Dometic Type 3241CX51R(CALR241), Type 3242CX51R(CALR242), 3241CX51R, CALR241, 3242CX51R Installation & Operating Instructions Manual

Supplied by Dometic
Australia contact

www.dometic.com.au

RECORD THIS UNIT INFORMATION
FOR FUTURE REFERENCE:
Type Number
Product Number
Serial Number
ADB Number
ADB Serial Number
Date Purchased

Roof Top Unit

Description Model Type Use With Air Distribution Box

Model

Air Conditioner
W/Electric Heat

Heat Pump

Note: Air Distribution Box installation requires a #2 Phillips screwdriver
with a 7 mm maximum diameter x 35 mm minimum length.

B3200
B3200

3241CX51R

3242CX51R

3311669.018CY2

3311669.018CY1

This manual must be read and
understood before installation,
adjustment, service, or mainte­nance is performed. This unit must

be installed by a qualied service

technician. Modification of this
product can be extremely hazard­ous and could result in personal
injury or property damage.

INSTALLATION & OPERATING

INSTRUCTIONS

Type

3241CX51R(CALR241)
3242CX51R(CALR242)

REVISION

Form No. 54-AA-MA3200CY1

MOBICOOL Electronic(Zhuhai)Co., Ltd

18, Jinhu Lu, Sanzao, Jinwan Zhuhai, China

Important:

stay with unit. Owner read carefully.

These Instructions must

SAFETY INSTRUCTIONS

This manual has safety information and instruc­tions to help users eliminate or reduce the risk
of accidents and injuries.

RECOGNIZE SAFETY INFORMATION

This is the safety-alert symbol. When you see this
symbol in this manual, be alert to the potential
for personal injury.

Follow recommended precautions and safe op­erating instructions.

UNDERSTAND SIGNAL WORDS

A signal word , WARNING OR CAUTION is used
with the safety-alert symbol. They give the level
of risk for potential injury.

ous situation which, if not avoided, could result
in death or serious injury.

ous situation which, if not avoided, may result in
minor or moderate injury.

symbol indicates, a potentially hazardous situa­tion which, if not avoided, may result in property
damage.

Read and follow all safety information and in­structions.

indicates a potentially hazard-

indicates a potentially hazard-

used without the safety alert

GENERAL INFORMATION

Product features or specications as described or il-

A.

lustrated are subject to change without notice.
This Air Conditioner/Heat Pump (hereinafter referred

B.

to as the "unit" Is Designed For:

1. Installation on a Caravan or Motor Home during or
after the time the vehicle is manufactured.

2. Mounting on the roof of a Caravan or Motor Home.

3. Roof construction with rafters/joists support frames
on minimum of 406 mm centers.

4. Minimum of 25 mm and maximum of 140 mm
distance between roof to ceiling of Caravan.

C. Basic Requirements

1. Installation opening. Cut through the roof and ceil­ing.

2. 220-240 VAC, 50 Hz. 10 Amp.

3. Power when the unit starts must be above 198 VAC
and the frequency must be 50 Hz at all times.

D. The ability of the air conditioner to maintain the de-

sired inside temperature depends on the heat gain of
the Vehicle.

Some preventative measures taken by the occupants

of the Vehicle can reduce the heat gain and improve
the ability of the air conditioner to cool the Caravan.
During extremely high outdoor temperatures, the heat
gain of the Vehicle may be reduced by:

1. Parking the Vehicle in a shaded area

2. Using window shades (blinds and/or curtains)

3. Keeping windows and doors shut or minimizing
usage

4. Avoiding the use of heat producing appliances

Operation on High Fan/Cooling mode will give optimum

or maximum efciency in high humidity or high outside

temperatures.

Starting the air conditioner early in the morning and

giving it a "head start" on the expected high outdoor
ambient will greatly improve its ability to maintain the
desired indoor temperature.

For a more permanent solution to high heat gain, ac-

cessories like an outdoor patio and window awning will
reduce heat gain by removing the direct sun. They also
add a nice area to enjoy company during the cool of
the evening.

E. Condensation

Note: The manufacturer of this unit will not be responsible

for damage caused by condensed moisture on ceilings or
other surfaces. Air contains moisture and this moisture
tends to condense on cold surfaces. When air enters the
Vehicle, condensed moisture may appear on the ceiling,
windows, metal parts, etc. The air conditioner removes
this moisture from the air during normal operation. Keep­ing doors and windows closed when this air conditioner
is in operation will minimize condensed moisture on cold
surfaces.

2

Specications

Type

A/C OR H/P A/C H/P

Nominal Cooling
Capacity (KW)

Electric Heat
Capacity (KW)

Heat Pump
Heating Capacity

Electrical Rating 220 - 240 VAC 50 Hz., 1 Ph

Full Load Amps
(Compressor / Motor)

Locked Rotor Amps
(Comp / Motor)

Power (KW)
Compressor + Motor

Power (KW)
Heater

Minimum Wire Size Up to 8 meters use 1.5 mm

Circuit Protection 10 Amp Time Delay Fuse,

* Generator Size 1 Unit - 3.5 KW

* The manufacturer gives GENERAL guidelines for genera-
tor requirements. These guidelines come from experiences
people have had in actual applications. When sizing the
generator, the total power usage of your Caravan must be
considered. Keep in mind generators lose power at high
altitudes and from lack of maintenance.

3241CX51R

3.2 3.2

1.6

N/A

5.46 / .92 5.46 / .92

27 / 2.3 27 / 2.3

1.33 1.34

N/A

Consult Regulatory Codes.

or Circuit Breaker

2 Unit - 5.0 KW

3242CX51R

N/A

3.2

1.5

2

, Copper.

B. Choosing Proper Location For The Unit

This unit is specically designed for installation on the roof

of a Caravan. When determining your cooling requirements,
the following should be considered:

• Size of Caravan or Motor Home;

• Window area (increases heat gain);

• Amount of insulation in walls and roof;

• Geographical location where the Caravan or Motor

Home will be used;

• Personal comfort level required.

1. Normal location-The unit is designed to t over an

existing roof vent opening.

2. Other locations - When no roof vent is available or
another location is desired, the following is recom­mended:

a. For one unit installation: The unit should be

mounted slightly forward of center (front to
back) and centered from side to side.

b. For two unit installations: Install one unit 1/3

and one unit 2/3’s from front of Caravan or
Motor Home and centered from side to side.

FIG. 1

1/2L

L

2/3L

L

1/3L

INSTALLATION INSTRUCTIONS

A. Precautions

Improper installation may damage equipment,
could endanger life, cause serious injury and/
or property damage.

1. Read Installation and Operating Instructions care­fully before attempting to start this unit installa­tion.

2. The manufacturer will not be liable for any dam­ages or injury incurred due to failure in following
these instructions.

3. The equipment shall be installed in accordance
with national wiring regulation per IEC 335-2-40, CI,

7.12.1. Installation must comply with all applicable
codes and/or regulations.

4. DO NOT add any devices or accessories to this

unit except those specically authorized in writing

by Dometic Mobicool.

5. This equipment must be serviced by qualied

personnel and some localities require these people
to be licensed.

It is preferred that the unit be installed on a relatively at
and level roof section measured with the Vehicle parked
on a level surface, but up to a 8° tilt is acceptable.

3. After location has been selected:
a. Check for obstructions in the area where unit

will be installed. See FIG. 2.

FIG. 2

255mm

1027mm

Dimensions Are Nominal

305 mm

102 mm

Dimensions Are Nominal

3

736mm

Keep These Areas
Free Of Obstructions

362 mm x 362 mm
(± 3 mm) Opening

Front

102 mm

b. The roof must be designed to support 65

Kg. when the Vehicle is in motion. Normally
a 100 Kg. static load design will meet this
requirement.

It is the responsibility of the installer of this
system to ensure structural integrity of the
Vehicle roof. Never create a low spot on the
roof where water will collect. Water standing
around the unit may leak into the interior
causing damage to the product and the Vehi­cle.

c. Check inside the Vehicle for air distribution

box obstructions (i.e. door openings, room

dividers, curtains, ceiling xtures, etc.). See

FIG. 3.

C. Roof Preparation

1. Opening requirements - Before preparing the ceil­ing opening, read all of the following instructions
before beginning the installation.

If an existing roof vent opening will not be used

a 362 mm x 362 mm (± 3 mm) opening must be
cut through the roof and ceiling of the Vehicle.
This opening must be located between the roof
reinforcing members.

There may be electrical wiring between the
roof and the ceiling. Disconnect 220 - 240
VAC power cord and the positive (+) 12 VDC
terminal at the supply battery. Failure to follow
this instruction may create a shock hazard
causing death or severe personal injury.

FIG. 3

125 mm

130 mm

635 mm

508 mm

Dimensions Are Nominal

76 mm

233 mm

139 mm

75 mm

76 mm

362 mm x 362 mm
(± 3 mm) Opening

Dimensions Are Nominal

70 mm
(overall
depth)

Front

152 mm

The 362 mm x 362 mm (± 3 mm) opening is part

of the return air system of the unit and must be

nished in accordance with all applicable national

and local codes and/or regulations.

2. Roof vent removal

a. Unscrew and remove the roof vent.
b. Remove all caulking compound around open-

ing.

c. Seal all screw holes and seams where the roof

gasket will be located. Use a good grade of all
weather sealant. See FIG. 4

FIG. 4

d. If the opening exceeds 365 mm x 365 mm, it

will be necessary to re-size the opening to 362
mm x 362 mm (± 3 mm).

e. If the opening is less than 359 mm x 359 mm,

it must be enlarged to 362 mm x 362 mm (± 3
mm).

3. New opening - (Installation other than vent open­ing)

a. Mark a 362 mm x 362 mm (± 3 mm) square

on the roof and carefully cut the opening.

b. Using the roof opening as a guide, cut the

matching hole in the ceiling.

c. The opening created must be framed to provide

adequate support and prevent air from being
drawn from the roof cavity. Framing stock 19
mm or more in thickness must be used. Re­member to provide an entrance hole for power
supplies at the front of the opening. See FIG.

4

5.

FIG. 5

Do Not Cut
Roof Structure
Or Rafters

19 mm Min.

Good-Rafters
Supported By
Cross Beams

Optional Metal
Frame

Frame Opening So It
Won't Collapse When
Bolting Down Unit

E. Placing Unit On The Roof

This unit weighs approximately 45 Kilograms.
To prevent back injury, use a mechanical hoist
to place unit on roof.

1. Remove the unit from the carton and discard car-

ton.

2. Place the unit on the roof.

3. Lift and place the unit over the prepared opening
using the gasket on the unit as a guide. See FIG.

6.

Leave Access For
Power Supply Wiring

381 mm Min. At
Front Of opening

It is the responsibility of the installer of this
system to ensure structural integrity of the
Vehicle roof. Never create a low spot on the
roof where water will collect. Water standing
around the unit may leak into the interior
causing damage to the product and the Vehi­cle.

D. Wiring Requirements

1. 220 - 240 VAC Supply Wire
Route a copper, with ground, 220 - 240 VAC sup-

ply wire from the time delay fuse or circuit breaker
box to the roof opening. The proper size wire can
be determined from chart on page 3.

Note: If vent fan was removed, the existing wire may be
used provided it is of proper size, location and correctly
fused.

a. This supply wire must be located in the front

portion of the 362 mm x 362 mm (± 3 mm)
opening.

b. The power MUST be on an appropriately sized

separate time delay fuse or circuit breaker. The
proper protection can be determined from chart
on page 3.

c. Make sure that at least 380 mm of supply wire

extends into the roof opening. This ensures an
easy connection at the junction box.

d. Wiring methods must comply with all national

and local wiring codes and/or regulations.

e. Protect the wire where it passes into the open-

ing with approved method. See paragraph "d"
above.

Note: These power supply connections may be replaced

with type Y attachments if done by qualied personal.

FIG. 6

FRONT

Lift And Place

Do Not Slide

Do not slide the unit. This may damage the
roof gasket attached to the bottom and may
create a leaky installation.

4. Place the air distribution box kit inside the Vehicle.
This box contains mounting hardware for the unit
and will be used inside the Vehicle.

This completes the outside work. Minor adjustments can
be done from the inside of the Vehicle if required.

F. Installing The Unit

1. Remove air distribution box and mounting hardware
from carton.

2. Check for correct alignment and adjust the unit as
necessary (Roof gasket centers over the 362 mm
x 362 mm (± 3 mm) opening.

5

3. Base Pan Duct Adapter
a. Remove the liner from the foam tape and posi-

tion on the base so screw hole and air openings

are aligned. Place ange of duct on right hand

side when facing front. See FIG. 7.

FIG. 7

Front

5. EVENLY TIGHTEN MOUNTING BOLTS TO A
TORQUE OF 4.5 TO 5.6 NM (Newton Meters).
This will compress the roof gasket to approxi­mately 13 mm. The bolts are self locking so
further tightening is not necessary. See FIG.

10.

FIG. 10

Mounting Bolts

2 in the front

Discharge
Opening

Return Air
Opening

Remove Liner

Screw

From Foam
Tape

b. Install # 10 screw to help hold the duct adapter

to base pan if desired.

4. Ceiling template installation

Note: The large center hole in the ceiling template goes
to the rear. See FIG. 10.

a. Reach up into the return air opening and pull the

unit electrical wires down for later connection.
See FIG. 8.

FIG. 8

Connect To

Display Board

Connect To

Air Distribution Box

Fasten Power Cable as
per

FIG. 9

b. Connect the AC power lead and the AC power supply

cable together within connection housing

Connect the air sensor to the right hand side of the mou-

c.

FIG. 9.

nting frame in the special clips. Pull the outer plastic cov­ering of the wire back to enable the wire to clip in place.
The outer wiring cover will then hold the wire in place.

Power cable and sensor wiring

FIG. 9

The Customer Power
Cable Fixed Way

The Air Sensor

Fixed Way

Ceiling

Front

frame

Do not Disturb
the position of
air sensor

Mounting Bolt

1 in the back

Pull the ducting
down then.

Trim Duct 13 mm To
25 mm Below Ceiling
Template

Start 3
Mounting
Bolts By
Hand

If bolts are left loose there may not be an ad­equate roof seal or if over tightened, damage
may occur to the unit base or ceiling template.

Tighten to torque specications listed in this

manual.

6. Template/Duct adapter
a. Pull duct down through the template open-

ing.

b. Cut the duct 13 mm to 25 mm below the tem-

plate opening. See FIG. 10.

c. Align the template duct adapter with the tem-

plate duct hole making sure the screw holes
line up (if not, rotate 1/2 turn). Insert template
duct adapter into duct. Leave one loop of wire
below the duct adapter groove. Do not insert
adapter tabs inside the duct.

d. Snap duct adapter into template and install 2

screws through the duct adapter tabs into the
ceiling template. See FIG. 11.

FIG. 11

Fit Duct Adapter
Inside Duct

Duct Adapter Screw
Holes Must Line Up
If Necessary Rotate
1/2 A Turn.

Install 2 Screws In Tabs

6

Route the previously run 220-240 VAC power supply
wire through the strain relief into the junction box.
Tighten connector making sure not to damage wire.

c.

Remove the rear panel of the digital display(2 screws)
plug the communication cable into the display and
replace the rear panel.

FIG. 13

Holding the ADB box up against the ceiling slide both
air filters into place, this will temporally hold the box

in place.

FIG. 12

FIG 12.

13

Position ADB
Walls Inside
And Against
End Of Tem­plate Walls

Check that the air filters are free to be removed
and replaced.

Raise Back
End Of ADB
To Ceiling

While holding the box

against the ceiling slide
both air filters into place

The filters will hold the
box in place while the

screws are fitted

FUNCTION DISPLAY

Digital display.
Displays set temperature.
(Flash when receiving a command)

FIG. 14

Power Status, (Green when
power is on. Stand by mode.)

Auto Button.

Timer Status

, (Yellow

when

timer is set)

Heating Status

, (Orange when

in heating mode)

Cooling Status, (Blue when in
cooling mode)

Auto button.

If the remote control is damaged or lost pressing the Auto button will run the air

conditioner at the automatic mode

(see next page table A).

If the room temperature is below 20 degrees the unit will run in heat mode (HP model)
and ventilation mode (A/C model)

If the room temperature is above 25 degrees the unit will run in cooling mode.

The fan speed will be set to automatic.

8

OPERATING INSTRUCTIONS

A.Remote control

Selecting functional status

FIG. 15

Auto speed

Middle fan speed

Low fan speed

High fan speed

Auto

TU R BO

C

L

O

℃

Turbo

Ventilation

Dehumidification

FAN

E

C

K

D

O

M

Set point

Clock

Automatic mode

Cold mode

Logo

Turbo setting

Clock setting

Temperature/minutes

selection -

°

F

/

℃

setting

°

F

/

℃

SL E EP

R

E

M

I

T

OperationB.

Press to switch on the machine.The previous

a.

operating mode that was selected by the remote
control is automatically used.

Press MODE to select mode.b.

Automatic mode

In this mode the A/C will run automatically and the
running mode will be selected automatically by
comparing the set temperature with the internal
temperature according to table A.

For the automatic speed it wil be set according to

the difference temperature between the set point
and the ambient temperature.

TABLE A

Turbo fan

speed

mode

Heat pump

mode

mode

mode

Fan setting

Temperature/Hours

selection +

Change mode

Time setting

setting

Sleep

ON/OFF

Cold mode

Press MODE button to select cold mode then set the
expected temperature between 18°C and

30°C.

Press the fan speed button to select low, medium or high
fan speed or automatic speed.

Dehumidification mode

Press MODE button to select this function and set the
expected tmeperature between 18°C and

The fan speed will keep the low level.

Ventilation mode

Press MODE button to select ventilation mode then the

30°C.

low, medium or high speed or automatic speed.

Heat pump mode

(Reverse cycle where applicable)(Reverse cycle where applicable)

Press MODE button to select heat pump mode then set the
expected temperature between 18°C and

Press the fan speed button to select low, medium or high
fan speed or automatic speed.

30°C.

Timer off function

The machine must be on.

Press TIMER button to set the time when the machine
need to be switched off.
Press the selection button to change the time when the
machine need to be switched off.
Press the TIMER buttom to confirm the data entered.

Timer on mode

The machine must be off.

Press TIMER button to set the time when the machine

need to be switched on.
Press the selection button to change the time when the
machine need to be switched on.

Press the TIMER buttom to confirm the data entered.

Note: The timer ON and OFF function can only operate

when the hand held remote is in range and able to
communicate with the air conditioner at the set time.
Remote range may vary depending on the installation

environment.

Heat pump (HP model)

or

ventilation (A/C model)

Dehumidification (A/C model)

ventilation (HP model)

9

FAULT CODE & FUNCTION DESCRIPTIONS

Fault condition

Room temperature sensor fault

Evaporator sensor fault

communication fault

Condenser sensor fault

Defrosting instructions

1. Preventing cold air function:

•

When heat mode is selected, the internal fan will

not start until the air within the air conditioner is

heated. This is to prevent cold air blowing into the

living space during start up.

Digital display code

E1

E2

E3

E4

H1

2. Blowing surplus heat function:

In heating mode, the fan will continue to run for appro-

•

ximately 60 seconds after the OFF button is pressed.

Note

Call for service

Call for service

Call for service

Call for service

Indicates defrosting in progress

3. Defrosting function:

At low ambient temperatures approximately

•

the heating mode will periodically enter a defrosting

mode.

Note

•

IPT:evaparator sensor temperature.

•

OPT:condenser sensor temperature.

-5°C

4. Overheat protection

•

In heating mode, detection of the evaparator

temperature IPT,

when IPT

when IPT

when

the original state.

60°C, compressor is not working.

≥

compressor will be contiunted working.

48°C,

≥

48°C

<

IPT

55°C.

≥

The compressor will keep

10

Rear

Roof Opening

ROOF MOUNT ASSEMBLY

Discharge Duct

Duct Adapter

Mounting Bolts

Ceiling Template
With Metal Brackets

Vents

Filter(s)

Air Distribution Box

(ADB)

12

MAINTENANCE

SERVICE-UNIT DOES NOT OPERATE

A. Air Filter

1. Periodically (a minimum of every 2 weeks of opera-

tion) slide out the return air lters located on the
end of the air distribution box. Wash the lters with

soap and warm water, let dry and then reinstall.

Note: To insure easy future removal the lters need to be

replaced with the domed side of their handle positioned
towards the ceiling.

Note: Never run the unit without both return air lters in

place. This will plug the unit evaporator coil with dirt and may
substantially degrade the performance of the unit over time.

B. Air Distribution Box Housing

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

C. Fan Motor

1. The blower motor is factory lubricated and requires
no service.

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

If Caravan connected to motor generator, check to

A.

be sure motor generator is running and producing
power.

If Caravan connected to power supply by a land line,

B.

check to be sure line is sized properly to run unit load
and it is plugged into power supply.

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

C.

Insure fuse is not burnt, or circuit breaker is "ON" and
not activated.

After the above checks, call your local service center

D.

for further help. This unit must be serviced by qualied

service personnel only.

If any wiring or supply cord is damaged and

E.

needs to be replaced, it must be replaced by the
manufacturer or its service agent or a similarly quali-

ed person.

When calling for service, always give the following:

F.

1. Unit type and serial number found on identication

label located on base pan of unit bottom. (Remove

lter and view through network of holes)

2. Air distribution box model and serial number found
on rating plate located on ceiling template. Observe
this rating plate through the air distribution box right
side vent opening.

Dometic Australia Pty Ltd

ABN 620 086 366 305

PO Box 1140
Clayton South
Vic 3169
Tel: [phone]

Fax: [phone]

13