Manitowoc QD0202A, Service Manual

Page: 158 / 175

Refrigeration System Section 7
7-46
Part No. 80-1100-3
Q1800 SERIES
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
24 Hour Ice Production
Operating Pressures
Q1800 SERIES
Remote
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
24 Hour Ice Production
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
Freeze Time
Harvest
Time
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 8.7-9.6 9.6-10.5 10.8-11.9
1-2.5
80/26.7 9.0-9.9 9.6-10.6 10.8-11.9
90/32.2 9.1-10.1 9.7-10.7 10.9-12.0
100/37.8 9.2-10.1 9.8-10.7 11.1-12.1
Times in minutes
Air Temp.
Around Ice
Machine
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 1840 1690 1520
80/26.7 1780 1680 1520
90/32.2 1760 1670 1510
100/37.8 1750 1660 1490
Based on average ice slab weight of 13.0- 14.12lb
Regular cube derate is 7%
Condenser
Water
Consumption
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
Gal/24 hours 2000 2670 7750
Water regulating valve set to maintain 240 PSIG discharge pressure
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle Harvest Cycle
Discharg
e
Pressure
PSIG
Suction
Pressure
PSIG
Discharg
e
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0 235-245 36-20 170-190 65-80
70/21.1 235-245 38-20 170-190 65-80
80/26.7 235-245 40-20 170-190 65-80
90/32.2 235-250 42-22 175-190 65-80
100/37.8 235-255 44-22 175-190 65-80
110/43.3 235-260 46-22 175-190 65-80
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
Harvest
Time
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
-20/-28.9 to
70/21.1
9.1-10.0 9.8-10.8 10.7-11.7
1-2.5
80/26.7 9.3-10.2 10.1-11.1 10.9-12.0
90/32.2 9.5-10.5 10.3-11.4 11.1-12.2
100/37.8 10.1-11.1 11.1-12.2 11.9-13.0
110/43.3 11.0-12.1 12.1-13.2 12.7-13.9
Times in minutes
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
-20/-28.9 to
70/21.1
1770 1650 1540
80/26.7 1735 1615 1510
90/32.2 1700 1580 1480
100/37.8 1620 1480 1400
110/43.3 1500 1380 1320
Based on average ice slab weight of 13.0 - 14.12lb
Regular cube derate is 7%
Ratings with JC1895 condenser, dice or half dice cubes
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharg
e
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
-20/-28.9 to
50/10.0
220-250 38-24 160-180 60-80
70/21.1 220-260 40-24 170-180 60-80
80/26.7 250-270 48-24 175-190 70-90
90/32.2 250-280 50-24 180-200 80-90
100/37.8 270-300 52-28 205-215 80-95
110/43.3 300-350 54-28 205-230 80-100
Suction pressure drops gradually throughout the freeze cycle