Dometic DX Remote & Self-Contained A/C User Manual

5
v
English
L-2086 Introduction
Subsystems
Both self-contained units and remote condensing systems
require subsystems that are purchased separately because of
the many variations and options available. These include the
seawater, air distribution, and control subsystems.
Seawater System
The seawater cooling system consists of an inlet through-hull
tting, seacock (water shut-off valve), strainer, pump, and
overboard discharge tting all connected by hose or piping. If
multiple air conditioning units are served by a single seawater
pump, then a pump relay and water manifold are required.
Air Distribution System
Cabin air is drawn into the self-contained unit or cooling/heat-
ing unit through a return air grill. It is then cooled or warmed
and b
lown back into the cabin through a ducting system. The
air should be discharged high in the cabin and away from the
return air grill to ensure good circulation. An air lter is locat
-
ed on the cooling unit or on the return air grill and must be
cleaned r
egularly.
System Controls
Two different types of controls are available, either an electro-
mechanical rotary knob switch assembly or one of the Cruisair
SMX ser
ies of microprocessor controls.
The electromechanical switch assemblies are typically 3-knob
switches that control mode (OFF, FAN, RUN), thermostat
(temperature setting), and fan speed. Other versions include 1
and 2 knob switches for control of “slave” cooling units, and a
4-knob switch for use on systems with auxiliary electric heat.
Cruisair SMX controls are advanced microprocessor systems
that provide a more comfortable environment and better system
protection than mechanical controls. In addition, over 20 pro
-
grammable functions allow the user to customize the system to
suit the specic needs of their boat and boating en
vironment.
The two SMX control systems available are SMX II and the
SMX Net. Each system consists of:
• Power/Logic (P/L) board - Monitors and controls all func
-
tions of the air conditioning unit. SMX II and SMX Net hav
e
different P/L boards and are not interchangeable.
• Keypad/Display - The SMXir is a 10-button user interface
with a digital readout and LED indicators. It is used with
SMX II or SMX Net systems.
• Temperature-Sensing Element - Air temperature is moni
-
tored by a temperature-sensing element (TSEP) that plugs
into the power/logic board.
• Connecting Cable - The keypad/display connects to the
P/L board with a CX or CXP connecting cable.
SMX Net systems may also have additional network cables
and an outside temperature sensor that plug into the P/L board.
Condensate Drain
When the air conditioner is running in the cooling mode, mois-
ture is removed from the air by the evaporator coil. This con-
densation is then caught in a drain pan and must be drained
of
f to a sump or overboard. In humid climates the system can
produce a large amount of condensate water that could cause
signicant damage to your boat if the drain system doesn’t
work properly.

Dometic DX Remote & Self-Contained A/C Specifications

General

Brand	Dometic
Model	DX Remote & Self-Contained A/C
Category	Air Conditioner
Language	English