Carrier PHD4 Series Installation Instruction

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PHD4 Series K and WPH4 Series K: Installation InstructionManufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.27MaintenanceTo ensure continuing high performance, and to minimize the possibilityof premature equipment failure, periodic maintenance must beperformed on this equipment. This heat pump unit should be inspected atleast once each year by a qualified service person. To troubleshoot unit,refer to Table 9.NOTE: TO EQUIPMENT OWNER: Consult your local dealer about theavailability of a maintenance contract.The minimum maintenance requirements for this equipment are asfollows:1. Inspect air filter(s) each month. Clean or replace when necessary.2. Inspect indoor coil, drain pan, and condensate drain each coolingseason for cleanliness. Clean when necessary.3. Inspect blower motor and wheel for cleanliness each coolingseason. Clean when necessary.4. Check electrical connections for tightness and controls for properoperation each cooling season. Service when necessary.Step 1 – Air FilterIMPORTANT: Never operate the unit without a suitable air filter in thereturn-air duct system. Always replace the filter with the samedimensional size and type as originally installed. See Table 1 forrecommended filter sizes.Inspect air filter(s) at least once each month and replace(throwaway-type) or clean (cleanable-type) at least twice during eachcooling season and twice during the heating season, or whenever thefilter becomes clogged with dust and lint.Indoor Blower and MotorNOTE: All motors are pre-lubricated. Do not attempt to lubricate thesemotors.NOTE: 460 volt units have a stepdown autotransformer that suppliesapproximately 230 volts to a nominal 230 volt indoor blower motor.For longer life, operating economy, and continuing efficiency, cleanaccumulated dirt and grease from the blower wheel and motor annually.To clean the blower motor and wheel:1. Remove and disassemble blower assembly as follows:a. Remove blower access panel (see Fig. 25).b. Disconnect 5 pin plug and 4 pin plug from indoor blower motor.Remove capacitor if required.c. On all units remove blower assembly from unit. Remove screwssecuring blower to blower partition and slide assembly out. Becareful not to tear insulation in blower compartment.d. Ensure proper reassembly by marking blower wheel and motor inrelation to blower housing before disassembly.e. Loosen setscrew(s) that secures wheel to motor shaft, removescrews that secure motor mount brackets to housing, and slidemotor and motor mount out of housing.2. Remove and clean blower wheel as follows:a. Ensure proper reassembly by marking wheel orientation.b. Lift wheel from housing. When handling and/or cleaning blowerwheel, be sure not to disturb balance weights (clips) on blowerwheel vanes.c. Remove caked-on dirt from wheel and housing with a brush.Remove lint and/or dirt accumulations from wheel and housingwith vacuum cleaner, using soft brush attachment. Removegrease and oil with mild solvent.d. Reassemble wheel into housing.e. Reassemble motor into housing. Be sure setscrews are tightenedon motor shaft flats and not on round part of shaft. Reinstallblower into unit. Reinstall capacitor.f. Connect 5 pin plug and 4 pin plug to indoor blower motor.g. Reinstall blower access panel (see Fig. 25).3. Restore electrical power to unit. Start unit and check for properblower rotation and motor speeds during cooling cycles.WARNING!PERSONAL INJURY AND UNIT DAMAGE HAZARDFailure to follow this warning could result in personal injury or deathand unit component damage.The ability to properly perform maintenance on this equipment requirescertain expertise, mechanical skills, tools and equipment. If you do notpossess these, do not attempt to perform any maintenance on thisequipment, other than those procedures recommended in the Owner’sManual.WARNING!ELECTRICAL SHOCK HAZARDFailure to follow these warnings could result in personal injury ordeath:1. Turn off electrical power to the unit and install a lockout tagbefore performing any maintenance or service on this unit.2. Use extreme caution when removing panels and parts.3. Never place anything combustible either on or in contact with theunit.CAUTION!UNIT OPERATION HAZARDFailure to follow this caution may result in improper operation.Errors made when reconnecting wires may cause improper anddangerous operation. Label all wires prior to disconnecting whenservicing.WARNING!ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injury or death.Disconnect and tag electrical power to the unit before cleaning theblower motor and wheel.