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5. Gas Vent Installation
!
CARBON MONOXIDE POISONING, FIRE AND
EXPLOSION HAZARD.
Failure to properly vent this furnace could result in
personal injury, death and/or property damage.
Read and follow all instructions in this section.
Install the vent in compliance with codes of the country having
jurisdiction, local codes or ordinances and these instructions.
This Category I furnace is fan--assisted.
A fan assisted appliance is an appliance equipped with an integral
mechanical means to either draw or force products of combustion
through the heat exchanger.
Category I furnace definition: A central furnace which operates with
a non--positive vent static pressure and with a flue loss not less than
17 percent. These furnaces are approved for common--venting and
multi--story venting with other fan--assisted or draft hood--equipped
appliances in accordance with the NFGC.
Category I Safe Venting Requirements
Category I furnace vent installations shall be in accordance with
Parts 10 and 13 of the National Fuel Gas Code (NFGC), ANSI
Z223.1--2006/NFPA 54--2006; and/or Section 7 and Appendix C of
the CSA B149.1--05, National Standard of Canada, Natural Gas
and Propane Installation Code; the local building codes; furnace
and vent manufacturer's instructions.
NOTE: The following instructions comply with the ANSI
Z223.1/NFPA 54 National Fuel Gas Code, based on the input rate
on the furnace rating plate.
1.
If a Category I vent passes through an attic, any concealed
space or floor, use ONLY Type B or Type L double wall vent
pipe. If vent pipe passes through interior wall, use Type B vent
pipe with ventilated thimble ONLY.
2.
Do NOT vent furnace into any chimney serving an open
fireplace or solid fuel burning appliance.
3.
Use the same diameter Category I connector or pipe as
permitted by the National Fuel Gas Code Code (NFGC) ANSI
Z223.1--2006 / NFPA 54--2006 Sections 12 and 13 venting
requirements.
4.
Push the vent connector onto the furnace flue collar of the
venter assembly until it touches the bead [at least
overlap] and fasten with at least two field--supplied,
corrosion--resistant, sheet metal screws located at least 140°
apart.
5.
Keep vertical Category I vent pipe or vent connector runs as
short and direct as possible.
6.
Vertical outdoor runs of Type--B or ANY single wall vent pipe
below the roof line are NOT permitted.
7.
Slope all horizontal runs up from furnace to the vent terminal a
1
minimum of
/
" per foot (6 mm/305 mm).
4
8.
Rigidly support all horizontal portions of the venting system
every 6' (1.8 m) or less using proper clamps and metal straps to
prevent sagging and ensure there is no movement after
installation.
9.
Check existing gas vent or chimney to ensure they meet
clearances and local codes. See Figure 1
10. The furnace MUST be connected to a factory built chimney or
vent complying with a recognized standard, or a masonry or
10
concrete chimney lined with a lining material acceptable to the
authority having jurisdiction.
masonry chimney or concrete chimney is prohibited. See
the 6.
instructions.
11. Fan--assisted combustion system Category I furnaces shall
not be vented into single--wall metal vents.
12. Category I furnaces must be vented vertically or nearly
vertically, unless equipped with a listed mechanical venter.
13. Vent connectors serving Category I furnaces shall not be
connected into any portion of mechanical draft systems
operating under positive pressure.
Venting and Combustion Air Check
NOTE: 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, and to make sure there is
adequate combustion air for all appliances, MAKE THE
FOLLOWING CHECK.
!
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 the 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 or the CSA B149.1, Natural Gas and Pro-
pane Installation Code and these instructions. Determine that
there is no blockage or restriction, leakage, corrosion and oth-
er 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
/
" (16 mm)
5.Turn on clothes dryers and any appliance not connected to the
8
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 in-
spected 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. (Figure 7)
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 and/or CSA
B149.1, Natural Gas and Propane Installation Code.
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.
Specifications are subject to change without notice
Venting into an unlined
Masonry Chimney Venting section in these
441 01 5003 01
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