Kelvinator R-404A Installation Manual

Kelvinator R-404A Installation Manual Manual pdf 15 page image

GENERAL OPERATIONSPRINCIPLES OF OPERATION 13All the dipping cabinet models are of the same basicdesign, consisting of a bare tube condenser and a captube fed tank wrap evaporator.Ice formation on the walls over a period of time isnormal. This frost should be scraped off periodically inorder to maintain peak performance. These cabinetsare thermostatically controlled for various temperaturerequirements. The thermostat is located post adjacentto the unit compartment and can be accessed foradjustment by the user with a screwdriver or a dime.Thermostat position #1 being the warmest andposition #7 the coldest.These cabinets are manual defrost and a drain isprovided for periodic cleaning. A garden hose can beattached to the drain plug for draining away any waterthat might have accumulated. This drain attachment islocated in the front base rail of the cabinet. NOTE: Thepower supply cord must be disconnected whencleaning or servicing these cabinets.NOTE: On initial cabinet pull down the bare tubecondenser may become warm to the touch untilthe normal operating temperatures are achieved.Refer to model serial data tag for cabinet amperage,refrigerant charge & type.Compressors being used in these cabinets utilizerefrigerant 404A and polyol ester oil. Because of thehygroscopic nature of this oil, extreme care must betaken when any component is changed within thesystem. In the case of compressor replacement, workshould be completed before the caps are removedfrom the compressor.Agitation of the oil should be kept to a minimum.Compressors should not be open to the atmospherefor more than 15 minutes max. Should contaminationoccur the oil can be removed and recharged (followingcompressor manufacturer's guidelines whenperforming this procedure). Because of the porousnature of plastic, polyol ester oil should be stored in ametal container. Moisture contained within the oilcannot be removed even under high vacuumconditions and must be replaced.