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UBXC-UDXC-IOM (01-24) 1042980-0
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.
Model Configuration
Model UBXC is a standard power-vented blower-type unit. Model UDXC is a standard power-vented fan-type unit.
For an installation location where dirt, dust, or other airborne contaminants are present in the indoor environment, a
separated-combustion unit that uses outside air for combustion is recommended. Separated-combustion units are
designed to separate air for combustion and flue products from the environment of the building in which the unit is
installed. Using a separated-combustion unit reduces the buildup of contaminants on the burner. Any buildup on
the burner adversely affects the combustion process. Either model can be converted to a separated-combustion
unit using a shipped-separate conversion kit in accordance with the conversion instructions provided with the kit.
⚠ DANGER ⚠
Ensure that venting and combustion air are in accordance with this manual for standard units or
with the separated-combustion conversion instructions for separated-combustion units.
Certification
⚠ DANGER ⚠
Heaters certified for residential use are intended for the heating of non-living spaces that are attached
to or part of a structure that contains space for family living quarters. They are not intended to be
the primary source of heat in residential applications or to be used in sleeping quarters.
• These unit heaters are listed by Intertek for use in industrial and commercial installations in the United States
and Canada. In addition, model UDXC in unit sizes 30, 45, 60, 75, 100, and 125 is listed in the United States and
Canada as a utility heater for use in non-living spaces that are attached to, adjacent to, or part of a structure that
contains space for family living quarters.
• All models and unit sizes are available for use with either natural or propane gas. The type of gas, the gas input
rate, and the electrical supply requirement are shown on the heater rating plate. Check the rating plate to verify
that the heater is appropriate for the installation site.
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, latest edition). A
Canadian installation must be in accordance with the Natural Gas and Propane Installation Code (CSA B149, latest
edition). This code is 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 the Standard for Aircraft Hangars (ANSI/NFPA No.
409, latest edition). Installations in public garages should be in accordance with the Standard for Parking Structures
(ANSI/NFPA No. 88A, latest edition). Installations in repair garages should be in accordance with the Standard
for Repair Garages (ANSI/NFPA No. 88B, latest edition). In Canada, installations in aircraft hangars should be
in accordance with the requirements of the enforcing authorities, and in public garages, in accordance with the
CSA B149 code.
• If the heater is being installed in the Commonwealth of Massachusetts, installation must be performed by a licensed
plumber or licensed gas fitter.
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