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1) FLAME FAILURE
The electronic safeguard control shuts off the gas supply in .8 seconds if flame is lost to prevent raw gas from leaving
the heater.
2) OVERHEATING
The totally enclosed motor is protected by thermal overload. A high temperature limit switch is mounted in the
control box.
3) COMPLETE VISUAL/SELF DIAGNOSIS LIGHTS
4) BLOCKED AIR SUPPLY
An airflow switch detects the differential pressure in the combustion chamber and shuts off the gas flow when airflow
is insufficient.
5) LOCKING GAS SELECTOR LEVER
To avoid over firing of the heater and damage to property, make sure the lever is locked in position when using propane.
6) LOW SHELL TEMPERATURE/NO VISIBLE FLAME
The 750NEF is designed with a built-in combustion chamber to hide the flame as well as acting as a heat shield.
7) DURABLE CONSTRUCTION
The Model 750NEF uses a heavy gauge steel housing and a stainless steel burner for long life and consistent performance.
NOTE: In order to maintain the highly efficient combustion of the heater, the combustion chamber must remain as
manufactured. Any change or distortion could alter the fuel/air mixture and create excessive products of combustion.
The Heat Wagon Model 750NEF is a direct fired gas heater intended to be used primarily for the temporary heating of
building under construction, alteration, or repair. Since all the products of combustion are released into the area being
heated, it is imperative that adequate ventilation is provided. The flow of supply air and combustion gases must not be
obstructed in any way.
1. The heater is designed for indoor or outdoor installation in a horizontal position. Allow the following clearances
from any combustible material or fuel containers.
Front Outlet:
Intake:
Also make sure that no flammable vapors are present in the space where the heaters is being used.
2. The heater should be inspected before each use, and at least annually by a qualified service person.
3. The hose assembly must be inspected prior to each use of the heater. If it is evident that there is excessive
abrasion or wear, or the hose is cut, it must be replaced prior to the heater being put into operation. The
replacement hose assembly shall be that specified by the manufacturer.
4. When connecting the heater to a natural gas or propane supply line ensure that the pressure at the heater inlet is
within the specified range. Excessive pressure over (14" W.C.) will damage the controls and void the warranty.
5. Connect the hose assembly to the heater gas inlet elbow. The 750NEF elbow has a 1-1/4" female NPT thread,
750NEF elbow has a 1/4" female NPT thread. Ensure that the hose assembly is protected from traffic, building
materials, and contact with hot surfaces.
6. After installation, check hose assembly for gas leaks by applying a soap and water solution to each connection.
7. Connect the heater to an adequate 115 volt electrical supply as specified
on the rating plate. For protection against shock hazard the supply cord
should be plugged directly into a properly grounded three-prong receptacle.
8. Replacement parts are available from any Heat Wagon distributor or by calling 1-888-432-8924.
DESIGN RELATED SAFETY FEATURES
INSTALLATION
20 feet
2 feet
Sides:
2 feet
Top:
4 feet
EXTENSION CORDS:
Properly Wired and Grounded
Use #14 wire up to 100'
Use #12 wire up to 200'
Use #10 wire up to 300'
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