Periodic Maintenance - Dometic RM2554 Installation & Operating Instructions Manual

maintenance & serVice

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Checking the control system
Check the control system by connecting/disconnecting the
120V AC power, starting/stopping the engine, etc.
Checking the connections
1. 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.
2. Apply a non-corrosive bubble solution to all lP gas
connections. The appearance of bubbles indicates a
leak and should be repaired immediately!
6
eXPLOSION hAZARD. Never use an
open flame to check for gas leaks. Failure
to heed this warning could cause an explo-
sion resulting in death or severe personal
injury.
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.
gas equipment assembly
BURNER MOUNTING
SCREWS
BURNER JET
BURNER TUBE .
SPARK ELECTRODE
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:
1. Turn off the refrigerator.
2. Unplug the power cord from the 120V AC outlet.
Disconnect the wires or shut off the 12V DC power
supply to the refrigerator.
3. Turn off the manual shut off valve.
4. Remove cover from burner housing. Remove the
burner mounting screws and then, the burner as-
sembly.
wARNINg
!
SOLENOID VALVE
MANUAL SHUT OFF VALVE
(Shown in open position)
PRESSURE TEST PORT
5. Remove the wire and flue baffle from the top of the
flue tube.
6. 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.
7. Put back the flue baffle.
8. Clean the burner tube with a brush. Blow out the
burner with compressed air.
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 warning could cause fire result-
ing in personal injury
9. Remove burner jet, but first, clean burner area of
soot and scale that fell out of flue tube.
10. Remove the burner jet.
11. Soak the jet in wood alcohol and blow it out with
compressed air.
12. R einstall and tighten the burner jet.
13. 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).
INLET FITTING
14. Check the electrode for proper location and gap.
1/8" to 3/16"
(3-5 mm)
15. Turn on the manual gas shut off valve.
16. Examine all fittings for leaks. (Use a commercial
non-corrosive bubble solution.)
17. Connect the 120V power cord. Reconnect/turn on
the 12V DC power.
18. Check the LP gas safety shut off.
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wARNINg
!
Electrode
Burner tube