Vent Pipe System; Draft Hood Installation - A.O. Smith Water Heater User Manual

CONFINED
GABLE VENT
j TO OUTDOORS
INSTALLABOVE
INSULATION
• OUTLET
AIR TO
ATTIC 1 SQ.
INCH PER
4000 BTUH
ALTERNATE AIR FROM
AIR INLET
1 SQ. INCH PER OPEN _1_
4000 BTUH FOUNDATION "_
VENT
ALL AIR FROM OUTDOORS: INLET AIR FROM VENTILATED
CRAWL SPACE/OUTLET AIR TO VENTILATED ATTIC
FIGURE 6.
•GABLE VENT
TO OUTDOORS
_"INSTALL ABOVE
INSULATION
OUTLET AIR
_TO ATTIC
1 SQ. INCH
PER 4000
BTUH
INLET AIR DUCT
1 SQ. INCH PER
4000 BTUH
12" MAXIMUM
ALL AIR FROM OUTDOORS THROUGH VENTILATED ATTIC
FIGURE 7.
CONFINED
SPACE
2000 BTUH
1 SQ. INCH PER
2000 BTUH
ALL AIR FROM OUTDOORS USING HORIZONTAL DUCTS
FIGURE 8A.
r'',,,,
ALTERNATIVE
OPENING
LOCATION
CONFINED
SPACE
1SQ. INCH
PER3000 BTUH
ALL AIR FROM OUTDOORS - USING A SINGLE PERMANENT OPENING
FIGURE 8B.
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 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.
IMPORTANT: The use of vent dampers is not
recommended by the manufacturer of this water heater.
Although some vent dampers are certified by CSA
International, this certification applies to the vent damper
device only and does not mean they are certified for use
on this water heater.
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 technician.
Draft Hood Installation
13
L SCREWS (FOUR PROVIDED)
b_I--DRAFT HOOD
SLDT---- \ X-- AC ETTDP ' --SLDT
INSTALL THE DRAFT HOOD WITH
THE FOUR SCREWS PROVIDED.
FIGURE 9