ICE MACHINES Q-Model Service Manual

Section 7Refrigeration SystemQ320 SERIESSelf-Contained Air-CooledNOTE: These characteristics may vary depending onoperating conditions.Cycle TimesFreeze Time + Harvest Time = Total Cycle TimeQ320 SERIESSelf-Contained Water-CooledNOTE: These characteristics may vary depending onoperating conditions.Cycle TimesFreeze Time + Harvest Time = Total Cycle TimeAir Temp.EnteringCondenser°F/°CFreeze TimeWater Temperature °F/°C50/10.0 70/21.1 90/32.2HarvestTimeAir Temp.Around IceMachine°F/°CFreeze TimeWater Temperature °F/°C50/10.0 70/21.1 90/32.2HarvestTime70/21.1 12.2-13.9 13.1-14.9 14.2-16.270/21.1 12.6-14.4 13.6-15.5 15.4-17.680/26.7 13.6-15.5 14.8-16.8- 16.1-18.490/32.2 16.1-18.4 17.7-20.2 19.7-22.3100/37.8 19.7-22.3 22.0-25.0 25.0-28.31-2.580/26.7 13.1-14.9 14.2-16.2 16.1-18.490/32.2 13.6-15.5 14.8-16.8 16.9-19.2100/37.8 14.2-16.2 15.4-17.6 17.7-20.21-2.5Times in minutesTimes in minutes24 Hour Ice Production24 Hour Ice ProductionAir Temp.Water Temperature °F/°CEnteringCondenser 50/10.0 70/21.1 90/32.2°F/°C70/21.1 310 290 27080/26.7 280 260 24090/32.2 240 220 200100/37.8 200 180 160Based on average ice slab weight of 2.94 - 3.31lbRegular cube derate is 7%Air Temp.Water Temperature °F/°CAround IceMachine 50/10.0 70/21.1 90/32.2°F/°C70/21.1 300 280 25080/26.7 290 270 24090/32.2 280 260 230100/37.8 270 250 220Based on average ice slab weight of 2.94 - 3.31 lbRegular cube derate is 7%Operating PressuresAir Temp.EnteringCondenser°F/°CFreeze CycleDischargePressurePSIGSuctionPressurePSIGHarvest CycleDischargePressurePSIGSuctionPressurePSIG50/10.0 200-250 50-36 150-180 75-9070/21.1 200-250 50-36 160-190 80-10080/26.7 220-280 50-36 170-200 90-11090/32.2 230-320 54-38 180-220 90-120100/37.8 270-360 56-40 200-250 95-140110/43.3 280-380 58-42 210-260 95-150Suction pressure drops gradually throughout the freeze cycleCondenserWaterConsumptionOperating Pressures90/32.2 Air TemperatureAround Ice MachineWater Temperature °F/°C50/10.0 70/21.1 90/32.2Gal/24 hours 270 560 3200Water regulating valve set to maintain 230 PSIG discharge pressureAir Temp.Around IceMachine°F/°CFreeze CycleDischargePressurePSIGSuctionPressurePSIGHarvest CycleDischargePressurePSIGSuctionPressurePSIG50/10.0 225-235 50-36 160-180 80-11070/21.1 225-235 50-36 170-190 85-11580/26.7 225-240 50-36 170-200 85-11590/32.2 225-250 50-36 170-210 90-120100/37.8 225-260 52-36 170-210 90-120110/43.3 225-265 54-36 175-215 95-125Suction pressure drops gradually throughout the freeze cyclePart No. 80-1100-3 7-35