Dometic B3351.533 User manual

2
SAFETY INSTRUCTIONS
This manual has safety information and instruc-
tionstohelpuserseliminateorreducetheriskof
accidentsandinjuries.
RECOGNIZE SAFETY INFORMATION
Thisisthesafety-alertsymbol.Whenyouseethis
symbolin this manual,bealert to thepotentialfor
personalinjury.
Follow recommended precautions and safe op-
eratinginstructions.
UNDERSTAND SIGNAL WORDS
Asignalword , WARNING ORCAUTION isused
withthesafety-alertsymbol.They givethelevelof
riskfor potentialinjury.
indicates a potentiallyhazard-
oussituation which, ifnotavoided,could result in
deathor seriousinjury.
indicates a potentially hazard-
ous situation which, if not avoided, may result in
minoror moderateinjury.
used without the safety alert
symbol indicates, a potentially hazardous situa-
tion which, if not avoided, may result in property
damage.
Readandfollow allsafetyinformationandinstruc-
tions.
!
WARNING
!
CAUTION
CAUTION
!
A. Productfeaturesorspecificationsasdescribedorillus-
trated are subject to change without notice.
Thefollowingarethebasicrequirements:
1. Installationopening.Cut throughtheroof andceil-
ing.
2. AdditionalWiring.
220-240 VAC, 50 Hz. 10 Amp.
3. Powerwiththeairconditioneronmustbeabove209
VAC and the frequency must be at 50 HZ. at all
times.
B. ThisAirConditionerIsDesignedFor:
1. InstallationonaCaravanduringthetime the ve-
hicleismanufactured.
2. MountingontheroofofaCaravan.
3. Roofconstructionwithrafters/joistsonminimumof
40.6 cm centers.
4. Minimumof 5cm andmaximumof10cmdistance
betweenrooftoceilingofCaravan.
C. Theabilityoftheairconditionertomaintainthedesired
inside temperature depends on the heat gain of the
Caravan.
Somepreventativemeasurestakenbytheoccupantsof
theCaravancanreducetheheatgainand improvethe
performance of the air conditioner. During extremely
highoutdoortemperatures,theheatgainofthevehicle
may be reduced by:
1. ParkingtheCaravaninashadedarea
2. Usingwindowshades(blindsand/orcurtains)
3. Keeping windows and doors shut or minimizing
usage
4. Avoidingtheuseofheatproducingappliances
Operation on High Fan/Cooling mode will give optimum or
maximum efficiency in high humidity or high outside tem-
peratures.
Startingtheairconditionerearlyinthemorningandgivingit
a "head start" on the expected high outdoor ambient will
greatly improve its ability to maintain the desired indoor
temperature.
Fora morepermanent solutiontohighheatgain, accesso-
rieslikeDometicA&Eoutdoorpatioandwindowawningswill
reduceheatgainbyremovingthedirectsun.Theyalsoadd
aniceareatoenjoycompanyduringthecooloftheevening.
1. GENERAL INFORMATION

5
Roof /Return Air Grill - Cross
Section
Light
35.5 cm
ProhibitsInstallation
Cabinet - Prohibits Use
FIG. 6
d. The roof must be designed to support 60 Kg.
when the Caravan is in motion. Normally a 90
Kg. static load design will meet this require-
ment. See FIG. 7.
C. ROOF PREPARATIONS
The 35.5 cm x 35.5 cm opening is part of the return air
system of the Air Conditioner and must be finished in
accordance with any national or local codes.
1. RoofVentLocations:
a. Remove all screws that secure the vent to the
roofandremovetheventfromtheopening.
b. Removeallsealingcompoundfromaroundthe
ventopening.
c. Seal all screw holes and all roof seams with a
quality all weather sealant. See FIG. 8.
FIG. 7 Force While Moving
Weight of A/C Plus Service Personnel
Seal All
Holes
And
Seams
Scrape
Sealant
Remove Screws
Remove Vent
FIG. 8
There may be electrical wiring between the
roof and the ceiling. Disconnect 220 - 240 volt
AC power cord and the positive (+) 12 volt DC
terminal at the supply battery. Failure to fol-
low this instruction may create a shock haz-
ard causing death or severe personal injury.
WARNING
!
d. Iftheopeningislessthan35cmx35cm,itmust
beenlarged.
e. Iftheopeningexceeds36cmx36cm,itwillbe
necessary to install spacers.
2. NewOpening(installationotherthanventopening)
FIG. 5A
TypeB3351.533&B3351.534
43
cm
1.5 cm
43 cm
87 cm
32.5 cm
75 cm

6
FIG. 12
2 cm 38 cm Min Wire
Length At Front
Of Opening
Frame Opening To Prevent Roof
collapse When Unit Tightened
Down
a. Ifaroofventopeningwillnotbeuseda35.5cm
x35.5cmopeningmustbecutthroughtheroof
andceilingoftheCaravan.Thisopeningmustbe
locatedbetweentheroofreinforcingmembers.
See FIG. 9.
FIG. 9 Do Not Remove
Structure
NoBlockages
Good
DependsOn
Structure
d. Theopeningcreatedmustbeframedtoprovide
adequate support and prevent air from being
drawnfromtheroofcavity.Lumber2cmormore
in thickness must be used. See FIG. 12.
FIG. 11
Cut Hole
Do Not Cut Electrical
Wires
FIG. 10
b. Marka35.5cmx35.5cmsquareontheroofand
carefullycuttheopening.See.FIG.10,11&12.
c. Using the roof opening as a guide, cut the
matching hole in the ceiling.
It is the responsibility of the installer of this
air conditioner system to ensure structural in-
tegrity of the Caravan roof. Never create a low
spot on the roof where water will collect. Wa-
ter standing around the air conditioner may
leak into the interior causing damage to the
product and the Caravan.
CAUTION
Remembertoprovideanentranceholeforpower
supplies,furnacewiring,andcontrolcable.
D. AIR DISTRIBUTION SYSTEM SIZING &
DESIGN
TheInstallerofthisairconditionersystemmustdesign
theairdistributionsystemfortheirparticularapplication.
SeveralrequirementsforthissystemMUST bemetfor
the air conditioner to operate properly. These require-
ments are as follows:
1. Alldischargeairductsmustbeproperlyinsulatedto
preventcondensationfromformingontheirsurfaces
or adjacent surfaces during operation of the air
conditioner.ThisinsulationmustbeR-7minimum.
2. Ducts and their joints must be sealed to prevent
condensation from forming on adjacent surfaces
duringoperationoftheairconditioner.
3. Return air openings must have 260 cm2 minimum
freeareaincludingthefilter.
4. Return air to the air conditioner must be filtered to
preventdirtaccumulationonairconditionercooling
surface.

8
FIG. 16
Screw Locations
HS
HP
+7.5 GND
COOL FUR FAN
FAN
HI
b. Choosethe shortest,direct routefromthe35.5
cm x 35.5 cm opening to the thermostat loca-
tion selected.
c. Considerwherescrews, nailsorstaplesmight
contact the cable.
d. Leaveapproximately10cmofcableextending
through the wall for connection to the thermo-
stat.
e. Leaveapproximately35cmofcableextending
intothe35.5cmx35.5cmopeningforconnec-
tion at unit.
3. AnalogThermostatInstallation.
a. ConnecttheThermostatConnectorCablepro-
trudingfromthewallontothepre-wiredthermo-
stat connector cable.
b. Gentlypushthetwoconnectorstogetheruntila
snapisheardandthelockonthemaleconnec-
tor is latched on the female connector.
c. Gentlyfeedtheconnectorsthroughtheholein
the wall until the thermostat can mount flush.
d. Removethecoverfromthethermostatbystart-
ing at one corner and lifting it off the base.
e. Mountthethermostatlevelonthewallusingthe
screwsprovidedinthelocationsshowninfigure.
16.
F. WIRING REQUIREMENTS
1. Routeacopper1.5mm2,withground,220-240VAC
supplylinefromthetimedelayfuseorcircuitbreaker
boxto theroof opening.
a. This supply line must be located in the front
portion of the 35.5 cm x 35.5 cm opening.
b. ThepowerMUSTbeonaseparate10Amptime
delay fuse or 10 Amp circuit breaker.
c. Make sure that at least 38 cm of supply wire
extendsintotheroofopening.Thisensuresan
easy connection at the junction box.
d. WiringmustcomplywithallNationalandLocal
WiringCodes.
e. Useasteelsleeveandagrommetorequivalent
methodstoprotectthewirewhereitpassesinto
theopening.
2. Routeadedicated12VDCsupplyline(0.50mm2to
0.75 mm2) from the Caravan's converter (filtered
terminals)or batterytotheroofopening.
a. This supply line must be located in the front
portion of the 35.5 cm x 35.5 cm opening.
b. Make sure that at least 38 cm of supply wire
extendsintotheroofopening.
3. Ifafurnaceistobecontrolledbythesystem,thetwo
furnacethermostatleadsmustberoutedtotheroof
opening. Make sure at least 38 cm of the furnace
thermostatwiresextendintothe roofopening.
4. Route thermostat connector cable into the roof
opening.Makesure38cmofcableextendsintothe
roofopening,and10cmextendsfromthewallatthe
thermostat mounting location. See Section G-2.
G. Analog Thermostat & Cable Installation
1. AnalogThermostat Location
Theproper location ofthe thermostat isvery important
toensurethat itwillprovide acomfortableCaravan tem-
perature.Observe thefollowing generalrules whense-
lecting a location:
a. Locate theAnalog Thermostat 140 cm above
thefloor.
b. Install the Analog Thermostat on a partition,
NEVER onan outsidewall.
c. NEVER expose it to direct heat from lamps,
sun or other heat producing items.
d. Avoid locations close to doors that lead out-
side,windows or adjoiningoutside walls.
e. Avoid locations close to supply registers and
theairfrom them.
f. A2.5cm diameterhole willbeneeded toroute
the thermostat connector cable female end
through the wall. See Section F-4.
2. ThermostatConnector CableInstallation.
a. A Thermostat Connector Cable is provided to
connect the air conditioner control box to the
thermostat. The male end of this connector
goes to the thermostat. The female end of the
cable goes to the air conditioner. See FIG. 15.
Female End To Air
Conditioner
FIG. 15
Male End To
Thermostat
5 m Thermostat
Connector Cable
f. Placethecoveronthethermostatandpushuntil
and audible click is heard.

10
f. Starteachmountingboltthroughtheceilingtem-
plate and up into the unit base pan by hand.
Install wood screw (not supplied) in each end
ofthe ceilingtemplate. Thisinsuresatightfitof
the return air cover to ceiling. See FIG. 22.
Tighten mounting bolts to compress gas-
ket to 13 mm this will be a torque of 4.5 -
5.0 Nm. The bolts are self locking so over
tightening is not necessary. See FIG. 22.
2. Installationof DividerPlate
a. Measure the ceiling to roof thickness:
• Ifdistance is5- 9.5cm, removeperforated
tabfrom dividerplate.
• If distance is 9.6 - 14 cm, remove no tabs.
b. Remove the backing paper from double sided
tape located on ceiling template. See FIG. 23.
c. Place divider plate up to bottom of air condi-
tioner base pan firmly. The foam tape on the
divider plate must seal to bottom of base pan.
See FIG. 24.
d. Withslight pressurethenpushthedivider plate
against the double sided tape on the ceiling
template.
Note: The adhesive on the insulation is extremely sticky.
Be sure the part is located where desired before pressing
into place.
e. Locate the 18 cm x 45.5 cm self -adhesive in-
sulationsuppliedwith thereturnairkit. Remove
thebackingpaper fromtheinsulation andcare-
fullystickontotheceilingtemplatedividerpanel.
See FIG. 25.
FIG. 23
5 - 9.5 cm
Improper installation and sealing of divider
platewillcausethecompressortoquickcycle
onthe coldcontrol. Thismay resultin fuseor
circuit breaker opening and/or lack of cool-
ing.
CAUTION
FIG. 24
FIG. 25
FIG. 22
Finger
Tight
Front of Vehicle
Tighten to
compressgasket
to 13 mm or 4.5 -
5.0 NM
Roof
Gasket
Wood
Screws
•Excess width is intended to seal the di-
vider plate to the sides of the 35.5 cm x
35.5 cm opening. This is to help prevent
coldair discharge fromcirculating into the
airconditioner returnair opening.
•If the insulation is too high, stick excess
height of insulation to the air conditioner
basepan. Donotcover upunitrating plate.
f. Placetheanalogcontrolboxontheceilingtem-
platewith thewhite6pinconnector plugon the
side as shown in FIG. 26.