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ZoneINSTALLATION & WIRINGZoneE-BUS Controller to Two Condenser Head Pressure II Module WiringVCM-X Modular E-BUS, VCM-X WSHPE-BUS or SA E-BUS Controller to TwoCondenser Head Pressure II ModuleWiringAny E-BUS Module can be connected to the E-BUS Controller’s E-BUSport or can be daisy-chained together using HSSC cables.NOTE: Contact Factory for the correct HSSC cable length foryour application. Cables are available in ¼, ½, 1, 2, 3,4, and 5 Meter lengths and 100 and 150 Foot lengths.Up to (2) Two Condenser Head Pressure II Modules can be daisy-chainedtogether and connected to the E-BUS Controller using a modular HSSCcable. The Two Condenser Head Pressure II Module requires a 24 VACpower connection with an appropriate VA rating. See Figure 4 belowfor wiring.HVAC UNIT CONNECTIONNOTE: ALL RELAY OUTPUTSARE NORMALLY OPEN ANDRATED FOR 24 VAC POWERONLY - 1 AMP MAXIMUM LOADCONDENSER A ENABLEREVERSING VALVE A ENABLECONDENSER B ENABLEREVERSING VALVE B ENABLEOE370-23-HP2C2Two Condenser Head Pressure II ModuleCondenserSignal AHead Pressure Transducers0 - 667 PSI(One Per Refrigerant Circuit)RDWHBK VSIGGNDRDWHBK VSIGGNDGNDR2R1COND. B ENABLER3R2REV. VLV. B ENABLER4RELAY COMMONRC 5VSIG 2Two Condenser Head Pressure II ModuleOrion No.:OE370-23-HP2C2GND 5VSIG 3GND 5VSIG 4GNDBIN 1BIN 2HEADPRESSURETRANSDUCER #1A2 5VSIG 2GNDHEADPRESSURETRANSDUCER #2HEADPRESSURETRANSDUCER #3LED NAMECOMCondenserSignal B RELAYSCOMANALOGAO1Condenser Fan AECM MotorAO2GNDDuty CyclePWM1-BLUE 24 OUTSTATLED NAMEB2HEADPRESSURETRANSDUCER #4BIN 1BIN 2BIN 3COMCOND. A ENABLE INPUTREV. VLV. ENABLE INPUTCOND. B ENABLE INPUTCOMMONE-BUSConnectorRcPWM1 5VSIG 4GNDWattMaster Label#LB102110-ARev.: 1AR4 24 VoltsBLINKS QTY. OF SENSORS INSTALLEDBIN 3ADDRESSR3YELLOWLED BLINK CODESB1 5VSIG 3GNDAO1AO2GNDPWM1PWM1 PWM2PWM2 COND. A SIGNALCOND. B SIGNALGNDCOND. FAN ACOND. FAN ACOND. FAN BCOND. FAN BA1 5VSIG 1GNDAAON No.:V20660R1R2R3R4COMMALARMNO PROBLEMS0NO SENSORS DETECTED1HIGH HEAD PRESSURE DETECTED2LOW HEAD PRESSURE DETECTED3E-BUSConnectorYELLOWBLUE 24 OUTPWM2PWM2 Condenser Fan BECM MotorOPTIONSSet ADDRESS Dip Switch 1 to ON forWater Cooled or to OFF for Air Cooled.Currently showing OFF for Air Cooled.Set ADDRESS Dip Switch 2 to OFFon all communicating applicationsunless it is intended to be the SecondHead Pressure Module on a system. Ifset to ON, it will not communicate.Currently showing OFF.REV. VLV. A ENABLEGND VSIGGNDwww.aaon.comSIG 1 24 VACRDWHBK 5VDuty Cycle 24 VoltsALARMSTATCOMMOPTIONS Dip Switch Setting Not RequiredWhen Connected ToVCM-X E-BUS Controlleror SA E-BUS ControllerPWRGNDSet ADDRESS Dip Switch 3 to ON todisable Circuit B alarms when only oneCondenser is Used. Currently showingOFF.24 VAC VSIGGNDRELAY CONTACTRATING IS 1 AMPMAX @ 24 VACRDWHBK COMR1COND. A ENABLESet ADDRESS Dip Switch 4 to OFF tomake reversing valve "ON to Heat /OFF to Cool.” Set to ON to makereversing valve “ON to Cool / OFF toHeat.” Currently showing OFF.Line Voltage24 VAC Transformer3 VA Minimum.Connect To OtherWattMaster-ApprovedE-BUS Expansion Module(s)HSSC CableHSSC CableConnect To VCM-X E-BUSController or SA E-BUS ControllerWARNING!! Observe Polarity! All boardsmust be wired with GND-to-GND and 24VAC-to-24 VAC.Failure to observe polarity could result indamage to the boards.Figure 4: VCM-X E-BUS Controller to Two Condenser Head Pressure II Module Wiring Diagram6Two Condenser Head Pressure II Module Technical Guide

INSTALLATION & WIRINGE-BUS Controller to Two Condenser Head Pressure II Module WiringWARNING:Be sure all controllers and modules arepowered down before connecting ordisconnecting HSSC cables.For Stand Alone Applications,Connect To System Manager. For NetworkApplications Connect To Next ControllerAnd/Or MiniLink PD On Local Loop.Note:All Relay Outputs Are Normally Open AndRated For 24 VAC Power Only.1 Amp Maximum Load.OE332-23E-VCMX-MODVCM-X ModularE-BUS ControllerLocal LoopRS-4859600 BaudRS-485 COMMUNICATION LOOP. WIRE“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”R - 24VACRELAY CONTACTRATING IS 1 AMPMAX @ 24 VACG - Fan ON/OFF OnlyRELAYCOMMONAll Comm Loop Wiring IsStraight ThruT to T, R to R & SHLD to SHLDFANRELAY 2RELAY 3RELAY 4RELAY 5Relay Output ContactsR2 Through R5 May Be User-ConfiguredFor The Following:1 - Heating Stages2 - Cooling Stages3 - Warm-up Mode Command (VAV Boxes)4 - Reversing Valve (Air To Air Heat Pumps)5 - Reheat Control (Dehumidification)6 - Exhaust Fan Interlock7 - Preheater For Low Ambient Protection8 - Alarm9 - Override10 - Occupied11 - OA Damper12 - Heat Wheel13 - Emergency HeatNote: 1.) When Using the HP2C Module,All Compressors Will Be Wired From theProtection Module, Not the VCM-X Controller.Note: A Total Of 20 Relays Are Available ByAdding Relay Expansion Modules. AllExpansion Module Relay Outputs Are UserConfigurable As Listed Above.AAON No.:V07150VCM-X MODULAR E-BUS CONTROLLEROrion No.:OE332-23E-VCMX-MOD-AAI1 SPC (SPACE TEMPERATURE SENSOR)AI2 SAT (SUPPLY AIR TEMPERATURE SENSOR)AI3 RAT (RETURN AIR TEMPERATURE SENSOR)AI4 OAT (OUTDOOR AIR TEMPERATURE SENSOR)AI5 SUCTION PRESSURE SENSOR (FROM EXP. MODULE)AI7 SPACE TEMPERATURE SENSOR SLIDE ADJUSTOR VOLTAGE RESET SOURCEA01 ECONOMIZER (2-10 VDC OUTPUT)A02 SUPPLY FAN VFD (0-10 VDC OUTPUT)HSSC Cable Connect ToVCM-X E-BUS PortE-BUSCONNECTORANALOG INPUTJUMPERSETTINGSAI1 SETSee IndividualComponent WiringDiagrams ForDetailed Wiring OfAnalog Inputs AndLED BLINK CODESSTATUS1STATUS2NORMAL OPERATIONLED NAME01SAT FAIL1OAT FAIL2SPC FAIL32MODULE ALARM42AI2 ERM4-20mA0-10V0-5VTHERM4-20mA0-10V0-5VPUSH BUTTON OVR15AI7ZONE OVR25OUTPUT FORCE ACTIVE062MECH COOL FAIL13MECH HEAT FAIL23FAN PROOF FAIL33DIRTY FILTER43EMERGENCY SHUTDOWN53LOW SAT14HIGH SAT24CONT. TEMP COOL FAIL34CONT. TEMP HEAT FAILAI3 SETANALOG INPUT JUMPER SETTINGSMUST BE SET AS SHOWN FORPROPER OPERATIONSTATICPRESSURE2WattMaster Label#LB102073-01-ARev.: 1A44GNDLine Voltage24 VAC POWER ONLYWARNING! POLARITY MUST BE OBSERVEDOR THE CONTROLLER WILL BE DAMAGED2ICEXPANSION24VAC2IC DIGITALSENSORAI4 SETSize Transformer For CorrectTotal Load.VCM-X Controller 8 VAJumpersAI5 SETSplice If RequiredConnect To Digital Room Sensor And/OrDigital CO2 SensorAI7 SETConnect ToExpansion Module(s)(When Used)OE271Static PressureTransducerWarning:24 VAC Must Be Connected So That All GroundWires Remain Common. Failure To Do So WillResult In Damage To The Controllers.Connect FRP Tubing To High PressurePort (Bottom Tube) and Route To StaticPressure Pickup Probe Located In UnitDischarge. Leave Port Marked “Lo” OpenTo AtmosphereFigure 4, cont.: VCM-X E-BUS Controller to Two Condenser Head Pressure Module II Wiring DiagramTwo Condenser Head Pressure II Module Technical Guide7

SEQUENCE OF OPERATIONStand-Alone Input CommandsZoneZoneGeneralStand-Alone Input CommandsThe following inputs and outputs are available on the Two CondenserHead Pressure II Module. See Table 1 below to reference the Input/Output Map.Condenser Fan A On/OffBinary Inputs1Condenser Fan A On/Off (24 VAC Wet Input)2Reversing Valve On/Off (24 VAC Wet Input)3Condenser Fan B On/Off (24 VAC Wet Input)Binary Outputs1Condenser A Enable Relay(Dry Contact Output Rated for 24 VAC)2Reversing Valve A Enable(Dry Contact Output Rated for 24 VAC)3Condenser B Enable Relay(Dry Contact Output Rated for 24 VAC)4Reversing Valve B Enable(Dry Contact Output Rated for 24 VAC)Analog Inputs1Head Pressure #1 (0-667 PSI Sensor)2Head Pressure #2 (0-667 PSI Sensor)3Head Pressure #3 (0-667 PSI Sensor)4Head Pressure #4 (0-667 PSI Sensor)A 24 volt signal to Binary Input #1 initiates the Condenser Fan A Enablefunction. Typically, the source for this signal is the “Y” call from thethermostat calling for a compressor to run.Reversing Valve On/OffA 24 volt signal to Binary Input #2 indicates the reversing valve hasbeen energized and initiates the Reversing Valve Enable On indicationfunction. Typically, the source for this signal is the “O” call from athermostat or other controller.Condenser Fan B On/OffA 24 volt signal to Binary Input #3 initiates the Condenser Fan B Enablefunction. Typically, the source for this signal is the “Y” call from thethermostat calling for a compressor to run.Head Pressure SetpointThe Head Pressure Setpoint is set using the OPTIONS Dip Switches. SeeTable 2. The Default Setpoint for an Air Cooled Condenser is 340 for410-A refrigerant. The Default Setpoint for a Water Cooled Condenseris 235 for 410-A refrigerant. Set the OPTIONS Dip Switch to 0 if usingthese Default Settings. See “ADDRESS Dip Switch” below. You mustcycle power after setting Dip Switch values.NOTE: The only setpoint available for adjustment by the contractor is the Head Pressure Setpoint. The rest of thesetpoints described can only be changed by the factory.Analog Outputs (0-10 or 2-10 VDC)1Condenser Signal A (AOUT 1)2Condenser Signal B (AOUT 2)PWM Inputs1ECM 142 PWM Input (0-100% Duty Cycle)2ECM 142 PWM Input (0-100% Duty Cycle)ADDRESS Dip Switch Settings for CondenserType SelectionWhen using the OPTIONS Dip Switch to set the Head Pressure Setpoint,you must also set the ADDRESS Dip Switch to designate the type ofcondenser you are using.Set ADDRESS Dip Switch 1 to ON for a Water Cooled Condenser orto OFF for an Air Cooled Condenser.Table 1: Two Condenser Head Pressure II ModuleInputs & OutputsIf set to ON for a Water Cooled Condenser, the Analog Condenser OutputSignal will be 2-10 VDC for the Water Valve. If set to OFF for an AirCooled Condenser, the Analog Condenser Output Signal will be 0-10VDC for the Condenser Fan.You must cycle power after setting Dip Switch values. See Figure3 or 4 for ADDRESS Dip Switch location and Table 3 for Settinginformation.8Two Condenser Head Pressure II Module Technical Guide

SEQUENCE OF OPERATIONVCM-X Input Commands and Modes of OperationInput Commands (VCM-X Connection)Modes of OperationCondenser A & B On/OffOFF ModeInstead of a hard wired input signal to the Condenser Enable input,the VCM-X Modular Controller, VCM-X WSHP Controller, or SAController communicates to the Module via E-BUS communications.This signal indicates the compressor(s) are called to run and drives thecondenser A & B On/Off function.The Head Pressure Control Board is in the OFF Mode when the Condenser Input Signals are “OFF.” In this mode, all relays are off, theAnalog Output is 0 VDC, and the PWM Output is 0% Duty Cycle.Reversing Valve Enable A & B On/OffIf the Head Pressure Controller has been configured for the ReversingValve to be energized in the Cooling Mode and to Fail to the Heat Mode(Dipswitch 4 is set ON), then the Head Pressure Controller will be inthe Cooling Mode when one or both of the Condenser Signal inputs is“ON” and the Reversing Valve Enable Signal is “ON”. In this circumstance, the Reversing Valve Enable Relay Output(s) will energize forindication purposes.As with the Condenser Signal On/Off function, the VCM-X ModularController, VCM-X WSHP Controller, or SA Controller communicatesto the Module via E-BUS communications and signals that the reversingvalve has been energized and that heating has been enabled.NOTE: When the term “ON” is used, it means there is either 24VAC on the appropriate Binary Input or a call-to-runsignal is being received from a VCM-X series or SAseries controller. When the term “OFF” is used, it meansthere is either 0 VAC on the appropriate Binary Input orthe call-to-run signal from a VCM-X series or SA seriescontroller has been removed.Sensor Reading RoutineThe Two Condenser Head Pressure Module is used on units with twophysically separate condenser sections. Up to (2) Head Pressure Sensorscan be monitored in each section. The highest of the two readings ineach section will be used to control the condenser fan(s) in that section.Air from the condenser fan(s) in each section flows through both condenser coils. As a result, if you modulate the fan(s) based on the highestreading, you will have enough air flow for both coils.The highest reading of Head Pressure Sensors 1 & 2 controls CondenserFan A. The highest reading of Head Pressure Sensors 3 & 4 controlsCondenser Fan B.Cooling ModeIf the Head Pressure Controller has been configured for the ReversingValve to be energized in the Heating Mode and to Fail to the Cool Mode(Dipswitch 4 is set OFF), then the Head Pressure Controller will be inthe Cooling Mode when one or both of the Condenser Signal inputs is“ON” and the Reversing Valve Enable Signal is “OFF”.The Condenser Enable Relays will energize to enable the CondenserFans or Water Valves. In a water system, the Water Flow Valve willstart at 75% for 3 minutes. The Condenser Output Signals will thenautomatically adjust between 0 and 100% to maintain the desired HeadPressure Setpoint. The Condenser Output Signals can be a 0-10 VDC,2-10 VDC or 0-100% PWM signal provided by the appropriate output.Both outputs mirror each other.Heating ModeIf the Head Pressure Controller has been configured for the ReversingValve to be energized in the Cooling Mode and to Fail to the Heat Mode(Dipswitch 4 is set ON), then the Head Pressure Controller will be inthe Heating Mode when one or both of the Condenser Signal inputs is“ON” and the Reversing Valve Enable Signal is “OFF”.If the Head Pressure Controller has been configured for the ReversingValve to be energized in the Heating Mode and to Fail to the Cool Mode(Dipswitch 4 is set OFF), then the Head Pressure Controller will be inthe Cooling Mode when one or both of the Condenser Signal inputs is“ON” and the Reversing Valve Enable Signal is “ON”. In this circumstance, the Reversing Valve Enable Relay Output(s) will energize forindication purposes.In this mode, the Condenser Output Signals will go to 100% and remainthere until it leaves the Heating Mode.NOTE: The Reversing Valve Dipswitch 4 setting determineswhether the Reversing Valve Dipswitch 4 Relay is ONto Heat / OFF to Cool or ON to Cool / OFF to Heat.NOTE: The Reversing Valve Enable outputs are for indicationonly and are not wired to anything.Two Condenser Head Pressure II Module Technical Guide9

ZoneSEQUENCE OF OPERATIONZoneOPTIONS Dip Switch SettingsOPTIONS DipSwitch SettingsHead Pressure SetpointAir Cooled CondenserWater Cooled CondenserBinary ValueR410-AR410-A0340 (DEFAULT)235 03301439034015400350Table 2: OPTIONS Dip Switch/Head Pressure Setpoint Settings for Stand-Alone OperationADDRESS Dip Switch 1 SettingsSwitch 1Default SPDescription of Default Head Pressure SetpointOFF340Air Cooled Condenser using R410-A RefrigerantON235Water Cooled Condenser using R410-A RefrigerantSwitch 1 determines Air or Water Cooled CondenserNOTE: You must cycle power after setting Dip Switch values.Table 3: ADDRESS Dip Switch 1 Condenser Type Settings10Two Condenser Head Pressure II Module Technical Guide

SEQUENCE OF OPERATIONOPTIONS Dip Switch SettingsADDRESS Dip Switch 2 SettingsSwitch 2DescriptionOFFSet to OFF if Using only (1) Head Pressure Moduleor if this is Module 1 when Using (2) Head PressureModules.ONSet to ON if this is Module 2 when Using (2) HeadPressure Modules.Table 4: ADDRESS Dip Switch 2 Address Settings When in Communicating ModeADDRESS Dip Switch 3 SettingsSwitch 3DescriptionOFFEnable Circuit B AlarmONDisable Circuit B Alarm when only one condenser isused.Table 5: ADDRESS Dip Switch 3 SettingsADDRESS Dip Switch 4 SettingsSwitch 4DescriptionOFF

wattmaster label #lb102110-a rev.: 1a e-bus connector e-bus connector 5v sig 1 gnd 5v sig 2 gnd 5v sig 3 gnd 5v sig 4 gnd gnd c bin 1 bin 2 bin 3 com head pressure transducer #1 head pressure transducer #2 head pressure transducer #3 head pressure transducer #4 rev. vlv. enable input common pwm2 aaon no.: v20660 ao1 ao2 gnd cond. a enable .