Manitowoc J250 User Manual

Section 7Refrigeration System
7-42
J1800 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
8.8-9.7 10.1-11.1 11.9-13.1
80/26.7
8.9-9.9 10.2-11.2 12.1-13.2
1-2.5
90/32.2
9.0-10.0 10.4-11.4 12.3-13.4
100/37.8
9.2-10.1 10.6-11.6 12.5-13.7
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
1840 1640 1420
80/26.7
1820 1620 1400
90/32.2
1800 1600 1380
100/37.8
1780 1580 1360
1
Based on average ice slab weight of 13.19- 14.31 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
1300 2400 7100
1
Water regulating valve set to maintain 240 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
235-245 36-20 170-190 65-80
70/21.1
235-245 38-20 170-190 65-80
80/26.7
235-245 40-20 170-190 65-80
90/32.2
235-250 42-22 175-190 65-80
100/37.8
235-255 44-22 175-190 65-80
110/43.3
235-260 46-22 175-190 65-80
1
Suction pressure drops gradually throughout the freeze cycle
J1800 SERIES REMOTE
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
-20/-28.9 to
70/21.1
9.2-10.2 10.6-11.6 11.5-12.6
80/26.7
9.4-10.4 10.8-11.8 11.7-12.9
1-2.5
90/32.2
9.7-10.7 11.2-12.2 12.1-13.2
100/37.8
10.2-11.2 11.9-13.1 13.3-14.6
110/43.3
11.0-12.1 12.9-14.2 14.9-16.3
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
-20/-28.9 to
70/21.1
1770 1570 1470
80/26.7
1735 1545 1435
90/32.2
1700 1500 1400
100/37.8
1620 1420 1280
110/43.3
1520 1320 1160
1
Based on average ice slab weight of 13.19- 14.31 lb.
2
Regular cube derate is 7%
3
Ratings with JC1895 condenser, dice or half-dice cubes
Operating Pressures
Air Temp. Freeze Cycle Harvest Cycle
Entering
Condenser
°
°°
°F/°
°°
°C
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
-20/-28.9 to
50/10.0
220-250 38-24 160-180 60-80
70/21.1
250-260 40-24 170-180 60-80
80/26.7
250-270 48-24 175-190 70-90
90/32.2
250-280 50-24 180-200 80-90
100/37.8
270-300 52-28 205-215 80-95
110/43.3
300-350 54-28 205-230 80-100
1
Suction pressure drops gradually throughout the freeze cycle

Manitowoc J250 Specifications

General

Brand	Manitowoc
Model	J250
Category	Ice Maker
Language	English