Carrier 50EZ-A Installation Instructions Manual

Also see for COMFORT 50EZ-A30: Owner's information manual Owner's information manual Product data Installation instructions

ELECTRICALSHOCKHAZARDFailuretofollowthiswarningcouldresultinpersonalinjuryordeath.Disconnectandtagelectricalpowertotheunitbeforecleaningandlubricatingtheblowermotorandwheel.Tocleanthe blower motor and wheel:1. Remove and disassemble blower assembly as follows:a. Remove blower access panel (see Fig. 20).b. Disconnect 5 pin plug and 4 pin plug from indoorblower motor. Remove capacitor if required.c. On all units remove blower assembly from unit.Remove screws securing blower to blower partition andslide assembly out. Be careful not to tear insulation inblower compartment.d. Ensure proper reassembly by marking blower wheel andmotor in relation to blower housing before disassembly.e. Loosen setscrew(s) that secures wheel to motor shaft,remove screws that secure motor mount brackets tohousing, and slide motor and motor mount out ofhousing.2. Remove and clean blower wheel as follows:a. Ensure proper reassembly by marking wheel orientation.b. Lift wheel from housing. When handling and/orcleaning blower wheel, be sure not to disturb balanceweights (clips) on blower wheel vanes.c. Remove caked-on dirt from wheel and housing with abrush. Remove lint and/or dirt accumulations fromwheel and housing with vacuum cleaner, using softbrush attachment. Remove grease and oil with mildsolvent.d. Reassemble wheel into housing.e. Reassemble motor into housing. Be sure setscrews aretightened on motor shaft flats and not on round part ofshaft. Reinstall blower into unit. Reinstall capacitor ifrequired.f. Connect 5 pin plug and 4 pin plug to indoor blowermotor.g. Reinstall blower access panel (see Fig. 20).3. Restore electrical power to unit. Start unit and check forproper blower rotation and motor speeds during coolingcycles.Step 2 1 Outdoor Coil, Indoor Coil, andCondensate Drain PanInspect the condenser coil, evaporator coil, and condensate drainpan at least once each year.The coils are easily cleaned when dry; therefore, inspect and cleanthe coils either before or after each cooling season. Remove allobstructions, including weeds and shrubs, that interfere with theairflow through the condenser coil.Straighten bent fins with a fin comb. If coated with dirt or lint,clean the coils with a vacuum cleaner, using the soft brushattachment. Be careful not to bend the fins. If coated with oil orgrease, clean the coils with a mild detergent-and-water solution.Rinse coils with clear water, using a garden hose. Be careful not tosplash water on motors, insulation, wiring, or air filter(s). For bestresults, spray condenser coil fins from inside to outside the unit. Onunits with an outer and inner condenser coil, be sure to cleanbetween the coils. Be sure to flush all dirt and debris from the unitbase.Inspect the drain pan and condensate drain line when inspectingthe coils. Clean the drain pan and condensate drain by removing allforeign matter from the pan. Flush the pan and drain trough withclear water. Do not splash water on the insulation, motor, wiring, orair filter(s). If the drain trough is restricted, clear it with a plumberssnake or similar probe device.Step 3 1 Outdoor FanKeep the condenser fan free from all obstructions to ensureproper cooling operation. Never place articles on top of theunit. Damage to unit may result.1. Remove 6 screws holding outdoor grille and motor to topcover.2. Turn motor/grille assembly upside down on top cover toexpose fan blade.3. Inspect the fan blades for cracks or bends.4. If fan needs to be removed, loosen setscrew and slide fan offmotor shaft.5. When replacing fan blade, position blade back to same posi-tion as before.6. Ensure that setscrew engages the flat area on the motor shaftwhen tightening.7. Replace grille.25