Manitowoc Marine Q 1000, Service Technician'S Handbook

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Q280 Series - Self-Contained Water-Cooled
Characteristics may vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
24 HOUR ICE PRODUCTION
CONDENSER WATER CONSUMPTION
OPERATING PRESSURES
Air Temp.
Around Ice
Machine
°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 12.0-14.1 12.3-14.4
1-2.5
80/26.7 10.8-12.7 12.3-14.4 13.8-16.1
90/32.2 11.0-13.0 12.6-14.7 14.1-16.5
100/37.8 11.3-13.2 12.8-15.0 14.5-16.9
Air Temp. Around Ice
Machine °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
70/21.1 290 260 255
80/26.7 285 255 230
90/32.2 280 250 225
100/37.8 275 245 220
Air Temp. Around Ice
Machine 90°F/32.2°C
Water Temperature °F/°C
Water regulating valve set to maintain 230 PSIG discharge pressure
50/10.0 70/21.1 90/32.2
Gal/24 hours 250 490 3400
Air Temp.
Around Ice
Machine
°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
50/10.0 225-235 60-28 190-200 75-90
70/21.1 225-235 60-28 190-200 80-90
80/26.7 225-240 60-28 190-200 80-90
90/32.2 225-245 62-28 190-200 80-90
100/37.8 225-250 62-30 190-200 80-90
110/43.3 225-260 64-32 195-205 80-95