53
Figure 12-9 PVC/CPVC air intake/
vent connection
12 - INSTALLATION - CATEGORY IV: Vent and combustion air
12.6.2 - PVC/CPVC air
intake connection
Combustion Air Intake
connection (see Figure 12-9
Item “P”).
This connection is used
to provide combustion air directly to
the heater from outdoors. Combustion
air piping must be supported per
guidelines listed in the National
Mechanical Code, Section 305, Table
305.4 or as local codes dictate.
To connect a PVC/CPVC pipe to the
air intake connection proceed as follow
while referring to Figure 12-9:
1. Prepare the connection between
adapter “P” and pipe “N” like
described on Section 12.6.1;
2. Insert the air inlet PVC/CPVC pipe,
for 3” into the adapter “P”;
3. Tighten the clamp “F” to
mechanically secure the adapter “P”
to the pipe.
12.6.3 - PVC/CPVC vent
connection
Vent connection (see Figure
12-9 Item “B”)
.
This connection
is used to provide a passageway for
conveying combustion gas to the
outside. Vent piping must be supported
per the National Building Code, Section
305, Table 305.4 or as local codes
dictate.
To connect a PVC/CPVC pipe to the
vent connection proceed as follow
while referring to Figure 12-9:
1. Prepare the connection between
adapter “B” and pipe “G” like
described on Section 12.6.1;
2. Insert the flue exhaust PVC/CPVC
pipe, for 3” into the adapter “B”;
3. Tighten the clamp “F” to
mechanically secure the adapter “B”
to the pipe.
WARNING!!!
Do not
insulate PVC/CPVC exhaust
pipe nor install into an
enclosure, closet, alcove or
any other obstruction thereby
preventing the cooling of the
exhaust pipe. Failure to follow
this warning could result in
excessive levels of carbon
monoxide or a fire, which can
result in severe personal injury
or death!
Figure 12-10 PVC/CPVC
air intake/Vent connection
correctly in place
Extend the
flue exhaust
pipe to
outside
building
020010.01.016
Extend the
air intake
pipe to
outside
building
A = Pipe connection
B = Flue exhaust adapter for
polypropylene pipe (Field
supplied)
F = Mechanically secure clamp
G = Polypropylene exhaust pipe
(Field provided)
H = Combustion analization
probe (Field installed)
L = Cap (Field provided)
M = Air intake connection
N = Polypropylene air inlet pipe
(Field provided)
P = Air intake adapter for
polypropylene pipe (Field
supplied)
A
B
F
P
F
H
G
A
L
N
020010.01.010
Combustion
air intake
Flue
exhaust
020010.01.039
CAUTION!!!
Apply a liberal
even coat of
VITON-BASED
RTV
high temperature silicone
(or equivalent) to the internal
side of the heater adapter (item
“B” and “P” fig.12-9)
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