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9
Combustion air supply continued-
1. After selecting the proper location for the water heater, cut a 4” (10.2cm)
diameter hole through the floor and all other layers of flooring and
sheathing directly beneath the front center of the water heater.
2. Insert the air intake into the 4” (10.2cm) diameter hole and fasten to the
floor with the screws provided.
3. Adjust the air intake so the lower tube extends below the underside
sheathing and secure with the screws provided. THE BOTTOM OF THE
AIR INTAKE MUST BE AT LEAST 12” (30.5cm) ABOVE THE
GROUND LEVEL.
4. Seal the openings around the air intake and underside sheathing to resist
the entrance of rodents.
5. Position the water heater so it is centered above the air intake. (Note:
The water heater should also be centered with the openings in the
roof and ceiling to allow for correct assembly of the roof jack to the
flue tube.)
The water heater is to be secured in place using the supplied sheet metal
strapping and screws. Fasten the base of the water heater to the floor using
the screws provided. The perforated metal strapping must be fastened to the
top of the water heater and to the adjacent walls with the screws provided.
(See Figure 2)
Venting
Make certain the flue baffle is in place and centered in flue tube. Cut a 7 1/4
inch (18.5cm) diameter hole in the ceiling and roof directly above the flue of the
water heater. Center the water heater beneath the 7 1/4 (18.5cm) inch
diameter holes in the roof and ceiling for proper alignment of the flue tube and
roof jack vent. Apply non-hardening mastic on the roof, around the previously
cut hole, to form a weather seal with the flashing of the gas vent roof jack
assembly. Note: Only the roof jacks listed in Figure 2 can be used on this
water heater. Insert the 3” (7.62 cm) vent connector extension (shipped
telescoped) into the gas vent roof jack assembly and down onto the flue pipe
extruding from the top of the water heater. Fasten the 3” (7.62 cm) vent
connector to the flue pipe using the 3” (7.62 cm) clamp provided. After all
connections are made, apply a bead of silicone (supplied with vent kit) to all
vent seams and connections above the flue pipe (some kits may contain
silicone bands to seal vent joints).
WARNING
The vent system must be installed properly. Failure to properly install the
vent system could result in property damage, personal injury, or death.