Wiring Requirements; Installing The Unit - Dometic 640312 Series Installation And Operating Instructions Manual

D. Wiring Requirements
1. Route a copper, with ground, 120 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 3.
Note: If vent fan was removed, the existing wire may be
used provided it is of proper size, location, and correctly
fused.
a. This supply wire must be located in the front
portion of the 14-1/4" x 14-1/4" (±1/8") open-
ing.
b The power MUST be on an appropriately
sized separate time delay fuse or circuit
breaker. The proper size protection can be
determined from the chart on page 3.
c. Make sure at least 15" of wire extends into
the roof opening. This will insure easy con-
nection to junction box.
d. Wiring MUST comply with the National Elec-
trical Code ANSI/NFPA-70 and CSA Stan-
dard C22.1 (latest edition) and any State or
Local Codes or regulations.
e. Protect the wire where it passes into the
opening with approved method. See para-
graph "d" above.
E. Placing The Unit On The Roof
PERSONAL INJURY HAZARD. This unit weighs
approximately 100 pounds. To prevent back
injury, use a mechanical hoist to place unit
on roof. Failure to obey this warning could
cause severe personal injury.
1. Remove the unit from the carton and discard car-
ton.
2. Place the unit on the roof.
3. Lift and place the unit over the prepared open-
ing using the gasket on the unit as a guide. See
FIG. 4.
PROPERTY DAMAGE HAZARD. Do not slide
the unit. Failure to obey this warning may
damage the neoprene gasket attached to the
bottom and create a leaky installation.
FIG. 4
4. Place the air distribution box kit inside the RV.
This box contains mounting hardware for the unit
and will be used inside the RV.
This completes the outside work. Minor adjustments can
be done from inside the RV if required.
F. Installing The Unit
1. Check gasket alignment of the unit over the roof
opening and adjust if necessary. Unit may be
moved from below by slightly lifting. See FIG. 5.
FIG. 5
Center Unit From Below
2. Remove air distribution box and mounting hard-
ware from the air distribution box kit carton.
3. Remove wire tie holding center of rear aluminum
bracket to plastic template.
4. Reach up into return air opening of the unit and
pull the unit electrical cord down for later connec-
tion. See FIG. 6.
FIG. 6
Reach Up Into The Return Air Opening
And Pull Down The Unit Electrical Cord
6
Lift And Place
FRONT
Do Not Slide
Roof Gasket