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ROOFTOP PACKAGED DX UNITS <br />ANNUAL SERVICING <br />Check all Operating Pressures <br />1. Suction pressure. <br />2. Discharge pressure. <br />3. Oil pressure. <br />Check all Operating AMPS <br />1. <br />Compressor motor. <br />2. <br />Evaporator fan motor. <br />3. <br />Condenser fan motor. <br />4. <br />Return air motor. <br />Lubrication Svstem <br />1. Oil level. <br />2. Check oil for acid. <br />r- - <br />3. Lubrication of all bearings as required. <br />Refrigerant Circuit - <br />1. Refrigerant charge check. <br />2. Leak check system. <br />Safety Controls <br />1. High head pressure control. <br />2, Oil failure control, <br />Operating Controls <br />1. Check and adjust all operating controls as necessary. <br />Compressor Motor <br />1. Meg compressor motor. <br />2. Tighten terminals. <br />3. Check motor leads. <br />Condenser System <br />1. Check for heat transfer. <br />2. Check belts if required. <br />3. Check cooling tower as required. <br />Evaporator System <br />1. Check super heat. <br />2. Check condensate drainage. <br />Filter System <br />1. Check air filter conditions. <br />Heating Section <br />1. Check as required. <br />