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TracRite Digital Control System User Manual

1. SHIELDED CABLE 7 54 NON RECIRCULATING Indirect Fired MODEL DIAGRAM _ COMPONENT IDENTIFICATION FL D2 Fl 05 FU 0B FU 09 EXHAUST FAN INTERLOCK 51 01 E pe PILOT DUTY RATED ALARM STATUS RE 09 Esq COOLING RELAY E RE 34 HIGH TEMPERATURE LIMIT SWITCH FM HIGH TEMPERATURE LIMIT MANUAL DRAFT INDUCED MOTOR FUSE BURNER MOTOR FUSE CONTROL VOLTAGE FUSE CONTROL TRANSFORMER FUSE MAIN DISCONNECT FUSE MANUAL MOTOR PROTECTOR SUPPLY FAN MOTOR INDUCED DRAFT FAN MOTOR BURNER MOTOR MODULATING GAS VALVE OPERATOR OUTSIDE AIR DAMPER DRAFT PROVING SWITCI BURNER AIR SWITCH HIGH TY SWITCI BURNER AND DRAFT INDUCED RELAY BURNER RELAY LOW FIRE RELAY LOW FIRE HOLD RELAY FLAME FAILURE RELAY BURNER STATUS RELAY TIME DELAY RELAY SET 10 SEC SAFETY GIRGUIT STATUS RELAY STATUS RELAY MAIN SUPPLY FAN MOTOR STARTER MAIN DISCONNECT SWITCH LOW FIRE START SWITCH BURNER CYCLING SWITCH OUTSIDE AIR DAMPER END SWITCH CONTROL VOLTAGE TRANSFORMER GAS IGNITION TRANSFORMER PILOT GAS VALVE MAIN GAS VALVE AUX GAS VALVE RESISTOR 1K OHM RESSTOR 2K OHM RESSTOR 4 02 OHM RESSTOR 8 06 OHM RESSTOR 10 OHM AUXILLARY UNIT ENABLE 100 PERCENT OUTSIDE AIR SWATCH LOW VOLTAGE TRANSFORMER OUTSICE AIR TEMPERATURE SENSOR CISCHARGE AR TEMPERATURE SENSOR UNIT CONTROL MODULE BURNER ENABLE RELAY CODLIN
2. 51 NON RECIRCULATING and TMM MODEL 52 RECIRCULATING TFL MODEL sess 53 NON RECIRCULATING TFL MODEL DIAGRAM sese 54 OVERVIEW A glossary has been provided to assist the reader in understanding distinctive terms and phrases These terms and phrases appear in italics Temprite s Digital Control System TracRite is designed to give the user the ultimate in unit performance and operational flexibility adaptability and reliability in a user friendly package The TracRite DDC system is a standard component on Temprite heating and cooling units Because the TracRite system encompasses a wide variety of unit types not all of the system s capabilities and functions are relevant to all units Where a function is similar but different between recirculating and non recirculating units or direct fired or indirect fired units the function is explained separately TracRite accepts single or multiple units on the system network Each unit can be provided with a local user interface The operating parameters for individual units may be input through the local interface A PC may also be connected to the network This allows the user to configure each unit separately or all units can be configured simultaneously A controls contractor can provide assistance in networking Operational modes include time scheduling fi
3. GA 03 o 10v 4 m E ge 4 20 oMa Nc R A N G 9 e E e Note Piping from unit into building for Uc ot JUMPER HERE FOR MAT DAMPER CONTROL INPULS 182 zuo Sov TERE OK DAMPER CONTROLI Sonn ge eck Ow Sus 208 BURNER CONTROL RE 56 5 03 RS 04 Ave pad AM Of Of ASW 72 g o 5 pn RS 02 7 95 01 65 06 RS 03 RS 04 24 M 12 ASW 09 RE 12 TUM RS 02 RS 01 1 SHIELDED 7 4 ParefoDds eus e 53 NON RECIRCULA TING TFL MODEL DIAGRAM MP NTIFICATION X4 700 MODULATING BURNER CONTROL CIRCUIT TRANSFORMER BREAKER FAN SWTCH HIGH TEMPERATURE LIMIT SWITCH
4. Heating Night Setb ck us eere Cooling Night Setb ck ies Auxiliary Unit Enable ete Seine eee n Cd vata eee ade VDT EXDOFt CON ve SN 12 UNIFOER vatna 12 UNEEMANUAIS MODE hat Gees ee 12 UNEFAUTO MODE iesus 12 Scheduline eee 13 Auxiliary Unit Enable 7s nest v et d eb hb ette het eds 13 Heating Ventilating Cooling Operating Heatino dc o tex re 14 General Control nasa HOO ei irc edt eoe aL sers 14 Re circ latng Direct Fired Heaters nS oie sere 15 Energy Savings Mode 1 Mixing Box Recirculating 15 Energy Savings Mode I Non Recirculating 16 Energy Savings Mode 2 Mixing Box Recirculating Direct Fired 16 En rey Savitigs Mode e ske 16 Ventilation scie i eeu tivo dut tira ad 16 OUS sc ste 18 Energy S vings Mode 4 ie RIO NI E 19 Damper Control Modes 20 IATA M d O vas 20 MDT MRT and MRT Pro Controls rrnvrrrnrnrnnvrrrnvrrenvresnvnrennrssnvrnnnressvrrsnnrsssvsrnnnrsssvsrennrsssnssnnnssssvssennssssvssensesenn 20 MRT Expe tt Controle teie dett e INI 20 Mixed Air Temperature Mode iret eerte en teret ei esent bae
5. 13 Em dHeas vi BL 1 av se 284 sour PILOT RE 02 ASSEMBLY 202 TO DDC CONTROL mw c TG zT PS 12 50 en 50 01 6 17 ne BURNER CONTROL ENCLOSURE 5 4 8 RE 34 AA TO NEXT RE 35 PAGE stb EJ FL 0 OFF 90 ON 125 RE 57 FL 08 FL 05 OLOLOL SED 4 ISw 18 i RE 80 RE 35 2 fe 8 54 LOW ALERT EXHAUST INTERLOCK 51 01 H Fo RE 81 ei re pressure transducer PT 13 is by others High side port tube piped into building ond low side port tube piped to atmosphere med v 5 02 mh 2 0 va ener meme 3 finer 2 18 sem ser 232 la le IW PER PT 13 23 a me of 82 42 HIGH ALERT INTERLOCKING RELAY 55 36 HIGH ALERT PILOT DUTY RATED RE 78 52 E 33 54
6. TracHite Digital Control System User Manual Rev 10 22 07 Table of Contents OVERVIEW iiit ett due 6 NETWORKING Eie 7 THACRITE DEFAULT SETTINGS 7 UNIT OPERATING gt 8 NOREMA 8 UNIT MODE Latte eee eee ee 8 MANUAE MODE ente enter 8 UNLDLAUIO teet eie tete e ttim e 8 COM NS andere ES 9 UNIT OFF MODE 63 0 1 2 re tenti Re re acl De Eee Re IEEE Ie erd Er o REP Edd 9 UNEI MANUAL MODE itis rnt EORR EET rann en 9 UNIT AUTO MODE rect io rss Interne 9 9 UNITFO EF MODE E 9 MANUAL MODE OA e 9 UNITAUTO MODE RC eher 9 Unocc pied Occ pied Controleer oed ERE E E 9 Scheduling Time 10 SCID ACK e REEF vue EUN OPE Hae 10 Golins Nioht Setha 10 Auxiliary Unit Enable e te Sek E e N 10 MRT Expert COBITOIS MS AA E Gated A a UNIT OFF MODE UNIT MANUAL UNIT 2 222 2000 Scheduling Time Clock een
7. 20 LOW ALERT RE 81 H Fe ST 01 od Ha EXHAUST FAN INTERLOCK 35 HIGH ALERT RE 82 HIGH ALERT 241 32 PILOT DUTY RATED INTERLOCKING RELAY RE 78 36 USER CONFIG ele 33 34 01 Eod GA 04 24 0 10 x 6 4 20MA GA 03 RE 80 REZBI REZB2 Ba OO Uc 01 MP 15 9 9 eo rav DE cuo INPUT 0 5 0 DE 231 fine Ed R5 03 Ea RS 04 ASW 72 cuo 266 a ia a 15 01 d a TS EN A cet 005 206 USER CONFIG OUTPUT 0 10 0 BURNER CONTROL 204 RE 34 RE 28 pf
8. een 37 SOLUTION If desired onde er Eoi diee ens UT 37 SOLUTION If less outside air is desited 3 nra e rer tee os 38 GIOS SATV 38 Menu Selection Tree for BACview 40 UNIT MODES HOTKEY b e Mt 40 SETPOINTS JOE 40 STATUS MENU HOTKEY E ct sa etse MU ED E 41 ALARM BOTEN ransaket 42 RESETS HOTKEY 42 SCHEDULES HOTKEY oT Gade M 42 HELEP HOTKEY 43 USER CONFIGURABLE HOTKEY 8 43 UNIT SETUP HOTKEY al acest o oed Error Bookmark not defined BACON Error Bookmark not defined ADDOHOIX ETEN 45 Thermistor Output 45 ADDODOLIX IH oce EDS 46 Station ESyOul ett dieti dus iuda ue 46 ADDOHOPX Ew it eti dans 47 Zone 5893 5 ie rr eere oti tare ans 47 APPENDIX AIV tate teat 48 MRT Pro Setpoint Explanation ose aute pasti tel eb ttd dese nce tol ee pu ee d 48 Typical Wiring Schematic sss 49 RECIRCULATING CMA MODEL DIAGRAM sie ti eite en 49 NON RECIRCULATING MODEL DIAGRAM sse 50 RECIRCULATING TMM MODEL
9. for BOs SHIELDED COMPONENT IDENTIFICATION HIGH TEMPERATURE LIMIT SWITCH RETURN AIR FIRE STAT OPTIONAL SUPPLY AIR FIRE STAT OPTIONAL CONTROL CIRCUIT TRANSFORMER FUSE KEYPAD DISPLAY MODULE OPTIONAL BURNER ON fore To Do Not Ground Transformer Use Only Shielded Signal Conductors N O TR 05 30 24 zo p m DDC Control rep e ha TR 04 0 10 vdc VG 07 2 202 Input FAN ON LIGHT REMOTE COOLING ON LIGHT REMOTE CLOGGED FILTER LIGHT REMOTE CUSTOMER EXHAUST FAN INTERLOCK JUMPER IF NOT USED FU 09 TO LINE BLOCK OPTIONAL TR 01 p FL 05 FL 06 103 101 5 19 24 VAC OR DISCONNECT SWITCH UNIT ENABLE POTENTIOMETER OPTIONAL MAIN SUPPLY FAN MOTOR MOTOR LOW GAS PRESSURE SWITCH OPTIONAL HIGH GAS PRESSURE SWITCH OPTIONAL HIGH VELOCITY SWITCH LOW VELOCITY SWITCH CLOGGED FILTER SWITCH OPTIONAL BURNER RELAY CLOGGED FILTER RELAY OPTIONAL 7 DAY TIME CLOCK OPTIONAL ELECTRONIC RELAY MAIN GAS VALVE RELAY COOLING ENABLE RELAY COOLING INTERLOCK RELAY BURNER ENABLE RELAY SAFTEY CIRCUIT STATUS RELAY UNIT ENABLE RELAY FAN STATUS RELAY EXHAUST INTERLOCKING
10. FREEZE STAT OPTIONAL CONTROL MEE msn IGNITION TR MODULATING VALVE y ANTE LOW VOLTAGE PILOT GAS VALVE MAIN GAS VALVE AUXILARY GAS VALVE NOBMALLY OREN VENT VALVE OPTIONAL GAS VALVE DRAIN VALVE OPTION 3 WAY FILL VALVE OPTIONAL 10 Y KECE Spi 59 9 52 RECIRCULATING TFL MODEL DIAGRAM COMPONENT IDENTIFICATION BM 01 99 FL 01 FL 02 FL 04 FL 05 X4 700 MODULATING BURNER CONTROL CIRCUIT TRANSFORMER BREAKER FAN SWITCH HIGH TEMPERATURE LIMIT SWITCH MANUAL RESET HIGH LIMIT SWITCH OPTIONAL SUPPLY AIR FIRESTAT OPTIONAL RETURN AIR FIRESTAT COP TIONAL CONTROL TRANSFORMER FUSE COMBINATION CO amp NO2 DETECTOR OPTIONAL CARBON DIOXIDE DETECTOR OPTIONAL KEYPAD DISPLAY MODULE OPTIONAL BURNER ON LIGHT OPTIONAL FAN ON LIGHT OPTIONAL COOLING ON LIGHT OPTIONAL CLOGGED FILTER LIGHT OPTIONAL DAMPER CONTROL POTENTIOMETER OPTIONAL UNIT ENABLE POTENTIOMETER OPTIONAL MAIN SUPPLY FAN MOTOR BURNER MOTOR MODULATING GAS VALVE MOTOR DAMPER MOTOR OPTIONAL MAIN FAN MOTOR OVERLOAD BURNER AIRFLOW PROVING SWITCH LOW GAS PRESSURE SWITCH OPTIONAL HIGH GAS PRESSURE SWITCH OPTIONAL CLOGGED FILTER SWITCH OPTIONAL BUILDING PRESSURE TRANSDUCER OPTIONAL FLAME SAFEGUARD RELAY PURGE HOLDING RELAY CLOGGED FILTER RELAY OPTIONAL 7 DAY TIME CLOCK
11. a No See the Diagnostic section for Unit On Fan Off b Yes Continue SOLUTION If fan is running check prior alarm log 1 Is the high temperature limit tripped a Yes Determine cause and rectify b No Continue 2 Is the low gas pressure switch closed a No Verify the inlet gas pressure is as specified on the gas piping diagram The low gas pressure switch setpoint should not be adjusted The inlet gas pressure must remain as specified when unit fires at full input Correct gas pressure and reset switch If the switch cannot be reset replace it See Installation Operation and Owners Manual for more information b Yes Continue 3 Isthe high gas pressure switch closed a No Verify the firing rate pressure at full input is as specified on the unit rating plate The high gas pressure switch setpoint should not be adjusted The firing rate pressure must remain as specified when unit fires at full input Correct gas pressure and reset switch If the switch cannot be reset replace it See Installation Operation and Maintenance Manual for more information b Yes Continue 4 Isthe safety circuit relay energized a No Check for loose wiring and rectify b Yes Continue 5 Is safety circuit relay s normally open contact closed a No Replace the relay b Yes Continue 6 Is there continuity at the controller between the safety status terminals a No There is an open in the wiring between these terminals Determ
12. CONTROL CIRCUIT TRANSFORMER IGNITION TRANSFORMER NOCHLATING VALVE TRANSFORMER LOW VOLTAGE DANPER MOTOR TRANSFCALER OPTIONAL OUTSIDE SPACE poma OISCHARGE AIR SOR 25 TO NEXT TO NEXT 25 PAGE UNIT CONTROL MODULE PILOT GAS VALVE MAIN GAS VALVE AUXILARY GAS VALVE NORMALLY vie VALVE OPTIONAL MODULATING C Lyc way rh me VO ZONE 583 SHIELDED CABLE NON RECIRCULATING TMM MODEL DIAGRAM EXHAUST FAN INTERLOCK MM Eg E 51 01 s PLOT DUTY RATED INTERLOCKING RELAY Rotor SERVIGNG EQUIPMENT CONTROL CIRCUIT TRANSFORMER BREAKER d pun 200 230 400 575 EE RETURN AIR PNESTAT OP TONN 3 PHASE NOTOR I Fuse 60 COMBINATION amp NO2 DETECTOR OPTIONAL 3 KEYPAD DISPLAY MODULE OPTIONAL gu uer REMOTE BURNER RU INTE UNIT ENABLE POTENTIOMETER MAIN Y Mi DAMFER MOTOR OPTONAL DAMPER MOTOR OPTIONAL EVAP PUMP MOTOR MAIN FAN MOTOR OVERLOAD e CAS SWITCH OPTION GAS PRESSURE Su TOM SWITCH LOW VELOCITY SWI CLOGGED FILTER SWITCH OPTIONAL FLAME EM RELAY RESISTOR B 06K RESISTOR 10 OMM MAIN SUPPLY FAN MOTOR STARTER OF NAME OPTIONAL WA ANS pus OPTIONAL IT THERMOSTAT lesne
13. PILOT DUTY RATED 34 33 50 be 32 RECIRCULATING and TMM MODEL DIAGRAM EXHAUST INTERLOCK ALARM STATUS 65 51 01 a 09 PLOT DUTY RATED INTERLOCKING RELAY ae CUSTOMER CON INTERLOCK CAMPER F NOT USED O4 LOW GAS PRESSURE SWITCH GAS PRESSURE gon guum BEFORE SERVONG EQUIPMENT OONTROL CRCUT TRANSFORMER BREAKER ATURE UMIT 1 Epic pun 200 230 480 575 VAT lt gt OL CRCUT er PUMP MOTOR FUSE 3 PHASE 60 HERTZ 7 COMBINATION CO amp NOZ DETECTOR OPTIONAL KEYPAD DISPLAY MODULE OPTIONAL PIE ON RENOTE BURNER FAN F4 02 Udit EMOTE d 2 SE en gt a a INLET DAMPER MOTOR ERO MIXING BOX DAMPER MOTOR i EVAP PUMP MOTOR MAIN FAN MOTOR OVERLOAD SW TOR hd FLIER S OPTIONAL FLOW Flow STAMEN PRESSURE TRA TRANSDUCER ert ee Tonan r n RA pim Ai Yapar rs TRONC STA fer ENABLE RELA FLA T is Reu en 190 77 E PS M gate FAN STA RE 14 4 SWITCHING RELAY 4 tow ALERT Pa MED m TA AL ALARM STATUS RESISTOR UE RESISTOR 11 MAIN SUPPLY FAN MOTOR STARTER WEN ps Seren ORAIN SMICH OPTIONAL NIGHT OPTIONAL FREEZE STAT
14. The fan count has now been cleared and the Fan Count function has been rearmed HEATING COUNT Heating Count records each burner start To reset a heating count scroll through the menu tree locate the Unit Resets branch and select Heating Count Press the Enter key The word OFF should flash Now press the INC key and the word ON should flash on the display Press the Enter key again and ON should stop flashing Repeat this process so the word OFF is displayed and not flashing The heating count has now been cleared and the Heating Count function has been rearmed COOLING COUNT Cooling Count records each cooling start To reset a cooling count scroll through the menu tree locate the Unit Resets branch and select Cooling Count Press the Enter key The word OFF should flash Now press the INC key and the word ON should flash on the display Press the Enter key again and ON should stop flashing Repeat this process so the word OFF is displayed and not flashing The cooling count has now been cleared and the Cooling Count function has been rearmed 26 Multiplexed Inputs DDC controllers are designed with a finite number of inputs and outputs Multiplexing expands the functionality of the controller by allowing multiple devices to effectively share the same input This is usually accomplished by connecting resistors either in a series or parallel configuration to an analog input A switch is used in conjunction with each resistor When a sw
15. terminals that are connected to the transducer a Yes There is a problem with the controller Replace it b No There is an open in the wiring between these pressure transducer and the TracRite controller terminals Locate and rectify SOLUTION If less outside air is desired 1 Is heat required a Yes The TracRite control system must be in the Heating mode In this mode the smallest allowable amount of outside air is 20 Verify the system is in the Heating mode and the MIN VENT SP is set for 20 See Heating Cooling Mode and Minimum Ventilation Sections of this manual b No Continue 2 Is cooling or ventilation required a Yes The TracRite control system must be in the Ventilation Cooling mode In this mode the smallest allowable amount of outside air is 0 Verify the system is in the Cooling mode and the MIN VENT SP is set for the desired percent of outside air See Heating Ventilating Cooling Mode and Minimum Ventilation Sections of this manual b No Contact factory Glossary BACview The BACview is a four line by forty character display used to change setpoints and monitor the unit s operation See Local User Interface Equivalent temperature rise Simply stated this value is the actual temperature rise generated by the unit at any given time More precisely stated it is the quantity of outside air raised to the discharge air temperature plus the quantity of return air raised to the discharge air temperature
16. 20 MRT Pro Controls rrnvrrrnvnrnnvrrrnvnrennresnvnrennrssnvennnressvrrsnnrsssvnrsnnrsssvssennrsssnsrennssssvssnnnssssvssennsssnn 20 MRT Expert Control ios e tee ente o EE i e eee aec OR PER 21 Building Pressure eroe errori ern ae ee eH 21 and MRT Pro Controls cccccsccccssccssscesscecsecesscececeeseccseceeseecsueseeseecsaeceeeeecsaeceeeeecsaeseeseecsaeseeeeess 21 hedrer aute A D EROS 21 700 Outside Air 21 Minimum Ventilation ccm 21 1 1 22 DIRECTOR ie 23 EAN 24 Unit Pesets mun 26 RE 26 26 MN 26 HEATING COUNT 26 COOLING RE 26 Multiplexed Inputs 27 COCK SO rende 27 Diagnostics Critical Fault Codes 27 FAULT CODE Low Discharge Temperature eese 27 SOLUTION If burner was operating prior to shutdown check prior alarm 09 27 SOLUTION If burner was not operating prior to shutdown check prior alarm 106 29 FAULT CODE Safety Circuit 30 SOLUTION If fan is not running check prior alarm 30 SOLUTION If fan is running check pr
17. 24VAC is powering the damper actuator and the control signal is 10VDC the outside air damper should be fully open and the return air damper should be closed 5 Is there approximately 24VAC at the COM and EXC terminals on the airflow station pressure transducer a Yes Continue b No Is there 120VAC on the primary side of the low voltage transformer and 24V AC volt at the transformer secondary 1 Yes There is an open in the wiring between the transformer and the transducer Locate the wiring problem and rectify 2 No If there is 120VAC on the primary and on the secondary replace the transformer If there is on the primary there is an open in the wiring supplying power to the transformer Locate the wiring problem and rectify 6 Remove both of the plastic tubes from the airflow station pressure transducer and gently blow into the HIGH side port Caution The transducer is 37 extremely sensitive Blowing hard into sensing tube may damage the transducer Is there approximately 5VDC across the COM and OUT terminals of the pressure transducer a Yes Continue b No The pressure transducer is defective Replace it 7 Remove both of the plastic tubes from the airflow station pressure transducer and gently blow into the HIGH side port Caution The transducer is extremely sensitive Blowing too hard into the sensing tube may damage the transducer Is there approximately 5VDC across the controller input
18. 65 01 eu E pie pr We pd VO ZONE 583 RE 65 28 E Foy TAN 1 arven o n RS Phot Hise mes 4 TT mof RENS DR otes Np In 12 ASW 09 z EE n ro FT SHIELDED GABLE 206 34 205 RE 28 204 O RE 57 pone forbs gus a ueo 94 1 i i f H 85 02 LL RS 01 1 j 7 0 Not Gr 4 ot Groun AN Transformer Use Only COMPONENT IDENTEICATION RECON Shielded Signal Conductors TR 05 2 UU 8 30 24 FL 02 HIGH TEMPERATURE LIMIT SWITCH Spey An SUN DDC Contro 2209 Eee JUMPER IF NOT USED FU 09 CONTROL CIRCUIT TRANSFORMER FUSE 0 10 202 vc 07 Input 134 KP 01 KEYPAD DISPLAY MODULE OPTIONAL 17 05 BURNER ON LIGHT REMOTE 1 15 ON LIGHT REMOTE LT 31 COOLING ON LIGHT REMOTE FL 05 FL 06 50 19 24 vag 1 89 CLOGGED FILTER LIGHT REMOTE Y TNT HALE AOGCEDING LA 05 DAMPER CONTROL POTENTIOMETER OPTIONAL TO THE LATEST PROVISIONS OF NEC 15 UNIT ENAB
19. ARCnet LonWorks and Ethernet using plug in communications board USER INTERFACE MDT modulating discharge temperature control with manually adjusted potentiometer at remote control panel MRT modulating room temperature control with manually adjusted potentiometer at remote control panel MRT Pro modulating room temperature control with intelligent room thermostat MRT Expert modulating room temperature control with intelligent room sensor and BACview LCD control panel VDT Expert variable discharge temperature control with BACview LCD control panel MEMORY bytes of flash memory and 512 bytes of non volatile battery backed RAM REALTIME CLOCK Battery backed to keep time in event of power failure TEMPERATURE OPERATING RANGE 0 to 130 F 10 to 95 RH non condensing INPUTS OUTPUTS 8 Universal Inputs e Inputs 1 amp 2 o Dry thermistor 0 5VDC e Inputs3 6 o Dry thermistor Zone 583 Controller Specifications e Inputs7 amp 8 o 1k 10k pot 5 Digital Outputs Relay contacts rated at 1A Resistive 24VAC LED indication 3 Analog Outputs e 0 10 VDC OUTPUT ASSIGNMENTS ANALOG AOI Burner gas firing rate 0 10 VDC AO2 RA or Mixing Damper Control User Configured 0 10VDC AO3 Burner gas firing rate OUTPUT ASSIGNMENTS DIGITAL Unit Enable DO2 Burner Enable DO3 Stg 1 Cooling Enable 4 Stg 2 Cooling Enable DOS Pilot to Main Flame Sensor Changeover Switch INPU
20. Cooling Economizer setpoint To change the desired cooling economizer temperature scroll through the SETPOINTS menu tree locate the COOLING ECONOMIZER Setpoint and enter a new temperature The default for this setpoint 15 55 F The allowable temperature range is 40 F 130 F 19 Damper Control Modes There are four different modes that control the unit damper operation Manual Mixed Air Temperature Building Pressure and 100 Outside Air Except for the 100 Outside Air mode these operating modes are selected through the menu tree of local user interface or PC Not all damper modes are available on all units Outside air dampers will remain in their minimum position during the unoccupied period Manual Mode Manual Mode is the default damper operational mode This will set the outside air damper to a fixed position MDT MRT and MRT Pro Controls To place the damper operation in Manual Mode on an MDT MRT or MRT Pro control system be sure the appropriate terminals in the unit control panel are not shorted See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information Rotate the damper control knob on the remote control panel to the desired percentage of outside air If the unit served by this control is a direct fired heater that recirculates air before the burner and is operating in the heating mode the unit will automatically keep the minimum outside air at 2090 If the outside air
21. Diagnostic section for the previous alarm b No Continue 2 Is the room air Room Temp displayed on the BACview remote reading 150 F or more a Yes The sensor circuit or the sensor itself is shorted Unplug the input jack from the TracRite controller Did the display change to 40 F or less 1 2 No There is a short in the controller input Replace the controller Yes Disconnect the sensor wiring at the sensor Connect an ohmmeter to the sensor If it is shorted replace the sensor At 70 F the resistance should be 10KQ See thermistor output curve for other temperatures If it is not shorted there is a short in the wiring between the sensor and the input plug Determine cause and rectify Refer to Appendix for a typical 10KQ thermistor output curve b No Continue 3 Is the discharge air temperature DA Tempt displayed on the BACview remote reading 40 F or less a Yes The discharge air temperature sensor circuit or the sensor itself is open Jumper the input for the sensor Did the display change to 150 F or more 1 2 No There is an open in the controller input Replace the controller Yes Disconnect the discharge air temperature sensor wiring at the sensor Connect an ohmmeter to the sensor If it is open replace the sensor At 70 F the resistance should be 10KQ See thermistor output curve for other temperatures If it is not open there is a break in the wiring between the sensor and the inp
22. Fame MN SNO RE 35 7 H LINE BLOCK Fu 09 OR OPTIONAL TI DISCONNECT SWITCH VG 03 OUTSIDE AIR TEMPERATURE SENSOR B Ken 25 36 30 ed Fe SPACE TEMPERATURE SENSOR OPTONAL 206 230 460 575 VOLT H kaso lt DISCHARGE AIR TEMPERATURE SENSOR 32 PSP EXHAUST FAN INTERLOCK 80 HERTZ ae ST 01 MAIN GAS VALVE ST 0 AUXILIARY GAS VALVE 3 WIRE Pee UD MODULATING GAS VALVE 49 NON RECIRCULATING CMA MODEL DIAGRAM ET uc 5142 Nw OH DY 85 05 65 04 Me pz We ASW 72 RS 02 65 01 po Wwe pr Ne pod 65 RE 28 pa RS 03 DA NN ss o ne ASW 99 9 gd 85 01 mr Ave pa 3 2 18 3 me LED BURNER CONTROL 204
23. In order of lowest to greatest priority the burner modulation parameters are room temperature discharge or supply air temperature and equivalent temperature rise There are three Energy Savings modes that could disable the burner Energy Savings Mode 1 Mixing Box Recirculating Units Energy Savings Mode 1 will automatically disable the burner if the mixed air temperature is equal to or greater than the minimum discharge air temperature setpoint and the room air temperature is 5 F above the room air temperature setpoint This function is intended to restrain the room temperature from rising uncontrollably in buildings with internal heat 13 gain In certain conditions it may be necessary to readjust minimum discharge air or room temperature setpoint upward or adjust the outside return air ratio to provide a warmer supply air temperature Energy Savings Mode 1 Non Recirculating Units Energy Savings Mode 1 will automatically disable the burner if the outside air temperature is equal to or greater than the minimum discharge air temperature setpoint and the room air temperature is 5 F above the room air temperature setpoint This function is intended to restrain the room temperature from rising uncontrollably in buildings with internal heat gain In certain conditions it may be necessary to readjust the minimum discharge air or room temperature setpoint upward to provide a warmer supply air temperature Energy Savings Mode 2 Mixing Box Rec
24. building TracRite has no preset operational schedule To set the operational times of the unit scroll through the SCHEDULES menu tree and locate the desired Daily Holiday or Override branch Enter the days and times for the unit to operate In the Daily or Override section these times should correspond to the desired times for the unit s operation In the Holiday section these times should correspond to the desired off times for the unit s operation For any schedule to function the Use tab must be set to yes To set the time clock function for 24 hour continuous operation scroll through the menu tree and locate the SCHEDULES page Set the 24 Hr Operation to yes Enter the Daily section of the menu and set the Use tab to yes Finally select the days for 24 hour operation See the CLOCK SET section of this manual for setting the time date and Daylight Savings function 11 Heating Night Setback The Heating Night Setback function automatically cycles the unit on if the room temperature falls below the Heating Setback temperature setpoint and the unit is scheduled to be off If the unit is scheduled to be off and the Heating Setback function turns the unit the unit will be cycled off once the room air temperature has risen 2 above the Heating Setback setpoint The default for this setpoint is 55 F To change the Heating Setback setpoint scroll through the SETPOINTS menu tree locate the Heating Setbac
25. discharge temperature control provides full information regarding unit operation and allows the user to adjust all operational parameters using the BACview panel UNIT OFF MODE Off Mode is the default unit operational mode To place the unit in Off Mode scroll through the Unit Modes menu tree locate the AUTO OFF MANUAL branch and select OFF This will place the unit in the OFF mode The OFF mode prevents the fan and burner from starting This mode will override the Time Clock function UNIT MANUAL MODE Manual Mode allows the supply fan to turn on regardless of the Time Clock function To place the unit in Manual Mode scroll through the Unit Modes menu tree locate the AUTO OFF MANUAL branch and select MANUAL This will place the unit in the MANUAL mode UNIT AUTO MODE Auto Mode has two different functions that control the supply fan and unit operation They are a time clock function and a signal from an external source to an auxiliary digital input To place the unit in Auto Mode scroll through the Unit Modes menu tree locate the AUTO OFF MAN branch and select AUTO This will place the unit in the AUTO mode This activates the four Auto mode functions 12 Scheduling Time Clock The primary Auto Mode function is the Time Clock Schedule The Time Clock function allows the user to schedule the operational times of the unit There are four different schedules available 24 hour continuous operation daily holiday and override The daily sch
26. drops below 20 the burner will cycle off See Minimum Ventilation If the unit served by this control is a direct fired heater that recirculates air after the burner it is designed to provide a minimum of 25 outside air Therefore the damper control knob on the remote control panel has no effect below 25 See Minimum Ventilation MRT Expert Control To place the damper operation in Manual Mode scroll through the menu tree locate the Damper Mode branch and select Manual Pos Next scroll through the menu tree locate the Setpoints branch select Man Vent SP and enter the desired damper position The allowable range is 096 to 100 If the unit served by this control is a direct fired heater that recirculates air after the burner the unit is designed to provide a minimum of 2596 outside air If the unit served by this control is a direct fired heater that recirculates air before the burner and is operating in the heating mode the unit will automatically keep the minimum outside air at 20 If the outside air drops below 20 the burner will cycle off See Minimum Ventilation Mixed Air Temperature Mode The Mixed Air Temperature mode varies the percentages of outside air and return air to maintain a constant mixed air temperature The TracRite controller computes the mixed air temperature using the outside air and return air temperatures and the ratio of their respective airflows Direct fired units that recirculate after the burner do not h
27. on all controls systems except the MDT and VDT EXPERT the control system cycles the cooling output to maintain the supply air temperature within a defined operating window This window defines the maximum and minimum discharge temperatures To change the desired minimum supply or discharge air temperature scroll through the SETPOINTS menu tree locate the CLG MIN DA Setpoint and enter a new temperature This temperature must not be greater than the CLG MAX DA Setpoint The allowable temperature range is 40 F 130 F This sets the lowest discharge air temperature that will leave the unit To change the desired maximum supply or discharge air temperature scroll through the SETPOINTS menu tree locate CLG MAX DA Setpoint and enter a new temperature This temperature must not be less than the CLG MIN DA Setpoint The allowable temperature range is 40 F 130 F This sets the highest discharge air temperature that will leave the unit If the maximum and minimum discharge temperature setpoints are set for the same temperature the supply air temperature will be the same as the setpoint regardless of the room temperature setpoint or actual room temperature Energy Savings Mode 4 Energy Savings Mode 4 will automatically disable the cooling if the outside air temperature is below the Cooling Economizer setpoint This function is similar to an inlet duct thermostat The cooling will cycle back on if the outside air temperature rises 3 F above the
28. open when the burner is off a No Disconnect both pressure sensing tubes from one of the airflow switches and measure the differential pressure by connecting the high sensing port of a manometer to one of the airflow sensing tubes and the low sensing port to the other Is the differential pressure approximately the midpoint between the high and low airflow switch setpoints 1 No Close the profile opening until the differential pressure is approximately the midpoint between the high and low airflow 35 switch setpoints Reconnect sensing tubes restart burner and verify the airflow switch remains closed when the burner is at the maximum rated input Continue 2 Yes Continue 2 Are all of the filters dirty a Yes Install clean filters and continue b No Continue 3 Does the external static pressure match that listed on the rating plate a No Verify all associated ductwork 15 installed as designed and there are no obstructions Continue b Yes Continue 4 Does the fan RPM match that listed on the Spec Sheet a No Correct to increased fan speed and continue b Yes Continue 5 Are the airflow switches sensing tubes obstructed a Yes Clear and continue b No Continue 6 Contact factory FAULT CODE Clogged Filter Switch PROBLEM The filter air pressure switch has closed between the appropriate terminals on the unit s terminal strip located in the unit s main control panel indicating a clogged filter S
29. operation resumes FAULT CODE Low Discharge Temperature PROBLEM The controller has detected a low temperature at the fan outlet and has shut off the unit See Freezestat section of this manual SOLUTION If burner was operating prior to shutdown check prior alarm log 1 Is the outside air OA Temp or room air Room Temp displayed on the BACview remote reading 150 F or more a Yes That sensor circuit or the sensor itself is shorted Unplug the input jack from the TracRite controller Did the display change to 40 F or less 1 No There is a short in the controller input Replace the controller 2 Yes Disconnect the sensor wiring at the sensor Connect an ohmmeter to the sensor If it is shorted replace the sensor At 77 F the resistance should be 10 See thermistor output curve for other temperatures If it is not shorted there is a short in the wiring between the sensor and the input plug Determine 27 cause rectify Refer to Appendix II for a typical 10 thermistor output curve b No Continue Is the discharge air temperature DA Temp displayed on the BACview remote reading 40 F or less a Yes That sensor circuit or the sensor itself is open Jumper the input for the sensor Did the display change to 150 F or more 1 No There is an open in the controller input Replace the controller 2 Yes Disconnect the sensor wiring at the sensor Connect an ohmmeter to the sensor If it is open replace th
30. the output voltage decreases Additionally a secondary control acts to override the PID loop to scale the output as follows If the input variable equals the User Control setpoint the output will be determined by the PID loop In this situation the override has no effect on the output value If the input variable is above the User Control setpoint the output could decrease from 100 to 0 as the input variable increases from the User Control setpoint to the Max User setpoint In this situation the output value is the lesser of the PID output or the override output If the input variable is below the User Control setpoint the output could increase from 0 to 100 as the input variable decreases from the User Control setpoint to the Min User setpoint In this situation the output value is the greater of the PID output or the override output See the following example 24 Assume user wishes to control fan speed using variable frequency drive The VFD input is 0 10Vdc The control variable will be building pressure As the building pressure increases the fan speed should decrease The building pressure transducer has a range of 0 1 to 0 1 The user would like the building pressure to be 0 03 but does not want it to drop below 0 0 or go above 0 05 The parameters entered on the keypad display will be PID Select Reverse as input increases output decreases High Input Val 0 10 Low Input Val 0 10
31. the appropriate terminals on the unit s terminal strip located in the unit s main control panel See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information This function can be used with a twist timer toggle switch door switch exhaust fan interlock or any other dry contact to override the time clock schedule MRT Expert Controls The TracRite MRT Expert modulating room temperature control provides full information regarding unit operation and allows the user to adjust all operational parameters using the BACview panel 10 UNIT OFF MODE Off Mode is the default unit operational mode To place the unit in Off Mode scroll through the Unit Modes menu tree locate the AUTO OFF MANUAL branch and select OFF This will place the unit in the OFF mode The OFF mode prevents the fan and burner from starting This mode will override the Time Clock and Night Setback functions UNIT MANUAL MODE Manual Mode allows the supply fan to turn on regardless of the Time Clock or Night Setback functions Heating and cooling functions use the Night Setback Setpoints To place the unit in Manual Mode scroll through the Unit Modes menu tree locate the AUTO OFF MANUAL branch and select MANUAL This will place the unit in the MANUAL mode UNIT AUTO MODE Auto Mode has four different functions that control the supply fan and unit operation They are a time clock function heating and cooling night setbacks and a signal fr
32. 00 9999 99 99999 99 Minimum User Setpoint 0 00 9999 99 99999 99 UNIT OPERATING MODES There are three different modes that control the supply fan and unit operation Off Manual Auto There are also four different methods for controlling the operating modes e a remote control panel with one or two rotating adjustment knobs MDT and MRT controls e anintelligent room sensor MRT Pro controls an intelligent room sensor and BACview panel with LCD display MRT Expert and VDT EXPERT controls e any of the above controls with an internet based WebCTRL interface or other 3 party building automation system MDT Controls MDT modulating discharge temperature is the most basic TracRite control for discharge temperature The MDT control system includes a remote control panel equipped with 1 or 2 potentiometers 3 or more pilot lights and up to 2 switches UNIT OFF MODE Off Mode 15 the default unit operational mode To place the unit in the Off Mode rotate the temperature setpoint knob on the remote control panel counterclockwise to the stop This will place the unit in the OFF mode and extinguish the on light The OFF mode prevents the unit from starting UNIT MANUAL MODE Manual Mode allows the unit to turn on To place the unit in the Manual Mode rotate the temperature setpoint knob on the remote control panel clockwise to the desired discharge air temperature setpoint This will place the unit i
33. Alarm e Resets e Help Htg Min DA F range 40 130 41 ALARM HOTKEY 1 Module Event History 100 Most Recent Active Alarms Active Faults Returned To Normal Manually Cleared Previous RESETS 6 Alarm Burner Reset Fan Count Cooling Reset Calibrate Home Schedules Clock Set Help SCHEDULES 7 24 hr Operation yes no Daily o Schedulel typical 1 through 4 Use yes no Start Time hr min Stop Time hr min DAYS SUN MON TUE WED THU FRI SAT Previous Next Home Logout vvvvvvvv Holiday o Holidayl typical 1 through 12 Use yes no Start Time hr min Stop Time hr min Month 1 12 Day 1 31 Previous Next Home Logout vvvvvvvvv Override o Overridel typical I through 2 Use yes no gt Start Time hr min gt Stop Time hr min Month 1 12 42 gt Day 1 31 gt Previous gt Next gt Home gt Logout CLOCKSET 0 Time hh mm ss e Date dd mm yy e Previous e DST Start Time hh mm o Amount 060 o Beg 112007 End Nov 04 2007 o Beg Mar09 2008 End Nov 02 2008 o Beg Mar08 2009 End Nov 01 2009 Beg 142010 End Nov 07 2010 Beg 13 2011 End 06 2011 o Beg 112012 End Nov 042012 Beg 102013 End Nov 03 2013 Beg 092014 End Nov 02 2014 Beg 082015 End 01 2015 o Beg 132016 End Nov 06 2016 Previous HELP HOTKEY 5 Fan Se
34. F 40 F 130 F Outside Temperature for 55 F 40 F 130 F Heating Cooling Changeover Setpoint VDT EXPERT Control Freezestat 45 F 35 F 80 F Heating Economizer Setpoint 65 F 40 F 130 F Cooling Economizer Setpoint 55 F 40 F 130 F Minimum Heating Discharge 55 F 40 F 130 F Temperature Setpoint Maximum Heating Discharge 100 F 40 F 130 F Temperature Setpoint Minimum Cooling Discharge 55 F 40 F 130 F Temperature Setpoint Maximum Cooling Discharge 75 F 40 F 130 F Temperature Setpoint Heating Discharge Setpoint 65 F 40 F 130 F VDT EXPERT Control Cooling Discharge Setpoint 73 F 40 F 130 F VDT EXPERT Control Remote Damper Position Setpoint 0 Outside Air 0 100 Mixed Air Temperature Setpoint 50 F 30 F 90 F Building Pressure Setpoint 0 W C 0 05 0 05 W Manual Damper Position Setpoint 20 Outside Air 0 100 Minimum Ventilation Setpoint 20 Outside 096 100 Manual Damper Position Setpoint 25 Outside Air 25 100 75 25 direct fired heaters Minimum Ventilation Setpoint 25 Outside Air 25 100 75 25 direct fired heaters Unit Model TFL20 TFL20 TFL40 TFL60 OTHER User PID Select Direct Acting DIRECT REVERSE High Input Value 0 00 9999 99 99999 99 Low Input Value 0 00 9999 99 99999 99 User Control Setpoint 0 00 9999 99 99999 99 Maximum User Setpoint 0
35. G The controller output is modulated by a PID loop from 0 to 100 based on the User Control setpoint and the input signal As the input signal increases the output voltage increases Additionally a secondary control acts to override the PID loop to scale the output as follows If the input variable equals the User Control setpoint the output will be determined by the PID loop In this situation the override has no effect on the output value If the input variable is above the User Control setpoint the output could increase from 0 to 100 as the input variable increases from the User Control setpoint to the Max User setpoint In this situation the output value is the greater of the PID output or the override output If the input variable is below the User Control setpoint the output could decrease from 100 to 0 as the input variable decreases from the User Control setpoint to the Min User setpoint In this situation the output value is the lesser of the PID output or the override output See the following example Assume the user wishes to control a chilled water valve using a temperature transducer The control variable will be supply air temperature As the supply air temperature increases the chilled water valve should open to lower the temperature The temperature transducer has a range of 50 F 85 F The user would like the supply air temperature to be 75 F but does not want it to drop below 70 F or go above 80 F The parameters ent
36. G RELAY UNIT ENABLE RELAY USER CONFIG INPUT 0 5 SHIELDED CABLE 231 DISCONNECT SWITCH 460 3 80 m BEFORE SERVICING EQUIPMENT Sw aot j ru m NER 5 y CAUTION rp UNIT SHALL GROUNDED ACCORDING TO THE LATEST PROVISONS OF NEC Fu i 115 Aaa TR O1 FU os RE 01 05 r3 29 E FU 08 RE 01 03 I 32 5 RE 57 57 01 PS 10 RE 65 RE 28 2 8 i 9 FROH 01 1872 OHM pod RE 05 RE 8 i iE sT 01 10 11 CLOSED CALL FOR HEAT BURNER CONTROL 55
37. It is equivalent to the heat actually delivered to the space The purpose for this the burner control scheme is to limit the burner s firing rate based the percentage of outside air and thus the carbon monoxide generated by the unit Expressed mathematically it is Teg Toa VoRA Local User Interface BACview or remote control panel See BACview and remote control panel PID Control or loop Proportional Integral Derivative a common control scheme used in modulating HVAC systems Remote Control Panel The remote control panel is a cover plate with one or more of the following controls and indicators unit enable remote temperature setpoint pot remote 38 damper control pot speed control switch fill drain switch fan clogged filter high speed low speed burner on cool on lights This cover plate fits on a standard 3 gang electrical switch box See Local User Interface WebCTRL web based graphical user interface which provides the user access to the unit via the internet 39 Menu Selection Tree for BACview This section will assist the user in navigating the menu functions of the control program For convenience Hotkeys are provided to allow the user to jump directly to a specific menu heading Simply press and hold the FN key While holding the FN key press the number key of the desired menu and it will appear The number key associated with the menu heading 15 sh
38. LE POTENTIDMETER OPTIONAL MAIN SUPPLY FAN MOTOR ST 01A 5 11 5 10 FL 02 PS O4 5 07 27 DAMPER MOTOR HI epe fS 87 qe Tu 1117 94 11118 LOW GAS PRESSURE SWITCH OPTIONAL 30 02 HIGH G S PRESSURE SWITCH OPTIONAL FIELD PURGE RE 28A HIGH VELOCITY SWTCH 111 1110 x Fe Ce LOW VELOCITY SWITCH CLOGGED FILTER SMTCH OPTIONAL LOCATION esos BUILDING PRESSURE TRANSDUCER OPTIONAL LG amp 1112 AIRFLOW PRESSURE TRANSDUCER OPTIONAL FLAME BURNER RELAY CLOGGED FILTER RELAY OPTIONAL SENSOR 7 7 DAY TIME CLOCK OPTIONAL RE 65 ELECTRONIC RELAY MAIN GAS VALVE RELAY RESH 55 COOLING ENABLE RELAY H H 19 COOLING INTERLOCK RELAY LT 31 BURNER ENABLE RELAY 8 SAFTEY CIRCUIT STATUS RELAY LT 15 559 UNIT ENABLE RELAY MESE C EE FAN STATUS RELAY 5 12 12 EXHAUST INTERLOCKING RELAY OPTIONAL t 2 RESISTOR 1K OHM EEE EEE EEE 4 1 59 gt Biot RESISTOR 2K OHM RESISTOR 4 02K OHM RESISTOR 8 06 OHM 13 RE 78 RESISTOR 10 OHM RE 57 H Fe 05 DE MAIN SUPPLY FAN MOTOR STARTER 96 To DDC MAIN DISCONNECT SWITCH OPTIONAL AUXIUARY UNIT ENABLE 1 25 Control DOOR SWITCH O A N C 100 OUTSIDE AIR SWITCH BY OTHERS GANG ST 01 NIGHT THERMOSTAT CAUTIDN OPEN MAIN us CONTROL CONTROL CIRCUIT TRANSFORMER brer CIRCUITS BEFORE SERVICING
39. MANUAL RESET HIGH LIMIT SMTCH OPTIONAL SUPPLY AIR FIRESTAT OPTIONAL RETURN AIR FIRESTAT OPTIONAL CONTROL TRANSFORMER FUSE COMBINATION CO amp NO2 DETECTOR OPTIONAL CARBON DIOXIDE DETECTOR OPTIONAL KEYPAD DISPLAY MODULE OPTIONAL BURNER ON LIGHT OPTIONAL FAN ON LIGHT OPTIONAL COOLING ON LIGHT OPTIONAL CLOGGED FILTER LIGHT OPTIONAL UNIT ENABLE POTENTIOMETER OPTIONAL MAIN SUPPLY FAN MOTOR BURNER MOTOR MODULATING VALVE MOTOR DAMPER MOTOR OPTIONAL MAIN FAN MOTOR OVERLOAD BURNER AIRFLOW PROVING SWITCH LOW GAS PRESSURE SWITCH OPTIONAL HIGH GAS PRESSURE SWITCH OPTIONAL CLOGGED FILTER SWITCH OPTIONAL FLAME SAFEGUARD RELAY PURGE HOLDING RELAY CLOGGED FILTER RELAY CDE TIONAL 7 DAY TIME CLOCK OPTIONAL BURNER ENABLE RELAY COOLING ENABLE RELAY COOLING INTERLOCK RELAY SAFTEY CIRCUIT STATUS RELAY UNIT ENABLE RELAY FAN STATUS RELAY INTERLOCKING RELAY OPTIONAL LOW ALERT RELAY OPTIONAL HIGH ALERT RELAY OPTIONAL 02 ALARM RELAY OPTIONAL RESISTOR 1K OHM RESISTOR 2K OHM RESISTOR 4 02 OHM RESISTOR 8 06 OHM RESISTOR 10 OHM SUPPLY AIR SMOKE DETECTOR Gerona RETURN AIR SMOKE DETECTOR OPTIONAL MAIN SUPPLY FAN MOTOR STAR MAIN DISCONNECT SWITCH OPTIONAL AUXILLARY UNIT ENABLE BY OTHERS DAMPER MOTOR END SWITCH OPTIONAL 100 PERCENT OUTPUT SWITCH BY OTHERS NIGHT SETBACK THERMOSTAT TIONAL CONTROL CIRCUIT TRANSFORMER LOW VOLTAGE TRANSFRMER BURNER TRANSFOR
40. MER OUTSIDE AIR TEMPERATURE SENSOR SPACE TEMPERATURE SENSOR OPTIONAL DISCHARGE AIR TEMPERATURE SENSOR UNIT CONTROL MODULE MAIN VALVE TO NEXT PAGE COOLING INTERLOCK RE BO RE 35 H H 3 200 230 460 575 3 PHASE 60 HERTZ 5 WRE CAUTION OPEN MAIN DISCONNECT SWITCH BEFORE SERVICING EQUIPMENT CUSTOMER EXHAUST FAN INTERLOCK JUMPER IF NOT USED SW 01 5 E FERT ST 01 FU 10 FI 1 TC 09 18 L 5 FL 02 BL RE 06 GH HA EH He BK E MT 11 333 maxo BURNER CONTROL ENCLOSURE 5 12 202 DDC 209 YL RE 06 2 SPARK Q r gt PLOT ASSEMBLY ET 59 Re af d CONTROL SENSE FR RE 02 5 50 02 3 16 8 FL 01 OFF 90 MT 13 1 06 ON 125 uL Lt 12
41. OPTIONAL BURNER ENABLE RELAY COOLING ENABLE COOLING INTERLOCK RELAY SAFTEY CIRCUIT STATUS RELAY UNIT ENABLE RELAY FAN STATUS RELAY INTERLOCKING RELAY OPTIONAL LOW ALERT RELAY OPTIONAL HIGH ALERT RELAY CO2 ALARM RELAY OPTIONAL RESISTOR 1K OHM RESISTOR 2K OHM RESISTOR 4 02K OHM RESISTOR 8 06K OHM RESISTOR 10 OHM SUPPLY AIR SMOKE DETECTOR OPTIONAL RETURN AIR SMOKE DETECTOR OPTIONAL MAIN SUPPLY FAN MOTOR STAR MAIN DISCONNECT SWITCH OPTIONAL AUXILLARY UNIT ENABLE BY OTHERS DAMPER MOTOR END SWITCH OPTIONAL 100 PERCENT OUTSIDE AIR SWITCH BY OTHERS NIGHT THERMOSTAT CONTROL CIRCUIT TRANSFORMER LOW VOLTAGE TRANSFRMER BURNER TRANSFORMER OUTSIDE AIR TEMPERATURE SENSOR SPACE TEMPERATURE SENSOR OPTIONAL DISCHARGE AIR TEMPERATURE SENSOR UNIT CONTROL MODULE MAIN GAS VALVE COOLING INTERLOCK SW 01 aot 200 230 480 575 VOLT 3 PHASE 2 of pare CAUTION OPEN MAIN DISCONNECT SWITCH 60 HERTZ 2 25 306 ST 01 BEFORE SERVICING EQUIPMENT SEMINE CUSTOMER EXHAUST FAN INTERLOCK JUMPER IF NOT USED pj 10 1 T 70 09 sro i eo bi PPM ex p RE 21 NO RE 28 FL 02 292 BN 01 TR 08
42. RELAY OPTIONAL RESISTOR 1K OHM RESISTOR 2K OHM RESISTOR 4 02 RESISTOR 8 06 OHM RESISTOR 10 MAIN SUPPLY FAN MOTOR STARTER MAIN DISCONNECT SWITCH OPTIONAL AUXILIARY UNIT ENABLE OTHERS DAMPER INTERLOCK SWITCH DOOR SWITCH 100 OUTPUT SWITCH BY OTHERS NIGHT SETHACK THERMOSTAT CONTROL CIRCUIT TRANSFORMER MODULATING VALVE TRANSFORMER LOW VOLTAGE TRANSFRMER OUTSIDE AIR TEMPERATURE SENSOR SPACE TEMPERATURE SENSOR ORDNA DISCHARGE AIR TEMPERATURE SENSOR UNIT CONTROL MODULE MAIN GAS VALVE AUXILIARY GAS VALVE MODULATING GAS VALVE 208 230 460 575 VOLT ST 01A 5 5 10 FL 02 PS O4 5 07 27 UNIT SHALL BE GROUNDED ACCORDING TO THE LATEST PROVISIONS OF NEC 02 het 11 A Fe IU FIELD PURGE VG 03 VG 02 110 TIMER LOCATION RE 56 Ce RE 27 112 FLAME SENSOR J RE 57 lt MT 13 CAUTION OPEN MAIN DISCONNECT SWITCH BEFORE SERVICING EQUIPMENT SW 01 TO CONTROL CIRCUITS ISW 18j ST 01 COOLING INTERLOCK EXHAUST INTERLOCK RELAY RE 35 23 H be 236 51 3 80 HERTZ 2 ST 01 5 WIRE EXHAUST FAN INTERLOCK 57 01
43. T ASSIGNMENTS UNIVERSAL IN1 Pressure Transducer for Building Pressure Control or User Configured IN2 Pressure Transducer for Flow Station IN3 Multiplexed 100 Outside Air 100 Output Flame Failure Alarm e Safety Circuit Status Manual Mixed Air Dmpr Control INA Multiplexed Auxiliary Unit Enable Clogged Filter Fan Status Burner Status INS Outside Air sensor IN6 Discharge Air sensor IN7 Unit Enable Remote Setpoint IN8 Damper Control RNET or Room Air sensor Appendix IV MRT Pro Setpoint Explanation The MRT Pro displays three separate setpoints Pressing the INFO button on the MRT Pro will display the Heating and Cooling setpoints The default setpoints are 65 F for heating and 73 F for cooling These setpoints can only be changed with a BACview or PC and are unaffected by any changes made on the MRT Pro A third setpoint is displayed on the MRT Pro whenever the WARMER or COOLER button is pressed The display simply shows this as SETPOINT This SETPOINT will always be the midpoint between the Heating and Cooling setpoints Initially the SETPOINT will be 69 F It is best to think of the SETPOINT as the target room temperature setpoint because it is half way between the Heating setpoint and the Cooling setpoint The target SETPOINT can be adjusted 10 F by pressing the WARMER or COOLER button Each press moves the SETPOINT 1 Adjusting the target SETPOINT increases or decreases the Heating and Cooling setpoints di
44. User Ctrl SP 0 03 Max User SP 0 05 Min User SP 0 00 Max User SP 05 096 override Scaler 03 100 User Ctrl SP 03 PID 0 100 0 100 Output 037 0 override Scaler Input 03 00 100 Min User SP The pressure transducer compares the pressure outside the space to the pressure inside the space and transmits a corresponding signal to the TracRite controller The controller compares this signal to the desired user control setpoint 0 03 and uses the PID loop to modulate the output from 0 100 0 10Vdc The output is connected to the that changes speed to maintain the specified building pressure If the building pressure is 0 03 the output from the controller will be determined by the PID control sequence and the override will have no effect on the output If the building pressure is more than 0 03 the output from the controller will be determined by the PID control sequence or the override whichever is less If the building pressure is less than 0 03 the output from the controller will be determined by the PID control sequence or the override whichever is more 25 Unit Resets This section should assist the user in resetting alarms and cycle counters which have been displayed on the BACview ALARM To reset an alarm scroll through the menu tree locate the Unit Resets branch and select Alarm Press the Enter key The word OFF should flash Now press the INC key and th
45. ave mixed air temperature control MDT MRT and MRT Pro Controls To place the damper operation in Mixed Air Temperature Mode on an MDT MRT or MRT Pro control system be sure the appropriate terminals in the unit control panel are 20 shorted See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information Rotate the damper control knob on the remote control panel to the desired mixed air temperature The allowable range is 55 F 90 F If the unit served by this control is a direct fired heater that recirculates air before the burner and is operating in the heating mode the unit will automatically keep the minimum outside air at 2096 If the outside air drops below 20 the burner will cycle off See Minimum Ventilation MRT Expert Control To place the damper operation in Mixed Air Temperature Mode scroll through the menu tree locate the Damper Mode branch and select MA Temp Ctrl Next scroll through the menu tree locate the Setpoints branch select Mixed Air and enter the desired temperature The allowable range is 30 F 90 F If the unit served by this control is a direct fired heater that recirculates air before the burner and is operating in the heating mode the unit will automatically keep the minimum outside air at 2096 If the outside air drops below 20 the burner will cycle off See Minimum Ventilation Building Pressure Mode The Building Pressure mode varies the percentages of outside a
46. ble output because the percentage of outside air has dropped below 20 for more than five minutes and the unit is in the Heating mode SOLUTION If heat is desired 1 Are the outside air hood filters or bird screen or any associated outside air ductwork obstructed a Yes Clear obstruction or change filters b No Continue 2 Are the outside air and return air dampers and actuators working properly a Yes Continue b No Make necessary adjustments and force the unit to recalibrate See Calibrate in the Resets Section of this manual 3 Are the flow measuring station tubes and pressure tubing clear a Yes Continue b No Clean and force the unit to recalibrate See Calibrate in the Resets Section of this manual 4 Do the dampers track with a change in OA setpoint The dampers utilized on the unit are not linear with respect to airflow and openness and as such the proportion of outside air damper movement will not be exactly equal to the OA setpoint However at 20 OA the dampers should be approximately 2 open a Yes Continue b No Check damper motor and linkage connections When 24VAC is powering the damper actuator and the control signal is the outside air damper should be close to a rattle tight position and the return air damper should be open If the 24VAC power is removed actuator will draw the outside air damper tightly closed and the return air damper tightly open When
47. chematic and Multiplexed Input sections of this manual for more information The 100 Outside Air function overrides all other damper control functions See User Configured PID Control for use with non recirculating units Minimum Ventilation To change the Minimum Ventilation requires the use of a BACview or PC The Minimum Ventilation function defines the minimum outside air percentage and automatically prevents the dampers from modulating below this point This function can be used in 21 heating or cooling mode If unit served by this control is a direct fired heater recirculates air before the burner and is operating in the heating mode the unit will automatically keep the minimum outside air at 2096 If the outside air drops below 20 the burner will cycle off To specify the Minimum Ventilation scroll through the menu tree locate the Setpoints branch and select Min Vent and enter the desired outside air percentage The allowable range is 0 100 outside air By physical design direct fired heaters that recirculate air after the burner supply a minimum of 25 outside air Freezestat The Freezestat function automatically cycles the unit off if the supply air temperature drops below the Freezestat setpoint for 3 continuous minutes On all units there 15 an initial 8 minute delay prior activation The Freezestat function prevents the unit from starting The default for this setpoint is 45 F To change the Freezestat setpoi
48. contact closed a No Replace relay b Yes Continue 5 Is the motor overload relay tripped a Yes Determine cause rectify and reset b No Continue 6 Is the motor starter energized a No There is an open or break in the wiring Determine cause and rectify b Yes Check motor and motor wiring FAULT CODE Check Airflow Switches PROBLEM The controller has activated the unit enable output to start the fan and detected that the fan is running from a signal at the fan status input Subsequently the controller has detected several short momentary openings of the fan status input The momentary openings must occur at least 4 times within 15 seconds This fault requires the operator to correct the condition and reset the alarm before normal unit operation resumes SOLUTION If high airflow switch is opening Do not adjust the switch setpoints 1 Are all of the filters in place a No Install filters and continue b Yes Continue 2 Does the external static pressure match that listed on the rating plate a No Verify all associated ductwork is installed and continue b Yes Continue 3 Does the fan RPM match that listed on the Spec Sheet a No Correct to reduced fan speed and continue b Yes Continue 4 Arethe airflow switches sensing tubes obstructed a Yes Clear and continue b No Continue 5 Contact factory SOLUTION If low airflow switch is opening Do not adjust the switch setpoints 1 Does low airflow switch
49. cycle to maintain a constant room temperature The cooling outputs are protected by an anti cycle timer which has a 3 minute off 3minute on delay Additionally the fan is required to be running before the output is enabled MDT and VDT EXPERT controls do not have a room sensor However for these control types the control program uses 452 as the default room temperature 18 R A U R E To change desired cooling temperature of an control system rotate temperature setpoint knob on the remote control panel clockwise to the desired temperature The allowable temperature range is 55 F 90 F The cooling will be disabled when the temperature drops to the Cooling Setpoint To change the desired cooling room temperature of an MRT Pro control system depress the Warmer button to increase the desired room temperature setpoint or depress the Cooler button to decrease the desired room temperature setpoint Each push of a button changes the temperature setpoint by 1 F The setpoint be changed a maximum of 10 F from the default of 69 F To change the desired cooling room temperature of an MRT Expert control system scroll through the SETPOINTS menu tree using the BACview locate the Occupied Cooling Setpoint and enter a new temperature The allowable temperature range is 40 F 130 F The burner will modulate using a PID loop to maintain this temperature Additionally
50. e the Occupied Heating Mode allows the burner to operate as needed and is activated whenever the room or outside air temperature is 2 F below the heating setpoint During the Unoccupied Heating Mode the burner is activated whenever the room or outside air temperature is at the heating setpoint and is deactivated 2 F above the heating setpoint MDT and VDT EXPERT controls do not have a room sensor However for these control types the control program uses 45 F as the default room temperature General Burner Control In the Heating Mode the burner will modulate to maintain a constant temperature To change the desired heating discharge or room temperature of an MDT or MRT control system rotate the temperature setpoint knob on the remote control panel clockwise to the desired temperature The allowable temperature range is 55 F 90 F To change the desired heating room temperature of an MRT Pro control system depress the Warmer button to increase the desired room temperature setpoint or depress the Cooler button to decrease the desired room temperature setpoint Each push of a button changes the temperature setpoint by 1 F The setpoint can be changed a maximum of 10 F from the default of 69 F Refer to Appendix for more details on MRT Pro setpoint details To change the desired heating room temperature of an MRT Expert control system scroll through the SETPOINTS menu tree using the BACview locate the Occupied Heating Setpoint and enter a new te
51. e word ON should flash on the display Press the Enter key again and ON should stop flashing Repeat this process so the word OFF is displayed and not flashing The alarm has now been cleared and the Alarm RS function has been rearmed CALIBRATE The Calibrate function forces the controller to recalibrate the return air flow station The recalibration will occur immediately if the fan is running or at the next fan start To recalibrate scroll through the menu tree locate the Unit Resets branch and select Calibrate Press the Enter key The word OFF should flash Now press the INC key and the word ON should flash on the display Press the Enter key again and ON should stop flashing Repeat this process so the word OFF is displayed and not flashing The calibration has now been initiated and the Calibration function has been rearmed The Calibrate function will occur automatically each day At 3 00 AM a flag is set within the controller This flag instructs the controller to recalibrate the return air flow station immediately if the fan is running or at the next fan start FAN COUNT Fan Count records each fan start To reset a fan count scroll through the menu tree locate the Unit Resets branch and select Fan Count Press the Enter key The word OFF should flash Now press the INC key and the word ON should flash on the display Press the Enter key again and ON should stop flashing Repeat this process so the word OFF is displayed and not flashing
52. e sensor At 779 the resistance should be 10 See thermistor output curve for other temperatures If it is not open there is a break in the wiring between the sensor and the input plug Determine cause and rectify b No Continue Reset the alarm Check and note the DC voltage at output for the gas valve modulation Set the Heating Setpoint for 9130 F Set the MAX DAT and MIN DAT Setpoints for 130 F Did the Burner VDC displayed on the BACview remote increase a No Unless the outside air temperature is extremely warm the Burner VDC should have increased to 7 5VDC or more Close the manual main gas valve closest to the burner and measure the discharge air temperature Is it less than 130 F 1 Yes There is a problem with the controller program or controller itself Contact the factory 2 No The outside air temperature is too hot to determine the actual cause of the problem Reset the alarm and recheck when the outside air temperature is much cooler b Yes This signal is fed to the gas valve modulation signal conditioner Disconnect the wires from input signal terminals on the signal conditioner and measure the voltage on the wires Is it the same as the voltage coming from the controller 1 No There is an open in the wiring from the controller output Correct wiring and reconnect the wires to the terminals on the signal conditioner Be sure the ground wire from the controller output terminal is connected to the signal conditio
53. e system s diagnostic capabilities provide the user with up to the minute status reporting BACview service module or WebCTRL internet connection is required for these features NETWORKING TracRite is adaptable to a variety of different network architectures and protocols Each controller has built in protocol translation and can be configured for operation on ARCnetl56 or EIA 485 communication networks See Appendix III for specific controller specifications The TracRite system can be connected to most existing building automation systems Some systems may require the use of special controllers and network communication devices TRACRITE DEFAULT SETTINGS The following is a list of TracRite DDC controller defaults These are the default operating parameters set at the factory prior to shipment ITEM DEFAULT RANGE Unit Network Address varies 000 100 rotary switches Unit Operating Mode OFF OFF MANUAL AUTO Unit Operating Mode MRT Pro Auto OFF MANUAL AUTO Time Clock Schedule None 4 Daily 12 Holiday 2 Override schedules Damper Operating Mode Manual MANUAL BUILDING PRESS MIXED AIR TEMP Fuel Selection Natural Gas NATURAL PROPANE Heating Unoccupied Setpoint 55 F 40 F 130 F Cooling Unoccupied Setpoint 100 F 40 F 130 F Remote Temperature Setpoint OFF 55 F 90 F Heating Occupied Setpoint 65 F 40 F 130 F Cooling Occupied Setpoint 73
54. edule can be programmed for up to 4 separate On Off events with any combination of days The daily schedule sets the typical On Off times for the unit The holiday schedule can be programmed for up to 12 separate On Off events with any combination of days The holiday schedule sets the Off times for holidays and other shutdown periods The override schedule can be programmed for up to 2 separate On Off events with any combination of days The override schedule sets the On times that will override the holiday schedule This scheduling system allows the user to program a diverse array of On Off operations An example of a typical schedule would be to have the unit On Monday through Friday from 6 00 AM to 5 00 PM except during the weeks of Thanksgiving and Christmas when the units will be Off However they will run each weekday during the Thanksgiving shutdown from 8 00 AM until noon while a maintenance crew is in the building TracRite has no preset operational schedule To set the operational times of the unit scroll through the SCHEDULES menu tree and locate the desired Daily Holiday or Override branch Enter the days and times for the unit to operate In the Daily or Override section these times should correspond to the desired times for the unit s operation In the Holiday section these times should correspond to the desired off times for the unit s operation For any schedule to function the Use tab must be set to yes To set the ti
55. ee the Typical Wiring Schematic Multiplexed Input and Clogged Filter sections of this manual for more information SOLUTION If clogged filter switch is closing 1 Are the filters dirty a Yes Install clean filters and continue b No Continue 2 Are the airflow switch sensing tubes obstructed a Yes Clear and continue b No Continue 3 Is the airflow switch setpoint properly adjusted a No Adjust setpoint b Yes Continue 4 Are the wires connected to the air pressure switch s normally open contact a No Rewire switch and continue b Yes Continue 5 Is the air pressure switch s normally open contact open a No Disconnect the sensing tubes and recheck Replace the switch if contacts do not open b Yes Continue 6 Find the clogged filter switch on the electrical schematic and identify the control panel terminals to which it is connected Disconnect the wire from these terminals Does this clear the alarm a Yes There is short in the wiring between the terminal strip and the switch Determine cause and rectify b No Continue 7 Unplug the connector from the controller that is connected to the multiplexed input Does this clear the alarm 36 a Yes There is short in the wiring of multiplexed resistors Determine cause and rectify b No There is an internal short in the controller Replace the controller FAULT CODE Insufficient OA PROBLEM The controller has turned off the burner ena
56. equivalent temperature rise and automatically limits the burners firing rate This insures the products of combustion delivered to the space by the unit are held at or below allowable OSHA thresholds The outside air percentage is the driving parameter for this function A greater percentage of outside air or dilution air enables the unit to generate a higher allowable equivalent temperature rise The maximum allowable equivalent temperature rise for 20 outside air 15 48 9 F The maximum allowable equivalent temperature rise increases 1 22 F for each 1 increase in outside air TracRite units that recirculate air before the burner and do not employ an airflow measuring station utilize a control scheme that measures damper position to determine the percentage of return air These units are not listed by an independent third party testing agency but do use the equivalent temperature rise control scheme to limit burner modulation The maximum allowable equivalent temperature rise for 2096 outside air 1s 48 9 F The maximum allowable equivalent temperature rise increases 1 22 F for each 196 increase in outside air TracRite units that recirculate air after the burner are physically constrained to limit the percentage of return air These constraints are meant to provide the proper dilution air These units are not listed by an independent third party testing agency and do not use the equivalent temperature rise control scheme to limit burner modulation
57. ered on the keypad display will be PID Select Direct as input increases output increases High Input Val 85 F Low Input Val 50 F User Ctrl SP 75 F Max User SP 80 F Min User SP 70 F The temperature transducer senses the supply air temperature and sends a corresponding signal to the TracRite controller The controller compares this signal to the desired user control setpoint 75 F and uses the PID loop to modulate the output from 0 100 0 23 10Vdc The output is connected to chilled water valve that opens or closes to maintain the specified supply air temperature If the supply air temperature is 75 F the output from the controller will be determined by the PID control sequence and the override will have no effect on the output If the supply air temperature is more than 75 F the output from the controller will be determined by the PID control sequence or the override whichever is less If the supply air temperature is less than 75 F the output from the controller will be determined by the PID control sequence or the override whichever is more Max User SP 80 F 100 override Scaler 75 0 75 PID 0 100 75 F 100 User Ctrl SP 0 100 Output override Scaler Input lt 75 F Min User SP 70 F 0 REVERSE ACTING The controller output AO 1 is modulated by a PID loop from 0 to 100 based on the User Control setpoint and the input signal to IN 9 As the input signal increases
58. ine cause and rectify b Yes Replace controller FAULT CODE Burner Status PROBLEM The controller has activated the burner enable output but the burner status input is not receiving a signal that the burner is on SOLUTION Inspect burner control circuit and burner 1 Is there a prior alarm such as Unit On Fan Off Airflow Sw or Safety Circuit a Yes See the Diagnostic section for the previous alarm b No Continue 2 Isthe burner enable relay energized a No There is an open in the 24V AC circuit Determine cause and rectify b Yes Continue 3 Is the burner enable relay s normally open contact closed a No Replace relay b Yes Continue 4 Isthere a pilot flame present 31 No Refer to Installation Operation and Maintenance Manual for guidance in troubleshooting the flame relay or ignition module b Yes Continue 5 Isthe flame relay or ignition module main valve terminal energized a No Refer to the Installation Operation and Maintenance Manual for guidance in troubleshooting the flame relay or ignition module b Yes Continue 6 Isthe gas valve burner status relay energized a No There is an open in the main valve control circuit Determine cause and rectify b Yes Continue 7 Isthe gas valve burner status relay s normally open contact closed a No Replace relay b Yes Continue 8 Is there continuity at the controller between the burner status terminals a No There i
59. ior alarm 106 31 FAULT CODE B rner en eed sena e eU 31 SOLUTION Inspect burner control circuit and 31 FACE CODE Bumer Hand users 32 SOLUTION Inspect burner control circuit This fault has the potential to be very serious problem Close the manual gas valves immediately if the fan is not running 32 FAULT CODE Flame FENG ee 33 SOLUTION Investigate eee eee tei e Ree 33 Diagnostics Non Critical Fault Codes FAULT CODE Unit Oll Fan Qn prt peti ert excu e e 23 SOLUTION Tf f n is running s eto RR eg e en 33 SOLUTION Tf fan is not running Jl e a e eb a ea edet 34 FAULT GODE Unit om Fan cina tet Me Ren SER en n 34 SOLUTION If fan motor is running eene enne 34 SOLUTION If fan motor is not running eese eec eret tede re iie 34 FAULT CODE Check Airflow SWIIGReS iier tibia eoi 35 SOLUTION If high airflow switch is opening Do not adjust the switch setpoints sess 35 SOLUTION If low airflow switch is opening Do not adjust the switch setpoints 35 FAULT CODE Clogged Filter 36 SOLUTION If clogged filter switch 15 closing sess 36 FAULT CODE InSufmcient OA
60. ir and return air to maintain a constant pressure within the space A pressure transducer compares the pressure outside the space to the pressure inside the space and transmits a corresponding signal to the TracRite controller The controller compares this signal to the desired building pressure setpoint and uses PID loop to modulate the outside air and return air dampers to maintain the specified building pressure MDT MRT and MRT Pro Controls The MDT MRT and MRT Pro control systems do not support building pressure control mode MRT Expert Control To place the damper operation in Building Pressure Mode scroll through the menu tree locate the Damper Mode branch and select Bldg Prs Ctrl Next scroll through the menu tree locate the Setpoints branch select Bldg Prs and enter the desired pressure The allowable range is 0 05 wc to 0 05 we If the unit served by this control is a direct fired heater that recirculates air before the burner and 15 operating in the heating mode the unit will automatically keep the minimum outside air at 2090 If the outside air drops below 20 the burner will cycle off See Minimum Ventilation 700 Outside Air The 100 Outside Air function automatically opens the outside air dampers and closes the return air dampers This function is activated whenever a contact is closed between the appropriate terminals on the unit s terminal strip located in the unit s main control panel See the Typical Wiring S
61. irculating Direct Fired Units Energy Savings Mode 2 will automatically disable the burner if the burner s minimum firing rate exceeds the allowable equivalent temperature rise This condition is unlikely to occur unless the burner s minimum firing rate is misadjusted and set too high or the inlet air opening is restricted Energy Savings Mode 3 Energy Savings Mode 3 will automatically disable the burner if the outside air temperature 15 above the Heating Economizer setpoint This function 15 similar to an inlet duct thermostat The burner will cycle back on if the supply air temperature drops 3 F below the Heating Economizer setpoint To change the desired heating economizer temperature scroll through the SETPOINTS menu tree locate the HEATING ECONOMIZER Setpoint and enter a new temperature The default for this setpoint 15 65 F The allowable temperature range is 40 F 130 F Ventilation Mode Ventilation Mode occurs when the fan is running but the unit is not providing heating or cooling On an MDT control system the heating mode is activated when the remote temperature setpoint knob is turned to start the unit See Energy Savings Modes for more information On all other systems the ventilation mode is dependant on the room or outside air VDT Expert temperature The heating ventilation cooling operation is demonstrated below The dotted line in the middle of the diagram represents the change between room temperature rise and room
62. itch is closed the resistance at the controller input changes This allows the controller to identify which switch has closed The controller is programmed to associate each different resistance with a specific function For example when the optional clogged filter switch is closed between the appropriate terminals on the unit s terminal strip located in the unit s main control panel this tells the controller that the filters are clogged and it notifies the user through the local user interface See the Typical Wiring Schematic section of this manual for more information Clock Set The Clock Set function is used to set the current time and date as well as enabling Daylight Saving Time To set the clock scroll through the menu tree locate the Clockset branch select Date and enter a new date and time Select DST to enable Daylight Saving Time Daylight Saving Time is the default For your convenience Daylight Saving Time has been preprogrammed for the next several years To reset the starting and ending DST dates scroll through the DST menu tree locate the desired year and enter a new date If your area does not subscribe to Daylight Saving Time set the AMOUNT value to 000 Diagnostics Critical Fault Codes This section should assist the user in troubleshooting critical fault codes messages that have been displayed on the local user interface These faults require the operator to correct the condition and reset the alarm before normal unit
63. k setpoint and enter a new temperature The allowable temperature range is 40 F 130 F Cooling Night Setback The Cooling Night Setback function automatically cycles the unit on if the room temperature rises above the Cooling Setback temperature setpoint and the unit is scheduled to be off If the unit is scheduled to be off and the Cooling Setback function turns the unit the unit will be cycled off once the room air temperature has fallen 2 below the Cooling Setback setpoint This function toggles digital output DOI The default for this setpoint is 100 F To change the Cooling Setback setpoint scroll through the SETPOINTS menu tree locate the Cooling Setback setpoint and enter a new temperature The allowable temperature range is 40 F 130 F Auxiliary Unit Enable The Auxiliay Unit Enable function overrides all other Auto Mode functions and automatically cycles the unit into operation This function is activated whenever a contact is closed between the appropriate terminals on the unit s terminal strip located in the unit s main control panel Heating and cooling functions use the Night Setback Setpoints See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information This function can be used with a twist timer toggle switch door switch exhaust fan interlock or any other dry contact to override the time clock schedule VDT Expert Controls The TracRite VDT Expert modulating
64. lter monitoring and multiple damper control and temperature control schemes All of these modes provide the maximum in unit operational flexibility The optional airflow station imparts unparalleled adaptability into the operation of each unit A daily self calibration enables TracRite to detect the exact ratio of outside and return air entering the unit Then TracRite daily fine tunes the unit s operation based on these new parameters Air volume can vary because of changes in static pressure conditions due to loading filters VAV boxes and building dynamics These varying conditions influence the ventilation air provided by the unit On certain models of recirculating direct fired heaters this impacts the allowable equivalent temperature rise of the unit that is allowed under the latest ANSI standard for direct fired heaters TracRite diagnostic capabilities insure swift response to abnormal unit conditions A fault is generated anytime the operational parameters and actual unit operation are at odds An indication of trouble is displayed at the BACview and system PC in text format In the Diagnostics section of this manual is a list of all faults and possible causes and solutions of the features of the TracRite system are designed to provide the user with real time information At any time the user can display all of the operational parameters make changes if necessary and observe the various temperature pressure and damper readings Th
65. me clock function for 24 hour continuous operation scroll through the menu tree and locate the SCHEDULES page Set the 24 Hr Operation to yes Enter the Daily section of the menu and set the Use tab to yes Finally select the days for 24 hour operation See the CLOCK SET section of this manual for setting the time date and Daylight Savings function The VDT EXPERT control does not support the night setback functions Auxiliary Unit Enable The Auxiliary Unit Enable function overrides the time clock function and automatically cycles the unit into operation This function 15 activated whenever a contact 15 closed between the appropriate terminals on the unit s terminal strip located in the unit s main control panel See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information This function can be used with a twist timer toggle switch door switch exhaust fan interlock or any other dry contact to override the time clock schedule Heating Ventilating Cooling Operating Modes The TracRite DDC controller automatically switches between the heating ventilating and cooling modes of operation The previous sections described the Heating and Cooling Setback operation This section concentrates primarily on the Occupied operating modes 13 Figures 1 and 2 provide pictorial representation of slight differences between occupied and unoccupied periods Heating Mode Depending on the control typ
66. mperature The allowable temperature range is 40 F 130 F The burner will modulate using a PID loop to maintain this temperature To change the desired heating discharge temperature of a VDT Expert control system scroll through the SETPOINTS menu tree using the BACview locate the OA for Htg Clg Changeover Setpoint and enter the desired temperature The allowable temperature range is 40 F 130 F Next scroll through the SETPOINTS menu tree using the BACview locate the Discharge Heating Setpoint and enter a new temperature The allowable temperature range is 40 F 130 F The burner will modulate using a PID loop to maintain this temperature Additionally on all controls systems except the MDT and VDT EXPERT the control system modulates the burner to maintain the supply air temperature within a defined operating window This window defines the maximum and minimum discharge temperatures To change the desired minimum supply or discharge air temperature scroll through the SETPOINTS menu tree locate the HTG MIN DA Setpoint and enter a new temperature This temperature must not be greater than the HTG MAX DA Setpoint The allowable temperature range is 40 F 130 F This sets the lowest discharge air temperature that will leave the unit To change the desired maximum supply or discharge air temperature scroll through the SETPOINTS menu tree locate the HTG MAX DA Setpoint and enter a new 14 temperature This temperature must not be less
67. mperature setpoint UNIT AUTO MODE The MRT control does not support the time clock night setback or auxiliary unit enable functions MRT Pro Controls The TracRite MRT Pro modulating room temperature control provides some limited information regarding unit operation on an LCD display and allows the user to adjust a few basic operational parameters The MRT Pro must be placed in the AUTO mode in the controller program using a BACview or PC in order for it to operate The Off Manual and Auto modes will then function as described in the following sections UNIT OFF MODE The OFF mode prevents the unit from starting and overrides the Time Clock Night Setback and Auxiliary unit enable functions BACview or PC 15 required to change from this mode See the section related to the MRT Expert for instructions on how to use the BACview for programming UNIT MANUAL MODE Manual Mode allows the unit to turn on regardless of the Time Clock Night Setback or Auxiliary unit enable functions A BACview or PC is required to change to this mode See the section related to the MRT Expert for instructions on how to use the BACview for programming UNIT AUTO MODE Auto Mode is the default unit operational mode Auto Mode has four different functions that control the unit operation They are a time clock heating and cooling night setbacks and a signal from an external source BACview or 15 required to change to this mode See the section related t
68. n automatically cycles the unit if the room temperature falls below the Heating Setback temperature setpoint and the unit is scheduled to be off If the unit is scheduled to be off and the Heating Setback function turns the unit the unit will be cycled off once the room air temperature has risen 2 above the Heating Setback setpoint The default for this setpoint is 55 F and is fixed at 10 below the Heating Occupied setpoint Changing the Heating Occupied setpoint changes the Heating Setback setpoint Refer to Appendix IV for more details on MRT Pro setpoints Cooling Night Setback The Cooling Night Setback function automatically cycles the unit if the room temperature rises above the Cooling Setback temperature setpoint and the unit is scheduled to be off If the unit is scheduled to be off and the Cooling Setback function turns the unit the unit will be cycled off once the room air temperature has fallen 2 below the Cooling Setback setpoint The default for this setpoint is 100 F and is fixed at 27 above the Cooling Occupied setpoint Changing the Cooling Occupied setpoint changes the Cooling Setback setpoint Refer to Appendix IV for more details on MRT Pro setpoints Auxiliary Unit Enable The Auxiliary Unit Enable function overrides all other Auto Mode functions and automatically cycles the unit into operation This function is activated whenever a contact is closed between
69. n the MANUAL mode and enable the fan and burner See Heating Ventilating Cooling Modes and Energy Saving Modes of this manual for more information UNIT AUTO MODE The MDT control does not support the time clock night setback or auxiliary unit enable functions Controls modulating room temperature is the most basic TracRite control for room temperature The MRT control system includes a remote control panel equipped with 1 or 2 potentiometers 3 or more pilot lights and up to 2 switches UNIT OFF MODE Off Mode is the default unit operational mode To place the unit in Off Mode rotate the temperature setpoint knob on the remote control panel counterclockwise to the stop This will place the unit in the OFF mode and extinguish the on light The OFF mode prevents the unit from starting UNIT MANUAL MODE Manual Mode allows the unit to turn on To place the unit in Manual Mode rotate the temperature setpoint knob on the remote control panel clockwise to the desired room temperature setpoint This will place the unit in the MANUAL mode and enable the fan The burner will be enabled if the room air temperature is 2 below the room temperature setpoint and will be deactivated when the room air temperature is above the room temperature setpoint The cooling output will be enabled if the room air temperature is 2 above the room temperature setpoint and will be deactivated when the room air temperature is below the room te
70. ner s negative terminal 2 Yes Continue Is there 24VAC on the signal conditioner power terminals a No Determine cause and rectify b Yes Continue Is there twice the DC voltage on the signal conditioner s output terminals as there is on the signal conditioner s input terminals a No Replace the signal conditioner b Yes Continue Is the DC voltage on the modulating valve terminals the same as the DC voltage on the signal conditioner s output terminals a No There is a break in the wiring between the signal conditioner and the modulating valve terminals Determine cause and rectify b Yes The electronics are working to this point Continue 28 7 Is there sufficient temperature rise amount of outside air that is being delivered to the space a No Follow the instructions in this manual for placing the unit in Manual damper control mode Adjust the Man Vent setpoint to 20 outside air Is there sufficient temperature rise for the amount of outside air that is being delivered to the space 1 2 No Contact the factory Yes Continue b Yes Continue 8 Verify there is sufficient inlet gas pressure Verify the modulating valve is properly adjusted Verify the burner orifices are clear of obstruction Contact the factory SOLUTION If burner was not operating prior to shutdown check prior alarm log 1 Is there a prior alarm such as Safety Ckt Airflow Sw or Flame Failure a Yes See the
71. ng the unit off and then on will clear this fault at any time SOLUTION If fan motor is running 1 Isthe BACview remote indicating an alarm a Yes Check previous alarms and continue b No Continue 2 Isthe motor starter s normally open auxiliary contact closed a No Replace contact b Yes Continue 3 Are the high and low velocity airflow switch contacts closed a No Are the belts on and is the fan motor 1 Yes Contact factory Do not adjust the switches setpoints 2 No Determine cause and rectify b Yes Continue 4 Isthe fan status relay energized a No There is an open or break in the wiring Determine cause and rectify b Yes Continue 5 Isthe fan status relay s normally open auxiliary contact closed a No Replace relay b Yes Continue 6 Is there continuity at the controller between the fan status terminals a No There is an open in the wiring between these terminals Determine cause and rectify b Yes Replace controller SOLUTION If fan motor is not running 1 Isthe BACview remote indicating an alarm a Yes Check previous alarms and continue 34 b No Continue 2 Is controller output LED for the unit enable output lit a No There is a problem with the controller Replace controller b Yes Continue 3 Isthe unit enable relay energized a No There is an open in the wiring between these terminals Determine cause and rectify b Yes Continue 4 Isthe unit enable relay s normally open
72. nt scroll through the menu tree locate the Setpoints branch select Freezestat SP and enter a new temperature The allowable temperature range is 35 F 80 F Clogged Filter An optional clogged filter switch is required for this function The Clogged Filter function automatically notifies the user of a dirty filter condition A Clogged Filter indication will appear on the local user interface On the MRT Pro intelligent room sensor a bell will be displayed to notify the user of a dirty filter condition This function is activated whenever a contact is closed between the appropriate terminals on the unit s terminal strip located in the unit s main control panel See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information User Configured PID Control This function is applicable to non recirculating units only The User Configured PID Control function allows the user to control an analog output based on a user defined analog input and setpoint See the Typical Wiring and Unit Controller Specification sections of this manual for more information regarding the inputs and outputs This function also allows the user to select the PID type direct or reverse acting and establish upper and lower control limits Five keypad entries define the operational parameters These parameters are User Control Setpoint Minimum User Setpoint Maximum User Setpoint Low Input Value and High Input Value The low and high inpu
73. nual gas valves There is a short in the wiring between the burner status relay and the burner status terminals Determine cause and rectify b Yes Close manual gas valves Replace the controller FAULT CODE Flame Failure This fault code is not applicable to all unit types PROBLEM The controller has received a signal from the flame relay indicating a flame failure SOLUTION Investigate flame relay 1 Is there a prior alarm such as Unit On Fan Off Airflow Sw or Safety Circuit a Yes See the Diagnostic section for the previous alarm b No Continue 2 See flame relay troubleshooting information in unit Installation Operation and Maintenance Manual Diagnostics Non Critical Fault Codes This section should assist the user in troubleshooting non critical fault code messages that have been displayed on the local user interface Most of these faults are automatically reset once the fault is corrected or condition changes FAULT CODE Unit off Fan on PROBLEM The controller has not activated the unit enable output to start the fan but the fan status input is receiving a signal that the fan is running This fault will automatically clear about 15 seconds after the fault is corrected SOLUTION If fan is running 2 Is controller unit enable output LED for lit a Yes There is a problem with the controller program Call factory b No Continue 3 Is controller output contact for the unit enable output closed a Yes Turn
74. o the MRT Expert for instructions on how to use the BACview for programming Unoccupied Occupied Control Once the unit is placed in the Auto Mode the unit can be controlled from the keypad on the MRT Pro room sensor The MRT Pro room sensor display will indicate the unit is in the un occupied period To turn the unit on and place it in the occupied period press the 9 Manual On button on face of the MRT Pro room sensor Pressing the Warmer button can increase the amount of time Pressing the Cooler button can decrease the amount of time Each press of the Cooler button decreases the time in 30 minute increments Each press of the Warmer button increases the time in 30 minute increments to a maximum of 9 hours of time To turn the unit off and place it in the un occupied period press and hold Manual On button on the face of the MRT Pro room sensor Alternately decreasing the on time until the time reaches zero turns the unit off Auto Mode has four different functions that control the unit operation They are a time clock heating and cooling night setbacks and a signal from an external source Scheduling Time Clock This function requires the purchase of a BACview or a direct PC interface to the unit controller See the section related to the MRT Expert for instructions on how to use the BACview for programming Heating Night Setback The Heating Night Setback functio
75. off the power to the controller and recheck If contact 15 still closed the controller output is shorted Replace the controller b No Continue 4 Is the unit enable relay energized a Yes There is a short or jumper in the wiring Determine cause and rectify b No Continue 5 15 motor starter energized a Yes There is a short or jumper in the wiring Determine cause and rectify b No Continue 6 Isthe fan status relay energized a Yes There is a short or jumper in the wiring Determine cause and rectify 33 b No Continue 7 15 fan status relay s normally open contact closed a Yes Replace relay b No Continue 8 Isthere continuity between at the controller between the fan status terminals a Yes There is a short in the wiring between these terminals Determine cause and rectify b No Replace controller SOLUTION If fan is not running 1 Is the fan status relay s normally open contact closed a Yes Replace relay b No Continue 2 Is there approximately SVDC at both controller terminals used for the fan status a Yes There is a short in the wiring between these terminals Determine cause and rectify b No Replace controller FAULT CODE Unit on Fan off PROBLEM The controller has activated the unit enable output to start the fan but the fan status input is not receiving a signal that the fan is running This fault will automatically clear about 60 seconds after the fault is corrected Turni
76. om an external source to an auxiliary digital input To place the unit in Auto Mode scroll through the Unit Modes menu tree locate the AUTO OFF MAN branch and select AUTO This will place the unit in the AUTO mode This activates the four Auto mode functions Scheduling Time Clock The primary Auto Mode function is the Time Clock Schedule The Time Clock function allows the user to schedule the operational times of the unit There are four different schedules available 24 hour continuous operation daily holiday and override The daily schedule can be programmed for up to 4 separate On Off events with any combination of days The daily schedule sets the typical On Off times for the unit The holiday schedule can be programmed for up to 12 separate On Off events with any combination of days The holiday schedule sets the Off times for holidays and other shutdown periods The override schedule can be programmed for up to 2 separate On Off events with any combination of days The override schedule sets the On times that will override the holiday schedule This scheduling system allows the user to program a diverse array of On Off operations An example of a typical schedule would be to have the unit On Monday through Friday from 6 00 AM to 5 00 PM except during the weeks of Thanksgiving and Christmas when the units will be Off However they will run each weekday during the Thanksgiving shutdown from 8 00 AM until noon while a maintenance crew is in the
77. own below Links to other menu headings are also available by pressing one of the 4 keys located directly below the screen Function key Default Password 0000 UNIT MODES 2 e Auto Off Man o Auto o Off o Manual Damper Mode MATempCtrl o BldgPressCtrl o ManualCtrl Home e Setpoints e Status Alarm SETPOINTS HOTKEY 3 Occupied SF range 40 130 Htg Setback SF range 40 130 40 Htg DA SF range 40 130 Clg Occupied F range 40 130 Clg Setback F range 40 130 e ClgMinDA range 40 130 Clg Max DA F range 40 130 Man Vent range 0 100 Mixed Air F range 30 90 Bldg Prs range 0 05 0 05 e Min Vent range 0 100 Economizer Temp 40 130 e Clg Economizer Temp F range 40 130 e Freeze Stat SF range 35 80 OA Temp for Htg Clg Changeover F range 40 130 VDT only Htg DA Temp F range 40 130 VDT only CIg DA Temp SF range 40 130 VDT only e Home e Status e Alarm e Resets STATUS MENU 4 The Status Menu always displays the current status of the fan burner and cooling e Room Temp F or Inlet Temp F DA Temp F e MA Temp F e Outside Air Bldg Pres wc Energy Save Mode Fan Cycles e Fan Hours Bnr Cycles Bnr Hours Clg Cycles Clg Hours Damper VDC e Burner VDC Burner Gas VDC Burner Air VDC e Safety Open Closed ActEQ Temp F e MaxEQ Temp F e Home e
78. quence Room Sensor Heating Sequence Cooling Sequence Schedule Sequence Calibrate Sequence User Configured Output Previous Home Alarm User Config USER CONFIGURABLE OUTPUT User Control Setpoint User Input Variable User Output PID Select Direct Acting Reverse Acting High Input Value Low Input Value Maximum User Setpoint e Minimum User Setpoint 43 Previous Home Setpoints Help 44 Appendix 10 Thermistor Output Curve Typical 10 000 Ohm Thermistor Output Curve v E X 5 o 12 22 4 14 32 41 50 59 68 77 86 95 104 113 122 131 140 149 Temperature in Degrees Typical 10 000 Ohm Thermistor Output Curve 30000 A 25000 20000 9 c 15000 5 10000 5000 0 32 41 50 59 68 77 86 95 104 Temperature in Degrees F 45 Appendix Airflow Station Layout AIRFLOW STATION LAYOUT NOTE RUN TUBE CONNECTIONS HEATER TO TRANSDUCER PT 15 IN CASING UNIT CONTROL ENCLOSURE LOW PRESSURE HIGH PRESSURE RA DAMPER TUBE CONNECTION TUBE CONNECTION TOTAL PRESSURE SENSING TUBE STATIC PRESSURE SENSING TUBE AIR FLOW BULLET AMPLIFIER WING AIRFLOW STATION SHEET METAL STRIP L EXTERIOR INSULATION FIELD PROVIDED WHEN MOUNTED OUTDOORS 46 Appendix lll POWER REQUIREMENTS 24V AC 10 20VA NETWORK COMMUNICATION BACnet ARCNET and MS TP Modbus RTU or N2 bus at up to 76 8K baud or 156K baud over
79. re twice the DC voltage on the signal conditioner s output terminals as there is on the signal conditioner s input terminals a No Replace the signal conditioner b Yes Continue 7 Is the DC voltage on the modulating valve terminals the same as the DC voltage on the signal conditioner s output terminals a No There is a break in the wiring between the signal conditioner and the modulating valve terminals Determine cause and rectify b Yes The electronics are working to this point Continue 8 Is there sufficient temperature rise for the amount of outside air that is being delivered to the space a No Follow the instructions in this manual for placing the unit in Manual damper control mode Adjust the Man Vent setpoint to 20 outside air Is there sufficient temperature rise for the amount of outside air that is being delivered to the space 1 No Contact the factory 2 Yes Continue b Yes Continue 9 Verify there is sufficient inlet gas pressure Verify the modulating valve is properly adjusted Verify the burner orifices are clear of obstruction Contact the factory FAULT CODE Safety Circuit Open PROBLEM The controller has detected a failure in the safety circuit SOLUTION If fan is not running check prior alarm log 1 Is there a prior alarm such as Unit On Fan Off or Airflow Sw a Yes See the Diagnostic section for the previous alarm b No Continue 2 Set Unit Mode to Manual Did fan start 30
80. s an open in the wiring between these terminals Determine cause and rectify b Yes Replace controller FAULT CODE Burner Hand PROBLEM The controller has not activated the burner enable output but the burner status input is receiving a signal that the burner is on SOLUTION Inspect burner control circuit This fault has the potential to be a very serious problem Close the manual gas valves immediately if the fan is not running 1 Isthe controller s burner enable output LED lit a Yes Close manual gas valves There is a problem with the controller program Contact factory b No Continue 2 Are the main automatic gas shutoff valves energized a No The main automatic gas shutoff valves are leaking Turn off unit and close manual gas valves Determine cause of valve failure and rectify b Yes Continue 3 Is the flame relay energized a No There is a short in the wiring of the gas valves Close manual gas valves Determine cause of short and rectify b Yes Continue 4 Is the burner enable relay energized a Yes There is a short in the wiring of the flame relay Close manual gas valves Determine cause of short and rectify b No Continue 5 Is the burner enable relay s normally open contact closed a Yes Close manual gas valves Replace the relay b No Continue 32 6 Unplug input terminals from input jack Is there continuity at the controller between the burner status terminals a No Close ma
81. splayed on the MRT Pro a like amount The individual Heating and Cooling setpoints cannot be changed without a BACview or PC If the target setpoint has been adjusted 3 F the MRT Pro will display the new SETPOINT as 72 F the new Heating setpoint as 68 F and the new Cooling setpoint as 76 F However the default setpoints of 65 F and 73 F would be displayed on a BACview or PC 48 Typical Wiring Schematic RECIRCULATING CMA MODEL DIAGRAM Note Piping from unit into building for pressure transducer 13 by others High side port tube piped into building and low side port tube piped to atmosphere UC 61 Note Piping between unit and flow station for transducer 15 is by others Tube on air entering side of flow station is pipad to PT 15 high side port and tube Felt 4 3 air leaving side piped to low side port 4 Aia 01 75 02 JUMPER HERE FOR MAT 231 DAMPER CONTROL 56 S DAMPER CONTROLI Sonn sesa I HER OW 3 iz 65 04 BURNER CONTROL RS 03 TO Mag Aye Dem E ASW 72 2 85 02
82. t values describe the input transducer range The control setpoint is the primary operational parameter while the minimum and maximum setpoints describe the extents of the desired operating range and provide secondary control as described below The allowable range for all of these parameters is 9999 99 9999 99 The analog input and output are polarity sensitive and can be configured for different types of inputs See the Typical Wiring and Unit Controller Specification sections of this manual for more information regarding the inputs and outputs The analog input must be connected to IN 1 This input must be configured for either of two different types of input signals 0 5 The output impedance must not exceed 10 The input impedance of the controller is IMQ This input is polarity sensitive Be sure the connections from the source are correctly polarized at the controller 22 Thermistor Precon type 2 10k ohm at 77 F Input voltages should range between 0 489V and 3 825V See the wiring diagrams for recirculating model units for typical connections of transducers The IN 1 configuration jumpers on the controller must be set for the appropriate input signal A contact closure between the appropriate terminals on the unit s terminal strip located in the unit s main control panel will drive the output to 100 See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information DIRECT ACTIN
83. temperature fall Select a point on the heavy line in the diagram to determine the mode of operation FIGURE 1 UNOCCUPIED EXAMPLE except VDT Expert Start at point A The unit is off because neither heat or cooling is required and the room temperature is rising Follow the dashed line upward If the room temperature rises to the cooling setpoint the fan and cooling will be enabled and the unit will be in the cooling mode Follow the solid line clockwise Once the room temperature has fallen to a temperature that is 2 F below the cooling setpoint the cooling and fan will be disabled Follow the dashed line downward If the room 16 temperature falls to heating setpoint fan and heating will be enabled and the unit will be in the heating mode Continue following the solid line in a clockwise direction to the heating setpoint Once the room temperature rises to a temperature that is 2 F above the heating setpoint the heating and fan will be disabled Cooling mode cooling SP cooling enable Cooling mode 2 F of cooling SP cooling disable 2 F of heating SP heating disable T E E E M M P P E E R R A A U U R R E E heating SP heating enable D E Ete Heating mode Heating mode FIGURE 1 FIGURE 2 OCCUPIED EXAMPLE Start at point A The unit is in the ventilation mode and the room or outside air temperature is rising Follow the dashed line up
84. than the MIN Setpoint The allowable temperature range is 40 F 130 F This sets the highest discharge air temperature that will leave the unit If the maximum and minimum discharge temperature setpoints are set for the same temperature the supply air temperature will be the same as the setpoint regardless of the room temperature setpoint or actual room temperature Recirculating Direct Fired Heaters Using different controller software the TracRite DDC system can accommodate three distinct types of recirculating direct fired units those that return air before the burner and employ a special airflow station those that return air before the burner and do not employ a special airflow station and those that recirculate air after the burner Recirculating direct fired units like all direct fired units deliver all of their products of combustion directly to the heated air space For this reason it is extremely important that the proper ventilation rate be maintained to dilute these emissions TracRite units that recirculate air before the burner and employ an airflow measuring station utilize a control scheme that measures air pressure to determine the ratio of outside air and return air These units are listed by an independent third party testing agency and use the equivalent temperature rise control scheme to limit burner modulation The TracRite system accurately measures the ratio of outside and return air calculates the allowable
85. ut plug Determine cause and rectify b No Continue 4 Reset the alarm Check and note the DC voltage at controller s analog output for the heating signal Set the Heating Setpoint for 9130 F Set the HTG MAX DA and HTG MIN DA Setpoints for 130 F Did the Burner VDC displayed on BACview remote increase a No Unless the outside air temperature is extremely warm the Burner VDC should have increased to 7 5VDC or more Close the manual 29 main gas valve closest to burner and measure discharge air temperature Is it less than 130 F 1 Yes There is a problem with the controller program or controller itself Contact the factory 2 No The outside air temperature is too hot to determine the actual cause of the problem Reset the alarm and recheck when the outside air temperature is much cooler b Yes This signal is fed to the signal conditioner Disconnect the wires from the signal conditioner s input signal terminals and measure the voltage on the wires Is it the same as the voltage coming from the controller 1 No There is an open in the wiring from the controller output Correct wiring and reconnect the wires to the terminals on the signal conditioner Be sure the wire from the controller s ground terminal is connected to the signal conditioner s ground terminal 2 Yes Continue 5 Is there 24VAC on the signal conditioner power terminals a No Determine cause and rectify b Yes Continue 6 Is the
86. ward If the room or outside air temperature rises to a temperature that 15 2 F over the cooling setpoint the cooling will be enabled and the unit will be in the cooling mode Follow the solid line clockwise Once the room or outside air temperature has fallen to the cooling setpoint the cooling mode will be disabled and the unit will be in the ventilation mode Follow the dashed line downward If the room or outside air temperature falls to a temperature that is 2 F below the heating setpoint the heating will be enabled and the unit will be in the heating mode Continue following the solid line in a clockwise direction to the heating setpoint Once the room or outside air temperature rises to the heating 17 P E R A d U R E D setpoint the heating mode will be disabled and the unit will be in the ventilation mode Cooling mode Cooling mode Ventilation 7 8 o Ventilation mode 2 F of heating SP heating enable Heating d E Heating mode FIGURE 2 Cooling Mode Depending on the control type the Occupied Cooling Mode allows the cooling to operate as needed and is activated whenever the room or outside air temperature is 2 above the cooling setpoint During the Unoccupied Cooling Mode the cooling is activated whenever the room or outside air temperature is at the cooling setpoint and is deactivated 2 F below the cooling setpoint In the Cooling Mode the cooling output will

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