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INSTALLATION INSTRUCTIONS
A.
Choosing Proper Location For Unit
This unit is specifically designed for installation on the roof
of an RV. When determining your cooling requirements, the
following should be considered:
●
Size of RV;
●
Window area (increases heat gain);
●
Amount of insulation in walls and roof;
●
Geographical location where the RV will be
used;
●
Personal comfort level required.
1. For one unit installation: The unit should be
mounted slightly forward of center (front to back)
and centered from side to side.
2. For two unit installations: Install one unit 1/3 and
one unit 2/3's from front of RV and centered from
side to side.
It is preferred that the unit be installed on a relatively flat
and level roof section measured with the RV parked on a
level surface. See table below for maximum acceptable tilt.
Model
Number
H541815A
H541816A
H541915A
H541916A
H551816A
H551916A
3. After Location Has Been Selected:
a. Check for obstructions in the area where unit
will be installed. See (FIG. 1).
FIG. 1
Dimensions Are Nominal
13-7/8"
40"
4"
Center Line Of Unit
Keep These Air
Flow Areas Free
Of Obstructions
18"
Max Tilt
(All Directions)
15°
30"
Roof Opening
Front
4"
b. Maintain structural integrity.
Otherwise damage to product and/or RV
could occur.
The roof must be designed to support 130
pounds when RV is in motion. Normally
a 200 lb. static load design will meet this
requirement.
B.
Roof Preparation
1. FIRE OR ELECTRICAL SHOCK
HAZARD. Make sure there are no obstacles
(wires, pipes, etc.) inside RV's [roof / floor /
walls]. Shut OFF gas supply, disconnect 120
Vac power from RV, and disconnect positive (+)
12 Vdc terminal from supply battery BEFORE
drilling or cutting into RV. Failure to obey these
warnings could result in death or serious injury.
O pening Requirements - Before preparing
the ceiling opening, the type of system op-
tions MUST be decided upon. Read all of
the following instructions before beginning
the installation.
2. Carefully mark and cut the required roof opening.
See "B. Roof Requirements" on page (4).
3. Using the roof opening as a guide, cut the match-
ing hole in the ceiling.
4. Maintain structural integrity. Oth-
erwise damage to product and/or RV could oc-
cur.
NEVER create a low spot on RV
roof. Otherwise, water will pool and could cause
a leak.
The opening created must be framed to provide
adequate support and prevent air from being
drawn from the roof cavity. Framing stock 3/4"
or more in thickness must be used. Remember
to provide an entrance hole for power supplies,
indoor temperature sensor (if applicable), ther-
mostat communication cable, and furnace wires
(if applicable) at the front of the opening. See
(FIG. 2).
5
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