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9
B After inspection, replace front cover and tighten
screws, then replace plastic decal shields.
B Fix the top vent cap on the top of the heater, as
shown in Fig. 8). Make sure the vent cap is well fitted
by taking special care that the front cover stays inside
the extended corners of the vent cap, as shown in
Fig. 8). The sides of the cover must be pressed with
your hands to ensure it fits inside those corners.
Secure it in place with its two screws.
Fig. 8
B The water heater is design certified for mounting on
a wall. Secure the wall mounting bracket provided
with the water heater to a wall surface. See Fig. 9.
B The installation method of the mounting bracket will
depend on what type of surface it’s being mounted
to. Due to the varying types of building surfaces, the
installer must decide on how best to support and
level the heater on an outside wall. It is always
recommended that horizontal or vertical support
boards or plywood sheathing (1/2” minimum) first be
attached to the wall surface. The heater must also be
kept level on the wall surface.
Fig. 9
Fig. 10
Vent Safety System
The 250 SXO will shut down if the intake or exhaust
louvers on the vent cap are blocked for any reason; see
troubleshooting section on page 19. See error code
table to confirm error, correct the problem and then
reset the heater before operating.
Warning: Do not mount heater directly
to vinyl siding. With vinyl siding
surfacing, a 6' x 4' area of the siding
must first be removed and then
replaced with wood or other non-plastic
made material. See Fig. 10.