Specifications
4
B. The total Cross-Sectional Discharge Area of outlet
ducts from the Plenum Area under the Air Conditioner
must be as follows:
1. 579 & 600 Series; 17.5 sq. in.
2. 591, 595 & 630 Series; 21.0 sq. in.
C. Duct Sizing Requirements as follows:
Min. Max.
1. Duct Depth (591, 595 & 630 Series)1-1/2" 2-1/4"
(579 & 600 Series) 1-1/4" 2-1/4"
2. Duct Width 7.00" — — —
3. Total Duct Length 12 ft. 36 ft.
4. Duct Length (Short Run) 1/3 Total Length
D. Register Requirements as follows:
Min. Max.
1. Distance from Duct End 5" 8"
2. Distance from End of Elbow 15" —
3. Distance between Registers 24" —
4. Total Number Required/AC 4 8
5. Number required per Run/AC 2 —
6. Free Area per Register 14 sq. in. —
E. The Duct material must meet or exceed any agency
or RVIA Standard that may be in existence at the time
the RV is produced.
IT IS THE RESPONSIBILITY OF THE INSTALLER OF
THIS SYSTEM TO INSURE THE DUCT-WORK WILL
NOT COLLAPSE OR BEND DURING OR AFTER THE
INSTALLATION.
F. 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 or heat pump. This insulation
must be R-7 minimum.
G. Ducts and their joints must be sealed to prevent
condensation from forming on adjacent surfaces
during operation of the Air Conditioner.
NOTE
THE DOMETIC CORPORATION WILL NOT BE HELD
LIABLE FOR ROOF STRUCTURAL OR CEILING
DAMAGE DUE TO IMPROPERLY INSULATED OR
SEALED DUCT-WORK.
H. Return Air Opening must have 40 sq. in. minimum
free area including the filter.
I. Return Air to the Air Conditioner must be filtered to
prevent dirt accumulation on Air Conditioner
Cooling surface.
J. Total System Pressure must be between the following:
1. 0.55 to 0.90 in.W.C. for 579 Series
2. 0.40 to 1.10 in.W.C. for 591, 595 & 630 Series
3. 0.12 to 0.65 in W.C. for 600 Series
This is determined with the Air Conditioner Blower
operation on High Speed and Return Air Filter and
Grille in place.
4. AIR DISTRIBUTION SYSTEM
INSTALLATION
The Dometic Corporation recommends the basic configura-
tion shown below 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:
A. Duct size
B. Duct layout
C. Register size
D. Register locations
E. Thermostat location.
These items must be determined in conjunction with the Air
Distribution System Sizing and Design Requirements listed in
Section 3 of this manual.
ALTERNATE CONFIGURATIONS AND METHODS
MAY BE USED WHICH STILL ALLOW THE AIR CON-
DITIONER TO OPERATE PROPERLY. HOWEVER,
THESE ALTERNATE CONFIGURATIONS AND METH-
ODS MUST BE APPROVED BY THE DOMETIC COR-
PORATION IN WRITING.
The following instructions are based upon the use of
Dometic Return Air Kit No. 3105007 or 3105935. The
electronic control kit has mounting bolts supplied for use with
this Kit.
A. Before preparing the ceiling opening, the type of system
options must be decided upon. If a remote sensor is to be
used, provision must be made for it. If the load shed
option (Energy Management System feature) is to be
used, wires must be run from the load shed control to the
Dometic A/C. If a furnace is to be connected, wires must
be run from the furnace to the Dometic A/C. Read all of
the following instructions before beginning the in-
stallation.
B. ROOF AND CEILING OPENING PREPARATION
1) A 14" x 14" opening must be cut through the roof and
ceiling of the RV. This opening must be located
between the roof and reinforcing members.