Maint. & Service - Dometic RM 2552 Installation And Operating Instructions Manual

1. CARTRIDGE HEATER
The heat necessary for the operation of an absorption
cooling unit is supplied by an electric heater mounted in
a pocket of the boiler system.
Model RM 2552 is equipped with one electric heater for
120 volt AC.
Model RM 2553 is equipped with two electrical heaters,
one for 120 volt AC and one for 12 volt DC.
To replace the heater proceed as follows:
1. Before working on the refrigerator make sure that 120
volt AC and optional 12 volt DC leads are disconnec-
ted. Shut off Gas valve.
2. Remove the terminal block cover see FIG. 1
3. Disconnect the heater leads.
4. With a pair of pliers unfold the lug holding the lid of
the boiler casing and open the lid.
5. Remove some insulation wool so that the heater is
accessible.
6. Turn and lift the heater out of its pocket.
7. Fit the new heater into the pocket.
8. Connect the leads and put on the terminal block
cover.
9. Reset the insulation and close the lid of the boiler.
2. REFRIGERATOR REMOVAL
Before working on the refrigerator, make sure the AC
voltage and DC voltage leads are disconnected. Shut off
the gas supply. Disconnect the gas supply line at the rear
of the refrigerator, see FIG. 1. Always use a back up
wrench when loosening and tightening this connection.
Cap the gas supply line, loosen the screws anchoring
the refrigerator to the enclosure and slide the refrigerator
out of the compartment.
When replacing the refrigerator make sure that the
sealing strips are properly positioned.
Replacement is the reverse of removal. Check all con-
nections for gas leaks.
Refer to section INSTALLATION, page 4 to 8.
FIG. 12
MAINTENANCE AND SERVICE
GAS EQUIPMENT ASSEMBLY
MANUAL SHUT OFF VALVE.
Shown in open position
Use a quarter dollar or a slotted screwdriver to change position.
INLET FITTING
PRESSURE TEST PORT
3. PERIODIC MAINTENANCE
To keep your Dometic refrigerator operating efficiently
and safely, periodic inspection and cleaning of several
components once or twice a year is recommended.
A. It is important to keep the area at the back of the
refrigerator clean. Check the lower vent, upper vent
and area between these openings for any obstruc-
tions such as bird/insect nests, spider webs, etc.
Clean the coils on the back of the refrigerator. Use a
soft bristled brush to dust off the coils.
It is important to keep the refrigerator area free from
combustible material, gasoline and other flammable
vapors or liquids.
NOTE: AVOID SPRAYING WATER THROUGH
THE REFRIGERATOR VENTS WHILE WASHING
YOUR RV.
B. 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 ap-
pearance of bubbles indicates a leak and should be
repaired immediately by a QUALIFIED SERVICE-
MAN WHO IS FAMILIAR WITH GAS SYSTEM AND
REFRIGERATORS.
DO NOT use a flame to check for gas leaks.
NOTE: The following maintenance is required once or
twice a year, but should only be done by a qualified
serviceman who is familiar with LP gas systems and
refrigerators.
C. The LP gas pressure should be checked and the
main regulator readjusted if pressure is incorrect. The
correct operating pressure is 11 inches of water
BURNER JET
WARNING
NUT
THERMOCOUPLE
SPARK ELECTRODE
BURNER TUBE
BURNER MOUNTING SCREW
11