AAON Orion VCCX2 Technical Manual Download Page 1

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VCCX2 Controller

Technical Guide

VCCX2 Controller Code: DT003800-001/SS1088 Version 1.02 and up

Service Tool SD Code: DT001240-001/SS1063 Version 1.11 and up

System Manager SD Code: DT002150-001/SS1068 Version 1.11 and up

System Manager Touch Screen (Limited Access): DT004254-001/SS7013

Summary of Contents for Orion VCCX2

Page 1: ...ontroller Code DT003800 001 SS1088 Version 1 02 and up Service Tool SD Code DT001240 001 SS1063 Version 1 11 and up System Manager SD Code DT002150 001 SS1068 Version 1 11 and up System Manager Touch Screen Limited Access DT004254 001 SS7013 ...

Page 2: ...Cnet points to latest VCCX2 software updated Appendix A figures various cosmetic updates Rev S November 24 2021 Added information regarding Paragon Air Flow Edited BACnet table Corrected errata Updated formatting AAON Inc 2425 South Yukon Ave Tulsa OK 74107 2728 www aaon com Factory Technical Support Phone 918 382 6450 Controls Support Phone 866 918 1100 All rights reserved November 2021 AAON Inc ...

Page 3: ...rn Air Temperature Sensor 32 Building Pressure Sensor 33 Remote Supply Air Temperature Reset 34 E BUS Outdoor Air Temperature Sensor 35 E BUS Outdoor Air Temperature and Humidity Sensor 36 E BUS Return Air Temperature and Humidity Sensor 37 Duct Static Pressure Transducer 38 Supply Fan VFD or Bypass Damper Actuator 39 Economizer Damper Actuator or Waterside Economizer Actuator 40 Modulating Heatin...

Page 4: ...Reheat Coil Suction and Return Air Bypass Damper Control 75 Heating Mode 76 Ventilation Mode Remote Contact Control and Space Sensor Operation 77 Indoor Air Quality and Morning Mode Operations 78 Single Zone Variable Air Volume 79 Supply Air Temperature Airflow Monitoring and Preheater Operation 80 Low Ambient Operation Heat Wheel and Duct Static Pressure Control 81 Duct Static Setpoint Reset Buil...

Page 5: ...e Sensor Testing 102 APPENDIX A SYSTEM CONFIGURATION 103 System Configurations 103 Stand Alone System Layout 104 Networked System Single Loop Layout 105 Networked System Multiple Loop Layout 106 APPENDIX B VCCX2 LCD SCREENS 107 Navigation Keys 107 Main Screens Map 108 Setting Screens 109 Status Screens 110 Alarm Screens 111 Output Override Screens 112 Air Balance Screens 113 APPENDIX C VCCX2 BACNE...

Page 6: ...ring 37 Figure 19 Static Pressure Transducer Wiring 38 Figure 20 Supply Fan VFD Wiring 39 Figure 21 Economizer Damper Actuator or Waterside Economizer Actuator Wiring 40 Figure 22 Modulating Heating Device Wiring 41 Figure 23 Building Pressure Control Output Wiring 42 Figure 24 Entering Water Temperature Sensor Return Air Plenum Pressure and Return Exhaust Proof of Flow 43 Figure 25 Entering Water...

Page 7: ...X2 Module Wiring 63 Figure 45 Operator Interfaces 64 Figure 46 VCCX2 Controller LED Locations 100 Figure 47 VCC X EM1 Expansion Module LED Locations 100 Figure 48 Typical Stand Alone System Layout 104 Figure 49 Typical Networked Single Loop System Layout 105 Figure 50 Typical Networked Multiple Loop System Layout 106 Figure 51 LCD Display and Navigation Keys 107 Figure 52 VCCX2 BACnet Connection t...

Page 8: ...SMZ Module Comp Status Trend Log 95 Table 10 RSMZ Module RSM Alarm Trend Log 95 Table 11 RSMZ Module VFD Status Trend Log 96 Table 12 RSMZ Module VFD Alarm 1 Trend Log 96 Table 13 RSMZ Module VFD Alarm 2 Trend Log 96 Table 14 VCCX2 Trend Log Bit Strings 98 Table 15 0 5V Temperature Sensor Voltage and Resistance for Type III Sensors 101 Table 16 Duct Static Pressure Voltage for Duct Static Pressure...

Page 9: ...heating output hot water valve steam valve SCR electric heat control Full integration with the AAON RSMs Full integration with the AAON MODGAS X Module Full integration with the AAON MHGRV X Module Full integration with the AAON PREHEAT X Module Advanced dehumidification capabilities Air to air heat pump and water source heat pump applications Airflow monitoring of outdoor air supply air return ai...

Page 10: ...e VAV operation requires the use of modulating heating or cooling sources Space Temperature Control of High Percentage Outdoor Air Units This application allows the unit to be configured to use the space temperature to initiate Cooling and Heating Modes on units that are high percentage outdoor air or 100 outdoor air units Before entering Vent Mode the VCCX2 will first determine if the outdoor air...

Page 11: ...and RH OE217 02 OE217 03 ASM01819 ASM01820 E BUS Digital Room Sensor No LCD Temp and RH OE217 04 ASM02221 E BUS Horizontal Outdoor Air Temperature and RH Sensor OE265 15 ASM01836 E BUS Vertical Outdoor Air Temperature and RH Sensor OE265 16 ASM01838 E BUS Return Air Temperature and RH Sensor OE265 17 ASM01840 E BUS CO2 Return Air Sensor Emulator Board OE365 07 EBSE ASM01623 E BUS CO2 Space Sensor ...

Page 12: ... on the size of the system There are two E BUS expansion ports which allow for the use of communicating sensors and E BUS modules The RSMV HP provides six analog inputs four binary inputs four relays and two analog outputs It connects with an E BUS cable to the VCCX2 Controller Pages 21 53 54 ASM02201 Refrigerant System Module for Digital Compressors The Refrigerant System Module for Digital Compr...

Page 13: ...esigned to control one set of reheat valves The Reheat Expansion Module connects to the MHGRV X via an E BUS communication cable Connected together the Reheat Expansion Modules provide a system that allows the proper control of multiple sets of valves N A ASM01688 ASM01689 PREHEAT X and PREHEAT X EXT Modules The PREHEAT X and PREHEAT X EXT are designed to control fixed stages of Preheat or optiona...

Page 14: ...ength Cable sold separately Page 28 ASM01831 E BUS CO2 Duct Mounted Sensor with Remote Pickup Tube Used with the VCCX2 Controller for duct mounted CO2 sensing applications Connects to the VCCX2 Controller with an E BUS cable of required length Includes Duct Mounted CO2 Sensor Integral Aspiration Box Airflow Pickup Tube and 10 ft E BUS cable 4 3 2 1 3M Page 29 ASM01836 E BUS Horizontal Outdoor Air ...

Page 15: ...embly The E BUS CABLE SPOOL is bulk E BUS cable that can be used with the E BUS Bulk Connectors Pages 25 63 G018890 E BUS Bulk Connectors Attaches to E BUS Spool Cable Must be crimped using either the G034180 E BUS Crimp Tool or one matching the requirements listed in the pricing list Includes E BUS Bulk Connector N A G034180 E BUS Crimp Tool Crimps the E BUS Connectors for use with the E BUS Spoo...

Page 16: ...attaching the System Manager to a standard handy box Includes Modular System Manager SD with 4 GB SD card and 12 ft pigtail cable assembly STATUS SETPOINTS SCHEDULES OVERRIDES ALARMS 7 8 0 DEC MINUS 9 4 5 6 1 2 3 ENTER ESC CLLAR DOWN UP PREV NEXT See the VCCX2 Controller Operator Interfaces SD Technical Guide ASM01874 CommLink 5 Communications Interface The CommLink 5 connects to the control syste...

Page 17: ...l installations Page 64 ASM01878 E BUS Adapter Board The E BUS Adapter Board is used for connecting the EBTRON GreenTrol or Paragon Airflow Measurement Digital Transmitter to the VCCX2 Controller It connects with an E BUS cable to the VCCX2 Controller Cable supplied separately Page 50 G033970 E BUS Adapter Hub The E BUS Adapter Hub is used for connecting E BUS devices and controllers together with...

Page 18: ...wiring instructions N A ASM01868 GPC XP Controller The GPC XP Controller is used for controlling equipment or processes that cannot be controlled using a standard HVAC controller Prism 2 computer front end software is used to interface with the GPC XP Controller functions The GPC XP Controller provides the flexibility to control schedule and or monitor equipment such as unit heaters exhaust fans m...

Page 19: ...19 VCCX2 Controller Technical Guide Figure 1 VCCX2 Controller Components OVERVIEW VCCX2 Controller Components ...

Page 20: ...20 VCCX2 Controller Technical Guide Figure 2 VCCX2 Controller Dimensions DIMENSIONS VCCX2 Controller 4 10 0 70 7 95 8 38 0 213 2 75 6 04 Note All Dimensions are in inches Note Depth is 1 50 inches ...

Page 21: ...POWER ONLY WARNING POLARITY MUST BE OBSERVED OR THE CONTROLLER WILL BE DAMAGED NOT USED 5 V 5 V COIL TEMP 1 COMP STATUS 1 SP HP COIL TEMP 2 COMP STATUS 2 GND GND NOT USED NOT USED GND TEMP 3 GND COIL TEMP SENSORS BINARY INPUTS E BUS RSM FOR VFD COMPRESSORS www aaon com SUCTION PRESSURE SENSOR HEAD PRESSURE SENSOR E BUS EXPANSION VALVE 1 EXPANSION VALVE 2 WHITE BLACK RED GREEN WHITE BLACK RED GREEN...

Page 22: ...R61 R57 R56 R54 R53 R49 R48 R46 R45 Q6 D21 D20 D19 D17 C24 2 1 Rc R35 R31 R29 R24 D13 D11 D10 D9 PWM R9 AOUT1 AOUT2 AOUT3 AOUT4 5621 OFF 1002 1002 1002 1002 1002 1002 47 4992 1002 1004 1002 1002 1004 1002 300 300 10uF 10uF 10uF 10uF 10uF 10uF 01uF 10uF 300 1002 1002 3650 R4 1002 R5 1002 J1 C26 OPTIONS R2 47 47 1001 1001 3650 3650 3650 5621 5621 5621 5621 YS102482 REV1 5 63 5 00 2 67 0 62 2 05 4 10...

Page 23: ...LY10 RLY11 RLY12 RLY COM MADE IN USA RLY COM RLY COM RLY1 RLY2 RLY3 RLY4 RLY8 RLY7 RLY6 RLY5 24VAC GND EXPANSION BOARD YS102324 REV 2 RELAY 1002 1002 1002 1002 1002 1002 OFF 1uF 1000pF 5 00 0 20 5 63 6 06 2 76 5 52 2 05 0 71 4 10 Note All Dimensions are in inches Note Depth is 1 50 inches Figure 5 12 Relay E BUS Module Dimensions DIMENSIONS 12 Relay E BUS Module ...

Page 24: ...Table 1 Voltage and Environment Requirements WARNING When using a single transformer to power multiple controllers or expansion modules the correct polarity must always be maintained between the boards Failure to observe correct polarity will result in damage to the controller and expansion modules Please carefully read and apply the following information when wiring the VCCX2 Controller RSMs and ...

Page 25: ...mote Forced Heating Remote Forced Dehumidification Emergency Shutdown Switch Supply Air Temp Sensor Mount in HVAC unit supply air stream Space Temperature Sensor GND AUX TEMP Return Air Temp Sensor Mount in HVAC unit return air stream Outdoor Air Temperature Sensor Building Static Pressure Sensor Plastic tubing to building pressure sensing locations Remote Supply Air Temperature Reset Signal confi...

Page 26: ...troller Technical Guide Note All Relay Outputs are normally open and rated for 24 VAC power only 1 amp maximum load Waterside Economizer Valve Figure 7 VCCX2 Controller Output Wiring WIRING VCCX2 Controller Outputs ...

Page 27: ...E BUS cable It can also be daisy chained with a CO2 sensor for applications requiring both a wall mounted CO2 sensor and one of the three Digital Room Temperature Sensors The E BUS Digital Room Sensor should be mounted on the wall in an area that does not have drafts or is exposed to direct sunlight See Figure 8 this page for wiring details NOTE If using multiple E BUS sensors or modules the E BUS...

Page 28: ...perature Sensor It should be mounted on the wall in an area that does not have drafts or is exposed to direct sunlight See Figure 9 this page for wiring details and installation notes A Duct Mounted E BUS CO2 Sensor can be used if desired instead of the Wall Mounted E BUS CO2 Sensor See Figure 10 page 29 for Duct Mounted E BUS CO2 Sensor wiring details NOTE If using multiple E BUS sensors or modul...

Page 29: ...te pickup tube The Duct Mounted E BUS CO2 Sensor with Remote PickupTube is designed to be mounted in the return air duct of the HVAC unit and uses its integral aspiration box to sample the CO2 level in the duct See Figure 10 this page for wiring and installation details NOTE If using multiple E BUS sensors or modules the E BUS hub or adapter board may be required Note The Duct Mounted E BUS CO Sen...

Page 30: ... space that is to be controlled The Space Temperature Sensor is available as a sensor only sensor with override button sensor with slide adjust and sensor with slide adjust and override configurations A space temperature signal can be connected to Analog Input 1 AI1 for applications requiring a Space Temperature Setpoint See Figure 11 this page for complete Space Temperature Sensor wiring details ...

Page 31: ...mperature Sensor is a 10K Type III Thermistor Sensor The Supply Air Temperature Sensor should be mounted in the unit discharge plenum or in the supply air duct A supply air temperature signal can be connected to AI3 for applications requiring a Supply Air Temperature Setpoint See Figure 12 this page for details Figure 12 Supply Air Temperature Sensor Wiring WIRING Supply Air Temperature Sensor ...

Page 32: ... The Return Air Temperature Sensor should be mounted in the return air duct If the system has a zoning bypass damper installed be sure the return air sensor is located upstream of the bypass duct connection A return air temperature signal can be connected to AI4 for applications requiring a Return Air Temperature Setpoint See Figure 13 this page for details Figure 13 Return Air Temperature Sensor ...

Page 33: ...the terminal labeled EXC Connect the GND side of the 24 VAC power source to the terminal labeled COM Connect the remaining terminal labeled OUT to AI5 on the VCCX2 Controller WARNING It is very important to be certain that all wiring is correct as shown in the wiring diagram below Failure to observe the correct polarity will result in damage to the VCCX2 Controller or Building Pressure Sensor Figu...

Page 34: ...Reset Signal A remote supply air temperature reset signal can be connected to AI6 for applications requiring remote reset of the Supply Air Temperature Setpoint See Figure 15 this page Figure 15 Remote SAT Reset Signal Wiring WIRING Remote Supply Air Temperature Reset ...

Page 35: ...ns involving outdoor air humidity the vertical or horizontal E BUS Outside Air and Humidity Sensor must be used instead See Figure 17 page 36 for details CAUTION Be sure to mount the sensor in the upright position in an area that is not exposed to direct sunlight and is protected from the elements The shaded area under the HVAC unit rain hood is normally a good location Unused conduit opening s mu...

Page 36: ...r in the upright position in an area that is not exposed to direct sunlight and is protected from the elements The shaded area under the HVAC unit rain hood is normally a good location Unused conduit opening s must have closure plugs installed and must be coated with sealing compound to provide a rain tight seal Water can damage the sensor NOTE If using multiple E BUS sensors or modules the E BUS ...

Page 37: ...ing 50 ft E BUS cable provided Note Connect the sensor to the VCCX2 Controller using the provided E BUS cable WIRING E BUS Return Air Temperature and Humidity Sensor CAUTION Be sure to mount the sensor in the upright position in an area that is not exposed to direct sunlight and is protected from the elements The shaded area under the HVAC unit rain hood is normally a good location Unused conduit ...

Page 38: ...e supply fan VFD zone damper actuator or bypass damper actuator If the HVAC unit is configured for CAV operation this sensor is optional If it is installed on a CAV unit it will not affect operation but rather will be used as a status only reading See Figure 19 this page for detailed wiring CAUTION AAON strongly recommends using pneumatic tubing instead of relocating the sensor Extending the wires...

Page 39: ...fromAnalog Output 1 AO1 on the VCCX2 Controller This signal output can be connected to either The Supply Fan VFD to modulate the supply fan speed A Bypass Damper for zoning applications See Figure 20 this page for detailed wiring CAUTION VFD units can cause large transient noise spikes which can cause interference to be propagated on other electronic equipment Use shielded wire wherever possible a...

Page 40: ...his page for detailed wiring WARNING It is important to be certain that all wiring is correct as shown in the wiring diagram below Failure to observe the correct polarity will result in damage to the actuator or VCCX2 Controller Waterside Economizer Valve The waterside economizer valve must be wired as shown in Figure 21 this page for proper operation The waterside economizer valve connects to AO2...

Page 41: ...lating steam valve or is used for SCR control of an electric heating coil See Figure 22 this page for detailed wiring of the Modulating Heating Device WARNING It is very important to be certain that all wiring is correct as shown in the wiring diagram below Failure to observe the correct polarity could result in damage to the Modulating Heating Device or the VCCX2 Controller 1 10 VDC Note If the m...

Page 42: ...lding pressure output The Building Static Pressure Sensor must be connected in order for the building pressure output to operate correctly CAUTION VFD units can cause large transient noise spikes that can cause interference to be propagated on other electronic equipment Use shielded wire wherever possible and route all sensor and controller wiring away from the VFD and the HVAC unit electrical wir...

Page 43: ...um Pressure Sensor also used as a Building Static Pressure Sensor as shown on page 33 must be wired as shown in Figure 24 this page There are three terminal connections on the pressure sensor Connect 24 VAC to the terminal labeled EXC Connect the GND terminal on the EM1 Expansion Module terminal block to the terminal labeled COM Connect the remaining terminal labeled OUT to SIG1 on the EM1 WARNING...

Page 44: ...uide Secure sensor element and thermal mastic strip to pipe with supplied wire tie Be sure to tighten wire tie snugly to ensure good thermal contact Figure 25 Entering Water Temperature Sensor WIRING Entering Water Temperature Sensor ...

Page 45: ...y for other manufacturer wiring instructions Economizer Damper Actuator Belimo Actuator shown Connect to Expansion Module s when used Exhaust Duct Static Pressure Sensor The ASM01640 Exhaust Duct Static Pressure Sensor plugs directly into the EM1 s static pressure port The Duct Static Pressure Sensor reading is used to determine current exhaust duct static pressure This static pressure reading is ...

Page 46: ... WARNING Observe polarity All boards must be wired with GND to GND and 24 VAC to 24 VAC Failure to observe polarity will result in damage to one or more of the boards Expansion modules must be wired in such a way that the expansion modules and the controller are always powered together Loss of power to the expansion module will cause the controller to become inoperative until power is restored to ...

Page 47: ...UT TERMINAL BLOCK VCC X E EXPANSION M1 AAON P N ASM01691 LABEL P N G040660 RC 2 Y1 3 COM 1 VCC X EM1 Expansion Module 18 30 VAC GND Line Voltage Chilled Water Valve Actuator VCC X E 1 Module 5 VA M correct total load Size transformer for Figure 28 Chilled Water Valve Actuator Wiring WARNING Observe polarity All boards must be wired with GND to GND and 24 VAC to 24 VAC Failure to observe polarity w...

Page 48: ...ards must be wired with GND to GND and 24 VAC to 24 VAC Failure to observe polarity will result in damage to one or more of the boards Expansion modules must be wired in such a way that the expansion modules and the controller are always powered together Loss of power to the expansion module will cause the controller to become inoperative until power is restored to the expansion module Figure 29 R...

Page 49: ...pplications WARNING Observe polarity All boards must be wired with GND to GND and 24 VAC to 24 VAC Failure to observe polarity will result in damage to one or more of the boards Expansion modules must be wired in such a way that the expansion modules and the controller are always powered together Loss of power to the expansion module will cause the controller to become inoperative until power is r...

Page 50: ...ll result in damage to one or more of the boards Figure 31 EBTRON GTC116 or HTN104 Series GreenTrol GA 200 N Series and Paragon MicroTransEQ Series Airflow Measurement Digital Transmitter Wiring WIRING EBTRON GreenTrol and Paragon Digital Transmitters NOTE Only the EBTRON GTC116 or HTN104 series GreenTrol GA 200 N Module with GF series Airflow Station or Paragon MicroTransEQ series of MODBUS RTU t...

Page 51: ... Modulates the compressors to satisfy the suction coil saturated temperature The Suction Coil Saturated Temperature Setpoint is reset by theVCCX2 Controller to maintain the supply air temperature during Cooling Mode During Dehumidification Mode it controls the compressors to the Suction Saturation Temperature Setpoint Modulates the condenser fan to maintain the Head Pressure Setpoint Modulates the...

Page 52: ...e RSMV can monitor a Head Pressure Transducer and control condenser fans to maintain a Head Pressure Setpoint The condenser fan will be controlled with a 0 10 VDC output signal Coil Temperature Sensors The Coil Temperature Sensors are used to measure coil temperature after each evaporator coil line This temperature combined with the calculated saturated refrigerant temperature is used to calculate...

Page 53: ...red as shown in Figure 34 this page It is required for all compressorized VCCX2 applications 18 30 VAC GND Line Voltage Size transformer for correct total load RSMV 18 VA RSMV HP BK RD WH BK RD WH COMP STAT 1 COMP STAT 2 Coil Temp 2 Sensor Coil Temp 3 Sensor Coil Temp 4 Sensor COM COM COIL TEMP SWITCH POF Suction Pressure Sensor Head Pressure Sensor Coil Temp 1 Sensor Leaving Water Temp Sensor Mod...

Page 54: ...emperature Sensor The Leaving Water Temperature Sensor is used to measure the leaving water temperature when used on a watersource heat pump unit CAUTION The Shraeder port used for installation of the Suction Pressure Transducer should be located in a vertical position of the suction line to prevent refrigerant oil from accumulating in the sensor NOTE If there are two compressors on a single circu...

Page 55: ...1 RSMD can monitor and control up to two compressors and condensers The compressors can be in either a tandem or non tandem configuration The module is designed for R410 A refrigerant The RSMD is connected to the VCCX2 Controller Up to four RSMD Modules can be connected depending on the size of the system There are two E BUS expansion ports which allow the use of communicating sensors and E BUS Mo...

Page 56: ...e Shraeder port used for installation of the Suction Pressure Transducer should be located in a vertical position of the suction line to prevent refrigerant oil from accumulating in the sensor NOTE If there are two compressors on a single circuit a tandemcircuit SuctionPressure2 HeadPressure2 and Condenser Signal 2 would not be used WIRING RSMD Outputs Head Pressure Control The Head PressureTransd...

Page 57: ... the Reheat Expansion Module or VFD Compressor See Important Wiring Considerations page 24 for power source requirements When wiring the RSMZ Module its relay outputs must be wired as wet contacts connected to 24 VAC See Figure 38 this page for input wiring WARNING Observe polarity All boards must be wired with GND to GND and 24 VAC to 24 VAC Failure to observe polarity will result in damage to on...

Page 58: ...ntroller Sensor to maintain the Superheat Setpoint of each evaporator coil Provides alarms and safeties for the compressor and condenser operation Provides a 2 x 8 LCD character display and four buttons that allow for status of system operation system setpoints system configurations sensors and alarms and to change the module s address if necessary See Figure 39 this page for output wiring ALARM U...

Page 59: ...ation status and alarm display This module must be configured to work with R410 A refrigerant and is configured for 667 psi liquid line pressure transducers See Important Wiring Considerations page 24 for power source requirements See Figure 40 this page for wiring WARNING Observe polarity All boards must be wired with GND to GND and 24 VAC to 24 VAC Failure to observe polarity will result in dama...

Page 60: ...nd Dehumidification Setpoint In addition up to seven ASM01687 Reheat Expansion Modules can be connected to the MHGRV X and to each other for additional reheat valve control The MHGRV X directly connects to the VCCX2 Controller or indirectly using an E BUS Expansion Board via an E BUS cable See Figure 41 this page NOTE If using multiple E BUS sensors or modules a E BUS hub or adapter board may be r...

Page 61: ...et High Limit Temperature Setpoint If the communication is interrupted between the MODGAS X and the VCCX2 Controller the MODGAS X will revert to stand alone operation For more information refer to the MODGAS X Technical Guide Supply Air Temperature Sensor Mount In Supply Air Duct Connect Supply Air Temperature Sensor to AI3 GND on VCCX2 Controller E BUS cable connects to VCCX2 Controller s Expansi...

Page 62: ...tage 3 Fixed Heat Stage 4 Proof of Ignition Signal 2 24 VAC Note 1 24 VAC must be connected so that all ground wires remain common 2 All wiring to be in accordance with local and national electrical codes and specifications Connect Supply Air Temperature sensor to AI3 and GND to VCCX2 Mount in supply air duct Supply Air Temperature Sensor The SAT OPTIONS jumper setting should be set to 1 Only one ...

Page 63: ...to VCCX2 Module Wiring PREHEAT X and PREHEAT X EXT Module Wiring The ASM01688 PREHEAT X and ASM01689 PREHEAT X EXT are designed to control fixed stages of preheat and optional modulating preheat to maintain a desired Preheat Leaving Air Temperature Setpoint The PREHEAT X is limited to a 35 F Leaving Air Temperature Setpoint The PREHEAT X EXT has an extended LeavingAir Temperature Setpoint minimum ...

Page 64: ...tor interface Four different operator interfaces are available for programming and monitoring of the VCCX2 Controller See Figure 45 this page They are as follows Modular Service Tool SD Modular System Manager SD PC with Prism 2 Software installed and CommLink 5 System Manager TS L Touch Screen LimitedAccess Any of these devices or a combination of them can be used to access the status configuratio...

Page 65: ... RLY2 3 Configurable Relay RLY3 4 Configurable Relay RLY4 5 Configurable Relay RLY5 6 Configurable Relay RLY6 7 Configurable Relay RLY7 8 Configurable Relay RLY8 Note The following E BUS sensors and modules are available to connect to the VCCX2 Controller via E BUS ports or E BUS Expansion Modules 1 E BUS Digital Room Sensor LCD Display Temp Only or Temp and Humidity 2 E BUS Digital Room Sensor No...

Page 66: ...ssure control can be accomplished by using one of two main control methods One control method uses the 0 10 VDC signal to control an exhaust fan VFD or an exhaust damper actuator for direct acting pressure control applications In addition for reverse acting pressure control applications it can control an outdoor air damper actuator or in certain cases the VFD supply fan The other available control...

Page 67: ... are optional This means the VCCX2 Controller must be configured to recognize these input signals VCCX2 Controller Outputs AO1 Main Supply Fan VFD Control Signal or Bypass Damper Control Signal This user adjustable voltage signal is used to modulate the supply fan VFD in VAV single zone VAV filter loading applications or reverse acting building pressure control using the VFD In a volume and variab...

Page 68: ...ected to this input AO1 Modulating Chilled Water Valve Actuator This output is used to control a modulating chilled water valve actuator to maintain the Cooling Supply Air Temperature Setpoint This output provides a 0 10 or 2 10 VDC direct acting signal AO2 Return Air Damper Actuator Signal This output signal is a direct acting 2 10 VDC output signal that is used to modulate a return air damper ac...

Page 69: ...above its Economizer Minimum Setpoint position or if the damper moves above a user adjustable position setpoint 13 Heat Wheel Configure 1 relay that turns heat wheel on when in occupied operation and turns heat wheel off when in Economizer Mode 14 Occupied Active If configured this relay will energize whenever the unit is in the Occupied Mode 15 Override Active If configured this relay will energi...

Page 70: ...figuration Options The VCCX2 Controller can be configured to have various HVAC source options that will determine the mode of operation Heating Cooling or Vent Mode of the unit The following are descriptions of those options Space Temperature Typical selection for CAV recirculating units Return Air Temperature Optional selection for CAV recirculating units Single Zone VAV Selected for a space temp...

Page 71: ...roller to only look for the remote forced occupied signal for occupied unoccupied commands Internal Week Schedule An internal week schedule which supports up to two start stop events per day and allows scheduling of up to 14 holiday periods per year is available for determining occupied and unoccupied schedules It also allows for daylight saving configuration Broadcast Schedule Eight external broa...

Page 72: ...tpoint minus the cooling stage control window and the Cooling will begin to stage off Each stage must meet its minimum run time adjustable before it is allowed to stage off Successive stages are subject to a cooling stage down delay adjustable See the appropriate RSM Technical Guide for a more detailed sequence of operation Staged Cooling without the Refrigerant System Modules An RSM will not be u...

Page 73: ... can be wired into the VCC X EM1 Expansion Module for status monitoring Several Title 24 alarm conditions can also be displayed Economizer Override Via BACnet As stated above the economizer must reach and remain at 100 before compressors will be allowed to stage on to meet the Cooling SupplyAir Setpoint Because of this 100 requirement if a value of less than 100 is written to BACnet point AV 70 Ou...

Page 74: ...Cooling Dehumidification Mode a Heating Dehumidification Mode or a Vent Dehumidification Mode Any calls for Unoccupied Dehumidification use the same Dehumidification Setpoint as during the Occupied Mode NOTE Do not use this option on a MUA unit that does not have return air and which is not configured for space controlled night setback operation Damage to the unit could occur since the outdoor air...

Page 75: ...ered When unit heat is used for reheat instead of hot gas reheat the VCCX2 can activate the heat source s discussed in the Heating Mode section to maintain the supply air temperature at the active Supply Air Temperature Setpoint When unit heat is used to supplement modulating hot gas reheat the modulating hot gas reheat signal must reach 100 before Heating will be enabled to add additional reheat ...

Page 76: ...stable The modulating heating signal is calculated by the differential between the supply air temperature and the active SupplyAir Temperature Setpoint based on the modulating heating proportional window The maximum signal adjustment per time period is 10 and is not user adjustable The minimum signal adjustment per time period is based on the modulating heating proportional window The larger the m...

Page 77: ...h the forced heating and forced cooling inputs are inactive or if both are simultaneously active then the unit is in Vent Mode state In this condition in the Occupied Mode only the fan would be on for ventilation In this condition in the Unoccupied Mode the unit would be off If forced dehumidification is also being used it will operate in conjunction with the forced heating and forced cooling inpu...

Page 78: ...air temperature rises above the target temperature or a user adjustable time period expires Warm Up Mode is not initiated by push button overrides or unoccupied heating demands The outdoor air damper remains closed during Warm Up Mode Once the Warm Up Mode has been terminated it cannot resume until the unit has been through a subsequent Unoccupied Mode Only one Warm Up Mode is allowed per Occupied...

Page 79: ...eed 100 default as needed to maintain the space temperature within the space heating reset window created by configuring a Space Heating High and a Space Heating Low Reset Source Setpoint If the unit needs to be configured for CAV heating set the minimum VFD heating speed to be the same as the maximum VFD heating speed desired during heating page 76 Once the unit enters the Heating Mode the supply...

Page 80: ...nit Airflow Monitoring Outdoor supply return and exhaust airflow can be monitored using the EBTRON GTC116 or HTN104 series Paragon MicroTransEQ or MTSE series or GreenTrol GA 200 N Module in conjunction with a GreenTrol GF series of airflow station ContactAAON Controls for information on other airflow station options The VCCX2 will control the outdoor air damper to maintain an Outdoor Air Cubic Fo...

Page 81: ...ng to a Duct Static Pressure Setpoint The static pressure control output signal can be used to control a supply fan VFD direct acting operation or a zoning or bypass damper actuator reverse acting operation The Duct Static Pressure Setpoint the setpoint deadband the static pressure control signal and the static control rate are all user adjustable The static control rate is the amount of time that...

Page 82: ... deadband amount Exhaust Fan VFD or Modulating Exhaust Damper If configured for modulating exhaust a user adjustable voltage output AO4 Building Pressure Output will be used to control this fan or damper An exhaust relay can be configured if necessary to enable the fan or damper Whenever the building pressure rises above the Building Pressure Setpoint by the deadband amount the exhaust fan relay w...

Page 83: ...ntroller can control an exhaust fan based off of exhaust duct static pressure This sequence will require the use of the VCC X EM1 Expansion Module which has a modular jack that the Duct Static Pressure Sensor will plug into The building pressure output will be used to control the exhaust fan for this operation A standard pull through exhaust fan creates negative duct static pressure Since a Duct S...

Page 84: ...izer operation is enabled and with mode control initiated by the SpaceTemperature and Humidity Sensors Space Temperature Control of High Percentage Outdoor Air Units This option allows for space temperature control of 100 outdoor air units or units with a high percentage of outdoor air normally 50 or greater For this application configure Space Temperature w High Percentage OA for the controlling ...

Page 85: ... Setpoint In this way the economizer will have time to close to its minimum position before the supply air temperature falls below the Heating Supply Air Setpoint and Heating is initiated During Morning Warm Up heating will be controlled to the Morning Warm Up Supply Air Setpoint In this operation if night setback operation will be initiated by a Space Sensor connected to the VCCX2 Controller then...

Page 86: ...daptive defrost timer value will be subtracted from the original defrost interval If the defrost cycle is terminated between the eighth and ninth minute the defrost interval will not be changed If the defrost cycle is terminated before the eighth minute this could be an indicator that the unit may need less defrost time To address this issue the adaptive defrost timer value will be inversely propo...

Page 87: ... the first stage of head pressure control when the compressors are active Modulating condenser fan control will be the second stage If the outdoor air temperature is below the Evaporative Modulating Condenser Low Ambient Setpoint the modulating condenser fan will be used as the first stage of head pressure control and the evaporative condenser pump relay will energize as the second stage If the he...

Page 88: ... open Unit Heating Mode The waterside economizer valve is closed while the bypass valve and condenser valves are open NOTE For waterside economizer bypass wiring please see the RSMD Technical Guide Waterside Economizer Flush Cycle If the economizer has been closed for 72 hours a flush cycle will be initiated the next time the compressor is activated or at the next 6 00AM time slot whichever happen...

Page 89: ...d RAT Sensor Bad OAT Sensor Bad Space Sensor Bad CO2 Sensor Missing Outdoor CFM Sensor Missing Exhaust CFM Sensor Missing Supply CFM Sensor Missing Return CFM Sensor Mechanical Cooling Failure Mechanical Heating Failure Fan Proving Alarm Dirty Filter Alarm Emergency Shutdown Relay Runtime No Economizer Feedback Title 24 Economizer Air Temperature Sensor Failure Title 24 Economizer Damper Failure T...

Page 90: ...r air reading will be artificially set to the half point between the Cooling and Heating Lockout Setpoints This will allow cooling and heating to continue operating If the OutdoorAirTemperature Sensor is the controlling sensor Mode Enable Sensor this alarm will also shut down the unit Return Air Sensor Failure Alarm This alarm is generated if the controller is configured to have a Return Air senso...

Page 91: ...g called to run all heating and cooling is disabled the outdoor air damper closes if it is not configured for outdoor temperature control or space control with high percentage outdoor air and a fan proving alarm is generated Fan proving needs to be configured for this alarm to occur There is a 30 second delay for this alarm Return Exhaust Fan Proving Alarm There are configuration options for retur...

Page 92: ... temp failure alarm When the space temperature drops below the Heating Mode Enable Setpoint minus the control Mode Low Alarm Offset Setpoint for 30 seconds the controller will generate a low control temp failure alarm Both offset setpoints are user adjustable Preheat Low Temperature This alarm indicates a leaving air temperature cutoff alarm condition which is activated if the controlling leaving ...

Page 93: ...xhaust Airflow CFM EXCFM kCFM Building Pressure BldPr WG Duct Static Pressure Static WG MHGRV Valve Position ReHeat MODGAS Valve Position ModGas Main Fan Speed VFD Signal FanVFD Economizer Position Econo Modulating Heat Signal ModHeat Building Pres Relief VFD Signal Relief Modulating Cooling Signal ModCool Sensor Alarms AlrmGrp1 Bit String Mechanical Alarms AlrmGrp2 Bit String Temp Limit and Sump ...

Page 94: ...temperature of Module 1 Compressor 1 while 3SucTmp2 refers to the suction saturation temperature of Module 3 Compressor 2 Several trend log items will use this pattern to identify the status of values related to certain modules and the compressors or condensers on those modules See Table 7 this page for RSMV RSMD trend logs and Table 6 this page for RSMZ trend logs RSMV RSMD MODULE TREND LOGS TYPI...

Page 95: ... MinRunPending 7 128 MinOffFlag 8 256 MinOffPending 9 512 StageUpConditionsMet 10 1024 StageDwnConditionsMet 11 2048 StageUpFlag 12 4096 StageDwnFlag 13 8192 CoilTempSatisfied RSMZ TREND LOG BIT STRINGS RSM ALARMS Item Bit Value Description 1RSMAlrms 2RSMAlrms 3RSMAlrms 4RSMAlrms 5RSMAlrms 6RSMAlrms 0 1 LowSuction 1 2 UnsafeSuction 2 4 TripHighDiscPSI_Comp1 3 8 Compressor1_NotRunning 4 16 Compress...

Page 96: ...us Trend Log RSMZ TREND LOG BIT STRINGS VFD ALARMS 1 Item Bit Value VFD Status Bit 0 1VFDAlrm1 2VFDAlrm1 4VFDAlrm1 5VFDAlrm1 0 1 Brake Check 1 2 Pwr Card Temp 2 4 Earth Fault 3 8 Ctrl Card Temp 4 16 Ctrl Word TO 5 32 Over Current 6 64 Torque Limit 7 128 Motor Th Over 8 256 Motor ETR Over 9 512 Inverter Overld 10 1024 DC under Volt 11 2048 DC over Volt 12 4096 Short Circuit 13 8192 Inrush Fault 14 ...

Page 97: ...inder of 2 6 4 2 subtract the next highest possible number which is 2 Dirty Filter The Dirty Filter binary input is also currently active 4 There is no remainder 2 2 0 so there are no more inputs that are active With this example from one value of 22 the formula above determined that three binary inputs were active when that trend item was recorded Example 2 With a value of 86 start with 64 Remote...

Page 98: ...e 24 Failure Mode D ExpRly 0 1 12 Relay Exp Relay 1 Configurable 11 2048 Title 24 Failure Mode E 1 2 12 Relay Exp Relay 2 Configurable Alarm Group 3 0 1 High Supply Air Temperature Cutoff 2 4 12 Relay Exp Relay 3 Configurable 1 2 Low Supply Air Temperature Cutoff 3 8 12 Relay Exp Relay 4 Configurable 2 4 High Control Temperature Alarm 4 16 12 Relay Exp Relay 5 Configurable 3 8 Low Control Temperat...

Page 99: ... COMM This yellow LED lights up and blinks continuously toindicate theVCCX2 Controlleris communicating BACnet This yellow LED lights up and blinks continuously to indicate BACnet communications Relay LEDs RLY1 This green LED lights up when the supply fan is enabled and will stay lit as long as the supply fan is active RLY2 RLY8 These green LEDs lights up when the relays are enabled and stays lit a...

Page 100: ...100 VCCX2 Controller Technical Guide Figure 46 VCCX2 Controller LED Locations Figure 47 VCC X EM1 Expansion Module LED Locations TROUBLESHOOTING VCCX2 Controller and EM1 LED Diagnostics ...

Page 101: ...1 2 746 135 57 2 3015 1 159 69 20 6 11906 2 717 140 60 2743 1 077 70 21 1 11652 2 691 145 62 7 2502 1 001 71 21 7 11379 2 661 150 65 6 2288 0 931 Space Supply Air Outdoor Air or Return Air Temperature Sensor Testing The following sensor voltage and resistance table is provided to aid in checking sensors that appear to be operating incorrectly Many system operating problems can be traced to incorre...

Page 102: ...4 17 2 40 2 17 5 00 4 25 2 50 2 25 Building Pressure Sensor Testing Instructions Use the voltage column Table 17 this page to check the Building Static Pressure Sensor while connected to a powered expansion module Read voltage with meter set on DC volts Place the minus lead on terminal labeled GND and the lead on terminal AI5 on the VCCX2 Controller BUILDING PRESSURE SENSOR Pressure Sensor W C Vol...

Page 103: ...onitored from one or more of the available operator interfaces connected on the communications loop Networked System For a networked single loop system a range of one to 59 VCCX2 Controllers sharing information connect the controllers together usingAAON communications wire or 18 gauge two conductor twisted pair with shield wire Belden 82760 or equivalent The networked single loop system requires e...

Page 104: ...104 VCCX2 Controller Technical Guide Figure 48 Typical Stand Alone System Layout APPENDIX A SYSTEM CONFIGURATION Stand Alone System Layout ...

Page 105: ...2 5V J3 R34 R16 R13 R8 R39 X2 R26 R17 R14 C24 U13 R49 R48 R47 R46 R45 R44 R43 R40 R37 R35 R32 R31 R29 R27 R24 R22 R12 R11 R10 R9 R7 R6 R5 R2 R1 L5 L4 D12 D11 D1 C51 C50 C45 C41 C39 C36 C20 C19 C18 C17 C16 C15 C14 C13 C12 C11 C10 C9 C8 C7 C6 C5 C4 C1 J1 R41 C23 C25 C26 R42 X3 R20 C27 C34 C40 U10 U11 C28 C29 R18 C35 D2 L1 R25 C31 R19 U9 R28 C32 R30 R33 C30 R15 Q2 R21 R23 SW1 C2 C3 V1 R36 1002 R S T ...

Page 106: ...C33 OFF T SH R 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1002 1uF 1uF 1uF 1uF 1002 1002 T SH R C24 COMM Line Voltage 18 30 VAC 15 VA Modular System Manager SD System Manager TS L Note The SMTS L Is An End User Interface Only It Cannot Be Used To Configure The Controllers Line Voltage System Manager TS L Back View 18 30 VAC 6 VA R S T BLACK R Con...

Page 107: ...ey to navigate through the Main Menu Screen categories ALARM UP DOWN ENTER MENU Editing Key Key Function UP or DOWN Use the UP or DOWN key to enter editing mode on a user adjustable screen Edit Mode is indicated by the underscore appearing on the screen NOTE Entering Edit Mode will also adjust the value up one UP key or down one DOWN key so the value may have to be readjusted ENTER Use the ENTER k...

Page 108: ...o scroll through the Alarms Press to scroll through the Output Override screens Press to go to Settings screen Press to go to the Status screen Press to go to the Alarms screen Press to go to the Air Balance screen AIR BALANCE Press to scroll through the Air Balance screens FACTTEST MODE Press to return to the first Main Menu screen Press to go to the Factory Test Mode screen NOTE This screen is f...

Page 109: ...T MAC ADDRESS Valid range is 0 to 127 Default is 1 The ENTER key moves the cursor between the digit fields starting with the ones field Once the cursor is under a field use the UP and DOWN arrow keys to select a number between 0 and 9 DEVICEID XXXXXXX BACnet CURRENT DEVICE ID A Device ID of up to 7 digits can be entered The ENTER key moves the cursor between the digit fields starting with the ones...

Page 110: ...ied FRC UNOC Force Unoccupied REM OCC Remote Occupied ZONE HEAT ZONE COOL ZONE OVR Zone Override HVAC MODE OFF MODE HVAC MODE This screen displays the current HVAC Mode Options are OFF MODE VENT MODE COOL MODE HEAT MODE VENT RH COOL RH HEAT RH WARMUP PURGE DEFROST COOLDOWN SPC TEMP XX X SPACE TEMPERATURE 40ºF to 200ºF or 5ºC to 93ºC SPC RH X X SPACE HUMIDITY 0 00 100 SAT TEMP XX X SUPPLY AIR TEMPE...

Page 111: ... alarm COOLING FAILURE Mechanical cooling failure alarm HEATING FAILURE Mechanical heating failure alarm FAN POF FAILURE Proof of flow interlock alarm DIRTY FILTER Dirty filter alarm EMERG SHUTDOWN Emergency shutdown alarm ECONO FAILURE Title 24 Economizer alarms HI SAT ALARM High supply temperature cutoff alarm LO SAT ALARM Low supply temperature cutoff alarm CONTROL TEMP HI High control temperat...

Page 112: ... increase and decrease the value Default is 1 0 AUTO MOD HEAT 1 0 VDC MODULATING HEATING 0 0 to 10 0 Active Force Mode Press the UP and DOWN buttons to increase and decrease the value Default is 1 0 AUTO EXHAUST 1 0 VDC EXHAUST FAN 0 0 to 10 0 Active Force Mode Press the UP and DOWN buttons to increase and decrease the value Default is 1 0 AUTO MOD COOL 1 0 VDC MODULATING COOLING 0 0 to 10 0 Activ...

Page 113: ...Press the UP and DOWN buttons to increase and decrease the value Default is 10 0 MIN FAN 0 0 VDC MINIMUM FAN VOLTAGE 0 0 to 10 0 VDC Press the UP and DOWN buttons to increase and decrease the value Default is 0 0 MAX EXH 10 0 VDC MAXIMUM EXHAUST VOLTAGE 0 0 to 10 0 VDC Press the UP and DOWN buttons to increase and decrease the value Default is 10 0 MIN EXH 10 0 VDC MINIMUM EXHAUST VOLTAGE 0 0 to 1...

Page 114: ...ir with shield Use Belden 82760 or equivalent 18 30 VAC GND Line Voltage Size Transformer For Correct Total Load VCCX2 Controller 15 VA VCCX2 CONTROLLER Programming Note Use Settings Menu in the LCD display to program the BACnet settings SH T R Typical Terminal Blocks All Wiring To Be R To R SH G To SH G T To T ALARM MENU DOWN ENTER UP Figure 52 VCCX2 BACnet Connection to MS TP Network APPENDIX C ...

Page 115: ...rent value of the Outdoor Air Temperature Sensor Outdoor Air Humidity AI 17 Current value of the Outdoor Humidity Sensor Outdoor Air Wetbulb AI 18 Current calculated outdoor wetbulb temperature BACnet Properties for the VCCX2 Controller Analog Inputs Parameter Object Description Limits Outdoor Air Dewpoint AI 19 Current calculated outdoor air dewpoint temperature Supply Air Setpoint Reset Voltage ...

Page 116: ...sor A2 superheat temperature heat pump A1 Expansion Valve Position AI 62 Current position of Compressor A1 Expansion Valve BACnet Properties for the VCCX2 Controller Analog Inputs Parameter Object Description Limits A2 Expansion Valve Position AI 63 Current position of Compressor A2 Expansion Valve Condenser A1 Expansion Valve Position AI 64 Current position of Condenser A1 Expansion Valve Condens...

Page 117: ...t Pump AI 107 Current compressor C2 suction line temperature heat pump C1 Superheat Temperature AI 108 Current compressor C1 superheat temperature BACnet Properties for the VCCX2 Controller Analog Inputs Parameter Object Description Limits C2 Superheat Temperature AI 109 Current compressor C2 superheat temperature Condenser C1 Superheat Heat Pump AI 110 Current compressor C1 superheat temperature ...

Page 118: ...1 VFD Comp Perc AI 152 Current RSMZ 1 VFD compressor percentage RSMZ 1 Discharge Pressure AI 153 Current RSMZ 1 discharge pressure RSMZ 1 Suction Pressure AI 154 Current RSMZ 1 suction pressure BACnet Properties for the VCCX2 Controller Analog Inputs Parameter Object Description Limits RSMZ 1 Suction Line Temp AI 155 Current RSMZ 1 suction line temperature RSMZ 1 Saturation Temp AI 156 Current RSM...

Page 119: ...osition 2 AI 195 Current RSMZ 3 EEV valve position 2 RSMZ 3 Warnings AI 196 Current RSMZ 3 warnings See RSMZ Warnings Bits on page 131 BACnet Properties for the VCCX2 Controller Analog Inputs Parameter Object Description Limits RSMZ 3 Discharge Line Temp AI 197 Current RSMZ 3 discharge line temperature RSMZ 3 Faults AI 198 Current RSMZ 3 faults See RSMZ Faults Bits on page 131 RSMZ 3 Lockouts AI 1...

Page 120: ... temperature RSMZ 6 Superheat AI 238 Current RSMZ 6 superheat temperature BACnet Properties for the VCCX2 Controller Analog Inputs Parameter Object Description Limits RSMZ 6 EEV Position AI 239 Current RSMZ 6 EEV Valve position RSMZ 6 Suction Pressure 2 AI 240 Current RSMZ 6 suction pressure 2 RSMZ 6 Suction Line Temp 2 AI 241 Current RSMZ 6 suction llne temperature 2 RSMZ 6 Saturation Temp 2 AI 2...

Page 121: ... pressure 3 reading SUB 2 Saturation 1 AI 271 Subcooling Module 2 saturation temperature 1 reading SUB 2 Saturation 2 AI 272 Subcooling Module 2 saturation temperature 2 reading SUB 2 Saturation 3 AI 273 Subcooling Module 2 saturation temperature 3 reading SUB 2 Line Temp 1 AI 274 Subcooling Module 2 liquid line temperature 1 reading SUB 2 Line Temp 2 AI 275 Subcooling Module 2 liquid line tempera...

Page 122: ... See AV 89 for Cool Down Target Temperature AV 16 If Morning Warm Up is configured then upon entering Occupied Mode the Warm Up Mode will be activated if the return air is below this temperature by one degree 50 F 10 C 90 F 32 2 C BACnet Properties for the VCCX2 Controller Analog Values Parameter Object Description Limits Low High Occupied Cooling Setpoint AV 1 If the control temperature rises one...

Page 123: ...ture falls below this setpoint 30 F 34 4 C 80 F 26 6 C Heat Wheel Defrost Enable Setpoint AV 28 The unit will go into Heat Wheel Defrost if the outdoor air is below this setpoint 0 F 17 7 C 50 F 10 C APPENDIX C VCCX2 BACnet VCCX2 BACnet Parameters Analog Values BACnet Properties for the VCCX2 Controller Analog Values Parameter Object Description Limits Low High PreHeat Enable Setpoint AV 29 If the...

Page 124: ...n this is the fan speed at which the VFD will start when Cooling is initiated In a VAV configuration this is the lowest fan speed allowed in the Cooling Mode In CAV and MUA configurations this should be set to 100 0 100 BACnet Properties for the VCCX2 Controller Analog Values Parameter Object Description Limits Low High Minimum Main Fan VFD in Heating Mode AV 46 In Single Zone VAV configuration th...

Page 125: ... 65 Superheat Setpoint 1 F 1 C 30 F 17 C Maximum Outdoor CFM Requirement AV 66 Maximum Outdoor Airflow CFM Setpoint in High CO2 0 10K 200K BACnet Properties for the VCCX2 Controller Analog Values Parameter Object Description Limits Low High Schedule Force AV 67 0 Auto uses controller s schedule 1 Forced Occupied 2 Forced Unoccupied 0 2 HVAC Mode Override AV 68 Overrides normal controller operation...

Page 126: ...WG 3 00 WG BACnet Properties for the VCCX2 Controller Analog Values Parameter Object Description Limits Low High Static Setpoint Reset Interval AV 88 The Reset Interval is how often the setpoint reset calculation occurs This must be an infrequent event so the default is 15 minutes 10 min 60 min Cool Down Target Temperature See AV 16 for Warm Up Target Temperature AV 89 If Morning Cool Down is conf...

Page 127: ...ant Module 1 BI 38 Refrigerant Module 1 is bad or missing Missing Refrigerant Module 2 BI 39 Refrigerant Module 2 is bad or missing Missing Refrigerant Module 3 BI 40 Refrigerant Module 3 is bad or missing Missing Refrigerant Module 4 BI 41 Refrigerant Module 4 is bad or missing BACnet Properties for the VCCX2 Controller Binary Inputs Parameter Object Description Cooling Enabled Status BI 1 Status...

Page 128: ...rent status of Configurable Relay 7 on 12 Relay Board 12 Relay Expansion Board Relay 8 BI 67 Current status of Configurable Relay 8 on 12 Relay Board 12 Relay Expansion Board Relay 9 BI 68 Current status of Configurable Relay 9 on 12 Relay Board BACnet Properties for the VCCX2 Controller Binary Inputs Parameter Object Description 12 Relay Expansion Board Relay 10 BI 69 Current status of Configurab...

Page 129: ... C1 Compressor Enable BI 101 Current status of enable signal to Compressor C1 C2 Compressor Enable BI 102 Current status of enable signal to Compressor C2 C1 Compressor Alarms BI 103 Indicates an RSM alarm is present on the C1 circuit C2 Compressor Alarms BI 104 Indicates an RSM alarm is present on the C2 circuit C1 2 Defrost Switch BI 105 Outside coil C1 C2 temp switch for Defrost Mode C1 2 Water...

Page 130: ...ent 5 Single Zone VAV 6 VccxControlStatusBits ENUMERATED Unoccupied 0 Occupied 1 Override Mode 2 Holiday Unoccupied 3 Holiday Occupied 4 Forced Occupied 5 Forced Unoccupied 6 Remote Contact Occupied 7 Reserved 8 Reserved 9 Reserved 10 OA Damper Calibration 11 VccxHVACModeStatusBits ENUMERATED Off 0 Vent Mode 1 Cooling Mode 2 Heating Mode 3 Vent RH Mode 4 Cooling RH Mode 5 Heating RH Mode 6 Warm Up...

Page 131: ...harge Pressure Comp 2 10 High Superheat 11 High Evap Temperature 12 Emergency Shutdown 13 RSMZLockoutsStatusBits ENUMERATED Suction Pressure System Lockout 0 Oil Boost Lockout 1 High Discharge Pressure System Lockout 2 Low Superheat System Lockout 3 High Superheat System Lockout 4 High Evap Temperature System Lockout 5 High Discharge Temp System Lockout 6 RSMZAlarms1StatusBits ENUMERATED Brake Che...

Page 132: ... RSMZDriveStatusBits ENUMERATED Control_Ready 0 Control Not Ready 1 Control Ready 0 Drive_Ready 0 Drive Not Ready 1 Drive Ready 1 Enable 0 Coasting 1 Enable 2 Trip_Error 0 No Error 1 Trip 3 ErrorNoTrip 0 No Error 1 Error no trip 4 Reserved 5 Triplock_Error 0 No Error 1 TripLock must power cycle 6 Warning 0 No Warning 1 Warning 7 SpeedEqualsReference 0 Speed Reference 1 Speed Reference 8 BusControl...

Page 133: ...andardized Device Profile L 4 BACnet Application Specific Controller B ASC Standard Object Types Supported Analog Input Optional properties supported Description Analog Value Optional properties supported Description Binary Input Optional properties supported Description Inactive_Text Active_Text Binary Value Optional properties supported Description Inactive_Text Active_Text Device Object Optiona...

Page 134: ... techsupport aaon com NOTE Before calling Technical Support please have the model and serial number of the unit available PARTS For replacement parts please contact your local AAON Representative 2425 So Yukon Ave Tulsa OK 74107 2728 Ph 918 583 2266 Fax 918 583 6094 AAON P N G039840 Rev S Created in the USA November 2021 AAON All Rights Reserved VCCX2 Controller Technical Guide G039840 Rev S 21112...

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