Fan Cycle Control - Koolaire KY0275W Technician's Handbook

Fan Cycle Control

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.
Specifications
Model
K170
K270
Check Procedure
1. Disconnect electrical power to the ice machine at
the electrical service disconnect.
2. Verify fan motor windings are not open or grounded,
and fan spins freely.
3. Connect manifold gauges to ice machine.
4. Hook voltmeter in parallel across the fan cycle
control, leaving wires attached.
5. Reconnect electrical power to the ice machine and
set the ON/OFF/WASH toggle switch to ON.
6. Wait until water flows over the evaporator then refer
to chart below.
System
Pressure:
above cut-in
below cut-out
Part Number STH047 5/16
Cut-
n (Close)
275 psig ±5
250 psig ±5
Reading
Should Be:
0 volts
line voltage
Cut-Out (Open)
225 psig ±5
200 psig ±5
Fan
Should Be:
running
off
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