Fan Cycle Control - Manitowoc S300 Technician's Handbook

FAN CYCLE CONTROL

Self-Contained Air-Cooled Models Only
FUNCTION
Cycles the fan motor on and off to maintain proper
operating discharge pressure.
The fan cycle control closes on an increase, and
opens on a decrease in discharge pressure.
Model
S300 / S320
S420 / S450
S500 / S600
S850
S1000 / S1200
S1400 / S1600
S1800
CHECK PROCEDURE
1. Verify fan motor windings are not open or
grounded, and fan spins freely.
2. Connect manifold gauges to ice machine.
3. Hook voltmeter in parallel across the fan cycle
control, leaving wires attached.
4. Refer to chart below.
FCC Setpoint:
Above Cut-In
Below Cut-Out
Part Number 80-1479-3 7/10
Specifications
Cut-In (Close)
250 ±5
(1723 kPa ±.34)
(17.23 bar ±.34)
275 psig ±5
(1896 kPa ±34)
(18.96 bar±.34)
Reading Should
Be:
0 Volts
Line Voltage
Cut-Out (Open)
200 ±5
(1517 kPa ±.34)
(15.17 bar ±.34)
225 psig ±5
(1551 kPa ±34)
(15.51 bar ±.34)
Fan
Should Be:
Running
Off
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