Dometic 3253.331 Installation & Operating Instructions Manual Download Page 8

29

B. Cooling Operation

1.

Set the thermostat at the desired temperature level.

2.

Select the fan speed that best satisfies your needs:
a.

HIGH COOL:  Selected when maximum cooling

and dehumidification required. (3 

)

b.

MED COOL: Selected when normal or average

cooling required. (2 

)

c.

LOW COOL:  Selected when room at desired
comfort level and needs to be maintained.
Normally this speed used for night time opera-

tion. (1 

)

Important:

 When the air conditioner is turned on and

the thermostat calls for cooling, the fan and compressor
start at the same time. After shutting the air conditioner
down manually by either the selector switch or the
thermostat, always wait 2-3 minutes before turning on
the air conditioner. This allows the refrigerant pressures
in the air conditioner system to equalize so the compres-
sor may restart.

Note: The blower runs continuously to circulate  air and
maintain an even temperature.  The compressor will come on
as cooling is required to maintain the selected temperature
level.

C. Fan Operation

1.

This will circulate the air in your Caravan without
cooling or heating. There are three positions: HIGH
FAN (3  ), MED FAN (2  )
 or LOW FAN (1  ) to
select from, depending upon personal choice. See
FIG.15.

D. Heating Operation 

(If so equipped)

Note: This electric heater will not replace a furnace for
heating your Caravan in cold weather. The intent is to remove
the chill on cool days or mornings.

1.

Turn the selector switch to "OPT HEAT" (

).

See FIG. 15.

2.

The Heater will come on and begin heating.

3.

When desired temperature level in Caravan is
reached, move the selector switch to "OFF" or
"FAN" position.

Note: Thermostat does not control heater ON/OFF cycle. If
the optional heater is not installed and selected, the fan will
run as "LOW FAN" operation.

E. "OFF" Position

1. This is to turn Unit off.

F. Customer Maintenance

1. Periodically remove the return air filters located

above the removable panels in the air box. Wash the
filters with soap and warm water, let dry and then
reinstall.

Note: Never run the air conditioner without return air filter in
place. This may plug the unit evaporator coil with dirt and
may substantially affect the performance of the unit.

2.

Clean air box housing and control panel with a soft
cloth dampened with a mild detergent. Never use
furniture polish or scouring powders.

3.

The blower motor is factory lubricated and requires
no service under normal use.

4.

Under certain conditions, frost may form on the
evaporator coil.  If this should occur, inspect the
filter and clean if dirty. Make sure air louvers are not
obstructed. Air conditioners have a greater ten-
dency to frost when the outside temperature is
relatively low. This may be prevented by adjusting
the thermostat control knob to a warmer setting
(counter clockwise). Should frosting continue, oper-
ate on LOW, MED, or HIGH FAN only setting  until
the cooling coil is free of frost.

5.

If your unit fails to operate or operated improperly,
check the following before calling your service
center.
a.

If Caravan connected to motor generator, check
to be sure motor generator is running and
producing power.

b.

If Caravan connected to power supply by a land
line, check to be sure line is sized properly to
run air conditioner load and it is plugged into
power supply.

c.

Check your fuse or circuit breaker to see if it is
open.

d.

After the above checks, call your local service
center for further help. This unit must be ser-
viced by qualified service personnel only.

6. If any wiring or supply cord is damaged and

needs to be replaced, it must be replaced by the
manufacturer or its service agent or a similarly
qualified person.

7. When calling for service, always give the following:

a.

Air Conditioner Model and Serial Number found
on rating plate located on base pan of air
conditioner bottom.

b.

Air Distribution Box Kit Part and Serial Number
found on rating plate located on ceiling tem-
plate. Observe this rating plate through the air
box filter grill opening.

Summary of Contents for 3253.331

Page 1: ...tion of this product can be extremely haz ardous and could result in personal injury or property damage Roof Top Air Conditioner CARAVAN MODEL B3200 TYPE 3253 331 Model B3200 SERVICE OFFICE DometicCorporation ForInformation Contact www dometic com Form No 3310147 000 Danish Dutch English Finnish French German Greek Italian Norwegian Portuguese Spanish Swedish 2005 5 05 Dometic GmbH D 57074 Siegen ...

Page 2: ...ow for roofs more than 100mm thick C The ability of the air conditioner to maintain the desired inside temperature depends on the heat gain of the Caravan Somepreventativemeasurestakenbytheoccupantsof the Caravan can reduce the heat gain and improve the performance of the air conditioner During extremely highoutdoortemperatures theheatgainoftheCaravan may be reduced by 1 Parking the Caravan in a s...

Page 3: ...331 NominalCompressor Capacity KW 3 2 1 5 ElectricalRating 220 240 VAC 50Hz 1 Ph Full Load Amps Compressor Motor 5 2 0 8 6 0 0 8 LockedRotorAmps Comp Motor 24 5 0 6 0 5 0 CircuitProtection 10 Amp Time Delay Fuse or Circuit Breaker Input Power KW 1 35 1 64 Minimum Wire Size Up to 8 meters use 1mm2 Copper Generator Size 1 Unit 3 5KW 2 Units 5 0KW Improper installation may damage equipment could enda...

Page 4: ...rew holes and seams where the roof gasket is located Use a good grade of all weather sealant See FIG 6 9 1 2 39 28 3 4 20 2 1 2 22 FIG 4 24cm 102cm 74cm 51cm 6 4cm 56cm 510mm 283 mm 105 mm 105 mm 283 mm 75mm 75mm Center Line Of Opening Air Box Perimeter Keep This Area Free From Obstructions 105mm 181mm 181mm 362mmx 362mm 3 2mm Opening 543mm Center Line Of Unit 305mm 102mm 102mm Rear Of Unit 362mm ...

Page 5: ...ct Water standing around the air conditioner may leak into the interior causing damage to the product and the Caravan CAUTION D Wiring Requirements 1 220 240 VAC Supply Line Route a copper 1mm2 with ground 220 240 VAC supply line from the time delay fuse or circuit breaker box to the roof opening a This supply line must be located in the front portion of the 362mm x 362mm 3 2mm opening b ThepowerM...

Page 6: ...unit as necessary Roof Gasket centers over 362mm x 362mm 3 2mm 3 Removeupperductfromceilingtemplateandlocate it over blower discharge See FIG 10 Note EdgewithoutflangeinstallstowardREARofopening 4 Use two 2 sharp pointed 10 sheet metal screws to hold duct to base pan Screw holes are provided in bottom of base pan for these screws 5 Reachupintoreturnairopeningoftheairconditioner and pull the unit s...

Page 7: ... kit 4 Carefullypushallexcesswirebackintothejunction box and install cover onto the box with two blunt screwsprovided 5 Plug the electrical conduit from the upper unit into the mating switch box connector See FIG 13 6 Wrap wire tie around plug connector s to prevent removal in field service FIG 13 Route Power Supply Through Romex Connector Plug Conduit Into Switch Box And SecureWithWire TieTo Prev...

Page 8: ...panelsintheairbox Washthe filters with soap and warm water let dry and then reinstall Note Never run the air conditioner without return air filter in place This may plug the unit evaporator coil with dirt and may substantially affect the performance of the unit 2 Clean air box housing and control panel with a soft cloth dampened with a mild detergent Never use furniture polish or scouring powders ...

Page 9: ...30 RoofMountAssembly Rear AirConditioner UpperDischarge Duct CeilingTemplate MountingBolts Air Box RoofOpening FIG 17 ...

Page 10: ...H C L1 4 2 1 MOTOR 2 HEAT ACCESSORY HEAT ACCESSORY BLK BLK BLK ELEMENT LIMIT SWITCH 3 1 WHT LIMIT SWITCH BOX JUNCTION JUNCTION LINE SPLICE LINE SPLICE FIELD WIRING FIELD WIRING FACTORY WIRING TSTAT TSTAT USE COPPER CONDUCTORS ONLY USE COPPER CONDUCTORS ONLY 220 240 VAC 50 HZ 10 220 240 VAC 50 HZ 10 3105580 025 FAN CAP FAN CAP ID ID BLK YEL RED BLU WHT WHT GR YL BLK YEL RED BLU WHT WHT GR YL BRN BR...

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