Instructions / Assembly

14
NOTICE:
Use of PVC cellular core (ASTM-F891), ABS Schedule 40, DWV
cellular core (ASTM –F628), or Radel® (polyphenylsulfone) in
non-metallic venting systems is prohibited.
The unit may be vented horizontally through a wall or vertically
through the roof. Pipe runs must be adequately supported along
both vertical and horizontal runs. Maximum unsupported span
is recommended to be no more than 3 feet. It is imperative that
the first hanger be located on the horizontal run immediately
adjacent to the first 90-degree elbow from the vertical rise or
at the blower outlet. The support method used should isolate
the vent pipe from floor joists or other structural members to
help prevent the transmission of noise and vibration. DO NOT
support, pin, or otherwise secure the venting system in a way
that restricts the normal thermal expansion and contraction of
the chosen venting material.
If the water heater is being installed as a replacement for an
existing power vented or power direct vented water heater, a
thorough inspection of the existing venting system must be
performed prior to any installation work. Verify that the correct
materials, as detailed above, have been used and that the
minimum or maximum vent length and terminal locations,
as detailed in this manual, have been met. Carefully inspect
the entire venting system for any signs of cracks or fractures,
particularly at the joints between elbows or other fittings and the
straight runs of vent pipe. Check the system for signs of sagging
or other stresses in the joints as a result of misalignment of
any components in the system. If any of these conditions are
found, they must be corrected in accordance with the venting
instructions in this manual before completing the installation
and putting the water heater into service.
Additional installation information for The Common wealth of
Massachusetts is located on the back page of this manual.
VENT PIPE CONNECTION
Refer to "Vent Pipe Connection Locations" Figure, for connecting
the vent pipe to the water heater. These models can be vented
either as a direct vent or as a power vent water heater.
NOTICE:
If the unit is installed as a power vent water heater, the vent
terminal with screen must still be installed on the inlet air side.
INSTALLATION
Before starting the vent installation, careful planning of
the routing and termination of vent and air inlet pipes can
reduce installation times. The length of the vent and air inlet
pipes should be kept to a minimum. Refer to the venting
charts in Table 1 for the pipe sizes and the total equivalent
length of pipe that can be used. DO NOT exceed the
equivalent length of pipe in the charts.
Depending on the size of pipe selected for venting the water
heater, it may be necessary to use a fitting for stepping up
to connect to the water heater. DO NOT step down pipe size
below the 2" pipe size. All models are shipped with 2" vent
terminals with screen. If another size of pipe is used for
venting the unit, the proper vent terminal must be installed.
When the unit is vented as a direct vent, through a side
wall, the vent terminals must be on the same exterior wall
mounted horizontally and maintain a minimum distance
between the centers of 15" (38.1 cm).
JOINING PIPES AND FITTINGS
All pipe, fittings, solvent cement, primers, and procedures,
must conform to American National Standards Institute and
American Society for Testing and Materials (ANSI/ASTM)
standards in the U.S. For Canada, all pipe, fittings, solvent
cement, primers, and procedures must conform to ULC-
S636 and vent manufacture specifications.
CEMENTING JOINTS
NOTICE:
All pipe, fittings, solvent cement, primers and procedures
must conform to American National Standards Institute and
American Society for Testing and Materials (ANSI/ASTM)
standards.
All joints in the vent piping must be properly sealed. Use of
the following material is recommended:
PVC materials should use ASTM D-2564 grade cement.
CPVC materials should use ASTM F-493 grade cement.
ABS materials should use ASTM D-2235 grade cement.
Cleaner-Primer and Medium Body Solvent Cement
1. Cut the pipe end square, removing all jagged edges and
burrs. Chamfer the end of the pipe, and, then, clean
the fitting socket and pipe joint area to remove all dirt,
grease, and moisture.
2. After checking pipe and socket for proper fit, wipe the
socket and pipe with cleaner-primer. Apply a liberal
coat of primer to the inside surface of the socket and
the outside of the pipe. DO NOT allow the primer to dry
before applying the cement.
3. Apply a thin coat of cement evenly in the socket. Quickly
apply a heavy coat to the pipe end. Insert the pipe into
the fitting with a slight twisting motion until it bottoms
out.
Blower Air Inlet
Connection
Noise Reducer
VENT PIPE CONNECTION LOCATIONS