Installation; Installing And Wiring The Thermostat And Optional Sensor - Dometic FreshJet3 Series Installation Manual

Rooftop air conditioner (air distribution box, wall thermostat controls)
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12 Return Air Opening
Wiring harness
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3. Reach up into the return air opening of the rooftop
component and pull down the rooftop component's
electrical cord and wiring harness.
4. If the rooftop component has a built-in board,
complete the following:
a. Mount the junction box to the framing in front
of the roof opening, using the installer-supplied
screws.
b. Install the strain relief.

7 Installation


WARNING: FIRE OR ELECTRICAL SHOCK
HAZARD . Failure to obey these warnings
could result in death or serious injury .
• Shut off the gas supply, disconnect the 115 VAC
power from the RV, and disconnect the positive
(+) 12 VDC terminal from the supply battery before
drilling or cutting into the RV.
• Provide grounding in compliance with all applicable
electrical codes.
This section describes how to install and mount the wall
thermostat and optional sensor.
7 .1 Installing and wiring the
thermostat and optional sensor
To install the wall thermostat, choose one of the
following options based on the type of wiring.
EN
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Ceiling thickness
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• "Using Independent RJ-45 Wire to Supply
Communication to the Thermostat" on page 15,
or
• "Using RV-C BUS and Multiplexer to Supply CAN
Communication to the AC" on page 16.
7 .1 .1 Using Independent RJ-45 Wire to
Supply Communication to the Thermostat
I If installing non-RJ-45 wiring, go to "Using RV-C BUS
and Multiplexer to Supply CAN Communication to
the AC" on page 16.
T-568B
T-568B
T-568A
13 Connecting the RJ-45 plugs to the communication cable(s)
Pin 1
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1. Terminate the previously run 8-conductor
communication cable with two RJ-45 plugs
using a crimping tool. Refer to the crimping tool
manufacturer for instructions. See "Routing the
thermostat communication cable" on page 12.
T-568A
The pins of both RJ-45 plugs must match: pin 1
I
must connect to pin 1 on the other connector, pin 2
must connect to pin 2 on the other connector, and
continuing for all remaining pins. Pins 3 and 6 must be
twisted at minimum rate of 25 twists per 39 in. (1 m).
Installation
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T-568B
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T-568B
T-568A
T-568A
15