Installation Requirements

CODE REQUIREMENTS
The unit shall be installed by a qualied agency in accordance with the
standards of the National Fire Protection Association and the national Fuel
Gas Code for gas-red duct furnaces. These standards should be followed
carefully. Authorities having jurisdiction should be consulted prior to instal-
lation to verify local codes. The unit shall be installed in accordance with the
National Fuel Gas Code ANSI Z223.1 (latest edition).
In Canada, the installation of these appliances is to be in accordance with
CAN/C.G.A.-B149.1 and B149.2, Installation Code for Gas Burning Appli-
ances and Equipment, and local codes. Appliances with less than 80% ther-
mal efciency not approved for installation in Canada after April 29, 2005.
Installation in aircraft hangars should be made in accordance with ANSI/
NFPA No. 409 (latest edition), standard for aircraft hangars, and in pub-
lic garages in accordance with NFPA No. 88A (latest edition), standard for
parking structures, and NFPA No. 88B for repair garages. In Canada, instal-
lation in aircraft hangars should be in accordance with the requirements of
the enforcing authorities and in public garages in accordance with CAN1-
B149 codes.
CONDENSATION
When air inlet temperatures are below 40°F or temperature rise is less than
40°F, condensation on the heat exchanger is possible. The resulting steel
corrosion will shorten the heat exchanger life expectancy. Use E-3 (409)
stainless steel for heat exchanger material to inhibit corrosion.
If there is a possibility of condensation of ue products, E-3 (409) stainless
steel should be used for burner material.
CHLORINE
The presence of chlorine vapors in the combustion air of gas-red heating
equipment presents a potential corrosive hazard. Chlorine will, when ex-
posed to ame, precipitate from the compound, usually Freon or degreaser
vapors, and into solution with any condensation that is present in the heat
exchanger or associated parts. The result is hydrochloric acid which read-
ily attacks all metals including 300 grade stainless steel. Care should be
taken to separate these vapors from the combustion process. This may
be done by wise location of units with regard to exhausters or prevailing
wind directions. Remember, chlorine is heavier than air. This fact should be
kept in mind when determining installation locations of heaters and building
exhaust systems.
CLEARANCE AND COMBUSTION AIR
Units must be installed so that clearances are provided for combustion air
space, service and inspection, and for proper spacing from combustible
construction.
All fuel-burning equipment must be supplied with the air that enters into the
combustion process and is then vented to the outdoors. Sufcient air must
enter the equipment location to replace that exhausted through the vent
system. Modern construction methods involve the greater use of insulation,
improved vapor barriers and weather-stripping, with the result that build-
ings generally are much tighter structurally that they have been in the past.
Combustion air supply for gas-red equipment can be affected by these
construction conditions because inltration that would have existed in the
past may not be adequate. Extensive use of exhaust fans aggravates the
situation. In the past, the inltration of outside air assumed in heat loss
calculations (one air change per hour) was assumed to be sufcient. How-
ever, current construction methods using more insulation and vapor barri-
ers, tighter tting and gasketed doors and windows or weather-stripping,
and mechanical exhaust fans may now require the introduction of outside
air through wall openings or ducts.
HEATERS LOCATED IN CONFINED SPACES
Do not install unit in conned space without providing wall openings leading
to and from this space. Provide adequate openings near oor and ceiling for
ventilation and air for combustion, as shown above, depending on combus-
tion air source as noted below.
INSTALLATION REQUIREMENTS
Duct Furnaces
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don’t touch electrical switches.
3. Extinguish any open ame.
4. Immediately call your gas supplier.
WARNING: Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury, or death. Read
the installation operation and maintenance instructions thoroughly
before installing or servicing any heating equipment.
WARNING: Failure to provide proper venting could result in death,
serious injury, and/or property damage. Unit must be connected
to ue having sufcient draft to ensure safe and proper operation.
Unit must be properly vented to the outside of the building. Safe
operation of any gravity vented heating equipment requires a
properly operating vent system, correct provision for combustion
air and regular maintenance and inspection.
WARNING: Gas-red appliances are not designed for use in haz-
ardous atmospheres containing ammable vapors or combustible
dust, or atmospheres containing chlorinated or halogenated
hydrocarbons.
Installations in public garages or airplane hangars are permitted
when in accordance with ANSI Z223.1 and NFPA 54 codes or CAN1-
B149 and enforcing authorities.
FOR YOUR SAFETY
WARNING: The use and storage of gasoline or other ammable
vapors and liquids in the vicinity of this appliance is hazardous.
DANGER: The gas burner in all Reznor gas-red equipment is
designed and equipped to provide complete combustion. However,
if the installation does not permit the burner to receive the proper
supply of combustion air, complete combustion may not occur.
The result is incomplete combustion which produces carbon
monoxide, a poisonous gas that can cause death. Safe opera-
tion of indirect-red gas burning equipment requires a properly
operating vent system which vents all ue products to the outside
atmosphere. Failure to provide proper venting will result in a health
hazard which could cause serious personal injury or death.
Always comply with the combustion air requirements in the instal-
lation codes and instructions. Combustion air at the burner should
be regulated only by manufacturer-provided equipment. NEVER
RESTRICT OR OTHERWISE ALTER THE SUPPLY OF COMBUSTION
AIR TO ANY HEATER. Indoor units installed in a conned space
must be supplied with air for combustion as required by code and
in the installation manual. INSTALL AND MAINTAIN THE VENT
SYSTEM TO CONTINUALLY VENT ALL FLUE PRODUCTS SAFELY
TO THE OUTSIDE ATMOSPHERE.
Form RZ-C-DH Page 25
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