L.B. White AW250 - Manual (Page 7)

1. Read all safety precautions and follow L. B. White
recommendations when installing this heater. If
during the installation or relocating of heater, you
suspect that a part is damaged or defective, call a
qualified service agency for repair or replacement.
2. Make sure the heater is properly positioned before use
and is hung level. Observe and obey all minimum safe
distances of the heater to the nearest combustible
materials. Minimum safe distances are given on the
heater nameplate and on page 4 of this manual.
3. For heaters intended for outdoor installation, the
heater is to be installed at least 18 inches above the
ground or to a height that would prevent snow
blockage of heater’s air inlet.
4. The heater may be used either indoors or outdoors.
When the heater is mounted outdoors, use only the
ductwork supplied in the outdoor mounting kit.
5. The heater must have the proper gas regulator installed
for the application. A regulator must be connected to
the gas supply so that gas pressure at the inlet to the
gas valve is regulated within the range specified on the
dataplate at all times. Contact your gas supplier, or the
L.B. White Co., Inc. if you have any questions.
6. The heater’s gas regulator (with pressure relief valve)
should be installed outside of building. Any
regulators inside the buildings must be properly
vented to the outside. Local, state and national
codes always apply to regulator installation. Natural
gas regulators with vent limiting device may be
mounted indoors without venting to outdoors.
7. All gas pressure regulators must be installed in strict
accordance with the manufacturer’s safety instructions.
These instructions accompany each regulator.
8. Insure that all accessories that ship within the heater
have been removed from inside of heater and
installed. This pertains to air diverters, hose,
regulators, etc.
9. Make certain that a sediment trap is installed at the
gas valve inlet to prevent foreign materials (pipe
compound, pipe chips and scale) from entering the
gas valve. Debris blown into the gas valve may cause
that valve to malfunction resulting in a serious gas
leak that could result in a possible fire or explosion
causing loss of products, building or even life. A
properly installed sediment trap will keep foreign
materials from entering the gas valve and protect the
safe functioning of that important safety component.
10. Any heater connected to a piping system must have
an accessible, approved manual shut off valve
installed within six feet (6 ft.) of the appliance it
serves.
11. Check all connections for gas leaks using approved
gas leak detectors. Gas leak testing is performed as
follows:
-- Check all pipe connections, hose connections,
fittings and adapters upstream of the gas
control with approved gas leak detectors.
-- In the event a gas leak is detected, check the
components involved for cleanliness and
proper application of pipe compound before
further tightening.
-- Furthermore tighten the gas connections as
necessary to stop the leak.
-- After all connections are checked and any
leaks are stopped, turn on the main burner.
-- Stand clear while the main burner ignites to
prevent injury caused from hidden leaks that
could cause flashback.
-- With the main burner in operation, check all
connections, hose connections, fittings and
joints as well as the gas control valve inlet and
outlet connections with approved gas leak
detectors.
-- If a leak is detected, check the components
involved for cleanliness in the thread areas
and proper application of pipe compound
before further tightening.
WARNING
Fire oor eexplosion hhazard.
Can ccause pproperty ddamage, ssevere iinjury oor ddeath.
1. Disconnect power supply before wiring to prevent
electrical shock or equipment damage.
2. To avoid dangerous accumulation of fuel gas, turn off
gas supply at the heater service valve before starting
installation, and perform gas leak test after
completion of installation.
3. Do not force the gas control knob. Use only your
hand to turn the gas control knob. Never use any
tools. If the knob will not operate by hand, the
control should be replaced by a qualified service
technician. Force or attempted repair may result in
fire or explosion.
15. In a hanging type installation, rigid pipe or copper
tubing coupled directly to the heater may cause gas
leaks during movement, and therefore must not be
used. Use only gas hose assemblies that are rated
and approved for L.P.gas and natural gas in a hanging
type of installation.
16. Installations not using the gas hose supplied with
this appliance must connect dimensionally using
American National Standard Wrought Steel and
Wrought Iron Pipe B36/10-1970. (Aluminum piping
or tubing shall not be used.) Copper tubing when
used for conveying natural gas, shall be internally
tinned or equivalently treated to resist sulphur.
7
Installation Instructions
GENERAL