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

Installation

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.
8 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.
8 .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.
• "Using RJ-45 Wire to Supply Communication to the
Thermostat" on page 16, or
• "Using RV-C BUS and Multiplexer to Supply CAN
Communication to the AC" on page 17.
8 .1 .1 Using RJ-45 Wire to Supply
Communication to the Thermostat
I If installing non twisted pair cable, go to "Using
RV-C BUS and Multiplexer to Supply CAN
Communication to the AC" on page 17.
16
Rooftop Air Conditioner (Air Distribution Box, Wall Thermostat Controls)
T-568B
T-568B
T-568A
13 Connecting the RJ-45 plugs to the communication cable(s)
Pin 1
q
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 13.
T-568A
I The pins of both RJ-45 plugs must match: pin 1
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).
q q
T-568B
q q
T-568B
T-568A
T-568A
EN