Reznor OH Unit Installation Manual - Manual (Page 21)

Form I-OH, PN 120390 R5, Page 21
Location of Outer
Exhaust Door Panel
View with Outer Door
Panel Removed
Exhaust Box Cover
FIGURE 22 -
Exhaust Door Panel
(Illustration does not
show vent pipe. Vent
pipe is connected
to the collar on the
right.)
in the illustration) at the bottom of the panel. Using a straight screwdriver, remove
that screw.
On all models, remove the outer door panel by lifting upward and outward on the
handle. The exhaust box cover is now in view.
2. Remove the nuts that hold the exhaust box cover. Pull the cover directly forward off
the welded studs. Remove the two vertical pieces of woven gasketing. (The horizontal
gasket pieces are still attached to the vent pipe side of the opening.)
FIGURE 23 - Exhaust
Box Cover Removed
Heat Exchanger Tubes
3. On the end of the heater opposite the burner, remove the large outer door panel
(See FIGURE 24).
There is a screw (not shown in the illustration) at the bottom center of the panel.
Using a straight screwdriver, remove that screw.
While supporting the large panel, remove it by lifting upward and outward on the
handle. With the panel removed, the access door cover is exposed a shown in
FIGURE 24.
Be sure to provide sufficient support
for this large panel when removing it.
Outer Door Panel Removed Exposing the
Inner Combustion Chamber /Heat Exchanger
Access Cover
FIGURE 24 - Large
Door Panel and
Access Cover