Carrier Performance 25HPA6 Installation Instructions Manual

Also see for 25HPA6: Wiring diagram

Contents

6NOTE: Operation of unit on improper line voltage constitutesabuse and could affect unit reliability. See unit rating plate. Do notinstall unit in system where voltage may fluctuate above or belowpermissible limits.NOTE: Use copper wire only between disconnect switch and unit.NOTE: Install branch circuit disconnect of adequate size per NECto handle unit starting current. Locate disconnect within sight fromand readily accessible from unit, per Section 440--14 of NEC.Route Ground and Power WiresRemove access panel to gain access to unit wiring. Extend wiresfrom disconnect through power wiring hole provided and into unitcontrol box.! WARNINGELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.The unit cabinet must have an uninterrupted or unbrokenground to minimize personal injury if an electrical faultshould occur. The ground may consist of electrical wire ormetal conduit when installed in accordance with existingelectrical codes.Connect Ground and Power WiresConnect ground wire to ground connection in control box forsafety. Connect power wiring to contactor as shown in Fig. 5.DISCONNECTPER N. E. C. AND/ORLOCAL CODESCONTACTORGROUNDLUGFIELD GROUNDWIRINGFIELD POWERWIRINGA91056Fig. 5 -- Line Power ConnectionsConnect Control WiringRoute low voltage control wires through control wiring grommetand connect leads to control board.Connect to Infinity connections ABCD only when Infinity UserInterface is available.Standard non--communicating thermostat connections are possiblewhen you connect to standard thermostat connections R, C, W, Y1,Y2, and O. Refer to wiring label for further clarification.General InformationUse No. 18 AWG color--coded, insulated (35°C minimum) wire forall installations.All wiring must be NEC Class 1 and must be separated fromincoming power leads.Use furnace transformer, fan coil transformer, or accessorytransformer for control power, 24v/40va minimum. The outdoorunit requires a minimum of 27va/24vac control power.Final Wiring CheckIMPORTANT: Check factory wiring and field wire connectionsto ensure terminations are secured properly. Check wire routing toensure wires are not in contact with tubing, sheet metal, etc.Compressor Crankcase HeaterFurnish power to crankcase heater a minimum of 24 hr beforestarting unit. To furnish power to heater only, set thermostat toOFF and close electrical disconnect to outdoor unit.Airflow Selections (ECM Furnaces)The ECM Furnaces provide blower operation to match thecapacities of the compressor during high and low stage coolingoperation. Tap selections on the furnace control board enable theinstalling technician to select the proper airflows for each stage ofcooling. Below is a brief summary of the furnace airflowconfigurations1. The Y2 call for high stage cooling energizes the “Cool” tapon the control board. The grey wire from cool tap is connec-ted to tap 5 on the motor. Refer to the furnace Product Datato find the corresponding airflow. If the airflow setting forhigh cooling needs to be switched from tap 5 to a differenttap, jumper a connection from the cool tap to the desired tapso that the Y2 signal is communicated via the cool tap to thedesired speed tap.2. The Y1 call for low stage cooling energizes the “Fan” tapon the control board. The red wire from the fan tap is con-nected to tap 1 on the motor. Refer to the furnace ProductData to find the corresponding airflow. If the airflow settingfor low cooling needs to be switched from tap 1 to a differ-ent tap, jumper a connection from the Fan tap to the desiredtap so that the Y1 signal is communicated via the Fan tap tothe desired speed tap. The Y1 setting will also govern thecontinuous fan airflow for the furnace.Refer to the furnace literature for further details.Airflow Selection for Variable Speed Furnaces(non--communicating)The variable speed furnaces provide blower operation to match thecapacities of the compressor during high and low stage coolingoperation. The furnace control board allows the installingtechnician to select the proper airflows for each stage of cooling.Below is a summary of required adjustments. See furnaceinstallation instructions for more details:1. Turn SW1----5 ON for 400 CFM/ton airflow or OFF for 350CFM/ton airflow. Factory default is OFF.2. The A/C DIP switch setting determines airflow during highstage cooling operation. Select the A/C DIP switch settingcorresponding to the available airflow shown in the furnaceInstallation Instructions that most closely matches the re-quired airflow shown in the air conditioning Product Datafor HIGH speed.3. The CF DIP switch setting determines airflow during lowstage cooling operation. Select the CF DIP switch settingcorresponding to the available airflow shown in the furnaceinstallation instructions that most closely matches the re-quired airflow shown in the air conditioning Product Datafor LOW speed. If a higher or lower continuous fan speed isdesired, the continuous fan speed can be changed using thefan switch on the thermostat. Refer to the furnace Installa-tion Instructions for details of how to use this feature.25HPA6