Carrier 50HC Series Service And Maintenance Instructions

Also see for 50HC Series: Installation instructions Installation instructions

8NOTE: The Remote VFD Keypad is a field--installedoption. It is not included as part of the Factory installedVFD option.See “Variable Frequency Drive (VFD) Installation, Setupand Troubleshooting Supplement” for wiring schematicsand performance charts and configuration.See Figs 10, 11 and 12 for locations of the VariableFrequency Drive (VFD) as mounted on the various 50HCmodels.VARIABLEFREQUENCYDRIVE (VFD)C11528Fig. 10 -- VFD Location for size 08--09VARIABLEFREQUENCYDRIVE (VFD)C11529Fig. 11 -- VFD Location for size 12VARIABLEFREQUENCYDRIVE (VFD)C11530Fig. 12 -- VFD Location for size 14ADDITIONAL VARIABLE FREQUENCYDRIVE (VFD) INSTALLATION ANDTROUBLESHOOTINGAdditional installation, wiring and troubleshootinginformation for the Variable Frequency Drive can befound in the following manuals: “Variable FrequencyDrive (VFD) Installation, Setup and TroubleshootingSupplement.”MOTORWhen replacing the motor, use the following steps. SeeFig. 13.BLOWER PULLEYV-BELTMOTOR PULLEYMOTORMOTOR MOUNTINGBRACKET BOLTS (4)MOTOR MOUNTINGBRACKET (2)JACK BOLT JAM NUT (2)JACK BOLT (2)C12034Fig. 13 -- Replacing Belt Driven MotorReplacing the MotorUse the following steps to replace the belt--driven motor.1. Turn off all electrical power to the unit. Use approvedlockout/tagout procedures on all electrical powersources.2. Remove cover on motor connection box.3. Disconnect all electrical leads to the motor.4. Loosen the two jack bolt jamnuts on the motormounting bracket.5. Turn two jack bolts counterclockwise until motorassembly moves closer to blower pulley.6. Remove V--belt from blower pulley and motor pulley.EQUIPMENT DAMAGE HAZARDFailure to follow this CAUTION can result inpremature wear and damage to equipment.Do not use a screwdriver or a pry bar to place the newV--belt in the pulley groove. This can cause stress onthe V--belt and the pulley resulting in premature wearon the V--belt and damage to the pulley.CAUTION!7. Loosen the four mounting bracket bolts and lockwashers.8. Remove four bolts, four flat washers, four lockwashers and four nuts attaching the motor mounting50HC