W415-2845 / B / 11.10.20
21
IOM
• 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 5 feet (1.524m). Horizontal sections must not dip or sag.
• All vent runs through unconditioned space where freezing might occur should be insulated with “arm-a-
fl
ex”, “rub-
a-tex” or equivalent 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.
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.
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
!
!
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
!
!
3"
(76mm)
MIN.
12"
(305mm)
MIN.
VERTICAL TEE
TERMINATION
GRADE
8"
(203mm)
MIN.
FIGURE 8A - STANDARD (STRAIGHT)
HORIZONTAL VENT DETAIL
3"
(76mm)
MIN.
12"
(305mm)
MIN.
INTAKE
EXHAUST
GRADE
8"
(203mm)
MIN.
FIGURE 8B - STANDARD (STRAIGHT)
HORIZONTAL VENT DETAIL
NOTE
•
For 80KBTU small cabinet and 120KBTU large cabinet furnaces it is recommended to install the air
intake on the side of the furnace for ideal supply of combustion air.
•
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.
9.0 VENTING GUIDELINES
Summary of Contents for WSX-EN Series
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