–79–
Q1400C
Initial Start-Up or Start-Up After Automatic Shut-Off
1. Water Purge
Before the refrigeration system starts, the water pump
and water dump solenoid are energized for 45 seconds,
to purge the ice machine of old water. This feature
ensures that the ice making cycle starts with fresh
water.
Freeze Sequence
2. Prechill
Ice Machine Section: The liquid line solenoid valve
energizes after the 45-second water purge and
remains on for the entire ice making Freeze and
Harvest sequences. The liquid line solenoid is
energized for 30 seconds prior to water flow. This
allows the refrigeration system to start up and prechills
the evaporator.
CVD
®
Condensing Unit: When the refrigerant pressure
is high enough to close the low pressure switch, the
contactor coil is energized and the compressor and
condenser fan motor (CVD1475 only) start. They are
supplied with power throughout the entire Freeze and
Harvest sequences. The fan motor (CVD1475 only) is
wired through a fan cycle pressure control, therefore it
may cycle on and off.
3. Freeze
The water pump restarts after the 30-second prechill.
An even flow of water is directed across the
evaporator and into each cube cell, where it freezes.
When sufficient ice has formed, the water flow (not the
ice) contacts the ice thickness probe. After
approximately 7 seconds of continual water contact,
the Harvest sequence is initiated. The ice machine
cannot initiate a Harvest sequence until a 6-minute
freeze lock has been surpassed.
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