6
4. AirDistributionSystemSizing&Design (SeeChart
OnPage 7)
TheInstallerofthis airconditionersystemmustdesign
theairdistributionsystemforthisparticularapplication.
SeveralrequirementsforthissystemMUSTbemetfor
the air conditioner to operate properly. These require-
ments are as follows:
a. The duct material must meet or exceed any
agencyorRVIAStandardthatmaybeinexist-
ence at the time the RV is produced.
b. All discharge air ducts must be properly insu-
latedtopreventcondensationfromformingon
their surfaces or adjacent surfaces during op-
eration of the air conditioner. This insulation
must be R-7 minimum.
c. Ductsandtheirjointsmustbesealedtoprevent
condensation from forming on adjacent sur-
facesduringoperationoftheairconditioner.
d. Returnairopeningsmusthave40squareinches
minimumfreeareaincludingthefilter.
5. Air Distribution System Installation
a. Dometic Corporation recommends the basic
configurationshownonpage8,forinstallingthis
airconditionersystem.Wehavefoundbytest-
ing, that this configuration works best in most
applicationsofthisairconditioner system. It is
theresponsibility oftheInstallerofthis system
torevieweachRVfloorplananddeterminethe
following:
•Duct size
•Duct layout
•Registersize
•Registerlocation
•Thermostatlocation
Theseitemsmustbedeterminedinconjunctionwiththe
AirDistributionSystemandSizingandDesignRequire-
ments listed in the chart on page7.Terminatethestart
oftheductatthebackedgeofthe14-1/4"x 14-1/4"(±1/
8"opening)
Important: Alternate configurations and methods
may be used which still allow the air conditioner to
operate properly; however, these alternate configura-
tions and methods must be approved by the Dometic
Corporation in writing. The following instructions are
based upon the use of Dometic Return Air Kits
3105007.XXX, 3105935.XXX, or 3308120.XXX Genesis
Air Filtration System. The 3107180.006 Bolt/Cover Kit
has the mounting bolts and cover for the AC junction
box for use with these kits.
D. Wiring Requirments
1. Route a copper 12 AWG, with ground, 115 VAC
supplylinefromthefuseorcircuitbreakerboxtothe
roofopening.
a. This supply line must be located in the front
portionofthe14-1/4"x14-1/4"(±1/8")opening.
b. ThepowerMUSTbeonaseparate20amptime
delayfuseor HACR circuitbreaker.
c. Make sure that at least 15" of supply wire
extends into the roof opening. This ensures
easy connection at the junction box.
d. WiringmustcomplywithallNational,Stateand
LocalWiring Codes.
e. Useasteelsleeveandagrommetorequivalent
methodstoprotectthewirewhereitpassesinto
theopening.
2. Routeadedicated12VDCsupplyline(18-22AWG)
fromtheRV'sconverterorbatterytotheroofopen-
ing.
a. This supply line must be located in the front
portionofthe14-1/4"x14-1/4"(±1/8")opening.
b. Make sure that at least 15" of supply wire
extendsinto theroofopening.
c. Inamultiplezoneinstallation,thiswiringis
requiredinonly oneof the14-1/4"x14-1/4"
(±1/8")openings.
FRAME
14-1/4" (±1/8”)
OPENING
AC POWER
SUPPLY WIRE
DUCT
FRAME DUCT
ROOF
INSULATION
DUCT CEILING
DUCT
14-1/4" (±1/8”)
OPENING
INSULATION
SIDE VIEW
(TOWARD BACK OF RV)
TOP VIEW
(BACK OF RV)
LOW VOLTAGE WIRES:
12VDC
Furnace
Load Shed
Sensors
FRAME
CCC, CONTROL CABLE(S)
or 7-Wire Analog Cable
FIG. 7
It is the responsibility of the installer to insure
the ductwork will not collapse or bend during
andaftertheinstallation.DometicCorporation
will not be liable for roof structural or ceiling
damage due to improperly insulated, sealed
or collapsed ductwork.
CAUTION
CAUTION
It is the responsibility of the installer of this
air conditioner system to ensure structural
integrity of the RV roof. Never create a low
spot on the roof where water will collect. Wa-
ter standing around the air conditioner may
leak into the interior causing damage to the
product and the RV.
e. Returnairtotheairconditionermustbefiltered
toprevent dirt accumulationonair conditioner
coolingsurface.
620515, 620525, 620526, 630515 & 630516 Installation Instructions
