SERVICING
A hazardous condition may result if a heater is used
that has been modified or is not functioning properly.
When the heater is working properly:
o
The flame is contained within the heater with
perhaps some yellow tippng from the exit cone.
o
There is no strong disagreeable odor, eye
burning or other physical discomfort.
o
There is no smoke or soot internal or external
to the heater.
o
There are no unplanned or unexplained
shutdowns of the heater.
The parts list and wiring diagram show the heater as
it was constructed. Do not use a heater which is different
from that shown. Heater performance is effected by air
pressure setting. If there is any uncertainty about the air
pressure setting, have it checked.
A heater which is not working right must be repaired,
but only by a trained, experienced service person. Con-
tact the factory for the service center closest to you, phone
909/981-5343.
You may also obtain in warranty or out of warranty
service by returning the product freight prepaid to:
Scheu Products Company
8855 Baker Avenue
Rancho Cucamonga, CA 91730
Contact customer service for Return Goods Authori-
zation Number.
In warranty products returned to the Service Depart-
ment will be repaired with no charge for either parts or
labor and will be returned to you freight prepaid. Please
include a brief statement indicating date and place of
purchase and the nature of the problem, and proof of
purchase.
Out of warranty products returned to the Service De-
partment will be repaired with a charge for parts and
labor and will be returned to you freight collect.
MAINTENANCE
WARNING: To prevent personal injury, unplug the heater
form the wall outlet before servicing.
For maximum efficiency and trouble-free service make
the following periodic maintenance cleaning and in-
spections.
DAILY SCHEDULE
1. GENERAL. Make general visual inspection of heater
for loose or damaged parts. Check nuts and bolts to
insure against looseness caused by vibration or rough
handling. Damaged parts should be repaired or re-
placed before using heater again. Check heater opera-
tion to be sure it is operating normally (See "Servicing"
section for description of normal operation).
2. FILTERS. Dirty air or oil filters will cause an imbalance
in the air-fuel mixture. The best indication that this
condition exists is an increase in odors or difficulty
getting your heater to ignite. This heater should never be
operated without the filters in place. If required clean
filters as described under "500 HR" and "Annual Sched-
ules".
2. REMOVE DUST: Clean heater twice a season (more
often under dusty conditions). Remove accumulated
dust from the transformer, burner, motor and fan blades
with compressed air. Wipe area clean with a clean dry
cloth. Inspect area to insure all foreign materials are
removed, especially around the burner and combustion
area.
3. CAD CELL: Clean the glass portion of the cad cell with
a soft dry cloth.
4. NOZZLE: Accumulation of dirt from fuel and carbon
from the compressor vanes will eventually fill up the
passages in the nozzle, resulting in reduction of fuel and
air flow. Pressure will gradually increase giving improper
fuel-air mixture and excess odor and smoke. If this
occurs, replace the fuel nozzle.
5. FUEL TANK: Clean twice a season (during frequently
used periods clean twice a month). Drain and flush the
fuel tank with clean fuel oil.
6. SPARK PLUG: Remove and clean the spark plug. Ad-
just spark plug gap to 1/16".
ANNUAL SCHEDULE
1. AIR OUTPUT FILTER: Remove the air output filter and
tap the contaminated side gently on a solid object to
remove contaminates.
Compressed air or liquids should not be used to clean
this filter. Reinstall cleaned filter in filter body in the
same position as it was when removed. If the filter
appears extremely dirty, replace it with a new filter of the
same type. When replacing the filter cover, be sure the
gasket is firmly in place and the screws in the filter cover
are tight to prevent air leaks.
2. FUEL FILTER: Remove the fuel filter from fuel line and
direct compressed air through the filter in the opposite
direction of fuel flow. Safety glasses should be worn
when using compressed air.
3. AIR AND FUEL LINES: If the air or fuel lines are re-
moved during cleaning, be sure all connections are tight
before operating unit.
4. AIR PRESSURE SETTING: The air pressure has been
properly set at the factory. If the air pressure is out of
adjustment, it will most likely be caused by dirty air
filters, a partially plugged nozzle, an air leak in the
system or improperly set pressure.
If adjustment becomes necessary, first determine the
proper pressure setting for your heater which is printed on
the serial label, located on the fuel tank.
Remove the plug from the air filter cover and attach an
accurate pressure gauge calibrated to a maximum reading
of 15 PSI. Start the heater and note the pressure reading.
If the pressure is low, slowly turn the pressure adjusting
screw in (clockwise) until the correct pressure is obtained.
If the air pressure is high, turn the adjusting screw out
(counter-clockwise) until the pressure is correct.
When correct pressure is reached, unplug the heater,
remove the gauge and replace the plug.
STORAGE
Store the heater in a dry location free from fumes or dust.
At the end of each heating season clean the heater as
described in the MAINTENANCE section. Drain and flush
the fuel tank with clean fuel. The manufacturer recom-
mends completely filling the tank with fuel for extended
storage to minimize condensation inside the tank.
500 HOUR SCHEDULE
1. AIR INTAKE FILTER: Remove and wash the filter
element with a mild detergent, dry thoroughly and
replace. Do not oil the filter element. If your heater is
used where there is considerable dust or dirt, clean as
often as necessary (approximately 50 hrs.).
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