A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 10

GETTING STARTED
Vent Assembly
The vent piping and the vent
termination hood are to be connected
as shown in Figure 7. Maintain
vent clearances to combustibles
as shown in Figure 9. Depending
on your access to where the vent
termination passes through the wall,
you may wish to connect the piping
and vent termination hood together
first. Inside the vent piping there are
springs that hold the two corrugated
pipes in position. When the pipes
are stretched to the required length,
the springs will remain properly
spaced. To connect the vent piping
to the vent termination hood, first
slide the inner (3") corrugated pipe
over the inner vent termination pipe.
Continue this action until the locking
clip on the corrugated pipe snaps into
position in the corresponding groove
(see Figure 7). Secure corrugated
pipe with screw (supplied) inserted
through hole opposite the locking clip.
Repeat this process with the outer
(6") corrugated pipe and lock it into
position on the outer pipe on the vent
termination (see Figure 7). Secure
corrugated pipe with screw (supplied)
inserted through hole opposite the
locking clip.
NOTICE: To reduce the friction
between the corrugated pipe and
the O-rings, it is recommended to
dampen the O-rings with water. The
completed connection is shown in
Figure 8.
Outer Inner Vent Termination
Corrugated Pipe
Outer Vent
Pipe Locking
Termination Pipe
Clip
O-Ring
Locking Clip
Inner
Groove
Corrugated Pipe
Figure 7 - Vent Piping
10 • Residential Gas Water Heater Use and Care Guide
Screw
Figure 8 - Completed Vent Connection
Securing Vent Termination
Assembly to the Exterior Wall
Some models are supplied with trim
plates which may be used to cover
the holes in the wall (see "Completed
Installation" on page 2 and
Figure 9). Slide one trim plate (if
supplied) over the outer corrugated
tube, then insert the outer corrugated
tube through the clearance hole from
exterior wall. Secure the trim plate to
the exterior wall, then secure the vent
terminal to the exterior wall with 4
screw anchors (included) appropriate
for the type of wall construction.
Caulk the junction of the vent terminal
base plate and the exterior wall with
exterior type sealant (not included).
Slide the trim plate (inside) over the
outer corrugated tube and fasten the
trim plate to the interior wall. Caulk
the junction of the outer corrugated
tube and the trim plate (inside) with
suitable sealant. The vent termination
hood attaches to the vent piping as
shown in Figure 9.
1" 14" Zero
Clearance Clearance
Trim Plate
Spring
(Inside)
Apply
Cutaway to
Sealant
Show Spring
Placement
Figure 9 - Trim Plate Install
Vent Restricter Plate
The vent restricter plate (see Figure 10)
is required for short horizontal runs on
low vent installations (Figure 16) and
high vent installations (Figure 18).
For short horizontal vent runs (see
Figure 17) place the restricter plate
over the flue tube reducer before
connecting the inner corrugated tube
to the flue tube reducer. DO NOT use
the restricter plate if the horizontal run
is greater than 30".
For high vertical runs use the restricter
plate only when the vertical run of the
venting above the heater is greater
than 48" (see Figure 18).
Do not use the restricter plate for
short horizontal runs or high vent
installations where elevation exceeds
5,400 feet.
Flue Tube
Reducer
Figure 10 - Restricter Plate
Uncompressing the Corrugated
Tubing
• Pull the inner corrugated tube
towards the water heater and leave
some length over the water heater's
center for bending (see Figure 11).
• Pull the outer corrugated tube
toward the water heater and leave it
2" shorter than the inner corrugated
Trim Plate
(Outside)
tube.
• Make sure there are two springs
evenly spaced at the bend in the
tube.
Apply
• Use metal hangers spaced a maxi-
Sealant
mum of 36" apart to keep venting
level or with a slope upward from the
heater to terminal. It is recommend-
ed to add vibration isolation between
the venting and hangers to prevent
vibration and noise from spreading
to the rest of the building.
Upper Air
Inlet Box
Restricter
Plate