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OPERATING INSTRUCTIONS

IMPORTANCE OF LEVELING A
REFRIGERATOR

In an absorption refrigerator system, ammonia is lique-
fied in the finned condenser coil at the top rear of the
refrigerator. The liquid ammonia then flows into the
evaporator (inside the freezer section) and is exposed
to a circulating flow of hydrogen gas, which causes the
ammonia to evaporate, creating a cold condition in the
freezer.
The tubing in the evaporator section is specifically
sloped to provide a continuous movement of liquid am-
monia, flowing downward by gravity through this section.
If the refrigerator is operated when it is not level and the
vehicle is not moving, liquid ammonia will accumulate in
sections of the evaporator tubing. This will slow the
circulation of hydrogen and ammonia gas, or in severe
cases, completely block it, resulting in a loss of cooling.
Any time the vehicle is parked for several hours with the
refrigerator operating, the vehicle should be leveled to
prevent this loss of cooling. The vehicle needs to be
leveled only so it is comfortable to live in (no noticeable
sloping of floor or walls).
When the vehicle is moving, the leveling is not critical,
as the rolling and pitching movement of the vehicle will
pass to either side of level, keeping the liquid ammonia
from accumulating in the evaporator tubing.

GAS OPERATION

Before starting the refrigerator, check that all the manual
gas valves are in the ON position. DO NOT forget the
manual shutoff valve on the rear of the refrigerator, see
FIG. 1.
1.

To start the refrigerator, turn knob A to the "GAS"
position.

2.

Turn the thermostat knob B to position 4.

3.

Press the button C to stop and keep it depressed.
When the gas is lit at the burner the RED indicator D
is on the GREEN field, (ON).

4.

If the RED indicator D is not on the GREEN field,
repeat the procedure. If flame blows out, the reigniter
will automatically relight the burner.

5.

To shut off the refrigerator turn the knob A to
"OFF" position.

NOTE: After changing an LP tank, or after a long shut
off period, the gas line is likely to be filled with air. You
may have to repeat the lighting procedure several times
to purge the air out of the gas lines.
As soon as the necessary cold temperature inside the
cabinet has been reached, adjust the thermostat knob
to required setting.

WARNING

Most LP gas appliances used in recreational ve-
hicles are vented to the outside of the vehicle.
When parked close to a gasoline pump, it is
possible that the gasoline fumes could enter
this type of appliance and ignite from the
burner flame, CAUSING A FIRE OR AN EXPLO-
SION.

FOR YOUR SAFETY, it is recommended that all
LP gas appliances which are vented to the out-
side should be shut off when refueling.

ELECTRIC OPERATION

1.

Check to be sure the power cord is properly connec-
ted to the power supply. See FIG. 11). If the refrige-
rator is equipped for 12 volt DC operation, the tow
vehicle or caravan engine should be running to pre-
vent discharging the battery.

2.

Turn the knob A to the position marked "AC" for 120
volt AC operation or "DC" for 12 volt DC operation.

3.

Turn the thermostat knob B to position 4.

4.

To shut off the refrigerator turn the knob A to
"OFF" position.

THERMOSTAT

The refrigerator is equipped with a thermostat that can
be adjusted by turning the knob B to different setting to
maintain the desired cabinet temperature.
At OFF In gas operation, the thermostat closes its

main valve and the burner runs continuously
at the bypass rate, just enough to keep the
burner lit. In electrical operation, the contacts
in the thermostat are open and the heating
elements are off.

At MAX In gas operation, the thermostat allows the

burner to remain on high flame continuously.
In electric operation, the heating element is
"ON" continuously. Lowest cabinet and freez-
er temperatures are obtained at this setting.

The thermostat can be adjusted between "MAX" and
"OFF" to obtain the desired cabinet temperature.
The closer the knob is to "MAX" - the colder the cabinet
temperature. The closer the knob is to "OFF" - the
warmer the cabinet temperature.
When the thermostat reaches the set temperature, it will
cut the burner back to bypass or, in electric operation,
shut off the heating element.
The setting of the thermostat is not critical, but we
recommend it be adjust to maintain a dry frost on the
cooling fins. Adjust the thermostat knob closer to "MAX"
when the outside temperature becomes warm.

A

B

C

D

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Summary of Contents for RM2552

Page 1: ...Street Cambridge Ontario LaGrange IN 46761 N3H 2N7 Canada Phone 219 463 4858 Phone 519 653 4390 822 70 11 00 RM 2552 RM 2553 FOR YOUR SAFETY If you smell gas 1 Open windows 2 Don t touch electrical sw...

Page 2: ......

Page 3: ...el Selector Switch B Thermostat Knob Gas Electric C Flame Failure Safety Valve Push button D Flame Indicator FIG 1 Cover Reigniter Flexible cord 12 Volt Terminal block Reigniter 12 volt Terminal block...

Page 4: ...shall be made in such a manner as to separate the combustion system from the living space of the mobile home or recreational vehicle Openings for air supply or for venting of combustion products shal...

Page 5: ...refrigerator NOTE Clearance N is the distance between the bot tom of the lower vent to the roof material For ventilation height see table VENTILATION HEIGHTS See Figures 3 and 4 Overall Recess Refrig...

Page 6: ...g order First Two screws installed through the front base which includes the lower front strip installation The refrigerator is provided with a lower front strip ship ped as a loose part The front str...

Page 7: ...excess of 1 2 psig the refrigerator and its individual shutoff valve must be disconnected from the gas supply piping system When testing the gas supply system at pressures less than or equal to 1 2 ps...

Page 8: ...12 volts DC heater and are located on the back of the refrigerator cabinet See FIG 1 The refrigerator must be connected to the battery circuit with two wires of adequate capacity to avoid voltage dro...

Page 9: ...g procedure several times to purge the air out of the gas lines As soon as the necessary cold temperature inside the cabinet has been reached adjust the thermostat knob to required setting WARNING Mos...

Page 10: ...stat back to the normal setting when the ice is formed Food in the lower compartment may be frozen if the thermostat is left on MAX Refrigerator volume The combined volume of the freezer and fresh fo...

Page 11: ...ections for gas leaks Refer to section INSTALLATION page 4 to 8 3 PERIODIC MAINTENANCE To keep your Dometic refrigerator operating efficiently and safely periodic inspection and cleaning of several co...

Page 12: ...age to the refrigerator or create a fire hazard 10 Reinstall burner being careful that the end of the burner fits into the slot on the burner bracket Check to make sure slots are centered under the fl...

Page 13: ...n the frontpage INSTRUCTIONS FOR MOUNTING THE DOOR PANEL The refrigerator is normally delivered without door pan els Before starting the mounting work check that the panel dimensions are in compliance...

Page 14: ...KITS Refr Kit Model No Components Drawing RM 2552 3A Roof Vent 3103633 Base RM 2553 3103634 Cap Both Required Lower Side Vent 3102364 3102277 3102970 3102972 3101534 3101782 3101337 For further inform...

Page 15: ......

Page 16: ...MO FO 9542...

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