Howe Rapid Freeze, Service Manual

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11 Electric Control Panel
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ice bin is full to prevent damage to the flaker from ice backing up into the evaporator section.
5) L1 L2 L3 Terminals
Main power terminals for field wiring electric power to control panel. Single phase units (standard)
wired to L1 & L2. Three phase units (special) wired to L1 L2 & L3
6) T1 T2 T3 Terminals
Terminals for field wiring ( RL model) or factory wiring (RC, SCA & SCW models) drive motor and
water pump wires. Single phase units (standard) wired to T1 & T2.
7) Solenoid Valve Terminals
Terminals for field wiring liquid line solenoid valve wires.
8) Line "A" &
A
B
@
Terminals
Terminal for providing line 2 power to solenoid valve. On RC, SCA & SCW models wired through
compressor safety switches, (high discharge pressure, & high oil pressure) to assure liquid solenoid
valve will de-energize if the compressor shuts down on a safety failure. (When connected to a
refrigeration rack, a wire jumper is placed between line
A
A
@
and line "B" in the flaker control panel.
9) On-Off Switch Terminals
Terminals for installing a remote on-off switch or auxiliary control such as a 7-day clock timer, or
remote modem for grocery store applications. (These auxiliary controls will be wired in series with the
panel mounted on-off switch, and factory wired photo eye ice level control, so all 3 switches must be
closed to start the machine, but opening ANY switch will shut the machine off.
10) Ground Terminal
Terminal for grounding ice machine and control panel to proper ground. Wire per local code
requirements.
DOOR MOUNTED ITEMS
1) On-Off Switch
Main on-off switch for control circuit. Wired in series with remote (Optional) field installed switch and
Photo Eye Ice level control.
2) Ice Flaker Run light.
Green light is on whenever the contactor and drive motor is energized.
3) Motor Overload Light
Amber light is on whenever the electronic overload opens, to stop the drive motor & pump.
4) Overload reset button.
Normally open reset button, resets overload circuit following overload condition.
Following items are on RC, SCA & SCW panels only:
1) Compressor Run Light.
Green indicating light is on when the compressor contactor is energized.