15
BASIC INSTALLATION & OPERATION
Vent Connectors:
1. Type B, Double wall, U.L. Listed Vent Pipe.
2. Single wall Vent Pipe.
Maintain the manufacturer’s speci
fi
ed minimum
clearance from combustible materials when using type
B double wall 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 one 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 con
fi
ned
or inaccessible location. A single 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 clean-
ing, inspection, and replacement.
•
Vent connectors cannot pass through any ceiling,
floor, firewall, or fire partition.
•
It is recommended (but not mandatory) that
a minimum 12 inches of vertical vent pipe be
installed on the draft hood prior to any elbow in the
vent system.
IMPORTANT: Existing vent systems must be inspected
for obstructions, corrosion, and proper installation.
Chimney Connection:
IMPORTANT: Before
connecting a gas 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. Also consult
local and state codes for proper chimney sizing and
application or, in the absence of local and state codes,
the “National Fuel Gas Code”, ANSI Z223.1(NFPA
54)-current edition.
•
The connector must be installed above the
extreme bottom of the chimney to prevent
potentially blocking the flue gases.
Figure 11
Figure 12
Vent Pipe System:
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 ef
fi
cient
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 the absence of local and
state codes, the “National Fuel Gas Code”, ANSI
Z223.1(NFPA 54)-current 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.
Vent Pipe Size:
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
draft hood outlet. DO NOT reduce the vent size to less
than the draft hood outlet diameter.
1 SQ. INCH PER
2000 BTUH
100 SQ. INCH
MINIMUM (EACH)
CONFINED
SPACE
1 SQ. INCH PER
2000 BTUH 100 SQ. INCH
MINIMUM (EACH)
INLET
OUTLET
OUTDOOR
AIR DUCTS
ALL AIR FROM OUTDOORS USING HORIZONTAL DUCTS
ALTERNATIVE
OPENING
LOCATION
1 SQ. INCH
PER 3000 BTUH
100 SQ. INCH
MINIMUM (EACH)
CONFINED
SPACE
ALL AIR FROM OUTDOORS - USING A SINGLE PERMANENT OPENING
