Manitowoc J-1300, Service Manual

Page: 145 / 165

Section 7 Refrigeration System
7-40
J1300 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 8.8-9.8 10.2-11.4 11.5-12.8
80/26.7 9.1-10.1 10.5-11.7 12.0-13.3 1-2.5
90/32.2 9.8-10.9 11.4-12.6 13.0-14.5
100/37.8 10.8-12.0 12.8-14.2 14.9-16.5
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 1400 1230 1110
80/26.7 1360 1200 1070
90/32.2 1280 1120 990
100/37.8 1170 1010 880
1
Based on average ice slab weight of 10.0 - 11.0 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
220-280 40-20 140-170 65-80
70/21.1
220-280 40-20 145-170 70-80
80/26.7
220-280 42-22 150-185 70-80
90/32.2
245-300 48-26 160-190 70-85
100/37.8
275-330 50-26 160-210 70-90
110/43.3
280-360 52-28 165-225 75-100
1
Suction pressure drops gradually throughout the freeze cycle
J1300 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
8.5-9.5 9.5-10.6 11.1-12.4
80/26.7
8.6-9.7 9.7-10.8 11.4-12.6
1-2.5
90/32.2
8.8-9.8 9.8-11.0 11.6-12.9
100/37.8
8.9-10.0 10.0-11.2 11.8-13.2
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
1440 1310 1140
80/26.7
1420 1290 1120
90/32.2
1400 1270 1100
100/37.8
1380 1250 1080
1
Based on average ice slab weight of 10.0 - 11.0 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 1150 2400 7700
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 40-18 150-180 70-80
70/21.1
235-245 40-18 150-180 70-80
80/26.7
235-245 40-20 150-180 70-80
90/32.2
235-250 42-20 150-180 70-80
100/37.8
235-255 44-20 150-180 70-80
110/43.3
240-265 46-20 150-180 70-80
1
Suction pressure drops gradually throughout the freeze cycle