Howe 1000-RLE, Installation & Service Manual

Page: 22 / 53

22
Start
Up
&
Operation
Level Control Relay (LC1)
This relay processes the signal from the Photo
Eyes. It shuts the Ice Flaker off when the Ice Bin
is full to prevent damage caused by ice backing
up into the evaporator section.
Motor Relay (R1)
This relay provides power to the Drive Motor,
the Water Pump, and the Solenoid Valve. It
features a manual override button, which when
depressed will engage the relay contacts, even
when the relay coil is not energized.
Transformer (T1)
This provides 24 volt control power to the
Control Module, Motor Relay, and indicating
lights.
Ice Flaker Run Indicator Light
This is lit green during Normal Operation.
Motor Overload Indicator Light
This is lit amber when Ice Flaker is in Overload
Condition. The Reset Button is located on the
rear of the Ice flaker. It is a normally open
switch, which resets the circuit after an
Overload Condition.
Control Module (CM)
The control Module features eight wire
terminals, two adjustable dials, and one
indicating light.
It operates in one of three main modes:

Normal Operation

Off ‐ Delay Cycle

Overload Condition
Normal Operation
Normal Operation begins when the Control
Module senses voltage at the Control Signal
(Term 3).
During Normal Operation voltage is present at
Ice Flaker Run Switch Leg (Term 6) and the
Solenoid Valve Contacts (Term 7 & 8) are
closed.
Off ‐ Delay Cycle
The Off ‐ Delay Cycle begins when voltage is
removed from the Control Signal (Term 3).
The length of the Off ‐ Delay Cycle is determined
by the blue Off ‐ Delay Setting dial. The
increments are in minutes with 1 being the
lowest possible setting and 30 being the
highest.
During the Off ‐ Delay Cycle voltage is present at
Ice Flaker Run Switch Leg (Term 6) until the
time setting has been met. The Solenoid Valve
Contacts (Term 7 & 8) are opened when the
Off ‐ Delay Cycle is initiated.
Off ‐ Delay Setting
Under Normal Operation the Off ‐ Delay Setting
should be adjusted to run approximately 2
minutes after the Solenoid Valve shuts off the
refrigeration to the Ice Flaker.
For proper adjustment, turn knob
counterclockwise until it stops. Then turn
clockwise 1/8 turn and stop.
The 30 minute setting is used for Cleaning
Procedure only.