Venting Guidelines - Napoleon 9700 SERIES Installation And Operating Instructions Manual

9.0 VENTING GUIDELINES

FAILURE TO FOLLOW ALL VENTING GUIDELINES MAY RESULT IN ERRATIC FURNACE
OPERATION, FREEZE-UP OF THE EXHAUST AIR PIPING, OR SOOTING OF THE FURNACE.
READ AND FOLLOW ALL INSTRUCTIONS IN THIS SECTION. FAILURE TO PROPERLY VENT THIS
FURNACE CAN CAUSE CARBON MONOXIDE POISONING OR AN EXPLOSION OR FIRE RESULTING
NOTE
• Combustion air intake and exhaust termination should be inspected periodically to ensure they are clear of
obstructions. i.e. vegetation, debris, snow, etc.
• Accumulation of snow around the combustion air intake and exhaust termination may have negative effects
on appliance operation and/or performance. Snow accumulation should be considered when locating
combustion air intake and exhaust terminations.
• Venting may be vertical or horizontal.
• Minimum vent length - 15 total equivalent feet. (See Venting Table)
• Horizontal piping must slope back towards the furnace at a minimum rate of ¼" to the foot, so that condensate
drains towards the furnace.
• Horizontal runs must be supported at least every 3 feet. Horizontal sections must not dip or sag.
• All vent runs through unconditioned space where freezing might occur should be insulated with 1" thick, medium
density, foil-faced Fiberglass insulation. An equivalent "arm-a-fl ex" or "rub-a-tex" may also be used as long as there
is no heat tape applied to the vent pipe. For horizontal runs where water may collect, wrap the vent pipe with self
regulating 3 or 5 watt heat tape. The heat tape must be CSA, UL, or ULC listed and installed per the manufacturer's
instructions.
• DO NOT COMMON VENT WITH ANY OTHER APPLIANCE.
• If venting vertically, do not vent up a chimney serving another appliance or install in a chase with a metal or
high temperature plastic pipe from another gas or fuel burning appliance unless the required clearances to
combustibles can be maintained between the furnace venting system and other pipes.
All exhaust piping must be installed in accordance with CAN/CGA-B149.in Canada; the latest edition of
National Fuel Gas Code, NFPA 54 / ANSI Z223.1 in the United States, as well as in accordance with local
codes.
Size the combustion air and exhaust piping in accordance with Table 4. When calculating allowable vent
lengths, be sure to count all termination fi ttings in addition to counting the concentric vent as a straight pipe.
Take the building orientation and the presence of other buildings or other nearby structures into consideration
when planning the venting system location. Certain external structures could create air turbulence around the
vent termination leading to downdrafts and similar venting problems. In windy and hill locations, roof venting
may improve operations. Maximum venting length is based on 30 mph winds, areas where higher gusts are
dominant it is suggest to shorten the horizontal vent length.
The vent and combustion air intake shall be installed so that both are located in the same wind pressure zone.
CAUTION
!
WARNING
!
IN PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
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W415-1064 / 11.11.11