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IN UNITED STATES: Refer to Standard for Aircraft Hangars, ANSI/
NFPA 409 (latest edition).
1. In aircraft storage and servicing areas, heaters shall be installed at
least 10 ft. (3 m) from above the upper surface of wings or of the
engine enclosures of the highest aircraft that may be housed in the
hangar. The measurement shall be made from the wing or engine
enclosure, whichever is higher from the floor, to the bottom of the
heater.
2. In areas adjoining the aircraft storage area (e.g., shops, offices) the
bottom of heaters shall be installed no less than 8 ft. (2.4 m) above
the floor.
3. Heaters should be located so as to be protected from damage
from aircraft or other appliances needed for servicing of aircraft.
Refer to requirements of the enforcing authorities. Provisions shall
be made to assure accessibility to suspended heaters for recurrent
maintenance purposes.
For installation in hangars, these units must be installed so that
burners and ignition source are located no less than 18" (457mm)
above floor. Heater must be located or protected to avoid physical
damage by vehicles. Refer to CSA B149.1, Natural Gas and Propane
Installation Code current edition.
IN CANADA: In a confined area, the heater must be installed in
accordance with the CSA B149.1, Natural Gas and Propane Installation
Code. Be sure to check with local codes and ordinances for additional
requirements.
NON-STANDARD BTU GAS
Unless otherwise noted on the rating plate, this heater is designed and
orificed to operate on standard BTU gas. Contact the factory if utilizing
non-standard BTU gas.
INTRODUCTION
This heater is a gas-fired unit heater. This manual provides specific
information related to the Mr. Heater models. All persons involved with
the installation, operation, and maintenance of the heater must read
and understand the information in this manual.
The intent of this manual is to provide information regarding safety,
design guidelines, installation, operation, and maintenance of the this
gas-fired unit heater. You must read and understand the instructions
and all safety warnings before installing the gas-fired unit heater. This
manual is property of the owner and must stay with the owner or unit
after installation is complete.
CLEARANCES TO COMBUSTIBLES
Clearance to combustibles is defined as the minimum distance
that must exist between the specified feature of the heater and
any combustible items. It also pertains to the distance that must
be maintained from moving objects around the unit heater. A
recommended service clearance is defined as the minimum distance
that is needed to properly service the heater. When installing the
unit heater, clearances to combustible for the model heater must be
maintained. Refer to Table 3 to determine the required distances for
your model.
WARNING: Placement of explosive objects, flammable
objects, liquids, and vapors close to the heater may result in
explosion, fire, property damage, serious injury, or death.
Do not store or use explosive objects, liquids, or vapor in the
vicinity the heater.
Access
Unit Side
Clearance to
Combustibles
Clearance to
Allow Service
HEATER COMPONENTS
Prior to installation, verify that the heater's gas type and voltage (as
listed on the rating plate) match that of your application. The heater
is standard produced for operation with natural gas. In case of use
with LP / propane gas, see Fuel Conversion instructions. Also verify
that you have received the entire heater contents included with your
unit. Materials not included with the unit (e.g. screws, vent material,
threaded rod, etc.) are the responsibility of the installer. Notify your
product representative or the factory of any discrepancy of missing
items prior to installing the unit.
5
Large Unit Heater
Operating Instructions and Owner's Manual
Clearances To Combustibles
Front View
Top
Side
Bottom
Side View
Top
Rear
Bottom
FIGURE 2
Front
Top and
Access
Bottom
60"
6"
60"
18"
TABLE 3: Clearances To Combustibles
Non-Access
Side
Front
Non-
Rear
Vent
Side
Access
Connection
Side
6"
6"
18"
6"
29"
18"
18"
18"
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