E j
21. D car GEN 5 2 40 wy D 07 DU cgi I LER Y gt 2 035 08 gt ra S uJ sD us 16 GD sav GD SET va MS 62 0D mY cn Ter ua 44 42 CEU a S 699 21 FIELD INSTALLED CONNECTIONS PSIO SLAVE PLS FIELD 7 4 gt COMMUNICATION C3 CONNECTIONS gt PSIO MASTER DETAIL TYPICAL FOR ALL ACTUATORS Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 22 FIELD INSTALLED CONNECT IONS ELECTRIC HEAT L1 FIELD L2 POWER _ L3 SUPPLY DSIO J4 lel eis m 2 r m gt 4 e e gt r lt gt lt gt Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 23 FIELD INSTALLED CONNECTIONS DX COOLING WITHOUT ELEC HT WITH ELEC HT Gres 0510 J3 gres 0510 J3 pal Eie Get Bios DX COIL DX COIL m DXSD lt ma DXSD oe DSIO J4 Fig 10 Unit Wiring Schematic 39NX Sizes 07 21 115 v Typical cont 24 1edIdAL A SLL 26 92 59215 XNGE oneuieuos LI 614 NYS 92 3215 uolvniov DR gt Y xw WALL ERA 3 1133 aes E 25 1uo5 JedIdAL
22. PSIO COS 4 MASTER FACTORY SUPPLIED FIELD INSTALLED pia FIELD meen CH4 POWER 9 19 SUPPLY RH 4V FACTORY SUPPLIED FIELD INSTALLED lt FIELD T ADE POWER SUPPLY S Be FACTORY SUPPLIED G2 FIELD INSTALLED PL16 9 3 04 PL16 59 49 81 PL16 CAS HEP 52 s CD mmc 2 80 0 6 RED BLK BLU BRN BLK JRN VHT BRN CD CLOCKWISE WIRING ONLY DETAIL A TYPICAL FOR ALL actuators Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 34 FIELD INSTALLED CONNECTIONS ELECTRIC HEAT ADDRESS 19 L1 FIELD 2 POWER 13 SUPPLY DSIU 2 DSTO JS a CH Es r o 71 A C om T ERI gt On 1 29 am Wo gt lt 0 b e I m gt 4 gt TO AUXILIARY CONTACTS UN FAN STARTER Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 35 FIELD INSTALLED CONNECTIONS DX COOLING ADDRESS 19 ADDRESS 49 ELEC WITH ELEC HT gm 510 J3 quus DSIO 3 bx e COIL DX COL Uo DXSD cena THES DXSD 0510 J4 __ m J4 CH eet 33 4 CH cH 54 285 10 CH 86 lt au 0510 JS DXS8 DXS8
23. SLL 26 92 59215 XN6 oneuieuos LI BIg GaTWISN 01314 an 03446 AONE 71109 yu GITNISNI COIS ua 0815646 101594 1102 GNO 100 9 WL 26 1409 jeoid A SLL 26 92 9215 XN6 oneueuos LL 614 8 8 18 yu 27 FIELD INSTLD CONNECTIONS Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 28 FIELD INSTLD CONNECTIONS ELECTRIC HEAT eli FIELD e L2 POWER es L3 SUPPLY DSIO J4 Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 29 FIELD INSTLD CONNECTIONS DX COOLING WITHOUT ELEC HT WITH ELEC HT 0510 J3 Ew 0310 J3 LE wij Lx 23 DX COIL Fig 11 Unit Wiring Schematic 39NX Sizes 26 92 115 v Typical cont 30 1 Old XNGE 166 neways 21 bis 53215 26 92 GATY 3297 TNI AVA 30140139 A9 GNIS di N ild 2NV3S 3715 26 403 ANU 53215 92 10 g OVN 335 WDIV LO AD pid CIN93S C2 kas B CE ANS 4 moa ALVA COD cn Lele WMS G A i
24. Verify that the low limit thermostat reads Normal If not reset the low limit thermostat Verify that the static pressure reads 0 0 in wg with the fan OFF and HOA switch set at OFF VAV units Listed below are steps which must be used to verify different options If the unit is not equipped with MAT RH OARH or FLTS proceed with the testing of the inputs to the Option Module If the unit is equipped with any of these options proceed with their respective testing as follows If an option is not present press 4 for the next available option RH XX MAT X OARH XX FLTS NRM Verify that the relative humidity reading agrees with the actual relative humidity checked with the local weather bureau Verify that the mixed air temperature sensor reading agrees with the actual temperature Verify that the outdoor air relative humidity reading agrees with the actual relative humidity checked with the local weather bureau Verify that the filter status reads Normal Listed below are steps which must be used to verify the inputs to the Option Module If the unit is not equipped with the Option Module proceed with the testing of the outputs Table 19 If the unit is equipped with the Option Module proceed with the testing as follows If an option is not present press for the next available option RVP X SVPX DHH NRM EVAC NRM PRES NRM PURG NRM Verify that the temperature sensor reading agrees wit
25. perature is below the set point or the supply fan is OFF If the supply fan is ON the control reads the humidity sensor if supplied and compares the value to the high humidity limit If the humidity is higher than the high hu midity limit the DX cooling stages are energized to main tain a minimum supply air temperature If the humidity is below the limit the control reads the space temperature sen sor and computes the supply air temperature required to sat isfy conditions Once the required supply air temperature has been cal culated it is compared to the actual supply air temperature and the required DX cooling stages are energized to main tain the desired conditions See Fig 77 for cooling operation and Fig 78 for DX sub master gain operation For more complete information refer to the Application Data book for Product Integrated Con trols with DX Cooling 15 Cool type DX or Coil Yes Set Minimum Submaster Reference to coil value Is Cool Type DX Set Minimum Submaster Reference to Configured DX Value Is Submaster Reference Forced Biased Occupied Yes Is Night Purge Active Clear Integrator No Yes Set Submaster Reference to Maximum Value Is RH gt High Humidity No Limit 18 Unit Type No Is Heat Flag Set Yes Yes Set Submaster Reference to Minimum Error Occupied Cooling Set Master Loop Minimum Clamp
26. 102 loadshed command is cleared by the Loadshed option the control clears the loadshed command itself and returns to normal control The loadshed timer is factory set at 60 minutes MIXED AIR DAMPER CONTROL The mixed air damper control modulates the outside air return air and exhaust air dampers When outside air conditions are unsuitable for at mospheric cooling the dampers are held at the minimum ad justable outside air position The mixed air dampers are modulated to maintain a mixed air temperature equal to supply air temperature set point minus 3 F The dampers can also be modulated to maintain a user configured mixed air tem perature set point If the supply fan is OFF the mixed air dampers are held closed to outside air and held open to return air If the supply fan is ON and the system is not in the HEAT mode the system determines if outside air conditions are suitable for atmospheric cooling The outside air temperature is com pared to the space temperature If the outside air tempera ture is less than the space temperature the system performs either an enthalpy check using an outside air enthalpy switch or a differential enthalpy check If the outside conditions are suitable the control uses the mixed air sensor to maintain the discharge temperature when ever the mixed air sensor option is installed If the sensor is not provided or fails the control uses the supply air sen sor to modulate the dampers and
27. Cooling Test KEYBOARD ENTRY DISPLAY RESPONSE COMMENTS ACTION NOTE Only the configured number of stages are tested and appear on the display DX COOL DXS1 X STG1 TST is turned ON DXS2 X STG2 TST DXS3 X STG3 TST DXS4 X STG4 TST DXS5 X STG5 TST DXS6 X STG6 TST DXS7 X STG7 TST DXS8 X STG8 TST EXIT TST TST CMPL EH EH ES EG EE EE J 4 m A Electronic Valve Actuator Field Test The elec trically operated valve actuators supplied with 2 to 1V4 in valve assemblies are a hydraulic linear piston type The actuators supplied with the 11 in to 3 in valve assem blies are an electro mechanical type Both types of actuators contain a spring as part of the valve assembly The spring returns the stem to its normal position whenever there is a loss of power or signal Both actuators contain an internal solid state drive which accepts a proportional 4 to 20 mA signal generated by the controller An increase in signal proportionally extends the actuator shaft and pushes the valve stem down A decrease in signal retracts the actuator shaft and lifts the valve stem up Valve construction determines normal valve flow either stem up open or stem up closed On 3 way mixing valves stem up allows flow from port B to port AB Perform field test for actuator as follows 1 Verify actuator is powered by 24 vac at the WHITE BLUE and BLACK actuator wires 2 Use a digita
28. DX5G X DX6G X DX7G X DX8G X DX1T X DX2T X DX3T X DX4T X DXST X DX6T X DX7T X DX8T X ee a a ea ea INLET GV MPG X MIG X MDG X SMG X SCV X SMR X SMR X riz DX Direct Expansion Table 13 Keyboard Directory cont SERVICE CONFIGURATIONS Description Configuration of cooling chilled water coil or DX Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value High humidity limit Submaster reference value Submaster reference value forced Configure DX cooling Submaster gain Submaster gain forced Minimum submaster reference Stage 1 Time Guard device Stage 2 Time Guard Stage 3 Time Guard Stage 4 Time Guard Stage 5 Time Guard Stage 6 Time Guard Stage 7 Time Guard Stage 8 Time Guard Stage 1 logic type Stage 2 logic type Stage 3 logic type Stage 4 logic type Stage 5 logic type Stage 6 logic type Stage 7 logic type Stage 8 logic type Configuration of inlet guide vanes Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value Submaster reference value Submaster reference value forced OAVP Outside Air Velocity Pressure 73 Keyboard Entry Display IE E H z gt m z 2 5 isi
29. Display Description Configuration of analog temperature preheat coil control Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value Fan off value Controlling temperature sensor Submaster reference value Submaster reference value forced Configuration of discrete output control Controlling temperature sensor Discrete output logic type Hysteresis Service history Number of starts in the last 24 hours Total number of starts Total number of fan run hours Day of week and time of the last Start Day of week and time of the last Stop Configuration of service maintenance alarms Service maintenance alarm limit hours x 1000 Service maintenance elapsed hours hours x 1000 History of timed overrides Hours of timed overrides 75 Keyboard Entry ea Fd a PPP r PE s sd Bu Fr el Fs bs 4 E T SET POINT SETPOINT OHSP X OCSP X UHSP X UCSP X SPSP X SASP X CFSP X HUSP X AOSP X DOSP X Q1SP X Q2SP X OVSP X DEMAND DL1 X DL2 X TIME DAY HH MM MM DD YY DAYLIGHT ENM X END X ENT X LVM X LVD X LVT X HOLIDAY MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR MM DD DUR Description System set points Occupied heating se
30. K KELVIN WATER GAUGE WATT mm Hg MILLIMETERS Pa PASCAL MERCURY J JOULE tonne 1000 kg N NEWTON kcal fg FRIGORIE h HOUR bar 100 kPa Copyright 1996 Carrier Corporation Tab Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 3 1b PC 201 Catalog No 533 913 Printed in U S A Form S9L NX 2SI Pg 116 3 96 Replaces 39L NX 1SI
31. RESISTANCE TEMP RESIS TEMP RESIS TEMP RESISTANCE Ohms F Ohms 22 74 j 23 75 173 631 0 3602 5 168 222 0 459 3533 4 162 998 0 3465 9 157 954 0 3399 8 153 083 0 148 378 0 143 833 0 9 353 1 3210 1 139 442 0 9 148 2 3149 6 135 200 0 8 948 4 3090 4 131 101 0 8 753 5 3032 5 4 2 127 139 0 8 563 4 2975 8 94 5 123 310 0 8 378 0 2920 3 75 1 119 609 0 8 197 1 2866 0 56 1 116 031 0 8 020 7 37 5 112 571 0 7 848 6 19 2 109 226 0 7 680 6 2710 0 01 3 105 992 0 7 516 8 2660 2 83 7 108 863 0 7 356 9 2611 4 66 4 99 837 3 7 200 9 2563 7 1049 4 96 910 2 7 048 6 2516 9 1032 8 94 078 4 6 900 0 2471 2 1016 5 91 338 6 6 755 0 2426 4 88 687 3 6 613 4 2382 5 86 121 6 6 475 2 2339 5 83 638 4 6 340 3 81 234 8 6 208 5 78 908 0 6 079 9 2215 9 76 655 3 5 954 3 74 474 2 5 831 7 72 362 1 5 712 0 2099 8 70 316 7 5 595 0 2062 6 68 335 6 5 480 8 2026 3 66 416 7 5 369 2 1990 6 64 557 9 5 260 2 1955 7 62 756 9 5 153 7 1921 5 61 012 0 5 049 7 1887 9 59 321 1 5 4 948 1 1855 1 57 682 4 5 4 848 8 1822 9 56 094 3 4 4 751 8 1791 3 54 554 9 4 4 657 0 53 062 2 4 4 564 4 51 615 9 3 4 473 8 50 213 1 3 4 385 3 48 853 0 3 4 298 9 47 533 9 2 4 214 3 46 254 7 2 4 131 7 45 013 9 4 050 9 43 810 3 3 971 9 42 642 6 3 894 6 41 509 8 3 819 1 40 410 5 3 745 3 39 343 9 3 673 1 D 41 Outdoor Air Temperature Sensor Fig 19 The outdoor air temperature OAT senso
32. also be installed on a roof or other location For distances up to 500 ft use 2 conductor 20 AWG cable to connect the sensor to the PIC terminals Refer to the Field Wiring Connections section page 52 for further wiring in structions See Table 4 for thermistor resistance according to temperature value Table 4 Thermistor Resistance vs Temperature Values for Outdoor Air Temperature Sensor RESISTANCE TEMPERATURE RESISTANCE TEMPERATURE Ohms F Ohms F 168 250 77 121 350 86 88 500 95 65 200 104 48 535 113 36 476 122 27 665 131 21 165 140 16 325 149 12 695 158 9 950 167 6 245 176 1 2 IN NPT MALE THREADED ADAPTER S Fig 19 Outdoor Air Temperature Sensor P N HH79NZ023 BUILDING WALL OR DUCTWORK 2 MALE FIELD SUPPLIED WATERPROOF JUNCTION BOX WITH CONDUIT ADAPTOR GASKET COVER 2 FEMALE SCREWS ADAPTOR WIRE NUTS 7 MIN OUTSIDE AIR SENSOR Ww EMT ELECTRICAL METAL TUBING Fig 20 Outdoor Air Temperature Sensor Installation Mixed Air Temperature Sensor The optional mixed air temperature sensor MAT is factory wired and installed on all units with a factory installed mixing box MXB filter mixing box FMB or air blender AMX On units without an AMX MXB or FMB the optional MAT is pack aged and shipped inside the fan section for field installation The field installed MAT should be mounted downstream of the return ai
33. circuit to protect the unit Adjust the minimum inverter speed to provide at least 1096 airflow when inlet guide vanes are at 096 4 mA and maxi mum design airflow when inlet guide vanes are at 10096 20 mA Use the local interface device to verify that the supply fan status 4 shows the fan is ON and that the supply fan is operating at the lowest airflow adjustment In crease inverter minimum speed as required For additional information see the Quick Test section on page 103 Water Valve Assemblies Water valve assemblies Fig 13 are shipped inside the fan section for field instal lation All valve assemblies have electrically powered ac tuators Each actuator has an external junction box for field wiring The junction box contains 24 vac power wires WHITE BLUE BLACK and 4 to 20 mA signal wires F RED GREEN The actuators operate the valve through a linear stroke if power is lost a return spring reverses the stroke and returns the valve stem to the normal position CAUTION To prevent electric shock and equipment damage dis connect the power to the control box before installing valve assemblies Turn power switch located on control box door to OFF On installations where valve mounting space is limited use unions to couple valve assemblies to water lines If unions do not provide sufficient clearance refer to the Valve Troubleshooting section page 109 On chilled water applications or hot
34. it was shipped A replacement PSIO master mod ule must have the Factory Configuration de faults changed in the field to match the configuration of the unit in which it is being installed Other settings may also need to be reconfigured to match the unit con figuration and or the original module s settings 9 Perform the Initial Check run the Quick Test and verify that the unit is operating correctly as described in the Start Up section on page 103 10 Close the PIC control box door UNIT TROUBLESHOOTING PROBLEM POSSIBLE CAUSE PIC control is OFF Faulty connections PIC control has incorrect time Supply fan HOA switch in OFF position Unit does not run Safety controls are tripped PIC control left in Quick Test Display shows Mode 38 Unit is configured for and is currently in Demand Limit Mode CV units only Unit is in Smoke Evacuation or Fire Shut down mode Display shows 35 or 37 Minimum inverter set point too low VAV units only No fan status CORRECTIVE ACTION Check for correct power or blown fuses F2 Correct any deficiencies Check LEDs on control module PSIO If LED is not solidly illuminated check for loose connections If all wires and connectors are secure replace PSIO module as described on page 112 Verify control shows correct time If incorrect enter correct time Verify HOA switch is in the AUTO position Check low temperature thermostat and high pressure switch VA
35. mm 0 003281 ft 304 8 mm mm 1 0 10 6 L m 1 0 m mm 6 102x10 5 in 0 01639 L m 3 281 ft 0 3048 m L 1 0 L m 1 094 yd 0 9144 m L 0 03531 ft 28 32 L m 1 0 m Maes 58 d m 1 308 0 7646 9 0 03527 2835 4 L 2113 043 L kg 1 0 kg mL cm nd 10 mL 79 2205 98 57 mL cm 0 03381 U S oz 29 57 mL U S ton tonne Mg 1 102 0 9072 tonne Mg Volume Time 2000 15 m h 02778 L s Power m h 0 5886 ft min 0 4719 L s kcal h 1 163 m3 h 4 403 U S gal min 0 06309 L s kcal h 3 968 Btu h 0 2931 L h 2 778 10 4 L s HP metric 0 7355 kw L h 4 403x10 U S gal min 0 06309 L s 7 m h HP metric 0 9863 HP 550 0 7457 kw Woes nei jm 1780 cfm ton 0 1342 L s kW Mcal h 1 163 kw Mcal h 0 3307 Ton refr 3 517 kw Pressure METRIC CONVERSION ENGLISH CONVERSION mm w g 49 9 806 Pa TECH FACTOR UNIT FACTOR SIUNIT mm w g 4 C 0 03937 in 20 39 2 F 2491 09 0 1333 kPa Temperature mm Hg O C 0 03937 in Hg 32 F 3 386 kPa 9 273 15 98 07 ec C x 1 8 32 F CF 32 1 8 C 14 22 psi 6 895 kPa 20 3 281 ft 0 2 989 kPa PREFIXES LEGEND UNITS M MEGA 106 m METER cP CENTIPOISE k KILO 103 CALORIE cSt CENTISTOKE d DECI 107 kg KILOGRAM mass HP metric PS CV ch METRIC 10 2 kgf KILOGRAM FORCE HORSEPOWER m MILLI 1073 kp KILOGRAM FORCE mm w g MILLIMETERS MICRO 10 6 L LITER WATER GAUGE ec DEGREES CELSIUS mm CE MILLIMETERS
36. ter coil It has a range of 34 to 60 F and is factory set at 35 LTT is wired in series with the motor starter fan relay If any 1 ft section of the capillary tube senses cold air at or below the thermostat setting the fan shuts down A manual reset is provided to restart the fan after the abnormal prob lem is fixed The temperature setting is field adjustable To adjust the temperature set point turn the adjustment screw located on the top of the case until the position in dicator is at the desired temperature A clockwise rotation increases the set point CAUTION DO NOT set low temperature thermostat below 35 F Damage to freezestat may result If the temperature exceeds the set point by 5 F or more the reset button will restore the circuit Outdoor Air Thermostat Fig 37 Also called the condensing unit status CUST switch the outdoor air thermostat is a temperature actuated switch used in systems with direct expansion cooling The thermostat is field installed in the outdoor condensing unit to prevent the sys tem from operating when the outdoor air temperature is lower ADJUSTMENT MANUAL RESET SCREW BUTTON Fig 36 Low Temperature Thermostat P N 22 2001 than the condensing unit s minimum temperature When in stalled the thermostat must be set to the minimum operating temperature of the condensing unit If the condensing unit has an optional low ambient control Motorma
37. 0 hrs Time override value 1 hr Time override value 0 hrs NTFC Nighttime Free Cooling Used to read or change factory configuration of heating coil See Example 10 Example 10 Configuration of Heating Coil KEYBOARD DISPLAY ENTRY RESPONSE HEATCOIL COMMENTS Heat coil field configuration subfunction of service function MPG 8 0 MPG Master proportional gain Master proportional gain value is changed to where new value within the allowable range MIG 0 3 Scroll past master integral gain MDG 0 0 MDG 0 0 Master derivative gain Master derivative gain value remains 0 0 old value is still displayed N value is not within the allowable range SMG 7 5 Submaster gain 5 5096 Submaster center value FOV 40 Fan off value Display of submaster reference value The submaster reference value has been forced The submaster reference value force has been removed SMR NOTE The subfunctions to configure the cooling coil inlet guide vanes gt mixed air damper 1 and electric heaters 1 1 are performed in the same manner as Example 10 SMR X SMR N Used to read or change factory configuration of cooling chilled water coil or direct expansion Used to read or change configuration of direct expansion cooling options 9 Used to read or change factory configuration of inlet guide vanes 1 o Used to read or cha
38. 20 and 21 Outside air temperature sensor OAT 5 and 6 Enthalpy switch ENT 34 and TB2 3 Mixed air temperature sensor MAT 8 and 9 Space temperature sensor SPT 17 and 18 NOTE The MAT is factory wired on all units with a factory installed mixing box filter mixing box or air blender SPACE TEMPERATURE SENSOR SPT The space tem perature sensor cover includes terminal block TB1 a jumper between Pin E2 and Pin E3 and an RJ11 female connector The RJ11 female connector connects the service tool with the Carrier Comfort Network CAUTION Jumper MUST be in place between Pin E2 and Pin E3 or inaccurate readings could result Ensure that the jumper is in place before installing the sensor Using a 20 AWG twisted pair conductor cable rated for the application connect one wire of the twisted pair to Terminal T1 and connect the other wire to Terminal T2 on TBI See Fig 45 The other ends of the wires are connected to the processor PSIO master module As polarity is not a consideration connect one wire to Terminal 17 and one wire to Terminal 18 of the processor module RJ11 Plug Wiring Refer to the Carrier Comfort Network Interface page 64 for communication bus wiring and cable selection The cable selected must be identical to the CCN communication bus wire used for the entire network Cut the CCN wire and strip the ends of the RED WHITE and BLACK conductors Insert and secure the RED wire to Pin J2 of the
39. 37 Close Close Off Set point This subfunction displays the current operating system set points 5 Outputs The output subfunction displays or To view set points depress then use the key forces the output value percentage of the inlet guide vanes to display the occupied heat set point Continue to depress mixed air damper and heating and cooling valves It also displ ll th Table 13 displays or forces the ON OFF status of the supply fan and LOOSE ay ath Men a OS system SCE Doms SERA heat interlock relay displays the status of electric heat stages shows the order of the various set points and displays optional output status for return fan volume con trol analog output temperature control discrete output tem perature control discrete output time clock and humidifier 24 Inputs The inputs subfunction displays the read stages ings at the various temperature sensors fan status static pres To read a system output value enter 5 then scroll sure sensors enthalpy switch and freezestat It also allows to the desired output using the To force system the outside air temperature sensor enthalpy switch return air relative humidity sensor outside air relative hu output value see Example 4 Table 13 shows the order of midity sensor and filter status to be forced to a user deter t
40. 75 80 85 90 95 00 105 2 4 7 10 13 6 18 21 24 27 29 32 35 38 41 43 DRY BULB TEMP F C CONTROL SETTINGS RELATIVE DIAL HUMIDITY 26 CONTROL SETTING CURVE A A B B C C D D Fig 24 Enthalpy Control Settings Supply Air Temperature Sensor Fig 25 The supply air temperature sensor SAT measures the tempera ture of the air as it leaves the supply fan The sensor is factory installed on the fan scroll Return Air Temperature Sensor Fig 25 The return air temperature sensor RAT is shipped inside the fan section It measures the temperature in the return air duct Mount the sensor in the middle of the return air duct ap proximately 4 to 5 ft from the return air damper The sen Sor s probe tip must be within a straight length of duct Mount the sensor as follows Remove the cover of the sensor junction box 2 Drill or punch 1 hole on the centerline of the re turn air duct as indicated in Fig 26 3 Drill or punch 2 holes through the sensor gasket into the fan scroll 44 4 Remove the adhesive backing from the gasket attach the gasket to the outside of the junction box aligning the holes in the gasket with the holes in the box Attach the junction box to the duct with the 2 screws provided Insert the probe assembly through the compression fit ting and into the duct Tighten screws one half turn past finger tight Do not overtighten For d
41. Alarm Limits KEYBOARD DISPLAY ENTRY RESPONSE Alarm limit field configuration of 2 2 subfunction of service function Scroll past space temperature low SPLO 65 limit occupied mode COMMENTS Scroll past space temperature high 5 80 limit occupied mode Scroll past space air temperature SPLU 45 low limit unoccupied mode LJ Scroll past space air temperature SPHU 100 high limit unoccupied mode Supply air temperature low limit set SALO 45 at 45 F occupied mode Supply air temperature low limit changed to N where N new value within allowable range 10 F to 245 F SALO N Example 15 Configuration of Analog Temperature Control KEYBOARD DISPLAY ENTRY RESPONSE COMMENTS 2 3 AO CTRL Analog temperature control configuration subfunction of Service function Scroll past master proportional MPG 5 0 gain MIG 0 3 Scroll past master integral gain MDG 0 0 Scroll past master derivative gain Scroll past submaster center SCV 50 value FOV 40 Scroll past fan OFF value Controlling temperature sensor SEN 0 none configured Controlling temperature sensor configured to sensor 1 Sensor codes as follows s s s SMG 5 0 Scroll past submaster gain s s 1 1 Supply air temperature sensor standard 2 Outdoor air temperature sensor standard 3 Mixed air temperature sensor optional 6 Space temperature sensor standa
42. Configuration of fan tracking Supply velocity upper limit Return velocity upper limit Supply duct area Return duct area Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value Submaster reference value Submaster reference value forced 74 Keyboard Entry LILIE z eS Seca eee ee ca es es SERVICE CONFIGURATIONS HUMIDITY MPG X MIG X MDG X SMG X SC VX SMR X SMR X ALRMLIMT SP SP SP SP SA SA SA SA RA RA RA RA LO X X LU X HU X LO X HO X LU X HU X LOX HO X LU X HU X TLO X TH Ox TLU X TH UX OATL X OATH X MATL X MATH X RH RH LX HX ORHL X ORHH X SP SP sv sv RV RV Q1 Q2 LX HX PLX PH X PLX PH X ML X MH X HX HX Description Configuration of humidity Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value Submaster reference value Submaster reference value forced Configuration of alarm limits Space temperature low alarm limit occupied Space temperature high alarm limit occupied Space temperature low alarm limit unoccupied Space temperature high alarm limit unoccupied Supply air temperature low alarm limit occupied Supply air temperature high alarm limit occupied Supply air temperature low alarm limit unoccupied S
43. RAD Return Air Damper Actuator Factory installed and wired if ordered with exhaust box NOTE Return fan power circuit may be different than the supply fan starter power Fig 50 Smoke Control Option Wiring Schematic 39NX 57 ANALOG DEVICE FOR ANALOG OUTPUT TEMPERA TURE CONTROL The analog controlled device selected must be capable of receiving a 4 to 20 mA signal Its internal impedance must not exceed 600 ohms The power supply of the analog device must be field in stalled Using a 20 AWG twisted wire pair wire the control signal as follows Fig 51 1 Connect the positive contact to pin 46 of the option module 2 Connect the negative contact to pin 47 of the option module DEVICE UNDER DISCRETE OUTPUT TEMPERATURE CONTROL The factory supplied SPDT relay must be field installed and wired See Fig 52 The relay contacts are rated as follows 48 vaat 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor The relay provides a set of contacts normally open and nor mally closed using no 6 screw terminals while the 24 vdc coil connections are through 1 4 in quick connects Using a 20 AWG twisted cable connect the relay coil con tacts 1 and 2 to the option module pins 50 and 51 Connect the device to be controlled to the normally open or normally closed contacts of the relay Pay close attention to the con tact ratings listed a
44. Relay Module 19 DSIO for Electric Heat or DX Control High Voltage Relay Module 49 DSIOs for Electric Heat and DX Control If all of the preceding modules except the processor mod ule indicate communication failure check the COMM plug on the processor PSIO master module for proper seating and check the communications bus wiring as shown in Fig 69 on page 65 If the condition persists even though plug connections and wiring are correct replace the proces sor module as described in the Module Replacement section STATUS AND COMMUNICATIONS LEDs ADDRESS SELECTOR PSIO Fig 83 Module Address Selector Switch and LED Locations COMMUNICATIONS LEDs ADDRESS SELECTOR STATUS LED If only the PSIO slave or DSIO module indicate commu nication failure check the affected module for proper seat ing If the condition persists even though connections are correct replace the module as described in the following section Module Replacement PSIO DSIO The PSIO master module controls the standard unit functions the PSIO slave module controls many optional functions and the DSIO module controls electric heat and or DX cooling If the mod ule LEDs are not blinking and the unit or features associated with the module do not work the module may need to be replaced Before replacing an inoperative module check to ensure that The PIC control box power is on Power at th
45. SP K A s __ _ __ p j 9 j ms o pw s pes ENT DI 12 SVP A 31 RFVC 43 RVP A 32 HUM1 DO 44 DHH DI 33 HUM2 45 TEMP AOTC o 46 PRES D 35 Do 4 PSIO Option EVAC D 36 f DD 48 ADDRESS 31 PURG F D qr 011688 FSD b a AS 939 j j AQ2 A Ee dp AM 42 Ot uo j METER o 2 j o 25 __ Es 24 DSIO Ee e Heat 54 DO 26 ADDRESS 19 j 27 28 j 29 r Esss 30 __ Dsi 25 80 o o 1 e 24 1 25 DSIO DX without 26 Electric Heat ADDRESS 19 LL 27 8 28 __ 29 DXS8 DO 30 CUST 49 DXS1 DO 53 DXSD 50 DXS2 DO 54 DXS3 DO 55 paG Eo IE ni Electric Heat 0487 DO 26 ADDRESS 49 57 Pxss 58 e 3057 59 p 60 LEGEND AFS Airflow Switch Supply Fan DXS1 8 Direct Expansion Cooling MIXD Mixed Air Dampers Status Switch Stages 1 8 OARH Outdoor Air Relative Humidity Analog Input DXSD Direct Expansion Cooling Outdoor Air Temperature AO Analog Output Shutdown OAVP Outdoor Air Velocity Pressure AOTC Analog Output Temperature EHS1 8 Electric Heater Stages
46. Submaster Gain MAT SAT Stages RAT SAT DX Stages Is DX Submaster Gain Maximum DX Gain DX Submaster Gain Maximum DX Gain Is DX Submaster Gain Minimum DX Gain DX Submaster Gain Minimum DX Gain LEGEND DX Direct Expansion MAT Mixed Air Temperature Store DX RAT Return Air Temperature SubnasterGatn SAT Supply Air Temperature Fig 78 DX Submaster Gain Control Operation 98 MIXED AIR DAMPER CONTROL The mixed air damper control adjusts modulating outside air return air and exhaust air dampers When outside air conditions are unsuitable for atmospheric cooling the dampers are held to an adjustable minimum outside air position When outside air conditions are suitable for atmospheric cooling the mixed air dampers are modulated to maintain a space temperature that is be tween the heating and cooling set points in an effort to mini mize the need for heating or mechanical cooling The damper set point is automatically adjusted as a function of outdoor air temperature or can be set to a fixed value by the user If the supply fan is OFF the mixed air dampers are kept closed to outside air and open to return air If the fan is ON the system checks to see if the system is in the HEAT mode If system is in the HEAT mode the mixed air dampers are held in the minimum position If the system is not in the HEAT mode it determines if the outsi
47. Tes Stage 2 test Stage 3 test Stage 4 test Stage 5 test Stage 6 test Stage 7 test Stage 8 test Tes ing of elec ing of elec ing of elec ing of elec ing of elec ing of elec ing of elec ing of elec ric hea ric hea ric hea ric hea ric hea ric hea ric hea ric hea stage 1 stage 2 stage 3 stage 4 stage 5 stage 6 stage 7 stage 8 Factory field test of DX cooling Stage 1 test Tes Tes Tes Tes Tes Tes Tes Tes Exit Tes ing DX coo Stage 2 test ing DX coo Stage 3 test ing DX coo Stage 4 test ing DX coo Stage 5 test ing DX coo Stage 6 test ing DX coo Stage 7 test ing DX coo Stage 8 test ing DX coo quick test completed ing stage 1 ing stage 2 ing stage 3 ing stage 4 ing stage 5 ing stage 6 ing stage 7 ing stage 8 77 Keyboard Entry ss Es ns 1 HISTORY Display ALARMHST ALARM X ALARM X ALARM X ALARM X ALARM X ALARM X ALARM X ALARM X ALARM X MTMN HIS MM DD YY Description Alarm history Latest alarm Previous alarm Previous alarm Previous alarm Previous alarm Previous alarm Previous alarm Previous alarm Previous alarm Maintenance history Latest service date STATUS FUNCTION The status function shows the cur rent status of alarm diagnostic codes operating modes set points all measured system tempera
48. Type 0 normal 1 in Normal Inverted Normal DX Cooling Stage 2 Logic Type 0 normal 1 Normal Inverted Normal DX Cooling Stage 3 Logic Type 0 normal 1 Normal Inverted Normal DX Cooling Stage 4 Logic Type 0 normal 1 Normal Inverted Normal DX Cooling Stage 5 Logic Type Normal Inverted Normal DX Cooling Stage 6 Logic Type 0 4 md Normal Inverted Normal DX Cooling Stage 7 Logic Type 0 Normal Inverted Normal DX Cooling Stage 8 Logic Type 0 normal 1 inverted Normal Inverted Normal Inlet Guide Vanes Master Proportional Gain 0 to 5 0 0 5 Inlet Guide Vanes Master Integral Gain 0 to 2 0 0 3 9 Inlet Guide Vanes Master Derivative Gain 0 to 5 0 0 0 Inlet Guide Vanes Submaster Gain 10 0 to 10 0 5 0 Inlet Guide Vanes Submaster Center Value 96 0 to 100 50 Mixed Air Damper Master Proportional Gain 0 to 20 0 8 0 Mixed Air Damper Master Integral Gain 0 3 10 Mixed Air Damper Master Derivative Gain 0 0 Mixed Air Damper Submaster Gain 7 5 Mixed Air Damper Submaster Center Value 50 Mixed Air Damper Minimum Position 96 10 Electric Heat Master Proportional Gain 8 0 11 Electric Heat Master Integral Gain 0 3 Electric Heat Master Derivative Gain 0 0 Electric Heat Submaster Gain 5 0 12 NTFC Lock Out Temperature F 40 to 70 50 LEGEND Constant Volume DX Direct Expansion NTFC Nighttime Free Cooling VAV Variable Air Volume Value varies and is automatically calculated by the control Overrid
49. a day is flagged yes for 2 overlapping periods occu pied time will take precedence over unoccupied time Occupied times can overlap in the schedule with no consequence To extend an occupied mode beyond its normal termination for a one time schedule override program as shown below Override is set for 0 enter the number of hours of override desired Unit will now remain in occupied mode for an additional 3 hours 91 Example 24 Using the Schedule Function cont KEYBOARD DISPLAY ENTRY RESPONSE PROGRAMMING PERIOD 6 For this example Period 6 is used for holiday only OCC 00 00 ENTR COMMENT Start of occupied time Occupied time will start at 20 00 8 00 pm Start of unoccupied time end of period 6 For this example period 6 should end at 21 00 9 00 pm Period 6 ends at 21 00 9 00 pm Check to be sure that Monday through Sunday are flagged no for period 6 OCC 20 00 UNO 00 00 2 2 4 UNO 21 00 WED NO THU NO FRI NO SAT NO SUN NO Holiday is flagged no Change to yes Holiday is now flagged yes for period 6 1 1 11 1 HOL NO HOL YES CONTROL OPERATING SEQUENCE Constant Volume and Variable Air Volume Units TWO POSITION DAMPER CONTROL Two position damper control opens or closes field supplied and installed two position outdoor air dampe
50. achieve the set point When the outside temperature is less than 40 the mixed air damper opening rate is limited to 596 per minute to pro tect against nuisance low temperature thermostat tripping and coil freeze up Rate limiting is off when the dampers are closed START UP Initial Check IMPORTANT Do not attempt to start unit even mo mentarily until the following steps have been com pleted 1 Verify unit has been installed per the Installation Start Up and Service Instructions shipped inside the unit 2 Verify that all auxiliary components valves sensors etc have been installed and wired to the PIC control box 3 Verify that the motor starter and HOA switch have been installed and wired NOTE HOA switch must be in OFF position 4 Check to be sure area around unit is clear of construc tion dirt and debris 5 On VAV units verify that the static pressure probe and associated piping have been installed 6 Verify that Chilled water valve is in its normal position Hot water steam valve is in its normal position Outside air damper is closed Return air damper is open Inlet guide vanes are closed VAV units 7 Set control configurations Units are shipped with ap plicable controls programmed to the default values shown in Table 16 8 Set unit set points Units are shipped with the set point default values shown in Table 17 If a different set point is required change as shown in th
51. admitted during the Occupied period to main tain the ventilation rate at its set point or pollutants at or below the configured set points of the air quality AQ sen sors See Fig 76 CO sensors are available from the factory as options for field installation VOC or other types of sensors can be field supplied and installed Sensors used with the IAQ feature can be configured several different ways One sensor can be installed in either the space or return air stream to continuously monitor a single gas Two sensors monitoring the same gas can be installed in different locations to provide separate inputs For ex ample one sensor can be located in an occupied space and another in the return air duct or each sensor can be in stalled in a different occupied space Two sensors typically VOC sensors monitoring the same gas can be installed inside and outside the occupied space for comparative measurements The control is configured to modify the damper position based on the value of the sensor in the occupied space but before admitting outside air the control performs a differential check to determine if the value of the sensor measuring the outside air is higher If the outside sensor has a higher value the damper does not change position Systems with One AQ Sensor During the unoccupied period the minimum damper position maintained by the control is 0 During the occupied period the control 94 reads
52. air temperature The num ber of heat stages is factory set for each unit heater If the supply fan is OFF all stages of electric heat are turned off If the fan is ON the control determines if the system is in morning warm up If it is the return air sensor is read and compared to the Occupied Heating set point If heat is re quired the control calculates the supply air temperature re quired to satisfy conditions Once the required supply air temperature has been cal culated it is compared to the supply air temperature to de termine the number of heat stages required to satisfy con ditions The required stages are energized sequentially with 2 second intervals between stages and the heat interlock re lay is energized For VAV units the number of stages turned on is limited by the PIC IGV output Once the morning warm up is completed heat is not ac tivated again unless OCCUPIED HEAT has been selected Submaster Reference to Minimum Clear Integrator No No No Set Set I Term Zero OA OAC OAVP 15 Constant Outdoor Air Enabled Is Unit Type VAV w Analog Dampers Is Unit Occupied 15 Submaster Reference Forced Submaster Reference Forced Value Clear Integrator Yes Yes Yes Yes Compute Error Set point OAVP Is OAC Flag Set or OAVP lt OAVP Set point Yes Compute I Term Is Master Loop Clamped Yes
53. below Test is now completed The unit is back under normal automatic control Table 21 Electric Heater Test DISPLAY COMMENTS ACTION NOTE Only the configured number of stages are tested and appear on the display Le lfe HOHOHOHOHOHOHEHO ELE HEAT EHS1 X STG1 TST EHS2 X STG2 TST EHS3 X STG3 TST EHS4 X STG4 TST EHS5 X STG5 TST EHS6 X STG6 TST EHS7 X STG7 TST EHS8 X STG8 TST EXIT TST TST CMPL Entering field test of electric heater Set the HOA switch to AUTO The tan starts If equipped the IGVs open to 30 After an 11 second delay the 1st stage of heat is turned ON The 1st stage of heat is turned OFF After a 2 second delay the 2nd stage of heat is turned ON The 2nd stage of heat is turned OFF After a 2 second delay the 3rd stage of heat is turned ON The 3rd stage of heat is turned OFF After a 2 second delay the 4th stage of heat is turned ON The 4th stage of heat is turned OFF After a 2 second delay the 5th stage of heat is turned ON The 5th stage of heat is turned OFF After a 2 second delay the 6th stage of heat is turned ON The 6th stage of heat is turned OFF After a 2 second delay the 7th stage of heat is turned ON The 7th stage of heat is turned OFF After a 2 second delay the 8th stage of heat is turned ON The fan and preceding stage of heat shut OFF Test is complete The unit is back under automatic control 107 Table 22 Direct Expansion DX
54. chy 42 5 13 j Fig 12 Unit Wiring Schematic 39L and 39NX PIC with Remote Control Box cont 36 Table 2 Junction Box Connections for Optional Remote Control Box REMOTE CONTROL FAN SECTION JUNCTION CONTROL BOX BOX JUNCTION BOX BOX LOCATION TERMINAL SIGNAL TERMINAL MPSIO MPSIO 2 MPSIO 8 MA BK 3 MPSIO 4 5 MPSIO 6 7 MPSIO 13 LTT K1 8 TB2 10 TB2 MPSIO 12 13 14 TB2 15 TB2 RAD RED 16 17 i8 SiR 19 TB 20 21 TB2 22 MPSIO 38 SFAN1 GRN 23 MPSIO 37 SFAN1 RED 24 25 TB2 26 TB2 27 TB2 28 SPSIO 29 SPSIO 30 TB 31 TB2 32 SPSIO 33 SPSIO 34 NOTES 1 Pneumatic tubing to connect the airflow sensor in the fan to the remote control box is bundled with the internal PIC wiring to the junction box but does not enter the box Route tube directly to remote control box along with conduit containing wiring from junction box to remote control box 2 See Legend on page 7 37 Variable Frequency Drives The input signal for the inverter must be 4 to 20 mA Use a 2 conductor 20 AWG American Wire Gage cable single twisted pair unshielded to connect the input of the inverter to the output of the PIC control terminals See Fig 8 Wire the inverter so that if it is placed in the manual or bypass mode the low temperature thermostat and the high pressure switch if supplied are still in the motor control
55. key may also be used to disable the functions SET POINT FUNCTION Set points are entered through the keyboard Set points can be changed within the upper and lower limits which are fixed See Table 17 Example 17 Service History Configuration KEYBOARD DISPLAY ENTRY RESPONSE 2 5 SERVHIST COMMENTS Service history configuration subfunction of service function The unit had 2 starts within the last 24 hours The unit had a total of 20 starts since the unit was manufactured The fan has run for 240 hours since unit manufacture The unit was last started on Thursday at 6 30 am The unit was last stopped on Thursday at 7 00 pm SDAY 2 ST 20 FH 240 4 06 30 4 19 00 87 Example 18 Service Maintenance Alarm Configuration KEYBOARD DISPLAY ENTRY RESPONSE GJ 5 Service Maintenance alarm configuration subfunction of Service function Service Maintenance alarm limit is 2000 hrs hours x 1000 Service Maintenance alarm limit is changed to 5000 hrs This represents the cumulative number of hours the fan must be energized before a service maintenance alarm is generated NOTE Entering a disables the alarm function Service Maintenance elapsed hours is 3000 This is the amount of time elapsed from the start of the service maintenance alarm interval Example 19 Timed Override History KEYBOARD ENTRY RESPONSE gt
56. mode to be initiated the input signal must be main tained for no less than 2 seconds Evacuation Mode The building fire alarm system must pro vide a normally open dry contact closure which when ac tivated energizes the Evacuation mode When the Evacuation mode is energized the supply fan shuts down the return fan starts the outside air and return air dampers close and the exhaust air dampers open This mode remains in effect for as long as the input signal is maintained at the fire system panel alarm is generated from this input and sent to the Building Supervisor In order for this mode to be initiated the input signal must be main tained for no less than 2 seconds Pressurization Mode The building fire alarm system must provide a normally open dry contact closure which when activated energizes the Pressurization mode When the Pressurization mode is energized the supply fan starts the return fan shuts down the outside dampers open and the exhaust and return air dampers close This mode remains in effect as long as the input signal is maintained at the fire system panel An alarm is generated from this input and sent to the Building Supervisor In order for this mode to be initiated the input signal must be main tained for no less than 2 seconds Smoke Purge Mode The building fire alarm system must provide a normally open dry contact closure which when activated energizes the smoke purge mode Wh
57. or modify the IAQ functions An adjustable maximum position for the mixed air damper is provided for each AQ sensor and a selection is available to maintain the minimum mixed air temperature at approximately 45 F Space temperature and humidity protection can temporarily sus pend IAQ functions until the temperature and humidity con ditions return to the desired set points On VAV systems dur ing cooling the IAQ function can be limited to maintain the required supply air temperature Is IAQ enabled and fan N AQ Priority 2 and occupied and damper type analog y Compute error sensor set point Set integrator to zero is SPT outside temperature check range Y Compute Integral term If clamped doas new term clear clamp 18 SAT outside allowable range 5 8 Deg Y Compute proportional term Compute output value 547 Set integrator to zero 18 RH Cooling Coil High Humidity Is output gt configured AQ Maximum Damper Position is AQ Type Differential Single Gas Clamp at AQ Maximum Damper Position Is output lt zero Output AQ minimum damper position 15 Mixed Alr Temperatura Protection enabled LEGEND integrator o AQ Air Quality Sensor IAQ Indoor Air Quality Is output gt clamp MAT Mixed Air Temperature Outdoor Air Temperature RH
58. press If input is within the allowable range the display shows the parameter and new value If the input is not within the allowable range the old value remains displayed Example 20 Reading and Changing System Set Points KEYBOARD ENTRY RESPONSE O SETPOINT 70 0 GJ 5 E OCSP 75 0 COMMENTS System set points Present occupied heating set point is 68 0 Key in 70 and press ENTR display shows new occupied heating set point is 70 which is within the allowable range Present occupied cooling set point is 78 0 Key in 30 and press ENTR display still Shows occupied cooling set point as 78 0 because 30 is not within the allowable range See Table 15 Key in 75 and press ENTR display shows new occupied cooling set point is 75 0 which is within the allowable range OHSP 68 0 Reading and Changing Time and Date Display Time is entered and displayed in 24 hour military time The day of the week is entered as a number 1 MON 2 TUE 7 SUN The month is also entered as a number 1 JAN 2 FEB 12 DEC The LJ key is used as the colon when entering the time and date See Example 21 Reading and Changing Daylight Savings Time Example 22 shows how to read and change daylight savings time The month is entered as a number 1 January 2 February 12 December The day of week and time of day are entered as explained in Reading and Changing Time a
59. proper cooling set point and Submaster Gain SMG An improper SMG can cause the CCV to be held closed Overcooling temperature sensor VAV units Configuration error LEGEND CV Constant Volume Cooling coil valve CCV is forced open Check status of CCV 5 STAT If CCV is forced remove force and check operation Incorrect reading from space temperature sensor supply air temperature sensor or return air Variable Air Volume 113 Check status of sensor readings for accuracy Replace sensor if defective Check configuration for proper cooling set point and Submaster Gain SMG An improper SMG can cause the to be held open PROBLEM Mixed air dampers will not operate Unit not main taining desired static pressure VAV units only High Pressure Switch keeps tripping unit OFF VAV only POSSIBLE CAUSE No fan status UNIT TROUBLESHOOTING cont Mixed air dampers forced closed to outside air No power to damper actuator CORRECTIVE ACTION Check status of SFS 4 STAT If supply fan status switch is OFF check switch for proper operation Check status of MIXD 5 STAT If MIXD is forced remove force and check operation Check for blown fuse F7 Replace if necessary If fuse is intact check for proper connections Check transformer output Incorrect reading from space temperature sensor or supply air temperature sensor Check status of sensor readings for accura
60. the AQ1 sensor input and compares it to the config ured set point The control then calculates the minimum damper position to maintain the set point If no other control is at tempting to adjust the dampers to a more fully open position than the IAQ control the damper is adjusted to the position determined by the IAQ control Otherwise the damper is positioned by the superseding control routine or at its con figured minimum position Systems with Two AQ Sensors Separate Readings The preceding sequence for the AQI sensor also applies to the 2 sensor but the damper position is determined by either the AQI or the AQ2 sensor according to which sensor value demands the more fully open damper position Systems with Two AQ Sensors Differential Check If dif ferential sensing is configured for two VOC sensors the con trol reads the AQ2 outside air sensor to determine if its value is greater or less than that of the AQ1 indoor air sen sor If the AQ2 value is greater than the value of the AQI sensor the mixed air damper position is set to 0 If the AQ2 value is less than the AQI value by at least 1 of the con figured minimum sensor value the control uses the AQI value to modulate the dampers and maintain the AQ set point IAQ System Protection To protect the system against coil freeze up in cold climates or high heat and humidity in warm climates the system provides several user selectable fea tures to override
61. the current time is within the configured night purge duration the control reads the outdoor air temperature and determines the mixed air damper position If the outdoor air temperature is less than the configured NTFC lockout tem perature the system sets the mixed air dampers at the con figured low temperature position If the outdoor air temperature is greater than the NTFC set point or the enthalpy is high the system sets the dampers at the configured high tempera ture position When the outside air temperature is below the NTFC set point and the low temperature night purge damper position 15 set to zero night purge is not performed Also when the outside air temperature is above the NTFC set point and en thalpy is high if the high temperature night purge damper position is set to zero night purge is not performed Night purge ends when the occupied time period begins QUICK TEST The Quick Test is initiated and controlled at the local interface device HSIO It allows the service person or building owner to test all inputs and outputs of the PIC controls When used it displays all current values of input channels and allows the user to exercise all output channels Quick test suspends all process algorithms and forces all outputs with a service priority service forces are removed when Quick Test is exited and control is returned to the process algorithms ANALOG OUTPUT TEMPERATURE CONTROL PREHEAT CONT
62. upper housing If necessary a 158 open end wrench may be applied on the flats provided on the actuator base The actuator BRACKET NUT T MOUNT may be rotated as desired to facilitate wiring BRACKET i MOUNTING connections BOLT ACTUATOR HOUSING VALVE BODY Fig 82 Valve Assemblies 17 to 3 in Typical Linkages HIGH TEMPERATURE SPRING _ EXTENSION COMBINATION STEM Example 25 Forcing An Output EXTENSION AND LOCKNUT KEYBOARD COMMENTS ENTRY 5 OUTPUTS System outputs IGV 96 Scroll past Inlet Guide Vane status Fig 80 Valve Assemblies 2 in to 1 MIXD 95 Scroll past Mixed Air Damper Typical Linkages status HCV 96 Heating Coil Valve status 10 FORCED Heating Coil Valve is forced 1096 Display flashes continuously 96 1096 force is removed from heating coil valve Display stops flashing NOTE Electric heat and DX cooling stages cannot be forced other outputs under s can be forced Fig 81 Valve Mounting Angle 110 TO REASSEMBLE ACTUATOR TO VALVE BODY 2 way normally open valves Push the valve stem completely down and close seat valve NOTE It may be necessary to shut down the system pump to ensure valve stem is closed 2 Loosen locknut and screw stem extension down fully on valve stem to adjust stem extension for proper closure 3 Attach actuator to valve linkage mounting
63. 03 2 Adaptive Optimal Start Stop Enabled Disabled Disabled Timed Override Schedules 1103 1 1 Time schedule 1 2 Time schedule no 2 3 Both Timed Override Hours 0104 0 Heating Coil Master Proportional Gain 0 to 20 0 8 0 Heating Coil Master Integral Gain 0 to 2 0 0 3 6 Heating Coil Master Derivative Gain 0 to 20 0 0 0 Heating Coil Submaster Gain 20 0 to 20 0 7 5 Heating Coil Submaster Center Value 96 0 to 100 50 Heating Coil Fan Off Value F 35 to 65 40 Cooling Master Proportional Gain 0 to 20 0 8 0 Cooling Master Integral Gain 0 to 2 0 0 3 7 Cooling Master Derivative Gain 0 to 20 0 0 0 Cooling Coil Submaster Gain 20 0 to 20 0 7 5 Cooling Coil Submaster Center Value 0 to 100 80 Cooling High Humidity Limit 96 0 to 99 99 DX Cooling Submaster Gain 2 0 to 25 0 DX Cooling Minimum Submaster Reference 0 to 60 40 DX Cooling Stage 1 Time Guard Device 0 disabled Enabled Disabled Enabled DX Cooling Stage 2 Time Guard 0 disabled 1 Enabled Disabled Enabled DX Cooling Stage 3 Time Guard 0 disabled 1 Enabled Disabled Enabled DX Cooling Stage 4 Time Guard 0 disabled 1 Enabled Disabled Enabled DX Cooling Stage 5 Time Guard 0 disabled 1 Enabled Disabled Enabled DX Cooling Stage 6 Time Guard 0 disabled 1 Enabled Disabled Enabled 8 DX Cooling Stage 7 Time Guard 0 disabled 1 Enabled Disabled Enabled DX Cooling Stage 8 Time Guard 0 disabled 1 Enabled Disabled Enabled DX Cooling Stage 1 Logic
64. 0v 50 60Hz VAV AF S9NX Cooling Coil Valve 1 None 2 Normally open 3 Normally closed 4 Three way 5 Direct Expansion DX Local Interface Device HSIO 1 None 2 Standard 3 Remote Filter Switch FLTS Option 1 None 2 One switch 3 Two switches 39NX only 4 Three switches 39NX only Mixed Air Temperature Sensor MAT 1 None 2 MAT factory installed in MXB FMB AMX 3 Separately shipped 4 Low temperature thermostat LTT factory installed no MAT supplied 5 LTT factory installed with MAT in factory installed MXB FMB AMX 6 LTT factory mounted with separately shipped MAT Humidity Sensors 1 None 2 Wall mounted space humidity sensor 3 Duct mounted sensor 4 Outside air and return air differential 5 Space and return air differential Damper Control Type Factory Supplied MXB FMB actuator and enthalpy switch MXB FMB actuator and enthalpy switch MXB FMB actuator only differential enthalpy MXB FMB actuator only differential enthalpy Enthalpy switch only Differential enthalpy only MXB FMB actuator and enthalpy switch MXB FMB actuator only differential enthalpy Three way valves in Q 1 2 2 0 1 2 4 0 S 3 4 68 T 1 12 0 U 11 4 16 0 V 11 2 33 0 W 2 55 0 X 21 2 67 0 Y 3 91 0 1 None Outside Air Source Cooli
65. 1 8 PRES Pressurization Control ENT Enthalpy Switch PURG Purge AQ1 2 Air Quality Sensors 1 2 EVAC Evacuation RAT Return Air Temperature CUST Condensing Unit Status FLTS Filter Status Switch RFVC Return Fan Volume Control Outdoor Air Thermostat FSD Fire Shutdown RH Relative Humidity Chilled Water Coil HIR Heat Interlock Relay RVP Return Velocity Pressure DI Discrete Input HWC Hot Water Coil SAT Supply Air Temperature DHH Duct High Humidity HUM1 2 Humidity Stages 1 2 SF Supply Fan Relay DO Discrete Output IGV Inlet Guide Vanes SP Static Pressure DOTC Discrete Output Temperature LTT Low Temperature Thermostat Space Temperature Control also labelled FRZ SVP Supply Velocity Pressure DTCC Discrete Output Timeclock MAT Temperature TEMP Optional Temperature Input Control METER Meter Pulsed Dry Contact Available on VAV only Input TDiscrete output with two position damper control jeoid L A SLL 86 60 59216 162 tun 6 2014 2 AVA 1 1m Xy CORED TSS 053 ah n GWD 13 1402 41 A SLL 66 60 sezis 166 6 614 9 au 3 5 0164 0154 9114 8 5 034 m D
66. 16 0 3 4 6 2 V 11 2 33 0 H 1 82 W 2 55 0 J 1 11 0 X 21 2 67 0 11 4 16 0 Y 3 91 0 11 2 25 0 M 2 40 0 N 21 2 65 0 P 3 85 0 Indoor Air Quality None Outdoor Air Velocity Pressure space sensor CO duct sensor space and duct sensors space sensors 2 2 duct sensors 2 BandC BandD BandE BandF BandG Field supplied sensors zrxc rommoom Fan Tracking VAV Return Fan CV 1 None Return fan VAV FC Return fan VAV AF Return fan with inverter Return fan field supplied Return fan CV O O gt Optional Exhaust Air Actuator 1 None 2 15 in Ib torque 3 75 in Ib torque 4 190 in Ib torque Optional Return Air Actuator 1 None 2 15 in Ib torque 3 75 in lb torque 4 190 in lb torque Optional Outside Air Actuator 1 None 2 15 in Ib torque 3 75 in lb torque 4 190 in Ib torque 0 13 3 18 3 3 762 2 1 2 63 5 7 8 22 2 KO TYP ALL SIDES 762 3 4 19 10 30 762 254 NOTE Dimensions in are in millimeters Fig 3 Control Box for Remote Mounting DISCHARGE AIRTIGHT SEAL FAN SECTION REMOTE CONTROL BOX Fig 4 Sealing Control Wiring in Flexible Conduit HSIO MPSIO OAD OAR
67. 39L NX Central Station Air Handling Units With Product Integrated Controls PIC Installation Operation and COMMERCIAL CONTENTS Page DEVICE UNDER DISCRETE OUTPUT TEMPERATURE CONTROL SAFETY CONSIDERATIONS 2 DISCRETE OUTPUT DEVICE UNDER GENERAL 2 TIMECLOCK CONTROL INSTALLATION 2 64 HUMIDIFICATION DEVICES Service Area Requirements 2 AIR QUALITY SENSOR Remote Control Box Option 2 OUTSIDE AIR VELOCITY PRESSURE OAVP REMOTE CONTROL BOX CONDENSATE SENSOR PREVENTION FAN VOLUME CONTROL Make Electrical Connections 3 ELECTRIC HEATER Variable Frequency Drives 38 CARRIER COMFORT NETWORK INTERFACE Water Valve Assemblies 38 OUTDOOR AIR THERMOSTAT K ESTRUM I CONTROL 64 68 Duct Static Pressure Probe VAV Units 39 Processor PSIO Master and Option PSIO Slave Space Temperature Sensor 40 Modules 65 Outdoor Air Temperature Sensor 42 Relay 0510 Module 65 Sensor 2 Local Interface Device HSIO 67 CONTROL OPERATION 69 91 Supply Air Temperature Sensor 44 Accessing Functions and Subfunctions 69 Retur
68. AC m PE ISOLATED L 10 1 POWER m COT NE m OIF ACTUATOR _ IS FACTORY 77 E SUPPLIED Ha a Me o epe O SEPARATE 1 ISOLATED E me i S TB2 21 AND FACTORY M IF ACTUATOR JUMPER IS FACTORY SUPPLIED LEGEND OAD Outside Air D RAD Air Damper ctuator Factory Wiring Field installed if only outside air damper is used Field Wiring NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes Fig 47 Field Supplied Mixing Box Actuator Signal Wiring FIELD SUPPLIED TWO POSITION DAMPER ACTUATOR 4 ic EZ J vd E TONS A L cu SEPARATE ISOLATED POWER SOURCE IF ACTUATOR IS FIELD SUPPLIED 24 120 OR 240 VAC LEGEND OAD Outside Air Damper Actuator Field Wiring x ETE 1 Fig 48 Field Supplied Two Position Damper Relay and Actuator Wiring 55 een Fa int r _ E Ic Em o AUX CONTACT MOTOR 1 1 J 3 aw MN DT L cue 4 280 D 1 Tee 8 9 PROCESSOR l MODULE AO PIN 41 LEGEND AO Analog Output RFR EVAC Eva
69. CTION 39L UNIT Fig 33 Duct Mounted Relative Humidity Sensor Locations 1 8 TYP 4 1 45 2 90 45 12 DIA MOUNTING TEMPLATE e Fig 34 Duct Mounted Relative Humidity Sensor P N HL39ZZ002 Installation Airflow Switch The airflow switch AFS is a snap acting SPDT switch that is factory installed in the PIC con trol box It senses the air supplied by the 39L or 39NX unit and provides the microprocessor module with a 24 vac dis crete signal for fan status See Fig 35 A length of plenum tubing connects the switch to the probe located on the fan side plate The airflow switch range is 0 05 to 2 0 in wg with a dead band of 0 02 in wg at minimum set point and 0 1 in wg at maximum set point NORMALLY NORMALLY CLOSED CONTACT OPEN CONTACT TURN SCREW CLOCKWISE TO INCREASE AIRFLOW CLOSED CONTACT TURN SCREW COUNTER CLOCKWISE TO DECREASE AIRFLOW 7 NIC INLET S HIGH NV SPDT Single Pole Double Throw Fig 35 Airflow Switch P N HKO6WC030 Jf SPDT SNAP Z ACTING SWITCH MOUNTING BRACKET Low Temperature Thermostat Fig 36 The optional low temperature thermostat LTT is factory wired and installed It is used to protect the chilled water coil from freezing whenever abnormally cold air passes through the coil The LTT consists of a 20 ft capillary tube that is serpen tined in the airstream on the entering side of the chilled wa
70. D Air Handling Unit CUST Condensing Unit Status Outdoor Thermostat Product Integrated Control Direct Expansion DSIO Relay Module AHU DX OAT PIC Factory Wiring Field Wiring Fig 70 Outdoor Air Thermostat DSIO Wiring 66 Local Interface Device HSIO Fig 74 The SENSOR BUS CONNECTOR HSIO consists of a keyboard with 6 function keys 5 opera 74 tive keys 10 numeric keys 0 9 and an alphanumeric 8 character liquid crystal display LCD Key use is ex plained in Table 10 Each function has one or more subfunc INPUTS 24 VAC tions as shown in Table 11 These functions are described in CHASSIS CHANNEL l 43 PINS 1 amp 2 greater detail in the Control Operation section of this book GROUND 2 35 The HSIO can be factory or field installed and be re 1 788 RED STATUS LGHT GREEN COMMUNICATION P LiGHT motely mounted if necessary Table 10 Local Interface Device Key Usage 2 4 6 AND 8 ARE GROUND C 5 FUNCTION USE KEYS NC Status Display diagnostic codes and current J5 2 COMMON operating information about the machine OUTPUT T NC Quick Test Check inputs and outputs for RELAYS 5 COMMON proper operation 1 History Check latest service dates and 2 COMMON alarms in order of occurrence NC Service Enter specific unit configuration information Set Point Enter operating set points and COMMO
71. H OAT OAVP LEGEND Fig Airflow Switch Analog Output Analog Output Temperature Control Air Quality Sensor No 1 Air Quality Sensor No 2 Contactor Counterclockwise Channel Control Relay Condensing Unit Status Constant Volume Clockwise Chilled Water Valve Duct High Humidity Discrete Output Discrete Output Temperature Control Control Module Electric Heat and or DX Discrete Time Clock Control Direct Expansion DX Cooling Stage Direct Expansion Cooling Shutdown Electric Heaters Electric Enthalpy Switch Equipment Smoke Evacuation Input Exhaust Air Damper Actuator Filter Status Switch Fire Shutdown Device Fuse Ground Heat Interlock Relay Hand Off Auto Switch High Pressure Switch Keyboard and Display Module Heat Humidifier Hot Water Valve Inlet Guide Vane Actuator Low Temperature Thermostat Mixed Air Damper Actuator Mixed Air Temperature Master Processor Module Processor Module Outdoor Air Damper Actuator Outdoor Air Relative Humidity Outdoor Air Temperature Outdoor Air Velocity Pressure NOTES 1 Use copper conductors only 5 12 Table 2 OT Outside Air Thermostat PH Preheat PL Plug Assembly PRESS Smoke Pressurization Input PSIO Processor Module PURG Smoke Purge Input RAD Return Air Damper Actuator RAT Return Air Temperature RFAN Return Fan RFR Return Fan Relay RFVC Return Fan Volume Control RH Relative Humidity RVP
72. KD 14 1409 JedIdAL A 911 86 60 59215 166 oneuieuos 6 Pla CAN0 53215 12 oR 038 5 01140 6 YH Us au 0 aa S r3 053 oes 20 901 ow L Us py u Aem P ovis E gt cre 45 1 cid alils ERI om i T3 ca GP V j 15 FIELD INSTALLED CONNECTIONS PSIO MASTER FIELD S gt FACTORY SUPPIED FIELO INSTALLED 510 SLAVE Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 16 FIELD INSTALLED CONNECTIONS ELECTRIC HEAT Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 17 FIELD INSTALLED CONNECTIONS DX COOLING WO ELEC HT WITH ELEC HT ol 3183 53 DX DX COIL DXSO CH CH S0 0510 J4 0510 J4 Fig 9 Unit Wiring Schematic 39L Sizes 03 35 115 v Typical cont 18 jeoid A SLL 12 20 59215 66 oneueuos 01 BIg 19 1409 SLL 12 20 59 15 66 oneuieuos 01 614 GD e r as 80 692 Gi dies 1102 GD e 20 1409 jeotd A SLL 12 20 59215 XNGE oneueuos 01 614 AE 00 12 78 res
73. MOKE CONTROL OPTION The smoke control option includes 3 relays which control the 4 different modes of the option These relays are factory wired Terminal block 5 TB5 provides an easy means to wire the field supplied smoke con trol panel to the PIC controller on the 39L or 39NX unit See Fig 49 and 50 SIGNAL INPUT m Ionen STROKE mA Parallel Opposed 00 18 8 4 15 2 in 180 31 in 54 27 001 BLACK and WHITE 24 vac ORANGE signal BLUE signal HF27BB010 WHITE BLUE and BLACK 24 vac RED signal GREEN signal 4 Actuator 27 06 is equipped with 20 ft of plenum cable Wires for ac tuators HY27BB001 and 27 10 are in the actuator junction box 5 Actuators are available as an option when ordered with the unit The approved building fire alarm system must provide 4 different normally open dry contact closures A field supplied 24 vac double pole double throw DPDT fire shut down FSD relay rated for the application 240 vac with a 10 amp minimum is required power going through the smoke control panel dry con tacts and the FSD relay coil is furnished by the PIC control box A 24 vac fused power source uses a factory installed 3 amp in line fuse See Fig 49 or 50 for smoke control op tion wiring details Wire as follows 1 Disconnect all power at the unit PIC control box return fan if applicable and fire panel 2 Wire the supply fan motor sta
74. N SET day time date holiday and daylight savings time information ole COMMON Schedule Enter occupied unoccupied sched 8 NO 5 7 NC ules for unit operation J4 COMMON OUTPUT OPERATIVE USE RELAYS ajel KEYS COMMON Expand Display Display a non abbreviated 5 No expansion of the display o gt Clear Clear the screen of all displays ADDRESS ADJUSTMENT Up Arrow Return to previous display position NOT SHOWN ON UNDERSIDE Down Arrow Advance to next display Fig 72 Relay Module DSIO position Enter data CHASSIS GROUND REAR PSIO DSIO DSIO HSIO PSIO NETWORK PROCESSOR LID OPTION CONNECTOR MODULE MODULE LID Local Interface Device Fig 73 Sensor Bus Wiring Communications FORWARD SENSOR BUS ADDRESS CONNECTOR SWITCHES J8 S1ndNI 0 003 9 PSIO gt o o c o Fig 74 Local Interface Device Fig 71 Processor Module PSIO Master Slave 67 Table 11 Functions and Subfunctions SUB FUNCTION FUNCTION s OMIT Status History Schedule Service Set Point Test 1 Current alarms Alarm history Occupied mode Log on and System set points Quick test of override sched 1 Log off inputs 2 Current operating Maintenance Period 1 Software Demand limits Quick test of modes history of schedule 1 version outputs 3 Current operating
75. N X FTEN X OAEN X NPEN X AQEN X IAQP X OSEN X TSCH X TOVR X HEATCOIL MPG X MIG X MDG X SMG X SCV X FOV X SMR X SMR X Factory configuration Unit type 0 CV 1 Cooling 0 none 1 coil DX cooling stages 0 8 enter number Heating 0 none 1 hot steam 2 electric heat coil Electric heat stages 0 8 enter number Mixed air damper 0 none 1 yes 2 2 position Indoor air quality type Mixed air temperature protection Bus number factory default set 0 Element address factory set default 1 Password XXXX English metric system 0 English 1 metric User configuration Nighttime free cooling configuration Humidity configuration Occupied heating configuration Space temperature reset configuration Demand limiting configuration Fan tracking configuration Constant outside air Night purge Indoor air quality Indoor air quality priority level Optimal start stop configuration Timed override schedules Timed override values Configuration of heating coil Master proportional gain Master integral gain Master derivative gain Submaster gain Submaster center value Fan off value Submaster reference value Submaster reference value forced Display COOLCOIL Keyboard Entry MPG X MIG X MDG X SMG X SCV X HHL X SMR X Ed Pd 5 SMR X DXCOOL SMG X SMG X MSR X DX1G X DX2G X DX3G X DX4G X
76. ONTROL OPERATING SEQUENCE 92 102 Constant Volume and Variable Air Volume Units 92 Constant Volume Units Only 96 Variable Air Volume Units Only 99 START UP ER 103 108 Initial Check 103 Quick 103 Electronic Valve Actuator Field Test 108 CONTROL LOOP CHECKOUT 108 109 To Check Operation of Analog Outputs 108 VALVE TROUBLESHOOTING 109 111 109 All 1 2 in Through 174 Electric Hot Water Steam Valve Assemblies 109 All 1v2 in Through 3 in Valve Assemblies 110 CONTROL MODULE TROUBLESHOOTING 111 112 General 111 Module Replacement PSIO DSIO 112 UNIT TROUBLESHOOTING 113 115 METRIC CONVERSION CHART 116 Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 533 913 Book 3 PC 201 Tab 1b Printed in U S A Form 39L NX 2SI Pg 1 3 96 Replaces 39L NX 1SI IMPORTANT This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with these instructions may cause radio interference It has been tested and found to com ply
77. OPERATION Accessing Functions and Subfunctions See Table 12 Refer also to Table 11 which shows the 6 func tions identified by name and the subfunctions identified by number Table 13 shows the sequence of all the elements in a subfunction Display Functions SUMMARY DISPLAY Whenever the keyboard has not been used for 10 minutes the display automatically switches to an alternating summary display This display has 3 parts day time mode and alarms shown below which alternate in continuously rotating sequence Display Expansion TUE 12 45 TODAY IS TUE TIME IS 12 45 MODE 23 UNOCCUPIED HEATING 2 ALARMS THERE 2 ALARMS DETECTED Return to the previous display at any time by pressing Table 12 Accessing Functions and Subfunctions OPERATION To access a function press the subfunction number and the function name key The display shows the subfunction group To move to the other elements scroll up or down using the arrow keys When the last element in a subfunction has been displayed the first element is repeated To move to the next subfunction it is not necessary to use the subfunction number Pressing the function name key advances the display through all sub functions within a function and then back to the first To move to another function either depress the function name key for the desired function display shows the first subfunction or Access a particular subfunction by us
78. OVRDHIST COMMENTS Timed override history subfunction of service function Within the current 24 hour period beginning at midnight the unit operated for 3 hours in the timed override mode mode 39 OHR 3 ser Displays system set points See Table 13 for sequence of set points 5 Displays holidays month day and duration Table 17 Set Point Ranges and Defaults ALLOWABLE RANGE DEFAULT 40 to 90 68 45 to 99 78 40 to 90 55 70 to 99 90 0 to 5 0 1 5 SET POINT Occupied Heating Set Point F Occupied Cooling Set Point F Unoccupied Heating Set Point F Unoccupied Cooling Set Point F Static Pressure Set Point in wg Supply Air Temperature Set Point F Delta CFM Set Point Humidity Set Point 96 Analog Temperature Control Set Point F Discrete Temperature Control Set Point F Air Quality Sensor 1 Set Point ppm Air Quality Sensor 2 Set Point ppm Outside Air Velocity Pressure Set Point in wg 35 to 65 55 0 to 250 0 0 to 100 40 40 to 100 40 40 to 245 0 0 to 2000 650 0 to 2000 650 0 0 to 5 0 0 08 Reading and Changing Set Points Example 20 shows how to read and change system set points Other set points can be changed by following the same procedure Refer to Table 13 for the display sequence of set points in each sub function To adjust any parameter after enabling the func tion press Juntil desired parameter is displayed Key in new value and
79. Period 2 Factory Current time Quick test of Set points of schedule 1 configuration electric heat 4 System inputs Period 3 English metric Daylight savings Quick test of of schedule 1 System time configuration DX cooling 5 System outputs Period 4 User Holiday Exit quick of schedule 1 configuration configuration test 6 Period 5 Heating coil of schedule 1 configuration 7 Period 6 Cooling coil of schedule 1 configuration 8 Period 7 DX cooling of schedule 1 configuration 9 Period 8 Inlet guide vanes of schedule 1 configuration 10 Occupied mode Mixed air damper override sched 2 configuration 11 Period 1 Electric heat of schedule 2 configuration 12 Period 2 Nighttime free of schedule 2 cooling configuration 13 Period 3 Night purge of schedule 2 configuration 14 Period 4 OAVP of schedule 2 configuration 15 Period 5 Air quality of schedule 2 configuration 1 16 Period 6 Air quality of schedule 2 configuration 2 17 Period 7 Optimal start stop of schedule 2 configuration 18 Period 8 Space temperature of schedule 2 reset configuration 19 Loadshed configuration 20 Fan tracking configuration 21 Humidity configuration 22 Alarms limits P configuration 23 Analog temperature configuration 24 Discrete temperature configuration 25 Service history configuration 26 Service maintenance configuration 27 Timed override DX Direct Expansion 68 history CONTROL
80. Processor PSIO Master and Option PSIO Slave Modules Fig 71 The PSIO master module moni tors and controls components such as the supply fan cool ing and heating coil valves inlet guide vanes and mixed air dampers The PSIO slave module provides additional inputs and outputs to the PSIO master for options such as return fan volume humidifier smoke and air quality control The processor and option modules are factory installed Each PSIO input and output channel has 3 terminals only 2 of the terminals are used The unit application de termines the terminal connections Refer to the unit wiring diagram for terminal numbers The PSIO address switches are factory set at address 01 master and 31 slave Use a local or remote HSIO or the CCN to change the unit address Do NOT change the address switches on the PSIO modules 65 Relay DSIO Module Fig 72 The DSIO mod ule provides additional inputs and outputs to the PSIO mas ter for electric heater and direct expansion coil staging The DSIO module is factory installed If only one DSIO module is used for electric heat or DX cooling the DSIO address switches are factory set at 19 If 2 DSIO modules are used for electric heat and DX cooling the heat module is set to address 19 and the cooling module is set to address 49 See Table 1 The DSIO inputs on strip J3 are discrete ON OFF in puts When 24 vac are applied across the 2 terminals the corresponding channe
81. ROL The analog output tem perature control adjusts an analog output to a fixed set point based on any analog temperature sensor connected to the unit Applicable sensors are space temperature sensor outside air temperature sensor mixed air temperature sensor supply air temperature sensor and return air temperature sensor If the fan is ON the control identifies the controlling tem perature sensor reads the sensor and compares the tempera ture to the configurable set point It then calculates the tem perature required to satisfy the conditions The calculated value is compared to the actual tempera ture and the corresponding output is modulated to the required position The preheat coil control adjusts the steam or hot water valve The valve is modulated to raise the temperature of incoming outside air The control uses a sensor downstream from the preheat coil to monitor the air temperature If the supply fan is OFF the heating valve is modulated to maintain the desired minimum duct temperature fan off value If the supply fan is on and the entering air temperature is below the set point value the heating valve is modulated to obtain the desired leaving air temperature DISCRETE OUTPUT ANALOG INPUT CONTROL The discrete output is controlled as a function of a temperature sensor connected to the 39L or 39NX unit Applicable sen sors are space temperature sensor outside air temperature sensor mixed air tempe
82. RRECTIVE ACTION Enable OAC Verify fan is operating and supply fan status is correct Sup ply fan status must be ON to allow OAC control Verify that current time and date are correct and reconfigure occupancy schedule Change unit type to VAV 1 OAC not available for CV units Verify 24 vac power at sensor input and correct voltage at sensor output Verify that pneumatic tube from sensor to probe is unblocked and correctly connected to the probe Verify that high pressure side of probe faces the airflow Correct problems as necessary Configure OAVP sensor for correct voltage and pressure output ranges Verify above corrective action adjust the probe multiplica tion factor PMF so that the OAVP reading matches that of the measurement device OAVP value sensor value PMF Enable IAQ Verify that current time and date are correct and reconfigure occupancy schedule Verify that priority level is set at 1 or 2 and correct if necessary Level 3 provides no IAQ control only alarm functions Adjust set point to correct lower level Ensure that power and control wiring are correct Verify 24 vac power at sensor input and correct voltage at sensor output Ensure that sensor voltage range and output values are correctly configured Set type to 1 for a single sensor or two sensors used for differential comparison Set IAQ type to 2 for two sen Sors used for separate readings IAQ functions suspended becau
83. SPT terminal strip 1 Insert and secure the WHITE ground wire to Pin J3 of the SPT terminal strip TB1 Insert and secure the BLACK wire to Pin J5 of SPT terminal strip TB1 The other end of the communication bus cable must be connected to the remainder of the CCN communication bus at the COMMI plug on the processor PSIO master mod ule Refer to Carrier Comfort Network Interface section page 64 for more details DAMPER ACTUATORS The PIC processor can activate a field installed modulating exhaust relief damper This is achieved by wiring the factory supplied damper actuator in series with the factory supplied and field installed mixing box damper actuator The PIC processor can also activate a field installed damper actuator mounted in a field supplied mixing box These ac tuators are available from the factory when ordered as an option with the unit See Table 9 for recommended actuators NOTE The actuator selected must be capable of receiving 4 to 20 mA signal and must have a total impedance of less than 250 ohms Wire should be 20 gage minimum twisted pair type and rated for the application LEGEND ENT Enthalpy Switch MAT Mixed Air Temperature Sensor OAT Outside Air Temperature Sensor RAT Return Air Temperature Sensor SPT Space Temperature Sensor Field Wiring PROCESSOR MODULE PROCESSOR MODULE OPTIONAL NOTE Connections for 39NX with integral PIC shown
84. See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes Fig 44 Field Wiring of Sensors COMM 1 ON 4 _ WHITE GND PROCESSOR MODULE RED Q 1 Field Supplied Exhaust Damper Wire the 4 to 20 mA sig nal of the factory supplied exhaust damper actuator as fol lows Fig 46 1 Select a 20 AWG twisted pair conductor cable rated for the application Identify the positive and negative signal contacts on the actuator 2 Install cable from the actuator to the PIC control box PROCESSOR 7 CAUTION MODULE iL r To prevent equipment damage Power must NOT be con RJ11 CCN BLACK nected to an earth ground actuator case must NOT be CONNECTION TBI connected to control input terminals TO 3 Remove jumper no 84 from between terminals 2 7 and 8 Connect positive lead to terminal 8 of TB2 Connect negative lead to terminal 7 of TB2 Field Supplied Modulating Mixing Box Wire the 4 to 20 mA signal of the factory supplied damper actuator as fol lows Fig 47 1 Select a 20 AWG twisted pair conductor cable rated for the application Identify the positive and IMPORTANT Jumper may be connected from E1 to E3 Move jumper to connect E2 and E3 before installing sensor otherwise incorrect space tem negative signal contacts on the actuator pera
85. V units only Reset switches if necessary Using the local interface device exit Quick Test Press 5 TEST and then ENTR to exit Verify that unit should be in the Demand Limit mode If not cycle power to PIC to release unit from Demand Limit mode Verify that unit should be in one of these modes If not check for shorted input on Fire Shutdown or Evacuation Adjust minimum to 2096 at 4 mA signal and 10096 at 20 mA signal Check status of SFS 4 STAT If SFS is OFF check supply fan status switch for proper operation Switch must be ON for heat coil to function properly Heat coil valve HCV is forced closed Check status of HCV 5 STAT If HCV is forced remove force and check operation NO hot water or steam available no power if electric heat Check source and correct any problems found Electric heater safety tripped No heat No power to valve Overheating Reset heater safety Check for proper operation Check for blown fuse F6 Replace if necessary If fuse is intact check for proper connections Check transformer output No power to electric heater control Incorrect reading from space temperature sensor supply air temperature sensor or return air temperature sensor VAV units Configuration error Heat coil valve HCV is forced open Incorrect reading from space temperature sensor supply air temperature sensor or return air temperature sensor VAV units Check for blown fus
86. X Number of hours to extend occupied mode of schedule 2 1 1 PERIOD 1 Define period 1 of time schedule 2 OCC X Start of occupied time UNO X Start of unoccupied time Monday x entry code 1 yes 0 or CLR no TUE X Tuesday flag x entry code 1 yes 0 or CLR no i WED X Wednesday flag x entry code 1 yes 0 or CLR no THU X Thursday flag x entry code 1 yes 0 or CLR no FRI X Friday flag x entry code 1 yes 0 or CLR no Saturday x entry code 1 yes 0 or CLR no SUN X Sunday flag HOL X Holiday flag HE Time periods 2 8 of schedule 2 same elements as period 1 schedule 2 4 EN EET CV Constant Volume DX Direct Expansion Variable Air Volume 72 Keyboard Entry Description Enter password to log on 1 1 LOGGEDON Log okay When finished with configuration log off as follows Shows that configurations are LOGGEDON available LOG OFF Log off okay configurations again LOGD password protected 2 VERSION Software version XXX XX X Software version number E m H i 212181 RES d a Fal bud i fn ss ed ina iu ad el 5 FACT CFG TYPE X COOL X DXST X HEAT X EHST X MIXD X IAQT X MATP X BUS X ADR X PSW X UNITS X USER CFG NTEN X HUEN X OHEN X RSEN X DLE
87. accu rate velocity pressure reading for the entire duct Manifold tubing must be larger than the plenum tubing connecting the manifold to the control box See Fig 43 and the preceding for recommended tube sizes 1 2 IN OD TYP 1 44 OD OAVP TRANSDUCER IN CONTROL BOX SEE FIG 5 7 NOTE High pressure manifold connections shown Low pressure con nections are identical and must duplicate high pressure connections Fig 43 Probe Manifolding OAC CALIBRATION Once the probe and tubing are in If the airflow obtained by the preceding method is differ stalled input the set point to match the probe readings Be ent from the design airflow or a measurement obtained with fore adjusting the OAVP probe ensure that the supply air a balancer the OAVP probe is not sensing the average duct fan is providing the maximum design airflow and that the velocity and or the probe s multiplier factor is effectively not outside air dampers are adjusted for the design outdoor 1 563 To match the design or measured airflow to the air airflow intake flow determined with the preceding formulas relocate To calibrate the PIC processor to match the probe loca the probe as recommended or use the HSIO and service tion use a precision manometer to measure the velocity pres function 1 4 to change the probe multiplier sure in the outdoor air duct at design conditions Use the factor HSIO local in
88. ad or change factory configuration of user options See Example 9 84 Example 8 Configuration of Measurements KEYBOARD DISPLAY ENTRY RESPONSE bs E Ao COMMENTS Measurements are displayed using English 0 English 1 Metric Measurements are now displayed using the Metric system Measurements are returned to English Example 9 User Configurations KEYBOARD DISPLAY ENTRY RESPONSE 5 1 USER CFG NTEN DSB NTEN EN NTEN DSB HUEN 0 i HUEN 0 DSB RSEN DSB DLEN DSB FTEN DSB OAEN DSB NPEN DSB AQEN DSB IAQP DSB cl P e e e E a OSEN DSB OSEN EN OSEN DSB TSCH 1 2 2 TSCH 1 TOVR 0 TOVR 1 141 TOVR o o gt m z gt COMMENTS User configurations NTFC is disabled NTFC is enabled NTFC is disabled Humidifier control is none Unit changed to analog humidifier control Humidifier control is changed back to none Scroll past occupied heating disabled Space temperature reset disabled Scroll past demand limiting disabled Fan tracking disabled Constant outside air disabled Night purge disabled Indoor air quality disabled Indoor air quality priority level disabled Optimal start is disabled Optimal start is enabled Optimal start is disabled Time schedule No 1 is enabled Time schedule No 2 is enabled Time schedule is changed back to No 2 Time override value
89. amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Table 13 Keyboard Directory cont QUICK TEST Keyboard Entry nic INPUTS SAT X OAT X SPTX RAT X ENT X SFSX FRZ X SPX RH X MAT X OARM X FLTS X TEMP X RVP X SVPX DHH X EVAC X PRES X PURG X FSD X MTR X OAVP X AQ1 X AQ2 X CUST X DXSD X ee tc DX Direct Expansion Display Description Factory field test of inputs Supply air temperature Outside air temperature Space temperature Return air temperature Enthalpy switch status Airflow switch status Freezestat Static pressure Return air relative humidity Mixed air temperature Outside air relative humidity Filter status Temperature input Return velocity pressure Supply velocity pressure Duct high humidity Evacuation Pressurization Smoke purge Fire shutdown Wattmeter Outside air velocity pressure Air quality 1 Air quality 2 Condensing unit status DX cooling shutdown 76 Keyboard Entry BS EIS YES 11 11 1 1 1 1 QUICK TEST Display OUTPUTS HOV X TEST CCV X CCV TEST MIXD X MIXD TEST IGV X IGV TEST SF X FAN TEST HIR X HIR TEST RFVC X RFVCTEST HUM1 X HUM1TEST HUM2 X HUM2TEST AOTC X AOTCTEST DOTC X DOTCTEST DTCC X DTCCTEST Description Factory field test of outputs Entering he
90. ao ES 3 i NYJ Na 3el 52 1 C XIADA 11214 ey WANOA e 9 anis M 2 NYS Aldd s _ _ 2 P FIELD PUWER SUPPLY ij 11 181 SEE LABEL CURRECT VOLTAGE 31 Jld XNGE pue 166 HUN 21 614 gt Nag g ND 3215 26 01 304 ELM BL i eL LII us a 52715 26 02 i Ea as 9 138 9 1 ES E 14 CANG 26 91 ADI ZI RE WD 53215 92 20 UYUYA HS AAAA OD 05 Nud Iye M Nai Te tial vail 5 g ADI 01 NYAL 3 CANO 53215 12 20 lg NIE 338 433 Io nb 20140159 u tc Ox t zg 2d x eT eme PU mcr eie me mr erige fere eget men COMES VI 5 ADE2 LER PEE T tea COND 8X3 6 vati Ti 31iue iv et 90 80 SD G s aas G5 v 094
91. as follows 48 vaat 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor Fig 56 Wiring of Two Stage Humidification Control Relays GRD OPTION MODULE m TB2 FIELO WIRING DHH DUCT HIGH HUMIDITY SWITCH Field Wiring NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes Fig 57 Wiring of the Duct High Humidity Switch CAUTION The 24 vac power source s to both duct mounted and wall mounted relative humidity transmitters MUST be isolated Connecting either side to a ground will per manently damage the sensor The power for the relative humidity transmitters may be sourced from the valve 24 vac power source at wire no 6 and 7 or at wire no 4 and 5 Connect the signal wires as follows Secure one wire to the terminal labelled OUT located at the right of terminal block OUT Secure the other wire to the negative signal output terminal terminal adjacent to the terminal labelled OUT Run the twisted pair of signal wires to the PIC control box Observe all local code requirements Outdoor Relative Humidity Transmitter Connect the posi tive wire to pin 31 of the processor module Connect the ne
92. at the unit is in the Quick Test mode It allows the user to test all inputs and outputs con nected to the PIC controller All control routines are deac tivated when the unit is in this mode This mode can only be initiated manually when the supply fan status is OFF HOA switch is in OFF position In order to reactivate all the configured control routines press 5 and then press Timed Override 39 Indicates that the unit operation has been extended by the user Unit must be configured for Timed Override schedule and timed override hours 5 79 Display ANOUBRWN Display Table 14 Display Codes FORCE STATES Description Fire mode force Internal safety force Quick Test Service tool force HSIO Building Supervisor force Remote Building Supervisor force Loadshed minimum offtime force Data transfer force BEST Building Environmental Systems Translator force Temperature override force Loadshed force OPERATING MODES Description Temperature Reset in effect Demand Limit in effect Unoccupied Heating mode Unoccupied Cooling mode Optimal Start mode Unoccupied mode Optimal Stop mode Occupied Heating mode Occupied Cooling mode Occupied Fan Only mode Nighttime Free Cooling mode Pressurization mode Evacuation mode Smoke Purge mode Fire Shutdown mode Quick Test mode Timed Override mode ALARMS Description Air quality 1 high limit Air quality 2 high limit Air quality constant outside air s
93. ating coil valve test Testing heating coil valve Entering cooling coil valve test Testing cooling coil valve Entering mixed air damper test Testing mixed air dampers Entering inlet guide vanes test Testing inlet guide vanes Entering supply fan test Testing supply fan Entering heat interlock relay test Testing heating interlock relay Entering return fan volume test Testing return fan volume Entering humidifer stage 1 test Testing humidifer stage 1 Entering humidifier stage 2 test Testing humidifier stage 2 Entering analog temperature control output test Testing analog temperature control output Entering discrete temperature control output test Testing discrete temperature control output Entering discrete time clock control output test Testing discrete time clock control output QUICK TEST Keyboard Entry Display 3 ELE HEAT EHS1 X STG1 TST EHS2 X STG2 TST EHS3 X STG3 TST EHS4 X STG4 TST EHS5 X STG5 TST EHS6 X STG6 TST EHS7 X STG7 TST EHS8 X STG8 TST CB YE Y 112121 TC DXCOOL 4 m a A DXS1 X STG1TEST DXS2 X STG2TEST DXS 3 X STG3TEST DXS4 X STG4TEST DXS5 X 5 5 5 DXS6 X STG6TEST DXS7 X STG7TEST DXS8 X STG8TEST EG 8 EG YI 112121 EXIT TEST TST CMPL DX Direct Expansion Factory field test of electric heat Table 13 Keyboard Directory cont Description Stage 1 test Tes Tes Tes Tes Tes Tes
94. bove See Fig 53 DEVICE Field Wiring DISCRETE OUTPUT DEVICE UNDER TIMECLOCK CONTROL The factory supplied SPDT relay must be field installed and wired Fig 52 The relay contacts are rated as follows 48 vaat 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor The relay provides a set of contacts normally open and nor mally closed using no 6 screw terminals while the 24 vdc coil connections are through 4 1 quick connects Using a 20 AWG twisted cable connect the relay coil con tacts to the option module pins 53 and 54 Connect the de vice to be controlled to the normally open or normally closed contacts of the relay Pay close attention to the contact ratings listed above See Fig 54 ct OPTION MODULE gt o UT 2 lt EZE 10 M 00 H i m z 46 ro C mL 2 Bi c m ti ir ees BBY 59 TTT Fig 51 Wiring of Analog Device for Analog Output Temperature Control 1 5 lt 8 Field Wiring NOTE The relay furnishe
95. bracket and secure with self tapping screws 4 Make all necessary electrical connections 5 Electrically power actuator by turning circuit breaker to ON Turn HOA switch to OFF position Perform the heat ing coil valve quick test to stroke the actuator to its full extended position See Example 26 Leave the unit in test mode and proceed to Step 6 6 Screw the stem extension up until its hole aligns with the hole in the actuator piston 7 Screw the stem extension 2 full turns farther up into the actuator piston 8 While still in Quick Test press 4 to retract actuator piston and align holes to insert connecting pin Exit Quick Test 9 Tighten the locknut against the stem extension Example 26 Heating Coil Valve Test 2 Way Normally Open KEYBOARD ENTRY RESPONSE 2 OUTPUTS NOTE For more complete instructions on the Quick Test procedure see Quick Test in the Start Up section pages 103 108 COMMENTS Entering factory test of outputs HCV 96 Entering heating coil valve test The hot water steam valve strokes to 10096 Exit Quick Test HCV TEST EXIT TST TST CMPL Test completed 2 way normally closed and 3 way mixing valves 1 Raise the valve stem completely up and close valve seat NOTE It may be necessary to shut down the system pump to ensure valve stem is closed 2 Loosen locknut and screw stem extension down fully on valve stem to adjust stem extension for p
96. ce The sensor should be mounted at least 1 ft above or ft below the thermostat to avoid direct breath contact Do not mount the space sensor in drafty areas such as near supply ducts open windows fans or over heat sources Al low at least 3 ft between the sensor and any corner Avoid mounting the sensor where it is influenced by the supply air the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return air stream To accurately monitor the quality of the air in the return air duct locate the sensor at least 6 in upstream or 15 in downstream of a 90 degree turn in the duct The downstream location is preferred Mount the sensor in the center of the duct If the sensor is mounted in the return air duct readjust the mixed air dampers to allow a small amount of air to flow past the return air damper whenever the mixing box is fully open to the outside air If the damper is not properly ad justed to provide this minimum airflow the sensor may not detect the indoor air quality during the economizer cycle Fig 39 Air Quality Sensor Wall Mount Version Shown 20 CFM PERSON 5 CFM PERSON AIRFLOW PER PERSON OUTSIDE AIR CFM 0 500 700 900 1100 1300 1500 1700 1900 2100 2300 2500 CONCENTRATION PPM Fig 40 Ventilation Rates Based on CO Set Point Constant Outsid
97. ck operation Using squeeze bulb check trip point of HPS Adjust as re quired Check for plugged lines Replace if defective Using local interface device and squeeze bulb with gage verify static pressure reading is correct Adjust or replace sensor as required Check configuration for proper static pressure set point Check SMG An improper SMG can cause the IGVs to be held open Individual actuators do not function Oscillating output HCV CCV IGV MIXD etc Sensor not reading correctly No power blown fuse Linkage is jammed or binding No control signal Incorrect submaster gain Input sensor is fluctuating supply air temperature sensor static pressure transducer Loose connections Sensor out of calibration Defective sensor 114 Check fuses of specific actuator for function failure Fuses are as follows F1 PSIO control module F2 Power Cooling coil F4 IGVs supply fan F5 DSIO or option module F6 Heating coil F7 Mixed air dampers F8 Smoke control or return air damper F9 Exhaust air damper F10 IGVs return fan F11 sizes 74 92 2nd IGV actuator supply fan F12 39NX sizes 74 92 2nd IGV actuator return fan F13 Preheat coil Using manufacturer s instructions correct and adjust linkage Check operation Using Quick Test and a voltage meter set to measure cur rent verify that the proper contro
98. cuation SF EXD Exhaust Air Damper Actuator SFR FSD Fire Shut Down TB HOA HAND OFF AUTO Switch TRAN HPS High Pressure Switch LTT Low Temperature Thermostat OAD Outside Air Damper Actuator PRES Pressurization papery a RAD Return Air Damper Actuator NOTE The return fan power circuit may be different than the supply fan starter power Return Fan Relay Supply Fan Contactor Supply Fan Relay Terminal Block Transformer Remove Jumper Factory Wiring Field Wiring Fig 49 Smoke Control Option Wiring Schematic 39L 56 PROCESSOR MODULE AO PIN 40 OPTION MODULE PRESSURE PIN 13 OPTION MODULE PURGE PIN 19 OPTION MODULE FIRE SHUT DOWN PIN 16 OPTION MODULE EVACUATION PIN 16 Z cesis 28 3 eg 4 8 AUX CONTACT PROCESSOR MODULE AO PIN 40 OPTION MODULE PRESSURE PIN 13 OPTION MODULE PURGE PIN 19 FIRE SHUT DOWN PIN 16 OPTION MODULE EVACUATION PIN 16 PROCESSOR MODULE AO PIN 41 LEGEND AO Analog Output RFR Return Fan Relay EVAC Evacuation SF Supply Fan Contactor EXD Exhaust Air Damper Actuator SFR Supply Fan Relay FSD Fire Shut Down TB Terminal Block HOA HAND OFF AUTO Switch TRAN Transformer HPS High Pressure Switch Factory Wiring LTT Low Temperature Thermostat Field Wirin OAD Outside Air Damper Actuator 9 PRES Pressurization
99. cy Replace sen Sors if defective Configuration error No fan status Check configuration for proper SMG and MDP minimum damper position If MDP is set to zero then dampers will stay closed when enthalpy is unsuitable An improper SMG can cause the MIXD to be held to the MDP setting Check for proper damper set point If damper set point is forced to incorrect value remove force Check status of SFS 4 STAT If SFS is OFF check supply fan status switch for proper operation Inlet guide vanes IGVs forced closed Check status of IGV 5 STAT If IGVs are forced remove force and check operation No power to IGV actuator s Loose IGV linkage Check for blown fuse F4 Replace if necessary If fuse is intact check for proper connections Check transformer for proper output Check IGV linkage for tightness and proper adjustment Incorrect reading from static pressure transducer Configuration error IGVs forced open High Pressure Switch HPS is incorrectly set or defective Static pressure sensor reads incorrectly Configuration error Check status of sensor reading for accuracy If reading is in error check for plugged sensing line and check sensor calibration Replace sensor if defective Check configuration for proper static pressure set point Also check SMG An improper SMG can cause the IGVs to be held closed Check status of IGV 5 STAT If IGVs are forced remove force and che
100. d in some cases master loop in tegral gain MIG To verify or adjust submaster default values perform the following for each controlled device control loop 1 2 Verify that controlled devices cooling coil valve CCV heating coil valve HCV are properly piped and wired Using the local interface device force each controlled device fully open and fully closed Make sure the ac tuators move smoothly Sticky or sloppy actuators result in poor control They must be corrected otherwise it may be impossible to obtain stable control Verify that all appropriate energy sources are available hot water chilled water steam etc Verify that the system is in the Occupied mode and the supply fan is running Verify that the supply fan status indicates ON If the fan status if OFF the control algorithms hold the controlled devices at the failsafe position Verify that all forces have been removed Table 24 indicates recommended starting values for SMG MPG and MIG for constant volume and variable air vol ume units Verify that these values have been entered Verify adjust the SMG If the SMG is too large the loop tends to oscillate hunt If it is too small the loop reacts too slowly Verify or adjust the SMG as follows a Using the local interface device force the submaster reference of the control loop to a value above or be low the actual sensor reading Verify that the actua tor responds co
101. d at only one point See Fig 69 If the communication bus cable exits from one building and enters another the shields must be connected to ground at the lightning suppressor in each building where the cable enters or exits the building one point only To connect the 39L or 39NX unit to the network proceed as follows Fig 69 1 Turn power to the PIC control box to OFF 2 Remove the COMMI plug from the processor module 3 Cutthe CCN wire and strip the ends of the RED WHITE and BLACK conductors 4 Using a wire nut connect the 2 drain wires together 5 Insert and secure the 2 RED wires to terminal 1 of the COMMI plug 6 Insert and secure the 2 WHITE wires to terminal 2 of the COMMI plug 7 Insert and secure the 2 BLACK wires to terminal 3 of the COMMI plug PROCESSOR MODULE Fig 68 CCN Sensor Plug and Communication Plug Locations OUTDOOR AIR THERMOSTAT Use field supplied 2 conductor 20 AWG wire to connect the thermostat to the DSIO and terminal block in the PIC control box See Fig 70 Connect one wire between the thermostat and J3 1 on the DSIO For 39NX units connect a second wire be tween the other thermostat terminal and TB3 9 TB2 10 for 39L units For 39NX units connect a third wire between J3 2 on the DSIO and 4 10 TB2 9 on 39L units CONTROL SYSTEM The control system consists of a processor module Fig 71 sensors and controlled devices Available options inc
102. d is a SPDT relay with silver cadmium ox ide contacts rated as follows 48 vaat 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor Fig 53 Wiring of Device Under Discrete Output Temperature Control H C c 4 D Field Wiring NOTE The relay furnished is a SPDT relay with silver cadmium ox ide contacts rated as follows 48 vaat 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor Fig 54 Wiring of Discrete Output Device Under Timeclock Control HUMIDIFICATION DEVICES Modulating Valve for Analog Output Humidity Control Fig 55 Valve selected must be able to receive a 4 to 20 mA signal and must NOT exceed an impedance of 600 ohms Valve power supply must be field installed and isolated Install valve on humidifier piping and connect actuator power supply Using a 20 AWG twisted wire pair connect the posi tive contact of the valve actuator to pin 40 of the option module Connect the negative contact of the valve ac tuator to pin 41 of the option module 59 GRD 1 lt 20 o OPTION MODULE Ei s EF ceu m 8 cr OOnPrjorrnp vzcr z
103. de NEC and all local re quirements The recommended wiring is as follows Dampers actuators 4 20 AWG cable and valves 2 twisted pairs unshielded Sensors 2 conductor 20 AWG cable one twisted pair unshielded Refer to Table 8 for recommended brands and part numbers Table 8 Recommended Sensor and Device Wiring PART NUMBER MANUFACTURER Plenum Alpha American A48301 Belden 88442 Columbia Manhattan M64430 Quabik Within a building NOTE Wiring is 20 gage 2 conductor twisted cable REMOTE LOCAL INTERFACE DEVICE HSIO When ordered as part of a 39L or 39NX unit the HSIO is factory installed and fully wired To reinstall the HSIO in a remote location away from the control box refer to the factory wiring connections in Fig 9 12 and proceed as follows 1 Use a 20 AWG 2 conductor twisted wire pair Belden No 8205 or equivalent to supply power to the HSIO mod ule Use a 20 AWG 3 conductor cable shielded with drain wire Belden No 8772 or equivalent for communication with the HSIO Cable length must not exceed 1000 ft 2 Pull the 2 cables power and signal through the electri cal conduit to the NEMA standard box or HSIO Leave approximately 4 ft of wire in the PIC control box for terminations 3 Route the cables from the PIC control box to the HSIO bracket Secure the HSIO cables to the existing cables using either tie wraps or by twisting the HSIO cabl
104. de airflow during Occupied periods the OAC control reads the outside air velocity pressure OAVP sensor compares its value to the OAVP set point and ad justs the mixed air dampers to the position required to achieve the configured velocity pressure If a control routine other than OAC or the configured minimum damper position require the dampers to be more fully open than the OAC setting that routine or position over rides the OAC control To protect against coil freeze up in colder climates the PIC provides selectable low tempera ture protection to limit the minimum mixed air temperature to approximately 45 F See Fig 79 for OAC control flowchart HEATING COIL CONTROL The heating coil control ad justs the steam or hot water valve Heat is primarily used for morning warm up or Occupied Heating with the valve modu lated to maintain desired return air temperature If the supply fan is OFF the heating valve is modulated to maintain a desired minimum duct temperature fan off value If the fan is ON the system determines if it is in the morn ing warm up mode If it is the return air sensor is read and compared to the Occupied Heating set point If heating is required the control calculates the supply air temperature required to satisfy conditions Once the required supply air temperature has been cal culated it is compared to the actual supply air temperature and the heating coil valve modulates to the required posi
105. de conditions are suitable for atmospheric cooling The control compares the outdoor air temperature to the space temperature If the outdoor air temperature is less than the space temperature the system does either an enthalpy check using an outside air enthalpy switch or a differential en thalpy check Return air temperature is compared to return air relative humidity for return air differential enthalpy Outside air temperature is compared to outside air relative humidity for outside air differential enthalpy The control then determines if the outdoor air tempera ture is below the Nighttime Free Cool Lockout NTLO If so the damper set point is changed to 1 0 degree less than the Occupied Cooling set point allowing the system to use return air during the heating mode If the outdoor air temperature is higher than 68 F the con trol sets the damper set point to 1 0 degree higher than the Occupied Heating set point to provide cooling allowing the system to use outside air If the outdoor air temperature is higher than NTLO but less than 68 F the system sets the damper set point halfway between the Occupied Heating and Occupied Cooling set points to provide ventilation If outside conditions are suitable the control compares the space temperature to the damper set point and computes the supply air temperature required to satisfy conditions Once the required supply air temperature has been cal culated it is compared to th
106. de the fan section for field installa tion Two types of sensors are supplied one sensor monitors the conditioned air space and the other sensor monitors the return air duct Both sensors use infrared technology to de tect the levels of CO present in the air Sensor descriptions and part numbers are shown in Table 6 To mount the sensor refer to the installation structions shipped with the sensor Table 6 CO Sensor Accessories CO SENSOR ACCESSORY PART NUMBERS DESCRIPTION CGCDXSEN001A00 Wall Mount Sensor No Display CGCDXSENO002A00 Wall Mount Sensor with Display CGCDXSENO003A00 Duct Mount Sensor No Display CGCDXGAS001 A00 Sensor Calibration Service Kit CGCDXPRMO001A00 User Interface Program UIP The CO sensors listed in Table 6 are all factory set for a range of 0 to 2000 ppm and a linear voltage output of 2 to 10 vdc Fig 40 shows ventilation rates for various CO set points when outside air with a typical CO level of 350 ppm is used to dilute the indoor air Refer to the instructions sup plied with the CO sensor for electrical requirements and terminal locations Any changes to the sensor s factory configuration require the purchase of the User Interface Program UIP or Sensor Calibration Service Kit which also contains the UIP To accurately monitor the quality of the air in the condi tioned air space locate the sensor near the return air grille so it senses the concentration of CO leaving the spa
107. e F5 Replace if necessary If fuse is intact check for proper connections Check transformer output Check status of sensor readings for accuracy Replace sensor if defective Check configuration for proper heating set point and Submaster Gain SMG An improper SMG can cause the heating valve to be held closed Check status of HCV 5 STAT If HCV is forced remove force and check operation Check status of sensor readings for accuracy Replace sensor if defective Configuration error No fan status Cooling coil valve CCV is forced closed No chilled water available No cooling No power to cooling coil valve Incorrect reading from space temperature sensor supply air temperature sensor or return air temperature sensor VAV units Configuration error Check configuration for proper heating set point and Submaster Gain SMG An improper SMG can cause the heating valve to be held open Check status of SFS 4 STAT If status is OFF check switch for proper operation Supply fan status switch must be ON for cooling coil to function properly Check status of CCV 5 STAT If CCV is forced remove force and check operation Check source of chilled water Correct any problems found Check for blown fuse F3 Replace if necessary If fuse is intact check for proper connections Check transformer output Check status of sensor readings for accuracy Replace sensor if defective Check configuration for
108. e Air OAC Control This fea ture ensures a continuous supply of outside air to the unit and occupied space The OAC control monitors the outside air velocity pressure OAVP with a probe and pressure trans ducer The pressure transducer is factory installed the probe 18 factory supplied for field installation in the outside air ducts See Fig 41 and 42 PROBE INSTALLATION Locate each probe in a straight portion of the outside air duct with any dampers elbows or fittings at least 2 diameters away The probe should be in a portion of the duct where the airflow is uniform so that the probe senses the average air velocity in the duct The probe must also be located so that measurements at the probe are not influenced by the opening or closing of the outdoor air dampers Install the probe at a 90 degree angle to the airflow and ensure that the holes in the probe are facing and in line with the airflow The probe tube that is closest to the incoming airflow measures velocity pressure the rear tube measures duct static pressure Use approved plenum tubing to connect the probe to the bulkhead fittings on top of the control box For runs up to 150 ft use 4 in OD tubing For runs over 150 ft use s in OD tubing Use at least 25 ft of tubing to prevent pulsations and erratic operation Coil any extra tub ing if necessary If the outside air duct is large additional probes can be installed in the duct and manifolded to obtain a more
109. e following example KEYBOARD ENTRY RESPONSE C SETPOINT JL 1115 COMMENTS System set points OHSP 68 0 Present occupied heat set point is 68 0 Key in 59 and press ENTR display shows new occupied heat set point is 59 Present occupied cooling set point is 78 0 Key in 70 and press ENTR display shows new occupied cooling set point is 70 OHSP 59 0 OCSP 78 0 OCSP 70 0 103 Unit is shipped with the NTFC Demand Limit Tem perature Reset Optimal Start Occupied Heating and Fan Tracking functions disabled If these functions are desired refer to Control Operation Programming Func tions section beginning on page 81 9 Check tightness of all electrical connections 10 Turn on control power by turning the ON OFF switch located in the PIC control box to ON 11 Perform Quick Test to make sure controls are operating properly See the following section Quick Test The Quick Test feature allows the service technician to individually test all inputs and outputs of the control system See Tables 18 22 The test function operates the Quick Test diagnostic pro gram The test subfunctions energize the valves dampers and inlet guide vanes VAV units To start Quick Test set HOA switch to OFF Verify sup ply fan stops Quick Test does not operate if supply fan sta tus is ON A test can be terminated by pressing Pressing af ter a test has started advances the system to the next test Once
110. e mixed air temperature sensor value if installed otherwise the supply air temperature sen sor determines the damper position The damper adjustment rate is limited to 596 per minute if the outside air tempera ture is less than 40 F This rate limit prevents nuisance low temperature thermostat tripping ELECTRIC HEATER CONTROL Electric heater stag ing regulates the electric heater The heater is staged to pre vent the space temperature from falling below the desired set point The number of heat stages is factory set for each unit s heater If the supply fan is OFF all stages of electric heat are turned off 99 If the fan is ON the control reads the space temperature sensor and calculates the supply air temperature required to satisfy conditions Once the required supply air temperature has been cal culated it is compared to the actual supply air temperature to determine the number of heat stages required to satisfy conditions The required stages are energized one at a time with 2 second intervals between stages ADAPTIVE OPTIMAL STOP Optimal stop allows the space temperature to drift to an expanded occupied set point dur ing the last portion of an occupied period The control cal culates a stop time offset which is the time in minutes prior to the scheduled unoccupied time during which expanded set points can be used Adaptive optimal stop utilizes space temperature an expanded Occupied set point and a K fac
111. e processor module is between 18 and 24 vac No fuses are blown connections are firmly in place If all of the preceding conditions exist and the module LEDs are not blinking the module needs to be replaced Before replacing a processor PSIO module store the con figuration data from the old module on hard copy The new processor module can be preconfigured or configured in the field After obtaining a new module field replace the inopera tive module as follows Turn off all power to the fan motor starter and PIC con trol box CAUTION To avoid electrical shock and equipment damage always disconnect all power to the control box be fore replacing PIC modules 2 Open the control box door 3 Refer to Fig 5 7 for control box component arrange ments Disengage all connectors from the module 4 Use a screwdriver to remove the mounting screw securing the module to the control box Remove the module 5 Install the replacement module and replace the mount ing screw 6 Reinstall all connectors Verify that each connector is in the correct location 7 Turn on the power to the PIC control box and motor starter 8 If you are replacing a PSIO master module that is not preconfigured use the local interface device HSIO or Building Supervisor to reset the date and time and change the module s default settings The original PSIO master module was factory configured to match the unit in which
112. e reset ratio The reset ratio is the degrees of change in supply air temperature per degree of space temperature change A reset limit specifies the maximum number of de grees the supply air temperature may be raised Both the re set ratio and the reset limits are user adjustable When the fan is ON and the system is in the Occupied mode the control reads the space temperature sensor and computes the reset value If the reset value is greater than the reset limit the control uses the reset limit as the reset value The modified supply air temperature set point is de termined by adding the reset value to the configured supply air temperature set point This value is then used by the cool ing coil algorithm TWO STEP DEMAND LIMITING Available on Units Connected to the Carrier Comfort Network Only If the Demand Limit option is enabled the control receives and accepts redline alerts and loadshed commands from the Net work Loadshed option See the CCN Loadshed manual for additional information When a redline alert is received the system limits the maxi mum volume percent of fully open IGVs per the user defined demand limit no 1 set point When a loadshed command is received the maximum vol ume is limited per the user defined demand limit no 2 set point The maximum loadshed timer prevents the system from remaining in Loadshed if the control loses communications with the Loadshed option If the timer expires before the
113. e temperature falls below the set point the unit is turned off Optimal Start 26 Indicates that the unit is operating in the Optimal Start mode and is trying to achieve the Occupied set point On VAV units this is referred to as morn ing warm up Unit must be configured for optimal start This mode is enabled by 5 ome Unoccupied Mode 27 Indicates that the unit is in the Unoccupied mode as determined by its time schedule In this mode the unit is turned off Optimal Stop 29 Indicates that the unit is being con trolled to its expanded Occupied set points The space tem perature is allowed to drift to its expanded Occupied set points during the last portion of the Occupied period Unit must be configured for Optimal Start 171 Optimal Stop mode is only applicable to CV units Occupied Heating 30 Indicates that the unit is in the Heating mode to satisfy its Occupied Heating set point Units must inp Occupied Heating is available on VAV units only be configured for Occupied Heating Example 2 Reading Current Operating Modes KEYBOARD DISPLAY ENTRY RESPONSE TUE 12 45 MODE 31 COMMENTS Keyboard has not been used for at least 10 min utes alternating summary display appears on screen Modes subfunction of MODE status function 31 Mode 31 is in effect OCCUPIED COOLING Explanation of code 31 MODE 22 DEMAND LIMIT NOTE The first mode
114. e this feature by forcing the value 82 SERVICE SUBFUNCTION NUMBER 13 14 15 16 17 18 20 21 22 23 24 26 LEGEND Table 16 Service Configuration Ranges and Defaults cont CONFIGURATION VALUE RANGE Night Purge Duration minutes to 240 Night Purge Low Temperature Damper Position output to 100 Night Purge High Temperature Damper Position output to 100 Constant Outside Air Master Proportional Gain Constant Outside Air Master Integral Gain Constant Outside Air Master Derivative Gain Constant Outside Air Submaster Gain OAVP Sensor Low Voltage Point OAVP Sensor High Voltage Point OAVP Sensor Low Voltage Reference OAVP Sensor High Voltage Reference OAVP Sensor Probe Multiplier Factor Air Quality Sensor 1 Master Proportional Gain Air Quality Sensor 1 Master Integral Gain Air Quality Sensor 1 Maximum Damper Position 956 Air Quality Sensor 1 Low Voltage Point Air Quality Sensor 1 High Voltage Point Air Quality Sensor 1 Low Voltage Reference Air Quality Sensor 1 High Voltage Reference Air Quality Sensor 2 Master Proportional Gain Air Quality Sensor 2 Master Integral Gain Air Quality Sensor 2 Maximum Damper Position 96 Air Quality Sensor 2 Low Voltage Point Air Quality Sensor 2 High Voltage Point Air Quality Sensor 2 Low Voltage Reference Air Quality Sensor 2 High Voltage Reference Building Factor 96 24 hour Unoccupied Factor Set Point Bias F Maxi
115. em element communication connector must be wired to the positive pins of the system element on either side of it the negative pins must be wired to the negative pins the sig nal ground pins must be wired to signal ground pins See Fig 68 for location of the CCN communication plug COMM1 on the processor module NOTE Conductors and drain wire must be 20 AWG mini mum stranded tinned copper Individual conductors must be insulated with PVC PVC nylon vinyl Teflon or polyeth ylene An aluminum polyester 100 foil shield and an outer jacket of PVC PVC nylon chrome vinyl or Teflon with a minimum operating temperature range of 20 C to 60 C is required See Table below for cables that meet the requirements MANUFACTURER CABLE NO Alpha 2413 or 5463 American A22503 Belden 8772 Columbia 02525 When connecting the CCN communication bus to a sys tem element a color code system for the entire network is recommended to simplify installation and checkout The fol lowing color code is recommended 64 SIGNAL CCN BUS CONDUCTOR COMM 1 PLUG TYPE INSULATION COLOR PIN NO RED 1 Ground WHITE 2 BLACK 3 If a cable with a different color scheme is selected a simi lar color code should be adopted for the entire network At each system element the shields of its communication bus cables must be tied together If the communication bus is entirely within one building the resulting continuous shield must be connected to groun
116. en sor junction box 2 Wrap the element around a 4 in PVC pipe cut holes near the center of the duct on both sides and feed the pipe with sensor element through the hole 3 Secure the seal around the PVC pipe NOTE If local codes do not permit the use of PVC use EMT instead Refer to Field Wiring Connections section page 52 for wiring instructions and details See Table 5 for RTD resis tance vs temperature values Table 5 RTD Resistance vs Temperature Values for Mixed Air Temperature Sensor RESISTANCE TEMP RESISTANCE TEMP RESISTANCE TEMP Ohms F Ohms F Ohms F 50 60 693 140 719 150 745 160 772 170 799 180 827 190 854 200 883 912 Enthalpy Switch Fig 23 The enthalpy switch and mounting template are located in a box shipped inside the fan section The enthalpy switch is normally mounted in a horizontal position with the sensing element exposed to freely circu lating outdoor air CAUTION DO NOT install enthalpy switch in locations where ex cessive moisture corrosive fumes and or vibration are present FIELD SUPPLIED PLASTIC SPACER CLAMP AND S SCREWS ELEMENT EXISTING SUPPORT STRUCTURE FILTER LINK COIL DETAIL A SEE DETAIL A Fig 21 Mixed Air Temperature Sensor P N HH79NZ021 Installation 3 4 PVC COPPER SENSOR SUPPORT 21 2 RADIUS TIE WRAP MIN PUNCH LOO DIA HOLE DETAIL B FOR SENSOR
117. en the smoke purge mode is energized the supply fan starts the return fan starts the outside air and exhaust air dampers open and the return air dampers close This mode remains in effect as long as the input signal is maintained at the fire system panel An alarm is generated from this input and sent to the Building Supervisor In order for this mode to be initiated the input signal must be main tained for no less than 2 seconds ADAPTIVE OPTIMAL START Optimal Start is used to heat up or cool down the space prior to occupancy The pur pose is to have the space temperature approach and then achieve the occupied set point by time of occupancy The control uses outdoor air temperature space temperature occupied 96 set point and a factor in minutes degrees to calculate a start time offset which is the time in minutes that the system should be started in advance of the occupied time The con trol monitors its results and adjusts the K factor to assure that the Occupied set point is achieved at time of occupancy Constant Volume Units Only HEATING COIL CONTROL The heating coil control ad justs the steam or hot water valve The valve is modulated to prevent the space temperature from falling below the de sired set point If the supply fan is OFF the heating valve is modulated to maintain a desired minimum duct temperature fan off value If the fan is ON the system reads the space sensor and computes the su
118. er option module PSIO slave and relay module DSIO all perform continuous diagnostic evaluations of the condition of the hard ware Proper operation of these modules is indicated by LEDs light emitting diodes PSIO LEDs are located on the top of the module and the DSIO LEDs are on the front of the module See Fig 83 RED STATUS LED If the LED is blinking continuously at a one second rate the module is operating normally If the LED is lighted continuously there is a problem that may re quire replacement of the module If the red LED is off continuously check the power sup ply to the module If there is no input power check the fuses If a fuse is blown check for shorted wiring or for a non functional module If the fuses are not blown check for a bad transformer or open secondary of the transformer GREEN COMMUNICATIONS LEDs On a PSIO mod ule the green LED closest to the COMM connectors indi cates the status of communications between modules When used the other green LED on the module indicates the status of external CCN communications The green LED that indicates module communications should blink continuously whenever the power is on If the green LED is not blinking check the red LED If the red LED is normal check the module address switches as shown in Fig 82 The correct addresses follow Processor Module PSIO Master 01 factory default Option Module PSIO Slave 31 High Voltage
119. es around the existing cables Strip back the jacket 6 in on each cable after cutting off the excess Connect the power cable at the PIC control box to the existing 3 pin connector hang ing at the HSIO bracket The wires should be terminated in the screw type locking clamps on Terminals 1 and 2 4 Connect the signal cable at the PIC control box to the existing 4 pin communications connector hanging at the HSIO bracket The wires should be terminated in the lock ing clamps on Terminals 1 2 and 3 The shield should be terminated at the HSIO bracket ground Be sure to note the color coding used on the cable for later reference when terminating the other end of the cable 5 At the NEMA standard box or HSIO connect the power conductors to Pin 1 and 2 of the 3 pin plug Using the color coding from the above step connect the signal cable to Pin 1 Pin 2 and Pin 3 of the 4 pin communications connector Remove the shield and drain wire from this end of the cable 6 After the HSIO is installed inside the remote cover con nect the 4 pin and 3 pin plugs to the HSIO RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR TEMPERATURE SENSOR ENTHALPY SWITCH AND MIXED AIR TEMPERATURE SENSOR Wires are to be connected to the proper terminals on the processor mod ule See Fig 44 for details 52 Select a 20 AWG twisted pair no shield cable Connect as per table below PROCESSOR SENSOR MODULE PIN NO Return air temperature sensor RAT
120. et point or rises above the unoccupied cooling set point the supply fan en ergizes and runs until the space temperature returns to within the required limits The supply fan can also run between the hours of 3 00 am and 7 00 am when the unit is in the Nighttime Free Cooling mode to pre cool the space prior to the Occupied period Constant volume units that are subject to demand limiting stop the supply fan whenever a loadshed command is re ceived from the CCN Loadshed option The supply fan re mains OFF until the loadshed command is cleared or the in ternal maximum loadshed timer expires NIGHTTIME FREE COOL NTFC Nighttime free cool ing is used to start the supply fan to precool the building s interior using outside air This delays the need for mechani cal cooling when the system enters the Occupied mode The system determines if the outside conditions tempera ture and enthalpy are suitable for outside cooling If so the supply fan is energized and the dampers modulate open Once the space has been sufficiently cooled the fan stops If the outside air conditions are not suitable the fan remains OFF The unit must have mixed air dampers to operate NTFC 92 NTFC is scheduled to run only between the hours of 3 00 am and 7 00 am NIGHT PURGE During the unoccupied period this fea ture starts the fans and opens the mixed air dampers to re move stagnant air and airborne pollutants from the building space If
121. eyboard is not used for 10 minutes the display TO EOS OFF returns to the rotating default display Press 5 and LOG OFF Ready for operator to log off 5 Logged off password to exit Quick Test and then press to restart the test LOGD OFF protection enabled procedure 81 Table 16 Service Configuration Ranges and Defaults SERVICE FACTORY SUBFUNCTION CONFIGURATION VALUE DEFAULT NUMBER VALUE Unit 0 1 0 1 0 Cooling 0 none 1 chilled water coil 2 DX 0102 1 DX Cooling Stages 0108 2 Heating Type 0 none 1 hot water steam coil 0 to 2 1 2 electric heater Electric Heater Stages 0108 0 3 Mixed Air Dampers 0 none 1 analog 2 2 position 0102 4 Indoor Air Quality Type 1 single gas 2 differential 2 gases 1 2 1 Mixed Air Temperature Protection Yes No Yes Bus Number 0 to 239 0 Element Address 0 to 239 1 Password 0 to 9999 1111 4 English Metric System 0 English 1 Metric 0 1 0 Nighttime Free Cooling Enabled Disabled Disabled Humidity Control 0 none 1 analog 2 discrete 0102 0 Occupied Heating Enabled Disabled Disabled Space Temperature Reset Enabled Disabled Disabled Demand Limit Enabled Disabled Disabled Fan Tracking Enabled Disabled Disabled 5 Constant Outside Air Enabled Disabled Disabled Night Purge Enabled Disabled Disabled Indoor Air Quality Enabled Disabled Disabled Indoor Air Quality Priority Level high 1 low 2 none 3 11
122. f the test Table 21 If unit does not have an Option Module or electric heater proceed as follows Test is now complete The unit is back under normal automatic control If so equipped verify that the outdoor air damper returns to its 0 position Verify that the IGVs stroke to their 100 position Close the door of the fan section Turn the switch to AUTO The IGVs return to their 096 position The supply fan is turned ON automatically The supply fan stops Using an ohmmeter across the HIR relay contacts refer to component arrangement label for location the reading should be less than 10 ohms If the unit is equipped with the option module proceed with the option output portion of the test Table 20 If unit does not have an option module proceed to the electric heater portion of the test Table 21 If unit does not have an option module or electric heater proceed as follows Test is now complete The unit is back under normal automatic control 106 KEYBOARD ENTRY 2 8 i m m o A KEYBOARD ENTRY DISPLAY RESPONSE RFVC X RFVCTEST HUM1 96 HUM1TEST HUM 96 HUM2TEST AOTC AOTCTEST DOTC X DOTCTEST DTCC X DTCCTEST EXIT TST TST CMPL Table 20 Test of Output Options Using Option Module COMMENTS ACTION Verify that the return fan IGVs stroke to their fully open position The return fan IGVs should close Verify that the return fan IGVs if so equipped retur
123. gative wire to pin 32 of the processor module Return Air or Space Relative Humidity Transmitter Connect the positive wire to pin 10 of the processor mod ule Connect the negative wire to pin 11 of the processor module See Fig 61 RETURN AIR RELATIVE HUMIDITY TRANSMITTER RETURN FAN Z gt EXHAUST FIELD SUPPLIED 24 VAC POWER TO TRANSMITTERS 24 VAC POWER TO TRANSMITTERS OUTDOORAIR 39L OR PIC SECTION RELATIVE DUCT 39NX UNIT HUMIDITY TRANSMITTER Fig 58 Field Installed Relative Humidity Transmitters SUPPLIED POWER SIGNAL TERMINAL TERMINAL ISOLATED 7 BLOCK BLOCK 24 VAC POWER PROCESSOR MODULE TO FIELD SUPPLIED TO ISOLATED PROCESSOR 24VAC MODULE POWER Field Wiring Fig 59 Duct Mounted Relative Humidity Transmitter Wiring FIELD SUPPLIED ISOLATED 24 vac POWER 20 va MINIMUM SPACE RH OR RETURN RH OUTDOOR RH LEGEND RH Relative Humidity Field Wiring RH SENSING ELEMENT Fig 60 Wall Mounted Relative Humidity Transmitter Wiring PROCESSOR MODULE PROCESSOR MODULE Fig 61 Wiring of Relative Humidity Transmitters 61 AIR QUALITY SENSOR Air quality AQ sensors are CO sensors shipped inside the fan section for field instal lation To wire the sensors after they are mounted in the con ditioned air space and return air duct see Fig 62 and the instruc
124. gh Pressure Switch Fig 38 The high pressure switch HPS is factory installed in the PIC control box on units only It is a snap acting SPDT switch with manual reset that is used to shut down the supply fan when ever the duct pressure reaches the switch setting The manual reset is used to restart the fan after the problem has been corrected The switch is factory set at 3 0 in wg It has a range of 1 4 to 5 5 in wg and can be field adjusted for specific applications Adjust the high pressure switch setting as follows 1 Loosen conduit enclosure retaining screw pull firmly on the bottom end and snap off cover 2 Raise set point by turning slotted adjustment screw located at top of range spring housing clockwise Turn adjustment screw counterclockwise to lower set point SET POINT ADJUSTMENT SCREW SNAP ON COVER SCREW TYPE ELECTRICAL CONNECTIONS RANGE SPRING CONDUIT ENCLOSURE 1 2 CONDUIT CONNECTION CONDUIT ENCLOSURE RETAINING SCREW Fig 38 High Pressure Switch P N HH02WCO001 3 To change or check calibration use a T assembly with 3 rubber tubing leads Attach one lead to the HPS and another to an accurate manometer with the appropriate range Apply pressure through the third lead and ap proach set point slowly 4 Adjust set point to at least 0 5 in wg greater than con figured static pressure set point Air Quality Sensors Fig 39 The air quality AQ sensors are shipped insi
125. h the actual temperature measured Verify that the return velocity pressure is 0 with the return fan OFF Verify that the supply velocity pressure is 0 with the supply fan OFF Verify that the duct high humidity switch reads Normal when the adjustment knob is set to the maximum set point or contacts are open Verify that it reads ALM when contacts are shorted At Terminal Block 3 short Terminals 5 and 8 Verify that the display changes to EVAC ALM Verify the following Supply fan is OFF Outside and return dampers if applicable close Exhaust damper if applicable opens Return fan starts Supply fan inlet guide vanes close VAV units only Return fan inlet guide vanes open VAV units equipped with return fans Heat interlock Relay is OFF VAV units At Terminal Block 3 short Terminals 3 and 8 Verify that the display changes to PRES ALM Verify the following Supply fan is ON Outside air damper if applicable opens Exhaust and return dampers if applicable close Return fan stops Supply fan inlet guide vanes open VAV units Return fan IGVs close VAV units equipped with return fan Heat Interlock Relay is ON VAV units At Terminal Block 3 short Terminals 4 and 8 Verify that the display changes to PURG ALM Verify the following Supply fan is ON Outside air and exhaust dampers if applicable open Return damper if applicable closes Return fan is ON Supply fan IGV
126. has not been used for at least 10 minutes alternating MODE 23 summary display appears on 3 ALARMS screen 3 ALARMS 3 alarms detected ALARM 71 First alarm code Explanation of alarm code LOW LIMIT ALARM 76 Second alarm code Explanation of alarm code HIGH LIMIT ALARM 83 Third alarm code RELATIVE HUMIDITY Explanation of alarm code LOW LIMIT 78 The modes are explained below Temperature Reset 21 Indicates that the unit is using temperature reset to adjust the supply air set point The set point is modified based on space temperature VAV units only Unit must be configured for space temperature reset 1 8 This mode is enabled by Demand Limit 22 On CV constant volume units this mode indicates that the fan is being held off by the De mand Limit option On VAV units it indicates that the max imum IGV position is being limited by the Demand Limit option Units must be configured for demand limiting Edie This mode is enabled by s and is only available on units connected to the Carrier Comfort Network CCN Unoccupied Heating 23 Indicates that the space tem perature is below the Unoccupied Heating set point and the unit is on When the space temperature rises above the set point the unit is turned off Unoccupied Cooling 24 Indicates that the space tem perature is above the Unoccupied Cooling set point and the unit is on When the spac
127. he air within the occupied space The use of a junction box to accommodate the wiring is recommended for installation The sensor may be mounted directly on the wall if acceptable by local codes CLEARANCE HOLE FOR 2 8 SCREWS DO NOT mount the sensor in drafty areas such as near heating or air conditioning ducts open windows fans or over heat sources such as baseboard heaters or radiators Sensors mounted in those areas will produce inaccurate readings Avoid corner locations Allow at least 3 ft between the sensor and any corner Airflow near corners tends to be re duced resulting in erratic sensor readings Sensor should be vertically mounted approximately 5 ft up from the floor beside the space temperature sensor Install the sensor using 2 screws and 2 hollow wall an chors if required do not overtighten screws See Fig 31 Sensor must be mounted with terminals ACIN and OUT located at the top of the sensor as shown in Fig 32 For distances up to 500 ft use 4 conductor 20 AWG cable 2 twisted pairs no shield to connect the sensor to the PIC control box terminals and power supply Refer to Field Wiring Connections section page 52 for wiring instructions and details The PIC controller has a space relative humidity default Fig 31 Wall Mounted Relative Humidity set point of 4090 Sensor Installation CAUTION Never attempt to clean or touch the sensing element with MOUNTING chemical solvents as permane
128. he output values mined value or status The forced value overrides the value that the control system actually reads This permits opera Example 4 Forcing An Output Value tion in the event of a faulty sensor KEYBOARD COMMENTS To read a sensor enter 24 then scroll to the de ENTRY RESPONSE 5 OUTPUTS System Outputs sired sensor reading using the key To force an input Scroll past see Example 3 Table 13 shows the order of the readouts IGV X Inlet guide vanes Example 3 Forcing An Input Value MIXD X Mixed dir damper n LJ KES COMMENTS HCV X Heating coil valve 24 INPUTS System inputs LJ Scroll past CCV X Cooling coil valve SF OFF Supply fan off SPT X Space temperature Supply fan forced ON NOTE Supply fan forced SAT X Supply air temperature L SF ON FORCED value toggles between value SF ON and word FORCED Return air temperature m Supply fan forced value re MAT X Mixed air temperature moved Display no longer flashes 60 Outside air temperature HISTORY FUNCTION Outside air temperature value 1 be Displays the 9 latest alarms generated by the s e OAT 80 FORCED Valid unit in the order of their occurrence If 9 alarms are dis and word forced played the occurrence of a 10th alarm shifts the first alarm Outside air temperature off the display 60 forced value removed gt 1 ERG
129. ing the subfunction number and the func tion name key 69 KEYBOARD DISPLAY DESCRIPTION ENTRY SETPOINT 5 System set points OHSP X OCSP X UHSP X UCSP X Occupied heating set point Occupied cooling set point Unoccupied heating set point Unoccupied cooling set point o m 4 DEMAND Demand limit set points Time of day and day of week display TIME o m 4 DAYLIGHT Daylight savings time HOLIDAY o m 4 Holiday display SETPOINT System set points z 1 X ALARMS X alarms detected SETPOINT Current operating set points Table 13 Keyboard Directory STATUS STATUS Keyboard Entry Description Keyboard Entry Description a ALARMS Current alarm display 2 Current operating modes ALARM X 1st alarm 1 ALARM X 2nd alarm Mode 2 ALARM X 3rd alarm SETPOINT Current operating set points ALARM X 4th alarm OHSP X Occupied heating set point ALARM X 5th alarm OCSP X Occupied cooling set point ALARM X 6th alarm UHSP X Unoccupied heating set point ALARM X 7th alarm UCSP X Unoccupied cooling set point ALARM X 8th alarm SPSP X Static pressure set point ALARM X 9th alarm SASP X Supply air set point ALARM X 10th alarm CFSP X Delta CFM set point ALARM X 11th alarm HUSP X Humidity set point ALARM X 12th alarm AOSP X Analog temperature control set point ALARM X 13th alarm DOSP X Discrete temperature control set point ALARM X 14th ala
130. ions Table 19 105 KEYBOARD ENTRY Y DISPLAY RESPONSE OUTPUTS 96 TEST CCV TEST MIXD 96 MIXD TEST For Constant Volume Units i m o A For Variable Air Volume Units i m a A IGV 96 SF X FAN TEST EXIT TST TST CMPL IGV IGV TEST SF X FAN TEST HIR X HIR TEST EXIT TST TST CMPL Table 19 Test of Output Signals COMMENTS ACTION Field testing of outputs Set HOA switch to OFF Press ENTR if unit is equipped with a hot water or steam valve Otherwise press Verify that the hot water or steam valve strokes to its 100 position The hot water or steam valve returns to its 0 position Press ENTR if unit is equipped with a chilled water valve Otherwise press Verify that the chilled water valve strokes to its 100 position The chilled water valve returns to its 0 position Press ENTR if unit is equipped with mixed air dampers Otherwise press Verify that the outdoor air damper strokes to its 100 position Proceed with the applicable Constant Volume or Variable Air Volume portion of the test If so equipped verify that the outdoor air damper returns to its 0 position Set the HOA switch to AUTO Supply fan will be turned ON automatically If unit is equipped with the Option Module proceed with the Option Output portion of the test Table 20 If the unit does not have an Option Module proceed to the electric heater portion o
131. ipped separately for remote mounting with out a PIC section For the remote control box option all con nections from the control box to the unit are made to a junc tion box in the unit s fan section The control box includes electronic modules fuses re lays transformers terminal blocks low limit air tempera ture protection optional static pressure transducer VAV Variable Air Volume units only and high pressure switch VAV units An ON OFF switch is included to shut off the power to the control box PIC environmental limitations are as follows Shipping Temperature 20 to 165 Shipping Humidity 10 to 9596 Operating Temperature 32 to 125 F Operating Humidity 30 to 9096 INSTALLATION Follow all basic installation instructions for 39L 39 units as described in the 39L or 39NX Installation Start Up and Service Instructions shipped with the unit To verify the PIC and PIC option configurations according to the model numbers see Fig 1 and 2 Leave protective coverings on the unit until it is installed inside and protected from the elements construction debris and dirt Use one of the keys provided in the 39L or 39NX instal lation packet located in fan section to open the control box door Visually inspect all components and wiring for any dam age Remove the valve assembly packages and the sensor packages from the fan section For units with PIC sections remove protective plastic ca
132. is the primary operating mode The second mode is the secondary operating mode if applicable Mode 22 is in effect Explanation of code 22 Occupied Cooling 31 Indicates that the unit is in the Cooling mode to satisfy its Occupied Cooling set point Occupied Fan Only 32 Indicates that the unit is main taining set point by using a mixture of outside and return air only No mechanical heating or cooling is being used Nighttime Free Cooling 33 Indicates that the supply fan is on and using outside air to precool the space served by the unit Unit must be configured for nighttime free cool ing This mode is enabled by 5 Smoke Pressurization 34 Indicates that the unit is in the Pressurization mode This mode is issued from the fire system panel Refer to Table 15 for the state of the items controlled Smoke Evacuation 35 Indicates that the unit is in the Smoke Evacuation mode This mode is issued from the system panel Refer to Table 15 for the state of the items controlled Smoke Purge 36 Indicates that the unit is in the Smoke Purge mode This mode is issued from the fire system panel Refer to Table 15 for the state of the items controlled Fire Shutdown 37 Indicates that the unit is in the Fire Shutdown mode This mode is issued from the fire system panel or local smoke detector Refer to Table 15 for the state of the items controlled Quick Test 38 Indicates th
133. istances up to 500 ft use 2 conductor 20 AWG cable to connect the sensor to the PIC control box terminals Refer to Field Wiring Connections section page 32 for further de tails See Table 3 for thermistor resistance vs temperature values Fig 25 Supply Return Air Temperature Sensor P N HH79NZ019 FOAM GASKET JUNCTION BOX FORM 5 16 HOLE ON CENTER LINE OF DUCT 2 EA IO x I LONG SHEET METAL SCREWS PROBE LENGTH d 6 OR 18 2 EA 6 32 x3 8 LONG MACHINE SCREWS 2 DUCT WIRENUTS COVER PLATE CONTRACTOR WIRING DRILL OR PUNCH 2 HOLES THROUGH GASKET INTO DUCT FOR 10 SHEET METAL SCREWS Fig 26 Return Air Temperature Sensor Installation Heat Interlock Relay Fig 27 The heat interlock relay HIR is factory wired and installed on VAV units only It is a single pole double throw SPDT relay that provides normally open and normally closed contacts to interface with air terminal units It allows the air terminals to open when the PIC unit goes into the heating mode The contacts are silver cadmium oxide and are rated as follows 48 vaat 24 vac and 25 power factor 125 va at 115 vac and 25 power factor 125 va at 230 vac and 25 power factor The contact terminations are no 6 screw terminals NOTE The HIR is not used in digital air volume control DAV applications e 9 2 Fig 27 Relay P N 5
134. l CANN iV3H 38d 61 e 22 04 32 1011002 Jld XNGE pue 166 HUN 21 614 cm ans 5 So GE as e RR GD 0154 LEHI 2174 ENS BAVIS 2 3 3491 tsd 722 qi 225 lt Gk etd 9 tind LES 883 rs BIS s qn D ona 5 mm gt OE 9 v TR 9845 21718 NV 32 C28 038 4 6 eth IWS 0159 2 gt 438 ree Naa m AS 20 ET p 978 E HD Gerig 6 1 518 13534 117 Nag 334 r NE 2 38 54 281 vi COE eee 19 279 15114 og E 0159 gt 6 ms gt a 38 87 E ars cot 7 457 4302 6 eal EY Ze NEA pie Cn 438 ar Ue E Tenn zu i ong Ey GS 2 pje 947 quy 0158 1 ou eat asd 69 02 2 5 _ MA iHi Sit 5 0154 S NYAL 33 FIELD INSTALLED CONNECTIONS PSIO SLAVE ADDRESS 31 MJS FIELD 4 amp 4 PSIU COMMUNICATION 3 amp 4 Lies CONNECTIONS 02 46
135. l milliamp meter to verify the mA signal and proper polarity at the input signal leads RED and GREEN A digital volt meter with a minimum of 2 place accuracy may be used to determine signal value see Table 23 3 Enter the heating coil valve or cooling coil valve Quick Test retract the actuator shaft and completely lift valve stem 4 While still in Quick Test press The actuator shaft should extend completely pushing valve stem down Exit Quick Test procedure 108 Entering field test DX cooling coil Set the HOA switch to AUTO The fan starts If fan has IGVs the IGVs open to 30 After an 11 second delay the 1st stage of DX cooling The 1st stage of DX cooling is turned OFF After a 2 second delay the 2nd stage of DX cooling is turned ON The 2nd stage of DX cooling is turned OFF After a 2 second delay the 3rd stage of DX cooling is turned ON The 3rd stage of DX cooling is turned OFF After a 2 second delay the 4th stage of DX cooling is turned ON The 4th stage of DX cooling is turned OFF After a 2 second delay the 5th stage of DX cooling is turned ON The 5th stage of DX cooling is turned OFF After a 2 second delay the 6th stage of DX cooling is turned ON The 6th stage of DX cooling is turned OFF After a 2 second delay the 7th stage of DX cooling is turned ON The 7th stage of DX cooling is turned OFF After a 2 second delay the 8th stage of DX cooling is turned ON The fan and preceding DX c
136. l reads one state When no power is applied across the terminals the channel reads the opposite state IMPORTANT The 24 vac inputs on J3 of the DSIO module are polarized with one side tied to earth ground The grounded side of the signal must be connected to the even number pins Terminal strips J4 and J5 are internal relays whose coils are powered on and off by a signal from the microprocessor The relays switch the circuit to which they are connected Only Class II power should be applied to these connections IMPORTANT Use only the normally open contacts on DSIO modules These contacts have internal snub bers that protect the control modules from destructive arcing produced by switching inductive loads NEVER use the normally closed contacts DSIO DX IN 39 SERIES AHU CONTROL BOX 87 E T8 A TO TB2 10 SSSSSSSSSSP N GN 0 N Z gt 77 sts 2 2 CUST INPUT 5 EQUIVALENT LOAD 7 Z2ZZZZ2ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ2ZZ2Z2Z72Z2ZZ NSNSSSSSSSSNSSSSSSSSSSSSSSSSSSNSSSSSARASSSSSSSSSSSSSSSSSSSSSSSSSSNSSSNSSSSSSSSSSSSSSSSSSSSSSSSSASSSSSSSSSSSSSSSSSNSSSNSSN lt FOR 391 22227222222222222222222217222272222222227272722272222222222222272222222222222222222222222222772222222 f aaaanann CA HU CONTROL BOX FOR 39L CONNECT AIR THERMOSTAT 1 27 DLL OUTDOOR gt LEGEN
137. l signal 4 to 20 mA is be ing sent to the actuator Refer to wiring diagram for appropriate terminals Using Control Loop Checkout procedure page 108 adjust the SMG until the output steadies Verify sensor reading If reading is fluctuating determine cause i e loose connections partially plugged static pres sure sensing lines Correct or replace sensor if necessary Verify all connections are secure Voltage type sensors i e static pressure space tempera ture outdoor air temperature return air temperature rela tive humidity and velocity pressure can be calibrated using manufacturer s instructions If a sensor cannot be calibrated and its reading is consid ered unacceptable replace sensor Once sensor is re placed verify new sensor is reading correctly PROBLEM Constant outside air OAC malfunctioning Indoor air quality IAQ features malfunctioning UNIT TROUBLESHOOTING cont POSSIBLE CAUSE OAC not enabled Fan status is OFF According to occupancy schedule building is unoccupied Incorrect unit type Outside air velocity pressure OAVP sensor not functioning OAVP sensor not configured OAVP value does not match that of measure ment equipment IAQ not enabled According to occupancy schedule building is unoccupied IAQ priority level is incorrect Set point too high Air quality AQ sensors not operating AQ sensors not configured IAQ type set incorrectly CO
138. lead to pin 47 on the processor module i i Li Hot Water Valves Fig 15 Using 4 conductor 20 AWG Duct Static Pressure Probe VAV Units The cable two twisted pairs no shield connect the hot water 5 valve actuator 3s follows duct static pressure probe is shipped inside the control box 1 Using twist on wire connectors connect the BLACK and Select a location in the ductwork where the static pressure WHITE BLUE leads inside junction box to will be representative of the static pressure to be monitored the 24 vac power wires of the cable Connect the other and maintained typically 2 3 of the distance down the duct ends of the power wires to TB2 pins 11 and 12 in the from the fan Install the probe with the tip facing the air PIC control box flow See Fig 17 Use OD approved polyethylene tubing for up to 2 Using twist on wire connectors connect the RED 4 and pp po yey 5 GREEN leads inside the actuator junction 50 ft OD for 50 to 100 ft iu the probe to the other 2 wires in the cable Note the polarity of each wire 39L or 39NX unit Route the tubing back to the mechanical Be room and connect the tubing to the bulkhead fitting labelled 3 Connect the positive signal wire connected to the RED located on the bottom edge of the 39L control lead to pin 43 on the processor module Connect the nega box or top edge of the 39NX control box
139. lly adjusts a 2 stage humidifier The humidifier is controlled to maintain a desired space or return air humidity depending on whether a wall mounted or duct mounted humidity transmitter is used The first stage of humidification energizes the humidifier spray pump if applicable along with the first stage of the humidifier The second stage of humidification energizes the second stage of the humidifier A duct high humidity switch is also monitored and pro vides a user adjustable duct high humidity limit safety If the fan status is ON and the unit is in the Occupied mode the control reads the space or return air humidity sen sor If the humidity is 290 less than the humidity set point the first stage is turned ON If the humidity is 5 less than the humidity set point both stages are turned ON As the humidity increases the stages are turned OFF as follows When the humidity is within 290 of the set point the second stage of the humidifier is turned OFF When the humidity is greater than or equal to the set point both stages are turned OFF If the high humidity switch is tripped all stages of the humidifier are turned OFF INDOOR AIR QUALITY IAQ This function main tains the correct occupied ventilation rate using CO as an indicator of occupancy level or controls the levels of volatile organic compounds VOCs or other indoor air pollutants by modulating the mixed air dampers Varying quantities of out door air are
140. lude a processor option module Fig 71 relay modules Fig 72 and local interface device GROUND DRAIN WIRE DRAIN WIRE BLACK BLACK COMM PLUG PLUG 21 LA COMM 1 ekl AIR HANDLER UNIT AHU AIR HANDLER UNIT AHU DRAIN WIRE COMM PLUG AIR HANDLER UNIT AHU FT MAXIMUM DRAIN WIRE DRAIN WIRE AIR HANDLER UNIT AHU Fig 69 CCN Communication Wiring system software and operating intelligence is in the processor PSIO master module which controls the unit This module monitors and controls conditions through input and output ports and through the option PSIO slave and relay DSIO modules The machine operator communicates with the PSIO mas ter through the local interface device HSIO Communica tions between the PSIO and other modules is accomplished by a 3 wire sensor bus that runs in parallel between mod ules See Fig 73 On the sensor bus terminal strips terminal 1 of the PSIO module is connected to terminal 1 of each of the other mod ules see Fig 73 Terminals 2 and 3 are connected in the same manner If a terminal 2 wire is connected to terminal 1 the system does not work The PSIO master and slave and DSIO are all powered from a 2 vac power source connected to terminals 1 and 2 of the power input connector on each module Refer to the 39L or 39NX unit wiring diagram for transformer locations and wiring
141. mperature Low Alarm Limit F Mixed Air Temperature High Alarm Limit F Relative Humidity Low Alarm Limit Relative Humidity High Alarm Limit Outside Air Relative Humidity Low Alarm Limit Outside Air Relative Humidity High Alarm Limit Static Pressure Low Alarm Limit in wg Static Pressure High Alarm Limit in wg Supply Velocity Low Alarm Limit in wg Supply Velocity High Alarm Limit in wg Return Velocity Low Alarm Limit in wg Return Velocity High Alarm Limit in wg Delta CFM x 100 CCFM Low Alarm Limit Delta CFM x 100 CCFM High Alarm Limit Air Quality Sensor 1 High Alarm Limit ppm Air Quality Sensor 2 High Alarm Limit ppm Preheat Coil AOTC Master Proportional Gain Preheat Coil AOTC Master Integral Gain Preheat Coil AOTC Master Derivative Gain Preheat Coil AOTC Submaster Gain Preheat Submaster Center Value 95 Preheat Coil AOTC Fan Off Value F Preheat Coil AOTC Sensor Discrete Temperature Control Sensor Discrete Temperature Control Logic Discrete Temperature Control Hysteresis F Service Maintenance Limits hours x 1000 Service Maintenance Elapsed Hours hours x 1000 AOTC Analog Output Temperature Control OAVP Outside Air Velocity Pressure 83 FACTORY DEFAULT VALUE ool ANSON 2 Used to verify software version Used to verify and change factory configura tion Requires pa
142. mum Allowable Stop Time Supply Velocity Upper Limit in wg Return Velocity Upper Limit in wg Supply Duct Area Return Duct Area Fan Tracking Master Proportional Gain Fan Tracking Master Integral Gain Fan Tracking Master Derivative Gain Fan Tracking Submaster Gain Fan Tracking Submaster Center Value 96 Humidity Master Proportional Gain Humidity Master Integral Gain Humidity Master Derivative Gain Humidity Submaster Gain Humidity Submaster Center Value 96 Space Temperature Low Alarm Limit Occupied F Space Temperature High Alarm Limit Occupied F Space Temperature Low Alarm Limit Unoccupied F Space Temperature High Alarm Limit Unoccupied F Supply Air Temperature Low Alarm Limit Occupied F Supply Air Temperature High Alarm Limit Occupied F Supply Air Temperature Low Alarm Limit Unoccupied F Supply Air Temperature High Alarm Limit Unoccupied F Return Air Temperature Low Alarm Limit Occupied F Return Air Temperature High Alarm Limit Occupied F Return Air Temperature Low Alarm Limit Unoccupied F Return Air Temperature High Alarm Limit Unoccupied F Temperature Input Low Alarm Limit Occupied F Temperature Input High Alarm Limit Occupied F Temperature Input Low Alarm Limit Unoccupied F Temperature Input High Alarm Limit Unoccupied F Outside Air Temperature Low Alarm Limit F Outside Air Temperature High Alarm Limit F Mixed Air Te
143. n Air Temperature Sensor 44 Display Functions 69 Heat Interlock 45 SUMMARY DISPLAY Fan Relay o ceret Bees 45 STATUS FUNCTION Duct High Humidity Switch 45 HISTORY FUNCTION Wall Mounted Relative Humidity Sensor 46 e TEST FUNCTION Duct Mounted Relative Humidity Sensor 47 Programming Functions 81 LOCATION FOR OUTSIDE AIR RELATIVE SERVICE FUNCTION HUMIDITY SET POINT FUNCTION LOCATION FOR RETURN AIR RELATIVE HUMIDITY Mixing Box Linkage 47 Airflow Switch 48 Low Temperature Thermostat 48 Outdoor Air Thermostat 48 Filter Status Switch 49 High Pressure Switch 49 Air Quality Sensors 49 Constant Outside Air OAC Control 50 PROBE INSTALLATION OAC CALIBRATION USING OAVP VALUES TO DETERMINE DUCT AIRFLOW FIELD SUPPLIED OR HIGH VELOCITY PRESSURE TRANSDUCERS Field Wiring Connections 52 REMOTE LOCAL INTERFACE DEVICE HSIO RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR TEMPERATURE SENSOR ENTHALPY SWITCH AND MIXED AIR TEMPERATURE SENSOR SPACE TEMPERATURE SENSOR SPT DAMPER ACTUATORS SMOKE CONTROL OPTION ANALOG DEVICE FOR ANALOG OUTPUT TEMPERATURE CONTROL SCHEDULE FUNCTION C
144. n fan volume forced x forced value Humidifier first stage Humidifier first stage forced x forced value Humidifier 2nd stage Humidifier 2nd stage forced x forced value Analog temperature Analog temperature forced x forced value Discrete temperature Discrete temperature forced x forced value Discrete time clock Discrete time clock forced x forced value DX cooling stage 1 DX cooling stage 2 DX cooling stage 3 DX cooling stage 4 DX cooling stage 5 DX cooling stage 6 DX cooling stage 7 DX cooling stage 8 Table 13 Keyboard Directory cont SERVICE CONFIGURATIONS Display SCHEDULE Keyboard Entry Display Description OVRD X Number of hours to extend occupied mode of schedule 1 2 PERIOD 1 Define period 1 of time schedule 1 Time periods 2 8 of schedule 1 same elements as period 1 schedule 1 OCC X Start of occupied time UNO X Start of unoccupied time MON X Monday flag x entry code 1 yes 0 or CLR no TUE X Tuesday flag x entry code 1 yes 0 or CLR no WED X Wednesday flag x entry code 1 yes 0 or CLR no THU X Thursday flag x entry code 1 yes 0 or CLR no FRI X Friday flag x entry code 1 yes 0 or CLR no Saturday x entry code 1 yes 0 or CLR no SUN X Sunday flag HOL X Holiday flag LJ LJ LJ 7 H 5 1 e OVRD
145. n to their fully closed position If equipped with single stage analog humidification control verify that the modulating valve goes to its fully open position If equipped with two stages of humidification use an ohmmeter to verify that the reading across the 1st stage normally open relay contacts is less than 10 ohms Verify that the reading across the 1st stage normally open relay contacts is greater than 1000 ohms If equipped with two stages of humidification use an ohmmeter to verify that the reading across the 2nd stage normally open relay contacts is less than 10 ohms If equipped with two stages of humidification verify that the reading across the 2nd stage humidification nor mally open relay contacts is greater than 100 ohms Verify that the analog device connected to this output strokes to its 10096 position Verify that the analog device connected to this output strokes to its 096 position Using an ohmmeter verify that the reading across the DOTC Discrete Output Temperature Control normally open relay contacts is less than 10 ohms Using an ohmmeter verify that the reading across the DOTC normally open relay contacts is greater than 1000 ohms Using an ohmmeter verify that the reading across the DTCC Discrete Timeclock Control normally open relay contacts is less than 10 ohms Proceed with the testing of electric heat stages Table 21 If the unit is not equipped with electric heat exit the Quick Test mode as described
146. nd Date Display above 88 Example 21 Setting of Time and Date KEYBOARD ENTRY LJ EJ EO ETE Ee esl s IIL Ie dL ee DISPLAY RESPONSE COMMENTS TIME Time display subfunction of set point function Current setting is Monday 4 00 pm New setting of Tuesday 1 05 pm is entered and displayed Current setting is January 1 1996 MON 16 00 TUE 13 05 JAN 01 96 FEB 27 96 New setting of February 27 1996 is entered and displayed Example 22 Setting Daylight Savings Time KEYBOARD ENTRY Lfe ENM X ENM 4 END X END 16 ENT X ENT 2 00 LVM X LVM 11 LVD X LVD 12 LVT X LVT 2 00 DISPLAY RESPONSE DAYLIGHT COMMENTS Daylight savings time field configuration of set point function Month when daylight savings time begins Daylight savings time configured to start Month 4 April Day of month when daylight savings time begins Daylight savings time configured to start on the 16th of the month Time of day when daylight savings time begins Daylight savings time configured to start at 2 00 am on the 16th of April Month when daylight savings time ends Daylight savings time configured to end Month 11 November Day of month when daylight savings time ends Daylight savings time configured to end on the 12th of November Time of day when daylight savings time ends Daylight sa
147. nd installed See Table 9 for recommended actuators To install actuators see Fig 65 Using a 2 conductor 20 AWG conductor cable one twisted pair unshielded rated for the application connect the positive wire to terminal 37 in the option module Connect the negative wire to terminal 38 Connect the 24 vac power leads to TB2 terminals 23 and 24 Field Supplied Return Fans with Variable Frequency Drives must have 4 to 20 mA signal input boards and their own field supplied and installed power sources To install return fans with variable frequency drives see Fig 66 Using a 2 conductor 20 AWG conductor cable one twisted pair unshielded rated for the application con nect the positive signal wire to terminal 37 in the option module Connect the negative signal wire to terminal 38 The supply fan minimum set point must be equal to the return fan minimum airflow plus the delta airflow that is to be maintained RETURN FAN WITH IGV IR MONITORING STATION DIFFERENTIAL T PRESSURE TRANSDUCERS 3 AIR MONITORING S9LOR SUPPLYFAN STATION S9NX UNIT WITH IGV IGV Guide Vane Field Wiring NOTE Air monitoring stations are field supplied and installed pres sure transducers are factory supplied and installed Fig 63 Field Installed Fan Volume Control SUPPLY FAN 5 MONITORING STATION t 2 TO 10 VAC SIGNAL NE
148. ng Coil Valve Sizes 2 or 3 way A None 2 3 Two way valves Three way valves 4 Top in cv in 5 Rear B 1 2 04 Q 1 2 20 6 Top Rear Bottom 1 2 13 R 1 2 40 7 Top Rear Bottom D 1 2 22 S 3 4 6 8 8 Top Rear Bottom E 1 2 3 6 T 1 120 two position control F 3 4 50 U 11 4 16 0 9 Bottom G 3 62 V 11 2 33 0 0 Bottom H 1 8 2 W 2 55 0 J 1 11 0 X 21 2 67 0 Heating Coil Valve Sizes K 1 1 4 16 0 Y 3 91 0 A None L 11 2 25 0 Two way valves M 2 40 0 in N 21 2 65 0 B 1 2 0 4 P 3 850 C 1 2 13 D 1 2 22 E 1 2 3 6 Heating Coil Valve F 3 4 5 0 A None 3 4 62 B Normally open H 1 82 C Normally closed J 1 11 0 D Three way K 11 4 16 0 L 11 2 25 0 M 2 40 0 21 2 65 0 3 85 0 LEGEND ABX Air Blender AF Airfoil CV Constant Volume IGV Inlet Guide Vanes FC Forward Curved FMB Filter Mixing Box MXB Mixing Box PIC Product Integrated Controls VAV Variable Air Volume The cv capacity rating is the flow gpm through a valve at 1 psi pres sure drop Fig 1 Basic PIC Order Number 3914 1 1 Model No 39LJ Model 39L PIC with optional controls S9NJ Model 39NX PIC with optional controls Electric Heat Factory Installed 1 None 2 Yes without DX cooling 3 Yes with DX cooling
149. nge configuration of mixed air dampers 1 1 Used to read or change configuration of elec tric heater Used to read or change factory configura tion of Nighttime Free Cooling NTFC option 85 1 Used to read or change configuration of night purge option Used to read or change configuration of constant outside air option and outside air velocity pressure sensor Used to read change configuration of door air quality option and AQI sensor 1 Le Used to read or change configuration of in door air quality option and 2 sensor Used to read or change factory configura tion of Adaptive Optimal Start Stop Used to read or change factory configura tion of space temperature reset See Example 11 1 Lo Used to read or change loadshed group and number See Example 12 Example 11 Configuration of Space Temperature Reset DISPLAY RESPONSE SPCRESET KEYBOARD ENTRY COMMENTS Space temperature reset field configuration subfunction of service function RTIO 3 RTIO N Reset ratio set at 3 Ratio changed to N where new value within the allowable range LIMT 10 LIMT N Reset limit set at 10 Reset limit changed to N where N new value between 0 and 20 KEYBOARD ENTRY Loadshed field configuration subfunction of service function LSGP 1 Loadshed group 1 LSGP 2 L
150. nsducer low pressure USING OAVP VALUES TO DETERMINE DUCT AIR range minimum output value FLOW It is possible to determine the airflow cfm in the Transducer high pressure outside air duct based on the readings obtained by the OAVP range maximum output value probe See the following procedure Use the HSIO and status function to display the outside air velocity pressure Pv at the transducer Find the average velocity V in the duct in fpm 4005 Obtain the cross sectional area of the duct in sq ft A To determine the airflow F in the duct in cfm Table 7 OAC Pressure Transducers VELOCITY IN DUCT INDICATED VELOCITY TRUE VELOCITY PRESSURE MODUS PART RANGE TRANSDUCER in wg IN DUCT in wg fpm NO in 9 in wg Optimum Theoretical Optimum Theoretical Optimum Theoretical Range Range Range Range Range Range T40 005C 04 013 0 00 0 05 0 013 0 037 0 005 0 045 0 008 0 024 0 003 0 029 360 620 225 680 40 001 04 012 0 00 0 10 0 025 0 075 0 010 0 090 0 016 0 048 0 006 0 057 505 875 320 960 T40 003C 04 015 0 00 0 30 0 075 0 225 0 030 0 270 0 048 0 144 0 019 0 173 875 1520 555 1665 CARRIER PART NO HK05ZG004 HK05ZG005 HK05ZG006 51 Field Wiring Connections field wiring must comply with National Electric Co
151. nsor probe multiplier factor Minimum damper position Submaster reference value Submaster reference value forced Keyboard Entry 1 5 AIRQUAL1 EXE sara e 3 E AIRQUAL2 MPG X MIG X XDP X Q2LV X Q2HV X Q2LR X Q2HR X MDP X SPRESET RTIO X LIMT X Table 13 Keyboard Directory cont SERVICE CONFIGURATIONS Description Configuration of indoor air quality and AQ sensor no 1 Master proportional gain Master integral gain Maximum damper position Air quality sensor 1 low voltage point Air quality sensor 1 high voltage point Air quality sensor 1 low voltage reference Air quality sensor 1 high voltage reference Minimum damper position Configuration of indoor air quality and AQ sensor no 2 Master proportional gain Master integral gain Maximum damper position Air quality sensor 2 low voltage point Air quality sensor 2 high voltage point Air quality sensor 2 low voltage reference Air quality sensor 2 high voltage reference Minimum damper position Configuration of optimal start stop Building factor 24 hour occupied factor Set point bias Maximum allowable stop time Configuration of space temperature reset Reset ratio X Reset limit X 3 ETE EISE LOADSHED LSGP X FANTRACK SVUL X RVUL X SDAR X RDAR X MPG X MIG X MDG X SMG X SCV X SMR X SMR X Configuration of loadshed Loadshed group number 1 16
152. nt damage to the sensor HOLE will occur SIGNAL TERMINAL BLOCK RELATIVE HUMIDITY SENSING ELEMENT BOTTOM MOUNTING HOLE Fig 32 Wall Mounted Relative Humidity Fig 30 Wall Mounted Relative Humidity Sensor Sensor Positioning P N HL39ZZ001 46 Duct Mounted Relative Humidity Sensor The duct mounted relative humidity sensor and mounting tem plate are packaged and shipped inside the fan section The sensor is installed in either the return air ductwork or in the outside air ductwork If 2 relative humidity sensors are or dered for differential enthalpy control then the sensors must be installed in both the return air and outside air ducts If the sensor is used for control of a humidifier install the sensor in the return air duct The PIC controller has a return air relative humidity de fault set point of 40 LOCATION FOR OUTSIDE AIR RELATIVE HUMIDITY Locate the sensor where it accurately measures outdoor conditions yet is protected from the elements During the unoccupied fan off period the sensor s location should have a minimal effect on its readings LOCATION FOR RETURN AIR RELATIVE HUMIDITY Locate the sensor at least 6 in upstream or 15 in down stream of a 90 degree turn in the ductwork The best loca tion is 15 in downstream of the 90 degree turn of the duct The probe should be mounted in the center of the duct See Fig 33 Mount the relative humidity sensor Fig 34 as foll
153. o begin at 00 00 hours on the next day The time schedule can be overridden to keep the unit or optional discrete output in the occupied mode for 1 2 3 or 4 hours on a one time basis The air handler can be configured for an applicable holiday shutdown schedule This function can only be used if the PIC is connected to the Carrier Comfort Network The net work will send a holiday message flag to the unit on the appropriate holiday The unit then uses the schedule that has been set for the holiday period The unit automatically re turns to its normal schedule after the holiday period is complete 89 Figure 75 shows a Schedule I example for an office build ing with the unit operating on a set point schedule The schedule is based on building occupancy with 3 hour off peak cool down period from midnight to 3 am following week end shutdown To learn how this sample schedule can be programmed see Example 24 The same scheduling proce dures can be used to set optional discrete output Schedule II Subfunctions through define schedule of air handler Schedule D Subfunctions 1 through 1 5 define schedule of optional discrete output Schedule ID m PERIOD 5 PERIOD 4 PERIOD 2 PERIOD 3 6 Fig 75 Schedule Sample Time Schedule Example 24 Using the Schedule Function KEYBOARD ENTRY DISPLAY RESPONSE PROGRAMMING PERIOD 1 a
154. oadshed group changed to 2 2 o Used to read or change field configuration of fan tracking See Example 13 LEJE Used to read or change factory configura tion of humidity control gt Used to read or change factory configura tion of alarm limits See Example 14 2 s Used to read or change field configuration of analog temperature control See Example 15 2 Used to read or change field configuration of discrete temperature control See Example 16 KEYBOARD DISPLAY ENTRY RESPONSE COMMENTS FANTRACK Fan tracking field configuration subfunction of service function Supply velocity upper limit SVUL1S 15in wg Supply velocity upper limit 2 L SVUL 2 0 changed to 2 0 in wg Scroll past return velocity upper RVUL 1 5 limit 1 5 in wg SDAR 0 SDAR 8 Supply duct area 0 Supply duct area changed to 8 sq ft Enter whole numbers decimals not accepted Scroll past return duct area 6 sq ft Scroll past master proportional gain Scroll past master integral gain Master derivative gain Master derivative gain changed to 4 Scroll past submaster gain Scroll past submaster gain center value Submaster reference value calculated and updated by the Software Submaster reference value forced to X value Submaster reference value force is removed supe ES ee o gt m z 3 2 Example 14 Configuration of
155. ons is sent to the return fan inlet guide vane actuator or return fan inverter DIRECT EXPANSION COOLING CONTROL The di rect expansion DX cooling control regulates the DX cool ing system The DX cooling stages are energized and deen ergized to maintain the desired supply air temperature set point Whenever the system is in Nighttime Free Cooling mode or whenever the supply fan is off the DX cooling stages remain off If the supply fan is on the control reads the humidity sen sor if supplied and compares the value to the high humid ity limit If the humidity is higher than the high humidity limit the DX cooling stages are energized to maintain a mini mum supply air temperature If the humidity is below the limit the control reads the space temperature sensor and com putes the supply air temperature required to satisfy conditions Once the required supply air temperature has been cal culated it is compared to the actual supply air temperature and the required DX cooling stages are energized to main tain the desired conditions See Fig 77 for cooling operation and Fig 78 for DX sub master gain operation For more complete information refer to the Application Data book for Product Integrated Controls with DX Cooling ELECTRIC HEATER CONTROL Electric heater stag ing regulates the electric heater The heater is primarily used for morning warm up or Occupied Heating with the heater staged to maintain desired return
156. ontrol box adjacent to the air handling unit and then to en close the Class II wiring in flexible conduit between the con trol box and the junction box in the fan section The sheet metal housing of the control box is not airtight therefore warm moist air can migrate through the flexible conduit to the junction box in the fan section Condensate can form inside the junction box and possibly on the termi nal lugs To prevent moist air from migrating through the conduit seal the control wires inside the conduit at the remote con trol box enclosure See Fig 4 Use a nonconductive non hardening sealant Permagum manufactured by Schnee Morehead or sealing compound thumb grade manufac tured by Calgon are acceptable materials Make Electrical Connections 39L and 39NX units have internal control wiring for the operation of the PIC sec tion and its control devices The control system requires dedicated 120 vac or 230 vac 50 or 60 Hz power circuit capable of providing a minimum of 10 amps but not greater than 20 amps to the control box The actual number of con trols on one power source depends on the installation and power circuit requirements Do not run PIC power wiring in the same conduit as sensor wiring or control wiring of field installed devices IMPORTANT To ease installation control wiring is located on the service side of the unit with electrical connectors provided at all unit separation points If a unit i
157. ooling stage shut OFF Test is complete The unit is back under automatic control Table 23 Digital DC Volt Meter vs DC Milliamp Meter DC MILLIAMPS DC VOLTAGE 4 33 8 57 12 99 16 1 32 20 1 65 NOTE The internal solid state drives of the factory supplied elec tronic actuators impose a 82 5 ohm impedance to the signal current loop A proportional voltage ranging from 0 33 vdc at 4 mAto to 1 65 vdc at 20 mA will be present CONTROL LOOP CHECKOUT CAUTION Checkout and adjustment of control loops should only be performed by certified Carrier Comfort Network tech nicians The following checkout procedure is offered as a guide and presumes the user has obtained basic knowl edge of controls through CCN training To Check Operation of Analog Outputs The control algorithms of the 39L and 39NX use the master submaster loop concept The master loop monitors the mas ter sensor the sensor which tries to maintain the desired set point and calculates the submaster reference required to do so The submaster loop monitors the submaster sensor and controls the output to the controlled device These algo rithms require a number of gain values to function properly The 39L and 39NX come with preset default values How ever it may be necessary to adjust several of these values to achieve stable control These values are submaster loop gain SMG submaster loop center value SCV master loop pro portional gain MPG an
158. ove sensor cover Using a small blade screwdriver insert blade into sensor cover latch slot on bottom of slat Gently push upward on the screwdriver to release the cover latch Rotate the cover forward as the screwdriver is re moved 2 Snap off the wall plate from the base assembly 3 Feed the wires from the electrical box through the sensor base assembly 4 Using two 6 32 x 58 flat screws mount the sensor base assembly to the electrical box 5 Dress the wires down and inside the perimeter of the sen sor base 6 Attach the wall plate by snapping it onto the sensor base assembly 7 Replace the cover by inserting the top inside edge of the cover over the tab on top of the sensor base assembly and rotating the cover down Snap cover on Refer to Field Wiring Connections section page 52 for wiring instructions and details See Table 3 for Thermistor Resistance vs Temperature Values NOTE Clean sensor with damp cloth only Do not use solvents COVER P di WALL PLATE BASE PLATE OR 2 3 OF WALL HEIGHT TYPICAL ROOM LOCATION 2 MOUNTING SCREWS FURNISHED AMERICAN STANDARD ELECTRICAL BOX NEMA STANDARD ELECTRICAL BOX SENSORCOVER NEMA National Electrical Manufacturers Association Fig 18 Space Temperature Sensor P N HH51BX001 Table 3 Thermistor Resistance vs Temperature Values for Space Temperature Sensor Return Air Temperature Sensor and Supply Air Temperature Sensor
159. ows Position mounting template on duct Drill four mounting holes as indicated on the template 3 Punch a 1 hole as indicated on the mounting template 4 Mount sensor to duct using four no 8 screws Install 9 in sensor probe into the 1 hole CAUTION Never attempt to clean or touch the sensing element with Ne chemical solvents as permanent damage to the sensor will occur Mixing Box Linkage On units with mixing box MXB or filter mixing box FMB the actuator and linkage are fac tory installed The actuator is directly linked to the outdoor air damper and holds the damper closed No adjustment is necessary For shipping purposes the secondary linkage rod con necting the outdoor air and return air dampers is factory set for a closed return air damper Adjust the secondary linkage as follows Open the door of the MXB or FMB to access the return air damper crankarm NOTE On MXB FMB with top outdoor air damper it may be necessary to remove the vertical panel holding the return air damper to access the return air damper crankarm Loosen the setscrew on the return air damper crankarm Move the damper to its full open position Secure the setscrew on the return air damper crankarm Close the MXB or FMB access door GIU spar ba 47 RETURN FAN EXHAUST 2 2 Z LATE RETURN AIR RELATIVE HUMIDITY HUMIDITY RELATIVI SENSOR PIC SE
160. pply air temperature required to satisfy conditions Once the required supply air temperature has been calculated it is compared to the actual supply air tempera ture and the heating coil valve modulates to the required position CHILLED WATER COIL COOLING CONTROL The cooling coil control adjusts the chilled water valve The valve is modulated to prevent space temperature from exceeding the desired set point The valve holds its normal position if the space temperature is below the set point or the supply fan is OFF If the fan is ON the control reads the humidity sensor Gf supplied and compares the value to the high humidity limit If the humidity is higher than the high humidity limit the chilled water valve fully opens If the humidity is below the high humidity limit the con trol reads the space temperature sensor and computes the supply air temperature required to satisfy conditions Once the required supply air temperature has been cal culated it is compared to the actual supply air temperature and the chilled water valve modulates to the position re quired to maintain desired conditions See Fig 77 for cooling coil operation flow chart DIRECT EXPANSION COOLING CONTROL The direct expansion DX cooling control regulates the DX cool ing system The DX cooling stages are energized and deen ergized to prevent the space temperature from exceeding the desired set point The stages remain off if the space tem
161. ps from the bulkhead fittings located on the top edge of the control box and discard Verify that the 10 0 amp ON OFF switch located on the PIC control box door is in the OFF position Do not turn the power supply on at this time NOTE The 39NX and 39L air handlers are designed for in door applications Modified units are available for outdoor applications on pier or slab mounts not curb mounts Prod uct integrated controls are not available for outdoor appli cations Consult your Carrier sales representative for further details Service Area Requirements Article 110 16 of the NEC National Electrical Code describes electrical instal lation 39L and 39NX PIC installations must comply with the minimum clearances required for electrical installation as listed in Table 110 16 a of the code Make sure to pro vide the necessary clearance from the PIC unit to any ad joining wall Refer to the base unit installation instructions for detailed dimensions for each unit section Remote Control Box Option This option allows the PIC control box to be mounted away from the unit the remote control box Fig 3 must be wired to the supply fan section Mount the remote control box assembly to the mechanical room wall near the unit using field supplied Unistrut metal framing or equivalent supports The control box has 4 mounting holes in the back of the enclosure for this purpose Mount the remote control box as follows Loo
162. r duct and filters but as close as possible to the 39L or 39NX unit CAUTION AVOID repeated bending of copper tubing as this will place stress on the sensor element and lead to eventual breakage DO NOT fold or crimp copper tubing USE CARE in forming and securing the element STRIP back and tape the shield in order to prevent contact Mount field installed MAT as follows Fig 21 1 Punch a 1 diameter hole in the duct and feed the sen sor element through the hole Mount the utility box on the outside of the duct 2 Bend the copper tubing surrounding the sensor element to conform to the area of the duct Do not bend it to less than 2 2 in diameter on any turn The sensor element should be evenly distributed over the entire cross sec tional area of the duct Existing support structures may be used for the sensor element as long as there is no metal to metal contact with the copper tubing and the mounting does not interfere with other functions 3 Use a field supplied plastic spacer clamp and screws to secure the sensor in the airstream See Detail A Fig 21 4 Using 2 conductor 20 AWG plenum rated cable connect the sensor to the PIC control box terminals NOTE This sensor uses a resistance temperature device RTD element Polarity is not a consideration When space does not allow working inside the duct mount as follows Fig 22 1 Open duct penetration on the opposite side of the s
163. r is shipped inside the fan section The OAT sensor continuously monitors the temperature of the air outside the building The integral shield prevents ice formation on the sensor conductors field supplied conduit junction box is required for installation See Fig 20 Position the OAT sensor so that it accurately senses only the outdoor air temperature The sensor must be located up stream from outside air dampers and located where it is un affected by interior and duct temperatures During the unoc cupied fan off period the sensor s location should have a minimal effect on its readings Do not mount the sensor in direct sunlight Inaccurate read ings may result It may be necessary to field fabricate a shield to protect the sensor from direct sunlight Do not mount the sensor near the exhaust from air handling units or compressors or near leakage drafts of in door air or near shrubbery or trees Inaccurate readings may result Do not mount under direct water runoff Water may freeze around the sensor in winter and produce a false reading If sensor wire is shielded strip back the sensor shield and tape it to prevent contact Position the sensor with the slotted end pointed downward The field supplied junction box housing must be threaded to screw onto a male 2 in NPT electrical metal tubing EMT conduit adaptor The assembled box and sensor must be mounted parallel to the building wall See Fig 20 The sensor can
164. rature sensor supply air tempera ture sensor and return air temperature sensor The discrete output is turned ON OFF as required to maintain the user configured set point The controlling sensor is identified and its value is read The control determines which user configurable control logic normal or reverse is required The control compares the sensor value to the configured set point If normal logic is used the discrete output is turned ON when the sensor value is equal to or greater than the set point This output is turned OFF when the sensor value is less than the set point decreased by a user configurable hysteresis If reverse logic is used the discrete output is turned ON whenever the sensor value is less than the set point This output is turned OFF when the sensor value is greater than the set point increased by a user configurable hysteresis DISCRETE OUTPUT TIMECLOCK CONTROL This control sequence turns ON an output channel when the cur rent time of day is greater than or equal to the Occupied time and less than the next Unoccupied time This discrete output is OFF at all other times The output can be used for lighting control pump control or to control other devices which have to be ON during the Occupied period and OFF during the Unoccupied period This control sequence operates under its own time schedule Schedule IT Using the local interface device or building supervisor the output may be overridden
165. rd 7 Return air temperature sensor standard 34 Other optional sensor Submaster reference value Submaster reference value forced to N value Force removed from submaster reference value Display shows last value prior to force Example 16 Configuration of Discrete Temperature Control KEYBOARD ENTRY JE TES DISPLAY RESPONSE DO CTRL COMMENTS Discrete temperature control configuration subfunction of service function Controlling temperature sensor configured to sensor 1 Sensor codes as follows SEN 1 1 Supply air temperature sensor standard 2 Outdoor air temperature sensor standard 3 Mixed air temperature sensor optional 6 Space temperature sensor standard 7 Return air temperature standard 34 Other optional sensors Controlling temperature sensor is 34 where sensor 34 is one of 2 optional sensor types space temperature sensor or duct temperature sensor Discrete output control logic 0 normal logic 1 reverse s logic Used to read service history See Example 17 2 Used to read or change field configuration of service maintenance alarm duration and to read elapsed time See Example 18 SEN 34 E TYP 0 2 z Used to read timed override history See Example 19 NOTE 1 key is used to enable or turn on certain functions the CLR key is used to disable these functions The LJ
166. rm Q1SP X Air quality 1 set point ALARM X 15th alarm Q2SP X Air quality 2 set point Outdoor air velocity pressure OASP X set point ALARM X 16th alarm 2 Es 22128 ALARM X 17th alarm ALARM X 18th alarm ALARM X 19th alarm ALARM X 20th alarm ALARM X 21st alarm ALARM X 22nd alarm ALARM X 23rd alarm ALARM X 24th alarm ALARM X 25th alarm ALARM X 26th alarm ALARM X 27th alarm ALARM X 28th alarm ALARM X 29th alarm ALARM X 30th alarm ALARM X 31st alarm ALARM X 32nd alarm E Es E ede ed El Fo na Esp 22 21 70 Keyboard Entry Pl Rad 5 Table 13 Keyboard Directory cont STATUS Display INPUTS SPTX SAT X RAT X OAT X OAT X SPX SFSX ENT X ENT X RH X RH X FRZ X MAT X OARH X OARH X FLTS X FLTS X TEMP X RVP X SVPX DHH X EVAC X PRES X PURG X FSD X MTR X OAVP X OAVP X AQ1 X AQ1 X AQ2 X AQ2 X CUST X CUST X DXSD X DXSD X OUTPUTS IGV X DX Direct Expansion Description System inputs Space temperature Supply air temperature Return air temperature Outside air temperature Outside air temperature forced x forced value Static pressure Supply fan status Enthalpy switch status Enthalpy switch status forced x forced value Relative humidity Relative humidity forced x forced value Freezestat status Mixed air temperature Outside air relative humidit
167. rom each other Either circuit and its related control box interface can have 24 vac 120 vac or 240 vac power options that require a factory installed transformer are fused with 3 2 amp fuses on the secondary of each transformer When the control box is shipped separately for remote mount ing all unit wiring terminates in a junction box located in the fan section Refer to Fig 12 for the applicable wiring diagram and Table 2 for junction box connections If the unit is provided with a factory installed smoke con trol option refer to the section titled Field Wiring Connec tions Smoke Control Option page 54 PIC electrical components are UL Underwriters Labo ratories listed The electronic modules are approved under UL HVAC Equipment Standard 873 PIC units are listed and labeled by ETL Engineering Testing Laboratory to comply with UL Standard 1995 for heating and cooling units and comply with NFPA National Fire Protection Association Standard 90A 39LP 12 Model No 39LP Model 39L with PIC S9NP Model 39NX with PIC Unit Size 39L 39NX 03 12 25 07 17 39 92 o6 15 31 09 21 49 08 18 35 11 26 61 10 21 13 32 74 Control Voltage Single Phase Fan 1 115v 50 60Hz CV 2 230v 50 60Hz CV 3 115v 50 60 2 VAV FC 4 230v 50 60Hz VAV FC 5 115v 50 60Hz with field supplied inverter 6 230v 50 60Hz with field supplied inverter 7 115v 50 60Hz VAV AF S9NX 8 23
168. roper closure 3 Attach actuator to valve linkage mounting bracket and secure with self tapping screws The actuator should be fully retracted with no power or signal present 4 Screw the stem extension up until its hole aligns with the hole in the actuator piston 5 Screw the stem extension down 2 full turns away from the actuator piston 6 Turn circuit breaker to ON Electrically connect the ac tuator Using the cooling coil valve quick test extend the actuator piston to align holes and insert the connecting pin See Example 27 After inserting connecting pin exit Quick Test 7 Tighten the locknut against the stem extension to secure to stem 111 Example 27 Cooling Coil Valve Quick Test 2 Way Normally Closed DISPLAY RESPONSE KEYBOARD ENTRY NOTE For more complete instructions concerning the Quick Test pro cedure see Quick Test in the Start Up section pages 103 108 COMMENTS OUTPUTS Entering factory test of outputs Scroll past heating coil valve test by pressing key Cooling coil valve test HCV 96 Cooling coil valve actuator piston TEST extends Insert connecting pin EXIT TEST Exit factory test TST CMPL Test completed CONTROL MODULE TROUBLESHOOTING CAUTION To prevent electrical shock and equipment damage turn off all power to the PIC control box before removing or replacing modules General The processor module PSIO mast
169. rrectly If the actuator drives in the wrong direction go to the submaster gain SMG for the control loop and reverse the sign of the gain For example If the submaster loop gain is 5 0 change it to 5 0 Table 24 Recommended Gain Starting Valves GAIN VAV HCV MPG 8 0 0 3 HCV MIG 0 3 1 5 HCV SMGt 7 5 7 5 CCV MPG 8 0 0 3 CCV MIG 0 3 1 0 CCV SMG 7 5 7 5 MIXD MPG 8 0 0 5 MIXD MIG 0 3 1 5 MIXD SMG 7 5 7 5 MPG 0 5 IGV SMG 5 0 EH MPG 8 0 8 0 EH SMG 5 0 5 0 PREHEAT AO MPG 1 0 0 3 PREHEAT AO MIG 0 8 0 8 PREHEAT AO SMGt 3 0 3 0 PREHEAT AO SCVtt 10096 10096 RFVC MPG s 0 5 RFVC SMG 10 0 HUM MPG 2 0 2 0 HUM SMG 7 5 7 5 Differs from default value change the default value to obtain the recommended starting value shown TValues shown are for normally open valves If normally closed valves are used see Step 8 Values shown are for normally closed valves If normally open valves are used see Step 8 Tt Values shown are for normally open valves If normally closed valves are used subtract initial value specified from 10096 to obtain the correct value Example 100 SCV SCV 100 100 0 109 10 11 12 13 b Observe the operation of the controlled device for few minutes If the device oscillates every few sec onds around the forced value then lower the SMG by small amounts until the output steadies If the out put to the device respond
170. rs in order to provide mini mum outdoor air ventilation If the supply fan is OFF the damper is closed If the sup ply fan is ON the control determines if the unit is in the OCCUPIED mode If unit is in the OCCUPIED mode the dampers open If unit is in the UNOCCUPIED mode the dampers close FILTER STATUS CONTROL This control sequence moni tors one or more airflow switches which measure the dif ferential pressure between the upstream and downstream side of a filter When the filter becomes dirty or needs to be replaced the airflow switches send a discrete signal to the processor mod ule This in turn generates an alarm at the Local Interface Device or Building Supervisor FAN CONTROL The supply fan is started or stopped based on the occupancy schedule adaptive optimal start night time free cooling unoccupied heating unoccupied cooling demand limiting night purge or timed override The start of an occupied period is determined by either the occupancy schedule or optimal start If optimal start is not selected the supply fan starts at the occupied time en tered in the occupancy schedule If optimal start is selected the fan starts at the calculated start time The fan stops at the unoccupied time entered in the occupancy schedule Timed override may be used to extend the occupied period between and 4 hours During the unoccupied period whenever the space tem perature falls below the unoccupied heating s
171. rter per Fig 8 3 If applicable wire the return fan as shown in Fig 49 or NOTE Return fan power may be different from supply fan power 4 Connect leads from the return fan HOA switch to terminals 9 and 10 of TB5 5 Wire the first set of contacts of the DPDT FSD For fire shutdown of the unit from a local smoke detector wire ONLY the normally closed contacts NEC class 1 power rated to the hot leg of the fan power supply and ter minal 2 of TBI 6 Terminal 8 of 5 is internally connected to ground Connect one side of the EVAC PURG and PRES dry contacts of the smoke control panel to terminal 8 of TB5 7 Connect the other side of the PRES dry contact to ter minal 3 of TB5 Connect the other side of the PURG dry contact to terminal 4 of TB5 Connect the other side of the EVAC dry contact to terminal 5 of 5 8 Connect the normally open dry contacts of the FSD de vice smoke detector with auxilary relay and or smoke control panel dry contact set to terminal 1 and 2 of TB5 9 Connect the 24 vac relay coil of the FSD relay to ter minals 1 and 8 of TB5 10 Connect the second pole of the FSD relay to the hot leg of the return fan power supply and to terminal 11 of TB5 Refer to Fig 49 or 50 for point to point wiring of the smoke control option inside the PIC control box eres SUPPLIED zu E L J N PROCESSOR MODULE TTE 5 SEPARATE ri N Pl EDS 24 V
172. s Monday is now flagged for period 2 to be in effect Tuesday is not flagged for period 2 To put period 2 into effect on Tuesday Tuesday must be flagged yes Tuesday is now flagged for period 2 to be in effect For this example period 2 is to be in effect only on Monday and Tuesday All other days must be checked to be sure that they are flagged no If a day is flagged yes change to no Wednesday is now flagged no for period 2 Example 24 Using the Schedule Function cont KEYBOARD DISPLAY ENTRY RESPONSE COMMENT PROGRAMMING PERIOD 3 For this example Period 3 is used on Wednesday only 4 00 00 Start of occupied time Occupied time will start 9 000700 120700 UNO 00 00 Start of unoccupied time end of period 3 For this example period 3 should end at 21 30 9 30 pm Period 3 ends at 2 b ETE Ee UNO 21 30 51 30 9 30 pm MON NO Check to be sure that Monday and Tuesday are flagged no for period 3 TUE NO WED NO Wednesday is flagged no Change to yes WED YES Wednesday is now flagged yes for period 3 Check to be sure that all other days are flagged no FRI NO NO SUN NO HOL NO Period 4 and 5 can be programmed in the same manner flagging Thursday and Friday yes for period 4 and Saturday yes for period 5 For this example periods 7 and 8 are not used they should be pro grammed OCC 00 00 UNO 00 00 NOTE When
173. s open VAV units Return fan IGVs open VAV units equipped with return fan Heat Interlock Relay is ON VAV units 104 KEYBOARD DISPLAY ENTRY RESPONSE FSD NRM MTR XXX OAVP 0 00 AQ1 XXX AQ2 XXX CUST EN DXSD NRM LEGEND HOA Hands Off Automatic IGV Inlet Guide Vane Variable Air Volume Table 18 Test of Input Signals cont COMMENTS ACTION At Terminal Block 3 short Terminals 1 and 2 Verify that the display changes to FSD ALM Verify the following Supply fan is OFF Outside air and exhaust dampers if applicable close Return fan is OFF Supply fan IGVs close VAV units Return fan IGVs close VAV units equipped with return fan Heat Interlock relay is OFF VAV units If applicable verify that the display increments following the connected pulse type meter measuring power Verify that the velocity pressure reads 0 00 in wg with the fan OFF and the mixed air damper closed 0 setting Verify the displayed value using field supplied instrumentation located near the sensor Verify the displayed value using field supplied instrumentation located near the sensor Verify condensing unit lockout operation by rotating thermostat so display changes to CUST DSB Reverse thermostat to change setting back to CUST EN and reenable unit Verify that the direct expansion cooling shutdown value is normal Proceed with the testing of the outputs opt
174. s separated into pieces for installation rejoin all connectors in their original alpha numeric sequence upon reassembly Connectors for vertical fan sections that are shipped out of the normal operating position must also be joined at final assembly For units with an integral PIC section all unit factory con trol wiring is internal Only a small number of wires must be field installed All internal wiring consists of plenum wires which enter the rear of the control box through sealed fit tings Control wiring is 18 to 20 gage 2 conductor twisted pair The electrical power disconnect and fan motor starter are field supplied and installed Connections are provided in the control box to wire a field supplied HOA HANDS OFF AUTOMATIC switch If an HOA switch is used it must be field installed in the supply and return fan motor starter cir cuit The factory wired high pressure switch variable air vol ume only and low temperature thermostat options are en ergized when the supply fan circuit is powered See Fig 5 7 for control box component arrangements and Fig 8 for fan motor wiring PIC input and output points are listed in Table 1 Consult the wiring diagram located in the control box or Fig 9 12 for further details CAUTION Power is present in the PIC control box in the motor starter circuit even when the dedicated power to the PIC control box is off The supply and return fan starter circuits are independent f
175. s to a change in temperature in small increments then increase the SMG in small amounts until the output steadies NOTE Do not be alarmed if the submaster sensor sta bilizes at a value greater than or less than the forced value This is termed the submaster droop offset and is normal It is not necessary to adjust the submaster loop center value as the master loop will adjust the submaster ref erence as required to satisfy its set point However it may be desirable to keep the submaster droop to a mini mum This is most often required for heating coil loops especially on steam coils where the control valve has a tendency to be oversized If the submaster droop is too large adjust the SCV as follows If the submaster droop is positive actual value greater than reference value the SCV should be decreased for HCV and IGV loops and increased for CCV and MIXD loops If the submaster droop is negative actual value less than reference value the SCV should be increased for HCV and IGV loops and decreased for CCV and MIXD loops Once the submaster loop is adjusted remove all forces and proceed with verification and adjustment of master loop To check the master loop create an error in the master loop For example Change the actual space temperature to a value less than the heating set point or greater than the cooling set point Observe system loop response for 10 to 20 minutes to verify stable control After 10 minu
176. se priority level is 2 and the conditions below apply Space temperature is too high or too low Space relative humidity is greater than cooling coil high humidity limit CCHHL For VAV units only supply air temperature SAT is greater than the sum of cooling coil master reference plus 5 F or SAT is less than CCMR 8 F for 4 minutes or more Mixed air temperature MAT sensor is forced open or shorted OAT is less than 45 F MAT protection is enabled 115 Control will resume when space temperature recovers Ensure that CCHHL is set correctly Control will resume when the relative humidity drops below CCHHL Control will resume when SAT control recovers This is nor mal operation during conditions of high or low outside air temperature OAT Normal operation will resume when the MAT sensor is oper ating correctly or when OAT is greater than 45 F If OAT is greater than 45 F remove force from repair or replace the MAT sensor METRIC CONVERSION CHART METRIC ENGLISH x METRIC ENGLISH 2 x UNIT x UNIT x Temperature Area 100 T cm2 0 1550 in2 645 2 mm2 m 10 m ec 1 8 0 5556 10 76 0 09290 m Velocity Length m s 1 0 m s 1 0 5 3 281 ft s 0 3048 m s 39 37 micro inch 0 0254 m s 196 9 ft min 0 00508 m s mm 1 0 mm mm 0 03937 in 25 4 mm Volume
177. sen and remove the 4 nuts securing the control panel in the control box 2 Remove the control panel from the box set the panel and nuts aside for reassembly later Mount the control box to the Unistrut support using field supplied fasteners 4 Locate mark and drill pilot holes on the top of the box for each of the following Motor starter wiring e Actuator and sensor wires to fan section junction box Supply power wires ac Valve wiring or tubing water valves field supplied sensors or other devices Expand the pilot holes as required Recommended sizes are as follows Motor starter wiring 94 in 5 wires Actuator and sensor wires to fan section junction box to 1 in number of wires and hole di ameter determined by application Supply power wires ac 2 in or 3 4 in Valve wiring or tubing size as required Fan section panels are provided with pilot holes that can be drilled or punched to accomodate an electrical conduit for the remote control box wiring Where possible install the conduit in a panel that will not be removed such as the discharge panel See Fig 4 REMOTE CONTROL BOX CONDENSATE PREVEN TION When the remote control box is installed precau tions must be taken to prevent condensation from forming inside the junction box mounted in the unit s supply fan sec tion Standard installation practice is to mount the remote c
178. ssword entry in See Example 7 NOTE When more than one unit is connected to the Carrier Comfort Network the element address must be changed on all but one unit The element address system default is 1 and element address numbers cannot be repeated Element address must be changed at the local interface device Example 7 Reading and Changing Factory Configurations KEYBOARD DISPLAY ENTRY RESPONSE COMMENTS m Factory configuration sub 3 FACT CFG function of service function TYPE CV Unit type is constant volume Explanation is scrolled across UNIT TYPE IS CV TYPE VAV Unit type is changed to VAV COOL COI Cooling type is coil DXST 2 DX cooling stage quantity is 2 Heating type is hot water HEAT HCL steam coil s e HEAT NON Changed to no heat unit 2 HEAT ELE Changed to electric heat Heating type is changed back HEAT COI to hot water steam coil EHST 0 Electric heater stages 0 Electric heater stages where number of stages MIXD ALG Unit with mixed air dampers s e MIXD NON Changed to without dampers Indoor air quality type is single gas sensor Mixed air temperature MATP YES protection enabled 4 4 Buso Bus number 0 4 IAQT 1 ADR 1 Element address 1 2 ADR 2 Element address changed to 2 PSW Password 4 Used to change the HSIO display of the measure ments from English to Metric See Example 8 5 Used to re
179. ster device an outdoor air thermostat is not required The outdoor air thermostat is an SPST switch the con tacts open on temperature rise and the set point is adjustable from 45 to 75 F 7 2 to 23 9 C To increase the set point turn the indicator clockwise See Fig 37 for thermostat set point adjustment and mounting hole locations Thermostat should be mounted inside condensing unit control box where it can sense the outdoor air temperature but is protected from rain and snow Fig 37 Outdoor Air Thermostat Condensing Unit Status Switch Filter Status Switch The filter status switch FLTS is factory installed in the filter section on all PIC equipped units The switch is a snap acting SPDT switch When dirty filter elements cause the pressure drop across the filter me dia to exceed the switch setting the switch closes and sends an alarm signal to the PIC The 39L units use a single switch In 39NX units up to 3 switches can be connected in parallel When the switches are wired in parallel it is not possible to isolate an alarm signal to a single switch The FLTS has an operating range of 0 05 to 2 0 in wg Factory settings for the switch are as follows Filter Type Setting in wg Flat 0 5 Bag Cartridge 1 0 Final 1 5 The FLTS electrical ratings are as follows 300 va pilot duty at 115 to 277 vac 10 amps non inductive to 277 vac Rated for NO normally open and NC normally closed contacts Hi
180. t each monitoring station to the bulkhead fittings on top of the control box For runs up to 50 ft use 1 4 in OD tubing For runs over 50 ft use s in OD tubing Differential Pressure Transducers for fan volume control are factory installed in the control box two are supplied The power supply for the transducers is also factory installed Both transducers have pressure ranges of 0 0 to 1 0 in wg and produce 2 to 10 vdc signals See Fig 64 for wiring details 62 Note that if the velocity pressure of the supply and or re turn air is below 0 75 in wg the system may require trans ducers with lower ranges than those of the default factory supplied transducers As a general rule size transducers so that the maximum air velocity pressure is 7590 of the transducer s maximum value For example if the 39L or 39NX unit produces a maximum air velocity pressure of 0 15 in wg a transducer with a maximum value of 0 20 in wg can be used Sizing the transducers according to these guidelines ensures that they have good resolution Factory Supplied Return Fans with Inlet Guide Vanes IGVs are factory wired except for the air supply control signal from the airflow monitoring stations which is con nected in the field to the bulkhead fitting Return Fans with Field Supplied IGV Actuators must be able to receive a 4 to 20 mA signal and may NOT have an im pedance of more than 600 ohms An isolated power source must be field supplied a
181. t point Occupied cooling set point Unoccupied heating set point Unoccupied cooling set point Static pressure set point Supply air set point Delta CFM set point Humidity set point Analog temperature control set point Discrete temperature control set point Air quality 1 set point Air quality 2 set point Outside air velocity pressure set point Demand limit set points Demand limit set point 1 Demand limit set point 2 Configuration of current time and date Current day of the week and time Current date Configuration of daylight savings time Daylight savings time starts month Daylight savings time starts day Daylight savings time starts time Daylight savings time ends month Daylight savings time ends day Daylight savings time ends time Configuration of holidays Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day amp duration days long Holiday month day
182. t the DHH as follows 1 Position the mounting template on the duct Remove ad hesive backing and press template onto duct 2 Drill four Vs in mounting holes as indicated on the template 3 Cut out center portion of duct as outlined on template 4 Mount DHH to duct using screws provided For distances up to 500 ft use 2 conductor 20 AWG cable to connect the switch to the PIC control box terminals Refer to Field Wiring Connections section page 52 for fur ther details The DHH adjustment knob provides settings from 15 to 95 relative humidity The scale range is marked on the face of the switch The high humidity set point should be at least 6596 NOTE The duct high humidity switch has a relative humid ity differential of 596 k 4050 60 70 gp fo 29 Ml VA CLOSES ON RH RISE RED PILOT DUTY S V VOLTS AC 60VA 24 345VA RESISTIVE 24 240 8 AMPERES 120 240 BRN MAX AMBIENT 125 F CLOSES ON RH DROP Q Fig 28 Duct High Humidity Switch P N HL38ZG024 BEST LOCATION 6 IN MINIMUM AIRFLOW DUCT HIGH HUMIDITY SWITCH ALTERNATE LOCATION 15 IN MINIMUM Fig 29 Duct High Humidity Switch Locations Wall Mounted Relative Humidity Sensor Fig 30 wall mounted relative humidity sensor is packaged and shipped inside the fan section It is installed on interior walls to measure the relative humidity of t
183. terface device or Building Supervisor to in put the value as the OAVP set point FIELD SUPPLIED OR HIGH VELOCITY PRESSURE Note that the probe does not measure true velocity pres TRANSDUCERS The default pressure transducer in sure When positioned as recommended the probe measures stalled at the factory P N HK05ZG004 has a range of 0 00 a velocity pressure 1 563 times that of the velocity pressure to 0 05 in wg which matches an air velocity range of ap in the duct This multiplier magnification factor varies with proximately 225 to 680 fpm The maximum velocity for op the probe s location and can even be negative if the probe timum OAC operation and response however is 620 fpm is located at an elbow or turn All OAVP values displayed on If the average duct air velocity is greater than 620 fpm use the HSIO incorporate the multiplier factor to show the true one of the alternate transducers shown in Table 7 duct velocity pressure For a field supplied pressure transducer use the service If a precision manometer is not available read the veloc function EJE to configure the OAC control with ity pressure value at the HSIO when the system is running at maximum design airflow and input that value as the set the transducer s specifications point During normal operation the velocity pressure is held OALV Transducer minimum output voltage constant as the supply fan modulates OAHV Transducer maximum output voltage OALR Tra
184. tes if the output con tinues to swing full open to full closed lower the MPG and observe again Do this until the loop operation is stable After 10 minutes if the loop does not seem to respond little change in submaster reference increase the MPG and observe again Do this until stable opera tion is achieved Once you are satisfied with loop operation remove all forces which may have been initiated during this procedure Repeat steps 1 12 until all loops have been checked VALVE TROUBLESHOOTING General facilitate troubleshooting the valve it may be necessary to disassemble the electronic actuator from the valve body All 12 Through 174 Electric Hot Water Steam Valve Assemblies high temperature link age extension is supplied to help insulate the hydraulic ac tuator from heat See Fig 80 Mount valves so that valve stem is at a 35 to 45 angle from vertical See Fig 81 _ To remove the actuator from the high temperature valve 1 in Through 3 in Valve Assemblies linkage extension or from the 2 way normally open valve See Fig 82 remove the electro mechanical ac mounting nut proceed as follows tuator from the valve body proceed as follows 1 Secure the high temperature linkage extension or 1 Electrically power the actuator by turning circuit breaker 158 1 valve mounting nut to prevent turning to ON Using the local interface device force an output 2 Turn
185. the actuator base by hand counterclockwise off the of 1096 see Example 25 or enough to begin to move high temperature linkage extension mating threads or off the valve stem down releasing stem pressure It may be the mating threads of the valve mounting nut Do not ex necessary to slightly adjust the signal value up and down ert force on the upper housing If necessary a 198 open to create a rocking motion on the valve stem This will end wrench may be applied on the flats provided on the permit easier connecting pin removal actuator base 2 Remove the 2 self tapping screws that secure the actua 3 Separate hydraulic actuator from linkage extension or valve tor base to the linkage mounting bracket Turn the power mounting nut On assemblies using the linkage exten to OFF and remove actuator assembly sion retain the white spacer now loose inside the ac tuator base for reassembly later ACTUATOR RACK STEM CONNECTING PIN To reassemble the hydraulic actuator to the valve body 1 On valve assemblies equipped with high temperature link SH STEM EXTENSION INDICATOR PLATE 62 SELF TAPPING y m STEM LOCK NUT age extension insert the white spacer inside the actuator base 2 Secure the high temperature linkage extension or valve mounting nut to prevent turning 3 Turn the actuator base by hand clockwise onto the high temperature linkage extension or valve mounting nut un til secure Do not exert force on the
186. the next test is displayed you can start the test by pressing advance past it by pressing or back up by pressing The unit remains in Quick Test until s fe and then are pressed At that time the unit reverts to automatic control If the keyboard is not used for 10 minutes the display automatically returns to the rotating default display You must press to exit Quick Test and then press to restart the procedure KEYBOARD DisPLAY ENTRY RESPONSE INPUTS SAT X OAT X SPT X RAT X ENT X SFS OFF SFS ON FRZ SP 0 0 PE al al lal Table 18 Test of Input Signals COMMENTS ACTION Field testing of inputs X current value All temperatures should be 2 degrees F from actual Verify that the supply air temperature sensor reading agrees with the actual temperature Verify that the outdoor air temperature sensor reading agrees with the actual temperature Verify that the space temperature sensor reading agrees with the actual temperature Verify that the return air temperature sensor reading agrees with the actual temperature Verify proper enthalpy reading Move the knob on the enthalpy switch from A to D or D to A and verify that the display readout changes Verify that the supply fan status is OFF when the supply fan is OFF Verify that the supply fan status is ON when the supply fan is ON Unit may be started by placing the HOA switch in the HAND position
187. tion The heat interlock relay is energized whenever there is a need for heat Once morning warm up is completed heat is activated again unless Occupied Heat has been selected During cooling or fan only operation heat can also be pro vided to maintain the supply air temperature when the amount of cold outside air admitted by the IAQ or OAC controls causes the temperature to fall below the supply air set point CHILLED WATER COIL COOLING CONTROL The cooling coil control adjusts the chilled water valve The valve is modulated to maintain desired supply air temperature set point The valve is held in its normal position whenever the system is in Nighttime Free Cooling or whenever the supply fan is OFF If the fan is ON the control reads the humidity sensor and compares the value to the high humidity limit If the humidity is higher than the humidity limit the chilled water valve fully opens If the humidity is below the high humidity limit or if no humidity sensor is supplied the control reads the supply air sensor and computes the supply air temperature required to satisfy conditions provided that return air temperature is greater than the Occupied Cooling set point Once the required supply air temperature has been cal culated it is compared to the current supply air temperature and the chilled water valve modulates to the position re quired to maintain desired conditions See Fig 77 for cooling operation flowchart
188. tions shipped with the sensors For each sensor use two 2 conductor 20 AWG twisted pair cables unshielded to connect the separate 24 vac power source to the sensor and the sensor to the option module PSIO slave terminals To connect each AQ sensor to the option module identify the positive and negative terminals on the sensor connect to terminals 25 and 26 and connect AQ to terminals 28 and 29 OUTSIDE AIR VELOCITY PRESSURE OAVP SEN SOR The OAVP sensor is factory installed and wired As shown in Fig 62 the sensor s power wiring is connected to TB2 9 and 10 for 39L units or TB2 29 and 30 for 39NX units the signal leads are connected to terminals 31 and 32 in the option module FIELD SUPPLIED ISOLATED 24 VAC OWER I I LEGEND AQ Air Quality Sensor OAVP Outside Air Velocity Pressure Sensor Field Wiring Factory Wiring NOTE See unit label diagram or Fig 12 for remote mount control box connections Fig 62 Air Quality and OAVP Sensor Wiring FAN VOLUME CONTROL Fig 63 Airflow Monitoring Stations are field selected and field installed in the supply and return air ducts see Fig 63 Install each monitoring station in a straight portion of the duct with any upstream or downstream elbows or fittings at least 2 5 diameters away Use approved plenum tubing to connec
189. tive signal wire connected to the GREEN lead to pin 44 on the processor module NOTE If the probe is more than 100 ft from the control box it is recommended that the static pressure sensor be re Valves MUST be connected to the correct processor mod ule terminal to operate properly Damage to the actuator may occur if the valve is improperly connected Chilled Water Valves Fig 16 Using 4 conductor moved from the control box and mounted remotely The sen 20 AWG cable two twisted pairs no shield connect the sor should be mounted closer to the probe and then rewired chilled water valve actuator as follows to the original connections in the control box 1 Using twist on wire connectors connect the BLACK and WHITE BLUE leads inside the actuator junction box to the 24 vac power wires of the cable Connect the other ends of the power wires to TB2 pins 9 and 10 in the PIC control box WHITE BLACK BLUE ACTUATOR SIGNAL WIRES 4 TO 20 mA GREEN RED 4 FACTORY WIRING FIELD WIRING NOTE Connections for 39NX with integral PIC shown See wiring diagrams in Fig 9 and 12 for terminal connections in 39L control box and all remote mount control boxes Fig 15 Hot Water Valve Wiring 39 WHITE BLACK BLUE SIGNAL WIRES 4 TO 20 mA ACTUATOR GREEN El ri s El 46 m 0 D m EJ 0 4 RED
190. to extend the occupied period be tween 1 and 4 hours The control determines the output that is under time clock control The current time of day is compared to the Occupied time and to the next Unoccupied time If the current time of day is equal to or within the Occupied time period the discrete output is turned ON If the current time of day is equal to or within the Unoccupied time period the discrete output is turned OFF 93 HUMIDITY ANALOG OUTPUT CONTROL The hu midity analog output control adjusts the steam valve of the steam grid humidifier The valve is modulated to maintain the desired space or desired return air humidity set point depending on whether a wall mounted or duct mounted hu midity sensor is used A duct high humidity switch is also monitored and provides a user adjustable high limit safety If the supply fan is OFF the steam valve is held closed If the supply fan is ON and the unit is in the Unoccupied mode the valve is held closed If the supply fan is ON and the unit is in the Occupied mode the system determines the status of the duct high hu midity switch If the duct humidity is above the switch set point the valve is held closed If the duct humidity is less than the switch set point the control reads the humidity sen sor compares the value to the set point and modulates the output as required to satisfy conditions HUMIDITY DISCRETE OUTPUT CONTROL The hu midity control sequentia
191. tor to calculate stop time offset The amount to expand the Oc cupied set point is user configurable Like adaptive optimal start the control corrects itself for optimal operation by ad justing the K factor TWO STEP DEMAND LIMITING Available on Units Connected to the Carrier Comfort Network Only If the Demand Limit option is enabled the control receives and accepts redline alert and loadshed commands from the Network Loadshed option See the CCN Loadshed manual for additional information When a redline alert 15 received the Control decreases the Occupied Heating set point by 2 F and increases the Oc cupied cooling set point by 2 When a loadshed command is received the supply fan turns OFF The maximum loadshed timer prevents the system from remaining in loadshed should the control lose communica tions with the Loadshed option If the timer expires be fore the loadshed command is cleared by the Loadshed op tion the control clears the loadshed command itself and returns to normal control The loadshed timer is factory set at 60 minutes Variable Air Volume Units Only CONSTANT OUTSIDE AIR OAC During Occupied periods this feature provides a continuous flow of outside air into the building The OAC control modulates the mixed air damper to a configurable minimum open position to en sure outside air is admitted During Unoccupied periods the control signals the dampers to fully close To monitor the outsi
192. ture values are generated 2 Install cable from the actuator to the PIC control box 3a For the outside air damper OAD actuator connect the Fig 45 Space Temperature Sensor Wiring positive lead to pin 40 of the processor module Con nect the negative lead to terminal 6 of terminal block 2 TB2 For factory supplied actuators that are field installed the 24 vac power source is included with the unit wired in the control box For field supplied actuators a 24 vac power source must be field supplied and installed for each actuator b If the actuator is factory supplied connect the actua tor s 24 vac power wires to TB2 terminals 19 and 20 If the actuator is field supplied connect the power wires to a separate isolated 24 vac power source 53 Table 9 Recommended Actuators PART VOLTAGE IMPEDANCE NO 50 60 Hz VA 24 vac Ohms HF27BB006 82 5 HY27BB001 250 0 HF27BB010 Shipped with drive HF39CB001 which must be field installed on actuator NOTES 1 All actuators are spring return 2 Damper area ratings are nominal and are based on standard NOT low leak dampers at 1 0 in wg pressure and 2000 fpm velocity 3 Actuator wire coding is as follows HF27BB006 BLACK and WHITE 24 vac EXD Exhaust Air Damper Actuator RED signal GREEN signal TB2 71 gagag BEN REMOVE FACTORY INSTALLED IS ua 3 LEGEND Field Wiring 4 e 2 2 11
193. tures output values and input values These subfunctions are defined pages 78 80 Refer to Table 11 for additional information a Alarms Alarms are messages that one or more faults have been detected Each fault is assigned a code num ber which is reported with the alarm See Table 14 for code definitions The codes indicate failures that cause the unit to shut down terminate an option such as reset or result in the use of a default value as the set point Up to 32 alarm codes can be stored at once To view them in numerical sequence press 1 to enter the alarm display and then press to move to the individual alarm displays Press after a code has been displayed and the meaning of the code will scroll across the screen See Example 1 If an input or output point which has generated an alarm resets returns to a range within its limits the alarm code is deleted from the list A historical sequence of the last 9 alarms can be found using the usr key See Display Functions History Func tion section for more details 2 Modes The operating mode codes are dis played to indicate the current operating status of the unit See Table 14 To enter the MODES subfunction press 2 and use the key to determine if more than one mode applies See Example 2 to read current mode with expansion Example 1 Reading Alarm Codes KEYBOARD DISPLAY ENTRY RESPONSE COMMENTS TUE 12 45 Keyboard
194. upply air temperature high alarm limit unoccupied Return air temperature low alarm limit occupied Return air temperature high alarm limit occupied Return air temperature low alarm limit unoccupied Return air temperature high alarm limit unoccupied Temperature input low alarm limit occupied Temperature input high alarm limit occupied Temperature input low alarm limit unoccupied Temperature input high alarm limit unoccupied Outside air temperature low alarm limit Outside air temperature high alarm limit Mixed air temperature low alarm limit Mixed air temperature high alarm limit Relative humidity low alarm limit Relative humidity high alarm limit Outside air relative humidity low alarm limit Outside air relative humidity high alarm limit Static pressure low alarm limit Static pressure high alarm limit Supply velocity pressure low alarm limit Supply velocity pressure high alarm limit Return velocity pressure low alarm limit Return velocity pressure high alarm limit Delta CFM x 100 low alarm limit Delta CFM x 100 high alarm limit Air quality sensor 1 high alarm limit Air quality sensor 2 high alarm limit Keyboard Entry EXE exer 5 AES 5 3 E 5 HE 5 DO CTRL SEN X TYP X HYS X SERVHIST SDAY X STX FH X DOW HH MM DOW HH MM SRV MTN SMAL X SMEH X OVRDHIST OHR X Table 13 Keyboard Directory cont SERVICE CONFIGURATIONS
195. uspended Not used DX cooling shutdown Pressurization Evacuation Smoke purge Fire shutdown Service maintenance required Linkage failure Space temperature low limit Space temperature high limit Supply air temperature low limit Supply air temperature high limit Return air temperature low limit Return air temperature high limit Mixed air temperature low limit Mixed air temperature high limit Outside air temperature low limit Outside air temperature high limit Static pressure low limit Static pressure high limit Relative humidity low limit Relative humidity high limit Fan status Freezestat Analog temperature control sensor low limit Analog temperature control sensor high limit Outside air relative humidity low limit Outside air relative humidity high limit Supply velocity pressure low limit Supply velocity pressure high limit Return velocity pressure low limit Return velocity pressure high limit Delta CCFM low limit Delta CCFM high limit Filter status Duct high humidity CCFM 100 Table 15 State of Items Controlled MODE DISPLAY RETURN SUPPLY OUTDOOR RETURN EXHAUST SUPPLY FAN RETURN HEAT ELECTRIC CODE FAN FAN AIR AIR DAMPER INLET GUIDE FAN IGV INTERLOCK HEAT ALL DAMPER DAMPER VANES IGV REAY STAGES Pressurization 34 2 Open to Close Off tatic Pressure Set Point Purge 36 Open to Open to Off Static Pressure Z A Set point Evacuation 35 Close Open Off Fire Shutdown
196. vings time configured to end at 2 00 am on November 12 Reading and Changing Holidays Example 23 explains how to set holidays Up to 18 holiday periods can be set for one calendar year When the calendar year changes the holidays must be reconfigured for the new year Example 23 Setting of Holidays DISPLAY RESPONSE COMMENTS Holiday field config uration subfunction of set point function First holiday configuration The first holiday is configured to start Month 7 July day 4 July 4 and last for one day The second holiday is configured to start Month 11 Novem ber day 23 and last for 2 days KEYBOARD ENTRY Jee JE TE TE TEE E P COE C Es TES Ee SCHEDULE FUNCTION Two schedules are provided with the PIC system Schedule I automatically switches the unit from an occupied mode to an unoccupied mode Sched ule II automatically changes the optional discrete output from occupied to unoccupied mode Each schedule consists of from one to 8 occupied time periods set by the operator These time periods can be flagged to be in effect or not in effect on each day of the week The day begins at 00 00 and ends at 24 00 The unit is in unoc cupied mode unless a scheduled time period is in effect If an occupied period is to extend past midnight it must be programmed in the following manner Occupied period must end at 24 00 hours midnight a new occupied period must be programmed t
197. water applications with 112 to 3 in valves the valve actuators can be mounted in any position above the centerline of the valve body For steam applications or hot water applications with 1 2 to 11 4 in valves that have actuators and high temperature linkage exten sions mount the actuator above the centerline of the valve body and 45 degrees from vertical This position helps to prevent actuator exposure to direct heat convection CAUTION DO NOT install valve assembly where excessive mois ture corrosive fumes and or vibration are present INSTALL all 2 way valve assemblies so that they close against system flow arrow on the valve body indi cates the proper flow direction ALW AYS install 3 way mixing valve with 2 inlet flows and one outlet Normal flow will be from port B to port AB with stem up See Fig 14 38 VALVE ACTUATOR ACTUATOR LINKAGE VALVE BODY RETURN CHILLED WATER B NO COIL SUPPLY CHILLED WATER MIXING VALVE RETURN SUPPLY HOT WATER MIXING VALVE Fig 14 Three Way Mixing Valve Normal Flow Typical Piping VALVE WIRING 2 Using twist on wire connectors connect the RED and GREEN leads inside the actuator junction box to the CAUTION other 2 wires in the cable Note the polarity of each wire 3 Connect the positive signal wire connected to the RED lead to pin 46 on the processor module Connect the nega tive signal wire connected to the GREEN
198. with the limits of a Class A computing device as defined by FCC regulations Subpart J of Part 15 which are designed to provide reasonable protection against such interference when operated in a commercial environment SAFETY CONSIDERATIONS Installation and start up of air conditioning equipment can be hazardous due to system pressure and electrical compo nents Only trained and qualified service personnel should install start up or service air conditioning equipment When working on air conditioning equipment observe pre cautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes including ANSI American National Standards Institute Z223 1 latest version Wear safety glasses and work gloves WARNING Disconnect all power to the unit before performing main tenance or service Unit may automatically start if power is not disconnected Electrical shock and personal in jury could result FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance GENERAL The Product Integrated Control PIC option is available for 39L and 39NX indoor units with a draw thru configu ration The PIC control box can be supplied as part of a dedi cated PIC section it is factory installed and wired and has the same hand orientation as the fan section The control box can also be sh
199. y Outside air relative humidity forced x forced value Filter status Filter status forced x forced value Temperature input Return velocity pressure Supply velocity pressure Duct high humidity Evacuation Pressurization Smoke purge Fire shutdown Meter Outdoor air velocity pressure Outdoor air velocity pressure x forced value Air quality 1 Air quality 1 x forced value Air quality 2 Air quality 2 x forced value Condensing unit status Condensing unit status x forced value DX cooling shutdown DX cooling shutdown x forced value System outputs Inlet guide vanes 71 Keyboard Entry x Imc gt 555959 STATUS Description Inlet guide vanes forced x forced value Mixed air damper Mixed air damper forced x forced value Heating coil valve Heating coil valve forced x forced value Cooling coil valve Cooling coil valve forced x forced value Supply fan start stop Supply fan start stop forced x forced value Heat interlock relay Heat interlock relay forced x forced value Electric heat stage 1 Electric heat stage 2 Electric heat stage 3 Electric heat stage 4 Electric heat stage 5 Electric heat stage 6 Electric heat stage 7 Electric heat stage 8 NOTE Only the actual number of heater stages applicable to the unit are provided Return fan volume Retur

Carrier 39L Air Conditioner User Manual

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