W415-0973 / B / 08.28.13
19
IOM
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.
CAUTION
!
!
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 (4.6m).
(See Venting Table)
• Horizontal piping must slope back towards the furnace at a minimum rate of 1/4" to the foot (18mm per
meter), so that condensate drains towards the furnace.
• Horizontal runs must be supported at least every 3 feet (914mm). Horizontal sections must not dip or sag.
• All vent runs through unconditioned space where freezing might occur should be insulated with 1” (25mm) 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.
This includes travel through unconditioned attic space.
• 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.
It is recommended that an offset is created (2 x 45°s) in the vertical exhaust vent piping to reduce the risk of
fl
ooding the exhauster with excessive vent condensate run down.
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.
IMPORTANT
:
•
CLEAN AND DE-BURR ALL PIPE CUTS (INCLUDING UNCUT VENT LENGTHS). THE
SHAVINGS MUST NOT BE ALLOWED TO BLOCK THE EXHAUST, COMBUSTION AIR INLET
OR CONDENSATE DRAIN LINES.
• IF THE PIPE AND FITTINGS ARE TO BE OTHER THAN PVC, USE THE PROPER CLEANER,
PRIMER AND CEMENT FOR THE DISSIMILAR MATERIALS.
• THE EXHAUST VENT MUST BE SUPPORTED APPROPRIATELY PRIOR TO IT BEING
FITTED TO THE EXHAUSTER.
UNDER NO CIRCUMSTANCES SHALL THE EXHAUSTER
BEAR ANY WEIGHT OF THE VENTING SYSTEM.
H3.12
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
IN PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
WARNING
!
!
Summary of Contents for 9500 series
Page 25: ...W415 0973 B 08 28 13 25 IOM FIGURE 14A DIRECT VENT TERMINAL CLEARANCES...
Page 26: ...W415 0973 B 08 28 13 26 IOM IOM FIGURE 14B NON DIRECT VENT TERMINAL CLEARANCES...
Page 55: ...W415 0973 B 08 28 13 55 IOM 23 0 SERVICE HISTORY 43 1...
Page 56: ...W415 0973 B 08 28 13 56 IOM IOM 44 1 24 0 NOTES...
