Manitowoc J-1300, Service Manual

Page: 28 / 165

Section 2 Installation References
2-17
INTERNAL CONDENSER VOLUME
The multi-circuit condenser internal volume must not
be less, nor greater, than that used by Manitowoc.
CAUTION
Do not exceed internal volume and try to add
charge to compensate. Compressor failure will
result.
CONDENSER
∆∆∆∆
T
∆
T is the difference in temperature between the
condensing refrigerant and the entering air. The
∆
T
should be 15-20
°
F at the beginning of the freeze
cycle (peak load conditions) and drop to 12-17
°
F
during the last 75% of the freeze cycle (average load
conditions).
REFRIGERANT CHARGE
Remote ice machines have the serial plate refrigerant
charge (total system charge) located in the ice maker
section. Remote condensers and line sets are supplied
with only a vapor charge.
CAUTION
Never add more than nameplate charge to ice
machine for any reason.
QUICK-CONNECT FITTINGS
The ice machine and the line sets come with quick-
connect fittings. It is recommended that matching
quick-connects (available from Manitowoc
distributors) be installed in the multi-circuit
condenser, and a vapor “holding” charge (5 oz.) of
refrigerant be added.
Model
Refrigerant
Heat of
Rejection
Internal
Condenser
Volume
(cu. ft.)
Design
Pressure
Quick-Connect
Stubs-Male Ends
Head Pressure
Control
Type Charge Avg.
BTU/Hr
Peak
BTU/Hr
Min. Max. Discharge Liquid
Valve
J450 R404-A 6 lb. 7,000 9,600 0.020 0.035 500 psig coupling coupling Manitowoc
J600 R404-A 8 lb. 9,000 13,900 0.045 0.060
safe
working
P/N 83-6035-3 P/N 83-6034-3 P/N 83-6809-3
J800 R404-A 8 lb. 12,400 19,500 0.045 0.060 pressure, mounting mounting NO SUBSTITUTES
J1000 R404-A 9.5 lb. 16,000 24,700 0.065 0.085 2500 psig flange flange
J1300 R404-A 14 lb.
1
24,000 35,500 0.085 0.105 burst P/N 83-6006-3 P/N 83-6005-3
J1800 R404-A 17 lb.
1
36,000 50,000 0.130 0.170 pressure
1
Amount reflects additional refrigerant added to nameplate charge to ensure proper operation at all ambient conditions.
J1300 has an additional 1.5 lb., J1800 has an additional 2.0 lb.