Desa VUL18 - Manual (Page 27)

www.desatech.com 119426-01A 27
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 holes 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
2" from where the pilot flame comes out of the
pilot assembly (see Figure 41). With the unit off,
lightly blow air through the air inlet hole. You may
blow through a drinking straw if compressed air
is not available.
CLEANING AND
MAINTENANCE
Continued
LOGS
• If you remove logs for cleaning, refer to Install-
ing Logs, page 18, to properly replace logs.
• Replace log(s) if broken or chipped (dime-sized
or larger).
MAIN BURNER
Periodically inspect all burner flame holes with
the heater running. All slotted burner flame holes
should be open with yellow flame present. All
round burner flame holes should be open with a
small blue flame present. Some burner flame holes
may become blocked by debris or rust, with no
flame present. If so, turn off heater and let cool.
Remove blockage, blocked burner flame holes
will create soot.
Figure 40 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Injector Holder
Primary Air
Inlet Holes
Ports/Slots
Figure 41 - Pilot Inlet Air Hole (Your pilot
may vary from pilot shown)
Pilot Air
Inlet Hole
Pilot Assembly
WIRING DIAGRAM
(Remote-Ready Models Only)
Thermopile