Dometic B3351.531 Installation & Operating Instructions Manual page 8

E. Install junction box cover with two (2) #10 x 10mm blunt
point screws. See FIG. 14.
F. Plug air conditioners electrical cord into the mating
connector on control box.
INSTALL AIR BOX
A. Remove return air grille from air box by pulling in on half-
round finger catches.
B. Hold air box up to ceiling template and install three (3)
#10 x 10mm screws at air box mounting point. See FIG.
15.
FIG. 15
C. Snap hole plug into place at rear of air box. See FIG. 16.
FIG. 16
Wood
Screw
Hole Plug
D. Install four (4) #8 x 16mm wood screws that hold air box
tight to ceiling. Hand tighten to prevent stripping of the
of the screw in the ceiling. Do Not Use a power screw
driver. See FIG. 16 & 17.
FIG. 17
Do Not Use Power Screw Driver To
Tighten Wood Screws
INSTALLATION AND OPERATING INSTRUCTIONS
Install 3 Screws In to
Metal Template
Wood
Screw
E. In the event that the wood screws used to hold the
plastic air box to the ceiling do not grip or strip in the
ceiling material, four ceiling hollow wall anchors can be
used.
F. Remove the plastic air box and drill 8mm diameter holes
in the location of the 4 screws. Install the hollow wall
anchors (not supplied and follow manufacturers hollow
wall anchor installation instructions). See FIG. 18.
FIG. 18
Hollow Wall Anchor
Compressed
G. Reinstall the plastic air box.
H. Place 2 wires on top of the foam filter pad from corner
to corner before placing the grill assembly into the air
box. Reinstall return air grille and filter into air box. See
FIG. 19.
FIG. 19
Filter Grill
I. The air conditioner installation is now complete. Turn on
power to the unit for operational check. Please read
Unit Operating Instructions before proceeding.
8
Hollow Wall
Anchor
Ramset
HWD5M4
Place 2 Wires
From Corner To
Corner