Hoshizaki IM-51BAE User Manual

IM SERVICE TRAINING

1

Featuring the

IM-51BAE

80041 9/9/99

All IM models have similar sequence of operation. This manual is designed as a
generic IM Training manual.

The Hoshizaki IM series ice machine
uses a horizontal evaporator design.
This compact unit is designed for
counter-top, under-counter, or free­standing installations.

A standard 120 volt power cord
provides the electrical connection.
The unit is designed to operate on a
separate 15 amp circuit.

2

The water supply connection is
½”FIP and is located at the bottom
right rear of the unit. A minimum
3/8” water line is required for proper
operation.

The drain connection is ¾”MIP and
is located on the left rear of the unit.
Since the unit will likely be enclosed,
it is recommended to use flexible
supply and drain connections. This
will allow easy removal if service is
necessary.
Access to the evaporator
compartment is gained by removing
the front and top covers.

Open the bin door and remove the
front cover screws and drain pan
thumbscrews. Lower the drain pan
pipe into the drain hole.

Lift upward on the front panel and
push backward to remove the top
cover.

This horizontal evaporator and water
distribution system is unique to the
IM series.

The ABS water plate sprays water up
into the evaporator cells to form the
square IM cube.

3

The moveable water pan assembly
includes the water plate, reservoir
pan, and pump motor assembly.

Tension springs connect two cam
arms to the water plate assembly. An
actuator motor rotates the cam arms
to raise and lower the water pan
during the ice making cycle.

4

The front cam arm has a switch lever
that operates the actuator toggle
switch located above the pan
assembly.

The actuator toggle switch controls
the direction of rotation for the
actuator motor and energizes the
pump motor during the freeze cycle.

• When the switch is in the right

position, the actuator motor
rotates counter clock wise to
lower the water pan assembly.

• When the switch is in the left

position, the actuator motor turns
clock wise to raise the water pan
assembly.

The IM51 uses a mechanical
proximity switch bin control
assembly located in the bin area.

When ice fills the bin and pushes the
control arm over, the activator
magnet moves to the switch and
closes the contacts.

The IM bin control closes the
contacts to signal the control board
to shut down the unit. This is
different from the standard KM
control, which opens the contacts to
de-energize the unit.

The louver has a flip down cover to
access the control switch.

The switch has 3 positions.

ICE, OFF, & WASH.

The louver covers the compressor
compartment. Remove the louver
screws and lift the louver forward to
access the condenser coil fan
assembly and compressor.

5

For easy access during preventative
maintenance or service, the inlet
water valve is located in the front
right hand corner of the compressor
compartment.