Manitowoc Q450 Service Technician's Handbook

Also see for Marine Q 1000: Use and care manual Installation instructions Service manual

Contents

Manitowoc Q450 Service Technician's Handbook Manual pdf 139 page image

ñ129ñQ420/450 Series - Self-Contained Water-CooledCharacteristics may vary depending on operating conditions.CYCLE TIMESFreeze Time + Harvest Time = Total Cycle Time24 HOUR ICE PRODUCTIONCONDENSER WATER CONSUMPTIONOPERATING PRESSURESAir Temp.Around IceMachine∞F/∞CFreeze TimeHarvestTimeTimes in minutesWater Temperature ∞F/∞C50/10.0 70/21.1 90/32.270/21.1 9.9-11.7 11.4-13.4 12.6-14.81-2.580/26.7 10.1-11.9 11.7-13.7 13.0-15.290/32.2 10.4-12.2 12.0-14.0 13.3-15.6100/37.8 10.6-12.5 12.3-14.4 13.7-16.0Air Temp. Around IceMachine ∞F/∞CWater Temperature ∞F/∞CBased on average ice slab weight of 4.12 - 4.75 lb.Regular cube derate is 7%50/10.0 70/21.1 90/32.270/21.1 520 460 42080/26.7 510 450 41090/32.2 500 440 400100/37.8 490 430 390Air Temp. Around IceMachine 90∞F/32.2∞CWater Temperature ∞F/∞CWater regulating valve set to maintain 230 PSIG discharge pressure50/10.0 70/21.1 90/32.2Gal/24 hours 400 740 2400Air Temp.Around IceMachine∞F/∞CFreeze Cycle Harvest CycleDischargePressurePSIGSuctionPressurePSIGDischargePressurePSIGSuctionPressurePSIGSuction pressure drops gradually throughout the freeze cycle50/10.0 235-245 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 85-100