Section 7Refrigeration System7-34J420/450 SERIESSELF-CONTAINED AIR-COOLEDNOTE: These characteristics may vary depending onoperating conditions.Cycle TimesFreeze Time + Harvest Time = Cycle TimeAir Temp. Freeze Time HarvestEnteringCondenser Water Temperature °°°°F/°°°°C Time°°°°F/°°°°C 50/10.0 70/21.1 90/32.270/21.1 9.5-11.2 10.9-12.8 12.3-14.480/26.7 10.4-12.2 12.0-14.1 13.7-16.0 1-2.590/32.2 12.0-14.0 14.1-16.5 16.5-19.2100/37.8 13.3-15.6 16.0-18.6 18.3-21.31Times in minutes24 Hour Ice ProductionAir Temp.Entering Water Temperature °°°°F/°°°°CCondenser°°°°F/°°°°C 50/10.0 70/21.1 90/32.270/21.1 540 480 43080/26.7 500 440 39090/32.2 440 380 330100/37.8 400 340 3001Based on average ice slab weight of 4.12 - 4.75 lb.2Regular cube derate is 7%Operating PressuresAir Temp. Freeze Cycle Harvest CycleEnteringCondenser°°°°F/°°°°CDischargePressurePSIGSuctionPressurePSIGDischargePressurePSIGSuctionPressurePSIG50/10.0 195-240 45-30 150-170 75-9070/21.1 205-260 47-33 165-180 80-10080/26.7 230-265 50-35 165-185 80-10090/32.2 260-290 55-36 190-210 90-110100/37.8 290-340 60-38 215-235 105-125110/43.3 330-395 75-40 235-255 125-1401Suction pressure drops gradually throughout the freeze cycleJ420/450 SERIES WATER-COOLEDNOTE: These characteristics may vary depending onoperating 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 9.9-11.7 11.4-13.4 13.3-15.680/26.7 10.1-11.9 11.7-13.7 13.7-16.0 1-2.590/32.2 10.4-12.2 12.0-14.1 14.1-16.5100/37.8 10.6-12.5 12.3-14.4 14.5-17.01Times in minutes24 Hour Ice ProductionAir Temp.Around Ice Water Temperature °°°°F/°°°°CMachine°°°°F/°°°°C 50/10.0 70/21.1 90/32.270/21.1 520 460 40080/26.7 510 450 39090/32.2 500 440 380100/37.8 490 430 3701Based on average ice slab weight of 4.12 - 4.75 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 400 740 24001Water regulating valve set to maintain 240 PSIG dischargepressureOperating PressuresAir Temp. Freeze Cycle Harvest CycleAround IceMachine°°°°F/°°°°CDischargePressurePSIGSuctionPressurePSIGDischargePressurePSIGSuctionPressurePSIG50/10.0 235-245 50-35 165-180 85-10070/21.1 235-245 50-35 165-180 85-10080/26.7 235-245 50-35 165-180 85-10090/32.2 235-245 52-35 165-180 85-100100/37.8 235-245 52-35 165-185 85-100110/43.3 240-250 55-36 165-185 85-1001Suction pressure drops gradually throughout the freeze cycle
