Venting - International comfort products N8MXL Installation Instructions Manual

VENTING

The furnace shall be connected to a listed factory built
chimney or vent, or a clay−tile lined masonry or concrete
chimney. Venting into an unlined masonry chimney or
concrete chimney is prohibited.
When an existing Category I furnace is removed or replaced,
the original venting system may no longer be sized to
properly vent the attached appliances. An improperly sized
Category I venting system could cause the formation of
condensate in the furnace and vent, leakage of condensate
and combustion products, and spillage of combustion
products into the living space.
Vent system or vent connectors may need to be re−sized.
Vent systems or vent connectors, must be sized to approach
minimum size as determined using appropriate table found in
the NFGC.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
appliance connected to the venting system being placed
into operation could result in carbon monoxide poisoning
or death. The following steps shall be followed for each
appliance connected to the venting system being placed
into operation, while all other appliances connected to the
venting system are not in operation:
1. Seal any unused openings in venting system.
2. Inspect the venting system for proper size and
horizontal pitch, as required in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54. Determine that
there is no blockage or restriction, leakage,
corrosion and other deficiencies, which could
cause an unsafe condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which
the appliance(s) connected to the venting system
are located and other spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any
exhaust fans, such as range hoods and bathroom
exhausts, so they are operating at maximum
speed. Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected
thermostat so appliance is operating continuously.
7. Test for spillage from draft hood equipped
appliances at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of
a match or candle.
8. If improper venting is observed during any of the
above tests, the venting system must be corrected
in accordance with the National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
9. After it has been determined that each appliance
connected to the venting system properly vents
when tested as outlined above, return doors,
windows, exhaust fans, fireplace dampers and any
other gas−fired burning appliance to their previous
conditions of use.
441 01 1421 01
into operation. Adjust
Specifications are subject to change without notice.
GENERAL VENTING REQUIREMENTS
Follow all safety codes for proper vent sizing and installation
requirements, including local building codes, the National
Fuel Gas Code ANSI Z223.1−2012/NFPA 54−2012 (NFGC),
Parts 12 and 13, the local building codes, and furnace and
vent manufacturers' instructions.
These furnaces are design−certified as Category I furnaces in
accordance with ANSI Z21.47−2012/CSA 2.3−2012 and
operate with a non−positive vent static pressure to minimize
the potential for vent gas leakage. Category I furnaces
operate with a flue loss not less than 17 percent to minimize
the potential for condensation in the venting system. These
furnaces are approved for common venting and multistory
venting with other fan assisted or draft hood equipped
appliances in accordance with the NFGC, the local building
codes, and furnace and vent manufacturers' instructions. The
following information and warning must be considered in
addition to the requirements defined in the NFGC.
1. If a vent (common or dedicated) becomes blocked, the
furnace will be shut off by the draft safeguard switch
located on the vent elbow.
2. Do not vent this Category I furnace into a single−wall
dedicated or common vent. The dedicated or common
vent is considered to be the vertical portion of the vent
system that terminates outdoors.
3. Vent connectors serving Category I furnaces shall not
be connected into any portion of a mechanical draft
system operating under positive pressure.
4. Do not vent this appliance with any solid fuel burning
appliance.
5. Category I furnaces must be vented vertically or nearly
vertically unless equipped with a listed power venter.
6. Do not vent this appliance into an unlined masonry
chimney.
Figure 27.
MASONRY CHIMNEY REQUIREMENTS
NOTE: These furnaces are CSA design−certified for use in
exterior tile−lined masonry chimneys with a factory accessory
Chimney Adapter Kit. Refer to the furnace rating plate for
correct kit usage. The Chimney Adapter Kits are for use with
ONLY furnaces having a Chimney Adapter Kit numbers
marked on the furnace rating plate.
If a clay tile−lined masonry chimney is being used and it is
exposed to the outdoors below the roof line, relining might be
required. Chimneys shall conform to the Standard for
Chimneys, Fireplaces, Vents, and Solid Fuel Burning
Appliances ANSI/NFPA 211−2012 and must be in good
condition.
U.S.A.−Refer to Sections 13.1.8 and 13.2.20 of the NFGC
the
NFPA 54/ANSI Z223.1−2012 or the authority having
jurisdiction to determine whether relining is required. If relining
is required, use a properly sized listed metal liner, Type−B
vent, or a listed alternative venting design.
NOTE: See the NFPA 54/ANSI Z223.1−2012, 13.1.8 and
13.2.20 regarding alternative venting design and the
Exception, which cover installations such as the Chimney
Adapter Kits, which are listed for use with these furnaces.
The Chimney Adapter Kit is listed alternative venting system
for these furnaces. See the kit instructions for complete
details.
This furnace is permitted to be vented into a clay tile−lined
masonry chimney that is exposed to the outdoors below the
roof line, provided:
1. Vent connector is Type−B double−wall, and
2. This furnace is common vented with at least 1 draft
hood equipped appliance, and
3. The combined appliance input rating is less than the
maximum capacity given in Table 8, and
Refer to Chimney Inspection Chart,
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