Manitowoc QD0202A, Service Manual

Page: 150 / 175

Refrigeration System Section 7
7-38
Part No. 80-1100-3
Q450 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
Q600 SERIES
Self-Contained Air-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
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
10.6-12.5 12.0-14.0 13.3-15.6
1-2.5
80/26.7 10.9-12.8 12.3-14.4 13.7-16.0
90/32.2 11.1-13.1 12.6-14.8 14.1-16.5
100/37.8 12.0-14.0 13.7-16.0 15.5-18.0
110/43.3 13.3-15.6 15.5-18.0 17.6-20.6
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
490 440 400
80/26.7 480 430 390
90/32.2 470 420 380
100/37.8 440 390 350
110/43.3 400 350 310
Based on average ice slab weight of 4.12- 4.75lb
Regular cube derate is 7%
Ratings with JC0495 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
225-245 50-32 175-190 85-100
70/21.1 230-250 50-32 175-190 85-100
80/26.7 240-260 52-32 180-195 85-100
90/32.2 245-270 54-35 185-200 85-100
100/37.8 280-310 57-37 190-205 90-105
110/43.3 290-325 64-39 190-205 95-110
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
70/21.1 7.1-8.4 7.8-9.2 8.6-10.1
1-2.5
80/26.7 7.8-9.2 8.6-10.1 9.5-11.2
90/32.2 8.6-10.1 9.5-11.2 10.4-12.2
100/37.8 9.5-11.2 10.6-12.5 12.0-14.0
Times in minutes
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 690 640 590
80/26.7 640 590 540
90/32.2 590 540 500
100/37.8 540 490 440
Based on average ice slab weight of 4.12- 4.75lb
Regular cube derate is 7%
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharg
e
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0 195-260 42-22 155-180 75-95
70/21.1 220-290 44-22 160-185 85-100
80/26.7 220-305 52-22 160-190 90-110
90/32.2 250-325 52-23 175-195 95-115
100/37.8 280-355 54-30 195-210 95-125
110/43.3 300-385 56-32 200-225 100-135
Suction pressure drops gradually throughout the freeze cycle