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Manitowoc Q450 - Remote Model Operation

Manitowoc Q450
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–19–
REMOTE
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
completely purge the ice machine of old water. This
feature ensures that the ice making cycle starts with
fresh water.
The harvest valve and harvest pressure regulating
(HPR) solenoid valves also energize during water
purge, although they stay on for an additional 5
seconds (50 seconds total on time) during the initial
refrigeration system start-up.
2. Refrigeration System Start-Up
The compressor and liquid line solenoid valve
energize after the 45 second water purge and remain
on throughout the entire Freeze and Harvest
Sequences. The water fill valve is energized at the
same time as the compressor. It remains on until the
water level sensor closes for 3 continuous seconds, or
until a six-minute time period has expired. The harvest
valve and HPR solenoid valves remain on for 5
seconds during initial compressor start-up and then
shut off.
The remote condenser fan motor starts at the same
time the compressor starts and remains on throughout
the entire Freeze and Harvest Sequences.

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