American Water Heater 6510319 Water Heater User Manual


 
Chimney Connection
Important: Before connecting a vent to a chimney,
make sure the chimney passageway is clear and free of
obstructions. The chimney must be cleaned if
previously used for venting solid fuel appliances or
fireplaces.
!
The connector must be installed above the extreme
bottom of the chimney to prevent potential
stoppage of the flue gases.
!
The connector must be firmly attached and sealed
to prevent it from falling out.
!
To aid in removing the connector, a thimble or slip
joint may be used.
!
The connector must not extend beyond the inner
edge of the chimney as it may restrict the space
between it and the opposite wall of the chimney
(Figure 10).
Do not terminate the vent connector in a chimney that
has not been certified for this purpose. Some local
codes may prohibit the termination of vent connectors
in a masonry chimney.
Vertical Exhaust Gas Vent
Vertical exhaust gas vents must be installed with U.L.
listed type B vent pipe according to the vent
manufacturer’s instructions and the terms of its listing.
It must be connected to the water heater’s drafthood by
a certified vent connector or by directly originating at
the drafthood opening.
Vertical gas vents must terminate with a listed cap or
other roof assembly and be installed according to their
manufacturer’s instructions.
Gas vents must be supported to prevent damage, joint
separation, and maintain clearances to combustible
materials (Figures 11 and 12).
Important: This gas vent must be terminated in a
vertical position to facilitate the removal of the burnt
gases.
An unused chimney flue or masonry enclosure may be
used as a passageway for the installation of a gas vent
(Figure 12).
Common (combined) venting is allowable with vertical
type B vent systems and lined masonry chimneys.
Figures 10-12 are examples of vent pipe system
installations and may or may not be typical for your
specific application. Consult the “National Fuel Gas
Code”, NFPA 54, ANSI Z223.1-latest edition and the
guidelines set forth by prevailing local codes.
Figure 12
Venting Through
a Chimney
with Type B
Doublewall
Vent Pipe.
Maintain
clearance
Seal
Slope up
1/4 in.
per
ft. min.
Vent
Connector
5 inches min.
Maintain
specified
clearance
Listed Vent Cap
Unused chimney
flue or masonry
enclosure
Figure 10
Chimney Termination
Vent System
Maintain
clearance
3 ft. min.
Certified Lined
Chimney
Seal
2 ft. min. above any object
within 10 ft.
Horizontally
Slope up
1/4 in.
per
ft. min.
Do not extend
vent beyond edge
of chimney
Vent
Connector
Figure 11
Vertical Gas
Vent System
With Type B
Double Wall
Vent Pipe
Maintain
clearance
Vent
connector
slope up
1/4 in. per
ft. min.
Listed Vent Cap
2 ft. min. above any object
within 10 ft.
horizontally
Type B Double
Wall Vent Pipe
Maintain
specified
clearance
3 ft. min.
11