Installation Guide

92 Part Number STH14 9/10
Refrigeration Compressor
Output
• There are three wires from the ice
bank probe to the control box.
The white wire connects to the
low ice bank probe pin (probe pin
nearest evaporator coil). All three
probe pins must be immersed in
water to initiate the refrigeration
cycle. The refrigeration system
will operate until the low ice bank
probe pin and center ice bank
probe pin (black wire to the
control box) is covered by ice.
The third ice bank probe pin
(probe pin farthest from
evaporator coil) is the common or
ground pin. The common or
ground ice bank probe pin (green
wire to the control box) should
always be immersed in water and
never in ice of ice bank.
• Note: A delay circuit is built into
compressor and fan motor circuit.
Delay is (4) minutes (±20%) and
will prevent compressor start-up if
there is a power loss to the unit or
the compressor switch is in OFF
position and then placed in ON
position. Delay will also apply if
refrigeration cycle is stopped on
full ice bank and ice bank probe
sends a faulty signal to restart
refrigeration system within the (4)
minute delay time.
Element Function
STH14.book Page 92 Thursday, September 23, 2010 3:35 PM