www.desatech.com
120163-01A
20
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burners and
circulating air passageways
of heater clean. Inspect these
areas of heater before each use.
Have heater inspected yearly
by a qualified service person.
Heater may need more frequent
cleaning due to excessive lint
from carpeting, pet hair, bedding
material, etc.
WARNING: Failure to keep
the primary air openings of the
burner clean may result in soot
-
ing and property damage.
BURNER INjECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet openings allow the proper
amount of air to mix with the gas. This provides
a clean burning flame. Keep these holes clear of
dust, dirt, lint and pet hair. Clean these air inlet
openings prior to each heating season. Blocked
air openings will create soot. We recommend
that you clean the unit every three months during
operation and have heater inspected yearly by a
qualified service person.
We also recommend that you keep the burner
tube and pilot assembly clean and free of dust and
dirt. To clean these parts we recommend using
compressed air no greater than 30 PSI. Your local
computer store, hardware store or home center
may carry compressed air in a can. You can use a
vacuum cleaner in the blow position. If using com-
pressed air in a can, please follow the directions on
the can. If you don't follow directions on the can,
you could damage the pilot assembly.
1. Shut off the unit, including the pilot. Allow
the unit to cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
opening on injector holder for dust and dirt
(see Figure 26).
Figure 26 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Injector
Holder
Injector
Primary Air
Inlet Opening
(At Bottom)
Ports
Slots
Figure 27 - Pilot Inlet Air Hole (Your pilot
may vary from pilots shown)
Pilot Assembly
Pilot Air Inlet Hole
Pilot Assembly
Pilot Air Inlet Hole
3. Blow air through the ports/slots and holes in
the burner.
4. Check the injector holder located at the end
of the burner tube again. Remove any large
particles of dust, dirt, lint or pet hair with a
soft cloth or vacuum cleaner nozzle.
5. Blow air into the primary air opening on the
injector holder.
6. In case any large clumps of dust have now been
pushed into the burner repeat steps 3 and 4.
Clean the pilot assembly also. A yellow tip on the
pilot flame indicates dust and dirt in the pilot as-
sembly. There is a small pilot air inlet hole about
two inches from where the pilot flame comes out
of the pilot assembly (see Figure 27). With the
unit off, lightly blow air through the air inlet hole
in the same direction as gas flow. You may blow
through a drinking straw if compressed air is not
available. This hole is accessible from the front
of the unit through an L-shaped hole in the valve
bracket (see Figure 28, page 20).
Natural
Propane/LP
