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Form 421, Page 2
1. Installation Codes
The duct furnaces covered in this manual are design-certified by the
American Gas Association and approved by the Canadian Gas Asso-
ciation for use with either natural or propane gas. The type of gas for
which the furnace is equipped and the correct firing rate are shown on
the rating plate attached to the unit. Electrical characteristics are shown
on both the motor nameplate and the unit rating plate.
These units must be installed in accordance with local building codes.
In the absence of local codes, in the United States, the unit must be
installed in accordance with the National Fuel Gas Code Z223.1a (lat-
est edition). A Canadian installation must be in accordance with the
CAN/CGA B149.1 and B149.2 Installation Code for Gas Burning Ap-
pliances and Equipment. These codes are available from CSA Infor-
mation Services, 1-800-463-6727. Local authorities having jurisdic-
tion should be consulted before installation is made to verify local codes
and installation procedure requirements.
Clearances from the heater and vent to construction or material in stor-
age must conform with the National Fuel Gas Code ANSI Z223.1a
(latest edition) pertaining to gas-burning devices, and such material
must not attain a temperature over 160
o
F by continued operation of the
heater.
Special Installations (Aircraft Hangars/
Garages)
Installations in aircraft hangars should be in accordance with ANSI/
NFPA No. 409 (latest edition), Standard for Aircraft Hangars; in pub-
lic garages in accordance with ANSI/NFPA No. 88A (latest edition),
Standard for Parking Structures; and for repair garages in accordance
with ANSI/NFPA No. 88B (latest edition), Standard for Repair Ga-
rages. ANSI/NFPA-88 (latest edition) specifies overhead heaters must
be installed at least eight feet above the floor. In Canada, installations
in aircraft hangars should be in accordance with the requirements of
the enforcing authorities, and in public garages in accordance with CAN/
CGA B149 codes.
HAZARD INTENSITY LEVELS
1. DANGER:
Failure to comply will result in severe personal injury or death and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury and/or property damage.
WARRANTY: Warranty is void if......
a. Furnaces are used in atmospheres containing flammable
vapors or atmospheres containing chlorinated or haloge-
nated hydrocarbons or any contaminant (silicone, alu-
minium oxide, etc.) that adheres to the spark ignition flame
sensing probe.
b. Wiring is not in accordance with the diagram furnished
with the heater.
c. Unit is installed without proper clearances to combustible
materials or located in a confined space without proper
ventilation and air for combustion. (See Paragraph 5.)
d. Furnace air throughput is not adjusted within the range
specified on the rating plate.
2. Warranty
Refer to limited warranty information on the warranty card in the
"Owner's Envelope".