Section 7
Refrigeration System
7-34
J420/450 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
9.5-11.2
10.9-12.8
12.3-14.4
80/26.7
10.4-12.2
12.0-14.1
13.7-16.0
1-2.5
90/32.2
12.0-14.0
14.1-16.5
16.5-19.2
100/37.8
13.3-15.6
16.0-18.6
18.3-21.3
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
70/21.1
540
480
430
80/26.7
500
440
390
90/32.2
440
380
330
100/37.8
400
340
300
1
Based on average ice slab weight of 4.12 - 4.75 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
195-240
45-30
150-170
75-90
70/21.1
205-260
47-33
165-180
80-100
80/26.7
230-265
50-35
165-185
80-100
90/32.2
260-290
55-36
190-210
90-110
100/37.8
290-340
60-38
215-235
105-125
110/43.3
330-395
75-40
235-255
125-140
1
Suction pressure drops gradually throughout the freeze cycle
J420/450 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
9.9-11.7
11.4-13.4
13.3-15.6
80/26.7
10.1-11.9
11.7-13.7
13.7-16.0
1-2.5
90/32.2
10.4-12.2
12.0-14.1
14.1-16.5
100/37.8
10.6-12.5
12.3-14.4
14.5-17.0
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
520
460
400
80/26.7
510
450
390
90/32.2
500
440
380
100/37.8
490
430
370
1
Based on average ice slab weight of 4.12 - 4.75 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
400
740
2400
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
50-35
165-180
85-100
70/21.1
235-245
50-35
165-180
85-100
80/26.7
235-245
50-35
165-180
85-100
90/32.2
235-245
52-35
165-180
85-100
100/37.8
235-245
52-35
165-185
85-100
110/43.3
240-250
55-36
165-185
85-100
1
Suction pressure drops gradually throughout the freeze cycle
Содержание J-1300
Страница 1: ...J Model Service Manual 1997 Manitowoc Ice Inc Part No 83 5631 9 Rev A 8 97 Ice Machines ...
Страница 10: ...Warranty Section 1 1 2 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 14: ...Section 2 Installation References 2 4 deflector is compatible with Manitowoc ice machines ...
Страница 29: ...Section 2 Installation References 2 18 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 45: ...Section 3 Maintenance 3 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 105: ...Section 6 Electrical System 6 54 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 148: ...Section 7 Refrigeration System 7 43 THIS PAGE INTENTIONALLY LEFT BLANK ...
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