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L-2448B Introduction
INTRODUCTION
WARNING
This manual contains essential safety information
concerning the safe and proper installation, opera-
tion, and maintenance of your ice making system. It
is very important that you read and understand the
contents of this manual thoroughly before installing
or using the equipment. You should keep this manual
on your boat for future reference. Failure to follow
Dometic approved installation, start-up, operation,
and troubleshooting procedures will void the war-
ranty. If there are any statements in this manual that
you do not understand, contact the Dometic Service
Department or your local dealer for assistance.
Phone 804-746-1313 or 954-973-2477 (8am-5pm US
Eastern Time), Fax 804-746-7248 or 954-979-4414,
or email sales@dometicusa.com.
NOTICE
Your ice making system uses the refrigerant R134a.
Federal law forbids the intentional release of refriger-
ant gas to the environment. You should make certain
that any field service is performed by a specialist
with the proper equipment to prevent loss of refriger-
ant during servicing.
DANGER
The equipment referenced in this manual operates
on 115 or 230 volts AC. Such voltages can be lethal,
therefore, proper care must be taking during installa-
tion, operation, and servicing to prevent injury or
loss of life.
DANGER
The equipment referenced in this manual operates
with compressed refrigerant at high pressures.
Proper care must be taken during installation,
operation, and servicing to prevent injury or loss of
life due to improper procedures.
DANGER
This equipment is not ignition protected per CFR
183.410 and may not be installed in areas that may
be exposed to flammable gases.
Drawings and Diagrams
The figures, drawings, or diagrams that are referenced
in this manual can be found directly after the warranty
section. In addition, some equipment may be shipped
with specific installation sheets or wiring diagrams that
may supercede the information located in this manual.
Dometic reserves the right to update or change any
information located herein at any time and without prior
notice.
Ice Making and Refrigeration
Basics
To produce crushed ice, heat must be moved from the
ice making water source to the seawater condensing
medium. The condensing unit contains both the com-
pressor and condenser coil. The compressor adds
pressure to the refrigerant gas, which causes an
increase in temperature. The condenser coil removes
heat and condenses the refrigerant gas into liquid. The
liquid is pumped to the expansion device which lowers
the pressure and allows the refrigerant to expand in the
evaporator. When the refrigerant expands in the evapo-
rator, it actually boils from a liquid to a gas. This
change of state allows for a large energy exchange.
After the refrigerant is fully boiled off into a gaseous
state, it flows back to the compressor again.
The evaporator in the ice maker allows cold refrigerant
gas to remove heat from the water. As the water
freezes onto the wall of the evaporator shell, it is
scraped off by the auger, and pushed to the box.
Ice Maker Components
The system consists of two main components: the
condensing unit and the auger unit. They are con-
nected by copper linesets or flexible lines. Other parts
include the control panel, seawater system, and ice
level sensor.
Condensing Unit (Figure 1)
All units have R134a compressors, water-cooled
condensers, a receiver/filter/drier, an accumulator, and
a sight glass/moisture indicator. The condensing unit
also has the logic control/electrical component box
(control box) attached. The control box is attached to
the condensing unit by an eight foot cable. It has plug-
and-play electrical connections to the auger unit and
control panel. The control box may be remotely
mounted, but must be mounted in the same orientation
as when it was shipped. The unit comes with quick
connect refrigerant fittings and is pre-charged with
refrigerant from the factory.