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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
fitting, seacock (water shut-off valve), strainer, pump, and
overboard discharge fitting 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 blown 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 filter is locat-
ed on the cooling unit or on the return air grill and must be
cleaned regularly.
System Controls
Two different types of controls are available, either an electro-
mechanical rotary knob switch assembly or one of the Cruisair
SMX series 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 specific needs of their boat and boating environment.
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 have
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
off to a sump or overboard. In humid climates the system can
produce a large amount of condensate water that could cause
significant damage to your boat if the drain system doesn’t
work properly.
Summary of Contents for DX Remote & Self-Contained A/C
Page 2: ......
Page 23: ...23 L 2086 Fig 12 Plenum Configurations Fig 11 Duct and Grill Sizes Tables ...
Page 24: ...24 L 2086 Fig 13a Switch Dimensions and Templates ...
Page 25: ...25 L 2086 Fig 13b Switch Dimensions and Templates ...
Page 26: ...26 L 2086 Fig 14 SHR5 16 StowAway Wiring 082611 Fig 15 SH24C StowAway Wiring 080264 ...
Page 30: ...30 L 2086 Fig 22 R F24 72 3 Ph Cond Unit Wiring 082556 Fig 23 SA3 Z Switch Wiring ...
Page 31: ...31 L 2086 Fig 25 PR3X Pump Relay Wiring Fig 24 SA5 Z Switch Wiring ...
Page 32: ...32 L 2086 Fig 26 PR8X Pump Relay Wiring Fig 27 WFAH System Wiring 115V ...
Page 33: ...33 L 2086 Fig 28 WFAH System Wiring 230V Fig 29 WFAH System Wiring 230V w Aux Heat ...
Page 35: ...35 L 2086 Fig 32 R F Type System Wiring SA3 Z Switch 3Ph ...
Page 36: ...36 L 2086 Fig 33 Refrigerant Charging Curves R22 ...
Page 38: ...NOTES ...
Page 39: ...NOTES ...
