Adb Component Dimensions; Placement Requirements - Dometic FreshJet3 Series Installation Manual

Rooftop Air Conditioner (Air Distribution Box, Wall Thermostat Controls)

4 .6 ADB component dimensions

This section provides the internal dimensions of the ADB
component.
e e
w
q
u u
i i
i i
o o
3 Dimension measurements
Front of unit
q
2.3 in. (58 mm)
w
23.0 in. (584 mm)
e
20.4 in. (518 mm)
r
Roof opening
t
EN
r r
u u
t
r r
y
a a
Center line of unit
y
11.6 in. (295 mm)
u
3.4 in. (86 mm)
i
6.0 in. (152 mm)
o
3.0 in. (76 mm)
a

4 .7 Placement requirements

This section describes factors to consider when placing
the rooftop component and the thermostat.
4 .7 .1 Planning the rooftop location
The rooftop component is specifically designed for
installation on the roof of an RV. To determine where to
place the rooftop component, consider these items.
• A 14.3 in. x 14.3 in. (363 mm x 363 mm)
[±0.1 in. (3 mm)] square opening and hereinafter
referred to as "roof opening" is required. The
roof opening is part of the return air system of
the rooftop component and must be finished in
accordance with NFPA 1192.
• The rafter/joist support frames must be spaced
no greater than 16.0 in. (406 mm) on center. The
rooftop component is designed to fit over an existing
roof vent opening.
• The distance between the roof and the RV ceiling
must be between 1.5 in. (38 mm) and 6.0 in.
(152 mm).
• When no roof vent is available or when another
location is desired, an opening must be cut through
the roof and ceiling of the RV. This opening must
be located between the roof reinforcing members.
Consider these recommendations along with your
cooling needs:
– For a single rooftop component: mount the
rooftop component slightly forward of the RV's
center (front to back) and centered from side to side.
– For two rooftop components: measuring from
the front of the RV and centering from side
to side, mount the first rooftop component
at 1/3 the length of the RV and the second
rooftop component at 2/3 the length of the RV.
4 .7 .2 Planning the thermostat location
The proper location of the thermostat is important to
ensure the unit provides a comfortable RV temperature.
To determine where to place the thermostat, consider
these items:
General information
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