Dometic RM4873 User manual

1
Form No. 3106402.005 6/95
TheDometicCorp.
LaGrange,IN46761
Copyright1995TheDometicCorporation
INSTALLATION &
OPERATINGINSTRUCTIONS
RECORD THIS INFORMATION FOR FUTURE REFERENCE
BEFORE INSTALLING THE UNIT:
Model No._______________ _____________________Serial No.
Date Purchased__________ Place of Purchase______________
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
INDEX Page
Installation.............................. 2
Operating Instructions.......... 8
Maint. & Service....................13IMPORTANTINSTRUCTIONS
READCAREFULLY
Model RM4873
REFRIGERATOR FOR LP/GAS
AND ELECTRIC OPERATION
FOR YOUR SAFETY
If you smell gas:
1.Shut off gas supply at the
main LP gas tank valve.
2.Openwindows.
3.Don't touch electrical
switches.
4.Extinguish any open flame.
5.Immediately call your gas
supplier or service agency.
FOR YOUR SAFETY
Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.
REFRIGERATOR
MODEL
RM4873
3-WAY ELITE
Improperinstallation,adjustment,
alteration, service or maintenance
can cause injury or property dam-
age. Refer to this manual. For assis-
tance or additional information
consult a qualified installer, service
agency or the gas supplier.
! AVIS
Cet appareil doit être réparé
seulement par un réparateur
autorisé. Modification de l'appareil
pourrait être extrèmement
dangeruse, et pourrait causer mal
ou mort.

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 certi-
fied 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.
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 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 CGA B 149 Gas Installation Codes
2. Current CSA Standard Z 240.4 GAS-EQUIPPED REC-
REATIONAL 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.
2. VENTILATION
The installation shall be made in such a manner as to
separatethecombustion system from the living space of the
mobile home or recreational vehicle. Louveropeningsforair
supply or for venting of combustion products shall have a
minimum dimension of not less than 1/4 inch.
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
theoutsideatfloor level in the refrigeratorcompartment must
be provided forventilation 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.
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.
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.
4. METHOD OF INSTALLATION
The method of installation is shown in FIG. 1. It is essential
that all maximum or minimum dimensions are strictly main-
tained as the performanceof 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 coil
at the
back of the refrigerator.
FIG. 1
2

3
5.VENTILATION HEIGHTS
Refer to FIG 1., Page 2
Installation with roof Minimum Ventilation
vent and lower side vent heights in:
REFRIGERATOR INCHES MM
RM4873 63-3/4 1620
LOWERVENTCUTOUT
UPPERVENTCUTOUT
5-1/2"
21-9/16"
13-3/4"
23-3/4"
NOTE: All cutout dimensions are +/– 1/8".
6.CLEARANCES
Minimumclearancesininchestocombustiblematerialsare:
G: Top 0"
K: Side 0"
L: Bottom 0"
M: Rear 0"
N: SeeNOTE
NOTE:Clearance"M"isbetweentherearmostpartofthe
refrigeratorandthewallbehindtherefrigerator.
NOTE:Clearance"N"isthedistancebetweenthebottom
of the lower vent to the roof material. For ventilation
height,referto SectionA.Installation,Item5.Ventilation
Heights . See FIGS. 1 & 2.
FIG. 2
FIG. 3
Refrigerator Overall Recess Total
Model Dimensions Dimensions Ref. Vol.
Height Width Depth Height Width Depth
RM4873 A B C H W D Cu. Ft.
(Inches) 60-15/16 24-11/16 24-7/8 59-15/16 23-11/16 24
(mm) 1530 627 632 1522 601 608 7.3
NOTE: Wood Strip MUST be in
place. See Page 4, Item 7

4
7. INSTALLING REFRIGERATOR IN
ENCLOSURE
NOTE:DONOT installthe appliancedirectlyon carpeting.
Carpetingmustberemovedorprotectedbyametalorwood
panelbeneaththeappliance,whichextendsatleastthefull
widthanddepth of theappliance.
Anyspacebetweenthecounter,storageareaorceilingcan
trapheatproducedattherearoftherefrigerator.Anyspace
between the top and sides of the refrigerator should be
blockedformaximumrefrigeratorperformance.
CONDENSATEWATERDRAINHOSE:A3/4"holemustbe
drilledthroughtheflooringintheopeningofthebaseplateon
therearofrefrigerator(seeFIG.5D).Theinstallermustmake
surethatthehosedoesnotkinkwhenrunthroughthefloor.
Seal around the hose where it goes through the hole. If a
longerhoseisrequired,followtheillustrationshownbelow:
OPTION A:
1) Remove black water check valve from hose.
2) Addadditionalhose
3) Reinstall black water check valve
OPTION B:
1) Cutdrain hoseatlocation shown below.
2) Install new drain hose between pieces cut.
NOTE: Black water check valve must be reinstalled to
ensureproperrefrigeratoroperation.DONOTKINKHOSE.
OPTION C:
Invehicleswhereroutingthedrainhosethroughtheflooris
not possible, a metal clip is available. The clip is used to
drain water out through the side vent.
Part No. 3106590.007 Clip for plastic side vent (Qty. 50)
Part No. 3106590.015 Clip for plastic side vent (Single)
Part No. 3106559.002 Clip for metal side vent (Qty. 50)
PartNo.3106559.010 Clip formetal side vent(Single)
INSTALLATION: The refrigerator must be installed in a
substantialenclosureandmustbelevel.Wheninstallingthe
refrigerator in the enclosure, all areas within the recess in
whichtherefrigeratorisinstalledmustbesealed.Makesure
thatthereis acompletesealbetweenthe frontframeofthe
refrigeratorandthetop,sidesandbottomoftheenclosure.
Alength of sealingstrip isappliedto therear surface ofthe
frontframeforthispurpose.Alsoapplyasealingstrip tothe
foremostfloor ofthe enclosureand applya secondsealing
striptothebottomofthetrimstriponthefrontbaseasshown
in FIG. 4. The sealing should provide complete isolation of
theappliance'scombustionsystemfromthevehicleinterior.
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.
The dimensions shown in FIG. 3 will give you adequate
spaceforproperinstallation.
NOTE: Ifthedoorishingedanditneedsbechangedtothe
opposite side, it must be done before the refrigerator is
installed in the enclosure. See Step. 13.
NOTE:Becarefulnottodamagethesealingstripappliedto
theflooroftheenclosurewhentherefrigeratorisputinplace.
Therefrigeratorissecuredintheenclosurewithsixscrews.
They must be installed in the following order:
a. First: Two screws are installed in front
decorationstripandthroughthefrontbase.
1) Thefrontstripistobeinstalledaftertherefrigera-
tor is set into the alcove. The strip is shipped as
a loose part.
2) Installthe lower frontstripby sliding it underthe
bottomhingeplateasshowninFIG.5.Thehinge
platecanbeontherightorleftsidedependingon
thedoorswing.
3) Whenthefrontstripisinplace,installonescrew
throughthehingeandintothefloor.Thesecond
FIG.4
FIG. 5

5
screwisinstalled with a washeronthe opposite
side. (See FIG. 5A)
b. Second: Install the two screws in the top
frame.
1) Thetopdecorationpanelmustberemovedfrom
the refrigerator before the screws can be in-
stalled. Open refrigerator door and gently push
thetabsoutoftheholeinthehingewithflatblade
screwdriver. See FIG. 5B.
2) Carefullytiltthetopdecorationpanelandliftupto
remove from top frame. See FIG. 5B.
3) Installthesecondtwoscrewsinthetopframeas
shown in FIG. 5C.
4) Replacethetopdecorationpanel.Becarefulnot
topinchthewires.Makesurethetabssnapback
FIG. 5B
FIG. 5A
into the holes in the hinge plate.
C. Third: Two screws installed as shown in
rear base. See FIG. 5D.
FIG. 5D
Failure to follow the sequence in securing the refrigerator
intheenclosurecancauseleakagebetweentheframeand
cabinet.
Holefor
DrainWater
Hose
FIG. 5C PRESSURE
REGULATOR
LP GAS
CYLINDER
TO
REFRIGERATOR
8.GAS CONNECTION
Hookuptothegassupplylineisaccomplishedatthemanual
gas shutoff valve, which is furnished with a 3/8" SAE (UNF
5/8"–18)maleflareconnection.Abackupwrenchmustbe
used when tightening gas supply fitting. All completed
connections should be checked for leaks with a noncorro-
sive leak detector. (See FIG. 6 – Gas tubing may have a
differentorientationthanshown).
DO NOT USE A FLAME
TOCHECKFOR GAS LEAKS.
Thegas supplysystemmust incorporatea pressureregu-
latortomaintainasupplypressureofnotmorethan13-1/2
inches water column (static) no load.

6
9.TESTING LP GAS SAFETY
SHUTOFF
Thegas safetyshutoffmustbetested afterthe refrigerator
is connected to LP gas supply.
Totestthegassafetyshutoff,proceedasfollows:
A.Start the refrigerator according to the instructions, and
switchtogasmode.See"SectionC.OperationInstruc-
tions."
B.Check that the gas flame is lit.
C.Close the manual shutoff valve at the back of the
refrigerator. (SeeFIG.6)
D.Waitforoneminute.Thecheckindicatorlamp(B)should
nowbelitandthegasmodeindicatorlampshouldbeoff.
E.Remove cover (see FIG. 6) and open the manual gas
valve.Applyanoncorrosivecommercialbubblesolution
to burner jet (see FIG. 6).
FIG.7
Whentestingthegassupplysystematpressureslessthan
orequalto1/2psig,theappliancemustbeisolatedfromthe
gas supply piping by closing its individual manual shutoff
valve.
Incasedetailedinstructionsontheinstallationandconnec-
tion to the gas supply are required, contact your dealer or
distributor.
F.Nobubblesshouldappearattheopeningoftheburnerjet.
Thepresenceofbubblesindicatesadefectivegassafety
shutoff, and service is required.
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
FIG.6
10.120VOLT AC ELECTRICAL
CONNECTION
Therefrigerator isequipped withathree-prong (grounded)
plug for protection against shock hazards, and should be
pluggeddirectlyintoaproperlygroundedthree-prongrecep-
tacle.DONOTcutorremovethegroundingprongfromthis
plug.Thepowercordshouldberoutedtoavoiddirectcontact
withtheburnercover,fluecoverormanualgasshutoffvalve
knob. The free length of the cord is two feet and therefore
recommendedthatthereceptaclebelocatedtotheleftside
oftherefrigerator(viewedfromtherear)andapproximately
six inches from the floor (see FIG. 7). This allows easy
access through the vent door.
switch OFF and back ON. (See "Section C. Operation
Instructions,Item2.ControlPanel").Normaloperationof
theburnershouldreturn.Allowtheburnertooperatefor
a minimum of 5 minutes.
! WARNING
DO NOT USE A FLAME
TO CHECK FOR GAS LEAKS.

7
11. 12 VOLT DC CONNECTION
All refrigerator models require a DC supply to maintain the
automaticenergysystem).TheDCleadconnectionsareat
terminalslocatedattherearoftherefrigerator.(SeeFIG.6).
Oneleadis marked positive(+)and the othernegative(–).
Correct polarity must be observed when connecting to the
DCsupply.
Do not use the chassis or vehicle frame as one of the
conductors.Connecttwowiresattherefrigeratorandroute
to the DC supply.
Thedistancethecurrentmusttravelfromthebatterytothe
refrigerator dictates the AWG wire size to be used. Should
the wire be too small for the distance, a voltage drop will
result.
The voltage drop affects the wattage output of the 12 volt
cartridgeheaterandresultantrefrigeratorperformance.Rec-
ommendedwiresizesareshownbelow.
MAXIMUM TOTAL CONDUCTOR WIRE LENGTH
(In Feet and Meters)
RM4873
AWG 215Watts
10 17 FT.
5M
8 27 FT.
8M
Thewiresfromthebatterytotherefrigeratormustbeoflarge
enough size to handle the load. The connections must be
clean,tightandfreefromcorrosion.Ifnot,aresultingvoltage
dropwillcauseadecreasedcoolingcapacity.TheDCsupply
must be fused. The maximum fuse size is 25 amps.
CleanDirectCurrent(DC)powerismandatoryforhigh-
techcircuitstooperateasdesigned.ThesourcesforDC
powerare a batteryand aconverter.
A battery will provide straight line DC power, but ex-
tended operation will require recharging of the battery
bythe converter or the alternator.
The converter and alternator produces DC power by a
seriesofdiodesthatrectifyalternatingcurrenttoDC.A
battery or capacitors can be used to clean up the AC
ripplethatispresentafterACvoltagehasbeenrectified.
13. CHANGING DOOR SWING TO
OPPOSITE SIDE
Therefrigeratorisequippedwithconvertibledoors.To
changethe doorswing,consulttheparts manualfor
theConversionKitPartNumber.Forfurtherinforma-
tion,pleasecontacttheDometicCorporationlistedon
thefront page.
screws. See FIG. 8.
B. Locate the 2 pins in the end frame of the door. If they
arein thetopframe, relocatethe pinsintothe holesin
the bottom door frame to support the panel. See FIG.
8.
C. Slide panel into grooves on vertical edges of the door
untilitslipsintothegrooveontheoppositeendofdoor.
D. Replace trim strip and screws.
12.INSTRUCTION FOR INSTALLING
DOOR PANEL
Therefrigeratorisnormallydeliveredwithoutthedoorpan-
els.Beforestartingthemountingwork,checkthatthepanel
dimensionsareincompliancewiththosegivenintheTable
onthispageandtheinstructionsarereadthoroughly.When
mounting the panel, proceed as follows. (See FIG. 8)
A. Removethetrimstripfromthedoorbytakingoutthe3
FIG. 8
Refr. Models HEIGHT WIDTH
TYPE MAX. MIN. MAX. MIN.
RM4873
upper mm 403 400 527 524
inch 15-7/8 15-3/4 20-3/4 20-5/8
lower mm 987 984 527 524
inch 38-7/8 38-3/4 20-3/4 20-5/8
PANEL DIMENSIONS
MAX. THICKNESS 5/32" (4 mm)

8
SECTION B. CERTIFIED VENT SYSTEM KITS
REFRIGERATOR KIT
MODEL NO. COMPONENTS PART NO.
RM4873 OPTION #1 ROOF BASE 3103633.XXX *
ROOF COVER 3103634.XXX *
LOWER SIDE VENT 3102277.XXX *
OPTION #3-A POWER VENT ASM. 3104131.002 **
POWER VENTILATOR ROOF BASE 3103633.XXX *
(Island/throughfloor) ROOF COVER 3103634.XXX *
* Fill in "XXX" with color code numbers. For color codes, contact your supplier.
** Alternate instructions forwarded with the Ventilator Kit.
SECTION C. OPERATING INSTRUCTIONS
1.IMPORTANCE OF LEVELING A REFRIGERATOR
Any time the vehicle is parked for several hours with the
refrigerator operating, the vehicle should be leveled to
preventthislossofcooling.Thevehicleneedstobeleveled
only so it is comfortable to live in (no noticeable sloping of
floors or walls).
Whenthevehicleismoving,thelevelingisnotcriticalasthe
rolling and pitching motion of the vehicle will pass to either
sideoflevel,keepingtheliquidammoniafromaccumulating
intheevaporatortubing.
MostLPgasappliancesusedinrecreationalvehiclesareventedtotheoutsideofthevehicle.Whenparked
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.
FORYOUR SAFETY,whenrefueling,shutoffallLP gas applianceswhichareventedtotheoutside.
Inanabsorptionrefrigeratorsystem,ammoniaisliquefiedin
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.
Thetubingintheevaporatorsectionisspecificallyslopedto
provide a continuous movement of liquid ammonia down-
ward by gravity through this section. If the refrigerator is
operated when it is not level and the vehicle is not moving,
liquidammoniawillaccumulateinsectionsoftheevaporator
tubing.Thiswillslowthecirculationofhydrogenandammo-
niagas, orinsevere cases,completely blockit,resultingin
a loss of cooling.

9
2. CONTROL PANEL
3-WAY DISPLAY PANEL
FIG.10
LEGEND 3-WAY MODEL
1. Main Power Button ON/OFF
2. AES/AUTO Mode Selector Button
3. AC\GAS Mode Selector Button
4. GAS Mode Selector Button
5. TEMPERATURE Selector Button
A. AES/AUTO Mode Indicator Lamp
B. AC/GAS Mode Indicator Lamp
C. GAS Mode Indicator Lamp
D. AC Mode Indicator Lamp
E. GAS Mode Indicator Lamp
F. DC Mode Indicator Lamp
G. CHECK Indicator Lamp
(GAS Mode Only)
H. Temperature Indicator Lamps
J. Climate Control Switch
J
3. START-UP INSTRUCTIONS
Beforestartingtherefrigerator,checkthatallthemanualgas
valves are in the ON position. DO NOT forget the manual
shutoff valve on the rear of the refrigerator. See FIG. 6.
This refrigerator is equipped with a control system, which
can automatically select the most suitable energy source
which is available, either AC, DC or LP gas operation. The
system can be set by the user to be fully automatic, or if
desired, LP gas only.
A. A12voltDCsupplymustbeavailablefortheelectronic
controltofunction. Therefrigeratorcontrols willwork
down to 9.6 volts DC.
B. PressthemainpowerON/OFFbutton(1)totheDOWN
position.
C. PresstheTEMPERATURESELECTORBUTTON(5)
until the lamp at the desired setting is illuminated.
1 2 3 4 5
1
23 4
5
A B C D E
H
F
F
G
G

10
A. AES/AUTO MODE
The AES/AUTO mode of operation takes priority over all
other operating modes. If more than one mode selector
button(2),(3)or(4)isinthedownposition,thepriorityisfrom
left to right.
Whenoperatinginthismode,theAES/AUTOmodeindicator
lamp(A) willilluminate.In thismode thecontrolsystemwill
automatically select the energy source with AC having top
priority, DC second priority and GAS third priority. If the
controlsystemhasselectedaparticularenergysourcesuch
asAC,andthenitbecomesunavailable,itwillautomatically
seek out the next available energy source.
PresstheAES/AUTOmodeselectorbutton(2)totheDOWN
position.Indicatorlamp(A)shouldilluminate.Indicatorlamp
(D),(E)or(F)shouldalsoilluminateindicatingwhich energy
source the control has selected.
PresstheTEMPERATURESELECTORbutton(5)untilthe
lamp at the desired position is illuminated.
B. AC/GAS MODE
Press the AC/GAS mode selector button (3) to the DOWN
(ON)position. Modeindicator lamp(B)shouldilluminate.
In this mode of operation the control system will automati-
cally select between the AC and GAS energy sources with
AC having first priority.
TheAES/AUTOmodeselectorbutton(2)mustbeintheUP
(OFF)position.
Indicator lamp (D) or (E) should also illuminate indicating
whichenergysourcethecontrolhasselected.IftheCHECK
indicator lamp (G) illuminates, see GAS MODE for further
instructions.
PresstheTEMPERATURESELECTORbutton(5)untilthe
lamp at the desired position is illuminated.
C. GAS MODE
WhenoperatingintheGASmode,theGASmodeindicator
lamp (C) and (E) will illuminate.
TheGASmodeprovidesLPgasoperationonly.Thecontrol
system will activate the ignition system and will attempt to
lighttheburnerforaperiodofapproximately45seconds.If
unsuccessful,theCHECKindicatorlamp(G)willilluminate
and the GAS mode indicator lamp (C) will turn off.
5.HOW TO USE THE REFRIGERATOR
To restart GAS operation, press the main power ON/OFF
button(1) totheOFF thenON position.Thecontrolsystem
will attempt a new 45 seconds ignition sequence.
TheAES/AUTO(2)andAC/GAS(3)modeselectorbuttons
must be in the UP (OFF) position.
PresstheGASmodeindicatorbutton(4)totheDOWN(ON)
position.
Indicatorlamps(C)and(E)shouldilluminateindicatingGAS
operation.After45secondstheburnershouldbeignitedand
operatingnormally.
Ontheinitialrefrigeratorstart-up,itmaytakelongerthan45
secondstoallowairtobepurgedfromthegasline.Ifthegas
doesnotignitewithin45secondstheCHECKindicatorlamp
(G)willilluminateandtheGASindictorlamp(C)and(E)will
go off.
ToresetwhentheCHECKindicatorlamp(G)isilluminated,
pressthemainpowerON/OFFbutton(1)totheOFFthenON
position.
NOTE:DonotcontinuetoresetGASoperationiftheCHECK
indicatorlampcontinuestobeilluminatedafterseveraltries.
IfrepeatedattemptsfailtostarttheLPgasoperation,check
tomakesurethattheLPgassupplytanksarenotemptyand
allmanualshutoffvalvesinthelinesareopen.Iftheproblem
isstillnotcorrected,contactaservicecenterforassistance.
PresstheTEMPERATURESELECTORbutton(5)untilthe
lamp (H) at the desired position is illuminated.
IfthecontrolisswitchedtotheAES/AUTOorAC/GASmode
ofoperationwhiletheCHECKindicatorlampison,ACorDC
willfunctionproperly,buttheCHECKindicatorlampwillnot
gooffuntilthemainpowerON/OFFbuttonispressedtothe
OFF then ON position.
D.THERMOSTAT
Thethermostatontherefrigeratorcontrolsboththegasand
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"tothedesiredtemperaturesetting,usually
aboutmid-setting.
E. TO SHUT OFF THE REFRIGERATOR
The refrigerator may be shut off while in any mode of
operationbypressingthemainpowerON/OFFbuttontothe
UP (OFF) position. This shuts off all DC power to the
refrigerator.
1 2 3 4 5
1
23 4
5
A B C D E
H
F
F
G
G
3-WAY DISPLAY PANEL

11
4.DESCRIPTION OF OPERATING
MODES
A. AES/AUTO MODE
The AES/AUTO mode of operation takes priority over all
other operating modes. If more than one mode selector
button(2),(3)or(4)isinthedownpositionthepriorityisfrom
left to right.
When operating in the AES/AUTO mode, the AES/AUTO
mode indicator lamp (A) will illuminate. In this mode the
control system will automatically select the energy source
withAChavingtoppriority,DCsecondpriorityandGASthird
priority. If the control system has selected a particular
energysourcesuchasAC,andthenitbecomesunavailable,
it will automatically seek out the next available energy
source.
B. AC/GAS MODE
When operating in the AC/GAS mode, the AC/GAS mode
indicator lamp (B) will illuminate.
In this mode of operation the control system will automati-
cally select between the AC and GAS energy sources with
AC having first priority.
C. GAS MODE
WhenoperatingintheGASmode,theGASmodeindicator
lamp(C) willilluminate.
TheGASmodeprovidesLPgasoperationonly.Thecontrol
system will activate the ignition system and will attempt to
lighttheburnerforaperiodofapproximately45seconds.If
unsuccessful,theCHECKindicatorlamp(G)willilluminate
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 second ignition sequence.
IftherefrigeratorhasnotbeenusedforalongtimeortheLP
tankshavejustbeenrefilled,airmaybetrappedinthesupply
lines.Topurgetheairfromthelinesmayrequireresettingthe
main power ON/OFF button (1) three or four times. If
repeated attempts fail to start the LP gas operation, check
tomakesurethattheLPgassupplytanksarenotemptyand
allmanualshutoffvalvesinthelinesareopen.Iftheproblem
isstillnotcorrected,contactaservicecenterforassistance.
IfthecontrolisswitchedtoAES/AUTOorAC/GASmodeof
operation while the CHECK indicator lamp is on, it will
1 2 3 4 5
1
23 4
5
A B C D E
H
F
F
G
G
3-WAY DISPLAY PANEL
functionproperly,butthe CHECKindicatorlampwillnot go
off until the main power ON/OFF button is pressed to the
OFF then ON position.
D. BATTERY PROTECTION SYSTEM
The control system is equipped with a battery protection
system. If AC power is not available the control will switch
totheDCenergysource.Iftheinputvoltageattheterminal
blockconnectionsisbelow12.8voltsthecontrolsystemwill
bypassthe DCenergysource andattempt GASoperation.
If the GAS energy source is available, CHECK lamp is on,
thecontrolsystemwillreturntotheDCenergysource.The
control will operate in the DC mode for a maximum of 10
minutes.
Iftheinputvoltagehasnotreturnedabove12.8voltswithin
thistime,thecontrolwillterminateDCoperationandturnoff
theDClamp(F)andstartgasoperationifGASenergysource
is available.
Theinput batteryvoltagemust riseabove 12.8volts for 25
minutesbeforeDCoperationcanresume.
As soon as the input voltage rises above the required 12.8
volts, the DC mode lamp (F) will illuminate. However the
controlsystem willremainin the25 minuteDCdelaymode
andoperateongas.Thisdelayistoallowsufficienttimefor
the vehicle charging system to recharge the battery. If 120
volt AC becomes available during the 25 minute delay, the
control will automatically switch to the AC energy source.
E. STANDBY MODE OF OPERATION
Thiscontrolsystemcontainsafeaturewhereitwillcontinue
to operate the cooling system in the event of a failure of a
majoroperatingcomponent.Twodifferentmodesofopera-
tion can occur in this category.
If for some reason the display module becomes nonfunc-
tional, the control system will revert to fully automatic
operation - selecting the best energy source available with
ACandGASpriority.Thetemperatureoftherefrigeratorwill
bemaintainedattheMIDpositionwithinnormaltemperature
tolerances. The power module will continually attempt to
reestablishoperation ofthe displaymodule.
Thesecondstandbymodeofoperationwillexecutewhena
failure of the temperature sensing device or associated

12
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.
A.FOOD STORAGE COMPARTMENT
The food storage compartment is completely closed and
unventilated,whichisnecessarytomaintaintherequiredlow
temperatureforfoodstorage.Consequently,foodshavinga
strong odor or those that absorb odors easily should be
covered. Vegetables, salads, etc. should be covered to
retaintheircrispness.Thecoldestpositionsintherefrigera-
tor are under the cooling fins and at the bottom of the
refrigerator.Thewarmerareasareontheupperdoorshelves.
This should be considered when placing different types of
foodintherefrigerator.
B.FROZEN FOOD STORAGE
COMPARTMENT
Quickfrozensoftfruitsandicecreamshouldbeplacedinthe
coldestpartofthecompartmentwhichisonorjustbelowthe
freezershelf.Frozenvegetables,maybestoredinanypart
of the compartment.
Thiscompartmentisnotdesignedfordeeporquickfreezing
offood.Meatorfish,whetherraworprepared,canbestored
in the frozen food storage compartment provided they are
precooledfirstintherefrigerator.Theycanbestoredabout
three times longer in the frozen food compartment as
compared to the fresh food compartment. To prevent food
fromdryingout,keepitincovereddishes,containers,plastic
bagsor wrappedin aluminumfoil.
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.
Toreleasetheicecubes,seizethetraywithbothhandsand
twistthetray. Cubesnotrequiredshouldbereplaced inthe
tray. Refill the tray with water and replace the tray on the
freezershelf.
Ice will be made more rapidly if the thermostat is set at its
highestposition.Itisagoodideatodothisafewhoursbefore
the anticipated need for ice, but be sure to move the
thermostatbacktonormalsetting,usuallyaboutmid-setting
whentheiceisformed.Foodinthelowercompartmentmay
be frozen if the setting is left on "COLDEST" position.
D. DEFROSTING
ShutofftherefrigeratorbypressingthemainpowerON/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
reducedbyfillingtheicetraywithhotwaterandplacingiton
the freezer shelf. ! CAUTION
DO NOT use a hot air blower. Permanent damage could
resultfromwarpingthemetal orplasticparts.DONOT use
a knife or an ice pick, or other sharp tools to remove frost
fromthefreezershelf.Theycancreatealeakintheammonia
system.
Whenallfrostismelted,drytheinterioroftherefrigeratorwith
a clean cloth. Replace all food and set thermostat to the
COLDESTtemperaturesettingfora fewhours.Thenreset
thethermostattothedesiredsetting,usuallyatmid-setting.
Puttheplasticdraintubeinawatertightbucketorcontainer
(accessthroughlouveredservicepanelontheoutsideofthe
vehicle). As the frost melts, the water will flow into the
container.Whenallthefrosthasmeltedwipeuptheexcess
moistureandemptytheaccumulatedwaterfromthebucket.
Replace the drain tube to its original position.
E.CLEANING
Cleaningtherefrigeratorisusuallydoneafteritisdefrosted
orputintostorage.Tocleantheinteriorlineroftherefrigera-
tor,uselukewarmweaksodasolution.Useonlywarmwater
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
importantto alwayskeepthe refrigeratorclean.
F.SHUT-OFF (STORAGE PROCEDURE)
ShutofftherefrigeratorbypressingthemainpowerON/OFF
button to the UP (OFF) position. (See FIG. 10)
Iftherefrigeratorwillnotbeinoperationforaperiodofweeks,
it should be emptied, defrosted, cleaned and the doors left
ajar.Theice tray shouldalso be driedandkept outside the
cabinet.
! WARNING
DONOTstoreexplosivesubstancesintherefrigerator,
suchasgasolineandotherflammablevaporsorliquids.
G.CLIMATE CONTROL
Duringthesummermonthsofhightemperaturesandhumid-
ity, the metal frame between the freezer and fresh food
compartmentsmayhavewaterdropletsforming.Thenum-

13
ber of water droplets will increase if the vehicle isn't air
conditionedduringthesemonths.
Thisrefrigeratorcomesstandardwitha12volt(DC)climate
controlthatwillevaporatethewaterdropletswhentheyform.
Tohavetheclimatecontrolon,youpositiontheswitch("J",
Figure 10) located beneath the top decorative strip that
housesthecontrolpaneltoON.Theclimatecontrolcanbe
leftoncontinuouslyoronlyusedwhentemperaturesrequire
it.
THE CLIMATE CONTROL WILL DRAW 12 VOLT DC
POWER CONTINUOUSLY WHEN IN THE "ON" POSI-
TION.ITSHOULDBETURNED"OFF"WHENACHARG-
ING SOURCE IS NOT AVAILABLE.
SECTION D. MAINTENANCE & SERVICE
Tips for the Service Technician
Theusershouldbeawareofservicethatmustbedoneonaregularscheduletokeeptherefrigeratoroperatingproperly.
TheserviceshouldonlybeperformedbyaqualifiedtechnicianwhoisfamiliarwithLPgassystemsandrefrigerators.
1. REFRIGERATOR REMOVAL
Beforeworkingontherefrigerator,makesuretheACvoltage
and DC voltage leads are disconnected. Shut off the gas
supply.Disconnectthegassupplyline.Capthegassupply
line, loosen the screws anchoring the refrigerator to the
enclosureandslidetherefrigeratoroutofthecompartment.
Replacement is the reverse of removal. Check all connec-
tions for gas leaks. Refer to Section A, Item 1 to 12 of
Installation Instructions .
2. PERIODIC MAINTENANCE
TokeepyourDometicrefrigeratoroperatingefficientlyand
safely, periodic inspection and cleaning of several compo-
nents once or twice a year is recommended.
A. It is important to keep the area at the back of the
refrigeratorclean.Checkthelowervent,upperventand
areabetweentheseopeningsforanyobstructionssuch
asbird/insectnests,spiderwebs,etc.Cleanthecoilson
the back of the refrigerator. Use a soft bristled brush to
dust off the coils.
Itisimportanttokeeptherefrigeratorventareafreefrom
combustible material, gasoline and other flammable
vapors or liquids.
NOTE:Thefollowingmaintenanceisrequiredonceortwice
a year, but should only be done by a qualified serviceman
who is familiar with LP gas systems and refrigerators.
B. CheckallconnectionsintheLPgassystem(attheback
oftherefrigerator)forgasleaks.TheLPgassupplymust
beturnedon.Applyanoncorrosivebubblesolutiontoall
LP gas connections. The appearance of bubbles indi-
cates a leak and should be repaired immediately by a
QUALIFIED SERVICEMAN WHO IS FAMILIAR WITH
LP GAS SYSTEMS AND REFRIGERATORS.
DO NOT USE A FLAME TO CHECK FOR GAS LEAKS.
C. ChecktheAutomaticSelectcontrolsystembyconnect-
ing/disconnecting 120 volt AC power, start/stop the
engine, etc. Compare the operation with the operation
described in Section C. Operation Instructions .
D. The LP gas pressure should be checked and the main
regulatorreadjustedifpressureisincorrect.Thecorrect
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. 12).
E. Inspectthefluebaffle.Itshouldbereasonablycleanand
free of soot. Heavy soot formation indicates improper
functioningoftheburner.Theflueandburnerbothrequire
cleaninginthefollowingmanner:
1) Unplugtherefrigerator powercord fromthe120volt
AC outlet (see FIG. 6).
2) Disconnect or shut off the 12 volt power to the
refrigerator.
3) TurnmanualshutoffvalvetoOFF.(SeeFIG.6&12).
4) Removecoverfromtheburnerhousing.(SeeFIG.6).
5) Disconnectthewirefromthehighvoltageelectrode.
6) Removetheburnermountingscrewsandremovethe
burnerassembly.
7) Removethe fluecapfrom topofflue tubeandlift out
thewireand spiralbaffle.Cleantheflue fromthetop

14
GAS EQUIPMENT ASSEMBLY
FIG. 12
MANUAL SHUTOFF VALVE
Use a quarter dollar or a slotted screwdriver
to change position
SOLENOID VALVE
BURNER MOUNTING SCREWS THERMOCOUPL
E
BURNER
TUBE
SPARK
ELECTRODE
BURNER
JET
PRESSURE TEST
PORT
INLET FITTING
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) Cleanburnertubewithabrush.Blowoutburnerwith
compressedair.
9) Beforeremovingburnerjet,cleanburnerareaofsoot
andscalethatfelloutoffluetube.Removetheburner
jet. Soak the jet in wood alcohol and blow it out with
compressedair. Reinstalland tightenburnerjet.
DO NOT use a wire or pin when cleaning the burner jet
asdamagecanoccurtotheprecisionopening.Thiscan
causedamagetotherefrigeratororcreateafirehazard.
10) Reinstall burner, being careful that the end of the
burnerfitsintotheslotontheburnerbracket.Check
tomake sureslotsare centeredunder theflue tube
and the thermocouple is positioned properly (tip of
thermocoupleextendsover twoslotsof burner).
11) Be sure to reconnect the wire to high voltage elec-
trode. Check the electrode for proper location and
gap. (See FIG. 13).
ELECTRODE
BURNER T UBE
1/8" TO 3/16"
(3-5 mm)
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 LPgassafetyshutoff.See SectionA.Instal-
lation, Item 9. Testing LP Gas Safety Shutoff .
FIG. 13
F. FUSES
The3-wayElitemodelsareequippedwith3fuses,oneforthe
refrigeratorcontrolsystem,onefortheACcartridgeheater
andathirdfusefortheDCcartridgeheater(seeTablebelow).
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. 6.
3. Snap the fuse out of the fuse holder.
4. Fit a new fuse in to the fuse holder.
5. Replacethepowermodulecover.
ControlSystem 3-amp
ACHeater 5-amp
DCHeater 35-amp

15
3.TROUBLESHOOTING
Refrigerator Does Not Cool Properly
A. Burnerjetclogged.
Clean. See Section D. Maintenance & Service, Item 1.
PeriodicMaintenance,Paragraph E.Item1-14 .
B. Checklevelofrefrigerator.
C. Ventingproblem.
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 setthermostat.
See Section C. Operating Instructions, Item 3.
ParagraphF.
G. Burnerdirty.
Clean. See Section D. Maintenance & Service, Item 1.
PeriodicMaintenance,ParagraphE.8.
H. LP gas pressurelowat burner.
Setmain regulator sopressure does notdrop below 11
inches water column at pressure tap.
I. Burnernotlocatedproperlyunderfluetube.
Relocate.
J. Burnerdamaged.
Replace.
K. Odorsand fumes.
1. Dislocatedburner.
2. Damagedburner
3. Dirty flue tube.
L. FUSES
1) RefrigeratorACsupply
2) RefrigeratorDCsupply
3) RefrigeratorControlSystem
See Section D. Maintenance &Service , Item 2,
ParagraphF.
Contact an authorized service center for parts
and repairs as needed.