Specifications

3
GENERAL SAFETY INFORMATION
Use only the fuel for which the heater is designed (see
rating plate). Using LP gas in a heater that requires
natural gas, or vice versa, will create the risk of gas
leaks, carbon monoxide poisoning and explosion.
Do not attempt to convert the
heater for use with a fuel other than the one
intended. Such conversion is dangerous, as it
will create the risks listed previously.
Make certain that the power source conforms to the
electrical requirements of the heater.
Do not depend upon a thermostat
or other switch as sole means of disconnecting
power when installing or servicing heater. Always
disconnect power at main circuit breaker as
described above. Failure to do so could result in
fatal electric shock.
Special attention must be given to any grounding
information pertaining to this heater. To prevent the risk
of electrocution, the heater must be securely and
adequately grounded. This should be accomplished by
connecting a grounded conductor between the service
panel and the heater. To ensure a proper ground, the
grounding means must be tested by a qualifi ed electrician.
Do not insert fi ngers or foreign objects into the heater or
its air moving device. Do not block or tamper with the
heater in any manner while in operation or just after it
has been turned off, as some parts may be hot enough
to cause injury.
This heater is intended for general heating applications
ONLY. It must NOT be used in potentially dangerous
locations such as fl ammable, explosive, chemical-laden
or wet atmospheres.
In cases in which property damage may result from
malfunction of the heater, a backup system or a
temperature sensitive alarm should be used.
The open end of piping systems being
purged shall not discharge into areas where there are
sources of ignition or into confi ned spaces UNLESS
precautions are taken as follows: (1) by ventilation of
the space, (2) control of purging rate, (3) elimination
of all hazardous conditions. All precautions must be
taken to perform this operation in a safe manner!
Unless otherwise specifi ed, the following conversions
may be used for calculating SI unit measurements:
1 foot = 0.305 m
1 inch = 25.4 mm
1 psig = 6.894 kPa
1 pound = 0.453 kg
1 gallon = 3.785 L
1 cubic foot = 0.028 m
3
Failure to comply with the general
safety information may result in extensive
property damage, severe personal injury or death.
This product must be installed by
a licensed plumber or gas fi tter when installed
within the Commonwealth of Massachusetts.
Installation must be made in accordance with
local codes, or in absence of local codes, with the
latest edition of ANSI Standard Z223.1 (N.F.P.A.
No.54) National Fuel Gas Code. All of the ANSI
and NFPA Standards referred to in these installation
instructions are those that were applicable at the time
the design of this appliance was certified. The ANSI
Standards are available from the American National
Standards Institute, Inc., www.ansi.org. The NFPA
Standards are available from the National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269.
These unit heaters are designed for use in airplane
hangars when installed in accordance with ANSI/NFPA
No. 409 and in public garages when installed in
accordance with NFPA No. 88A and NFPA No. 88B.
If installed in Canada, the installation must conform
with local building codes, or in absence of local building
codes, with CSA-B149.1 “Installation Codes for Natural
Gas Burning Appliances and Equipment" or CSA-B149.2
“Installation Codes for Propane Gas Burning Appliances
and Equipment”. These Unit Heaters have been designed
and certifi ed to comply with CSA 2.6. Also see sections
on installation in AIRCRAFT HANGARS and PUBLIC
GARAGES.
Do not alter the unit heater in any
way or damage to the unit and/or severe personal
injury or death may occur!
Disconnect all power and gas
supplies before installing or servicing the heater.
If the power disconnect is out of sight, lock
it in the open position and tag it to prevent
unexpected application of power. Failure to do
so could result in fatal electric shock, or severe
personal injury.
Ensure that all power sources
conform to the requirements of the unit heater or
damage to the unit will result!
Follow installation instructions CAREFULLY to avoid
creating unsafe conditions. All wiring should be done
and checked by a qualified electrician, using copper
wire only. All gas connections should be made and leak-
tested by a suitably qualifi ed individual, per instructions
in this manual. Also follow procedures listed on the “Gas
Equipment Start-Up Sheet” located in this manual.
1 inch water column = 0.249 kPa
1000 Btu/Cu. Ft. = 37.5 MJ/m
3
1000 Btu per hour = 0.293 kW
liter/second = CFM x 0.472
meter/second = FPM ÷ 196.8