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Vent Pipe System
This water heater uses a non-direct, single-pipe vent
system to remove exhaust gases created by the
burning of fossil fuels. Air for combustion is taken from
the immediate water heater location or is ducted in from
the outside (see "Combustion Air Supply and
Ventilation").
This water heater must be properly vented for the
removal of exhaust gases to the outside atmosphere.
Correct installation of the vent pipe system is
mandatory for the proper and efficient operation of this
water heater and is an important factor in the life of the
unit.
The vent pipe must be installed according to all local
and state codes or in absence of local and state codes
with the "National Fuel Gas Code", ANSI Z223.1
(NFPA54)qatest edition. The vent pipe installation must
not be obstructed so as to prevent the removal of
exhaust gases to the outside atmosphere.
U.L recognized fuel gas and carbon monoxide (CO)
detectors are recommended in all applications and
should be installed using the manufacturer's
instructions and local codes, rules, or regulations.
Important: If you lack the necessary skills required to
properly install this venting system, you should not
proceed, but get help from a qualified installation
technician.
Drafthood Installation
Align the legs of the draft hood with the slots provided.
Insert the legs and secure the drafthood to the water
heater's top with the four screws provided as shown in
Figure 9. Do not alter the drafthood in any way. If you
are replacing an existing water heater be sure to use
the new drafthood supplied with the water heater.
Figure 9
Drafthood Installation
heet_tal Screws (four provided)
_-_ Drafthood
_- Jacket top
Install the drafthood with
the four screws provided.
Vent Pipe Size
The vent pipe must be installed according to all local
and state codes or in absence of local and state codes
with the "National Fuel Gas Code", ANSI Z223.1
(NFPA54)-Iatest edition. It is important that you follow
the guidelines in these instructions for sizing a vent pipe
system. If a transition to a larger vent size is required,
the vent transition connection must be made at the
drafthood outlet.
Vent Connectors
1. Type B, Double Wall, U.L Listed Vent Pipe.
2. Single Wall Vent Pipe.
Maintain the manufacturer's specified minimum
clearance from combustible materials when using type
B doublewall vent pipe.
Vent connectors made of type B, double wall vent pipe
material may pass through walls or partitions
constructed of combustible material if the minimum
listed clearance is maintained.
Maintain a 6 inch minimum clearance from all
combustible materials when using single wall vent pipe.
Important: Single wall vent pipe cannot be used for
water heaters located in attics and may not pass
through attic spaces, crawl spaces or any confined or
inaccessible location. Asingle wall metal vent connector
cannot pass through any interior wall.
When installing a vent connector, please note the
following:
• Install the vent connector avoiding unnecessary
bends, which create resistance to the flow of vent
gases.
_, Install without dips or sags with an upward slope of
at least 1/4-inch per foot.
,, Joints must be fastened by sheet metal screws or
other approved means. It must be supported to
maintain clearances and prevent separation of
joints and damage.
_, The length of the vent connector cannot exceed
75% of the vertical vent height.
• The vent connector must be accessible for
cleaning, inspection and replacement.
• Vent connectors cannot pass through any ceiling,
floor, fire wall, or fire partition.
Important: Existing vent systems must be inspected for
obstructions, corrosion and proper installation.
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