Manitowoc S model, Service Manual

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Refrigeration System Section 7
7-32
Part Number 80-1480-3
S320 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
S320 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
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 12.3-14.0 13.1-14.9 14.1-16.0
1-2.5
80/26.7 13.1-14.9 14.6-16.6 15.8-18.0
90/32.2 15.2-17.3 17.2-19.5 18.0-20.4
100/37.8 18.0-20.4 19.8-22.4 20.8-23.5
Times in minutes
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 340 320 300
80/26.7 320 290 270
90/32.2 280 250 240
100/37.8 240 220 210
Based on average ice slab weight of 3.25 - 3.65 lb
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0 195-260 60-34 130-160 80-115
70/21.1 195-260 70-36 130-165 90-120
80/26.7 215-295 75-36 140-165 110-125
90/32.2 240-320 80-38 155-180 120-135
100/37.8 290-365 90-40 175-215 14-165
110/43.3 325-415 95-42 200-230 160-185
Suction pressure drops gradually throughout the freeze cycle
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 12.7-14.4 13.6-15.5 15.2-17.3
1-2.5
80/26.7 13.1-14.9 14.1-16.0 15.2-17.3
90/32.2 13.6-15.5 14.6-16.6 15.8-18.0
100/37.8 14.1-16.0 15.2-17.3 16.5-18.7
Times in minutes
Air Temp.
Around Ice
Machine
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 330 310 280
80/26.7 320 300 280
90/32.2 310 290 270
100/37.8 300 280 260
Based on average ice slab weight of 3.25 - 3.65 lb
Condenser
Water
Consumption
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
59/15.0 70/21.1 90/32.2
Gal / per
100 lbs of ice
90 160 1010
Water regulating valve set to maintain 230 PSIG discharge pressure
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0 225-245 60-38 150-185 85-105
70/21.1 225-245 68-38 150-190 100-120
80/26.7 225-250 78-39 155-195 110-145
90/32.2 225-255 80-40 155-200 115-145
100/37.8 225-260 82-41 155-205 120-150
110/43.3 225-265 85-42 155-210 120-150
Suction pressure drops gradually throughout the freeze cycle