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Carrier 48TF004-007 Air Conditioner User Manual

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2. BACview BACnet MENU POINT NAME OBJECT RANGE DEFAULT ENTRY HOME Select function below CONFIG CONFIGURATION UNIT UNIT CONFIGURATION Fan Mode fan_mode 1 Auto Continuous 2 Continuous 3 Always On Unit Start Delay start_delay 0 30 sec 5 Fan Off Delay fan_delay_off 0 180 sec 90 Minimum Cooling SAT sat cl min 45 75 F 50 Maximum Heating SAT sat_ht_max 95 150 F 120 Vent Dmpr Pos DCV Min Pos econ_min 0 100 Open 20 DCV Max Vent Damper Pos iaq_dpr_max 10 60 Open 50 S Fan Service Alarm Timer sfan_service_hrs 0 9999 hr 0 Comp 1 Service Alarm Timer comp1_ser 0 9999 hr 0 vice_hrs Comp 2 Service Alarm Timer comp2_ser 0 9999 hr 0 vice_hrs Filter Service Alarm Timer filter_service_hrs 0 9999 hr 600 Pushbutton Override pb_enable Disable Enable Enable Setpoint Adjustment stpt_adj_enable Disable Enable Enable Setpoint Adjustment Range stpt_adj_range 0 5 F 5 Cooling Lockout Temperature oat_cl_lockout 0 80 F 45 Economizer High OAT Lockout Temp oat ec lockout 55 80 F 75 HP Rev Cycle Lockout Temp hp_rev_cycle_lock 20 30 F 3 out Heating Lockout Temperature oat_ht_lockout 35 150 F 65 Unocc Free Cool Enable ntfc_ena Disable Enable Disable Setpoint Separation min_stpt_sep 2 10 F 5 Occupancy Source occ_source 1 Always occupied Always Occupied 2 BACnet Sched ule 3 BAS On Off 4 Remote Occ In put CAL SENSOR CALIBRATION IBRATE Space Temp Calibration spt_offset 9 9 10 F 0 Supply Air Temp
3. 13 0 a Additional Installation Inspection 13 al Software Version 21 DEVICE West ss au neh uqa s pan PUR LEE SN UNT 13 uu Fan Tes 2 S l ee S 13 Communication LED s 22 Compressor 1 and Compressor 2 Test 13 D UPC METTI 24 Heat 1 and Heat 2 Test LLL 13 Third Party Networking 26 Reversing Valve Test 13 APPENDIX A USER INTERFACE MENUS 27 Dehumidification Test 14 APPENDIX B THIRD PARTY POINTS LIST 36 Power Exhaust Test aasawa ce eee ee ss 14 RTU OPEN START UP SHEET 41 Copyright 2010 Carrier Corp e 7310 W Morris St e Indianapolis IN 46231 Printed in U S A Edition Date 08 10 Catalog No 48 50HCTQ 01T Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces NEW SAFETY CONSIDERATIONS Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components Only trained and qualified service personnel should install repair or service air conditioning equipment Untrained personnel can perform the basic maintenance functions of replacing fil
4. Compressor Safety 8 Economizer I ae S ssp s es 18 Humidistat 8 Power EXHAUST si Rb bas kek Es 18 Single Enthalpy Outdoor Enthalpy 8 Heating sse tee eo eie eo ee e e ros 18 Differential Enthalpy 8 Indoor Air Quality 19 Fire Shutdown 9 Dehumidification a Y 19 Filter StatdSy uy t s t uruqa E a ka h a 9 Demand Limit es zs sss nte RE eA 19 Fan Status Cu ADE RSS te pd teas 9 Unoccupied Free Cooling 19 Remote Occupancy 9 Optimal Start 20 Communication Wiring Protocols 10 Fire Shutdown 20 General Jay naya hapu iu eei epe EM odes 10 Compressor Safety 20 I VuOPEN rete e 10 Ban Status L b ooh ohh Te Sb E ev pes 20 BACnet MS TP eene ree 10 Filter Status 20 Modbus Z RUE u Door Switch 20 Johnson N2 i ec noes SEH HUE EE RS 11 I buco cc 20 LEo0nWOEIKS 2 ape Re REC ERO EVEN UD OR EE 11 TROUBLESHOOTING 7 Local ACcess cee eee 12 Ae E SS START UP
5. 48 50TC04 28 50TCQOA4 12 48 50HC04 14 50HCQ04 12 p Carrier Factory Installed Option RTU OPEN turn to the experts fH Controls Start Up Operation and Troubleshooting Instructions TABLE OF CONTENTS Economizer Test 14 SAFETY CONSIDERATIONS 2 eee eee eee 2 Analog Output 2 Test 14 GENERAL 2 Configuration eeu ces besa ERE REESE EP 14 SENSOR ACCESSORY INSTALLATION 2 Setpomt es eR eR RENE 14 i URI trai PEE 14 Sensors and Accessories 4 Inputs he en ESE 15 User Interfaces cc ua 4 SeIVIC oie ERR E REP Eq ERR EE 16 Install 2 NIS MM ode tones be Hilde 4 Cloekset ccc oe eck dence acd neh gained 16 S idum e 1 USERPW 17 Outdoor Sir SENSO OAT a 86 j OPERATION 17 C pakasqa x Occupancy sese SAREE SAE Re e EET 17 CO Sensor s IAQ and OAQ 6 e Indoor Supply Fan 2 0 2 ee eee eee 17 Relative Humidity Sensors 8 i j Installing Discrete Inputs 8 90 Mss BN NES
6. Linkage communication failed 23 Alarms Alarms are provided to indicate a possible problem with the controller or unit Alarms can be checked through a network and or the local access device All alarms are listed in Table 4 with name object name action taken by control reset method and possible cause Some alarms can occur based on specific configurations Safety Chain Alarm This alarm occurs immediately if the supply fan internal overload trips or if an electric heat limit switch trips The Unit Status will be Shutdown and the System Mode will be Disable All unit operations stop immediately and will not restart until the alarm automatically clears There are no configurations for this alarm it is all based on internal wiring This alarm will not occur if Fire Shutdown Alarm is active Normal operation resumes when the safety chain circuit is complete Fire Shutdown Alarm This alarm occurs immediately when the smoke detector senses smoke The Unit Status will be Shutdown and the System Mode will be Disable All unit operations stop immediately and will not restart until the alarm automatically clears If there is not a smoke detector installed or the smoke detector did not trip check input configurations NOTE The default function for input 5 is a normally open Fire Shutdown input Supply Fan Failure This alarm occurs when the indoor fan is being command on and the fan status switch feedback is showing the fan o
7. 0 hours if set O hr this point is disabled and its alarm will never be generated Comp 1 Service Alarm Timer The timer set for the Compressor 1 Runtime Alarm After the number of hours set on this point is exceeded the corresponding alarm will be generated and must be manually cleared in the maintenance menu after the maintenance has been completed The timer will then begin counting its runtime again for the next due maintenance NOTE Default 0 hours if set O hr this point is disabled and its alarm will never be generated Comp 2 Service Alarm Timer The timer set for the Compressor 2 Runtime Alarm After the number of hours set on this point is exceeded the corresponding alarm will be generated and must be manually cleared in the maintenance menu after the maintenance has been completed The timer will then begin counting its runtime again for the next due maintenance NOTE Default 0 hours if set O hr this point is disabled and its alarm will never be generated Filter Service Alarm Timer The timer set for the Dirty Filter Alarm After the number of hours set on this point is exceeded the corresponding alarm will be generated and must be manually cleared in the maintenance menu after the maintenance has been completed The timer will then begin counting its runtime again for the next due maintenance NOTE Default 600 hours if set 0 hr this point is disabled and its alarm will never be generated
8. N O 1 No FIOP 2 FIOP N O Humidistat N O T55 CONFIGURATION POINTS CON T Compressor Stages Economizer Exists Reversing Valve Type Heat Type Number of Heat Stages Continuous Occupied Exhaust Indoor CO2 Sensor Value Min mA Indoor CO2 Sensor Value Max mA Outdoor CO2 Sensor Value Min mA Outdoor CO2 Sensor Value Max mA comp stages econ exist rev vlv type heat type heat stages occ exh iaq ref lo ppm iaq ref hi ppm oaq ref lo ppm oaq ref hi ppm 3 HP Y1 W1 Ctrl One stage Two Stage No Yes O output type B output type Electric Gas 1 2 0 no heat No Yes 0 9999ppm 0 9999ppm 0 9999ppm 0 9999ppm HP Y1 W1 Ctrl TCQ and HCQ models One Stage sizes 04 07 and A08 A12 Two Stages sizes 08 30 No No FIOP Yes FIOP O output type Gas 48 Series Units Electric 50 Series Units 0 50 series cooling only units 1 All TCQs and HCQs Low Nox units single phase gas units TC04 09 low and TC05 07 med heat 3 phase gas units 2 TC04 and 08 09 med TC05 09 high heat 3 phase gas units HC04 09 3 phase gas units and All 12 30 gas units No 0 2000 0 2000 BACview BACnet MENU POINT NAME OBJECT RANGE DEFAULT ENTRY HOME Select function below CONFIG CONFIGURATION SERVICE SERVICE CONFIGURATION Unit Type unit_type 1 Heat Cool Heat Cool TC and HC 2 HP O B Ctrl models Copyright 2010 Carrier
9. are available If it is unoccupied and the SPT gt unoccupied cool setpoint plus the T56 slider offset The indoor fan will be turned on by the staging algorithm If economizer is available and active and economizer open gt 85 and SAT gt SAT low limit 5 F and SPT gt effective set point 0 5 F OR Economizer is available but not active OR Economizer is not available OAT gt DX Lockout temperature If all of the above conditions are met the controller uses a PID logic loop to energize or de energize compressors to satisfy the cooling demand There is a fixed 3 minute minimum on time and a 5 minute off time for each compressor output and a 3 minute minimum time delay between staging up or down Any time the compressors are running the RTU OPEN will stage down the compressors if the SAT becomes less than the cooling low supply air setpoint After a compressor is staged off it may be started again after a normal time guard period and the supply air temperature has increased above the low supply air setpoint Economizer The Economizer dampers are used to provide free cooling and Indoor Air Quality if optional CO sensor is installed when the outside conditions are suitable The following conditions must be true for economizer operation ndoor Fan has been on for at least 30 seconds Enthalpy is Low if the Enthalpy input is enabled SAT reading is available OAT reading is availab
10. 2 Occupied 3 Unoccupied Schedule schedule Unoccupied Occupied Pushbutton Override pb_status Off Active Occupancy Contact occ_contact_status Off On Override Time Remaining ovrde_time xxx min RUNTIME Supply Fan Runtime sfan rntm XXXXX Compressor 1 Runtime comp rntm XXXXX Compressor 2 Runtime comp2 rntm XXXXX Filter Runtime filter rntm XXXXX 34 APPENDIX A USER INTERFACE MENUS CON T Alarm Menus FIELD ASSISTANT BACview MENU POINT NAME BACnet OBJECT RANGE MENU HOME Select function below Properties Equipment ALARM CURRENT ALARMS Alarms Safety Chain safety_alarm Normal Alarm Fire Shutdown fire alarm Normal Alarm Supply Fan Failure sfan fail alarm Normal Alarm Supply Fan in Hand sfan hand alarm Normal Alarm Compressor Safety comp alarm Normal Alarm Space Temp Sensor spt fail Normal Alarm Supply Air Temp Sensor sat alarm Normal Alarm Outdoor Air Temp Sensor Alarm oat alarm Normal Alarm Space Relative Humidity Sensor sprh alarm Normal Alarm IAQ Sensor iaq_alarm Normal Alarm OAQ Sensor oaq alarm Normal Alarm Space Temperature spt alrm status Normal Alarm Alarming Temperature spt alrm temp xxx F Alarm Limit Exceeded spt_alrm_Imt XXX F High Supply Air Temperature sat_hi_alarm Normal Alarm Low Supply Air Temperature sat_lo_alarm Normal Alarm Setpoint Slider slidepot_alarm Normal Alarm Switch Configuration di cfg alarm Normal Alarm Analog Input Configuration ai cfg alarm Normal Alarm High Space Relative Humidit
11. 4 SENSOR 5 SENSOR 6 X m e bg oc pq Le LEGEND jbo gee en RED lt a REDE e tete Factory Wiring PED BIR onan AEA BLK _ ____ I _ Field Wiring 13 D SENSOR 7 SENSOR8 SENSOR 9 SPACE TEMPERATURE AVERAGING 9 SENSOR APPLICATION C07133 Fig 5 Space Temperature Averaging 0 10V OSIG 4 2 NC o Co 6 M RELAY Om Om ALARM CONTACTS C07134 Fig 7 Indoor Outdoor Air Quality CO2 Sensor 33ZCSENC02 Typical Wiring Diagram C10820 Fig 6 Typical Rnet Communication Sensor Wiring Relative Humidity Sensors Space or Duct Mounted The accessory space humidity sensor or duct humidity sensor is used to measure the relative humidity of the air within the space or return air duct The RH reading is used to control the Humidi Mizer option of the rooftop unit For wiring distances up to 500 ft 152m use a 3 conductor 18 or 20 AWG shielded cable The shield must be removed from the sensor end of the cable and grounded at the unit end The current loop power for the sensor is provided by the RTU OPEN controller as 24vdc Refer to the instructions supplied with the RH sensor for electrical requirements and terminal locations RTU OPEN configurations must be changed after adding a RH sensor See below and Fig 8 and 9 for typical RH sensor wiring J4 1 or J4 4 24vdc loop power J4 2 or J4 5 4 20mA signal input NOTE The
12. Calibration sat_offset 9 9 10 F 0 Outdoor Air Temp Calibration oat_offset 9 9 10 F 0 42 CONFIGURATION POINTS CON T BACview BACnet MENU POINT NAME OBJECT RANGE DEFAULT ENTRY HOME Select function below CONFIG CONFIGURATION INPUT INPUT CONFIGURATION Input 1 Function ai1_function 1 No Sensor No Sensor 2 1 0 Sensor 3 0 0 Sensor 4 Space RH Sensor Input 2 Function ai2_function 1 No Sensor 1 No FIOP 2 1 0 Sensor 2 FIOP 3 0 0 Sensor 4 Space RH Sensor Input 3 Function di3 function 1 No Function Compressor Safety Input 3 Switch Configuration Input 5 Function Input 5 Switch Configuration Input 8 Function Input 8 Switch Configuration Input 9 Function Input 9 Switch Configuration Space sensor type T5x Override Duration di3 type di5 function di5 type di8 function di8 type di9 function di9 type spt type ovr dur 2 Compressor Safety 3 Fan Status 4 Filter Status 5 Remote Occu pancy 6 Door Contact N O N C 1 No Function 2 Fire Shutdown 3 Fan Status 4 Filter Status 5 Remote Occu pancy 6 Door Contact N O N C 1 No Function 2 Enthalpy Switch 3 Fan Status 4 Filter Status 5 Remote Occu pancy 6 Door Contact N O N C 1 No Function 2 Humidistat 3 Fan Status 4 Filter Status 5 Remote Occu pancy 6 Door Contact N O N C 1 T55 2 T56 use for T59 3 SPT Sensor 0 24 hours N O Fire Shutdown
13. Corp e 7310 W Morris St e Indianapolis IN 46231 Printed in U S A Edition Date 08 10 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 44 Catalog No 48 50HCTQ 01T Replaces NEW
14. HO NOILdO S L pee WWO2 mI las sil ms sur z i Ss ovo m N3S 13S 708 3ATLV138 390 rosso 10 08 sb 6p0VV0SyH G23vO8 TVNINW331 181 S LINN 001300 a Ape C10819 Fig 2 Typical Factory Option Wiring Resistive Non Communicating Sensor Wiring For sensor with setpoint adjustment up to 500 ft 152m use three conductor shielded cable 20 gauge wire to connect the sensor to the controller For non set point adjustment slidebar or return air duct sensor an unshielded 18 or 20 gauge two conductor twisted pair cable may be used Below is the list of the connections of the SPT to the RTU OPEN refer to Fig 3 and 4 for typical connections at the sensor J20 1 temperature sensor input SEN J20 2 sensor common e J20 3 Setpoint adjustment input SET NOTE See Fig 5 for space temperature sensor averaging T55 56 Override button will no longer function when sensors are averaged Only Sensor 1 T56 STO input can be used SENSOR WIRING JUMPER TERMINALS AS SHOWN C07131 Fig 3 Space Temperature Sensor Typical Wiring 33ZCT56SPT BRN COM SENSOR WIRING NOTE Must use a separate isolated transformer Fig 4 Space Tempera
15. OPEN Connect the wires to the removable Phoenix connectors and then reconnect the connectors to the board See Fig 1 and Table 1 for board connections and Fig 2 for Typical Factory RTU OPEN wiring IMPORTANT Refer to the specific sensor or accessory instructions for its proper installation and for rooftop unit installation refer to base unit installation instructions and the unit s wiring diagrams A WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury death and or equipment damage Disconnect electrical power and use lock out tags before wiring the RTU OPEN controller 3 Board Power 7 3 c 5 ps jos 1 se s N 0 o5 O05 ooooog ZU 9 o S ETI 2 AO 1 ES gt m 25929 05902224 2929025 zx DZS Ia 3a2 S50 6 e J3 Geisipiuung 6 3nduj g 1nduj ajqeinByuog I OV vC 2 pZ s indul ajqesnByuog I 1nduj ajqeunByuoy H 0 gt N B lt gt O ORTymxxxxP PCB 012311 Rev 3 amp 4 t 0 2 GND 0 10V only amp a Dehumidification DO 7 ZL Reversing Valve 2 T DO 8 Power Exhaust SW1 3 gt sw3 ORARIO 1 0444 Mili 2 Protocol Selector Ric iva SPT temp input BACnet Modbus or N2 oth for 0 SPT common i SPT offset input LON connection J15 C10818 Fig 1 RTU OPEN Control Module Table 1 RT
16. Pushbutton Override Set to enable or disable the pushbutton override function of the locally installed space Sensor Default Enable Setpoint Adjustment Set to enable or disable the setpoint adjustment function of the locally installed space sensor Default Enable Setpoint Adjustment Range Sets the slider range of a space sensor with built in function The slider is used to offset the control setpoint Range 0 5A F Default 5A F Cooling Lockout Temperature This defines the minimum outdoor air temperature that cooling mode can be enabled and run If the OAT falls below this number during cooling the compressors will be de energized Range 0 80 F Default 45 F Economizer High OAT Lockout Temp If the outdoor air temperature rises above this value economizer cooling will be disabled and dampers will return and stay at minimum position Range 55 80 F Default 75 F HP Rev Cycle Lockout Temp If the outdoor air temperature falls below this value the compressors will not be allowed to run for heating Unit Type must be set to Heat pump for this to be active Range 20 30 F Default 3 F Heating Lockout Temperature This defines the maximum outdoor air temperature that heating mode can be enabled and run If the OAT rises above this number during heating the heat stages will be de energized Range 35 150 F Default 65 F Unocc Free Cool Enable Set to enable or disable the economizer f
17. Start The earliest time prior to occupancy at which the Optimal Start function may begin to adjust the effective setpoints Setting this to 0 will disable optimal start Range 0 4 hours Default 4 hours Occ Relative Humidity Setpoint The space RH setpoint the controller maintains during the occupied period Range 0 to the Unocc RH setpoint Default 60 Unocc Relative Humidity Setpoint The space RH setpoint the controller will maintain during the unoccupied period Range 30 100 Default 90 DCV Max Ctrl Setpoint The difference between indoor and outdoor CO2 level which results in maximum ventilation damper position Range 0 9999ppm Default 650ppm Power Exhaust Setpoint When the economizer damper position opens above this point the power exhaust operation will begin When the damper position falls below this point and 5 lower the power exhaust will shutdown Range 20 9096 Default 50 NOTE This point is only used when Continuous Occupied Exhaust NO Unit Fan Mode Sets the operation of the indoor fan when not in cooling or heating mode Refer to fan operation for details on each operation Range Auto Continuous or Always On Default Continuous Unit Start Delay Refers to the time delay the unit will wait after power up or when transitioning from unoccupied to occupied before it pursues any specific operation Range 0 30 sec Default 5 sec Fan Off Delay Time delay in w
18. be clamped to the configured value Dehumidification The RTU OPEN will provide occupied and unoccupied dehumidification only on units that are equipped with the Humidi MiZer option from the factory This function requires a space relative humidity sensor or a humidistat for control The space relative humidity senor can be installed and configured as one of the two analog input channels inputs 1 or 2 on J4 or a humidistat can be installed and configured as switch input 9 on J5 When using a relative humidity sensor to control dehumidification occupied or unoccupied dehumidification setpoints are use accordingly When using a humidistat setpoints are not used and the dehumidification call comes when the humidistat indicates high humidity When the indoor relative humidity becomes greater then the dehumidification setpoint or switches from low to high a dehumidification demand will acknowledged Compressor state is monitored and time guards are honored If a compressor was just turned off prior to the dehum call the dehumidification output will be delayed the 5 minute minimum off time of the compressor When ok to dehumidify the dehumidification output J11 7 8 will be energized This will bring on the supply fan all compressors and the dehumidification relay placing the unit in Hot Gas Reheat dehumidification mode If dehumidification is called for during cooling or cooling is called for during dehumidification the unit will
19. factory default for dehumidification control is a normally open humidistat Installing Discrete Inputs Compressor Safety The compressor safety input provides the RTU OPEN with feedback to when the compressor is not running and should be This feedback is usually provided by a Compressor Lock Out CLO device Compressor safety is a dedicated input on the configurable input 3 and tells the RTU OPEN when the compressor is locked out The normal condition for compressor safety is good operation A normally open compressor safety is the factory default for all units Follow specific accessory instructions if installing a CLO device The CLO should wire into the unit s Low Voltage terminal Board LVTB NOTE Input 3 can also be wired into J 5 MOUNTING HOLES OOo WIRING lo Vin Gnd vo OPENING Vin J4 1 or J4 4 24Vdc lo J4 20r J4 5 4 20mA output C07201 Fig 8 Space Relative Humidity Sensor Typical Wiring Humidistat The accessory humidistat provides the RTU OPEN insight to the relative humidity in the space The humidistat reads the RH level in the space and compares it to its setpoint to operate a dry contact The humidistat is a dedicated input on the configurable input 9 and tells the RTU OPEN when the RH level is HIGH or LOW The normal condition for humidity is LOW A normally open humidistat is the facto
20. first step The OPEN controller can be used to troubleshoot the rooftop unit and or itself with service test communicating LED s and built in alarms Disconnecting the RTU OPEN from the network may also help troubleshooting the controller and rooftop unit Third Party Network troubleshooting may also be required For base unit troubleshooting refer to specific base unit Service Maintenance manual There is an on board battery that is used for RAM and clock back up It is a 3 volt lithium battery CR2032 The average life is 7 years with a minimum of 10 000 hours of back up When the RTU OPEN board is powered up the battery is not being used If power is lost the battery backs up the time clock Battery replacement should be done with the board powered up Thermistor Troubleshooting RTU OPEN uses thermistors to sense temperatures for control operation of the unit Resistances at various temperatures are listed in Table 2 Thermistor pin connections are shown in Table 1 Thermistors are used for supply air temperature SAT outdoor air temperature OAT and space temperature SPT and all must be a 10 kilo ohm type II sensor To check accuracy use a M high quality digital volt ohmmeter Connect the meter to the thermistor leads to obtain a resistance value Use Table 2 to convert that resistance to a temperature Next step is to measure temperature at probe location with an accurate thermocouple type temperature measuring instru
21. most Carrier rooftop equipment A Compressor Safety Alarm indicates that the equipment requires attention Cooling heating and supply fan outputs are not interrupted except where the RTU OPEN is configured for Heat Pump operation When configured for Heat Pump and in the heating mode a compressor safety fault will cause the available stages of electric heating to be enabled in place of mechanical heating Normal operation resumes when the compressor safety circuit is de energized Fan Status Fan Status may be configured on any unused binary input channel A typical application would be an airflow switch current sensing relay or other device that provides a supply fan running verification Enabling this function displays the supply fan s status on the equipment graphic If the controller loses fan status during operation heating and cooling are disabled the economizer damper if available is closed and an alarm for loss of status is indicated If the fan status is on when the controller is commanding the fan off the unit remains in the off state An alarm is generated indicating that the fan is running when it should be off Filter Status Filter status may be configured on any unused binary input channel A typical application is a differential pressure switch that senses the pressure drop across a filter bank When the pressure across the filter bank exceeds the setpoint of the differential pressure switch the Filter status
22. on occupancy The fan will run the whole occupied period and operate in the auto mode during the unoccupied period Always On When Fan Mode is set to Always On RTU OPEN will run the fan all the time regardless of occupancy or demand The RTU OPEN has an optional Supply Fan Status input to provide proof of airflow If this is enabled the point will look for a contact change whenever the Supply Fan Relay is on If it is not enabled then it will always be the same state as the Supply Fan Relay The cooling economizer heating dehumidification CO2 and power exhaust routines will use this input point for fan status 17 Cooling The compressor outputs are controlled by the Cooling Control PID Loop and Cooling Stages Capacity algorithm They will be used to calculate the desired number of stages needed to satisfy the space by comparing the Space Temperature SPT to the Occupied Cool Setpoint plus the T56 slider offset when occupied and the Unoccupied Cool Setpoint UCSP plus the T56 slider offset if unoccupied The economizer if available will be used for cooling in addition to the compressors The following conditions must be true in order for this algorithm to run Indoor Fan has been ON for at least 30 seconds Heat mode is not active and the time guard between modes equals zero If occupied and the SPT gt occupied cool setpoint plus the T56 slider offset Space Temperature and supply air temperature values
23. the heat pump s HP O B Ctrl type reversing valve function O output type refers to a valve that is energized for cooling and B output type refers to a valve that is energized for heating Default O output type Heat Type Tells the controller which type of heat the unit is capable of Electric is any unit without gas and a Gas unit is one which requires gas input for heating Factory Default Electric for cooling only units and heat pumps or Gas for gas units Number of Heat Stages Tells the controller how many heat stages outputs are available for use See configuration in Appendix A for details on specific unit configuration Factory Default 1 for single heat stage units 2 for duel stage units or 0 for cooling only units Continuous Occupied Exhaust This point tells the controller when to run the power exhaust if equipped on the unit If set to YES the power exhaust will be on all the time when in occupied mode and will be off when in unoccupied mode If set to NO the power exhaust will be controlled by the Power Exhaust Setpoint Default NO Indoor CO Sensor Value Min mA Sets the indoor CO value when the board reads 4 mA at input 1 or 2 Default 0 ppm Indoor CO Sensor Value Max mA Sets the indoor CO value when the board reads 20 mA at input 1 or 2 Default 2000 ppm Outdoor CO Sensor Value 0 Min mA Sets the outdoor CO2 value when the board reads 4 mA at input 1 or 2 Default 0 ppm Outdoor
24. wae OBJE Register Point Point SNVT Type SNVT Name Type Address MSV 8100 Input 1 Function RW ai1_function 1 MSV 8100 Input 2 Function 20 ai2_function 2 MSV 8100 Input 3 Function RW di3_function 3 Input 3 Switch Con RW MSV 8101 figuration di3_type 3 MSV 8100 Input 5 Function RW di5_function 5 Input 5 Switch Con R W MSV 8101 figuration di5_type 5 MSV 8100 Input 8 Function RW di8_function 8 Input 8 Switch Con R W MSV 8101 figuration di8 type 8 MSV 8100 Input 9 Function RW di9 function 9 Input 9 Switch Con RW MSV 8101 figuration di9 type 9 input 1 R ai 1 Al 1001 input_10 R ai_10 Al 1010 input_11 R ai_11 Al 1011 input_2 R ai_2 Al 1002 input_3 R di_3 BI 1003 input_4 R di_4 BI 1004 input_5 R di_5 BI 1005 input_7 R ai_7 Al 1007 input_8 R di_8 BI 1008 input_9 R di_9 BI 1009 Low Space Relative R discrete SNVT_switch nvoLoS Humidity sprh lo alarm BV 7019 in 10038 BI 38 95 PRHAIm Low Space Temp R discrete SNVT_switch nvo Alarm spt_lo_alarm BV 7012 in 10039 BI 39 95 LoSpaceTemp Low Supply Air Tem R discrete SNVT switch perature sat lo alarm BV 7021 in 10040 BI 40 95 nvoLoSATAIm Maximum Heating SAT sat_ht_max AV 83004 Min Setpoint Separa tion min_stpt_sep AV 63 Minimum Cooling SAT sat_cl_min AV 83003 R discrete SNVT_switch nvoOAQSens OAQ Sensor oaq_alarm BV 7006 in 10041 BI 41 95 or Occ Relative Humid R W occ de float SNVT lev per ity Setpoint hum stpt AV 3011 value 40083 ADF 36 cent
25. 111 and cannot be changed There is a 10 minute auto logout if a screen is left idle See Appendix A for navigation and screen content e BACview AHU Zone Temp 69 3 Heating Setpoint 70 5 67 0 Cooling Setpoint OK CANCEL DECR INCR een ccess Port e Oe tes e e e o o o 6 e 2 Cable Virtual BACview Virtual BACview is a freeware computer program that functions as the BACview Handheld The USB Link interface USB L is required to connect a computer to the RTU OPEN board The link cable connects a USB port to the J12 local access port This program functions and operates identical to the handheld Field Assistant Field Assistant is a computer program included with the purchase of the USB Link Tech Kit USB TKIT This is a field Tech Tool to set up service or download the RTU OPEN controller The link cable connects a USB port to the J12 local access port The menu structure is similar to the BACview but accessed and functions the same as I Vu LOCAL ACCESS PORT RNET MSB LSB 907 907 cr2032 EUM B4 Fea Eg Protocol Selector RTU MP 5 6 Local Access Cable C07170 Fig 15 BACview Handheld Connections 12 START UP IMPORTANT Follow the base unit s start up sequence documented in its specific instructions Use the base unit s start up check list when performing the start up At the end of this manual there is an additional RT
26. 81 nviOccRHSP R occ_con Occupancy Contact tact_status BV 1007 Occupancy Source R W occ_source MSV 1002 R discrete SNVT switch Occupancy Status OCC status BV 2008 in 10018 BI 18 95 nvoOccStatus un R signed SNVT_count_inc nvoOperating Operating Mode run_status MSV 2002 int 30001 ADI 13 9 Mode SN R W float VT time hour nviOptimal Optimal Start optm start AV 9026 value 40147 ADF 61 124 Start R float Outdoor Air CO2 oaq AV 1010 value 40085 ADF 37 SNVT_ppm 29 nvoOAQ Outdoor Air Temp R Sensor Alarm oat alarm BV 7003 Outdoor Air Temper R float SNVT_temp_p ature oa_temp AV 1003 value 40087 ADF 38 105 nvoOAT Outdoor CO2 Sensor R W oaq ref hi pp Value Max mA m AV 9014 Outdoor CO2 Sensor R W oaq_ref_lo_pp Value Min mA m AV 9013 38 APPENDIX B THIRD PARTY POINTS LIST CON T IN ALPHABETICAL ORDER BACnet Modbus N2 LON Works A i i Network Network Point Name wae ur cr i ahd Register Point Point SNVT Type SNVT Name Type Address Override Time Re R float SNVT_time_min nvoOvrTimeR maining ovrde_time AV 2016 value 40093 ADF 41 123 emain Password Protected Output Variable ppo AV 90000 Power Exhaust Relay R State pexh BV 2010 Power Exhaust Set RW float SNVT_lev_per point pexh stpt AV 3010 value 40097 ADF 43 cent 81 nviPwrExhSp Power Exhaust Test R W pexh_t
27. AC 1A J11 3 Dehumidification Relay State dehum DO Relay 24VAC 1A J11 7 8 These inputs if installed take the place of the default input on the specific channel Parallel pins J5 1 J2 6 J5 3 J1 10 J5 5 J1 2 are used for filed installation Refer to the input configuration and accessory sections for more detail Sensors and Accessories The RTU OPEN controller is configurable with the following field supplied sensors NOTE Supply air temperature sensor 33ZCSENSAT is factory installed Space temperature sensor SPS SPPL SPP SPPF 33ZCTSSSPT 33701565 1 or 1 Indoor air quality sensor 332CSENCO2 3370155002 33ZCT56CO2 required for demand control ventilation Outdoor air quality sensor 332CTSENCO2 e CO aspirator box C33ZCCASPCOZ2 required for CO return duct outside air applications Outdoor air enthalpy switch 33CSENTHSW Return air enthalpy sensor 33CSENTSEN required for differential enthalpy control Space relative humidity sensor 33ZCSENSRH 01 e Duct relative humidity 332CSENDRH 01 Humidistat HL 38MG 029 e Smoke Detectors CRSMKSEN002A00 CRSMKKIT002A00 Fan and or Filter Status CRSTATUS001A00 CRSTATUS005A00 User Interfaces BACview 6 Handheld BV6H Virtual BACview USB L or USB TKIT required Field Assistant USB TKIT required Install Analog Sensors Supply Air Sensor SAT The factory supplies the di
28. ACnet Write Priority 0 16 View Set User Use pw Password XXXX 0000 NETWORK Max Masters this_device 64 1 127 127 Network Max Info Frames this_device 63 1 999 10 APDU Timeout ms this_device 11 1 10000 3000 APDU Retries this device 73 1 10 3 MS TP Baud Rate this device 4161 1 9600 76800 76800 Set Current Time Date 24 hr clock ClockSet Time hh mm ss Date dd mmm yy DST Start Time Amount DST Entry Beg mm dd yy End mm dd yy BACnet Time Master No Broadcast TimeMstr Time Sync Mode Local Broadcast No Broadcast Time Sync Interval 1 9999 minutes Global Broadcast 5 28 APPENDIX A USER INTERFACE MENUS CON T Status Menus FIELD ASSISTANT BACview MENU POINT NAME BACnet OBJECT RANGE MENU HOME Select function below Properties Equipment STATUS STATUS Status System Mode mode_status 1 Disabled 2 Test 3 Run Operating Mode run_status 1 Off 2 Fan Only 3 Economizer 4 Cooling 5 Heating 6 Dehumidification 7 Test 8 Shutdown 9 Unocc Free Cooling NT FC Supply Fan Status sfan_status Off Running Space Temperature Prime Vari able space_temp xxx F Supply Air Temperature sa_temp xxx F Outdoor Air Temperature oa_temp xxx F Space Relative Humidity space_rh 0 100 Indoor Air CO2 iaq 0 5000 ppm Outdoor Air CO2 oaq 0 5000 ppm Economizer Output econ_output 0 100 open LINKAGE AIR LINKAGE Linkage Airside Linkage Status a_link_status Not Acti
29. CO2 Sensor Value Max mA Sets the outdoor CO value when the board reads 20 mA at input 1 or 2 Default 2000 ppm NOTE The indoor and outdoor min and max mA setting are used to set the linear curve of mA vs PPM Clockset This submenu screen allows you to set the date and time manually The Daylight Savings Time DST can also be changed here The date and time is automatically set whenever software is downloaded The clock is a 24 hour clock and not am pm The time should be verified and maybe changed according to unit location and time zone Factory Default 2 Eastern Standard Time 16 USERPW This submenu screen allows you to change the user password to a four number password of choice The User password change screen is only accessible with the Administrator Password 1111 The ADMIN password will always override the user password Factory Default 0000 Range 0000 9999 OPERATION The RTU OPEN will control the compressors economizer and heating outputs based on its space temperature input and setpoints It can also be controlled by a building control system or zoning system An optional CO2 IAQ sensor mounted in the space can influence the economizer minimum position The RTU OPEN has a hardware clock that can allow scheduling for stand alone operation The RTU OPEN s default is to control to occupied setpoints all the time until a type of occupancy control is set The following sections describe the operation for
30. CO2 sensor on the side of the economizer assembly in the return air section of the unit and is pre wired and pre configured at the factory For field installed sensors a field supplied transformer must be used to power the sensor Refer to the instructions supplied with the CO sensor for electrical requirements and terminal locations RTU OPEN configurations must be changed after adding a CO sensor See below and Fig 7 for typical CO sensor wiring J4 2 or J4 5 4 20mA signal input J4 3 or J4 6 signal common NOTE The factory used J4 2 amp 3 for CO IAQ sensor inputs Combination Temperature and CO2 Sensor If using a combination temperature and CO2 sensor 33ZCT55CO2 or 33ZCT56CO2 refer to the installation instructions provided with the sensor RED RED BLK BLK J20 1l RED j RED e RED BLK BLK BLK 2 lt SS SS SS e SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SPACE TEMPERATURE AVERAGING 4 SENSOR APPLICATION J20 Tle _ _ _ _ _ _ RED HERR T 99 RED EE RED _________ 1 BLK BLK 27 a oo ee I 1 irii ANT Dax rh i SENSOR 1 SENSOR 2 SENSOR 3 41 Q i pce Eg i 1 RED e o e xm RED P INN E RET BK 1 bg Loud Tox ere SENSOR
31. Input 5 This input is a discrete input and can be configured to be one of six different functions No Function Fire Shutdown Fan Status Filter Status Remote Occupancy or Door Contact This input can also be configured to be either a Normally Open N O or a Normally Closed N C switch Input 5 is factory wired to pin J1 10 Field accessories can be wired to its parallel pin J5 3 Software Default Fire Shutdown and N C Factory Default Fire Shutdown and N O Input 8 This input is a discrete input and can be configured to be one of six different functions No Function Enthalpy Switch Fan Status Filter Status Remote Occupancy or Door Contact This input can also be configured to be either a Normally Open N O or a Normally Closed N C switch Input 8 is factory wired to pin J2 6 Field accessories can be wired to its parallel pin J5 1 Software Default Enthalpy Switch and N O Factory Default No Function and N O without factory installed enthalpy sensor Input 9 This input is a discrete input and can be configured to be one of six different functions No Function Humidistat Fan Status Filter Status Remote Occupancy or Door Contact This input can also be configured to be either a Normally Open N O or a Normally Closed N C switch Input 9 is factory and field wired to pin J5 7 Factory Default Humidistat and N O Space Sensor Type This tells the controller what type of space sensor is installed to run t
32. On Off command to the BAS ON OFF software point An on command sets the occupancy to occupied and an off command sets it to unoccupied The Building Automation System can be speaking BACnet Modbus N2 or LON and is writing to the BAS On Off point in the open protocol point map Remote Occ Input When Occupancy Source is set to Remote Occ Input RTU OPEN follows occupancy based on the remote occupancy switch input Inputs 3 5 8 and 9 on plug J5 can be hard wired to command the unit s occupancy The Occupancy Contact point show the status as on or off on is occupied and off is unoccupied Indoor Supply Fan The indoor fan can be configured to operate in three different manors The configuration point Fan Mode determines how the fan will run The fan will always be disabled if a fire shutdown or safety chain alarm is active A valid space temperature and supply air temperature must be available for the fan to operate There is a unit start delay in effect when the unit is transitioning from unoccupied to occupied The following describes specific fan operation based on the Fan Mode configuration value Auto When Fan Mode is set to Auto RTU OPEN will cycle the fan on and off based on the demand for heating cooling and dehumidification There is a configurable fan off delay that is upheld before shutting the fan off after conditioning has ended Continuous When Fan Mode is set to Continuous RTU OPEN will cycle the fan based
33. Shut Fire Shutdown fire_alarm BV 7007 in 10032 BI 32 95 down Fire Shutdown R fire Status down_status BV 1005 Heat Stage 1 Relay R State heat_1 BV 2003 Heat Stage 2 Relay R State heat_2 BV 2002 Heating Lockout R W oat ht lock float SNVT temp p nviHeatLck Temperature out AV 9003 value 40069 ADF 29 105 Temp R discrete SNVT switch High CO2 co2 alarm BV 7016 in 10033 BI 33 95 nvoHiCO2Alm High Space Relative R discrete SNVT switch nvoHis Humidity sprh_hi_alarm BV 7018 in 10034 BI 34 95 PRHAIm High Space Temp R discrete SNVT_switch nvoHis Alarm spt_hi_alarm BV 7011 in 10035 BI 35 95 paceTemp High Supply Air Tem R discrete SNVT switch perature sat hi alarm BV 7020 in 10036 BI 36 95 nvoHiSATAIm HP Rev Cycle Lock R W hp rev cycle float SNVT temp p nviPRevClck out Temp lockout AV 9004 value 40071 ADF 30 105 Temp Humidistat Input R hum Status stat_status BV 1006 R discrete SNVT_switch IAQ Sensor iaq_alarm BV 7005 in 10037 BI 37 95 nvolAQSensor float Indoor Air CO2 iaq AV 1009 value 40073 ADF 31 SNVT_ppm 29 nvolAQ Indoor CO2 Sensor R W iaq ref hi pp Value Max mA m AV 9010 Indoor CO2 Sensor R W iaq ref lo pp Value Min mA m AV 9009 37 APPENDIX B THIRD PARTY POINTS LIST CON T IN ALPHABETICAL ORDER BACnet Modbus N2 LON Works A i i Network Network Point Name
34. Stage sizes Stage 04 07 and A08 A12 Two Stages sizes 08 30 Economizer Exists econ exist No Yes No No FIOP Yes FIOP Reversing Valve Type rev vlv type O output type B O output type output type Heat Type heat type Electric Gas Gas 48 Series Units Electric 50 Series Units Number of Heat Stages heat stages 1 2 0 no 0 50 series cool heat ing only units 1 All TCQs and HCQs Low Nox units single phase gas units TC04 09 low and TC05 07 med heat 3 phase gas units 2 TC04 and 08 09 med 005 09 high heat 3 phase gas units HC04 09 3 phase gas units and All 12 30 gas units Continuous Occupied Exhaust occ exh No Yes No Indoor CO2 Sensor Value 2 iaq ref lo ppm 0 9999ppm 0 Min mA Indoor CO2 Sensor Value 2 iaq ref hi ppm 0 9999ppm 2000 Max mA Outdoor CO2 Sensor Value oagq ref lo ppm 0 9999ppm 0 Min mA Outdoor CO2 Sensor Value oaq ref hi ppm 0 9999ppm 2000 Max mA Field Assistant Only System Space Temperature system spt System Cooling Demand Level cool de 0 3 0 mand level System Heating Demand Level heat de 0 3 0 mand level System Outdoor Air Temperat system oat ure TEST SERVICE TEST Service Test test enable Disable Enable Disable Fan Test fan test Disable Enable Disable Compressor 1 Test comp1 test Disable Enable Disable Compressor 2 Test compe2 test Disable Enable Disable Heat 1 Test heati test Disable Enable Disable Heat 2 Test heat2 test Disable Enable Disable Reversing Valve Te
35. T CONFIGURATION ai1 function ai2 function di3 function di3 type di5 function dib type di8 function di8 type di9 function di9 type spt type ovr dur 12 No Sensor 2 AO Sensor 3 OAQ Sensor 4 Space RH Sensor 1 No Sensor 2 IAO Sensor 3 OAQ Sensor 4 Space RH Sensor 1 No Function 2 Compressor Safety 3 Fan Status 4 Filter Status 5 Remote Oc cupancy 6 Door Contact N O N C 1 No Function 2 Fire Shut down 3 Fan Status 4 Filter Status 5 Remote Oc cupancy 6 Door Contact N O N C 1 No Function 2 Enthalpy Switch 3 Fan Status 4 Filter Status 5 Remote Oc cupancy 6 Door Contact N O N C 1 No Function 2 Humidistat 3 Fan Status 4 Filter Status 5 Remote Oc cupancy 6 Door Contact N O N C 1 T55 2 T56 use for T59 3 SPT Sensor 0 24 hours No Sensor 1 No FIOP 2 FIOP Compressor Safety N O Fire Shutdown N O 1 No FIOP 2 FIOP N O Humidistat N O T55 Unit Configuration 32 APPENDIX A USER INTERFACE MENUS CON T Configuration Menus con t BACview MENU POINT NAME OB er RANGE DEFAULT FIELD ASSISTANT MENU HOME Select function below Properties Equipment SERVICE SERVICE CONFIGURATION Service Configuration Unit Type unit_type 1 Heat Cool Heat Cool TC and 2 HP O B Ctrl HC models 3 1 HP Y1 W1 Ctrl Ctrl TCQ and HCQ models Compressor Stages comp stages One stage Two One
36. This 8 digit number refers to a date YYYYMMDD The first 4 digits are the year 2010 and the month and day 0409 so this version is April 9th 2010 21 07 30 2010 Device Instance Application Software Version 1 PRGs loaded Module 18 12 12 1610100 1 PRGs running status PRG rtu open 20100409 Firmware sections validated in flash memory Bootl6 H IAR RTU OPEN DRIVER v2 09 016 v3 04 101 Fig 16 Example Modstat Communication LED s The LED s indicate if the controller is speaking to the devices on the network The LED s should reflect communication traffic based on the baud rate set The higher the baud rate the more solid the LED s will appear Table 3 LED s Aug 13 Mar 8 C10825 The LED s on the RTU OPEN show the status of certain functions If this LED is on Status is Power The RTU OPEN has power Rx The RTU OPEN is receiving data from the network segment Tx The RTU OPEN is transmitting data over the network segment DO The digital output is active The Run and Error LED s indicate control module and network status If Run LED shows And Error LED shows Status is 2 flashes per second Off Normal 2 flashes per second 2 flashes alternating with Run LED Five minute auto restart delay after system error 2 flashes per second 3 flashes then off Control module has just been formatted 2 flashe
37. U OPEN Start up Sheet to be completed and included with the base unit check list Besides the base unit start up there are a few steps to take to properly start up the controls RTU OPEN s Service Test function should be used to assist in the base unit start up and also allows verification of output operation Controller configuration is also part of start up This is especially important when field accessories have been added to the unit The factory pre configures options installed at the factory There may also be additional installation steps or inspection required during the start up process Additional Installation Inspection Inspect the field installed accessories for proper installation making note of which ones do or do not require configuration changes Inspect the RTU OPEN s Alarms for initial insight to any potential issues See troubleshooting section for alarms Inspect the SAT sensor for relocation as intended during installation Inspect special wiring as directed below Humidi MiZer Control Wiring In units equipped with the optional Humidi MiZer option there are 2 pink wires loose in the control box used to control the dehumidification function of the unit These pink wires are meant to be ties to a space humidistat or thermidistat on an electromechanical unit On RTU OPEN equipped units these pink wires must be connected to J11 7 amp 8 to allow the OPEN board to operate the dehumidification function or the uni
38. U OPEN Inputs and Outputs BACnet OBJECT CONNECTION PIN POINT NAME NAME TYPE OF I O NUMBER S DEDICATED INPUTS Space Temp Zone Temp zone_temp Al 10K Thermistor J20 1 2 Supply Air Temperature sa temp Al 10K Thermistor J2 1 2 Outdoor Air Temperature oa temp Al 10K Thermistor J2 3 4 Space Temperature Offset Pot stpt adj offset Al 100K Potentiometer J20 3 Safety Chain Feedback safety_status DI 24 VAC J1 9 Compressor Safety Status comp_status DI 24 VAC J1 2 Fire Shutdown Status firedown_status DI 24 VAC J1 10 Enthalpy Status enthalpy_status DI 24 VAC J2 6 Humidistat Input Status humstat_status DI 24 VAC J5 7 CONFIGURABLE INPUTS Indoor Air CO2 iaq Al 4 20 ma Outdoor Air CO2 oaq Al 4 20 ma J4 2 or J4 5 Space Relative Humidity space rh Al 4 20 ma Supply Fan Status sfan status 5 24 VAC Filter Status filler status DI 24 VAC J5 1 or J5 3 or Door Contact Input door contact status DI 24 VAC J5 5 or J5 7 Occupancy Contact occ contact status DI 24 VAC OUTPUTS Economizer Output econ output AO 4 20ma J2 5 Supply Fan Relay State sfan DO Relay 24VAC 1A J1 4 Compressor 1 Relay State comp 1 DO Relay 24VAC 1A J1 8 Compressor 2 Relay State comp 2 DO Relay 24VAC 1A J1 7 Heat Stage 1 Relay State heat 1 DO Relay 24VAC 1A J1 6 Heat Stage 2 Relay State heat 2 DO Relay 24VAC 1A J1 5 Power Exhaust Relay State pexh DO Relay 24V
39. _stpt AV 3006 value 40057 ADF 23 105 nvoEffHeatSP Enthalpy BACnet R W oae BV 1901 R en Enthalpy Status thalpy_status BV 1002 fac_test_en Factory Test RW able BV 91000 Factory Test Analog R W 1 Control ao1 fac test AV 91001 Factory Test Analog RW 2 Control ao2_fac_test AV 91002 36 APPENDIX B THIRD PARTY POINTS LIST CON T IN ALPHABETICAL ORDER BACnet Modbus N2 LON Works Point Name ae BACnet Point OBJECT Register Register M ipei SNVT Type SNVT Name ite Name ID Type 5 Type Address Factory Test Relay 1 R W re Control lay1_fac_test BV 91001 Factory Test Relay 2 R W re Control lay2 fac test BV 91002 Factory Test Relay 3 R W re Control lay3 fac test BV 91003 Factory Test Relay 4 R W re Control lay4 fac test BV 91004 Factory Test Relay 5 R W re Control lay5 fac test BV 91005 Factory Test Relay 6 R W re Control lay6 fac test BV 91006 Factory Test Relay 7 R W re Control lay7 fac test BV 91007 Factory Test Relay 8 R W re Control lay8 fac test BV 91008 Fan Off Delay R W fan delay off AV 9024 R discrete SNVT switch Filter filter alarm BV 7017 in 10031 BI 31 95 nvoFilter Filter Runtime R filter rntm AV 2015 SN Filter Service Alarm R W filter_ser float VT_time_hour nviFilter Timer vice_hrs AV 2019 value 40067 ADF 28 124 AlmTime Filter Status filter status BV 1004 discrete SNVT_switch nvoFire
40. alrm hys 2 20 F 3 t Alarm Delay min deg spt_alrm_delay 0 30 minutes 10 Unoccupied Low SPT Alarm uno spt alrm lo 35 90 F 45 Limit mt Unoccupied High SPT Alarm uno spt alrm hi 45 100 F 95 Limit mt SUPPLY AIR TEMPERATURE ALARM Low SAT Alarm Limit sat lo alrm lim 15 90 F 35 High SAT Alarm Limit sat_hi_alrm_lim 90 175 F 160 SPACE HUMIDITY ALARM Low Space Humidity Alarm sprh_lo_alrm_lim 0 99 rh 30 Limit High Space Humidity Alarm sprh_hi_alrm_lim 0 99 rh 70 Limit IAQ VENTILATION ALARM Occ High CO2 Alarm Limit iaq occ hi Imt 0 9999 ppm 1200 ppm 30 APPENDIX A USER INTERFACE MENUS CON T Configuration Menus con t BACview MENU POINT NAME eis RANGE DEFAULT FIELD ASSISTANT MENU HOME Select function below Properties Equipment UNIT UNIT CONFIGURATION Unit Configuration Fan Mode fan_mode 1 Auto Continuous 2 Continu ous 3 Always On Unit Start Delay start_delay 0 30 sec 5 Fan Off Delay fan_delay_off 0 180 sec 90 Minimum Cooling SAT sat_cl_min 45 75 F 50 Maximum Heating SAT sat_ht_max 95 1 120 Vent Dmpr Pos DCV Min Pos econ_min 0 0 20 Open DCV Max Vent Damper Pos iaq_dpr_max 10 0 50 Open S Fan Service Alarm Timer sfan_service_hrs 0 9999 hr 0 Comp 1 Service Alarm Timer compl ser 0 9999 hr 0 vice hrs Comp 2 Service Alarm Timer comp2 ser 0 9999 hr 0 vice hrs Filter Service Alarm Timer filler service hrs 0 9999 hr 600 Pushbutton Override pb enable Di
41. be cleared when configuration is corrected An example of this would be Input 1 IAQ Sensor input 2 IAQ Sensor the alarm would be active unit would run but the IAQ Sensor inputs 1 amp 2 will be interpreted as No Function High Space Relative Humidity This alarm indicates the space humidity exceeds the alarm configuration High Space Humidity Alarm Limit for 10 minutes This alarm is inhibited until the RTU runs for 15 minutes to allow for system stabilization after startup Low Space Relative Humidity This alarm indicates the space humidity falls below the alarm configuration Low Space Humidity Alarm Limit for 5 minutes This alarm is inhibited until the RTU runs for 5 minutes to allow for system stabilization after startup High CO This alarm indicates the space CO level exceeds the alarm configuration Occupied High CO Alarm Limit for 1 minute This alarm will be inhibited until the RTU has been running for 2 minutes to allow for system stabilization after startup Supply Fan Runtime This alarm indicates the accumulated runtime exceeds the unit configuration Supply Fan Service Alarm Timer value when not set to 0 This alarm is most commonly used to indicate an equipment maintenance interval is due The supply fan runtime accumulator may be reset by setting the maintenance point Reset Supply Fan Runtime Alarm to Clear and then back to Run acknowledging each selection by clicking the OK button when it appea
42. ce tests Indoor and outdoor fans are controlled normally to maintain proper unit operation All normal heating alarms and alerts are functional Reversing Valve Test This test point activates the DO7 relay at J11 These rooftop units do not use reversing valve control for heat pumps therefore this test is not used 13 Dehumidification Test For units with the factory Reheat option the dehumidification relay is used to change the output status to operate the circuits in different Reheat modes Dehumidification relay on by itself puts all circuits running in Hot Gas Reheat dehumidification mode dehumidification relay on and the cooling test compressor test relays on puts unit and or individual circuits in subcooling dehumidification mode The fans and heating service test outputs are reset to Disable for the dehumidification service test Indoor and outdoor fans are controlled normally to maintain proper unit operation All normal cooling dehum alarms and alerts are functional Power Exhaust Test This point allows the board s power exhaust PE output to be manually turned On Enable and Off Disable Power Exhaust test can operate simultaneously with other Service Test Points Economizer Test This point allows the board s economizer output to be manually controlled from 0 to 100 Open Economizer test can operate simultaneously with other Service Test Points Analog Output 2 Test This test point activates t
43. compl ser vice Alarm Timer vice hrs AV 83006 Compressor 1 Test R W comp1_test BV 81005 Compressor 2 Relay R State comp_2 BV 2004 Compressor 2 R Runtime comp2_rntm AV 2018 Compressor 2 R comp2_rntm_ Runtime alarm BV 7015 Compressor 2 Ser R W comp2_ser vice Alarm Timer vice_hrs AV 83007 Compressor 2 Test R W comp2_test BV 81004 R discrete SNVT_switch nvo Compressor Safety comp_alarm BV 7013 in 10030 BI 30 95 CompSafety Compressor Safety R Status comp status BV 1008 Continuous Occu R W pied Exhaust occ_exh BV 9002 Cooling Lockout R W float SNVT temp p nviCoolLck Temperature oat cl lockout AV 9002 value 40043 ADF 16 105 Temp DCV Max Ctrl Set R W float nviD point iaq stpt max AV 3013 value 40045 ADF 17 SNVT ppm 29 CVMaxPPM DCV Max Vent R W float SNVT lev per nviDCVMax Damper Pos iaqg dpr max AV 9011 value 40047 ADF 18 cent 81 Pos Dehumidification Re R discrete SNVT switch nvoDehumRe lay State dehum BV 2006 in 10009 BI 9 95 lay Dehumidification Test R W dehum_test BV 81006 R door_con Door Contact Status tact_status BV 1010 Economizer Exists R W econ_exist BV 99001 Economizer High R W oat ec lock OAT Lockout Temp out AV 9008 R float SNVT lev per nvoEconOut Economizer Output econ output AV 2001 value 40051 ADF 20 cent 81 put Economizer Test R W econ_test AV 81001 Effective Cool Set R float SNVT_temp_p point eff cl stpt AV 3005 value 40055 ADF 22 105 nvoEffCoolSP Effective Heat Set R float SNVT_temp_p point eff_ht
44. control board Serial No ORTYMxxxxN ORT Bar Coded amp Typed Number YM XXXX 5 N The serial numbers are unique and contain embedded information These first three digits are unique to RTU OPEN and are used as an identifier These two digits identify the last digit of the year and month in hex A 10 Oct of manufacture 74 would represent a date of manufacture of April 2007 These four digits represent the sequential number of units produced for a given product for the mentioned manufacturing time period This final digit represents the decade and toggles between N and M every ten years Table 6 Basic Protocol Troubleshooting Problem Possible cause Corrective action No communication with 3rd party vendor Incorrect settings on SW1 SW2 and SW3 Verify and correct switch settings Cycle power to RTU OPEN after changing Switch settings RS485 Port has no voltage output Verify RTU OPEN has correct power supply communication bus check with RTU OPEN disconnected from RS485 Possible bad driver on board Bacnet 9600 19 2K 01 to 045vdc Check RS485 bus for external voltage Bacnet 38 4K 06 to 09vdc before reconnecting to the bus Bacnet 76 8K 1vdc Modbus 9600 76 8K 124vdc N2 9600 124vdc Verify devices are daisy chained and repeaters and bias termi
45. e SNVT_switch State sfan BV 2001 in 10023 BI 23 95 nvoSFRelay Supply Fan Runtime sfan_rntm AV 2014 sfan_rntm_ala Supply Fan Runtime rm BV 7010 Supply Fan Service R W sfan ser Alarm Timer vice hrs AV 83005 discrete SNVT switch Supply Fan Status sfan status BV 1003 in 10024 BI 24 95 nvoFanStatus Switch Configuration di_cfg_alarm BV 7025 System Cooling De cool_de mand Level mand_level AV 9006 System Heating De R heat_de mand Level mand_level AV 9036 shut System is shut down down_status BV 2011 System Mode R mode_status MSV 2001 System OAT Master R mstr_oa_temp AV 80001 System Outdoor Air RW float SNVT_temp_p Temperature system_oat AV 1901 value 40119 ADF 54 105 nviSysOAT System Space Tem float SNVT_temp_p nviSysSpaceT perature system_spt AV 1902 value 40123 ADF 56 105 emp T5x Override Dura tion RW ovr_dur AV 9023 float SNVT_time_sec nviUnit Unit Start Delay start_delay AV 9007 value 40127 ADF 58 107 StartDly Unit Type R W unit_type MSV 9018 Unocc Free Cool En RW able ntfc_ena BV 80001 Unocc Relative Hu unocc_de float SNVT_lev_per nviUnoc midity Setpoint hum_stpt AV 3012 value 40129 ADF 59 cent 81 cRHSP Vent Dmpr Pos R W float SNVT lev per nviDCVMin DCV Min Pos econ min AV 9005 value 40131 ADF 60 cent 81 Pos 40 RTU OPEN START UP SHEET RTU Model Number Date RTU Serial Number Performed by RTU OPEN Software Version Company Protoc
46. e T56 slider offset when occupied and the Unoccupied Heat Setpoint plus the T56 slider offset if unoccupied The following conditions must be true in order for this algorithm to run Indoor Fan has been ON for at least 30 seconds Cool mode is not active and the time guard between modes equals zero If occupied and SPT occupied heat setpoint plus T56 slider offset SPT and supply air temperature values are available If it is unoccupied and the SPT lt unoccupied heat setpoint plus T56 slider offset The indoor fan will be turned on by the staging algorithm OAT High OAT lockout temperature 18 If all of the above conditions are met the controller uses a PID logic loop to energize or de energize heat outputs to satisfy the heat demand If the SAT begins to exceed the high supply air setpoint a ramping function will cause the Heat Stages Capacity algorithm to decrease the number of stages until the SAT has dropped below the setpoint There is a fixed one minute minimum on time and a one minute off time for each heat output Heat staging has a 2 minute stage up and 30 second stage down delay Heat pump operation is the same as above except for what is explained below There is a fixed 3 minute on and 5 minute off time for the first heat stage output and a one minute on and one minute off time for the second heat stage output There is a 10 minute minimum stage up delay if the heat demand is lt 3 F and a 2 m
47. e associated channel falls below 3 5 mA or rises above 21 mA Cooling heating and supply fan operation continues However the controller s IAO control function uses 400ppm as the fixed outdoor air CO2 level until the fault condition is corrected Space Temperature When Occupied a Low Space Temperature alarm is generated if the space temperature falls below the lower limit or a High Space Temperature alarm is generated if the space temperature rises above the upper limit When Unoccupied an unoccupied low space temperature alarm is generated when the space temperature falls below the alarm configuration Unoccupied Low SPT Alarm Limit or an unoccupied high space temperature alarm is generated when the space temperature rises above the alarm configuration Unoccupied High SPT Alarm Limit 24 The following values are related to the Space Temperature alarm Alarming Temperature This variable displays the value of the space temperature that is in alarm and is only visible when the space temperature is in an alarm state Alarm Limit Exceeded This variable displays the value of the alarm setpoint that is exceeded by the alarming space temperature and is only visible when the space temperature is in an alarm state High Supply Air Temperature This alarm indicates the supply air temperature exceeds the alarm configuration High SAT Alarm Limit for 5 minutes This alarm is inhibited until the RTU has been running for 30 minutes to al
48. es that information to all linked controllers Linkage Air Source Modes In a linked system the air source determines its operating mode and qualifies that mode based on its own Supply Air Temperature SAT The following modes can be sent by the air source depending on its configuration Off Air source fan is off Fan Only Air source fan is on and providing ventilation neutral SAT without heating or cooling Economizer Cooling Air source fan is on and providing cooling using economizer only Cooling Air source fan is on and cooling is provided by economizer and mechanical cooling Heating Air source fan is on and heating is provided gas or electric Dehumidification Air source fan is on and Humidi MiZer is active Test The RTU Open Service Test mode is active Shutdown Air source fan is off due to Safety Chain Fire Shutdown or invalid SAT sensor Unocc Free Cooling Air source fan is on with the economizer providing cooling while unoccupied 20 TROUBLESHOOTING General The RTU OPEN controller acts as an intelligent imbedded thermostat to the rooftop unit but can be monitored and controlled from I Vu Open Linkage or a 3rd party network This causes the system as a whole to be troubleshot from three points of view The three parts to the system are the rooftop unit the OPEN controller and the network connected Determining which part needs to be troubleshot is the
49. est BV 81008 Pushbutton Override R pb_status BV 31 Reset Comp 1 R W comp1_rntm_ Runtime Alarm clr BV 7514 Reset Comp 2 R W comp2 rntm Runtime Alarm clr BV 7515 Reset Filter Runtime R W discrete SNVT switch nvoSafety Alarm filter rntm clr BV 7517 out 22 BO 22 95 Chain Reset Supply Fan RW Runtime Alarm sfan_rntm_clr BV 7510 Safety Chain R safety_alarm BV 7024 Safety Chain Feed R back safety_status BV 1009 Schedule R W schedule BV 8000 Service Test R W test_enable BV 81000 Setpoint Cooling R W float SNVT_temp_p Occupied Setpoint occ_cl_stpt AV 3001 value 40009 ADF 4 105 nviOccCoolSP Setpoint Cooling RW Setpoint Adjust cl_stpt_adj AV 2 Setpoint Cooling R W float SNVT temp p nviUnoc Unoccupied Setpoint unocc cl stpt AV 3003 value 40015 ADF 7 105 cCoolSP Setpoint Effective R W Cooling Setpoint eff_cl_stpt AV 4 Setpoint Effective R W Heating Setpoint eff_ht_stpt AV 5 Setpoint Heating R W float SNVT temp p Occupied Setpoint occ ht stpt AV 3002 value 40019 ADF 9 105 nviOccHeatSP Setpoint Heating RW Setpoint Adjust ht_stpt_adj 3 Setpoint Heating R W float SNVT temp p nviUnoc Unoccupied Setpoint unocc ht stpt AV 3004 value 40017 ADF 8 105 cHeatSP R W stpt_adj_en discrete SNVT_switch nviSPAdjEn Setpoint Adjust able BV 1013 out 26 BO 26 95 able R float SNVT_temp_p Setpoint Adjustment stpt_adj AV 1006 value 40099 ADF 44 105 nvoSPAdjust Setpoint Adjustment R W stpt adj rang float SNVT temp p nviS Range e AV 9015 va
50. ff This will end current operating mode and disable unit operation This alarm requires a fan status switch to be configured on one of the inputs Supply Fan in Hand This alarm occurs when the indoor fan is being commanded off and the fan status switch feedback is showing the fan is on This will prevent any operating mode and disable unit operation This alarm requires a fan status switch to be configured on one of the inputs Compressor Safety This alarm indicates the base unit s compressor safety circuit is energized Cooling heating and supply fan outputs are not interrupted except when the RTU OPEN is configured for Heat Pump Normal operation resumes when the compressor safety circuit is de energized If the Heat Pump is in the heating mode it will automatically replace the compressor stage s with the equivalent number of auxiliary heat stages as available For Heat Pump s with O B when configured for two stages of aux heat and two compressors Compressor 1 is replaced by Aux Heat Stage 1 and Compressor 2 is replaced by Aux Heat Stage 2 The compressor output stays on when the safety alarm is present For cooling the alarm indicates the compressors are down Space Temp Sensor This alarm occurs if the space sensor wired to the RTU OPEN is disconnected or shorted for more than 10 seconds When this occurs the Unit Status will be Shutdown and the System Mode will be Run Sensor sensor connections wiring board connecti
51. guration Filter Service Alarm Timer value when not set to 0 This alarm is most commonly used to indicate a filter replacement is due Reset the filter service runtime accumulator by setting the maintenance point Reset Filter Runtime Alarm to On back to Off and clicking the OK button after each setting Setting unit configuration Filter Service Alarm Timer value to 0 disables the filter service alarm function 25 Airside Linkage Alarm This alarm indicates that RTU OPEN was connected to a zoned system called Linkage and it lost communications with its linkage master or if it receives invalid data Third Party Networking Third party communication and networking troubleshooting should be done by or with assistance from the front end 3rd party technician A Module Status Report Modstat can be run from the BACview6 or Virtual BACview see Table 5 to perform This lists information about the board status and networking state For basic troubleshooting see Table 6 Refer to the RTU OPEN 3rd Party Integration Guide for additional information Table 5 Manufacture Date When troubleshooting you may need to know a control module s manufacture date Obtain the manufacture date from Notes a Module status report modstat 2 Then press period 3 Release both buttons To obtain a modstat with BACviewS 1 Press Function FN key and hold The report shows the date under Main board hardware Sticker on the
52. he AO2 0 10vdc analog output at J22 These rooftops do not use this output therefore this test is not used NOTE Service Test Mode does not timeout Be sure to turn off test mode or cycle power to the RTU to return to normal operation Configuration The RTU OPEN controller s configuration points effect the unit s inputs and operation Review and understand the meaning and purpose of each configuration point before changing it from the factory default value Use the RTU OPEN Start up Sheet during configuration fill in changed values if changed from factory default There are three main configurations menus SETPOINT UNIT and SERVICE Each configuration point is described below under its according menu See Appendix A for BACview menu structure Setpoint Occupied Heating Setpoint The heating setpoint the controller maintains during the occupied period Range 40 90 F Occupied Cooling Setpoint The cooling setpoint the controller maintains during the occupied period Range 55 99 F Unoccupied Heating Setpoint The heating setpoint the controller maintains during the unoccupied period Range 40 90 F Unoccupied Cooling Setpoint The cooling setpoint the controller maintains during the unoccupied period Range 55 99 F Effective Heating Setpoint The current setpoint value heating operation will control to Effective Cooling Setpoint The current setpoint value cooling operation will control to Optimal
53. he unit The three types that can be used are a standard 10k Type II thermistor T55 sensor with a setpoint offset slider bar T56 or a communicating sensor SPT Sensor Range T55 T56 or SPT Sensor Default T55 T5x Override Duration Sets the override time duration the unit will change from unoccupied to occupied when the override button is pushed on the space sensor Range 0 24 hours Default 1 hour Service Unit Type This tells the control what type of unit it is controlling Heat Cool refers to gas and electric heat units HP O B Ctrl refers to a heat pump unit which requires reversing valve control HP Y1 W1 Ctrl refers to a heat pump unit whose reversing valve is built in to the cooling or heating call Factory Default Heat Cool for non heat pump units or HP 1 1 Ctrl for heat pump units Compressor Stages This refers to the number of mechanical cooling stages available on a specific unit Set this point to One Stage if there is one compressor in the specific unit set to Two Stage if there are two compressors in the unit and set to None if economizer cooling ONLY is desired Factory Default One Stage for 1 compressor units or Two Stages for 2 compressor units Economizer Exists This tells the controller if there is an economizer installed on the unit Factory Default 2 NO if no economizer or YES if there is an economizer installed Reversing Valve Type Sets
54. hich the fan will continue run after being commanded off Range 0 180sec Default 90sec Minimum Cooling SAT The supply air temperature must remain above this value to allow cooling with the economizer and or compressors There is 5 F plus and minus deadband to this point If the SAT falls below this value during cooling a compressor stage will be removed and or the economizer will return to minimum position Range 45 70 F Default 50 F Maximum Heating SAT The supply air temperature must remain below this value to allow heating There is 5 F plus and minus deadband to this point If the SAT falls below this value during heating the heat stages will begin to decrease until the SAT has dropped below this value Range 95 150 F Default 120 F 14 Vent Dmpr Pos DCV Min Pos Minimum damper position for ventilation during the occupied period Range 95 150 F Default 120 F DCV Max Vent Damper Pos This is the greatest position the economizer can open to while trying to control the indoor air quality levels Range 10 60 open Default 50 open S Fan Service Alarm Timer The timer set for the Supply Fan Runtime Alarm After the number of hours set on this point is exceeded the corresponding alarm will be generated and must be manually cleared in the maintenance menu after the maintenance has been completed The timer will then begin counting its runtime again for the next due maintenance NOTE Default
55. inute minimum stage up delay if heat demand is gt 3 F The stage down delay is still 30 seconds If the Compressor Safety Alarm is active the second heat stage will come on with the first stage with no delay Indoor Air Quality If the optional indoor air quality sensor is installed the RTU OPEN will maintain indoor air quality within the space at the user configured differential set point The set point is the difference between the indoor air quality and an optional outdoor air quality sensor If the outdoor air quality is not present then a fixed value of 400ppm is used The following conditions must be true in order for this algorithm to run The mode is occupied Indoor Fan has been ON for at least 30 seconds Indoor Air Quality sensor has a valid reading As air quality within the space changes the minimum position of the economizer damper will be changed thus allowing more or less outdoor air into the space depending on the relationship of the indoor air quality to the differential setpoint If all the above conditions are true the IAQ algorithm will run and calculates an IAQ minimum position value using a PID loop The IAQ minimum damper position is then compared against the user configured economizer minimum position and the greatest value becomes the final minimum damper position of the economizer output If the calculated IAQ minimum position is greater than the DCV Max Vent Damper Pos configuration then it will
56. is displayed as Dirty on the controller graphic An alarm indicates a dirty filter Door Switch A Door Contact may be configured on any unused binary input A typical application is an occupancy sensor mounted within the space served by a single zone rooftop Door Contact disables mechanical cooling and electric or gas heating when active Economizer cooling if available continues to operate Linkage The RTU OPEN may serve as an air source to an OPEN Variable Volume Terminal VVT system When the RTU OPEN is part of a VVT system and the controllers are wired together to form a network the controllers may use a method of communication known as Linkage Linkage is a method by which an air source and its subordinate zone terminals exchange data to form a coordinated HVAC system The system s air source controller zone controllers and bypass controller are linked so that their data exchange can be managed by one zone controller configured as the VVT Master The VVT Master gathers the following information from the slave zone controllers occupancy status setpoints Zone temperature relative humidity e CO level damper position optimal start data The VVT Master performs mathematical calculations and algorithms on the data and then sends the composite information to the air source The VVT Master receives information from the air source such as mode supply air temperature and outside air temperature and pass
57. izer plug on pin 4 or the black wire connected to the actuator for the enthalpy s GND connection Power can also be provided direct from the unit transformer and J5 terminal on the RTU OPEN J2 7 or J5 2 24 VAC for enthalpy switch power J2 6 or J5 1 input signal Differential Enthalpy Differential enthalpy control requires both an enthalpy switch receiver 33CSENTHSW and an enthalpy sensor 33CSENTSEN The enthalpy sensor must be installed in the field as the factory can only provide single enthalpy The enthalpy sensor must be mounted in the return airstream and calculates the enthalpy of the indoor air The relay is energized when the enthalpy detected by the return air enthalpy sensor is less than the enthalpy at the enthalpy switch receiver The relay is de energized when the enthalpy detected by the return air enthalpy sensor is greater than the enthalpy at the enthalpy switch receiver differential enthalpy control J4 1 or J4 4 24 VDC Supply Voltage J4 2 or J4 5 4 to 20 mA Current Loop Output to RTU OPEN Relative Humidity Sensor Polarized Male Connector S Z 4 20 VAC GND 0 5V mA or VDC or 0 7 7 C10839 Fig 9 Duct Relative Humidity Sensor Typical Wiring To wire return air enthalpy sensor Connect the 4 20 mA In terminal on the enthalpy switch recei
58. le SPT reading is available OAT High OAT economizer lockout configuration default 75 OAT lt SPT If any of the mentioned conditions are not true the economizer will be set to its configured minimum position The minimum damper position can be overridden by the IAQ routine described later in this section If the above conditions are true the Economizer control will calculate a damper position starting with a minimum vent position and based on current space temperature and a setpoint that is halfway between the effective cool and heat setpoints If the SAT drops below the cooling low supply air setpoint 5 F the economizer will ramp down to minimum position Power Exhaust If RTU OPEN is also controlling an exhaust fan it can be enabled based on damper position or by occupancy If configured for continuous occupied operation it will be energized whenever the controller is in the occupied mode and disabled when in the unoccupied mode If configured for damper position control it will be energized whenever the economizer exceeds the power exhaust setpoint and disabled when the economizer drops below the setpoint by a fixed hysteresis of 10 Heating The heat outputs are controlled by the Heating Control PID Loop and Heating Stages Capacity algorithm They will be used to calculate the desired number of stages needed to satisfy the space by comparing the SPT to the Occupied Heat Setpoint th
59. low for system stabilization after startup Low Supply Air Temperature This alarm indicates the supply air temperature falls below the alarm configuration Low SAT Alarm Limit for 5 minutes This alarm is inhibited until the RTU has been running for 30 minutes to allow for system stabilization after startup Setpoint Slider This alarm indicates an open circuit is detected at the setpoint adjustment input This can only occur if the Space Sensor Type is set to T56 Note that only an open circuit results in an alarm A short across this input offsets the setpoints negatively by the amount configured by configuration Setpoint Adjustment Range Switch Configuration This occurs if more than one binary input inputs 3 5 8 and 9 is configured for the same function When this happens the two inputs or more configured wrong will be disabled as an inputs This alarm will automatically be cleared when configuration is corrected An example of this would be Input 3 Compressor Safety input 5 Fan Status input 8 Fan Status and input 9 Humidistat the alarm would be active unit would run compressor safety and humidistat would function normally and Fan Status inputs 5 amp 8 will be interpreted as No Function Analog Input Configuration This occurs if more than one analog input inputs 1 amp 2 is configured for the same sensor When this happens the two inputs will be disabled as inputs This alarm will automatically
60. lue 40101 ADF 45 105 PAdjRange Setpoint Slider R Slidepot alarm BV 7002 Shutdown R W shutdown BV 9001 Space Relative Hu R float SNVT_lev_per midity space_rh AV 1011 value 40103 ADF 46 cent 81 nvoSpaceRH Space Relative Hu R discrete SNVT_switch nvoSpaceRH midity Sensor sprh_alarm BV 7022 in 10045 BI 45 95 Sensor Space sensor type R W spt_type MSV 9001 over Space Temp Over R W ride_time_re ride Time Remaining maining AV 1 Space Temp Zone R Temp zone_temp Al 1 discrete SNVT_switch nvoSPTemp Space Temp Sensor spt_fail BV 7001 in 10046 BI 46 95 Sensor Space Temp Sensor spt status MSV 2003 Spt alrm statu Space Temperature s BV 37 Space Temperature R float SNVT_temp_p nvoSpaceTem Prime Variable space_temp AV 2007 value 40107 ADF 48 105 p Space Temperature R Offset Pot stpt_adj_offset AV 91006 39 APPENDIX B THIRD PARTY POINTS LIST CON T IN ALPHABETICAL ORDER BACnet Modbus N2 LON Works Point Name wae BAGIA Point OBJECT Register Register M Nanok SNVT Type SNVT Name ame ID Type Type Address Supply Air Temp R discrete SNVT_switch nvoSAT Sensor sat_alarm BV 7004 in 10047 BI 47 95 Sensor Supply Air Temperat R float SNVT_temp_p ure sa_temp AV 1008 value 40109 ADF 49 105 nvoSAT R sfan_fail_alar Supply Fan Failure m BV 7008 R sfan_hand_ala Supply Fan in Hand rm BV 7009 Supply Fan Relay discret
61. ment Temperature measured by thermocouple and temperature determined from thermistor voltage reading should be close within 5 F if care was taken in applying thermocouple and taking readings If a sensor must be corrected use the RTU OPEN s calibration function to offset the temperature reading Table 2 Thermistor Resistance vs Temperature Values for Space Temperature Sensor Supply Air Temperature Sensor and Outdoor Air Temperature Sensor TEMP TEMP RESISTANCE C F Ohms 40 40 335 651 95 31 242 195 90 22 176 683 25 13 130 243 20 4 96 974 15 5 72 895 10 14 55 298 5 23 42 315 0 32 32 651 5 41 25 395 10 50 19 903 15 59 15 714 20 68 12 494 25 77 10 000 30 86 8 056 35 95 6 530 40 104 5 325 45 113 4 367 50 122 3 601 55 131 2 985 60 140 2 487 65 149 2 082 70 158 1 752 Software Version During Start up and throughout the life of the equipment it may be necessary to obtain the RTU OPEN s software version To do this a Modstat must be run on the controller This can be done from the BACview user interface by holding the function FN key and pressing the period key An example of the beginning lines of a Modstat is shown in Fig 16 The application software version shows the current running software of the board In this case the rtu_open 20100409 refers to RTU OPEN software version 20100409
62. nators are correctly installed Check 3rd party vendor 1485 communication wiring guidelines and troubleshooting procedures 26 APPENDIX A USER INTERFACE MENUS Field Assistant Navigation Properties L Equipment Status Configuration Unit Configuration Setpoints Alarm Configuration Service Configuration Maintenance Alarms Linkage BACview Navigation STANDBY HOME SYSTEM SETTINGS STATUS CONFIG MAINT ALARM 4 LINKAGE SETPOINT Login Exceptions Clockset gt SETPOINT CALIBRATE INPUT C SETPOINT Sched SERVICE LINKAGE TEST Modstat screen only reached by FN APPENDIX A USER INTERFACE MENUS CON T Standby BACview Screen and Login Screen BACview MENU POINT NAME BACnet OBJECT VALUE STANDBY RTU OPEN 1 Off 2 Fan Only 3 Economizer 4 Cooling 5 Heating 6 Dehumidification 7 Test 8 Shutdown 9 Unocc Free Cooling Operating Mode run_status NTFC Space Temperature space_temp XXX F Press any key to activate HOME Select function below LOGIN LOGOUT Admin or User Password user 0000 Admin 1111 System Settings Menu BACview MENU POINT NAME BACnet OBJECT DEFAULT HOME Select function below SYSTEM SETTINGS SYSTEM SETTINGS BACnet Device Instance XXXXXXX 1610100 BACnet Base BACnet Device ID XXXXXXX 1610100 Autogenerate Device ID Y N Y Keypad Configuration Keypad Inactivity Timeout 1 255 minutes 10 B
63. o 99 Johnson N2 N2 is not a standard protocol but one that was created by Johnson Controls Inc that has been made open and available to the public The speed of N2 network is limited to only 9600 baud Physical Addresses can be set from 01 to 99 LonWorks LonWorks is an open protocol that requires the use of Echelon s Neuron microprocessor to encode and decode the LonWorks packets In order to reduce the cost of adding that hardware on every module a separate LonWorks Option Card LON OC was designed to connect to the RTU OPEN This accessory card is needed for LonWorks and has to be ordered and connected using the ribbon cable to plug J15 The RTU OPEN s baud rate must be set to 38 4k to communicate with the LON OC The address switches SW1 amp SW2 are not used with LonWorks 11 e oc ie yea s Tr U nm C10817 Fig 14 LON OC and LON Network Wiring Local Access BACview Handheld The BACview is a keypad display interface used to connect to the RTU OPEN to access the control information read sensor values and test the RTU See Fig 15 This is an accessory interface that does not come with the RTU OPEN controller You connect the BACview to the RTU OPEN s J12 local access port or one of the communicating space sensor s access port There are 2 password protected levels in the display User and Admin The user password is defaulted to 0000 but can be changed The Admin password is 1
64. ol and Boad Rate Network Address CONFIGURATION POINTS BACview BACnet MENU POINT NAME OBJECT RANGE DEFAULT ENTRY HOME Select function below CONFIG CONFIGURATION SET SETPOINTS POINT Occupied Heating Setpoint occ ht stpt 40 90 F 70 Occupied Cooling Setpoint occ_cl_stpt 55 99 F 74 Unoccupied Heating Setpoint unocc_ht_stpt 40 90 F 55 Unoccupied Cooling Setpoint unocc_cl_stpt 55 99 F 90 Effective Cool Setpoint eff cl stpt XX F Effective Heat Setpoint eff_ht_stpt XX F Optimal Start optm_start 0 4 hr 4 Occ Relative Humidity Setpoint occ dehum stpt 0 unocc setpoint 60 9erh Unocc Relative Humidity Setpoint unocc de 30 100 rh 95 hum stpt DCV Max Ctrl Setpoint iaq stpt max 0 9999 ppm 650 Power Exhaust Setpoint pexh stpt 20 90 Open 50 ALARMS ALARM CONFIGURATION SPACE TEMPERATURE ALARM Occupied Alarm Hysteresis occ_spt_alrm_hyst 2 2 F 3 Alarm Delay min deg spt_alrm_delay 0 30 minutes 10 Unoccupied Low SPT Alarm Limit uno_spt_alrm_lo_ 35 90 F 45 mt Unoccupied High SPT Alarm Limit uno spt alrm hi 45 100 F 95 mt SUPPLY AIR TEMPERATURE ALARM Low SAT Alarm Limit sat_lo_alrm_lim 15 90 F 35 High SAT Alarm Limit sat_hi_alrm_lim 90 175 F 160 SPACE HUMIDITY ALARM Low Space Humidity Alarm Limit sprh_lo_alrm_lim 0 99 rh 30 High Space Humidity Alarm Limit sprh_hi_alrm_lim 0 99 rh 70 IAQ VENTILATION ALARM Occ High CO2 Alarm Limit ppm iaq occ hi Imt 0 9999 ppm 1200 41 CONFIGURATION POINTS CON T
65. on and configurations should be checked for faults or errors Alarm will reset automatically when cause is fixed Supply Air Temp Sensor This alarm occurs immediately when the supply air temperature sensor wired to the RTU OPEN is disconnected or shorted When this occurs the Unit Status will be Shutdown and the System Mode will be Run Sensor sensor connections wiring board connection and configurations should be checked for faults or errors Alarm will reset automatically when cause is fixed Outdoor Air Temp Sensor Alarm This alarm indicates a shorted or open circuit in the OAT input Cooling heating and supply fan operation continues OAT lockouts will not operate while the sensor is in alarm Economizer cooling and optimal start functions are disabled Normal operation resumes when the controller detects a valid sensor Space Relative Humidity Sensor This alarm indicates the mA input at the associated channel falls below 3 5 mA or rises above 21 mA Cooling heating and supply fan operation continues however the controller s Humidi MiZer binary output is disabled until the fault condition is corrected IAQ Sensor This alarm indicates the mA input at the associated channel falls below 3 5 mA or rises above 21 mA Cooling heating and supply fan operation continues However the controller s IAQ control function is disabled until the fault condition is corrected OAQ Sensor This alarm indicates the mA input at th
66. on on I Vu BACnet MS TP BACnet Master Slave Token Passing MS TP is used for communicating BACnet over a sub network of BACnet only controllers This is the default Carrier communications protocol Each RTU OPEN module acts as an MS TP Master The speed of an MS TP network can range from 9600 to 76 8K baud Physical Addresses can be set from 01 to 99 10 SW3 Protocol Selection PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1 BACnet MS TP Master Unused OFF OFF OFF ON OFF Select Baud Select Baud Modbus Unused OFF OFF ON ON OFF Select Baud Select Baud Slave N2 Slave Unused OFF OFF OFF ON ON OFF OFF LonWorks Unused ON ON OFF ON OFF OFF ON NOTE DS Dip Switch c Set t BACnet MS TP SW3 example shown Guten Set to MSTP y Unused Port master baud Baud Rate Selections pi l BAUD RATE DS2 DS1 9600 OFF OFF 79 200 ON OFF og m m non f 38 400 OFF ON 1 D 7 a 5 l x E 76 800 ON ON ON Protocol Selector DIP Switches C07166 Fig 11 RTU OPEN SW3 Dip Switch Settings C10815 Fig 12 RTU OPEN Address Switches Fig 13 Network Wiring C10816 Modbus The RTU OPEN module can speak the Modicon Modbus RTU Protocol as described in the Modicon Modbus Protocol Reference Guide PI MBUS 300 Rev J The speed of a Modbus network can range from 9600 to 76 8K baud Physical Addresses can be set from 01 t
67. or Safety comp alarm Alert Generated Automatic Compressor would not start Faulty shorted or open thermis Space Temp Sensor spt fail Ramp down Operations Automatic tor caused by wiring error or loose connection Faulty shorted or open thermis Air Temp sat_alarm Economizer Disabled Automatic tor caused by wiring error or loose connection Faulty shorted or open thermis Outdoor Air Temp Economizer and Low ambient hs oat alarm Automatic tor caused by wiring error or Sensor Alarm DX cooling lockout disabled loose confection Sensor reading is out of range Space Relative sprh_alarm Dehumidification disabled Automatic Bad sensor bad wiring or sensor Humidity Sensor i configured incorrectly Sensor reading is out of range IAQ Sensor iaq_alarm No IAQ Operation Automatic Bad sensor bad wiring or sensor configured incorrectly Sensor reading is out of range OAQ Sensor oaq_alarm Set OAQ to 400 Automatic Bad sensor bad wiring or sensor configured incorrectly Space value is less then the low z allowed value or Space value is Space Temperature spt_alrm_status Alert Generated Automatic greater then the high allowed value Alarming Shows temperature that Temperature spt_alrm_temp caused alarm NA NA spt alrm Imt nbi limit that was ex N A N A High Supply Air I SAT is greater then the configura Temperature Sahl alarm ES 6 tion for more then 5 minutes Low Supply Air SAT is less then the configura
68. or night time free cooling NTFC operation Default Disable Setpoint Separation Sets the minimum separation gap in which setpoints can be set Range 2 10 F Default 5 F Occupancy Source Tells the controller which method of occupancy control to use in determining occupancy of the rooftop Refer to Occupancy in the operation section for detail on each specific operation function Range Always Occupied BACnet Schedule BAS On Off or Remote Occ Input Default Always occupied Inputs Input 1 Function This input is an analog input and can be configured to be one of four different inputs No Sensor IAQ Sensor OAQ Sensor or Space RH Sensor Input 1 is wired to pin J4 5 Default No Sensor Input 2 Function This input is an analog input and can be configured to be one of four different inputs No Sensor IAQ Sensor OAQ Sensor or Space RH Sensor Input 2 is wired to pin J4 2 Software Default No Sensor Factory Default IAQ Sensor with factory installed CO2 sensor Input 3 This input is a discrete input and can be configured to be one of six different functions No Function Compressor Safety Fan Status Filter Status Remote Occupancy or Door Contact This input can also be configured to be either a Normally Open N O or a Normally Closed N C switch Input 3 is factory wired to pin J1 2 Field accessories can be wired to its parallel pin J5 5 Factory Default Compressor Safety and N O 15
69. ough the network To turn Service Test on change the value of Test Mode to ON to turn Service Test off change the value of Test Mode to OFF NOTE Service Test mode is password protected when accessing from the display Depending on the unit model factory installed options and field installed accessories some of the Service Test functions may not apply Fan Test This point allows the board s fan output to be manually turned On Enable and Off Disable Other test points that require the fan for operation will automatically turn the fan on and this point will still show Disable Fan test can operate simultaneously with other Service Test Points Compressor 1 and Compressor 2 Test The compressor test points are used to change output status for the individual compressors Compressor starts are not staggered The fan and heating service test outputs are reset to Disable for the compressor service tests The Indoor fan and outdoor fans are controlled normally to maintain proper unit operation All normal cooling alarms and alerts are functional NOTE Compressor 1 is always operated with Compressor 2 due to outdoor fan control on Compressor 1 Always test Compressor 1 first and leave it on to test Compressor 2 Heat 1 and Heat 2 Test The heat test points are used to change output status for the individual heat stages gas or electric The fans and cooling service test outputs are reset to Disable for the heat servi
70. rs Setting unit configuration Supply Fan Service Timer value to 0 disables the supply fan runtime alarm function Compressor 1 Runtime This alarm indicates the accumulated runtime exceeds the unit configuration Compressor 1 Service Alarm Timer value when not set to 0 This alarm is most commonly used to indicate an equipment maintenance interval is due The Compressor 1 Runtime accumulator may be reset by setting the maintenance point Reset Comp 1 Runtime Alarm to Clear and then back to Run acknowledging each selection by clicking the OK button when it appears Setting unit configuration Compressor 1 Service Timer value to 0 disables the Compressor 1 Runtime alarm function Compressor 2 Runtime This alarm indicates the accumulated runtime exceeds the unit configuration Compressor 2 Service Alarm Timer value when not set to 0 This alarm is most commonly used to indicate an equipment maintenance interval is due The Compressor 2 runtime accumulator may be reset by setting the maintenance point Reset Comp 2 Runtime Alarm to Clear and then back to Run acknowledging each selection by clicking the OK button when it appears Setting unit configuration Compressor 2 Service Timer value to O disables the Compressor 2 runtime alarm function Note that this function is unavailable if the service configuration Compressor Stages value is not set to Two Stages Filter This alarm indicates the accumulated runtime exceeds the unit confi
71. run in Subcooling dehumidification mode Individual unit circuits can be in different dehumidification modes based on the demand Refer to the base units operation for additional information NOTE There is a fixed 5 hysteresis that the indoor relative humidity must drop below the active setpoint to end the dehumidification mode and de energize the dehumidification output The output will also de energize if the fan relay is de energized Demand Limit If the RTU OPEN receives a level 1 one degree offset 2 two degree offset or a 3 4 degree offset to the BACnet demand limit variable the controller will outwardly expand the heating and cooling setpoints by the configured demand limit setpoint value and remain in effect until the BACnet demand limit variable receives a 0 value Unoccupied Free Cooling When the unit is equipped with an economizer the control can run a night time free cooling NTFC mode called Unocc Free Cooling In this mode the damper is utilized to bring in outdoor air for free cooling during unoccupied periods The following conditions must be true for unoccupied free cooling to operate Unocc Free Cool Enable set to Enable The system is unoccupied The outside air temperature is below the Economizer High OAT Lockout Temp The outside air temperature is less than the space temperature Enthalpy if enabled is Low When the RTU OPEN schedule is unoccupied and the space temperature rises at lea
72. ry default control for the Humidi MiZer option To wire in the field e J5 8 24 VAC source for dry contact e JS 7 Signal input Single Enthalpy Outdoor Enthal The outdoor enthalpy switch receiver 33CSENTHSW senses temperature and humidity of the air surrounding the device and calculates the enthalpy when used without an enthalpy sensor The relay is energized when enthalpy is high above 28 BTU Ib OR dry bulb temperature is above 75 F and de energized when enthalpy is low below 27 BTU Ib AND dry bulb temperature is below 74 5 F The enthalpy input is dedicated to input 8 and tells the RTU OPEN when the outside air enthalpy is HIGH or LOW The normal condition for the enthalpy input is HIGH Enthalpy is configured on input 8 in the factory when it is added as an option NOTE The enthalpy calculation is done using an average altitude of 1000 ft above sea level For field installation refer to the enthalpy accessory instructions For wiring see below and Fig 10 The RTU OPEN board provides 24vac on one of the two loose grey wires in the return air section of the rooftop near the 12 pin economizer plug To determine the correct grey measure the voltage on the wires with power applied to the unit If 24 vac is sensed then that is the grey wire that is connected to the RTU OPEN board at J2 7 The other is the signal for input 8 connect it to the LOW Enthalpy terminal on the enthalpy switch receiver Tie into the 12 pin econom
73. s Refer to the configuration section for details on configuring inputs for specific functions and state Refer to Fig 1 for wire terminations at J5 Fan Status The fan status accessory is a field installed accessory This accessory detects when the indoor fan is moving air When installing this accessory the unit must have a free input input 3 5 8 or 9 One of the dedicated functions Humidistat Fire shutdown Enthalpy or Compressor safety must not be in use to configure Fan Status Refer to the configuration section for details on configuring inputs for specific functions and state Refer to Fig 1 for wire terminations at J5 Remote Occupancy The remote occupancy accessory is a field installed accessory This accessory provides an input to change the units occupancy status When installing this accessory the unit must have a free input input 3 5 8 or 9 One of the dedicated functions Humidistat Fire shutdown Enthalpy or Compressor safety must not be in use to configure remote occupancy Refer to the configuration section for details on configuring inputs for specific functions and state Refer to Fig 1 for wire terminations at J5 GND C J2 7 or 24vac R OO HI LOW GND 24 4 20 24 36 ENTHALPY VAC mA VDC ES 33CSENTHSW 33CSENTSEN C10821 Fig 10 Enthalpy Switch and Sensor Wiring Communication Wiring Protocols General Protocols are the communication languages
74. s per second 4 flashes then pause Two or more devices on this network have the same ARC156 network address 2 flashes per second On Exec halted after frequent system errors or control pro grams halted 5 flashes per second On Exec start up aborted Boot is running 5 flashes per second Off Firmware transfer in progress Boot is running 7 flashes per second 7 flashes per second alternating with Ten second recovery period after brownout Run LED 14 flashes per second 14 flashes per second alternating with Brownout Run LED On On Failure Try the following solutions Turn the RTU OPEN off then on Format the RTU OPEN Download memory to the RTU OPEN Replace the RTU OPEN 22 Table 4 RTU OPEN Alarms BACnet Object ACTION TAKEN BY POINT NAME NAME CONTROL RESET METHOD PROBABLE CAUSE Over load Indoor Fan or Electric Safety Chain safety alarm Immediate Shutdown Automatic Heater overheat a Smoke detected by smoke de Fire Shutdown fire alarm Immediate Shutdown Automatic tector or configuration incorrect Tripped Circuit Breaker Broken F Immediately disable A belt Bad indoor fan motor Con Supply Fan Failure sfan_fail_alarm Operation Automatic figuration incorrect Bad fan status switch Bad Fan Status Switch Configur Supply Fan in Hand sfan hand alarm Ramp down Operations Automatic ation incorrect Compress
75. sable En Enable able Setpoint Adjustment stpt adj enable Disable En Enable able Setpoint Adjustment Range stpt adj range 0 5 5 F Cooling Lockout Temperature oat_cl_lockout 0 80 F 45 Economizer High OAT Lockout oat_ec_lockout 55 80 F 75 Temp HP Rev Cycle Lockout Temp hp_rev_cycle_loc 20 30 F 3 kout Heating Lockout Temperature oat_ht_lockout 35 15 F 65 Unocc Free Cool Enable ntfc_ena Disable En Disable able Setpoint Separation min_stpt_sep 2 10 F 5 Occupancy Source occ_source 1 Always Always Occupied occupied 2 BACnet Schedule 3 6 5 On Off 4 Remote Occ Input CALIBRATE SENSOR CALIBRATION Space Temperature Icl_space_temp Space Temp Calibration spt_offset 9 9 10 F 0 Supply Air Temperature Icl_sa_temp Supply Air Temp Calibration sat_offset 9 9 10 F 0 Outdoor Air Temperature Ic_oa_temp Outdoor Air Temp Calibration oat_offset 9 9 10 F 0 31 APPENDIX A USER INTERFACE MENUS CON T Configuration Menus con t BACview MENU HOME POINT NAME BACnet OBJECT RANGE Select function below DEFAULT FIELD ASSISTANT MENU Properties Equipment INPUT Input 1 Function Input 2 Function Input 3 Function Input 3 Switch Configuration Input 5 Function Input 5 Switch Configuration Input 8 Function Input 8 Switch Configuration Input 9 Function Input 9 Switch Configuration Space sensor type T5x Override Duration INPU
76. scharge supply air sensor with the unit and is pre wired On 04 16 size units the SAT is secured to the unit s supply duct opening This sensor must be relocated into the supply duct during unit installation On 17 30 size units the SAT is mounted through the side of the heat chamber below the fan deck and does NOT require relocation Outdoor Air Sensor OAT The OAT is supplied with the economizer option or accessory It is wired through the 12 pin plug PL6 in the return air section of the unit and is mounted on the economizer assembly Space Temperature Sensor SPT There are 2 types of SPT sensors available from Carrier resistive input non communicating T55 T56 and T59 and Rnet communicating SPS SPPL SPP and SPPF sensors Each type has a variety of options consisting of timed override button set point adjustment a LCD screen and communication tie in Space temperature can be also be written to from a building network or zoning system However it is still recommended that return air duct sensor be installed to allow stand alone operation for back up Refer to the configuration section for details on controller configurations associated with space sensors PIY ynd z lIonuoS Ne I
77. spoken by control devices The main purpose of a protocol is to communicate information in the most efficient method possible Different protocols exist to provide different kinds of information for different applications In the BAS application many different protocols are used depending on manufacturer Protocols do not change the function of a controller just make the front end user different The RTU OPEN can be set to communicate on four different protocols BACnet Modbus N2 and LonWorks Switch 3 SW3 on the board is used to set protocol and baud rate Switches 1 and 2 SW1 and SW2 are used to set the board s network address See Fig 11 and 12 for protocol switch settings and address switches The 3rd party connection to the RTU OPEN is through plug J19 See Fig 13 for wiring Refer to the RTU OPEN 3rd Party Integration Guide for more detailed information on protocols 3rd party wiring and networking NOTE Power must be cycled after changing the SW1 3 switch settings I Vu OPEN I Vu OPEN is a Carrier front end and Building Automation System BAS It is a web based network system that uses a native BACnet over MS TP communication protocol The speed of the network can range from 9600 to 76 800 baud OPEN devices communicate with a proprietary language called Linkage on I Vu OPEN Linkage is established automatically and allows the flow of specific data across OPEN devices Refer to I Vu OPEN literature for more informati
78. st 1 degree above the Occupied Cooling Setpoint the supply fan starts The economizer damper opens as necessary to cool the space The RTU OPEN continues to operate in this mode until the space is satisfied or the outside air conditions are no longer suitable for free cooling 19 Optimal Start The RTU OPEN may utilize Optimal Start which adjusts the effective setpoints to achieve the occupied setpoints by the time scheduled occupancy begins The Optimal Start recovery period may begin as early as 4 hours prior to occupancy The algorithm works by moving the unoccupied setpoints toward the occupied setpoints The rate at which the setpoints move is based on the outside air temperature design temperatures and capacities The following conditions must be true for unoccupied free cooling to operate Under SETPOINT Optimal Start Value must be set greater than zero and less than or equal to four 0 disables Optimal Start The system is unoccupied The RTU OPEN has a valid outside air temperature The RTU OPEN is running occupancy based on a schedule were next time occupied is known Fire Shutdown Fire Shutdown may be configured on Binary Input 5 A typical application involves a smoke detector or fire shutdown contact which when active immediately shuts down equipment operation Compressor Safety Compressor Safety may be configured on Binary Input 3 A compressor safety tripped indicator circuit is available on
79. st rev vlv test Disable Enable Disable Dehumidification Test dehum test Disable Enable Disable Power Exhaust Test pexh test Disable Enable Disable Economizer Test econ test 0 100 Open 0 Analog Output 2 Test ao2 test 0 100 0 33 APPENDIX A USER INTERFACE MENUS CON T Maintenance Menu FIELD ASSISTANT BACview MENU POINT NAME BACnet OBJECT RANGE MENU HOME Select function below Properties Equipment MAINT UNIT MAINTENANCE Maintenance Occupancy Status occ_status Occupied Unoccupied Space Temp Sensor spt_status 1 Sensor Failure 2 SPT Sensor 3 6 4 Network 5 Airside Linkage 6 Locked Value Setpoint Adjustment stpt_adj x F System Cooling Demand Level cool demand level x System Heating Demand Level Safety Chain Feedback Fire Shutdown Status Compressor Safety Status heat_demand_level safety_status firedown_status comp_status x Off Run Enabled Run Enabled Shut down Normal Trouble Active Compressor Stages comp_run x Active Heat Stages heat_run x Enthalpy Status enthalpy_status High Low Humidistat Input Status humstat_status Low High Filter Status filter_status Clean Dirty Door Contact Status door_contact_status Off On Reset Supply Fan Runtime Alarm sfan_rntm_clr Run Clear Reset Comp 1 Runtime Alarm comp1_rntm_clr Run Clear Reset Comp 2 Runtime Alarm comp2_rntm_clr Run Clear Reset Filter Runtime Alarm filter_rntm_clr Off On OCCUPANCY MAINTENANCE BAS On Off keypad_ovrde 1 Inactive
80. t Disconnect the J11 Phoenix style connector form the board and use the plug screws to secure the pink wires in pins 7 and 8 reconnect the plug to the board at J11 Power Exhaust Relay Power The relay used by the RTU OPEN board to control power exhaust is a dry contact which means it does not have 24vac This 24vac must be connected to the relay to allow it operate the power exhaust relay in the PE accessory A 24vac source should be provided to the J11 2 pin on the RTU OPEN This can be provided by the unit s transformer from various sources The R terminal on the unit s low voltage terminal board LVTB is a logical source Service Test The Service Test function can be used to verify proper operation of compressors heating stages indoor fan power exhaust fans economizer and dehumidification Use of Service Test is recommended at initial system start up and during troubleshooting See Appendix A for Service Test Mode table Service Test mode has the following changes from normal operation Outdoor air temperature limits for cooling circuits economizer and heating are ignored Normal compressor time guards and other staging delays are ignored The status of Alarms except Fire and Safety chain is ignored but all alerts and alarms are still broadcasted on the network Service Test can be turned ON OFF at the unit display or from the network Once turned ON other entries may be made with the display or thr
81. t may automatically start if power is disconnected GENERAL The RTU OPEN controller is an integrated component of the Carrier rooftop unit Its internal application programming provides optimum performance and energy efficiency RTU OPEN enables the unit to run in 100 stand alone control mode Carrier s I Vu Open network or a Third Party Building Automation System BAS On board DIP switches allow you to select your protocol and baud rate of choice among the four most popular protocols in use today BACnet Modbus Johnson N2 and LonWorks See Fig 1 Carrier s diagnostic display tools such as Field Assistant BACview6 Handheld or Virtual BACview can be used with the RTU OPEN controller Access is available via a 5 pin J12 access port SENSOR ACCESSORY INSTALLATION There are a variety of sensors and accessories available for the RTU OPEN Some of these can be factory or field installed while others are only field installable The RTU OPEN controller may also require connection to a building network system or building zoning system All field control wiring that connects to the RTU OPEN must be routed through the raceway built into the corner post of the unit or secured to the unit control box with electrical conduit The unit raceway provides the UL required clearance between high and low voltage wiring Pass the control wires through the hole provided in the corner post then feed the wires thorough the raceway to the RTU
82. ters Trained service personnel should perform all other operations When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Follow all safety codes Wear safety glasses and work gloves Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions attached to the unit Consult local building codes and National Electrical Code NEC for special requirements Recognize safety information This is the safety alert symbol A When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies a hazard which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation A WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Disconnect all power to the unit before performing maintenance or service Uni
83. the functions of the RTU OPEN Occupancy Occupancy is the fundamental overall control of equipment The unit can be in one of two states Occupied or Unoccupied These are usually referred to as periods because they represent periods of any given day Before RTU OPEN can operate specific functions of the equipment it is installed on occupancy must be determined There are four different ways RTU OPEN can determine occupancy These are described below and selected by the configuration point Occupancy Source Always Occupied Default The unit will not determine occupancy and continuously run in the occupied state or period RTU OPEN ships from the factory with this setting to allow immediate operation BACnet Schedule When Occupancy Source is set to BACnet Schedule RTU OPEN will use a schedule to change occupancy based upon a day of week and a time period Local time and date should be set in the RTU OPEN for this function to operate properly This function applies if setting a local schedule in the RTU OPEN or if applying the unit to an I Vu Open network or an OPEN zoning system An OPEN network schedule can override a local schedule within the unit A space sensor push button override is only available when running a local or OPEN schedule The push button will override an unoccupied period to occupied for the specified time duration BAS On Off When Occupancy Source is set to BAS On Off RTU OPEN follows occupancy based on an
84. tion Temperature sat lo alarm Alert Generated Automatic for more then 5 minutes Setpoint Slider slidepot alarm Set Offset to zero Automatic S O Sensor ie open Tor more then 5 seconds Disable only wrong switch More then one discrete input is Switch Configuration di_cfg_alarm functions Configure correctly configured to provide the same function More then one analog input is Analog Input Disable 4 selectable analog Configuration ai cfg alarm inputs Configure correctly configured to provide the same function High Space Relative IRH is greater then the configura Humidity sprh hi alarm Alert Generated Automatic tion for more then 15 minutes Hd Relativ sprh_lo_alarm Alert Generated Automatic S ai T CO2 reading is above the config High CO2 co2 alarm Alert Generated Automatic uration for 1 minute Supply Fan Runtime sfan rntm alarm Alert Generated zero the timer Supply fan fun 0 user defined limit Compressor 1 Runtime comp1 rntm alar m Alert Generated zero the timer Compressor run time limit is ex ceeded Compressor 2 Runtime comp2 rntm alar m Alert Generated zero the timer Compressor run time limit is ex ceeded Filter filter alarm Alert Generated Automatic reset timer Dirty Filter supply fan run time ex ceeded filter switch configuration wrong Airside Linkage Alarm air linkage fail Alert Generated Automatic
85. ture Sensor Typical Wiring 33ZCT59SPT Rnet Communicating Sensor Wiring The Rnet bus allows local communication with the RTU OPEN including communicating sensors The Rnet bus can hold up to 6 devices in the following combinations wired in daisy chain or hybrid configuration 1 4 SPS sensor s SPPL SPP or SPPF sensor 1 4 SPS sensor s and 1 SPPL SPP or SPPF sensor Any of the above combinations plus up to 2 BACview s NOTE Additional SPS sensors and BACview must be addressed Use the jumpers on the SPS sensor s circuit board and refer to the BACview s installation instructions for addressing For Rnet wiring up to 500ft 152m use 18 AWG 4 conductor unshielded plenum rated cable The RTU OPEN s J13 RNET connection has a 4 pin Phoenix connector wired as described below Fig 6 shows sensor Rnet wiring RNET 1 Signal ground GND RNET 2 Signal Rnet RNET 3 Signal Rnet RNET 4 Power 12v CO Sensor s IAQ and OA The indoor air quality LAQ and outdoor air quality OAQ sensors monitor carbon dioxide CO2 levels This information is used to monitor the quality of air in terms of parts per million PPM The same sensor is used for inside outside and duct monitoring except an aspirator box is required for outside and duct mounting The CO2 sensor is preset for a range of 0 to 2000 ppm and a linear mA output of 4 to 20 The rooftop unit may have a factory installed
86. ve Active Number of Providers link_collector 4602 XX Occupancy Status link occ Unoccupied Occupied Space Temperature link spt XXX F Occupied Cooling Setpoint link_occ_cl_stpt 55 80 F Occupied Heating Setpoint link_occ_ht_stpt 55 80 F Unoccupied Cooling Setpoint link_unocc_cl_stpt 75 130 F Unoccupied Heating Setpoint link_unocc_ht_stpt 55 85 F Indoor Air CO2 ppm link_iaq xxxx ppm Space Relative Humidity link_sprh Xxx 96 29 Configuration Menus APPENDIX A USER INTERFACE MENUS CON T BACview MENU POINT NAME RANGE DEFAULT FIELD ASSISTANT MENU HOME Select function below Properties Equipment CONFIG CONFIGURATION Configuration SETPOINT SETPOINTS Setpoints Occupied Heating Setpoint occ_ht_stpt 40 90 F 70 Occupied Cooling Setpoint occ_cl_stpt 55 99 F 74 Unoccupied Heating Setpoint unocc_ht_stpt 40 90 F 55 Unoccupied Cooling Setpoint unocc_cl_stpt 55 99 F 90 Effective Cool Setpoint eff_cl_stpt XX F Effective Heat Setpoint eff_ht_stpt XX F Optimal Start optm_start 0 4 hr 4 Occ Relative Humidity Setpoint occ dehum stpt O0 unocc set 60 point rh Unocc Relative Humidity Set unocc de 30 100 rh 95 point hum stpt DCV Max Ctrl Setpoint iaq stpt max 0 9999 ppm 650 Power Exhaust Setpoint pexh stpt 20 90 Open 50 Sched Weekly schedule MON SUN none BACview Only Exceptions none ALARMS ALARM CONFIGURATION Alarm Configuration SPACE TEMPERATURE ALARM Occupied Alarm Hysteresis occ spt
87. ver to the 4 20 mA Out terminal on the return air enthalpy sensor Connect the 24 36 VDC Out terminal on the enthalpy switch receiver to the 24 36 VDC In terminal on the return air enthalpy sensor See Fig 10 Fire Shutdown The fire shutdown input is provided for unit shutdown in response to a fire alarm or smoke detector The fire shutdown input is dedicated to input 5 and tells the RTU OPEN when to shutdown due to smoke detection or fire alarm system The normal condition for fire shutdown is there is no fire alarm The unit may have factory installed smoke detector s refer to the base unit installation instructions for details on any adjustments required during unit installation Fire shutdown is always factory configured for a normally open smoke detector For field installation of a smoke detector see instructions for that specific accessory See below and the troubleshooting section for wiring at the unit s Low Voltage Terminal Board LVTB LVTB UNIT SHUTDOWN 24v OUT 24 VAC source LVTB UNIT SHUTDOWN Smoke Alarm Signal input to RTU OPEN NOTE Input 5 can also be wired into J5 3 Filter Status The filter status accessory is a field installed accessory This accessory detects plugged filters When installing this accessory the unit must have a free input input 3 5 8 or 9 One of the dedicated functions Humidistat Fire shutdown Enthalpy or Compressor safety must not be in use to configure Filter Statu
88. y sprh hi alarm Normal Alarm Low Space Relative Humidity Sprh lo alarm Normal Alarm High CO2 co2 alarm Normal Alarm Supply Fan Runtime sfan rntm alarm Normal Alarm Compressor 1 Runtime comp1 rntm alarm Normal Alarm Compressor 2 Runtime comp2 rntm alarm Normal Alarm Filter filter alarm Clean Dirty Airside Linkage Alarm air linkage fail Normal Alarm Alarm Module Event History 100 most recent BACview only Active Alarms Active Faults Returned To Normal RTN Manually Cleared CLR Buffer Buffer Buffer Buffer 35 IN ALPHABETICAL ORDER APPENDIX B THIRD PARTY POINTS LIST BACnet Modbus N2 LON Works Point Name ae BACnet Point OBJECT Register Register Nek Meee SNVT Type SNVT Name ite Name ID Type Type Address Active Compressor R float SNVT_count_inc nvo Stages comp_run AV 2020 value 40031 ADF 10 9 CompStages R float SNVT count inc nvoHeat Active Heat Stages heat run AV 2003 value 40033 ADF 11 9 Stages Airside Linkage R air_link Alarm age_fail BV 7030 Analog Input Config R uration ai cfg alarm BV 7026 un R W signed SNVT_count_inc BAS On Off keypad_ovrde MSV 1001 int 40133 ADI 1 9 nviBASOnOff Compressor 1 Relay R State comp_1 BV 2005 Compressor 1 R Runtime comp1_rntm AV 2017 Compressor 1 R comp1_rntm_ Runtime alarm BV 7014 Compressor 1 Ser R W

Carrier 48TF004-007 Air Conditioner User Manual

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