Dometic RM7732 Operating instructions

RECORD THIS INFORMATION FOR FUTURE REFERENCE
BEFORE INSTALLING THE UNIT:
Model No. _______________ Serial No. ______________________
Date Purchased ___________ Place of Purchase _______________
MODEL RM7732
Automatic Ener
gy Selector
Energy
USA
SERVICE OFFICE
The Dometic Corp.
509 So. Poplar St.
LaGrange, IN 46761
219-463-4858
CANADA
Dometic Dist.
866 Langs Dr.
Cambridge, Ontario
CANADA N3H 2N7
519-653-4390
For Service Center
Assistance Call:
800-544-4881
REFRIGERA
TOR FOR LP/GAS
REFRIGERAT
AND ELECTRIC OPERA
TION
OPERATION
FOR YOUR SAFETY
If you smell gas:
1. Shut off gas supply at
main valve.
2. Open windows.
3. Don't touch electrical
switches.
4. Extinguish any open
flame.
5. 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.
INST
ALLA
TION &
INSTALLA
ALLATION
OPERA
TING INSTR
UCTIONS
OPERATING
INSTRUCTIONS
Form No. 3106864.006 12/95
The Dometic Corp.
LaGrange, IN 46761
Copyright 1995 The Dometic Corporation
INDEX
Page
Installation .............................. 2
Operating Instructions ............ 8
Maint. & Service ..................... 112
This Manual should be read and
understood before installation,
adjustment, service or maintenance
is performed. This unit must be
installed and serviced by a qualified
serviceman. Modification of this
appliance can be extremely hazardous and could result in personal
injury or property damage.
Lire et comprendre ce manuel avant de
procéder à l'installation, à des
réglages, de l'entretien ou des
réparations. L'installation et l'entretien
de cet appareil doivent être effectués
par un réparateur qualifié. Toute modification de cet appareil peut être
extrêmement dangereuse et entraîner
des blessures ou dommages
matériels.
REFRIGERA
TOR
REFRIGERAT
MODEL
RM7732
Product No. 921148003
IMPORTANT INSTRUCTIONS
READ CAREFULLY
SECTION A. INST
ALLA
TION
INSTALLA
ALLATION
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.
1. GENERAL INSTRUCTIONS
This appliance is designed for storage of foods and
storage of frozen foods and making ice.
The refrigerators outlined herein have been design certified by A.G.A. under ANSI Z21.19 Refrigerator Standard
for installation in a mobile home or recreational vehicle and
are approved by the Canadian Gas Association.
The certifications are, however, contingent on the
installation being made in accordance with the following
instructions as applicable.
3. CERTIFIED INSTALLATION
Certified installations require one roof vent and one lower
side vent.
For certified vent system kits, see Section B.
For further information, contact your dealer or distributor.
In the U.S.A., the installation must conform with:
1. National Fuel Gas Code ANSI Z223.1-(latest edition)
2. Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280
3. Recreational Vehicles ANSI A119.2-(latest edition).
4. METHOD OF INSTALLATION
The method of installation is shown in FIG. 1. 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.
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.
NOTE
NOTE: The upper vent should be
centered over the condenser coil
at the back of the refrigerator.
4. Any applicable local code.
In Canada, the installation must conform with:
1. Current CGA B 149 Gas Installation Codes
2. Current CSA Standard Z 240.4 GAS-EQUIPPED RECREATIONAL VEHICLES AND MOBILE HOUSING
3. Any applicable local code
The unit must be electrically grounded in accordance with
the CANADIAN ELECTRICAL CODE C 22 Parts 1 and 2.
FIG. 1
MINIMUM
VENTILATION
HEIGHT
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. Louvers for air
supply or for venting of combustion products shall have a
minimum dimension of not less than 1/4 inch. See Sec. B
for approved vents.
Proper installation requires one fresh air intake and one
upper exhaust vent. The ventilation kits shown in this
instruction manual have been certified for use with the
refrigerator model listed in the Table. For "Certified Vent
System Kits" see Section B. 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 ventilation air must not be obstructed.
2
6. CLEARANCES
5. VENTILATION HEIGHTS
Minimum clearances in inches
are:
G : Top
K: Side
L: Bottom
M : Rear
N:
Refer to FIG 1., Page 2
Installation with roof
vent and lower side vent
Minimum Ventilation
heights in:
REFRIGERATOR
INCHES
MM
65
1651
RM7732
NOTE: Clearance "N
N" is the distance between the
bottom of the lower vent to the roof material. For
ventilation height, refer to Section A. Installation, Item
5. Ventilation Heights. See FIG. 2.
3-1/2"
3-1/2"
NOTE: Wood strip MUST be in
place. See Page 4, Item 7
FIG. 2
28-7/8"
NOTE: RADIUS CAN BE +1/4"–0"
HEIGHT AND WIDTH ± 1/8"
FIG. 3
Refrigerator
Model
RM7732
Overall
Dimensions
Recess
Dimensions
Height
A
Width
B
Depth
C
Height
H
Width
W
Depth
D
(Inches) 59-5/8
33-9/16
25-15/16
59-1/16
32-11/16
24
852
659
1498
830
610
(mm)
1523
0"
0"
0"
0"
65"
M" is between the rearmost part of
NOTE: Clearance "M
the refrigerator and the wall behind the refrigerator.
LOWER VENT CUTOUT
13-3/4"
to combustible materials
3
7.
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
the full width and depth of the appliance.
INSTALLING REFRIGERATOR IN
ENCLOSURE
The transport support at the rear of the refrigerator can be
removed if necessary for the installation of the refrigerator
in the enclosure. (See FIG. 4)
Any space between the counter, storage area or ceiling
can trap heat produced at the rear of the refrigerator. Any
space between the top and sides of the refrigerator should
be blocked for maximum refrigerator performance.
FIG. 4
CONDENSATE WATER DRAIN HOSE: A 3/4" hole
must be drilled through the flooring in the opening of the
base plate on the rear of the refrigerator (see FIG. 10). The
installer must make sure that the hose does not kink when
run through the floor. Seal around the hose where it goes
through the hole. If a longer hose is required, follow the
illustration shown below:
OPTION A:
1) Remove black water check valve from hose
2) Add additional hose
3) Reinstall black water check valve (see FIG. 6)
INSTALLATION: 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. Also apply a
sealing strip to the bottom of the trim strip on the front base
as shown in FIG. 5. The sealing should provide complete
isolation of the appliance's combustion system from the
vehicle interior.
OPTION B:
1) Cut drain hose at location shown above
2) Install new drain hose between pieces cut. (see FIG. 6)
FIG. 6
A wood strip must be in place across the upper opening of
the enclosure. The top frame of the refrigerator will be
anchored to the wood strip with screws. See FIG. 2.
NOTE
NOTE: Black water check valve must be reinstalled to
ensure proper refrigerator operation. DO NOT KINK HOSE.
The dimensions shown in FIG. 3 will give you adequate
space for proper installation.
OPTION C:
In vehicles where routing the drain hose through the floor
is not possible, a metal clip is available. The clip is used to
drain water out through the side vent.
FIG. 5
Part No.
Part No.
Part No.
Part No.
Sealing strip applied
to bottom of trim strip
3106590.007
3106590.015
3106559.002
3106559.010
Clip for plastic side vent (50 qty.)
Clip for plastic side vent (single)
Clip for metal side vent (50 qty.)
Clip for metal side vent (single)
SECURING THE REFRIGERATOR:
After the refrigerator is mounted in place (ensuring a
combustion 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:
Sealing strip placed on
front of compartment floor
NOTE
NOTE: Be careful not to damage the sealing strip applied
to the floor of the enclosure when the refrigerator is put in
place.
4
STEP 1: Two screws installed through the front
base, which includes the lower front strip installation.
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.
C. Install the second two screws in the top frame as
shown in FIG. 10, and replace decoration panel,
being careful to not pinch wires.
A. Install the lower front strip by maneuvering it under
the bottom hinge plates, as shown in FIG. 7.
FIG. 7
FIG. 10
STEP 3: Two screws installed in the rear base.
See FIG. 11
B. Secure the refrigerator and the lower front strip with two
screws: One screw through each hinge. See FIG. 8.
FIG. 11
FIG. 8
Screws
STEP 2: Install the two screws in the top frame
frame.
A. The top decoration panel must be removed from the
refrigerator before the screws can be installed.
Open refrigerator and freezer doors and remove the
two screws that secure decorator panel to top
frame. See FIG. 9.
B. Carefully tilt the top decoration panel and lift up to
remove from top frame. See FIG. 9.
Failure to follow the sequence in securing refrigerator
in the enclosure can cause leakage between the frame
and cabinet.
8. GAS CONNECTION
Hook up to the gas supply line is accomplished at the
manual gas shutoff valve, which is furnished with a 3/8"
SAE (UNF 5/8" – 18) male flare connection. A backup
wrench must be used when tightening the gas supply line.
All completed connections should be checked for leaks
with a noncorrosive leak detector. (See FIG. 12 – Gas
Shut-Off Valve may have a different orientation than
shown).
FIG. 9
DO NOT USE A FLAME
TO CHECK FOR GAS LEAKS.
5
E. Remove cover (see FIG. 12) and open the manual gas
valve. Apply a noncorrosive commercial bubble solution
to burner jet (see FIG. 12).
The gas supply system must incorporate a pressure
regulator to maintain a supply pressure of not more than
13-1/2 inches water column, (static) no load.
LP GAS
CYLINDER
DO NOT USE A FLAME
TO CHECK FOR GAS LEAKS.
PRESSURE
REGULATOR
F. No bubbles should appear at the opening of the burner
jet. The presence of bubbles indicates a defective gas
safety shutoff, and service is required.
TO
REFRIGERATOR
G. If no bubbles were present at the burner jet, the gas
safety valve is working properly. Rinse jet thoroughly
with fresh water before proceeding. Be careful not to
damage burner jet. Replace cover and turn the main
switch OFF and back ON. (See "Section C. Operation
Instructions, Item 2. Control Panel"). Normal operation
of the burner should return. Allow the burner to operate
for a minimum of 5 minutes.
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 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.
10. 120 VOL
TA
C ELECTRICAL
OLT
AC
CONNECTION
9. TESTING LP GAS SAFETY SHUT
OFF
SHUTOFF
The refrigerator is equipped with a three-prong (grounded)
plug for protection against shock hazards, and should be
plugged directly into a properly grounded three-prong
receptacle.
The gas safety shutoff must be tested after the refrigerator
is connected to LP gas supply.
To test the gas safety shutoff, proceed as follows:
A. Start the refrigerator according to the instructions, and
switch to gas mode. See "Section C. Operation Instructions."
B. Check that the gas flame is lit and the gas mode
indicator lamp (C) is on. See FIG. 15.
C. Close the manual shutoff valve at the back of the
refrigerator. (See FIG. 12)
D. Wait for one minute. The check indicator lamp (D)
should now be lit and the gas mode indicator lamp
should be off.
DO NOT cut or remove the grounding prong from this
plug.
The power cord should be routed to avoid direct contact
with the burner cover, flue cover or manual gas shutoff
valve knob. 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. 13).
FIG. 12
FIG. 13
6
11. 12 VOL
T DC CONNECTION
OLT
12. INSTR
UCTION FOR INST
ALLING
INSTRUCTION
INSTALLING
DOOR P
ANEL
PANEL
This refrigerator model is not designed for 12 volt DC
operation of the cooling system; however, 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 of the
terminal block on back of refrigerator (See FIG. 12). The
12 volt DC supply circuit must be fused, and the maximum
fuse size is 5 amps.
The refrigerator is delivered without the 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 FIG.
14).
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 by removing the three screws on the
fresh food compartment door; and the two screws on
the freezer compartment door.
B. Make sure the two pins are in the end frame of the door
to support the panel. See FIG. 14.
C. Slide panel into grooves on vertical edges of the door
until it rests on the pins at the lower frame of door.
D. Replace the trim strip and screws.
DO NOT use the body or chassis of the vehicle as a
substitute for either of the two conductors. Do not connect
any other electrical equipment of lighting to the refrigerator
circuit.
Clean Direct Current (DC) power is mandatory for
high-tech circuits to operate as designed. The sources
for DC power are a battery and a converter.
A battery will provide straight line DC power, but
extended operation will require recharging of the
battery by the converter or the alternator.
The converter and alternator produces DC power by a
series of diodes that rectify alternating current to DC.
A battery or capacitors can be used to clean up the AC
ripple that is present after AC voltage has been rectified.
FIG. 14
PANEL DIMENSIONS
MAX. THICKNESS 5/32" (4mm)
REFR. MODEL
RM7732
HEIGHT
MAX.
MIN.
WIDTH
MAX.
MIN.
Frozen Food
Compartment
55-3/16
(1402)
55-1/8
(1400)
10-9/16
(268)
10-7/16
(265)
Fresh Food
Compartment
55-3/16
(1402)
55-1/8
(1400)
16-15/16 16-13/16
(430)
(427)
SECTION B. CERTIFIED VENT SYSTEM KITS
REFRIGERATOR
MODEL
KIT
NO.
RM7732
COMPONENTS
PART NO.
OPTION #1
ROOF BASE
ROOF COVER
LOWER SIDE VENT
3103633.XXX*
3103634.XXX*
3103847.004
OPTION #3-A
POWER VENTILATOR
(Island/through floor)
POWER VENT ASM.
ROOF BASE
ROOF COVER
3104131.002**
3103633.XXX*
3103634.XXX*
* Fill in "XXX" with color code numbers. For color codes, contact your supplier.
** Alternate instructions forwarded with the Ventilator Kit.
7
SECTION C. OPERA
TING INSTR
UCTIONS
OPERATING
INSTRUCTIONS
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.
1. IMPOR
TANCE OF LEVELING A REFRIGERA
TOR
IMPORT
REFRIGERAT
In an absorption refrigerator system, ammonia is liquefied
in the finned condenser coil at the top 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.
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 floors or walls).
When the vehicle is moving, the leveling is not critical as
the rolling and pitching motion of the vehicle will pass to
either side of level, keeping the liquid ammonia from
accumulating in the evaporator tubing.
The tubing in the evaporator section is specifically sloped
to provide a continuous movement of liquid ammonia
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.
FIG. 15
2-WAY DISPLAY PANEL
2. CONTROL PANEL
LEGEND 2-WAY AES MODEL
1. Main Power Button ON/OFF
2. AES/AUTO/GAS Mode Selector Button
3. Temperature Selector Button
A.
B.
C.
D.
E.
F.
AC Mode Indicator Lamp
AES/AUTO/ Mode Indicator Lamp
GAS Mode Indicator Lamp
CHECK Indicator Lamp
Temperature Indicator Lamps
Climate Control Switch
8
3. ST
AR
T-UP INSTR
UCTIONS
STAR
ART
INSTRUCTIONS
B. GAS MODE
Move the AUTO mode selector button (2) to the UP
position. The GAS mode indicator lamp (C) will illuminate. After 45 seconds the burner should be ignited and
operating normally.
2-WAY DISPLAY PANEL
BD
ON
AUTO
1
OFF
AB
CHECK COLD 1
2
3
4
AC
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 main
power ON/OFF button (1) to the OFF 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 (E) at the desired position is illuminated.
5 COLDEST
3
2
GAS
CC
E
D
EF
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. 12.
C. 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.
This refrigerator is equipped with a control system, which
can automatically select the most suitable energy source
which is available, either AC or LP gas operation. The
system can be set by the user to be fully automatic, or if
desired, LP gas only.
After the initial start-up, the thermostat should be moved
from "COLDEST" to the desired temperature setting is
usually about mid-setting.
1. A 12 volt DC supply must be available for the electronic
control to function. The refrigerator controls will work
down to 9.6 volts DC.
2. Press the main power ON/OFF button (1) to the DOWN
position.
3. Press the TEMPERATURE SELECTOR button (3) until
the lamp at the desired setting is illuminated.
D. 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
(1) to the UP (OFF) position. This shuts off DC power to
the refrigerator, including the interior light; however, the
climate control will remain on. See Item 5, Step G on
Page 10.
A. AUTO MODE
Press the AUTO mode selector button (2) to the DOWN
position. If 120 volts AC is available, the AC mode
indicator lamp (A) will illuminate indicating AC operation.
If 120 volts AC is not available, the GAS mode indicator
lamp (C) will illuminate and the control system will
automatically switch to GAS operation.
4.
DESCRIPTION OF OPERA
TING
OPERATING
MODES
A. AUTO 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 GAS
MODE.
When operating in the AUTO mode, the 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 becomes
available again, the control will switch back to AC
regardless of the status of GAS operation.
Press the TEMPERATURE SELECTOR button (3) until
the lamp at the desired position is illuminated.
9
B. GAS MODE
5. HO
W TO USE THE REFRIGERA
TOR
HOW
REFRIGERAT
When operating in the GAS mode, the 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.
A. FOOD STORAGE COMPARTMENT
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.
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 second ignition
sequence.
B. FROZEN FOOD STORAGE
COMPARTMENT
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.
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.
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.
C.
ICE MAKING
Ice cubes can be made in the ice tray placed in the freezer
compartment. The tray should be filled with water to within
1/4" (5mm) from the top. For faster ice making, the tray
should be placed in direct contact with the freezer shelf.
C. STANDBY 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.
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.
If for some reason the display module becomes nonfunctional, the control system will revert to full automatic
operation selecting the best energy source available
with AC as first priority, and GAS as the second priority.
The temperature of the refrigerator will be maintained at
the MID position within normal temperature tolerances.
The power module will continually attempt to
re-establish operation of the display module.
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
thermostat back to normal setting, usually about midsetting when the ice is formed. Food in the lower compartment may be frozen if the setting is left on "COLDEST"
position.
The second standby 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.
D.
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 tray with hot water and placing it
on the freezer shelf.
10
G. CLIMATE 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.
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 shelf. They can create a leak in the
ammonia system.
This refrigerator comes standard with a 12 volt (DC)
climate control that will evaporate the water droplets when
they form.
To have this climate control on, you position the switch
(See "F", Fig. 9) located behind freezer door on the panel
under the freezer to ON. The climate control can be left on
continuously or only used when temperatures require it.
When all frost is melted, dry the interior of the refrigerator
with a clean cloth. Replace all food and set thermostat to
the COLDEST temperature setting for a few hours. Then
reset the thermostat to the desired setting, usually at midsetting.
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.
E.
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, 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.
F. SHUTOFF (STORAGE PROCEDURE)
Shut off the refrigerator by pressing the main power ON/
OFF button to the UP (OFF) position. (See FIG. 15)
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 tray should also be dried and kept
outside the cabinet.
DO NOT store explosive substances in the refrigerator, such as gasoline and other flammable vapors or
liquids.
(Section D. Maintenance & Service
continued on Page 12)
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SECTION D
VICE
D.. MAINTENANCE & SER
SERVICE
TIPS FOR THE SERVICE TECHNICIAN
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.
1. REFRIGERATOR REMOVAL
C. Check the AES control system by connecting/disconnecting 120 volt AC power, start/stop the engine, etc.
Compare the operation with the operation described in
Section C. Operation Instructions.
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. Cap the
gas supply line, loosen the screws anchoring the refrigerator to the enclosure and slide the refrigerator out of the
compartment.
D. 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 column.
The correct place to take the LP gas pressure is at the
test port just ahead of the burner jet. (See FIG. 16)
Replacement is the reverse of removal. Check all connections for gas leaks. Refer to Section A, Item 1 to 12 of
Installation Instructions.
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. 13).
2) Disconnect or shut off the 12 volt power to the
refrigerator.
3) Turn manual shutoff valve to OFF. (See FIG's. 12 &
16).
4) Remove cover from the burner housing. (See FIG.
12).
5) Disconnect the wire from the high voltage electrode.
6) Remove the burner mounting screws and remove
the burner assembly.
7) 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 clan 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.
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
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.
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 noncorrosive 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 LP GAS SYSTEMS AND REFRIGERATORS.
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
hazard.
DO NOT USE A FLAME
TO CHECK FOR GAS LEAKS.
12
FIG. 16
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. 17).
FIG. 17
F. FUSES
The refrigerator is equipped with two fuses; one for the
refrigerator control system, and one for the AC cartridge
heat. (See Table 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. 12.
3. Snap the fuse out of the fuse holder.
4. Fit a new fuse into the fuse holder.
5. Replace the power module cover.
ELECTRODE
Control System
3-amp
AC Heater
5-amp
1/8" TO 3/16"
(3-5 mm)
BURNER TUB
12) Turn on manual gas shutoff valve and check all
fittings for leaks.
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 Section A. Installation, Item 9. Testing LP Gas Safety Shutoff.
(3. Troubleshooting
Continued on Page 14)
13
3. TROUBLESHOOTING
H. LP gas pressure low at burner.
Set main regulator so pressure does not drop below 11
inches water column at pressure tap.
Refrigerator Does Not Cool Properly
A. Burner jet clogged.
Clean. See Section D. Maintenance & Service, Item 1.
Periodic Maintenance, Paragraph E. Item 19.
I. Burner not located properly under flue tube.
Relocate.
B. Check level of refrigerator.
J. Burner damaged.
Replace.
C. Venting problem.
Restriction in air flow across cooling unit.
D. Heavy frost buildup on evaporator fins.
Defrost.
K. Odors and fumes.
1. Dislocated burner
2. Damaged burner
3. Dirty flue tube
E. Flue baffle not inserted properly in flue tube.
F. Improperly set thermostat.
See Section C. Operating Instructions, Item 4.
Paragraph F.
L. FUSES
1. Refrigerator AC Supply
2. Refrigerator DC Supply
3. Control system. See Section D. Maintenance &
Service, Item 2. Paragraph F.
G. Burner dirty.
Clean. See Section D. Maintenance & Service, Item 1.
Periodic Maintenance, Paragraph E.8.
Contact an authorized service center
for parts and repairs as needed.
14