Manitowoc J-1300, Service Manual

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Section 7 Refrigeration System
7-37
J800 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 8.8-10.2 10.3-11.9 11.9-13.6
80/26.7 9.4-10.8 11.0-12.7 12.5-14.4 1-2.5
90/32.2 10.5-11.5 11.6-13.3 13.3-15.2
100/37.8 11.6-13.4 13.6-15.5 15.0-17.2
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
70/21.1 800 700 620
80/26.7 760 660 590
90/32.2 720 630 560
100/37.8 630 550 500
1
Based on average ice slab weight of 5.75 - 6.50 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
220-240 31-18 135-180 65-90
70/21.1
220-240 32-18 140-180 70-90
80/26.7
225-260 36-20 140-180 70-95
90/32.2
260-295 38-22 150-200 80-100
100/37.8
300-330 40-24 210-225 80-100
110/43.3
320-360 44-26 210-240 85-120
1
Suction pressure drops gradually throughout the freeze cycle
J800 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
8.8-10.2 9.7-11.1 11.9-13.6
80/26.7
9.1-10.5 10.5-11.5 12.3-14.1
1-2.5
90/32.2
9.4-10.8 10.3-11.9 12.8-14.6
100/37.8
9.7-11.1 10.7-12.3 13.3-15.2
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
800 740 620
80/26.7
780 720 600
90/32.2
760 700 580
100/37.8
740 680 560
1
Based on average ice slab weight of 5.75 - 6.50 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 610 1300 6700
1
Water regulating valve set to maintain 230 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
225-235 33-20 160-185 65-85
70/21.1
225-235 34-20 165-185 70-85
80/26.7
225-235 34-20 165-185 70-85
90/32.2
225-235 36-22 165-185 70-85
100/37.8
225-235 36-22 165-185 70-85
110/43.3
225-240 38-24 170-190 75-90
1
Suction pressure drops gradually throughout the freeze cycle