Q1800 Series Self-Contained Air-Cooled - Manitowoc Q450 Service Technician's Handbook

Q1800 Series - Self-Contained Air-Cooled
Characteristics may vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser
°F/°C
70/21.1
80/26.7
90/32.2
100/37.8
Based on average ice slab weight of 13.0 - 14.12 lb.
Regular cube derate is 7%
OPERATING PRESSURES
Air Temp.
Entering
Condenser
°F/°C
50/10.0
70/21.1
80/26.7
90/32.2
100/37.8
110/43.3
Suction pressure drops gradually throughout the freeze cycle
Water Temperature °F/°C
50/10.0
8.5-9.3
9.0-9.9
9.6-10.5
10.6-11.6
50/10.0
Freeze Cycle
Discharge
Pressure Pressure
PSIG
220-280
220-280
230-290
260-320
300-360
320-400
Freeze Time
70/21.1
9.4-10.3
9.8-10.8
10.4-11.5
11.5-12.6
Water Temperature °F/°C
70/21.1
1880
1780
1690
1550
Suction Discharge
Pressure
PSIG PSIG
40-20 155-190
40-20 160-190
42-20 160-190
44-22 185-205
46-24 210-225
48-26 215-240
–145–
Harvest
90/32.2
9.9-10.9
10.5-11.5
11.1-12.2
12.4-13.6
90/32.2
1720 1640
1650 1560
1570 1480
1440 1350
Harvest Cycle
Suction
Pressure
PSIG
60-80
65-80
65-80
70-90
75-100
80-100
Time
1-2.5