Manitowoc S - S450 Series

Refrigeration System Section 7
7-34
Part Number 80-1480-3
S450 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
S450 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 9.4-10.0 10.2-10.8 11.1-11.8
1-2.580/26.7 9.9-10.6 10.7-11.5 11.7-12.5
90/32.2 10.4-11.1 11.4-12.1 12.5-13.3
Times in minutes
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 450 420 390
80/26.7 430 400 370
90/32.2 410 380 350
Based on average ice slab weight of 3.40 - 3.60 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
195-255 50-30 125-150 70-90
70/21.1 195-270 60-30 135-190 80-115
80/26.7 220-285 62-32 135-195 80-115
90/32.2 250-320 70-34 175-195 85-115
100/37.8 290-390 75-35 190-215 115-140
110/43.3 320-400 80-37 225-250 130-170
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 8.9-9.5 9.6-10.3 10.7-11.5
1-2.580/26.7 9.1-9.8 9.9-10.6 11.1-11.8
90/32.2 9.4-10.0 10.2-10.8 11.4-12.1
Times in minutes
Air Temp.
Around Ice
Machine
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 470 440 400
80/26.7 460 430 390
90/32.2 450 420 380
Based on average ice slab weight of 3.40 - 3.60 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
NA 200 NA
Water regulating valve set to maintain 240 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
70/21.1 225-265 52-30 160-190 85-100
80/26.7 230-265 56-30 170-190 90-110
90/32.2 230-270 62-31 170-195 95-115
100/37.8 235-275 65-31 170-200 100-120
110/43.3 240-280 65-32 170-205 100-120
Suction pressure drops gradually throughout the freeze cycle