Manitowoc Equipment WorksDivision of The Manitowoc Company, Inc. • 2110 South 26 Street, P.O. Box 1720, Manitowoc , WI 54221-1720 USATelephone 414-682-0161 • Fax - Sales: 414-683-7589 • Service/Parts: 414-683-7585 • Other: 414-683-7879G-0400 REFRIGERANT FIELDCONVERSION PROCEDURER-502 to R-402BFOR MODELSGR-0400A GR-0401W GR-0490NGD-0402A GD-0403W GD-0492NGY-0404A GD-0405W GY-0494NWARNING!Use only R-402B asretrofit refrigerant. Otherreplacement refrigerantsmay cause poor performanceand/or component failure.EQUIPMENT MODIFICATION REQUIREMENTSComponent Change RequiredCompressor None (replacement compressor is precharged with POE oil)Expansion Valve (TXV) NoneHigh Pressure Cut-out NoneLow Pressure Cut-out (Remotes) NoneFan Cycling Control (Air-cooled) NoneAll Solenoid Valves NoneWater Regulating Valve (Water-cooled) NoneHeat Exchanger NoneElectrical Wiring NoneBranch Circuit Fuse Size NoneAir-cooled Condenser NoneWater-cooled Condenser NoneEvaporator NoneSYSTEM PERFORMANCE AFTER CONVERSIONDaily Ice Production Energy EfficiencyG-0400 8% increase 5% increase Operating discharge (high) pressure: air-cooled models will run 20-30 psig (138-207 kPa gauge)higher than R-502 pressures published in service manuals. Set water-cooled head pressure the sameas R-502 settings. Operating suction (low) pressure: will run 1-3 psig (7-21 kPa gauge) higher than R-502 pressurepublished in service manuals.8010513Sheet 1 of 208/96