CLEANING AND
MAINTENANCE
WARNING: Turn off heater and let cool before cleaning.
CAUTION:Youmustkeepcon- trol areas, burner 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, bedding material, pet hair, etc.
WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.
ODS/PILOT AND BURNER
Use a vacuum cleaner, pressurized air or small, soft bristled brush to clean.
BURNER PILOT AIR INLET
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 and lint. Clean these air inlet 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 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 (200 kPa). 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 compressed air in a can, please follow the direc- tions 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 for dust and dirt.
3.Blow air through the ports/slots and holes in the burner.
4.Never insert objects into the pilot tube.
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 about two inches from where the pilot flame comes out of the pilot assembly (see Figure 23). With the unit off, lightly blow air through the air inlet. You may blow through a drinking straw if compressed air is not available.
Pilot Assembly
Pilot Air Inlet 
Figure 23 - Pilot Air Inlet
CABINET
Air Passageways
Use a vacuum cleaner or pressurized air to clean.
Exterior
Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.
BATTERIES
During long periods of time when the heater is not being used, take batteries out of receiver and ignitor. Remove exhausted batteries immediately. Do not mix old and new batteries.
SERVICE HINTS
When Gas Pressure Is Too Low
•pilot will not stay lit
•burner will have delayed ignition
•heater will not produce specified heat
•propane/LP gas supply may be low
You may feel your gas pressure is too low. If so, con- tact your local natural or propane/LP gas supplier.
TECHNICAL SERVICE
You may have further questions about installation, operation or troubleshooting. If so, contact DESA Heating Productsʼ Technical Service Department at
You can also visit DESA Heating Productsʼtechni- cal service web site at www.desatech.com.
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