Manitowoc Marine Q 1000, Service Technician'S Handbook

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Q280 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 10.6-12.5 11.8-13.8 12.6-14.7
1.0-2.5
80/26.7 11.5-13.5 12.8-15.0 13.8-16.1
90/32.2 12.6-14.7 14.1-16.5 15.2-17.8
100/37.8 14.5-16.9 16.5-19.3 18.0-21.0
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C
Based on average ice slab weight of 2.44 - 2.81 lb.
Regular cube derate is 7%
50/10.0 70/21.1 90/32.2
70/21.1 290 265 250
80/26.7 270 245 230
90/32.2 250 225 210
100/37.8 220 195 180
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Suction pressure drops gradually throughout the freeze cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0 195-250 60-20 150-190 70-90
70/21.1 195-250 60-20 150-190 70-90
80/26.7 220-280 60-26 180-220 70-90
90/32.2 250-310 66-30 190-220 80-100
100/37.8 280-350 70-32 220-250 80-110
110/43.3 310-390 85-40 250-270 80-120