Air Distribution - Dometic Duo-Therm 57915.331 Installation Instructions Manual

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.
4. Air Distribution System Sizing & Design
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.
Return Air Cover Model
Roof Cavity Depth
Total Duct Cross Sectional Area
Duct Size
Depth
Width
Total Duct Length
Duct Length (short run)
Register Requirements
Number Required Per Run
Register Free Air Area
Distance From Duct End
Distance From Elbow
Total System Static Air Pressure
Blower at High Speed,
Filter & Grill In Place
Note: Duct sizes listed are inside dimensions.

AIR DISTRIBUTION

DUCT SIZING & DESIGN CHART
3105007
3105935
2.0 In. Min. - 5-1/2 In. Max.
21.0 Sq. In. Min.
1-1/2 In. Min. - 2-1/2 In. Max.
7.0 In. Min. - 10.0 In. Max.
15.0 Ft. Min. - 40.0 Ft. Max.
1/3 Total Duct Length
4 Min.
14.0 Sq. In.
5.0 In. Min. - 8.0 In. Max.
15.0 In.
0.55 - 0.90 In. W.C. 579 Series
0.40 - 1.10 In. W.C. 595 Series
6
579 & 595 Installation Instructions
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.
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 in FIG. 7A, 7B and 7C 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:
•
Duct size
•
Duct layout
•
Register size
•
Register location
•
Receiver location
Genesis Air Filtration System
2.0 In. Min. - 5-1/2 In. Max.
2.0 In. Min. - 2-1/2 In. Max.
8.0 In. Min. - 10.0 In. Max.
15.0 Ft. Min. - 40.0 Ft. Max.
1/3 Total Duct Length
5.0 In. Min. - 8.0 In. Max.
0.55 - 0.90 In. W.C. 579 Series
0.40 - 1.10 In. W.C. 595 Series
3308120
32.0 Sq. In. Min.
4 Min.
14.0 Sq. In.
15.0 In.