E.) Center outer cabinet in window opening
and slide in so bottom flange is flush
against windowsill. Secure cabinet to
windowsill through holes provided in
cabinet bottom. Use appropriate fasteners
(not provided) for type of material you
are securing into. (See Figure 7).
F.) Lower window onto the outer cabinet top.
Do not apply excessive downward force
as the cabinet top could be damaged.
Leave a minimum 1/16” gap between front
of window sash and cabinet top flange.
This gap is required to install the front
panel. Locate and drill three holes through
the cabinet top into the center of the
window sash. Use appropriate fasteners
(not provided) for type of material you are
securing into.
G.) Precisely measure the remaining opening
on each side of cabinet and cut side trim
panels (provided) to fit. Affix weather
stripping on three sides.

Page 8

STEP 5 - INSTALLING THE HEATER

Use only factory supplied parts. Do not modify heater in any way.
WINDOW INSTALLATION
A.) Raise window - locate center.
B.) Heater requires level mounting surface,
framing may be necessary in window sill.
C.) Remove the 6 screws securing the back
of outer cabinet to intake and exhaust
tube flange and save (See Figure 5).
D.) Gently slide combustion tube assembly
forward and out of the outer casing
assembly (See Figure 6).

FIGURE 7

FIGURE 5

FIGURE 6

WOW403 /
WOW404
WOW253 /
WOW254