Manitowoc Q450 - Remote Energized Parts Chart

–22–
Remote Energized Parts Chart
Ice Making
Sequence of
Operation
Control Board Relays Contactor
Length
of Time
1
Water
Pump
2
Water Fill
Valve
3
a. Harvest
Valve(s)
b. HPR
Solenoid
4
Water
Dump
Valve
5
a. Contactor
Coil
b. Liquid Line
Solenoid
5A
Compressor
5B
Condenser
Fan Motor
Initial Start-Up 1. Water Purge
On Off On On Off Off Off
45 Seconds
2. Refrigeration
System Start-up
Off On On Off On On On
5 Seconds
Freeze Sequence 3. Prechill
Off
May Cycle
On/Off
during first
45 sec.
Off Off On On On
30 Seconds
4. Freeze On
Cycles
On then Off
one more
time
Off Off On On On
Unit 7 Sec.
Water Contact
w/Ice Thickness
Probe