A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 9

GETTING STARTED
DV Termination Hood
When the heater is in operation, the
vent termination hood will be hot (see
Figure 4).
EXHAUST
FRESH
GAS OUT
COMBUSTION
AIR IN
SCREW
Figure 4 - Vent Termination Hood
DV Termination Safety Cover
A Safety cover (see Figure 5) is
available to prevent accidental contact
with the vent terminal. Contact your
Customer Service Department for
ordering information.
Figure 5 - Safety Cover
Alternatively, a wire mesh or louvered
fencing guard can be built around the
termination as shown in Figure 6.
NOT TO BE USED AS
A STORAGE AREA
HOT
Figure 6 - Fencing Guard/Safety Cover
Vent Connection
After the location for the vent
terminal has been selected as outlined
in Figure 3 and Figure 4, use the
following illustrations for installation:
Locating Clearance Hole for Vent
Cut a clearance hole, approximately
7"in diameter, through the exterior
wall for the vent assembly. The
recommended height is 64" for 40
gallon models or 73" for 50 gallon
models, as measured from the hole
center to bottom of water heater.
Where the wall is combustible and
the wall thickness is over 14", a 1"
clearance to combustible surfaces
around the vent terminal is needed.
The first 14" is zero clearance (see
Figure 9 on page 10).
Standard Vent Arrangement
* If the horizontal length of the
venting is less than 30" the restricter
plate must be installed (see Figure 10,
Figure 16 through Figure 18).
• Do not use the restricter plate in an
offset installation (see Figure 14).
• Do not use the restricter plate if the
horizontal length of the venting is
greater than 30".
• Do not use the restricter plate for
installations where elevation is at or
exceeds 5,400 feet.
NOTICE: The length of "unstretched"
corrugated tube could cause the
length of the vent run to exceed the
minimum. In this case cut off a piece
of the corrugated tube to achieve the
17" minimum vent length.
Residential Gas Water Heater Use and Care Guide • 9