6
579 & 595 Installation Instructions
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.
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
Return Air Cover Model 3105007 3308120
3105935 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.
Total 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. 595 Series 0.40 - 1.10 In. W.C. 595 Series
Filter & Grill In Place
Note: Duct sizes listed are inside dimensions.
AIR DISTRIBUTION
DUCT SIZING & DESIGN CHART
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