Manitowoc J250 User Manual

Section 7Refrigeration System
7-32
J250 SERIES
SELF-CONTAINED AIR-COOLED
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Cycle Time
Air Temp. Freeze Time Harvest
Entering
Condenser
Water Temperature °
°°
°F/°
°°
°C
Time
°
°°
°F/°
°°
°C 50/10.0 70/21.1 90/32.2
70/21.1
12.0-14.1 13.8-16.1 16.1-18.7
80/26.7
13.1-15.4 15.2-17.8 17.0-19.8
1-2.5
90/32.2
14.5-16.9 18.2-21.0 20.5-23.8
100/37.8
17.5-20.4 21.2-24.6 23.6-27.4
1
Times in minutes
24 Hour Ice Production
Air Temp.
Entering
Water Temperature °
°°
°F/°
°°
°C
Condenser
°
°°
°F/°
°°
°C
50/10.0 70/21.1 90/32.2
70/21.1
260 230 200
80/26.7
240 210 190
90/32.2
220 180 160
100/37.8
185 155 140
1
Based on average ice slab weight of 2.44 - 2.81 lb.
2
Regular cube derate is 7%
Operating Pressures
Air Temp. Freeze Cycle Harvest Cycle
Entering
Condenser
°
°°
°F/°
°°
°C
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0
200-250 70-28 160-180 80-100
70/21.1
210-280 70-28 160-180 80-100
80/26.7
230-300 75-28 170-200 90-110
90/32.2
270-340 80-30 190-200 95-115
100/37.8
310-380 85-34 220-250 120-140
110/43.3
340-430 90-38 250-280 130-150
1
Suction pressure drops gradually throughout the freeze cycle
J250 SERIES WATER-COOLED
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Cycle Time
Air Temp. Freeze Time Harvest
Around Ice
Machine
Water Temperature °
°°
°F/°
°°
°C
Time
°
°°
°F/°
°°
°C 50/10.0 70/21.1 90/32.2
70/21.1
11.0-13.0 13.8-16.1 16.1-18.7
80/26.7
11.0-13.0 13.8-16.1 16.1-18.7
1-2.5
90/32.2
11.5-13.5 14.5-16.9 17.0-19.8
100/37.8
11.5-13.5 14.5-16.9 17.0-19.8
1
Times in minutes
24 Hour Ice Production
Air Temp.
Around Ice
Water Temperature °
°°
°F/°
°°
°C
Machine
°
°°
°F/°
°°
°C
50/10.0 70/21.1 90/32.2
70/21.1
280 230 200
80/26.7
280 230 200
90/32.2
270 220 190
100/37.8
270 220 190
1
Based on average ice slab weight of 2.44 - 2.81 lb.
2
Regular cube derate is 7%
Condenser 90/32.2 Air Temperature Around Ice Machine
Water Water Temperature °
°°
°F/°
°°
°C
Consumption 50/10.0 70/21.1 90/32.2
Gal/24 hours
250 510 2400
1
Water regulating valve set to maintain 225 PSIG discharge
pressure
Operating Pressures
Air Temp. Freeze Cycle Harvest Cycle
Around Ice
Machine
°
°°
°F/°
°°
°C
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0
220-240 60-28 170-200 80-100
70/21.1
220-240 60-28 170-200 85-105
80/26.7
220-240 62-30 175-205 85-105
90/32.2
220-240 65-32 180-210 90-110
100/37.8
220-240 65-32 180-210 90-110
110/43.3
220-260 65-32 210-230 90-115
1
Suction pressure drops gradually throughout the freeze cycle

Manitowoc J250 Specifications

General

Brand	Manitowoc
Model	J250
Category	Ice Maker
Language	English