atwood Air Conditioners (13500, 15000) - Manual (Page 3)

Unit Installation (Non-Ducted)
Before beginning, mark out the position of the
unit considering the following important
requirements:
- The air conditioner should be situated as
centrally as possible on the vehicle, to ensure
even air distribution.
- The front of the unit
MUST face the
direction of travel; failure to follow this
instruction will result in damage to the
condenser fans.
- If the vehicle is over 23’ in length, or has an
unusually high heat load (see General
Operating Information section regarding
expectations about insulation etc.), Atwood
would recommend 2 or more units to cool
effectively.
- When considering the installation position
remember to check for clearance around the
plenum inside the vehicle.
- Avoid an installation position where a
bulkhead, cupboard or light fitting could
interfere with the discharge air flow from the
plenum.
It is important that the unit is never
more than 5°from the horizontal and
the rear of the unit should never be
higher than the front.
- Contact Atwood if your installation
differs significantly.
ASSESS ROOF STRENGTH
- The roof members MUST be strong enough
to support the weight of the unit 99 lbs
(45kg) without any roof deflection that will
cause “pooling” of water around the unit.
Contact your RV manufacturer to confirm
the max load the roof is able to handle. If in
any doubt consider the use of an external
“H” frame.
- If the roof does not have an existing hole
one must be cut. Cut from the roof then use
the roof hole as a guide to cut through the
ceiling. Contact your RV manufacturer for
the best method to cut through the roof.
- The square hole in the roof (356 x 356mm,
14” x 14”)
MUST be boxed up with minimum
3/4 inch square timber to provide a structure
strong enough to withstand the compression
of the installation bolts. This is also to ensure
that air in not drawn from the roof cavity
(Fig 3 & 4). Remember to leave access for
wiring.
- Longitudinals
MUST be fixed securely to the
transverse roof members to transfer load
(see Fig 3).
- The above outline on the left shows the minimum clearance required around the
ATWOOD unit on the roof of the vehicle, distances shown are calculated from a
14” square hole (356 x 356mm)
- The above outline on the right shows the minimum clearance required around
the Plenum located on the ceiling inside the vehicle, distances shown are
calculated from a 14” square hole (356 x 356mm)
.79 MIN