Dometic DX Remote & Self-Contained A/C, Инструкция по установке и эксплуатации

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English L-2086 Installation
Plenums, or transition boxes are used with flexible ducting to
split and route the discharge air as needed. Figure 12 shows
several plenum configurations.
• Ducting must be properly sized for the airflow. If the duct run is
longer than 10 feet (3m), use the next larger duct size.
• Use of insulated duct is recommended, and is mandatory
when used in high heat areas or where condensation would
be a problem.
• Run flexible ducting tightly and smoothly, with as few bends
as possible.
• Keep ducts as short as possible.
• Support ducting to prevent sagging during boat operation.
• Trim excess ducting before attaching to transition adapters.
• Make sure ducting is not crushed or kinked.
• Use a flexible transition duct between blower and any built-
in ducting.
• If possible, rotate blower to keep duct run as short and
direct as possible.
Discharge Air Grill
When used with flexible ducts, a grill plenum should be incor-
porated behind the discharge grill. Location of this grill should
be as high as possible in the cabin, and oriented so that air
flow between discharge and return encompasses as great an
area as possible in the cabin. Care should be taken to avoid
“short cycling,” a situation where the conditioned air is returned
to the coil without being substantially affected by the cabin air.
Installing the Control Unit
The SMX Control
If your system has SMX controls, refer to the appropriate SMX
II or SMX Net Control System Installation/Operation Manual.
The Rotary Knob Switch Assembly
The following instructions apply to both self-contained and
remote condensing unit systems using a rotary-knob switch
assembly.
Warning
The rotary knob switch assembly switches line voltage
(115 or 230VAC) and in many case full power of the unit.
The selected mounting location must be safe in regards
to voltage as well as heat produced by the switch as-
sembly.
Location
The switch assembly should be mounted on a vertical bulk-
head where it can easily be seen and reached. There should
be rear access with sufficient clearance for the wiring and the
protective cover. The thermostat bulb is on a 10 ft (3m) long
capillary tube, and the switch assembly must be installed close
enough to the unit so the bulb can be mounted in the return air
path.
Remote condensing systems use SA type switches which
have terminal strips that must be mounted to the back of the
bulkhead where all field wiring terminates. This location must
be easily accessible for wiring connections and service.
One and two-knob slave switch assemblies should be installed
in the cabin where the slave cooling unit is operating.
Mounting
Cut a hole in the bulkhead using the template shipped with the
switch, or one from the back of this manual. See Figures 13a
and 13b for templates and switch dimensions.
Attach the terminal strip to an accessible location on the back
of the bulkhead (remote systems only). Self-contained systems
have a 10-foot (3m) harness with a plug that connects to the
self-contained unit.
Carefully route the thermostat bulb from the switch to the
return air path of the unit so the capillary tube does not get
kinked. The large bulb must sense the return air, and not touch
the evaporator coil. If a second smaller “anticipator” bulb is
attached to the main bulb, it should be installed into the dis-
charge duct.
After making all wire connections, install the protective plastic
cover (remote systems only) over the terminal strip. Next install
the plastic cover over the back of the switch assembly (remote
and self-contained systems) and mount the switch to the bulk-
head with the 4 screws provided.
Installing the Pump Relay
The following instructions apply to both self-contained and
remote condensing unit systems that have multiple A/C units
served by a single seawater pump. If you only have one A/C
unit, or each unit has it’s own seawater pump, then skip to the
next section.
Location
The pump relay is generally located in the engine room near
the seawater pump, but it can be mounted anywhere that is
convenient and accessible. It must be in a dry location, away
from any possible water spray, with room for some heat dissi-
pation.