CLEANING AND MAINTENANCE
Continued
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 35).
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 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 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 36). 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.
Burner Tube
Injector Holder
Primary Air
Inlet Holes
Ports/Slots
Burner Tube 
Pilot Assembly 
Pilot Air
Inlet Hole
Figure 36 - Pilot Inlet Air Hole
LOGS
•If you remove logs for cleaning, refer to Installing Logs, page 16, 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 pres- ent. 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 35 - Injector Holder On Outlet
Burner Tube
Service Hints
When Gas Pressure Is Too Low
•pilot will not stay lit
•burners will have delayed ignition
•heater will not produce specified heat
•for propane/LP units, propane/LP gas sup- ply may be low
You may feel your gas pressure is too low. If so, contact your local propane/LP or natural gas supplier.
Technical Service
You may have further questions about installa- tion, operation, or troubleshooting. If so, contact DESA Heating, LLC at
You can also visit DESA Heating, LLC’s web site at www.desatech.com.
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