A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 8

GETTING STARTED
Venting
WARNING! Carbon Monoxide
Hazard. This water heater must
be supplied with adequate air and
vented outdoors. The vent system
must be installed by a qualified
person. Examples of a qualified
person include gas technicians,
authorized gas company personnel,
and authorized service technicians.
Failure to properly vent the water
heater can result in severe injury
or death from carbon monoxide
poisoning.
The vent system must be installed
according to local and state codes, or
in the absence of local or state codes,
the "National Fuel Gas Code", ANSI
Z223.1 (NFPA 54)-current edition. Do
not common vent this water heater
with any power vented appliance. Do
not use a vent damper anywhere in
the vent system of this water heater.
*Minimum 9 in. to
a window or door
that may be opened
Minimum 12 in.
from soffit
VENT TERMINAL AIR SUPPLY INLET
1. Permitted only if veranda, porch, deck or balcony is fully opened on a minimum of two sides beneath the floor.
2. A vent shall not terminate above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
Figure 3 - Vent Termination Hood
8 • Residential Gas Water Heater Use and Care Guide
To reduce the risk of carbon monoxide
poisoning, install a fuel gas and
carbon monoxide detector. Install and
maintain the detector in accordance
with the manufacturer's instructions
and local codes.
Installing a New Vent System
This direct vent water heater uses a
sealed venting system to supply fresh
combustion air to the heater and to
exhaust the products of combustion
(flue gases) to the outdoors The
venting is a "pipe in a pipe" system.
The inner (3") piping carries out the
exhaust flue gases while the outer (6")
piping carries in fresh combustion air.
The corrugated end of the vent piping
connects to the top of the water
heater and the opposite end connects
to the vent termination hood which
will be mounted on the exterior wall
(see Figure 4). Figure 4 shows the
hot exhaust gas exit and the location
**Minimum
18 in.
from outside
corner
AREA WHERE TERMINAL IS NOT PERMITTED
of the combustion air intake. Figure
7 through Figure 13 show how to
assemble and connect the venting
system.
Figure 14 through Figure 18 show
various installation options.
Vent Terminal Clearances
The vent system must terminate so
that proper clearances are maintained
as cited in local codes or the current
edition of the "National Fuel Gas
Code", ANSI Z223.1/NFPA 54 as
follows:
** Or as required by local authorities.
**Minimum 12 in.
Minimum
Minimum 12 in. 3 ft.
clearance to a
above grade or
anticipated snow service regulator
vent outlet
level
Minimum 9 in. to a non mechanical air supply inlet
into building or combustion air inlet to another appliance
Minimum 12 in.
under veranda, porch,
deck or balcony
(see footnote 1)
Minimum
3 ft.
above if within
10 ft.
horizontally to
a mechanical air
supply inlet