Appendix K: Gas-fired Furnace Module Installation and Maintenance
The furnace covered by this appendix is a component of
a “Listed” product, subject to the guidelines of applica-
tion as designated by the Certifying Agency and outlined
in the Appliance Manufacturer’s installation and operation
instructions.
The information provided in this appendix applies to the
furnace module, installed in the appliance and to its op-
eration, maintenance and service. Refer to the Appliance
Manufacturer’s instructions for information related to all
other components.
Installation Requirements
1. Be sure that the unit is located with respect to build-
ing construction and other equipment to provide
ready access and clearance to access panels or
doors that must be opened to permit adjustment and
servicing of the heating section. See
the required service clearance dimensions.
2. Do not install the appliance where it may be exposed
to potentially explosive or hazardous atmospheres
containing flammable vapors or combustible dust.
3. Do not locate the appliance in areas or near building
ventilators or exhausts where corrosive vapors (such
as chlorinated, halogenated or acidic or airborne
substances containing silicone) are present in the
atmosphere or can be mixed with combustion air en-
tering the furnace module.
4. Do not install the appliance in locations where flue
products can be drawn in the adjacent building
openings such as windows, fresh air intakes, etc.
5. The appliance is not certified or suitable for use in
drying or process applications. Units used in such
applications voids any warranty and Manufacturer
disclaims any responsibility for this appliance or
application.
6. If any original wire supplied with the furnace must
be replaced, it must be replaced with wiring material
having a temperature rating of at least 104°F [90°C].
7. Provide necessary support for wiring in furnace ves-
tibule. Wiring should not contact metal surfaces that
may be hot during furnace module operation.
Installation
Verify the following before placing the gas furnace into
service:
1. Gas supply provided matches the gas type marked
on the furnace module rating plate, the gas supply
line has been completed according to the
section and has been
cleaned, drained and purged to the external manual
shut-off valve.
2. There is an adequate supply of air for the combus-
tion process for the furnace module according to the
type of installation.
3. There is a properly designed vent system connected
to the furnace module to convey the products of
combustion (flue gases) outdoors and are directed
WARNING
Fire or Explosion Hazard
1. Failure to follow safety warnings exactly could
cause serious injury, death or property damage.
2. Be sure to read and understand the installation,
operating and maintenance instructions in this ap-
pendix thoroughly before installing or servicing this
equipment.
3. Improper installation, adjustment, alteration, service
or maintenance can cause serious injury, death or
property damage.
4. Do not store or use gasoline or other flammable
vapors or liquids in the vicinity of this or any other
appliance.
For Your Safety – What to do if You Smell Gas
1. Open windows if appliance is indoors.
2. Do not try to light any appliance.
3. Do not touch electrical switches or use any phone
in the building.
4. Extinguish any open flame.
5. Leave the building immediately.
6. Immediately call your Gas Supplier from a phone
remote from the building. Follow the Gas Supplier’s
instructions.
7. If you cannot reach your Gas Supplier, call the fire
department.
Installation and Service
1. Installation and service must be performed by a
qualified Installer, service agency or the Gas Supplier.
IMPORTANT
Combustion air intake and vent locations differ; see sub-
mittal drawings for actual locations.
IMPORTANT
All gas furnace installations must be in accordance with
the National Fuel Gas Code ANSA Z223.1 (NFPA 54) in
the United States, to the Gas Installation Code Can/CGA
B149 in Canada and all other applicable local codes and
ordinances. These requirements include but are not lim-
ited to:
1. Combustion air supply to the gas furnace
2. Venting of the products of combustion
3. Gas supply piping and connections
4. Unit location and clearances
VCES-VHC-IOM-1F – VHC-36, -42 & -50
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