Dometic NDR1272 User manual

REFRIGERATOR FOR LP-GAS AND ELECTRIC OPERATION.
NDR1272
Automatic Energy Selector
NEW DIMENSIONS
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.
Contents: Page
installation
4
Operating instructions
8
Maintenance & Service 12
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
1
WARNING: 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.
AVIS
Cet appareil doit
&re repare
seulement par un reparateur
autorise. Modification de
I’appareil pourrait
Qtre
extremement dangeruse, et
pourrait causer mal ou
mort.
81 Dometk
Our goal. . .
your satisfaction.
Corporate Office
2320 Industrial Parkway Elkhart, IN 46515
USA For Service Center Assistance CANADA
Service Office Call: 800-544-4881
Dometic Distribution Inc.
The Dometic Corporation 866 Langs Drive
509 South Poplar Street
Cambridge,Ontario
LaGrange, IN 46761 N3H
2N7 Canada
Phone: [phone] Phone: [phone]
822707600

Heaters
Protection
cover
Flue baffle
-
B
7
I
L
-
%Ej / \ ) Flexible>Drain water hoee
Cover, Reigniter
12 Volt Terminal
block \ Power module cover
FIG. 1
2 - WAY display panel.
LEGEND
2-WAY AES Model
1. Main Power Button ON/OFF
2. AES/AUTO/GAS Mode Selector Button
3. Temperature Selector Button
A. AC Mode Indicator Lamp
B. AES/AUTO Mode Indicator Lamp
C. GAS Mode Indicator Lamp
D. CHECK Indicator Lamp
E. Temperature Indicator Lamps
F. Climate Control Switch
FIG. 2

INSTALLATION
GENERAL INSTRUCTION
This appliance is designed for storage of foods
and storage of frozen foods and making ice.
The refrigerators outlined herein have been design cer-
tified by A.G.A. under the ANSI 221.19 Refrigerator
Standard for installation in a mobile home or recreational
vehicle and are approved by the Canadian Gas Asso-
ciation.
The certifications are, however contingent on the instal-
lation being made in accordance with the following in-
structions as applicable.
In the U.S.A., the installation must conform with:
1.
National Fuel Gas Code ANSI 2223.1 -(latest edition)
2. Manufactured Home Construction and Safety Stan-
dard, Title 24 CFR, Part 3280.
3. Recreational Vehicles ANSI Al 19.2-(latest edition).
The unit must be electrically grounded in accordance
with the National Electric Code ANSI/NFPA 70-(latest
edition) when installed, if an external alternating current
electrical source is utilized.
4. Any applicable local code.
In CANADA, the installation must conform with:
1.
Current CAN/CGA B149 Gas Installation Codes
2. Current CSA Standard 2240.4 GAS-EQUIPPED
RECREATIONAL VEHICLES AND MOBILE HOUS-
ING.
3. Where a flexible metal connector is used, it must
comply with the provisions of the current Standard
CAN1-6.10, METAL CONNECTORS FOR GAS
APPLIANCES.
4. Any applicable local code
The unit must be electrically grounded in accordance
with the current CANADIAN ELECTRICAL CODE C22
Parts 1 and 2.
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.
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 Kits” see page 15. The ventilation kits
must be installed and used without modification. An
opening toward the outside at floor level in the refrigera-
tor compartment must be provided for ventilation of
heavier-than-air fuel gases. The lower vent of the recom-
mended kits is provided with proper size openings. The
flow of combustion and ventilating air must not be ob-
structed.
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.
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.
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 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 psig, the appliance must be isolated
from the gas supply piping system by closing its individu-
al 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 Volts AC Connection
The refrigerator is equipped with a three-prong (ground-
ing) 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 right side of the refrigerator
(viewed from the rear) and approximately 10 inches from
the 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.
I-
T
-_. 1
12 Volts DC Connection
The refrigerator model NDR 1272 require a continuous
12 volt DC supply (even though 2-way models are

DC control is required to maintain the automatic energy
system). The connection is made to the positive (+) and
negative (-) terminals of the terminal block on the back
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.
The distance the current must travel from the battery to
the refrigerator dictates the AWG wire size to be used.
Should the wire be too small for the distance, a voltage
drop will result.
Recommended wire sizes are shown below.
Maximum total conductor wire length in feet and meters.
NDR 1272
2-way
17 ft.
5m
27 ft.
8m
min. wire
size
14 AWG
12 AWG
The wires from the battery to the refrigerator must be of
large enough size to handle the load. The connections
must be clean, tight and free from corrosion.
INSTALLING REFRIGERATOR IN
ENCLOSURE
The transport support at the rear of the refrigerator can
be removed if necessary for the installation of the refrig-
erator in the enclosure. (See figure above).
NOTE: DO NOT install the appliance directly on
carpeting. Carpeting must be removed or
protected by a metal or wood panel be-
neath the appliance which extends at least
full width and depth of the appliance.
The refrigerator must be installed in a substantial enclo-
sure 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.
FIG. 4
Securing the Refrigerator
After the refrigerator is put in place, (insuring a combus-
tion seal at the front frame), the refrigerator is to be
secured in the enclosure with six screws. The screws
have to be installed in the following 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 strip is to be installed after
the refrigerator is set into the cut-out opening.
1.
Install the lower front strip by sliding it under the
bottom hinge plates, as shown in FIG. 5.

FIG. 6
2. Secure the refrigerator and the lower front strip with
two screws: One screw through each hinge.
See FIG 6.
Second: Two screws installed in the top frame.
Note: A wood strip must be in place across the upper
opening of the enclosure. The top frame of the refrigera-
tor will be anchored to the wood strip with screws, see
FIG. 10.
Before the screws can be mounted, the top decoration
panel has to be removed.
Open the doors and remove the screws holding the top
decoration panel (both sides). The screws are acces-
sible from beneath. See FIG. 7.
Carefully tilt the top decoration panel and lift up to
remove from top frame. Be careful not to damage the
circuit board and wires.
FIG. 7
Install the two screws in the top frame, the holes are
accessible from beneath.
After the two screws have been installed, seal the holes
in the top frame with a piece of tape.
Replace the top decoration panel with its two screws. Be
careful not to pinch the wires behind the panel.
Third: Two screws installed in the rear base.
See FIG. 8.
Y
Hole for drain water hose
Failure to follow the sequence in securing refrigerator in
enclosure can cause leakage between the frame and
cabinet. Any space between the counter, storage area
or ceiling and top of the refrigerator greater den
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.
Drain water hose
A hole must be drilled through flooring see FIG. 8.
The hole must be drilled in the cut out opening of the
base plate at the rear of the refrigerator. 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 ref-
rigerator is connected to LP gas supply.
To test the gas safety shutoff, proceed as follows:
1.
2.
3.
4.
5.
6.
7.
Start the refrigerator according to the instructions,
and switch to GAS mode. (See start up instructions).
Check that the gas flame is lit and the GAS mode
indicator lamp (C) is on.
Close the manual gas shutoff valve at the back of the
refrigerator. (See FIG. 1).
Wait for one minute. The CHECK indicator lamp (D)
should be on and the GAS mode indicator lamp (C)
should be off.
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 non-corrosive
commercial bubble solution to the burner jet orifice.
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 re-
quired.
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
five minutes.

CERTIFIED INSTALLATION
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.
\
FIG. 9
LOWER VENT CUTOUT
I\ I
13-3/4”
R= 3-1/2”
7
R= 3-11/”
NOTE: RADIUS CAN BE + 1/4” - 0”
HEIGHT AND WIDTH zk 1/8”
FIG. 10
METHODS OF INSTALLATION
The method of installation is shown in FIG. 9. 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.
NOTE: The upper vent should be centered over
the condenser at the back of the refrigerator.
VENTILATION HEIGHTS
Installation with roof
Minimum ventilation
vent and lower side vent
heights in
Refrigerator
I
Inches
I I
mm
NDR 1272
I
65
I I
1651
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.
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 vent to the roof material. For ventilation
height, see table VENTILATION HEIGHTS
See Figures 9, and 10.
NOTE: Wood Strip
MUST be in place.

FIG.
II
Overall
Recess
Refrigerator Dimensions Minimum Dimensions
Model
Height Width
Depth Height Width Depth
A
B C
H W
D
inch 59-31
/32 37-3/8
26-1 1/1 6 59-1/1 6
36-1 /2 24
NDR 1272 mm 1523
949.5 678
1500
927 610
This method of installation and these clearances will give you adequate space for service and proper installation.
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.
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 an Automatic Energy
Selector (AES) control system, which can automatically
select the most suitable energy source which is avail-
able, either 120 Volt AC, or LP gas operation. The system
can be set by the user to be fully automatic, or if desired,
LP gas only. The refrigerator controls will work down to
9.6 volt DC.
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.
Y

A.
B.
C.
1.
2.
3.
1.
2.
3.
A
C
START UP INSTRUCTIONS
A continuous 12 volt DC supply must be available for
the electronic control to function.
Press the main power ON/OFF button (1) to the
DOWN position.
Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired setting is illuminated.
AES/AUTO MODE
Press the AES/AUTO/GAS mode selector button (2)
to the DOWN position. If 120 volts is available, the
AC mode indicator lamp (A) will illuminate indicating
AC operation. If 120 volts AC is not available, the
GAS indicator lamp (C) will illuminate, indicating the
control has automatically switched to the GAS mode.
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).
Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired position is illuminated.
GAS MODE
Move the AES/AUTO/GAS mode selector button (2)
to the UP position. The GAS mode indicator lamp (C)
will illuminate. Within 45 seconds the burner should
be ignited and operating normally.
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 powerON/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.
Press the TEMPERATURE SELECTOR button (3)
until the lamp at the desired position is illuminated.
2 - WAY display panel
D
I
-7
COLD 1 2 3 4 5 COLDEST \
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 em-
ployed.
After the initial start-up, the thermostat should be moved
from “COLDEST” to the desired temperature setting,
usually at 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.

2 - WAY display panel
r7
-oi& -T&y
2
= OFF
L_
/ AC gGAs
CHECK
A
C
DESCRIPTION OF OPERATING
MODES
AES/AUTO MODE
When operating in the AES/AUTO mode, the AES/AUTO
mode indicator lamp (B) will illuminate. The control
system will automatically select between AC and GAS
operation with AC having priority over GAS. Either the
AC indicator lamp (A) 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 be-
comes available again the control will switch back to AC
regardless of the status of GAS operation.
GAS MODE
When operating in the GAS mode the AES/AUTO mode
indicator lamp (B) 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 attempt
to light the burner for a period of approximately 45
seconds. If unsuccessful, the CHECK indicator lamp (D)
will illuminate and the GAS mode indicator lamp (C) will
turn off.
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 45 seconds 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.
COLD 12 3 4 5 COLDEST
LIMP MODE OF OPERATION
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 continu-
ally attempt to reestablish operation of the display mod-
ule.
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 con-
trol system will operate on the energy source selected
via the control panel. The cooling unit will run contin-
uously 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.

HOW TO USE THE REFRIGERATOR
FOOD STORAGE COMPARTMENT
The food storage compartment is completely closed and
unventilated, which is necessary to maintain the re-
quired 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 posi-
tions 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.
When the refrigerator is heavily loaded, it will take a
longer time to lower the temperature; therefore, to get
maximum efficiency the refrigerator and food items
should be pre-cooled prior to loading. The shelves
should not be covered with paper or plastic, and the food
items should be arranged so air can circulate freely.
Two door shelves are equipped with fingers. The fingers
are designed to prevent large containers
(1/2 gallon milk
or juice) from shifting or spilling while traveling.
FROZEN FOOD STORAGE
COMPARTMENT
Quick frozen soft fruits and ice cream should be placed
in the coldest part of the compartment, which is on the
top 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 pre-cooled first in the refrigerator. They
can be stored about three times longer in the frozen food
compartment as compared to the fresh food compart-
ment. To prevent food from drying out, keep it in covered
dishes, containers, plastic bags or wrapped in aluminum
foil.
Total Refrigerated Volume 11.6 cu.ft.
ICE MAKING
Ice cubes can be made in the ice trays placed in the
freezer compartment. The trays should be filled with
water to within
1/4” (5 mm) from the top. For faster ice
making, the trays should be placed in direct contact with
the freezer shelves.
To release the ice cubes, seize the tray with both hands
and twist the tray. Cubes not required should be replaced
in the tray. Refill the tray with water and replace the tray
on 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 the thermo-
stat back to normal setting, usually about mid setting
when the ice is formed. Food in the fresh food compart-
ment may be frozen if the setting is left on “COLDEST”
position.
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 on the freezer
shelves.
When all the frost has melted, dry the interior of the
refrigerator and freezer with a clean cloth. Replace all
food and set the thermostat to the COLDEST tempera-
ture setting for a few hours. Then reset the thermostat to
the desired setting, usually at mid setting.
DO NOT use a hot air blower. Permanent damage
could result from warping the metal or plastic parts.
DO NOT use a knife or an ice pick, or other sharp
tools to remove frost from the freezer shelves. They
can create a leak in the ammonia system.
CLEANING
Cleaning the refrigerator is usually done after it is de-
frosted 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, ice trays
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 - STORAGE 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.
DO NOT store explosive substances in the refrig-
erator, such as cigarette lighter gas, petrol, ether
or the like.
CLIMATE CONTROL HEATER
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 behind the freezer door to ON.
The climate control can be left on continuously or only
used when temperatures require it.
NOTE: The climate control will draw 12 volts DC power
continuously when in the ON position. It should be turned
OFF when a charging source is not available.

GAS EQUIPMENT ASSEMBLY
uarter dollar or a slotted
SPARK
ELECTRODE
FIG. 12
BURNER TUBE /
JET/BURNER
ELECTRIC EQUIPMENT
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.
This model is equipped with two electrical heaters for
120 volt AC.
To replace the heater proceed as follows:
1.
2.
3.
4.
5.
6.
Disconnect the wall plug, and the 12 volt wires.
Remove the protection cover see FIG. 1
Remove the power module cover see FIG. 1
Disconnect the heater leads.
With a pair of pliers unfold the lug holding the lid of
the boiler casing and open the lid.
Remove some insulation wool so that the heater is
accessible.
7.
8.
9.
Turn and lift the heater out of its pocket.
Fit the new heater into the pocket.
Connect the leads and put on the power module
cover.
10.
Reset the insulation and close the lid of the boiler.
11.
Replace the protection cover.
FUSES
This model is equipped with 2 fuses, one for the refrig-
erator control system and one for AC cartridge heater.
(See table below).
To replace fuses 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.
\PRESSURE TEST PORT
MAINTENANCE & SERVICE
1. 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
connections for gas leaks.
Refer to section INSTALLATION, page 4 to 8.
2.
A.
PERIODIC MAINTENANCE
To keep your Dometic refrigerator operating efficient-
ly and safely, periodic inspection and cleaning of
several components once or twice a year is recom-
mended.
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.
Control system 3 Amp
AC heater 5 Amp

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.
C.
D.
E.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Check the AES control system by connecting/discon-
necting 120 volt AC power, start/stop the engine, etc.
Compare the operation with the operation described
in description of operating modes. Page 10.
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.
The LP gas pressure should be checked and the
main regulator re-adjusted if pressure is incorrect.
The correct operating pressure is 11 inches of water
column. The correct place to take the LP gas pres-
sure is at the test port just ahead of the burner jet.
(See FIG. 12).
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:
Unplug the refrigerator power cord from the 120 volt
AC outlet. (See FIG. 3).
Disconnect or shut off the 12 volt power to the
refrigerator.
Turn manual shutoff valve to OFF. (See FIG. 1).
Remove cover from the burner housing. (See FIG.
1).
Disconnect the wire from the high voltage electrode.
Remove the burner mounting screws and remove the
burner assembly. (See FIG. 12).
Remove the wire and the flue baffle from the top of
flue tube. 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 the flue baffle.
Clean burner tube with a brush. Blow out burner with
compressed air.
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. Re-install and tighten burner jet.
NOTE: The color of the flame shall be clear blue over
the slots of the burner. (See FIG. 13).
Clear blue color
of flame
FIG. 13
/
______
\
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.
11.
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).
Be sure to reconnect the wire to high voltage elec-
trode. Check the electrode for-proper location and
gap. (See FIG. 14).
FIG. 14
Electrode
- Burner tube
12. Turn on manual gas shutoff valve and check all
fittings for leaks.
13. Connect 120 volt power cord to the outlet and recon-
nect or turn on the 12 volt DC power.
14. Check LP gas safety shutoff. See page 6.
TROUBLESHOOTING
The Refrigerator Does Not Cool Properly
Causes and remedies
Failure of refrigeration does not necessarily indicate that
the cooling system is defective. Other factors governing
its operation must be checked.
1.
1a.
1b.
1c.
1d.
1e.
Common.
Fuse(s) blown, replace (see page 12).
Check level of refrigerator.
Venting problem. Restriction in air flow across cool-
ing unit.
Heavy frost buildup on evaporator fins. Defrost.
If the refrigerator has been operating on gas and a
loss of cooling is noted, convert the refrigerator to AC
power (see start up instructions page 9).
If the refrigerator has been operating on AC, switch
to gas operation. This will determine if a component
failure in the electric or gas controls is causing the
cooling fault. After the refrigerator has been con-
verted from one power source to the other (gas to
AC, or AC to gas) allow time to assure the unit is
cycling properly. At the end of the period the freezer
plate should start to cool.

1f.
1g.
lh.
A minimum of 9.6 volt DC supply present for the
refrigerator control system.
The thermostat can not be moved from MID position
to the desired setting. The display module has be-
come non functional. See limp mode of operation
(page 10).
The refrigerator is running continuously and cool to
much.
The temperature sensing device has become non
functional. See limp mode of operation (page 10).
2.
2.1
Gas operation only.
2.2
2.3
2.4
The refrigerator will not operate on gas when AC is
present.
The display module has become non functional. See
limp mode of operation (page 10).
Burner jet clogged. Clean see Section Mainte-
nance/service, item 2. Periodic maintenance, Para-
graph E. item 9.
Flue baffle not inserted properly in flue tube (see
page 3, FIG. 1).
Burner dirty. Clean. See Section Maintenance/ser-
vice, item 2. Periodic Maintenance, Paragraph E.
item 8.
2.5LP gas pressure low at burner.
Set main regulator so pressure does not drop below
11 inches water column at pressure test port (see
page 12, FIG. 12).
2.6
Burner not located properly under flue tube, relocate.
2.7
Burner damage, replace.
INSTRUCTION FOR MOUNTING
THE DOOR PANEL
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 on this page and the instructions are read
thoroughly.
When mounting the panel, proceed as follows:
See figure page 15.
A.
B.
C.
D.
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 three screws
(1 ), fresh food compartment door. Two screws on the
freezer compartment door.
Insert the vertical edges into the grooves of the door
frame (3).
Push the panel downward so that the lower horizontal
edge of the panel (4) is fitted into the bottom groove
(5).
Put the decoration strip across the door so that the
gap is covered. Secure the decoration strip with the
screws removed in Step A (1).
PANEL DIMENSIONS
MAX. THICKNESS
5/32” (4 mm)
REFR.MODEL HEIGHT WIDTH
NDR 1272
MAX. MIN.
MAX. MIN.
Frozen Food 55-3/16 55-1/8 1 0-9/16 10-7/16
Comp.
(1402) (1400)
(268) (265)
ODOR FROM FUMES
CAUSES AND REMEDIES
A. The flame touches side of the boiler due to dislocation
of the burner. Relocate. Burner dislocation may also
cause smoke and discoloring of walls and ceiling.
B. Burner damaged. Replace.
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 adjust-
ments and unfavorable installation conditions. Contact
service point or distributor service dept. for assistance.
Replacement Parts Suppliers: See page 1.
Fresh Food
55-3/16 55-1/8 20-3/4 20-5/8
Comp.
(1402) (1400)
(527) (524)

4
-
-1
CERTIFIED VENT SYSTEM KITS
Refr.
Kit
Model
No.
Components Part No.
NDR 1272 5A
Roof Base
3103633.xxx *
Roof Cover
3103634.xxx *
Lower Side Vent 3103847.004
3105101.000
Power Vent Asm. 3104131.002 **
* Fill in “xxx” with color code numbers. For color codes, contact your supplier.
** Alternate instructions forwarded with the Vent Kit.
For further information, contact your dealer or distributor.

SPARE PARTS
The following list is a list of commonly used parts which
should be available, if required, from your
Dometic
Service Center.
Part No.
17 37 58-03/8
95 50 01 -67/2
20074
1 9-33/2
293 11 32-01/9
293
14 95-01/0
293 18 26-02/4
293 21 06-01/2
29325
75-04/2
29325 76-04/0
29326 21-05/1
29326 21-06/9
29326 58-01/2
29326
67-05/4
Description
Heater, 210W, 120V
Burner pipe, cpl.
Jet, No. 76
Spark ignition device
Electrode
Thermocouple
Lamp cover
Doorshelf, lower
Doorshelf, 5 pieces
Box vegetable-, 2 pieces (crisper)
Box vegetable-, (meat locker)
Bottle holder, 4 pieces
Baffle
Contact an authorized service center for
parts and repairs as needed.
293 27 60 1 1 1
-12
.2
i
1
V
L#
0
t
JlO
+i
L
@-- BLACK
@ BROWN
e RED
@ YELLOW
& GREEN
- @ GREEN/YELLOW
@- BLUE
@ GREY
@- WHITE
@- BRANCHING CONTACT
@ CHASSIS GROUND
@- CIRCUIT BOARD DISPLAY
@ CIRCUIT BOARD POWER
@- ELECTRODE
@ FUSE 3A
@- FUSE 5A
@ HEATER 12OV AC
@- HEATING CABLE
@ LIGHT
@- PROTECTIVE EARTH
1
- 0 REIGNITER
* RETAINER
- @ SOLENO ID VALVE
@- SWITCH
@ SWITCH LIGHT
* TERMINAL BLOCK
@ TEST POINT
@- THERMISTOR
@ THERMOCWPLE