Installation Preparation - Dometic 57908.321 Installation Instructions Manual

INSTALLATION INSTRUCTIONS
H.

Installation Preparation

1.  C heck gasket alignment of the unit over the
roof opening and adjust if necessary. Unit may
be moved from below by slightly lifting. See
(FIG. 10).
FIG. 10
Center Unit From Below
2. Remove return air cover and ceiling template
from carton. See (FIG. 11).
FIG. 11
Ceiling
Template
3. All models listed in this manual will use a four (4)
bolt pattern for installing the RAG kit.
4. Reach up into the return air opening and pull the
unit electric cord down for later connection. See
(FIG. 12).
Roof Gasket
Divider Plate
Return Air
Cover
Return Air
Grille
10
FIG. 12
Control
Wires
Gasket
Electrical
Cord
5. Hold the ceiling template up to the roof opening.
Make sure the large plate faces the rear of the
RV. See (FIG. 13).
a. Start each mounting bolt through the ceiling
template and up into the unit base pan by
hand. Install wood screw in each end of the
ceiling template. This ensures a tight fit of
the return air cover to ceiling. See (FIG. 13).
FIG. 13
Front Of Vehicle
Screws
b.  Tighten mounting bolts to
correct torque specifications. Overtighten-
ing could damage unit's base pan or ceiling
template. Not enough torque will allow an in-
adequate roof seal, and could cause a leak.
Tighten all four (4) mounting bolts EVENLY
with in 40 to 50 inch pounds. (FIG. 13)
 T his will compress the roof gasket to
approximately 3/4".
120 Vac
Power Supply
Roof
Gasket
Tighten To
Compress
Gasket To
3/4"