TECH - SPEC'S Technician's Pocket Guide - Hoshizaki America, Inc.

Pressure switch chart for R-404A models:
Models part number cut out cut in
(psig.) (psig.)
DCM-240B 3A0740-01 400 ±10 270 ±10
All KM & DCM water-cooled,
All F models 433441-05 384 ± 21.3 284± 21.3
DCM-500/750BAF All KM
air & remote, 433441-07 412 ± 21. 327 ± 21.3
BIN CONTROL
KM BIN CONTROLS:
KM/KML cubers will use one of three types of bin controls.
The type of bin control will vary depending on the unit style,
or model and serial number.
1. THERMOSTATIC BIN CONTROL:
The thermostatic bin control is the primary control that supplies
115 volts to all major components in the unit except the
compressor. When this control is closed, 115V is supplied
to the control transformer and to the K1 control board
connector which switches 115 volts to the components as
the sequence dictates. A thermostatic capillary bulb is
mounted in the ice drop zone area or on a drop down
bracket which extends into the bin cavity.
The Thermostatic control is normally closed. (It opens on
temperature drop and closes on temperature rise.) When
ice touches the thermostatic bulb, the bulb pressure opens
the bin control switch to shut the unit down. The thermostatic
bin control will shut the unit down at any point in the
sequence of operation if ice contacts the control bulb. The
shut down time will depend on the control adjustment. This
adjustment is factory set however it should always be
checked at start-up to assure proper operation. High
altitude areas require adjustment. When ice is moved
away from the bulb, the unit will always restart in the 1-
minute fill cycle.
Note: The unit will not operate in either ICE or WASH unless
the thermostatic bin control switch is closed.
Larger M models and S models include a drop down bulb
bracket. This bracket should be secured to the unit base
and the control plug connection must be made before
the unit will operate. A bin control extension bracket is
included with all S models. Be sure to install the extension
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2/20/03