Dometic RM2820, RM2620 INSTALLATION AND OPERATING INSTRUCTIONS

INST ALLATION AND

®

®

OPERATING INSTRUCTIONS

REFRIGERATOR FOR LP-GAS AND ELECTRIC OPERATION

RM2620 RM2820

Contents:
Installation 4

Operating Instructions 7
Maintenance & Service 1 1

Page

FOR YOUR SAFETY

If you smell gas:

1. Open windows.

2. Don’t touch electrical switches.

3. Extinguish any open flame.

4. Immediately call your gas supplier .

FOR YOUR SAFETY

Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.

W ARNING: Improper installation,
adjustment, alteration, service or
maintenance can cause injury or
property damage. Refer to this
manual. For assistance or additional
information consult a qualified
installer, service agency or the gas
supplier.

Pour votre sécurité
Si vous sentez une odeur de gaz:

1. Ouvrez les fenêtres.

2. Ne touchez à aucun interrupteur.

3. Éteignez toute flamme nue.

4. Avertissez immédiatement votre fournis­seur de gaz.

Pour votre sécurité
Ne pas entreposer ni utiliser de l’essence ni

d’autres vapeurs ou liquides inflammables à
proximité de cet appareil ou de tout autre
appareil.

Avertissement: Une installation, un réglage,
une modification, une réparation ou un
entretien non conforme aux normes peut
entraîner des blessures ou des dommages
matériels. Lisez attentivement le mode d’em­ploi fourni avec l’appareil. Pour obtenir de
l’aide ou des renseignements supplémentai­res, consultez un installateur ou un service
d’entretien qualifié ou le fournisseur de gaz.

USA Corporate Office CANADA

Service Office 2320 Industrial Parkway Elkhart, IN 46515 Dometic Distribution Inc.
Dometic Corporation 866 Langs Drive
2320 Industrial Parkway Cambridge, Ontario
Elkhart, IN 46515 For Service Center Assistance N3H 2N7 Canada
Phone: [phone] Call: 800-544-4881 Phone: [phone]

825120305 MO-FO 0434 (French 3309618.001)

Reigniter

Power module
cover

Heater

Thermofuse
Flue baffle

Protection
cover

Drain water hose

12V!DC

FIG. 1

Flexible cord

Inlet fitting

12 volt
terminal block

Refrigerator control panel

ON

AUTO

12

OFF

BC

AC

GAS

DA

CHECK

Burner jet

Manual gas shutoff valve

COLD

1

2

4

COLDEST

5

3

3

E

FIG. 2

F

LEGEND 2-WAY AMES Model

1. Main Power Button ON/OFF

2. AUT O/GAS Mode Selector Button

3. Temperature Selector Button
A. AUT O Mode Indicator Lamp

B. AC Mode Indicator Lamp
C. GAS Mode Indicator Lamp
D. CHECK Indicator Lamp

(GAS Mode Only)

E. Temperature Indicator Lamps

F. Climate Control Switch

3

INSTALLATION

GENERAL INSTRUCTION

This appliance is designed for storage of foods and
storage of frozen foods and making ice.

This appliance is certified under the latest edition of
ANSI Z21.19•CSA 1.4 Refrigerators using gas fuel.

The installation must conform with local codes, or in
absence of local codes, the following standards as ap­plicable.

In the U.S. the installation must conform with:

1. National Fuel Gas Code, ANSI Z223.1/NFPA 54
(latest edition).

2. Recreational Vehicles Code, ANSI A119.2 (latest
edition)

3. Manufactured Home Construction and Safety
St andard, T itle 24 CFR, Part 3280.

If an external electrical source is utilized, the refrigera­tor, when inst alled, must be electrically grounded in ac­cordance with local codes or, in the absence of local
codes, the National Electrical Code, ANSI/NFP A 70 - (lat­est edition).

In CANADA, the installation must conform with:

1. Natural Gas and Propane Installation Code,
CSA B149.1

2. CSA Z240 R V Series, Recreational Vehicles.

3. Current CSA Z240.4, Gas-equipped Recreational
Vehicles and Mobile Housing.

If an external electrical source is utilized, the refrigera­tor, when inst alled, must be electrically grounded in ac­cordance with local codes or, in the absence of local
codes, the Canadian Electrical Code, CSA C22.1, Part s
I and II - (latest edition).

VENTILATION

The installation 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 shall
have a minimum dimension of not less than 1/4 inch.

The lower side vent is fitted with a panel, which provides
an adequate access opening for ready serviceability of
the burner and control manifold of the refrigerator. This
should be centered on the back of the refrigerator.

GAS CONNECTION

Hook up to the gas supply line is accomplished at the
manual gas valve, which is furnished with a 3/8" SAE
(UNF 5/8" -18) male flare connection. All completed con­nections should be checked for leaks with soapy water.

! WARNING

DO NOT use a flame to check for gas leaks.

The gas supply system must incorporate a pressure regu­lator to maintain a supply pressure of not more than 11
inches water column.
When testing the gas supply system at test pressures in
excess of 1/2 psi, 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 psi, the appliance must be isolated
from the gas supply piping system by closing its indi­vidual manual shutoff valve.
In case detailed instructions on the installation and con­nection to the gas supply are required, contact your
dealer or distributor.

ELECTRICAL CONNECTION
120 V olts AC Connection

The refrigerator is equipped with a three-prong (ground­ing) plug for your protection against shock hazards and
should be plugged directly into a properly grounded
three-prong receptacle. DO NOT cut or remove the
grounding prong from this plug. The free length of the
cord is 2 feet and therefore recommended that the re­ceptacle be located to the left side (opposite side of re­frigerator burner assembly) of the refrigerator (viewed
from the rear). The receptacle should be 3” (from the
bottom of the plastic receptacle) above the refrigerator
mounting floor. (see FIG. 3). This allows easy access
through the vent door. The cord should be routed to avoid
direct contact with the burner cover, flue cover or any
other components that could damage the cord insula­tion.

Proper installation requires one lower fresh air intake
and one upper exhaust vent. The ventilation kits shown
in this instruction manual have been certified for use
with the refrigerator models listed in the Table.
For “Certified Vent System Kit s” see page 15.

The ventilation kits must be installed and used without
modification. An opening toward the outside at floor level
in the refrigerator compartment must be provided for
ventilation of heavier-than-air fuel gases. The lower vent
of the recommended kits is provided with proper size
openings. The flow of combustion and ventilating air must
not be obstructed.

4

120 Volt AC
receptacle

3”

Hole for drain water hose

FIG. 3

12 Volts DC Connection

This refrigerator model is not designed for 12 volt DC
operation of the cooling system; however, a continuous
12 volt DC must be supplied to the refrigerator to oper­ate the controls. Use a minimum of a 14 gauge wire
between the battery and refrigerator to supply the con­trol voltage.
The connection is made to the positive (+) and negative (-)
terminals located at the rear of the refrigerator. (See
FIG. 1). Correct polarity must be observed when con­necting to the DC supply .
DO NOT use the chassis or vehicle frame as one of the
conductors. Connect two wires at the refrigerator and
route to the DC supply .

INSTALLING REFRIGERATOR IN
ENCLOSURE

NOTE: DO NOT install the appliance directly on

carpeting. Carpeting must be removed or
protected by a metal or wood panel beneath
the appliance, which extends at least full
width and depth of the appliance.

The refrigerator must be installed in a substantial enclo­sure and must be level. When installing the refrigerator
in the enclosure, all areas within the recess in which the
refrigerator is installed must be sealed.
Make sure that there is a complete seal between the
front frame of the refrigerator and the top, sides and
bottom of the enclosure. A length of sealing strip is ap­plied to the rear surface of the front frame for this pur­pose, see FIG. 4.
The sealing should provide a complete isolation of the
appliance’s combustion system from the vehicle interior .
NOTE: Be careful not to damage the sealing strip when
the refrigerator is put in place.

Securing the Refrigerator

After the refrigerator is put in place, (ensuring a com­bustion seal at the front frame), the refrigerator is to be
secured in the enclosure with six screws (not included).
The screws have to be installed in the following order:

FIG. 4

FIG. 5

3 rd.

2 nd.

1 st.

STEP 1: T wo screws installed on the front base.
STEP 2: Two screws installed in the top frame.
STEP 3: Two screws installed in the rear base.
STEP 4: The refrigerator is provided with a lower front

strip (shipped as a loose part). The front strip is to be
attached after the refrigerator is set into the cutout opening,
and secured with 3 screws, (not included). (See FIG . 5).

Failure to follow the sequence in securing the refrigerator
in the enclosure can cause leakage between the frame
and cabinet. Plastic caps are provided to cover the screw
holes in the top decoration.
Any space between the counter, storage area or ceiling
and top of the refrigerator greater than 1-1/2 inches
should be blocked. The heat produced at the rear of the
refrigerator will become trapped in this space, making
the top of the refrigerator hot and reduce the efficiency
of the refrigerator.

4 th.

Drain water hose

A hole must be drilled through flooring see FIG. 3.
The installer MUST make sure that the hose does not
kink when run through the floor. Seal around the hose
that goes through the drilled hole. If a longer hose than
supplied is required to get the water to drain outside of
the vehicle, the installer will have to supply the extra
length of hose.

TESTING LP GAS SAFETY SHUTOFF

The gas safety shutoff must be tested after the re­frigerator is connected to the LP gas supply .

To test the gas safety shutoff, proceed as follows:

1. Start the refrigerator and switch to GAS mode.
(See start up instructions).

5

2. Check that the gas flame is lit and the GAS mode
indicator lamp (C) is on.

3. Close the manual gas shutoff valve at the back of
the refrigerator. (See FIG. 1).

4. Wait for one minute. The CHECK indicator lamp (D)
should be on and the GAS mode indicator lamp (C)
should be off.

5. Remove protection cover (see FIG. 1) and open the
manual gas shutoff valve. Do not change any
button positions on the control panel. Apply a non­corrosive commercial bubble solution to the burner
jet orifice.

6. No bubbles should appear at the opening of the
burner jet orifice. The presence of bubbles indicates
a defective gas safety shutoff, and service is
required.

7. If no bubbles were present at the burner jet orifice,
it should be rinsed with fresh water. Be careful not
to damage the burner jet orifice. Replace cover and
press the main power ON/OFF button (1) OFF and
back ON. Normal operation of the burner should
return. Allow the burner to operate for a minimum
of 5 minutes.

NOTE: The upper vent should be
centered over the condenser coil
at the back of the refrigerator.

Minimum
ventilation
height

Condenser

CERTIFIED INST ALLA TION

Certified installations require one roof vent and one lower
side vent.
For “Certified Vent System Kits” see page 15.
For further information contact your dealer or

distributor.

METHODS OF INSTALLATION

The method of installation is shown in FIG. 6.
It is essential that all maximum or minimum dimensions
are strictly maintained, as the performance of the refrig­erator is dependent on adequate flow of air over the rear
of the refrigerator.

VENTILA TION HEIGHTS

Installation with roof Minimum ventilation
vent and lower side vent heights in:

Refrigerator Inches mm
RM2620 54 1372

RM2820 60 1524

CLEARANCES

Minimum clearances in inches to combustible materials
are:
G: Top 0
K: Side 0
L: Bottom 0
M: Rear 0
N: See NOTE: Clearance “N” below.

FIG. 6

FIG. 7

N

G

KK

L

M

NOTE: Clearance “M” is between the rearmost part of

the refrigerator and the wall behind the refrigerator.
NOTE: Clearance “N” is the distance between the bot-

tom of the lower side vent to the roof material. For ven­tilation height, see table VENTILATION HEIGHTS.
See Figures 6 and 7.

6

D

Side view View from above

C

D

HAW

FIG. 8

Refrigerator Dimensions Dimensions
Model

Height Width Depth Height Width Depth

inch 51-31/32 22-23/32 24-9/16 49-17/32 21-13/16 24-3/32

RM2620

mm 1320 577 624 1258 554 612
inch 57-7/8 24-39/64 24-9/16 55-7/16 23-11/16 24-3/32

RM2820

mm 1470 625 624 1408 601 612

This method of installation and these clearances will give you adequate space for service and proper installation.

OPERATING
INSTRUCTIONS

IMPORT ANCE OF LEVELING A
REFRIGERATOR

In an absorption refrigerator system, ammonia is lique­fied 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.
When starting this refrigerator for the very first time, the
cooling cycle may require up to four hours of running
time before the cooling unit is fully operational.
The tubing in the evaporator section is specifically sloped
to provide a continuous movement of liquid ammonia,
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).

Overall Recess

ABCHWD

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.

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.
This refrigerator is equipped with a semi Automatic
Energy Selector (AMES) control system, which can be
set to automatically select either 120 volt AC or LP gas
operation (AUTO mode), or if desired LP gas only (GAS
mode).
The refrigerator controls will work down to 9.6 volt DC.

! W ARNING

Most LP gas appliances used in recreational ve­hicles 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 EXPLOSION.

FOR YOUR SAFETY, when refueling, shut off all
LP gas appliances which are vented to the out­side.

B

7

Refrigerator control panel

AD

ON

12 3

OFF

AUTO

GAS

AC

BC E

START UP INSTRUCTIONS

A. A continuous 12 volt DC supply must be available for

the electronic control to function.

B. Press the main power ON/OFF button (1) to the

DOWN position.

C. Press the TEMPERATURE SELECTOR button (3)

until the lamp at the desired setting is illuminated.

AUTO MODE

1. Press the AUT O/GAS mode selector button (2) to
turn ON the Auto lamp (A). If 120 volts AC is
available, the AC mode indicator lamp (B) will
illuminate indicating AC operation. If 120 volt s AC is
not available, the GAS mode indicator lamp (C) will
illuminate and the control system will automatically
switch to GAS operation.

2. If the CHECK indicator lamp (D) illuminates and the
GAS mode indicator lamp (C) is off, the controls
have failed to ignite the burner in the GAS mode.
GAS operation may be reset by pressing the main
power ON/OFF button (1) to the OFF then ON
position. (See step 2 under GAS MODE).

3. Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired position is illuminated.

CHECK

COLD

3

1

2

COLDEST

4

5

THERMOSTAT

The thermostat on the refrigerator controls both the gas
and electric operation, thereby eliminating the neces­sity of resetting each time a different energy source is
employed.
After the initial start-up, the thermostat should be moved
from “COLDEST” to the desired temperature setting,
usually about mid setting.

TO SHUT OFF THE REFRIGERATOR

The refrigerator may be shut off while in any mode of
operation by pressing the main power ON/OFF button
to the UP (OFF) position. This shuts off all DC power to
the refrigerator, including the interior light.

GAS MODE

1. Press the AUT O/GAS mode selector button (2) to
turn OFF the Auto lamp (A). The GAS mode
indicator lamp (C) will illuminate. Within 45 seconds
the burner should be ignited and operating nor­mally.

2. On the initial refrigerator start-up it may take longer
than 45 seconds to allow air to be purged from the
gas line. If the gas does not ignite within 45 sec­onds the CHECK indicator lamp (D) will illuminate
and the GAS mode indicator lamp (C) will go off. To
reset when the CHECK indicator lamp (D) is
illuminated, press the main power ON/OFF button
(1) to the OFF and then ON position.

NOTE: Do not continue to reset GAS operation if
the CHECK indicator lamp continues to be illumi­nated after several tries.

3. Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired position is illuminated.

8

Refrigerator control panel

AD

ON

12 3

OFF

AUTO

GAS

AC

BC E

DESCRIPTION OF OPERATING
MODES

AUTO MODE

When operating in the AUTO mode, the AUTO mode
indicator lamp (A) will illuminate.
The control system will automatically select between AC
and GAS operation with AC having priority over GAS.
Either the AC indicator lamp (B) or the GAS indicator
lamp (C) will illuminate depending on the energy source
selected by the control system. If the control system is
operating with AC energy and it then becomes unavailable,
the system will automatically switch to GAS. As soon as
AC becomes available again the control will switch back
to AC regardless of the st atus of GAS operation.

GAS MODE

When operating in the GAS mode, the AUTO mode
indicator lamp (A) will be off and the GAS mode indica­tor lamp (C) will be illuminated. This mode provides LP
gas operation only. The control system will activate the
ignition system and will make three attempt to light the
burner for a period of approximately 45 seconds with
two minutes interval. If unsuccessful, the CHECK indi­cator lamp (D) will illuminate and the GAS mode indica­tor lamp (C) will turn off.

CHECK

COLD

3

1

2

COLDEST

4

5

LIMP MODE OF OPERA TION

This control system contains a feature where it will con­tinue to operate the cooling system in the event of a
failure of a major operating component. Two different
modes of operation can occur in this category .

If for some reason the display module becomes non func­tional, the control system will revert to full automatic
operation selecting the best energy source available with
AC, GAS priority . The temperature of the refrigerator will
be maintained at the MID position within normal tem­perature tolerances. The power module will continually
attempt to reestablish operation of the display module.

The second limp mode of operation will execute when a
failure of the temperature sensing device or associated
electronic circuitry occurs.
If this should occur, the control system will operate on
the energy source selected via the control panel. The
cooling unit will run continuously on the selected energy
source.
The refrigerator will continue to operate in this mode in­definitely or until a new sensor is installed and the sys­tem is reset.

To restart GAS operation, press the main power ON/OFF
button (1) to the OFF and then ON position. The control
system will attempt a new ignition sequence.

If the refrigerator has not been used for a long time or
the LP tanks have just been refilled, air may be trapped
in the supply lines. To purge the air from the lines may
require resetting the main power ON/OFF button (1) three
or four times. If repeated attempts fail to start the LP gas
operation, check to make sure that the LP gas supply
tanks are not empty and all manual shutoff valves in the
lines are open. If the problem is still not corrected, con­tact a service center for assistance.
If the control is switched to AC operation while the CHECK
indicator lamp is on, it will function properly, but the
CHECK indicator lamp will not go off until the main power
ON/OFF button is pressed to the OFF then ON position.

9

HOW TO USE THE REFRIGERATOR

FOOD STORAGE COMP ARTMENT

The food storage compartment is completely closed and
unventilated, which is necessary to maintain the required
low temperature for food storage. Consequently, foods
having a strong odor or those that absorb odors easily
should be covered. Vegetables, salads etc. should be
covered to retain their crispness. The coldest positions
in the refrigerator are under the cooling fins and at the
bottom of the refrigerator. The warmer areas are on the
upper door shelves. This should be considered when
placing different types of food in the refrigerator.

FROZEN FOOD STORAGE
COMPARTMENT

Quick frozen soft fruits and ice cream should be placed
in the coldest part of the compartment, which is on or
just below the freezer shelf. Frozen vegetables, may be
stored in any part of the compartment.
This compartment is not designed for deep or quick freez­ing of food. Meat or fish, whether raw or prepared, can
be stored in the frozen food storage compartment pro­vided they are precooled first in the refrigerator. They
can be stored about three times longer in the frozen food
compartment as compared to the fresh food compart­ment. To prevent food from drying out, keep it in covered
dishes, containers, plastic bags or wrapped in aluminum
foil.
Ice cubes can be made in the freezer compartment.
For faster ice making, the trays should be placed in direct
contact with the freezer shelf.
Ice will be made more rapidly if the thermostat is set at
its highest position.
It is a good idea to do this a few hours before the antici­pated need for ice, but be sure to move back to normal
setting, usually about mid setting when the ice is formed.
Food in the lower compartment may be frozen if the set­ting is left on “COLDEST” position.
Refrigerator volume.
T otal refrigerated volume is 6 cu.ft. for the model RM2620.
T otal refrigerated volume is 7.7 cu.ft. for the model RM2820.

DEFROSTING

Shut off the refrigerator by pressing the main power
ON/OFF button to the UP (OFF) position. Empty the
refrigerator, leaving the drip tray under the finned evapo­rator, and the cabinet and freezer doors open.
Defrosting time can be reduced by filling the ice trays
with hot water and placing them in the freezer compart­ment.

When all the frost has melted, dry the interior of the re­frigerator with a clean cloth. Replace all food and set the
thermostat to the COLDEST temperature setting for a
few hours. Then reset the thermostat to the desired set­ting, usually at mid setting.

CLEANING

Cleaning the refrigerator is usually done after it is defrosted
or put into storage. To clean the interior liner of the re­frigerator, use lukewarm weak soda solution. Use only
warm water to clean the finned evaporator, gasket, ice
tray and shelves.
NEVER use strong chemicals or abrasives to clean these
parts, as the protective surfaces will be damaged. It is
important to always keep the refrigerator clean.

SHUT-OFF (ST ORAGE PROCEDURE)

Shut off the refrigerator by pressing the main power
ON/OFF button to the UP (OFF) position.
If the refrigerator will not be in operation for a period of
weeks, it should be emptied, defrosted, cleaned and the
doors left ajar. The ice trays should also be dried and
kept outside the cabinet.

! W ARNING

DO NOT store explosive substances in the refrigera­tor, such as cigarette lighter gas, gasoline, ether or
the like.
NOTE: Sodium chromate is used for corrosion protec-

tion (less than 2 weight % of the coolant).

CLIMA TE CONTROL

During the summer months of high temperatures and
humidity , the metal frame between the freezer and fresh
food compartments may have water droplets forming.
The number of water droplets will increase if the vehicle
isn’t air conditioned during these months.
This refrigerator comes standard with a 12 volt (DC)
climate control that will evaporate the water droplets
when they form.
To have the climate control on, you position the switch
(“F” see figure 2) located beneath the top decoration
panel that houses the control panel to ON.
The climate control can be left on continuously or only
used when temperatures require it.

NOTE: The climate control will draw 12 volt DC power
continuously when in the ON position. It should be turned
OFF when a charging source is not available.

! CAUTION

DO NOT use a hot air blower. Permanent damage
could result from warping the metal or plastic part s.
DO NOT use a knife or an ice pick, or other sharp
tools to remove frost from the freezer compartment.
They can create a leak in the ammonia system.

10

GAS EQUIPMENT ASSEMBLY

SOLENOID VALVE

BURNER MOUNTING SCREWS

INLET FITTING

MANUAL SHUTOFF VA LVE
Shown in open position

FIG. 9

PRESSURE TEST PORT

ELECTRIC EQUIPMENT

CARTRIDGE HEA TER

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.
These models are equipped with one electric heater for
120 volt AC.
To replace the heater proceed as follows:

1. Disconnect the wall plug, and the 12 volt wires.

2. Remove the protection cover see FIG. 1.

3. Remove the power module cover see FIG. 1.

4. Disconnect the heater leads.

5. With a pair of pliers unfold the lug holding the lid
of the boiler casing and open the lid.

6. Remove some insulation wool so that the heater
is accessible.

7. T urn and lift the heater out of it s pocket.

8. Fit the new heater into the pocket.

9. Connect the leads and put on the power module
cover.

10. Reset the insulation and close the lid of the boiler.
1 1. Replace the protection cover.

FUSES

These models are equipped with 2 fuses, one for the
refrigerator control system, and one for the AC cartridge
heater. (See t able below).
To replace fuse(s) proceed as follows.

1. Disconnect the wall plug, and the 12 volt wires.

2. Remove the power module cover. See FIG. 1.

3. Snap the fuse out of the fuse holder.

4. Fit a new fuse in to the fuse holder.

5. Replace the power module cover.

Control system 3 Amp
AC heater 5 Amp

THERMOCOUPLE

BURNER JET

SPARK ELECTRODE

BURNER TUBE

MAINTENANCE & SERVICE

The user should be aware of service that must be
done on a regular schedule to keep the refrigerator
operating properly . The service should only be per­formed by a qualified technician who is familiar with
LP gas systems and refrigerators.

1. REFRIGERA TOR REMOVAL

Before working on the refrigerator, make sure the AC
voltage and DC voltage leads are disconnected. Shut
off the gas supply at the LP tank. Disconnect the gas
supply line at the rear of the refrigerator, see FIG. 1.
Always use a back up wrench when loosening and tight­ening connections.
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 con­nections for gas leaks.
Refer to section INSTALLATION, page 4 to 7.

2. 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 obstruc­tions 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: 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.

11

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 appearance of bubbles indicates a leak and
should be repaired immediately by a QUALIFIED
SERVICEMAN WHO IS FAMILIAR WITH GAS SYS­TEM AND REFRIGERATORS.

! WARNING

DO NOT use a flame to check for gas leaks.

C. Check the AMES control system by connecting/dis-

connecting 120 volt AC power , start/stop the engine,
etc. Compare the operation with the operation de­scribed in section Operating Instructions.

D. The LP gas pressure should be checked and the main

regulator readjusted if pressure is incorrect. The cor­rect operating pressure is 1 1 inches of water column.
The correct place to take the LP gas pressure is at
the test port just ahead of the burner jet. (See FIG. 9).

E. Inspect the flue baffle. It should be reasonably clean

and free of soot. Heavy soot formation indicates im­proper functioning of the burner. The flue and burner
both require cleaning in the following manner:

1. Unplug the refrigerator power cord from the 120 volt
AC outlet. (See FIG. 3).

2. Disconnect or shut off the 12 volt DC power to the
refrigerator.

3. Turn manual shutoff valve to OFF. (See FIG. 1 & 9).

4. Remove cover from the burner housing. (See FIG . 1).

5. Disconnect the wire from the high voltage electrode.

6. Remove the burner mounting screws and remove the
burner assembly . (See FIG. 9).

7. Remove the flue cap from top of flue tube and lift out
the wire and spiral baffle. Clean the flue from the top
using a flue brush. Blowing compressed air into the
flue will not properly clean soot and scale out of the
flue tube. Replace spiral baffle and flue cap.

8. Clean burner tube with a brush. Blow out burner with
compressed air.

9. Before removing burner jet, 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 burner jet.

NOTE: The color of the flame shall be clear blue over
the slots of the burner . (See FIG. 10).

Clear blue color
of flame

FIG. 10

! WARNING

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.

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 flue tube
and the thermocouple is positioned properly (tip of
thermocouple extends over two slots of burner).

11. Be sure to reconnect the wire to high voltage elec­trode. Check the electrode for proper location and
gap. (See FIG. 11).

FIG. 11

12. Turn on manual gas shutoff valve and check all fit­tings for leaks with soapy water.

13. Connect 120 volt power cord to the outlet and re­connect or turn on the 12 volt DC power.

14. Check LP gas safety shutoff. See page 5.

Electrode

1/8” to 3/16”
(3-5 mm)

Burner tube

TROUBLESHOOTING
The Refrigerator Does Not Cool Properly

A. Burner jet clogged.

Clean. (See Section Maintenance & Service, item 2.

Periodic maintenance, Paragraph E item 1-14.
B. Check level of refrigerator.
C. Venting problem.

Restriction in air flow across cooling unit.
D. Heavy frost buildup on evaporator fins.

Defrost.
E. Flue baffle not inserted properly in flue tube.
F . Improperly set thermostat.

See section Operating Instructions, part Start Up

Instructions.
G. Burner dirty.

Clean. (See section Maintenance & Service, item 2.

Periodic Maintenance, Paragraph E item 1-14).

12

H. LP gas pressure low at burner.

Set main regulator so pressure does not drop
below 1 1 inches of water column at pressure test
port. (See FIG. 9).

I. Burner not located properly under flue tube.

Relocate.

J. Burner damaged.

Replace.

K. Odor from fumes.

1. Dislocated burner

2. Damaged burner

3. Dirty flue tube

L. FUSES

1. Refrigerator AC Supply

3. Refrigerator control system
See page 1 1, p art FUSES.

If the refrigerator fails to work, check the following
points before calling a service technician:

• that the fuses are intact

• that the power cord is plugged in

• that 12 volt DC is connected to the refrigerator

The refrigerator is equipped with an overheating protec­tion.
An authorized service technician can check if it has been
triggered or not.

NOTE: AVOID SPRAYING WATER THROUGH THE
REFRIGERA TOR VENTS WHILE W ASHING YOUR RV .

All the above instructions are to be followed closely . The
refrigerator is quality-guaranteed. However, we are not
responsible for any failures caused by improper adjust­ments and unfavorable installation conditions. Contact
service point or distributor service dept. for assistance.

FIG. 12

CHANGING DOOR HINGES FROM ONE
SIDE TO THE OTHER

Open the top door and remove the two screws holding
the top decoration. The screws are accessible from be­neath. (See FIG. 12).
Remove the top hinge pin and lift out the top door.
Remove center hinge pin and lift out the lower door.
Unscrew the bottom hinge pin. Remove the plastic cap
from the opposite lower hinge and place it in the hole
just “left empty” by the lower hinge pin.
Screw the lower hinge pin in the hole from which the
plastic cap was removed.
Before replacing the doors on the refrigerator, remove
the catches and move them to the opposite side of the
cabinet. The holes are covered with plastic caps that
must be removed and inserted in the holes that previ­ously held the catches.

Unscrew the handles and move them to the opposite
side of the door.
Insert the plastic caps (from the parts bag) into the holes
left open on the doors.
Remount the doors and hinge pins in the reverse order
of their removal.
Before the top decoration is refitted, check that the door
closes easily and the gasket seals well on all sides.

NOTE: Plastic caps for empty holes are in the parts bag
inside the refrigerator.

13

INSTRUCTIONS FOR MOUNTING
THE DOOR P ANEL

The refrigerator is normally delivered without door panels.
Before starting the mounting work, check that the panel
dimensions are in compliance with those given in the
table and the instructions are read thoroughly .
When mounting the panel, proceed as follows:

A. Open the door 90 degrees.

On new refrigerators, the decoration strips are
taped inside the door; if installed on the door ,
remove the door decoration strip (2) by removing
its two screws (1).

B. Insert one vertical edges into the groove of the door

frame (3).

C. Bend the panel gently so that the free side of the

panel can be slipped into the corresponding groove
of the door frame (4). Slide the panel down into the
groove of the bottom frame (5).

D. Between the upper edge of the panel and the door

frame there is a gap which should be covered by
the decoration strip.

E. Put the decoration strip across the door so that the

gap is covered and push it upward (6). The tabs on
the inside of the strip should fit behind the flange of
the door frame. Secure the decoration strip with the
two screws removed in Step A (1).

2

1

1

4

PANEL DIMENSIONS

MAX. THICKNESS 5/32" (4 mm)

REFR. MODELS HEIGHT WIDTH
TYPE MAX. MIN. MAX. MIN.

RM2620

upper mm 306 304 515 513

inch 12-3/64 11-31/32 20-9/32 20-13/64

lower mm 819 817 515 513

inch 32-1/4 32-5/32 20-9/32 20-13/64

RM2820

upper mm 378 376 563 561

inch 14-7/8 14-51/64 22-11/64 22-3/32

lower mm 897 895 563 561

inch 35-5/16 35-15/64 22-11/64 22-3/32

3

5

6

1

1

14

CERTIFIED VENT SYSTEM KITS

REFRIGERATOR KIT
MODEL NO. COMPONENTS PART NO.

RM2620 4A Roof Base 3103633.XXX*
RM2820 Roof Cover 3103634.XXX*

* Fill in “XXX” with color code numbers. For color codes, contact your supplier.

For further information contact your dealer or distributor.

SP ARE P ARTS

The following list is a list of commonly used parts, which
should be available, if required, from your Dometic Ser­vice Center.

Lower Side Vent 3109350.XXX*

A = RM2620
B = RM2820

Part No. Description

200 74 19-20/9 A - Jet, No. 56
200 74 19-21/7 - B Jet, No. 58
293 06 97-09/5 A B Burner, with conductor
293 27 81-01/2 A B Electrode
200 75 90-05/8 A - Baffle
200 75 90-06/6 - B Baffle
293 1 1 32-02/7 A B Spark ignition device
17 37 68-07/8 A - Heater, 295W, 120V
17 37 68-03/7 - B Heater, 325W, 120V
293 18 26-01/6 A B Thermocouple
293 14 18-03/8 A B Door shelf, (freezer)
200 05 71-25/3 A - Door shelf, 4 pieces
200 17 32-18/5 - B Door shelf, 4 pieces
200 27 26-06/1 A - Box vegetable­200 27 26-16/0 - B Box vegetable­293 21 06-01/2 A B Lamp cover
293 16 00-02/3 A B Handle

Contact an authorized service center for
parts and repairs as needed.

15

RM2620, RM2820

16

MO-FO 0434