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1. Shut off unit, including pilot. Allow unit to
cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
holes on injector holder for dust and dirt (see
Figure 40).
3. Blow air through ports/slots and holes in
burner (see Figure 41).
4. Check injector holder located at the end
of 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 primary air holes on injector
holder.
6. In case any large clumps of dust have now
been pushed into burner repeat steps 3
and 4.
Clean pilot assembly also. A yellow tip on pilot
flame indicates dust and dirt in pilot assembly.
There is a small pilot air inlet hole about 2"
from where pilot flame comes out of pilot as-
Burner
Tube
Primary Air Inlet Holes (Shape
of Holes May Vary by Model)
Figure 40 - Injector Holder On Outlet
Burner Tube
Note: For proper operation of optional accessories, the wires from the switch to the control
must be connected exactly as shown in Figures 42 and 43.
CAUTION: Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous opera-
tion. Verify proper operation after servicing.
Red
Thermopile
White
Figure 42 - Switch Wiring Diagram
24
clEANiNG AND MAiNTENANcE
Injector Holder
(May Be Brass
or Aluminum
Depending on
Model)
WiRiNG DiAGRAMS
Blue
TPTH
Gas Control
TPTH TP
www.desatech.com
Continued
sembly (see Figure 41). With unit off, lightly
blow air through air inlet hole. You may blow
through a drinking straw if compressed air is
not available.
Burner
Tube
Pilot
Assembly
Figure 41 - Pilot Inlet Air Hole
LOGS
• If you remove logs for cleaning, refer to Install-
ing Logs, page 17, to properly replace logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
BURNER PRIMARY AIR HOLES
Air is drawn into burner through holes in fitting
at burner entrance. These holes may become
blocked with dust or lint. Periodically inspect
these holes for any blockage and clean if
needed. Blocked air holes will create soot.
TH
110/115
V.A.C.
Figure 43 - Blower Wiring Diagram
Variable
Fan Switch
1
Off
Black
2
Blue
On
Black
Green
White
Ports/Slots
Pilot Air
Inlet Hole
Fan Switch
(N.O.)
Red
Blower
Motor
113195-01J
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