Manitowoc Q450 - Q420;450 Series Self-Contained Air-Cooled

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Q420/450 Series - Self-Contained Air-Cooled
Characteristics may vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
24 HOUR ICE PRODUCTION
OPERATING PRESSURES
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
Harvest
Time
Times in minutes
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 9.7-11.4 10.9-12.8 12.0-14.0
1-2.5
80/26.7 10.9-12.8 12.3-14.4 13.3-15.6
90/32.2 12.3-14.4 14.1-16.5 15.5-18.0
100/37.8 14.5-17.0 16.5-19.2 18.3-21.3
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C
Based on average ice slab weight of 4.12 - 4.75 lb.
Regular cube derate is 7%
50/10.0 70/21.1 90/32.2
70/21.1 530 480 440
80/26.7 480 430 400
90/32.2 430 380 350
100/37.8 370 330 300
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Suction pressure drops gradually throughout the freeze cycle
50/10.0
195-260 45-30 150-170 75-90
70/21.1 200-260 47-33 165-180 80-100
80/26.7 230-265 50-35 165-185 80-100
90/32.2 260-290 55-36 190-210 90-110
100/37.8 290-340 60-38 215-235 105-125
110/43.3 195-260 45-30 235-255 125-140