York H5CE150A50 Installation Manual
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292424-XIM-A-0307Unitary Products Group 15CONDENSER FAN OPERATIONThese condensing units are factory equipped with a fancycling switch to regulate system head pressure. When out-door ambient conditions are cool, the head pressure of anyair conditioning system may drop too low for optimal perfor-mance. These condensing units maximize system perfor-mance in a variety of ambient conditions by incorporating afan cycling switch to maintain proper system head pressure.On these condensing units, the condenser fans are poweredwhen compressor one is energized. Fan one will start imme-diately upon a call for first stage cooling. However, fan two isequipped with a fan cycling switch and will not start until thesystem head pressure reaches 320 psig. Condenser fan twowill operate until the system head pressure drops below 180psig where the fan cycling switch will shut the fan down. Theunit will continue to operate condenser fan one until the sys-tem head pressure reaches 320 psig at which time condenserfan two will restart.SAFETY FEATURES1. The compressor is protected against over current andexcessive temperature as described in the Sequence ofOperation.2. The compressor is equipped with a crankcase heater todiscourage refrigerant migration into the compressorsump during the OFF cycle.3. The condenser fan motors have auto-reset internal pro-tection.4. The secondary of every transformer is grounded.5. Every unit is protected by high and low-pressure con-trols.SECURE OWNER'S APPROVALWhen the system is functioning properly, secure the owner'sapproval. Show him the location of all disconnect switchesand the thermostat. Teach him how to start and stop the unitand how to adjust temperature settings within the limitationsof the system.MAINTENANCECLEANING CONDENSER SURFACEDirt should not be allowed to accumulate on the condensercoils or other parts in the condenser air circuit. Clean as oftenas necessary with a brush, vacuum cleaner attachment orother suitable means.LUBRICATIONThe fan motors for these condensing units are equipped withfactory lubricated and sealed ball bearings. They do notrequire any maintenance.COMPRESSOR REPLACEMENTContact the local UPG Distribution Center for compressor orparts. |
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