L.B. White AW250, Owner'S Manual And Instructions

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1. Do not attempt to install, repair, or service this heater
or the gas supply line unless you have continuing
expert training and knowledge of gas heaters.
Qualifications for service and installation of this
equipment are as follows:
a. To be a qualified gas heater service person, you
must have sufficient training and experience to
handle all aspects of gas-fired heater installation,
service and repair. This includes the task of
installation, troubleshooting, replacement of
defective parts and testing of the heater. You
must be able to place the heater into a continuing
safe and normal operating condition. You must
completely familiarize yourself with each model
heater by reading and complying with the safety
instructions, labels, Owner’s Manual, etc., that is
provided with each heater.
b. To be a qualified gas installation person, you must
have sufficient training and experience to handle
all aspects of installing, repairing and altering gas
lines, including selecting and installing the proper
equipment, and selecting proper pipe and tank
size to be used. This must be done in accordance
with all local, state and national codes as well as
the manufacturer’s requirements.
2. All installations and applications of L. B. White
heaters must meet all relevant local, state and
national codes. Included are applicable fuel gas
systems, gas installation, electrical, and safety codes.
Yo u r l o c a l f u e l g a s s u p p l i e r, a l o c a l l i c e n s e d
electrician, the local fire depar tment or similar
government agencies, or your insurance agent can
help you determine code requirements.
3. Do not move, handle, or service heater while in
operation or connected to a power or fuel supply.
4. This heater may be installed in areas subject to
washdown. This heater may only be washed on the
external case assembly—see Cleaning Instructions.
Do not wash the interior of the heater. Use only
compressed air, soft brush or dry cloth to clean the
interior of the heater and it’s components. After
external washdown, do not operate this heater until it
is completely dry. In any event, do not operate the
heater for at least one hour after external washdown.
5. For safety, this heater is equipped with a manual
reset high-limit switch and an air flow switch. Never
operate this heater with any safety device that has
been bypassed. Do not operate this heater unless all
of these features are fully functioning.
6. Do not operate the heater with its door(s) open.
7. Do not locate fuel gas containers or fuel supply hoses
within 6,10 meters of the blower outlet of the heater.
8. Do not block air intakes or discharge outlets of the
appliance. Doing so may cause improper combustion
or damage to heater components leading to property
damage or animal loss.
9. The hose assembly shall be visually inspected on an
annual basis. If it is evident there is excessive
abrasion or wear, or if the hose is cut, it must be
replaced prior to the heater being put into operation.
The hose assembly shall be protected from animals,
building materials, and contact with hot surfaces
during use. The hose assembly shall be that
specified by the manufacturer. See parts list.
10. Check for gas leaks and proper function upon heater
installation, before building repopulation or when
relocating.
11. This heater should be inspected for proper operation
by a qu a l i f i e d s e r v i c e p e r s o n b e fo r e b u i l d i n g
repopulation and at least annually.
12. Always turn off the gas supply to the heater if the
appliance is not going to be used in the heating of
livestock.
13. This heater is wired for a three-wire electrical system.
There is a hot lead, neutral lead and ground lead.
The heater may or may not incorporate a plug in the
power cord to the heater and the plug may or may not
incorporate a pin for the ground wire. In any case,
the heater must be properly connected into a
grounded electrical supply using the ground lead in
the power cord. Failure to use a properly grounded
electrical supply can result in electrical shock,
personal injury or death.
14. Hot surface ignition heaters will make up to three
trials for ignition. If ignition is not achieved after the
third trial, the control system will “lock out” the gas
control valve. If gas is smelled after system lock out
has occurred, immediately close all fuel supply
valves. Do not relight until you are sure that all gas
that may have accumulated has cleared away. In any
event, do not relight for at least 5 minutes.
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 LP-gas and natural gas in a hanging
type of installation.
16. Installations not using the gas hose supplied with this
heater must connect dimensionally using BS1387
Medium Duty Galvanized Steel Tube. (Aluminum
piping or tubing shall not be used.)
6
Safety Precautions