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VII. Venting (continued)
14. Maintain minimum 12 in. (300 mm) horizontal
spacing between vent terminal and a building
corner.
15. Under certain conditions, water in the flue gas may
condense, and possibly freeze, on objects around
the terminal including on the structure itself. If
these objects are subject to damage by flue gas
condensate, they should be moved or protected.
16. If possible, install the vent and combustion air
terminals on a wall away from the prevailing
wind. Reliable operation of this product cannot be
guaranteed if terminals are subjected to winds in
excess of 40 mph (64 km/hr).
17. Do not locate combustion air terminal in areas that
might contain combustion air contaminates, such
as near swimming pools.
18. For multiple appliance installations with horizontal
wall terminals, maintain minimum 12 in. (300
mm) horizontal distance between adjacent
vent terminals. Maintaining greater spacing is
recommended to avoid frost damage to building
surfaces where vent terminations are placed.
19. For multiple appliance installations with vertical
roof terminals, maintain minimum 12 in. (300
mm) horizontal distance between adjacent vent
terminals.
D. Field Installation
1. A factory installed cast aluminum ring provides a
means for air intake connection.
2. A factory installed vent connector provides a means
for vent connection.
3. Vent and combustion air intake pipe must be
supported to allow uniform flow of combustion
air and flue gas.
4. Plan venting system to avoid possible contact
with plumbing or electrical wires. Start at the vent
connector and work towards the vent termination.
5. Design the air intake system to allow 3/8" (9.5mm)
of thermal expansion per 10 ft. (3m) of CPVC/
PVC pipe. Runs of 20 ft. (6.1m) or longer that are
restrained at both ends must have an offset.
a. CPVC combustion air pipe joints must be cleaned
with primer and glued with cement. Follow all
manufacturer instructions and drawings when
preparing pipe ends for joining and using the
primer and the cement.
6. Size and cut wall opening such that a minimal
clearance is obtained and to allow easy insertion
of vent pipe.
!
Failure to follow these instructions could cause
products of combustion to enter the building,
resulting in severe property damage, personal
injury, or death.
Use CPVC vent components within any interior
space where air cannot circulate freely, including
through vertical or horizontal chase ways, inside a
stud wall, in closets, and through wall penetrations.
The use of cellular core PVC (ASTM F891),
cellular core CPVC or Radel (polyphenolsulfone)
is prohibited.
All condensate that forms in the vent must be able
to drain back to the heat exchanger.
Do not exceed maximum vent/combustion
air system length.
20
WARNING
WARNING
NOTICE
NOTICE
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