Desa CDR3924NT Owner's Operation And Installation Manual page 19

WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
BURNER INjECTOR HOLDERS AND
pILOT AIR INLET HOLES
The primary air inlet holes 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 in-
let holes prior to each heating season. Blocked
air holes 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
tubes and pilot assembly clean and free of
dust and dirt. To clean these parts we recom-
mend using compressed air no greater than
30 PSI. Your local computer store, hardware
store or home center may carry compressed
air in a can. If using compressed 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 burners, pilot and primary air inlet
holes on injector holder for dust and dirt
(see Figures 28 or 29).
3. Blow air through the ports/slots and holes
in the burners.
4. Check the injector holders located at the end
of the burner tubes 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 holders.
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 assembly. There is a small pilot air
inlet hole about 2" from where the pilot flame
comes out of the pilot assembly (see Figure
30). With the unit off, lightly blow air through
the air inlet hole. The access hole for propane/
LP pilot is on the front of the burner carriage as
shown in Figure 30. The access hole for natu-
122270-01D
CLEANING AND MAINTENANCE
www.desatech.com
Continued
ral pilot is behind the pilot bracket on the top
of burner carriage (see Figure 30). You may
blow through a drinking straw if compressed
air is not available.
Burner
Tube
Primary Air
Inlet Holes
Figure 28 - Injector Holder On Outlet
Burner Tube - Rear Burner
Figure 29 - Injector Holder On Front
Pilot
Assembly
Access Hole
for Cleaning
Propane/LP Pilot
Figure 30 - Cleaning Pilot Air Inlet Hole
(Your pilot may vary from pilots shown)
LOGS
• If you remove logs for cleaning, refer to Install-
ing Logs, page 14, to properly replace logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
Injector Holder
Ports/Slots
Injector Holder
Primary Air
Inlet Holes
Outlet Burner Tube
Access Hole for
Cleaning Natural Pilot
Pilot
Bracket
Pilot Air
Inlet Hole
19