Install Instructions

25
VERTICAL TERMINATION INSTALLATION
1. Determine the location for the termination(s).
2. If installing only the vent (exhaust) piping in a Power Vent
conguration vertically through the roof; ensure that all
exterior vertical clearance requirements shown in Figure 22
and Figure 23 on page 26 are being maintained. These
clearances and those cited by local and national codes must
be maintained.
NOTE: On at roof installations the vent termination must be
a minimum of 24 inches (60 cm) above any parapet, vertical
wall or structure within 10 feet (3 m) horizontally. See Figure
23 on page 26.
3. If installing both intake air and vent piping in a Direct Vent
conguration vertically through the roof; ensure that all
exterior vertical clearance requirements shown in Figure 22
and Figure 23 on page 26 are being maintained. These
clearances and those cited by local and national codes must
be maintained.
NOTE: On at roof installations the intake air and the vent
terminations must be a minimum of 24 inches (60 cm) above
any parapet, vertical wall or structure within 10 feet (3 m)
horizontally. See Figure 23 on page 26.
4. If installing only vent piping in a Power Vent conguration vertically
through the roof the following instructions must be followed:
The vent termination must be oriented facing downward as
shown in Figure 22 and Figure 23 on page 26.
The bottom edge of the vent termination must be a minimum
of 12 inches (30 cm), 18 inches (45 cm) in Canada, above
the average or expected snow level as shown in Figure 22
on page 26.
5. If installing both intake air and vent piping in a Direct Vent
conguration vertically through the roof the following
instructions must be followed:
The intake air and vent pipes must penetrate the same side
of the roof as shown in Figure 24 on page 26.
The intake air and vent terminations must be oriented facing
downward and in the same direction as shown in Figure 24
on page 26.
The intake air and vent terminations must have a minimum
separation of 24” (61 cm) measured on center line as shown
in Figure 24 on page 26. In colder climates this separation
should be increased to at least 48 inches (122 cm).
The bottom edge of the intake air and vent terminations
must be a minimum of 12 inches (30 cm), 18 inches (45 cm)
in Canada, above the average or expected snow level as
shown in Figure 22 and Figure 24 on page 26.
6. When the intake air and/or vent piping from multiple
water heaters will terminate in the same location the vent
terminations can be grouped together in close proximity 0
inches/touching. Intake air terminations can also be grouped
together in close proximity 0 inches/touching.
The distance between the closest vent and intake air
terminations must be a minimum of 24 inches (61 cm) as
shown in Figure 24 on page 26. In colder climates this
separation should be increased to at least 48 inches (122 cm).
7. Cut a 4 inch (10 cm) diameter hole for 3 inch pipe or 5 inch
(13 cm) diameter hole for 4 inch pipe where the pipe(s) will
pass through the roof.
NOTE: Beware of concealed wiring and piping when cutting
through the roof.
INTAKE AIR SCREEN
(remove for Direct Vent)
3 INCH INTAKE AIR CONNECTIONS
FACTORY INSTALLED
INTAKE AIR
SCREEN
Figure 18
14. If installing 3 inch intake air pipe connect the intake air pipe to
the intake air connection on the water heater.
15. If installing 4 inch intake air pipe transition to 3 inch pipe at
the intake air connection on the water heater as shown in
Figure 19. The eld installed 3” pipe between the intake air
connection and the 4” x 3” reducer coupling should be 18
inches (45 cm) or less in length.
3” PIPE FACTORY
INSTALLED
INTAKE AIR CONNECTION
INTAKE AIR
COMBUSTION
BLOWER
FACTORY INSTALLED
INTAKE AIR TEE
FITTING
1/2 INCH
BRANCH
HOSE BARB FITTING FOR
BLOCKED INTAKE AIR
SWITCH SENSING TUBE
FERNCO
COUPLING
Figure 19
INSTALL TEE FITTING AS CLOSE TO WATER HEATER
INTAKE AIR CONNECTION AS POSSIBLE
INTAKE AIR CONDENSATE TEE INSTALLATION
FIELD SUPPLIED
3” x 3” x 1/2” TEE
WITH HOSE BARB
FITTING INSTALLED
FACTORY
INTAKE AIR
CONNECTION
INTAKE
AIR
PIPING
CONNECT FIELD
SUPPLIED FLEXIBLE
DRAIN HOSE TO BARB
FITTING AND FORM A
LOOP WATER TRAP IN
DRAIN HOSE
RUN DRAIN HOSE
TO SUITABLE FLOOR
DRAIN SEPARATELY
FROM OTHER
CONDENSATE DRAINS
Figure 20