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INSTALLATION INSTRUCTIONS
FIG. 2
Good-Rafters
Do Not Cut Roof
Supported By
Structure Or
Cross Beams
Rafters
3/4" Min.
Leave Access For
Power Supply Wiring
C.
Air Distribution Duct Sizing & Design
The installer of this system must design the air distribution
system for their particular application. Several requirements
must be met for the unit to operate properly. These require-
ments are as follows:
1. Make sure ductwork will NOT
bend or collapse during and after installation,
and that it is correctly insulated and sealed.
Otherwise, damage to roof structure and ceiling
could occur.
2. All discharge air ducts must be properly insu-
lated to prevent condensation from forming on
their surfaces or adjacent surfaces during op-
eration of unit. This insulation must be R-7 mini-
mum. See (FIG. 3).
3. Ducts and their joints must be sealed to prevent
condensation from forming on adjacent surfaces
during operation of the unit.
4. Return air openings must have 40 square inches
minimum free area including the filter.
5. Return air to the unit must be filtered to prevent
dirt accumulation on unit cooling surface.
Good Location
Between Roof
Rafters
Frame Opening So It
Won't Collapse When
Bolting Down Unit
15" Min. At
Front Of
Opening
FIG. 3
Frame
Roof
(TOWARD BACK OF RV)
Duct
6. Air Distribution Installation
a. Dometic Corporation recommends the basic
configurations shown in (FIG. 4), (FIG. 5),
(FIG. 6), & (FIG. 7). We have found by test-
ing, that these configurations work best in
most applications. It is the responsibility of
the installer to review each RV floor plan to
determine the following:
● Duct size
● Duct layout
● Register size
● Register location
● Thermostat location
● Indoor Temperature Sensor Location
These items must be determined in conjunc-
tion with the Air Distribution Duct System
Sizing & Design requirements. See "C. Table
- Air Distribution Duct Sizing & Design" on
page (4).
I nstaller responsible for any necessary
adapters between unit and ductwork.
6
TOP VIEW
(BACK OF RV)
Frame
Roof Opening
Duct
Duct
Frame
SIDE VIEW
Roof Opening
Ceiling
Duct
Insulation
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