Dometic FreshJet3 Series Installation Manual page 13

Rooftop air conditioner (air distribution box, wall thermostat controls)
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q q
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9 RV structure
Air conditioner
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Thermostat
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Furnace (optional)
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Thermostat
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communication cable
3. If you use more than one rooftop component
to manage multiple zones with an INC1015RD
thermostat, you must also complete the following
actions:
a. Route an additional 8-conductor, RJ-45
communication cable to the roof opening for
each additional rooftop component.
For RV-C bus communication, where a multiplexer
will control multiple air conditioner devices:
route two 18 to 22 AWG conductors from the bus
to the roof opening of each AC.
b. Make sure that at least 15.0 in. (381 mm) of the
wire extends into the roof opening.
4. Protect all the wires where they pass into the
opening, according to local and national standards.
EN
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r r
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e e
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Breaker box
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12 VDC input
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Temperature sensor
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(optional)
Furnace wires
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6 .4 .4 Routing the furnace wire
Use of furnace 12 V wire for the 12 V supply of the
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AC control board is not approved.
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If your system includes a gas furnace, you must complete
the following steps:
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1. Route two 18 AWG wires from the furnace to the roof
opening of the rooftop component that will control
the furnace.
2. If your system will use more than one furnace, route a
second set of 18 AWG wires from the second furnace
to the second rooftop component.
6 .4 .5 Routing the indoor temperature
sensor wire (optional)
If your system includes an indoor temperature sensor,
you must complete the following actions:
1. Route the optional indoor temperature sensor wire
from the roof opening to the indoor temperature
sensor location.
2. Route the 2-pin connector end of the wire to the roof
opening.
3. Follow the indoor temperature sensor's installation
instructions for proper installation.
6 .4 .6 Routing the load shed wire
(optional)
If you will use an Energy Management System (EMS),
or load shed feature, with the thermostat, you must
complete the following:
1. Route two EMS wires to the roof opening of the zone
to manage.
2. Terminate each wire with a 2-pin Molex Mini-Fit Jr.
receptacle.
I The signal normally required for this function is an
open relay contact. When the EMS calls for the
compressor to shut off, the relay contacts should
close.
3. Make sure that at least 15.0 in. (381 mm) of the EMS
wire extends into the roof opening.
Pre-installation
13