Manitowoc Marine Q 1800 Service Manual

Also see for Marine Q 1000: Use and care manual Installation instructions Service technician's handbook

Contents

44Refrigeration SystemCycle Time/24 Hour Ice Production/Refrigerant Pressure ChartsQ1800 SERIES WATER-COOLEDNOTE: These characteristics may vary dependingon operating conditions.Cycle TimesFreeze Time + Harvest Time = Cycle TimeAir Temp. Freeze Time HarvestAround IceMachine Water Temperature °F/°C Time°F/°C 50/10.0 70/21.1 90/32.270/21.1 8.7-9.6 9.6-10.5 10.8-11.980/26.7 9.0-9.9 9.6-10.6 10.8-11.9 1-2.590/32.2 9.1-10.1 9.7-10.7 10.9-12.0100/37.8 9.2-10.1 9.8-10.7 11.1-12.11Times in minutes24 Hour Ice ProductionAir Temp.Around Ice Water Temperature °F/°CMachine°F/°C 50/10.0 70/21.1 90/32.270/21.1 1840 1690 152080/26.7 1780 1680 152090/32.2 1760 1670 1510100/37.8 1750 1660 14901Based on average ice slab weight of 13.0 – 14.12 lb.2Regular cube derate is 7%Condenser 90/32.2 Air Temperature Around Ice MachineWater Water Temperature °F/°CConsumption 50/10.0 70/21.1 90/32.2Gal/24 hours 2000 2670 77501Water regulating valve set to maintain 240 PSIG dischargepressureOperating PressuresAir Temp. Freeze Cycle Harvest CycleAround IceMachine°F/°CDischargePressurePSIGSuctionPressurePSIGDischargePressurePSIGSuctionPressurePSIG50/10.0 235-245 36-20 170-190 65-8070/21.1 235-245 38-20 170-190 65-8080/26.7 235-245 40-20 170-190 65-8090/32.2 235-250 42-22 175-190 65-80100/37.8 235-255 44-22 175-190 65-80110/43.3 235-260 46-22 175-190 65-801Suction pressure drops gradually throughout the freeze cycle