Dometic NDA1402 Installation And Operating Instructions Manual page 16

FIG. 16
BURNER TUBE .
D. Inspect the flue baffle. It should be reasonably clean
and free of soot. Heavy soot formation indicates im-
proper functioning of the burner. The flue and burner
both require cleaning in the following manner:
1. Unplug the refrigerator power cord from the 120 volt
AC outlet. (See FIG. 3).
2. Disconnect or shut off the 12 volt power to the refrig-
erator.
3. Turn manual shut off valve to OFF. (See FIG. 1).
4. Remove cover from the burner housing. (See FIG. 1).
5. Remove the burner mounting screws and remove the
burner assembly. (See FIG. 16).
6. Remove the wire and the flue baffle from the top of
flue tube. Clean the flue from the top using a flue
brush. Blowing compressed air into the flue will not
properly clean soot and scale out of the flue tube.
Replace the flue baffle.
7. Clean burner tube with a brush. Blow the burner clean
with compressed air.
8. Before removing burner jet, clean burner area of soot
and particles falling from the flue tube. Remove the
burner jet. Soak the jet in wood alcohol and blow it
with compressed air. Reinstall and tighten burner jet.
NOTE: The color of the flame shall be clear blue
over the slots of the burner. (See FIG. 17).
FIG. 17
GAS EQUIPMENT ASSEMBLY
BURNER MOUNTING
SCREWS
BURNER JET
SPARK ELECTRODE
Clear blue color
of flame
SOLENOID VALVE
MANUAL SHUTOFF VALVE
Shown in open position
PRESSURE TEST PORT
! WARNING
DO NOT use a wire or pin when cleaning the burner
jet as damage can occur to the precision opening.
This could be extremely hazardous.
9. Reinstall burner, being careful that the end of the
burner fits into the slot on the burner bracket. Check
to make sure slots are centered under the flue tube.
10. Check the electrode for proper location and gap.
(See FIG. 18).
FIG. 18
1/8" to 3/16"
(3-5 mm)
11. Turn on manual gas shut off valve and check all
fittings for leaks.
12. Connect 120 volt power cord to the outlet and re-
connect or turn on the 12 volt DC power.
13. Check LP gas safety shut off. See page 7.
INLET FITTING
Electrode
Burner tube
17