Dometic RM3962 - Manual (Page 10)

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clEaning thE flUE bafflE and bURnER
Inspect the flue baffle. It should be reasonably clean and free of
soot. Heavy soot formation indicates improper functioning
of the burner.
The flue and burner require cleaning in the following manner:
Turn off the refrigerator. unplug the power cord
from the 120V aC outlet. Disconnect the wires or
shut off the 12V DC power supply to the refrigerator.
Turn off the manual shutoff valve. 1.
2.
Remove the cover from the burner housing. Remove
the burner mounting screws and then the burner as-
sembly.
Remove the wire and flue baffle from the top of the
flue tube. using a flue brush, clean the flue from the
top. (Blowing compressed air into the flue will not
properly clean soot and scale out of the flue tube.)
Put back the flue baffle.
Clean the burner tube with a brush. Blow out the
burner with compressed air.
Before removing the burner jet:
Clean burner area of soot and scale that fell out of
flue tube.
Remove the burner jet.
soak the jet in wood alcohol and blow it out with
compressed air.
Reinstall and tighten the burner jet.
Reinstall the burner. Ensure that the end of the
burner fits into the slot on the burner bracket. Verify
that the slots are centered under the flue tube and the
thermocouple is positioned properly (tip of thermo-
couple extends over two slots of burner).
Check the electrode for proper location and gap.
Turn on the manual gas shutoff valve.
Examine all fittings for leaks. (use a solution of
liquid detergent and water.)
Connect the 120V power cord. Reconnect/turn on
the 12V DC power.
Check the LP gas safety shutoff.
3.
4.
5.
6.
7.
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10.
11.
12.
13.
maintEnancE & SERvicE
chEcking thE connEctionS
LP gas is a flammable gas which has the potential to create a
hazard. Do not smoke or create sparks when working on or
near the LP gas system.
Check all connections in the LP gas system for gas
leaks. The LP gas supply must be turned on.
apply a non-corrosive bubble solution to all LP gas
connections. The appearance of bubbles indicates a
leak and should be repaired immediately!
chEcking thE contRol SyStEm
Check the control system by connecting/disconnecting the
120V aC power, starting/stopping the engine, etc.
chEcking thE lP gaS PRESSURE
The LP gas pressure should be checked and the main regulator
readjusted if the pressure is incorrect. The correct operating
pressure is 11 inches of water column. Measure the LP gas
pressure at the test port, just ahead of the burner jet.
1.
2.
gas equipment assembly
INLET FITTING
NUT
MANUAL SHUTOFF VALVE .
Shown in open position
PRESSURE TEST PORT .
BURNER JET . BURNER MOUNTING SCREW
BURNER TUBE
SPARK ELECTRODE
THERMOCOUPLE
SOLENOID VALVE .
"E
%LECTRODE
"URNER
v
FIRE HAZARD. Do not use a wire or pin when
cleaning the burner jet as damage can occur to
the precision opening. Failure to heed this warn-
ing could cause fire resulting in personal injury.
WARNING !
EXPLOSION HAZARD. Never use an open
flame to check for gas leaks. Failure to heed this
warning could cause an explosion resulting in
death or severe personal injury.
WARNING !