Dometic RM 4223 - Manual (Page 11)

C. Examination and Cleaning of Flue, Burner and Jet
Once or twice a year, look through the opening (see FIG.
9) in the burner box and examine the appearance of the
burner flame which should be predominantly blue in
color when the gas thermostat knob is set to its highest
position. (Refer to FIG. 10).
If this is not the case, clean the flue, burner, jet, etc. (see
section D and E).
D. Cleaning of Burner, Burner Jet (Refer to FIG.11)
Proceed as follows:
1) Turn off the gas at the gas bottle.
2) By using a phillips screwdriver, remove the screw (B)
and carefully withdraw the burner cover box. Clean
the inside of the box of soot and other deposits.
3) To clean the burner, unscrew the screw (C) that fixes
the burner on the boiler tube and be careful in order
not to lose the washer.
4) Clean the inside of the burner.
5) To examine and eventually clean the burner jet,
unscrew the gas pipe union (K) and pull out the
burner jet (L).
6) Clean the jet by washing it in alcohol and blowing it
through with air.
DO NOT use a wire or pin when cleaning the
burner jet as damage can occur to the precision
opening. This can cause damage to the
refrigerator or create a fire hazard.
NOTE: The jet fitted to this refrigerator is a size
"43" which is suitable for use on propane gas at
11 inches water column. The orifice in the jet is
very small and must never be cleaned by means
of a pin or similar instrument as this would
damage the orifice. It must only be cleaned as
described above.
7) Reassemble the components in the reverse order to
that described above.
E. CLEANING OF FLUE TUBE, FLUE BAFFLE
Proceed as follows:
1) To clean the flue tube and the flue baffle, it is neces
sary to withdraw the refrigerator out of the recess.
See Section D, Item 1.
2) By using a phillips screwdriver, remove the screw (B,
in FIG. 11) and carefully withdraw the burner cover
box.
3) Place a piece of paper or cloth between the boiler
tube (E, in FIG. 11) and the burner assembly, to catch
falling deposits.
4) Remove the "T-piece" (A, in FIG. 12) at the top of the
flue by unscrewing the screw (B, in FIG. 12) that fixes
it to the flue pipe.
5) Carefully takeout the flue baffle (C, FIG. 12) and
clean.
6) Clean the flue tube of soot, etc. with the aid of a spe
cial flue brush, available from your supplier.
11
FIG. 9
FIG. 10
CLEAR BLUE COLOR OF FLAME
FIG. 11
FIG. 12
OPENING IN
BURNER BOX
! CAUTION