7
4.
4.
4.
4.
4. AIR DISTRIB
AIR DISTRIB
AIR DISTRIB
AIR DISTRIB
AIR DISTRIBUTION SYSTEM
UTION SYSTEM
UTION SYSTEM
UTION SYSTEM
UTION SYSTEM
INST
INST
INST
INST
INSTALLA
ALLA
ALLA
ALLA
ALLATION
TION
TION
TION
TION
The Dometic Corporation recommends the basic con-
figuration shown below for installing this Air Conditioner
System. We have found by testing, that this configuration
works best in most applications of this Air Conditioner
System.
It is the responsibility of the Installer of this System to
review each RV floor plan and determine the following:
A. Duct size
B. Duct layout
C. Register size
D. Register locations
E. Thermostat location.
These items must be determined in conjunction with the
Air Distribution System Sizing and Design Requirements
listed in Section 3 of this manual.
ALTERNATE CONFIGURATIONS AND METHODS
MAY BE USED WHICH STILL ALLOW THE AIR
CONDITIONER TO OPERATE PROPERLY. HOW-
EVER, THESE ALTERNATE CONFIGURATIONS
AND METHODS MUST BE APPROVED BY THE
DOMETIC CORPORATION IN WRITING.
The following instructions are based upon the use of
The following instructions are based upon the use of
The following instructions are based upon the use of
The following instructions are based upon the use of
The following instructions are based upon the use of
Dometic Return Air Kit No. 3105007 or 3105935
Dometic Return Air Kit No. 3105007 or 3105935
Dometic Return Air Kit No. 3105007 or 3105935
Dometic Return Air Kit No. 3105007 or 3105935
Dometic Return Air Kit No. 3105007 or 3105935. The
electronic kit has mounting bolts supplied for use with this
Kit.
A.
A.
A.
A.
A. Before preparing the ceiling opening, the type of
system options must be decided upon. If a remote
sensor is to be used, provision must be made for it.
If the load shed option is to be used, wires must be run
from the load shed control to the Dometic A/C. If a
furnace is to be connected, wires must be run from
the furnace to the Dometic A/C. Read all of the
Read all of the
Read all of the
Read all of the
Read all of the
following instructions before beginning the in-
following instructions before beginning the in-
following instructions before beginning the in-
following instructions before beginning the in-
following instructions before beginning the in-
stallation
stallation
stallation
stallation
stallation.
B.
B.
B.
B.
B. ROOF AND CEILING OPENING PREPARATION
ROOF AND CEILING OPENING PREPARATION
ROOF AND CEILING OPENING PREPARATION
ROOF AND CEILING OPENING PREPARATION
ROOF AND CEILING OPENING PREPARATION
1) A 14" x 14" opening must be cut through the roof
and ceiling of the RV. This opening must be
located between the roof and reinforcing mem-
bers.
THERE MAY BE ELECTRICAL WIRING BETWEEN
THERE MAY BE ELECTRICAL WIRING BETWEEN
THERE MAY BE ELECTRICAL WIRING BETWEEN
THERE MAY BE ELECTRICAL WIRING BETWEEN
THERE MAY BE ELECTRICAL WIRING BETWEEN
THE ROOF AND THE CEILING. DISCONNECT ALL
THE ROOF AND THE CEILING. DISCONNECT ALL
THE ROOF AND THE CEILING. DISCONNECT ALL
THE ROOF AND THE CEILING. DISCONNECT ALL
THE ROOF AND THE CEILING. DISCONNECT ALL
POWER SUPPLIES AND THE POSITIVE (+ ) TERMI-
POWER SUPPLIES AND THE POSITIVE (+ ) TERMI-
POWER SUPPLIES AND THE POSITIVE (+ ) TERMI-
POWER SUPPLIES AND THE POSITIVE (+ ) TERMI-
POWER SUPPLIES AND THE POSITIVE (+ ) TERMI-
NAL FROM THE SUPPLY BATTERY. FAILURE TO
NAL FROM THE SUPPLY BATTERY. FAILURE TO
NAL FROM THE SUPPLY BATTERY. FAILURE TO
NAL FROM THE SUPPLY BATTERY. FAILURE TO
NAL FROM THE SUPPLY BATTERY. FAILURE TO
FOLLOW THIS INSTRUCTION MAY CREATE A SHOCK
FOLLOW THIS INSTRUCTION MAY CREATE A SHOCK
FOLLOW THIS INSTRUCTION MAY CREATE A SHOCK
FOLLOW THIS INSTRUCTION MAY CREATE A SHOCK
FOLLOW THIS INSTRUCTION MAY CREATE A SHOCK
HAZARD.
HAZARD.
HAZARD.
HAZARD.
HAZARD.
2) Mark a 14" x 14" square on the roof and carefully
cut the opening.
3)
Using the roof opening as a guide, cut the
matching hole in the ceiling.
4)
The opening created must be framed to provide
adequate support and prevent air from being
drawn from the roof cavity. Lumber 3/4" or more in
thickness must be used. Remember to provide an
entrance hole for power supplies, furnace wiring,
4-conductor telephone cable, remote sensing and
load shed options as desired.
5)
The 14" opening is part of the return air system of
the Air Conditioner and must be finished in accor-
dance with NFPA Standard 501C Section 2.7.
6)
Route a copper 12 AWG, with ground, 115 VAC
supply line from the fuse or circuit breaker box to
the roof opening.
a. This supply line must be located in the front
portion of the 14" opening.
b. The power supply MUST
MUST
MUST
MUST
MUST be on a separate 20
amp Time Delay Fuse or HACR Circuit Breaker.
c. Make sure at least 15" of supply wire extends
into the roof opening. This ensures easy con-
nection at the Junction Box.
d. Wiring must comply with all National, State and
Local Wiring Codes.
e. Use a steel sleeve and a grommet or equivalent
methods to protect the wire where it passes into
the opening.
7)
Route a dedicated 12 VDC supply line (18-22
AWG) from the RV's Converter or Battery to the
roof opening.
a. This supply line must be located in the front
portion of the 14" opening.
b. Make sure that at least 15" of supply wire
extends into the roof opening.
c. In a multiple zone installation, this wiring is
In a multiple zone installation, this wiring is
In a multiple zone installation, this wiring is
In a multiple zone installation, this wiring is
In a multiple zone installation, this wiring is
required in only one of the 14" openings
required in only one of the 14" openings
required in only one of the 14" openings
required in only one of the 14" openings
required in only one of the 14" openings.
8)
If a Remote Temperature Sensor is to be used
(Part No. 3106486.008), the connector end must
be routed to the roof opening of the system which
is till control. Make sure that at least 15" of the
sensor cable extends into the roof opening. Mount
the Remote Sensor in a location 54" above the
floor and away from any heat source in the area
that is to be controlled.
9)
If a furnace is to be controlled by the system, the
two furnace thermostat leads must be routed to
the roof opening of the air conditioner that will
control it. Make sure at least 15" of the furnace
thermostat wires extend into the roof opening.
10) If an Energy Management System (EMS) is to be
used with the control, two wires must be routed to
the roof opening of the zone to be managed. The
signal required for this function is a normally open
relay contact. When the EMS calls for the com-
pressor to shut off, the relay contacts should
close. Make sure that at least 15" of the EMS wires
extend into the roof opening.
