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Ice Making Sequence of Operation
Q0600C/Q0800C/Q1000C/SU1000C
Initial Start-Up or Start-Up After
Automatic Shut-Off
1. Water Purge
Before the compressor starts, the water pump and
water dump solenoid are energized for 45 seconds to
purge the ice machine of old water. This ensures that
the ice-making cycle starts with fresh water.
The cool vapor solenoid valve is also energized during
the water purge, although it stays on for an additional
5 seconds (50-second total on time) during the initial
refrigeration system start-up.
2. Refrigeration System Start-Up
Ice Machine Section: The liquid line solenoid valve
energizes after the 45-second water purge, and
remains on throughout the entire Freeze and Harvest
sequences. The cool vapor solenoid valve remains on
for 5 seconds during initial compressor start-up and
then shuts off.
The water fill valve is energized at the same time as
the liquid line solenoid valve.
CVD
®
Condensing Unit: When the refrigerant pressure
is high enough to close the low-pressure control (after
the cool vapor valve energizes in step 1), the contactor
coil is energized and the compressor starts. The
compressor and fan cycling control* are supplied with
power throughout the entire Freeze and Harvest
sequences. When the refrigerant pressure is high
enough to close the fan cycling pressure control, the
condenser fan motor starts.
*The Q0600C ice machines does not use a fan cycling
control. The compressor and the condenser fan motor are
wired through the contactor. Anytime the contactor coil is
energized, these components are supplied with power.
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