Dometic RM2551 - Manual (Page 14)

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perioDic maintenance
checking the control system
Check the control system by connecting/disconnecting the
120V aC power, starting/stopping the engine, etc.
checking the connections
Check all connections in the lP gas system (at the
back of the refrigerator) 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 lp gas pressure
The lP gas pressure should be checked and the main regulator
readjusted if pressure is incorrect. The correct operating pres-
sure is 11 inches of water column. Measure the lP gas pressure
at the test port, just ahead of the burner jet.
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.
To clean the flue and burner, follow these steps:
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 shut off valve.
Remove cover from burner housing. Remove the
burner mounting screws and then, the burner as-
sembly.
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2.
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4.
Remove the wire and flue baffle from the top of the
flue tube.
using a flue brush, clean the flue from the top. Blow-
ing 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.
Remove burner jet, but first, 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 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 thermo-
couple is positioned properly (tip of thermocouple
extends over two slots of burner).
Check the electrode for proper location and gap.
Turn on the manual gas shut off valve.
Examine all fittings for leaks. (use a commercial
non-corrosive bubble solution.)
Connect the 120V power cord. Reconnect/turn on
the 12V DC power.
Check the lP gas safety shut off.
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maintenance & service
BURNER TUBE .
SPARK ELECTRODE
BURNER JET
BURNER MOUNTING
SCREWS
PRESSURE TEST PORT
MANUAL SHUT OFF VALVE
(Shown in open position)
INLET FITTING
SOLENOID VALVE
gas equipment assembly
Electrode
Burner tube
1/8” to 3/16”
(3-5 mm)
4HE
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 !