Manitowoc S model, Service Manual

Page: 141 / 168

Section 7 Refrigeration System
Part Number 80-1480-3
7-35
S500 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
S500 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 9.5-11.2 11.1-13.1 12.0-14.0
1-2.5
80/26.7 10.4-12.2 12.3-14.4 12.6-14.8
90/32.2 11.4-13.4 13.3-15.6 14.1-16.5
100/37.8 13.7-16.0 15.0-17.5 15.9-18.6
Times in minutes
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 540 470 440
80/26.7 500 430 420
90/32.2 460 400 380
100/37.8 390 360 340
Based on average ice slab weight of 4.12 - 4.75 lb
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0 200-255 44-26 130-160 75-90
70/21.1 200-255 47-28 135-160 80-95
80/26.7 220-295 50-29 160-175 90-105
90/32.2 250-325 55-31 175-205 105-120
100/37.8 270-370 60-32 200-225 120-145
110/43.3 290-425 75-36 220-260 150-165
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 9.3-10.9 10.6-12.5 12.0-14.0
1-2.5
80/26.7 9.7-11.4 10.9-12.8 12.3-14.4
90/32.2 9.9-11.7 10.9-12.8 12.6-14.8
100/37.8 10.1-11.9 11.4-13.4 13.0-15.2
Times in minutes
Air Temp.
Around Ice
Machine
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 550 490 440
80/26.7 530 480 430
90/32.2 520 480 420
100/37.8 510 460 410
Based on average ice slab weight of 4.12 - 4.75lb
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
87 138 458
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
50/10.0 225-235 45-30 160-180 80-115
70/21.1 225-260 45-30 165-195 90-120
80/26.7 225-265 46-31 165-195 95-120
90/32.2 230-265 46-32 165-195 95-120
100/37.8 230-270 48-32 165-200 100-125
110/43.3 235-270 50-32 165-205 105-125
Suction pressure drops gradually throughout the freeze cycle