Installing The Electronic Control Box; Configuring The Electronic Control Box - Dometic FreshJet3 Series Installation Manual

Installation
2. Insert the top edge of the display into the cutout.
3. Applying pressure over the Dometic logo, push the
bottom edge of the display until the entire display is
flush with the edges of the cutout. The display should
fit tightly into the cutout.
4. To install the optional indoor temperature sensor,
refer to the instructions provided with the indoor
temperature sensor.
8 .2 Installing the electronic control
box
This section describes how to connect the power supply
and low-voltage wiring to the electronic control box.
8 .2 .1 Connecting the 115 VAC power
supply to the junction box
1. Route the previously run 115 VAC power supply wire
from the rooftop component through a strain relief
and into the junction box.
2. Tighten the strain relief making sure not to damage
the wires. Leave enough wire inside the junction
box to connect to the rooftop component's 115 VAC
wires.
3. Connect the white neutral wires together, using
appropriately-sized connectors.
4. Connect the black live wires to each other, using
appropriately-sized connectors.
5. Connect the bare copper wire to the green/yellow
wire, using appropriately-sized connectors.
6. Ensure the connectors to the 115 VAC power supply
wire are secured so they do not vibrate loose.
8 .2 .2 Connecting the low voltage wire to
the electronic control box
NOTICE: Make sure the positive (+) 12 VDC terminal
is disconnected from the supply battery. Otherwise,
damage to the unit could occur.
1. If using independent RJ-45 wire:
a. Connect the previously run (+) 12 VDC supply
wire protruding from the roof opening to the
(+) 12 VDC red wire at the electronic control box.
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Rooftop Air Conditioner (Air Distribution Box, Wall Thermostat Controls)
b. Connect the previously run (–) 12 VDC supply
wire protruding from the roof opening to the
(–) 12 VDC black wire at the electronic control
box.
2. If using the RV-C BUS and multiplexer, plug the 4-pin
receptacle into the 4-pin plug labeled CAN-BUS on
the electronic control box. See "Using RV-C BUS and
Multiplexer to Supply CAN Communication to the
AC" on page 17.
3. Connect the previously run furnace thermostat wires
protruding from the roof opening (if applicable) to
the blue wires at the electronic control box. The
polarity of these connections does not matter.
4. If you performed "Using RJ-45 Wire to Supply
Communication to the Thermostat" on page 16,
plug the RJ-45 cable into either RJ-45 jack on the
electronic control box labeled as CAN/CMC. If more
than one zone is used, the second jack is used to join
each additional zone.
5. Plug the indoor temperature sensor cable (if
applicable) into the 2-pin plug labeled ROOM
SENSOR on the electronic control box.
6. If equipped with an Energy Management System,
terminate the previously run Energy Management
System wires with a 2-pin Molex Mini-Fit Jr.
receptacle.
7. Plug the 2-pin Molex Mini-Fit Jr. receptacle into the
2-pin plug labeled as LOAD SHED on the electronic
control box. The polarity of this connection does not
matter.
8 .3 Configuring the electronic
control box
This section describes how to set the DIP switches for
your unit's electronic control box and to complete the
system reset.
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