6
FRAME
14-1/4" (±1/8”)
OPENING
AC POWER
SUPPLY WIRE
DUCT
FRAME
DUCT
ROOF
INSULATION
DUCT
CEILING
DUCT
14-1/4" (±1/8”)
OPENING
INSULATION
SIDE VIEW
(TOWARD BACK OF RV)
TOP VIEW
(BACK OF RV)
LOW VOLTAGE WIRES:
12VDC
Furnace
Load Shed
Sensors
FRAME
CCC, CONTROL CABLE(S)
or 7-Wire Analog Cable
FIG. 7
4.
Air Distribution System Sizing & Design (See Chart
On Page 15)
The Installer of this air conditioner system must design
the air distribution system for this particular application.
Several requirements for this system MUST be met for
the air conditioner to operate properly. These require-
ments are as follows:
a.
The duct material must meet or exceed any
agency or RVIA Standard that may be in exist-
ence at the time the RV is produced.
b.
All discharge air ducts must be properly insu-
lated to prevent condensation from forming on
their surfaces or adjacent surfaces during op-
eration of the air conditioner. This insulation
must be R-7 minimum.
c.
Ducts and their joints must be sealed to prevent
condensation from forming on adjacent sur-
faces during operation of the air conditioner.
d.
Return air openings must have 40 square inches
minimum free area including the filter.
It is the responsibility of the installer to insure
the duct-work will not collapse or bend dur-
ing and after the installation. Dometic Corpo-
ration will not be liable for roof structural or
ceiling damage due to improperly insulated,
sealed or collapsed duct-work.
CAUTION
•
Duct size
•
Duct layout
•
Register size
•
Register location
•
Receiver location
These items must be determined in conjunction with the
Air Distribution System and Sizing and Design Require-
ments listed in the chart on page 15. Terminate the start
of the duct at the back edge of the 14-1/4" x 14-1/4" (±1/
8" opening)
Important:
Alternate configurations and methods
may be used which still allow the air conditioner to
operate properly; however, these alternate configura-
tions and methods must be approved by the Dometic
Corporation in writing. The following instructions are
based upon the use of Dometic Return Air Kits
3105007.XXX, 3105935.XXX, or 3308120.XXX Genesis
Air Filtration System. The 3107180.006 Bolt/Cover Kit
has the mounting bolts and cover for the AC junction
box for use with these kits.
D.
Wiring Requirements
1.
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 14-1/4" x 14-1/4" (±1/8") opening.
b.
The power MUST be on a separate 20 Amp time
delay or HACR circuit breaker.
c.
Make sure that at least 15" of supply wire
extends into the roof opening. This ensures
easy connection 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.
2. Route a dedicated 12 VDC supply line (18 -22 AWG)
from the RV's converter or battery to the roof open-
ing.
a. This supply line must be located in the front
portion of the 14-1/4" x 14-1/4" (±1/8") opening.
b. Make sure that at least 15" of supply wire
extends into the roof opening.
CAUTION
It is the responsibility of the installer of this
air conditioner system to ensure structural in-
tegrity of the RV roof. Never create a low spot
on the roof where water will collect. Water
standing around the air conditioner may leak
into the interior causing damage to the prod-
uct and the RV.
e.
Return air to the air conditioner must be filtered
to prevent dirt accumulation on air conditioner
cooling surface.
5.
Air Distribution System Installation
a.
Dometic Corporation recommends the basic
configuration shown on page 16, for installing
this air conditioner system. We have found by
testing, that this configuration works best in
most applications of this air conditioner sys-
tem. It is the responsibility of the Installer of this
system to review each RV floor plan and deter-
mine the following:
620615, 620625 & 620626 Installation & Operating Instructions
