Installation manual

1.2 General
Information
WARNING
Should overheating occur, or the gas supply fail to shut
off, shut off the manual gas valve to the appliance before
shutting off the electrical supply.
WARNING
Do not use this appliance if any part has been under
water. Immediately call a qualied service technician to
inspect the appliance and replace any gas control that
has been under water.
WARNING
Installation should be done by a qualied agency in
accordance with these instructions. The qualied
service agency installing this high efciency separated-
combustion system is responsible for the installation.
1.3 Warranty
Refer to the limited warranty information on the Warranty Form shipped with the
heater.
Warranty is void if ...
a. Wiring is not in accordance with the diagram furnished with the heater.
b. The unit is installed without proper clearance to combustible materials.
c. A fan model is connected to a duct system or if the air delivery system is
modied.
1.4 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 accor-
dance with the National Fuel Gas Code, ANSI Z223.1 NFPA 54. A Canadian instal-
lation must be in accordance with the CSA B149 Installation Codes. These codes
Model UEAS high-efciency unit heaters are design certied by ITS for use in
industrial and commercial installations in the United States and Canada. Instruc-
tions in this manual apply only to Model UEAS heaters.
Model UEAS 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. NOTE: All Model UEAS heaters are factory equipped
for use with natural gas and include a conversion kit for eld conversion for use
with propane.
Model UEAS heaters have a titanium stabilized primary heat exchanger with a
MacroChannel
®
secondary heat exchanger (patent pending).
CAUTION
Model UEAS 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.
Form I-UEAS, P/N 221232 R11, Page 3