Instructions / Assembly

10
Installing the water heater
Gas vent roof jack. — The roof jack is not
supplied with the water heater as a component
part. The roof jack must be one of the models
listed in this manual, and marked as approved
by Underwriters Laboratories, Inc. for use on
manufactured homes (mobile homes). The
installation instructions supplied with each roof
jack must be observed to obtain the proper
roof jack installation.
(See Illustration on page 9) The Gas Vent Roof
Jack Assembly (purchased separately) has a multi
piece telescopic vent connector pipe consisting of
an upper, center and lower section that must be
pre-adjusted according to the following directions
prior to final installation of the roof jack.
From the water heater location, measure the
distance from the highest point on roof opening
to the floor. Select correct size Roof Jack and
Air Inlet Assembly from Roof Jack Sizing Guide
on Page 9, Dimension X. Remove the Roof Jack
from its carton, and extend the center section of
the inner most pipe to its maximum length by
grasping the pipe and sliding the center section
of pipe downward. Then extend the lower section
of the inner pipe in the same manner to its full
extension. Silicone rubber sealing bands are
provided and must be pulled down over the joints
between the tubes to ensure a leak proof seal.
Apply a non-hardening mastic on the roof
around the previously cut hole to form a weather
tight seal with the roof flange of the Roof Jack
Assembly. Insert the roof jack through the opening
in roof from above, and fasten the flashing to
the roof using the pre-punched holes in the
flashing. (The roof flange adjusts to accommodate
installation on a pitched roof, maximum allowable
pitch is 5
1
/ 2 -12.
For roof pitches greater that 5
1
/ 2 -12, the use of
a ”wedge” under the roof flange is acceptable
provided it is sealed and secured.) Apply
additional non-hardening mastic as required to
complete the weather seal.
With Roof Jack in place and secured to the roof,
insure that the line on the larger, outer tube of the
Roof Jack, which is marked “INSTALL WITH
THIS LINE BELOW CEILING” is located no less
than 2” below the ceiling line and no less than six
inches above the water heater. Refer to page 9.
Now extend the lower section of the vent
connector pipe by grasping the center section
of pipe, ensuring that the silicone rubber seal
remains in position over the joint, and sliding the
lower section of pipe downward, over the flue
pipe protruding above the water heater’s top pan.
Be sure to leave approximately 1/16” to 1/8” of
flue pipe exposed below the lower section of
the vent connector pipe to ensure a good sealing
surface for the gasket. To complete the Roof Jack
Assembly installation, position the gasket material
(white fiberglass like material with self adhesive
tab, supplied in plastic bag on heater) and clamp
(supplied in carton with water heater) around the
intersection of the flue pipe and the lower section
of the vent connector pipe, and tighten the clamp
as required to provide a good seal at the joint.
Securing the water heater. — Secure the two
front legs of the water heater to the floor using
the 2 long screws furnished. Attach the bracket
(AP11154) to the top pan of the water heater
and fasten the bracket to the adjacent walls on
each side.