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I-UEZ (04-21) 1034347-0
Certification
• These high-efficiency unit heaters are design-certified by Intertek for use in industrial and commercial installations
in the United States and in Canada.
• These unit heaters are available for use with either natural or propane gas. The type of gas, the input rate, and
the electrical supply requirement are shown on the heater rating plate. Check the rating plate to determine if the
heater is appropriate for the intended installation. All heaters are factory-equipped for use with natural gas and
include a conversion kit for field-conversion for use with propane.
• These unit heaters have a titanium stabilized primary heat exchanger with a MacroChannel® secondary heat
exchanger.
Warranty
Refer to the limited warranty form in the literature bag provided with the unit. The warranty is void if:
• Wiring is not in accordance with the diagram furnished with the heater.
• The unit is installed without proper clearance to combustible materials.
• A fan model is connected to a duct system or if the air delivery system is modified.
Installation Codes
• 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, ANSI Z223.1. A Canadian
installation must be in accordance with the CSA B149 Installation Codes. These codes are available from CSA
Information Services, 1-800-463-6727. Local authorities having jurisdiction should be consulted before installation
is made to verify local codes and installation procedure requirements.
• Installations in aircraft hangars should be in accordance with ANSI/NFPA No. 409 (latest edition), Standard for
Aircraft Hangars. Installations in public garages should be in accordance with ANSI/NFPA No. 88A (latest edition),
Standard for Parking Structures. Installations in repair garages should be in accordance with ANSI/NFPA No. 88B
(latest edition), Standard for Repair Garages. In Canada, installations in aircraft hangars should be in accordance
with the requirements of the enforcing authorities, and in public garages, in accordance with CSA B149 codes.
• If the heater is being installed in the Commonwealth of Massachusetts, installation must be performed by a licensed
plumber or licensed gas fitter.
Unit Location
⚠ CAUTION ⚠
• Unit heaters should not be used in an application where the heated space temperature is below
50°F. The combination of low space and combustion air temperatures may result in condensate
freezing in the secondary heat exchanger and/or condensate drain.
• Do not locate the heater where it may be exposed to water spray, rain, or dripping water.
• Refer to the venting instructions provided with the unit for venting requirements.
• Refer to the following sections of this manual to determine where to suspend the heater: Heater Throw, Mounting
Height Requirements, Hazards of Chlorine, Dimensions, Clearances, Weights, and Venting and Combustion
Air Requirements.
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