INSTALLATION INSTRUCTIONS Gas Furnace: WFAR
440 01 7104 02 37
Specifications subject to change without notice.
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each ap-
pliance connected to the venting system being placed
into operation could result in carbon monoxide poison-
ing or death.
Failure to follow the steps outlined below for each ap-
pliance connected to the venting system being placed
into operation could result in carbon monoxide poison-
ing or death.
1. Seal any unused openings in venting system.
2. Inspect the venting system for proper size and hori-
zontal pitch, as required in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 or the CSA B149.1 Nat-
ural Gas and Propane Installation Code and these in-
structions. Determine that there is no blockage or re-
striction, leakage, corrosion and other deficiencies,
which could cause an unsafe condition.
3. As far as practical, close all building doors and win-
dows and alldoors betweenthe space inwhich theap-
pliance(s) connected to the venting system are loc-
ated and other spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance notconnec-
ted to the venting system. Turn on any exhaust fans,
such as range hoods and bathroomexhausts, 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 and/orCSA B149.1 Natural Gas and
Propane Installation Code.
9. After it has been determined thateach appliance con-
nected to the venting system properly vents when
tested as outlined above, return doors, windows, ex-
haustfans,fireplace dampersandany othergas--fired
burning appliance to their previous conditions of use.
General
If this furnace replaces a furnace that was connected to a vent
system or chimney, the vent or vent connectors of other
remaining appliances may need to be re--sized. Vent systems
or vent connectors of other appliances must be sized to the
minimum size as determined using appropriate table found in
the current edition of National Fuel Gas Code NFPA 54/ANSI
Z--223.1. In Canada, refer to CAN/CSA--B149.1.
An abandoned masonry chimney may be used as a raceway
for properly insulated and supported combustion--air (when
applicable) and vent pipes. Each furnace must have its own set
of combustion--air and vent pipes and be terminated
individually, as shown in Figure 53 for Direct Vent (2--Pipe)
system, or Figure 54 for single--pipe or ventilated combustion
air option.
A furnace shall not be connected to a chimney flue serving a
separate appliance designed to burn solid fuel. Other gas
appliances with their own venting system may also use the
abandoned chimney as a raceway providing it is permitted by
local code, the current edition of the National Fuel Gas Code,
and the vent or liner manufacturer’s installation instructions.
Care must be taken to prevent the exhaust gases from one
appliance from contaminating the combustion air of other gas
appliances.
Do not take combustion air from inside the chimney when using
ventilated combustion air or single--pipe vent option.
These furnaces can be vented as direct--vent (two--pipe),
ventilated combustion air, or non-direct (single--pipe) vent
system. Each type of venting system is described below.
Common venting between these furnaces or other appliances
is prohibited.
Materials
U.S.A.
Combustion air and vent pipe, fittings, primers, and solvents
must conform to American National Standards Institute (ANSI)
standards and American Society for Testing and Materials
(ASTM) standards. See Table 12 for approved materials for use
in the U.S.A. This furnace is also CSA approved for venting
with M&G DuraVent® PolyPro® polyproplylene venting
systems.
Canada
Special Venting Requirements for Installations in Canada
Installation in Canada must conform to the requirements of
CAN/CSA B149 code. Vent systems must be composed of
pipe, fittings, cements, and primers listed to ULC S636. M&G
DuraVent PolyPro polyproplylene venting systems are ULC
S636 listed.
NOTE: When using polypropylene venting systems, all venting
materials used, including the vent terminations, must be from
the same manufacturer.
Venting Systems
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow the instructions outlined below for each
appliance being placed into operation could result in
carbon monoxide poisoning or death.
For all venting configurations for this appliance and other
gas appliances placed into operation for the structure,
provisions for adequate combustion, ventilation, and di-
lution air must be provided in accordance with:
U.S.A. Installations: Section 9.3 NFPA 54/ANSI
Z223.1 1--2012, Air for Combustion and Ventilation and
applicable provisions of the local building codes.
Canadian Installations: Part 8 of
CAN/CSA--B149.1--10. Venting Systems and Air
Supply for Appliances and all authorities having
jurisdiction.
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