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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.
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
instructions. 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 into operation. Adjust the 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.
Vent system or vent connectors may need to be resized. Vent
systems or vent connectors, must be sized to approach minimum
size as determined using appropriate table found in the NFGC.
54
and
these
25
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 fur-
nace 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 ded-
icated 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 ap-
pliance.
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 chim-
ney. Refer to Chimney Inspection Chart, Fig. 33.
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
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
NFPA54/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 NFPA54/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. See Product Data
Sheet for accessory listing.
The Chimney Adapter Kit is listed alternative venting system for
these furnaces. See the kit instructions for complete details.
Fuel
Burning
Appliances
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