6
INSTALLATION INSTRUCTIONS DUCTED CCC
4. AIR DISTRIBUTION SYSTEM
SIZING & DESIGN
The Installer of this air conditioner/heat pump system must design the air distribution system for their particular application. Several
requirements for this system MUST be met for the air conditioner/heat pump to operate properly. These requirements are as
follows:
A.
The duct material must meet or exceed any agency or RVIA Standard that may be in existence at the time the RV is produced.
B.
All discharge air ducts must be properly insulated to prevent condensation from forming on their surfaces or adjacent surfaces
during operation of the air conditioner/heat pump. This insulation must be R-7 minimum.
C.
Ducts and their joints must be sealed to prevent condensation from forming on adjacent surfaces during operation of the air
conditioner/heat pump.
D.
Return air openings must have 40 square inches minimum free area including the filter.
E.
Return air to the air conditioner/heat pump must be filtered to prevent dirt accumulation on air conditioner/heat pump cooling
surface.
It is the responsibility of the installer to in-
sure the ductwork will not collapse or bend
during and after the installation. Dometic
Corporation will not be liable for roof struc-
tural or ceiling damage due to improperly in-
sulated, sealed or collapsed ductwork.
Return Air Cover Model
3105007.XXX
3308120.XXX
3105935.XXX
Genesis Air Filtration System
Roof Cavity Depth
2.0 In. Min. - 5-1/2 In. Max.
2.0 In. Min. - 5-1/2 In. Max.
Duct Cross Sectional Area
21.0 Sq. In. Min.
32.0 Sq. In. Min.
Duct Size
Depth
1-1/2 In. Min. - 2-1/2 In. Max.
2.0 In. Min. - 2-1/2 In. Max.
Width
7.0 In. Min. - 10.0 In. Max.
8.0 In. Min. - 10.0 In. Max.
Total Duct Length
15.0 Ft. Min. - 40.0 Ft. Max.
15.0 Ft. Min. - 40.0 Ft. Max.
Duct Length (short run)
1/3 Total Duct Length
1/3 Total Duct Length
Register Requirements
Number Required Per Run
4 Min.
4 Min.
Register Free Air Area
14.0 Sq. In.
14.0 Sq. In.
Distance From Duct End
5.0 In. Min. - 8.0 In. Max.
5.0 In. Min. - 8.0 In. Max.
Distance From Elbow
15.0 In.
15.0 In.
Total System Static Air Pressure
0.55 - 0.90 In. W.C. 579 Series
0.55 - 0.90 In. W.C. 579 Series
Blower at High Speed,
0.40 - 1.10 In. W.C. 590, 591, 595 Series 0.40 - 1.10 In. W.C. 590, 591, 595 Series
Filter & Grill In Place
0.12 - 0.65 In. W.C. 600, 630 Series
0.12 - 0.65 In. W.C. 600, 630 Series
Note: Duct sizes listed are inside dimensions.
AIR DISTRIBUTION
DUCT SIZING & DESIGN CHART
CAUTION
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