Dometic RM2332 User manual

1
TILT SIDE-TO-SIDE
®
Refrigerator
Bulletin R74/6D
March 2002
PROCEDURE FOR
CHANGING COOLING UNIT
IN CARAVAN 95 AND NDR
REFRIGERATORS
The following categories have been established predicated on similarity of design and procedure for
replacement of cooling units:
A - CATEGORY #1
RM2193 RM2332 RM2333
RM2452 RM2453 RM2551
RM2552 RM2553 RM2554
RM4223 RM4290 RM4292
C - CATEGORY #3
RM1272 NDR1282
RM1282 NDR1292
NDR1272 NDR1492
B - CATEGORY #2
RM2620 RM2652 RM2820
RM2852 RM3662 RM3663
RM3862 RM3863 NDR1062
These instructions must be read and under-
stoodbeforeinstallationofthiskit.Thiskitmust
be installed by a Dometic service center or a
qualifiedservicetechnician.Modificationofthis
product can be extremely hazardous and could
result in personal injury or property damage.
GENERAL INSTRUCTIONS TO ALL MODELS
1. Disconnect shore power from coach, the positive lead
from battery, and turn propane OFF at the tank.
2. Throughlowervent,unplugrefrigerator120VACcord(s)
from wall receptacle. Disconnect 12V DC wires from
terminal block on the refrigerator (if models have 12V
DC).Tapeorcapends.
3. CheckagaintomakesurepropaneisOFFattank,then
removecoachgaslinefromgascockonrefrigeratorand
cap coach gas line.
4. For Models with Ice Maker: Turn water OFF to
appliance. Disconnect coach’s water line from water
solenoid(capend).
5. Removetherefrigeratorfromalcove.
A. Category #1:
RM2193 RM2332 RM2333 RM4223
RM2452 RM2453 RM2551 RM4290
RM2552 RM2553 RM2554 RM4292
STEP 1. REMOVAL OF COOLING UNIT
1. SeeGeneralInstructions on all models.
2. Loosenscrewsholdingthethermostatbulbtofins.See
FIG. A1.
Note: Some models have a plastic thermistor bracket
clipped to the fin.
3. Removethescrewsfromthebackwallofthefreezerand
the fins.
Note:OnmodelsRM2452,RM2453,RM2551,RM2552,
RM2553andRM2554,thefinsareinstalledonthecooling
unit before it is put in the cabinet. The cooling unit must be
outofthe cabinet before thefinscanberemoved.
4. On all other models remove the fins. See FIG. A1.
5. Lay the refrigerator face down on two 2x4’s to avoid
damagingtherefrigeratorfront.
6. Removecoverfromboilerandheatingelement(s).
7. Removeburnercoverandthentheburnerassembly.
Note: Some models have a bracket that holds the manual
gascockand/ortheelectricsolenoidvalve.Removethe
screws from these brackets and save to be reinstalled.
8. Cut the wire ties along the left side. Remove the
thermostat sensor tube (if required) and position the
burnerassemblyandwiressotheywillnotbedamaged
by pulling the cooling unit.
Important: After the cooling unit has been installed,
the initial start-up time can be shortened by tilting the
refrigerator from side-to-side and then from front-to-
back before the refrigerator is turned on. Hold in each
tilt position for approximately 30 seconds to settle
solution to bottom of cooling unit.
TILT FRONT-TO-BACK
Runtherefrigeratoronabenchfor12hoursafterthecooling
unithasbeeninstalled.Therefrigeratorshouldnothavefood
in it during this test.
REVISION
FormNo.3107154.035 3/02
(Replaces3107154.027)
©2002DometicCorporation
LaGrange,IN46761

2
STEP 2. INSTALLATION OF COOLING
UNIT
1. Inspectcooling unit for brokenweldsorbentframe.
2. Trimthefoam block portion of cooling unit if it does not
go freely into the refrigerator. Be sure foam does not
covertheevaporatortubeswherecoolingfinsattach.
3. Apply thermomastic on evaporator tubes 1/4” to 3/8”
bead. Apply more if the tubes are recessed in foam
block. (FIG. A3)
4. Apply permagum and double-stick tape to cabinet as
shown in FIG. A4.
5. If foam block fits loosely into cabinet (1/4” or more of
movement) use 1/2” wide x 3/8” thick closed cell, one-
sided adhesive weather stripping. Place in the same
locationaspermagum.Alsoapplydouble-sticktapeas
shown in FIG. A4.
6. Installcoolingunitbackinthecabinet.Replacescrews
holding cooling unit to cabinet. Replace components
removedinStep1,587. (FIG. A2)
7. Stand refrigerator upright. Transfer flue baffle to new
coolingunit.ReplacetheinsidepartsremovedinStep1,
2–4.(See“Important”onPage1).
8. Installrefrigeratorbackintocoachandleakcheckallgas
fittings. Repair all gas leaks.
Do not use a flame
to check for gas leaks.
FIG. A1
FIG. A2
FIG. A3
FIG. A4

3
B. Category #2
RM2620 RM2652 RM2820 RM2852
*RM3662 *RM3663 *RM3862 *RM3863
*NDR1062 * Optional Ice Maker Cycle
STEP 1. REMOVAL OF COOLING UNIT
1. SeeGeneralInstructionsforallmodels.
2. Removethermistorbracketand4screwsfromfins(FIG.
B1).DONOTremovefins.Theyaretapedtotherearofthe
cabinetliner.
3. Inthefreezer,removeshelvesandgrillcoveringscrews.
Pull out center of grill to allow right or left side to pop out
of slot (FIG. B1).
4. Modelswith IceMaker:Removethecoverofcycleand
the 2 screws holding cycle to the side wall (FIG. B2).
5. Remove4screwsholdingcyclebracket.Becarefulnotto
drop.Unplug electrical connection andtake cycle out of
freezer.Removetheremainingscrews.(FIG.B2)
6. Laytherefrigeratorfacedownontwo2x4’stoprotectthe
faceoftheappliance.
7. Removeheatercoverandheater(s)(FIG.B3&B4).Also
disconnecticewireharnessleadsfromelectricalconnec-
tionsontherefrigerator.
Note: NDRmodels-pullwireharnessoutofthecoolingunit
fromtheinsideoffreezer.Pullwaterfilltubefromrearof
refrigerator.Disconnectwaterlinefromwatersolenoidvalve.
8. Removeburnercover(1screw)andscrewholdingthe
burnertofluetube.Pullburnerdownandofftube(FIG.B4).
9. Remove2screwsholdingcontrolpaneltorunnerand2
screwsholdinggassolenoidvalvetocoolingunit(FIG.B4).
10. Takeoutscrews(1oneachside)whererunnerfastensto
therearofcabinet.Swingrunnersouttothesidetoclear
cabinet(FIG.B3).
11. Cutwiretiesholdingcablesand thermistor toframeof
cooling unit.
12. Disconnectclimatecontrolandinterior(redwires)fromJ2
oncircuitboardandblackwiresfromground.
13. Cutredandblackwiresfrominteriorlight.Stripback3/8”
toreconnect usingbuttconnectorsafter coolingunithas
beeninstalled.
14. Remove4screwsholdingcoolingunittocabinet(2ontop
and2onbottom).(FIG.B3).Liftcoolingunitoutofcabinet.
STEP 2. INSTALLATION OF COOLING UNIT
1. Refer to Step 2, Category A, 1–5.
2. Installcoolingunitbackincabinet.Replacescrewholding
unit.
3. ReplacethecomponentsremovedinStep1,2-14.
4. Standrefrigeratorupright.Transferthefluebaffletonew
coolingunit.ReplaceinsidepartsremovedinStep1,2–5.
5. Checkforpropercoolingbeforeinstallingrefrigeratorback
intothe coach. (See “Important” on Page 1).
6. Installrefrigeratorbackintocoachandleakcheckallgas
fittings. Repair all gas leaks.
Do not use a flame
to check for gas leaks.
FIG. B1
FIG. B2
FIG. B3
FIG. B4

4
STEP 3. PREPARING THE COOLING UNIT
FORTHEICEMAKER(Foronlymod-
elswith icemaker)
Note: Modelsthathavethewaterfillfortheicemakerentering
through the top do no require drilling of cooling unit
(RM3652,RM3653,RM3862,andRM3863).Thecool-
ingunithasbeeninstalledintherefrigerator,proceedto
number2.
1. Beforetheshelvesandotherinteriorpartsareplacedinto
thecabinet,theopeningfortheicemakerwaterlinesand
powercordsmustbemadethroughthefoamblockofthe
coolingunit. Lookatthedefectivecoolingunittodetermine
theapproximatelocationandangletodrilltheholeinthe
newcoolingunit. Thetwoholesaredrilledfromtheinterior
ofthecabinetoutthroughtherearoftherefrigerator. Use
a1/2”and3/4”by8”longdrillbittomakethetwoholes. Be
carefulnottodrillintoanyrefrigerantlines,causingaleak.
See FIG. B5.
2. Thewireharnessisroutedfromtheinsideofthefreezer
compartmentthroughthe1/2”hole. Pullthewireharness
throughthebackwallofthefreezercompartment. Leave
sufficientlengthofwires(approx.8”)to connect to the
cycle. Followthesamepaththatwasusedbeforebythe
wireharnessandreconnectittothesolenoidandpower
cord.
3. Routethewaterlinefromthewatersolenoiduptherearof
therefrigerator. Insertthefilltubefromtherearthroughthe
3/4”hole. Usepermagumtomakeanairtightsealaround
the wire harness and water fill tube. If water line is not
attachedtothefilltubeitshouldbeconnectednow. Make
surethatthesameroutingisfollowedbetweenthewater
solenoid and fill tube. If the water line has heat tape, be
sureitisinplace. Usealuminumfoiltapetocoverandseal
thewaterlineandwireharnesstothebackofthecabinet.
See FIG. B6.
4. Spread a thin layer of thermomastic onice maker shelf.
SeeFIG.B7.Plugthewireharnesstotheicecycle. Install
thecycleusingthescrewsremoved. Makesuretheend
ofthewaterfilltubewillallowwatertoenterthecycleinlet,
and is free from touching the sides or bottom. This will
allowthewatertodraincompletelyoutofthefilltubeand
preventfreezing.
5. Return to Step 2 (Installation of cooling unit), #3 of this
section.
FIG. B5
FIG. B6
SPREAD A THIN
LAYER OF
THERMOMASTIC
ON ICE MAKER SHELF
SPREAD A THIN
LAYER OF
THERMOMASTIC
ON ICE MAKER SHELF
FIG. B7

5
C. Category #3
NDR1272 **NDR1282 NDR1292
NDR1492 RM1272 **RM1282
** (Ice Maker Cycle/Compressor Operated)
STEP 1. REMOVAL OF COOLING UNIT
1. SeeGeneral Instructionsforallmodels.
2. Removethe twotopshelvesanddrip tray. Disconnect
interiorlightfromsideofrefrigerator.Removethermistor
withbracketfromfins(FIG.C1).
3. Remove cooling fins - right side first (6 screws). Pull
outdraincupandremovetube(FIG.C1).
4. Models with Ice Maker: Remove cycle from shelf
plate (3 screws) (FIG. C2). Lift cycle off shelf. Unplug
the cable and move out of cabinet until you are ready
to reinstall. Disconnect the electrical cable from back
ofrefrigeratorandpulloutfrominside.
5. All Models: Follow Steps 5 – 11.
6. Removefreezerplates(FIG.C3).
A.Twoscrewswithnuts(hexagon)
B.Twoscrews(side)
C.Twoscrews(top)
D.Twoscrews(side)
7. Afterfreezerplates are re moved,take out 4 screws
holding the cooling unit to circulation tube (FIG. C3).
Removeplasticcoverplate onthebackoffreezer.
8. Layrefrigeratorfacedownontwo2x4’stoprotect
handlesandframefromdamage.
9. Removalofcontrolsatrearofrefrigerator(FIG.C4).
A.Twoscrews(plateprotections)
B.Twoscrews(mountingplatecircuitboard
-(notshown)
C.Threescrews(gasvalvebracket)
D.Threescrews(burnerassembly-
notshown)
10. Removeheatercover,heaters(2)andany
otherpartsthatinterferewiththeremoval
ofcoolingunit.
Note: Before cooling unit is placed in the
refrigeratorcabinet,checkthetappedscrew
holes. See FIG C3 #6. Paint can fill the
holesandmakereplacement of screws
impossible. See FIG. C4.
11. Removescrewsholding cooling unittothe
cabinet(5).
12. Applyleverageas shown andpullout(FIG. C4).
13. Removethegroundwire(white)frombottomofold
cooling unit and place on new one.
FIG. C3
FIG. C1
FIG. C4
FIG. C2
STEP 2. INSTALLATIONOFCOOLINGUNIT
1. Refer to section A Category #1, Step 2, 1–5.
2. Place cooling unit in cabinet and replace screws.
3. ReplacecomponentsremovedinStep1,9–11,FIG.
C4.
4. Standrefrigeratorupright.Transferfluebaffletothe
newcoolingunit.Replace insidepartsremovedin
Step 1, 2–4.
5. Checkforpropercoolingbeforeinstallingrefrigerator
back into coach. (See “Important” on Page 1).
6. Install refrigerator back into coach and leak check all
gas fittings. Repair all gas leaks.
Do not use a flame
to check for gas leaks.

6
STEP 3. PREPARING THE COOLING UNIT
FOR THE ICE MAKER (Models with
ice makers)
1. Modelswithcompressorassisticemaking,requirea
groovetobecutinthefoamblocktoallowapathforthe
refrigerantlineandwireharness. Thisgrooveneedsto
bepresentbeforethe cooling unit can be fitted intothe
cabinet. Models without the compressor should pro-
ceed to number 6.
2. Thecoolingunitframeismanufacturedwithanotchcut
intoit. Thisnotchiswheretherefrigerantlineandwire
harness will pass through once the foam block is cut
away. Useahacksawandmakethegrooveontheright
handsideofthefoamblock. Thegrooveshouldbethe
same dimensions as the notch in the frame. See FIG.
C5 & C7.
3. The cooling unit can be installed into the refrigerator.
See Section A, Category #1, Step 2, 1-5.
4. Beforetheshelvesandotherinteriorpartsareplacedinto
thecabinet,theopeningfortheicemakerwaterlinemust
bemadethroughthefoamblockofthecoolingunit. Look
at the defective cooling unit to determine the approxi-
mate location and angel to drill the hole in the new
cooling unit. The hole is drilled from the interior of the
cabinetoutthroughtherearoftherefrigerator. Usea3/
4” by 8” long drill bit to make the hole. Be careful no to
drillintoanyrefrigerant lines,causingaleak. SeeFIG.
C6.
5. Proceedto number8.
6. Models without compressor, the cooling unit can be
installed into the refrigerator. Before the shelves and
other interior parts are placed into the cabinet, the
openingfor the ice maker water lines andpower cords
mustbemadethroughthefoamblockofthecoolingunit.
Look at the defective cooling unit to determine the
approximatelocationandangeltodrilltheholeinthenew
coolingunit. Thetwoholesaredrilledfromtheinteriorof
thecabinetoutthroughtherearoftherefrigerator. Use
a1/2”and3/4”by8”longdrillbittomakethetwoholes.
Becarefulnottodrillintoantrefrigerantlines,causinga
leak. See FIG. C6.
7. Thewireharnessisroutedfromtheinsideofthefreezer
compartment through the 1/2” hole. Pull the wire
harness through the back wall of the freezer compart-
ment. Leave sufficient length of wires (about 8”) to
connect to the cycle. Follow the same path that was
usedbeforebythewireharnessandreconnectittothe
solenoidandpowercord.
8. Routethewaterlinefromthewatersolenoiduptherear
oftherefrigerator. Insertthefilltubefromtherearthrough
the3/4” hole. Use permagumto make an air tight seal
aroundthewireharnessandwaterfilltube. Sealboththe
outsideandinside. Ifthewaterlineisnotattachedtothe
filltubeitshouldbeconnectednow. Makesurethatthe
sameroutingisfollowedbetweenthewatersolenoidand
fill tube. If the water line has heat tape, be sure it is in
place. Usealuminumfoiltapetocoverandsealthewater
line and wire harness to the back of the cabinet. See
FIG.C7.
9. Spread a thin layer of thermomastic on top of the ice
makershelf. SeeFIG.C8.Plug thewireharnessto the
ice cycle. Install the cycle using the screws removed.
Makesure the end of thewater fill tube will allowwater
to enter the cycle inlet, and is free from touching the
sides or bottom. This will allow the water to drain
completelyout ofthefilltube andpreventfreezing.
10. Return to Section C, Category #3, Step 2, #3.
FIG. C5
FIG. C6
FIG. C7
FIG. C8
APPLY
THERMO
MASTIC
TO TOP
APPLY
THERMO
MASTIC
TO TOP

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