Wiring Requirements; Placing Unit On Roof - Dometic BR342 Installation And Operating Manual

INSTALLATION INSTRUCTIONS
2. Roof vent removal
a. Unscrew and remove the roof vent.
b. Remove all caulking compound around
opening.
c. Seal all screw holes and seams where the
roof gasket will be located. Use a good grade
of all weather sealant.
d. ,I WKH RSHQLQJ H[FHHGV
will be necessary to re-size the opening. See
"B. Roof Requirements" on page (4).
e. ,I WKH RSHQLQJ LV OHVV WKDQ
must be enlarged. See "B. Roof Requirem-
ents" on page (4) .
3. New opening
a. Carefully mark and cut the required roof
opening. See "B. Roof Requirements" on
page (4).
b. Using the roof opening as a guide, cut the
matching hole in the ceiling.
c. Maintain structural integrity.
Otherwise damage to product and/or RV
could occur.
d. NEVER create a low spot on
RV roof. Otherwise, water will pool and could
cause a leak.
e. The opening created must be framed to pro-
vide adequate support and prevent air from
being drawn from the roof cavity. Framing
VWRFN
19.05 mm
used. Remember to provide an entrance h-
ole for power supplies at the front of the o-
pening. See (FIG. 3).
FIG. 3
Good-Rafters
Do Not Cut Roof
Supported By
Structure Or
Cross Beams
Rafters
19.05 mm
Leave Access For
Power Supply Wiring
346mm X 346mm
352mm X 352mm it
RU PRUH LQ WKLFNQHVV PXVW EH
Good Location
Between Roof
Rafters
Frame Opening So It
Won't Collapse When
Bolting Down Unit
381 mm Min. 381 mm Min. 381 mm Min.
At Front Of At Front Of At Front Of
Opening Opening Opening
C.

Wiring Requirements

1. Route a copper, with ground, 240 Vac supply
wire from the time delay fuse or circuit breaker
box to the roof opening. The proper size wire
can be determined from chart on page 4.
 LW
a. This supply wire must be located in the front
portion of the roof opening.
b. The power MUST be on an appropriately
sized separate time delay fuse or circuit
breaker. The proper size protection can be
determined from data table on page 4.
c. 0DNH VXUH WKDW DW OHDVW
ire extends into the roof opening. This insu-
res an easy connection at the junction box.
d. Protect the wire where it passed into the
opening with approved method.
D.

Placing Unit On Roof

1. Remove the unit from the carton and discard
carton.
2.
lifting technique and control when lifting product.
The rooftop unit weighs approximately 35 kg.F-
ollow occupational health of safety guide when
lifting or moving the unit. Failure to obey this ca-
ution could result in injury. Place unit on the roof.
3. Do NOT slide unit. Otherwise,
damage to gasket (on bottom of unit) may occur,
and could cause a leak.
Lift and place the unit over the prepared open-
ing using the gasket on the unit as a guide. See
(FIG. 4).
FIG. 4
5
I f vent fan was removed, the existing wire
may be used provided it is of proper size,
location, and correctly fused.
381mm
LIFTING HAZARD.
RI VXSSO\ Z
Use proper
Lift And Place
Front
Do Not Slide