REMKO ML 260 to 680
Air-conditioning packets
Wall units
Operation
Technology
Spare Parts
Edition GB – R05
MALAGA series
REMKO – powerful like a bear.
Operation Instructions
Read these instructions carefully before setting up/operating the unit!
Our guarantee becomes null and void if the unit is used,
set up or maintained improperly, or if modifications are made to the
supplied unit without our prior consent.
Subject to changes!
Air-conditioning packets Wall units
REMKO ML 260 / 350 / 520 / 680
MALAGA series
Contents Page
Safety Instructions 4
Transport and Packaging 4
Description of Device 4
Operation 5
Shutting Down the Unit 9
System Structure 9
Maintenance and Service 10
Troubleshooting 11
Technical Data 12
Dimensions 13
Assembly Instructions for Service Personnel 14
Always keep these operating instructions near or on the unit!
Contents Page
Installation 17
Impermeability Check 18
Electrical Connection 18
Wiring Diagram 19
Condensation Connection 19
Prior to Initial Operation 19
Adding Refrigerant 20
Initial Operation 20
Customer Service and Guarantee 20
Environment and Recycling 21
Certification for Initial Operation 22
* *
3
Safety Instructions
Extensive tests have been conducted on the material,
functionality and quality of the units before they were
shipped.
These units may only be used in accordance with their
intended purpose. Hazards may arise if the units are
used improperly.
Please make sure to follow these safety instructions:
Make sure that personnel trained in the operation of
the air conditioner check the unit for visible defects
on the operating and safety mechanisms .
Before performing any work on the unit, the power
cord must be unplugged and the unit secured
against being switched on by unauthorised persons.
Operate the unit only when assembled and for its in-
tended purpose.
Keep in mind that it is hazardous to remove covers,
protective grilles, etc., during operation; this can lead
to uncontrolled operating situations.
Operate the unit exclusively within the permissible op-
erating ranges.
Observe surrounding temperatures.
Make sure that the unit is kept at a safe distance
from flammable objects.
Always maintain the required minimal distances!
Ensure that no foreign objects block the air inlet and
outlet openings.
Do not place any objects on top of the unit.
Do not insert any objects into the air inlet and outlet
openings.
The outdoor unit may only be connected to a cor-
rectly installed and grounded power supply.
Never operate the units in rooms susceptible to ex-
plosions. The units are also not suitable for operation in rooms containing large amounts of dust or aggressive air.
Do not use flammable sprays such as hair spray or
spray paint in the direct vicinity of the units.
Do not operate the units if the atmosphere is con-
taminated by oil, sulphur or salt.
Do not expose the unit to direct streams of water.
High-pressure cleaners, etc.
The device is only guaranteed to operate optimally
within the permissible operating ranges.
Never open the units‘ housing.
Doing so may cause an electric shock.
Protect the connection pipes and lines from being
damaged, for example, by animals.
Regularly check that condensation is not blocked from
flowing out of the unit.
Never operate the indoor units without an air filter!
Make sure that the outdoor unit is equipped with a
safety mechanism which prevents condensation damage caused by the unit switching back on right away
after it has been switched off.
The unit may only be switched back on after 3 minutes.
Cleaning and minor maintenance work made only be
performed by the operator or an authorised person
designated by the operator in accordance with the
instructions contained in the "Maintenance and Service" section.
These REMKO air conditioners are supplied with the
environmentally-friendly refrigerant R 407 C.
Installation and repair work may only be performed
by authorised personnel.
Transport and Packaging
The units are shipped in a stable transport box made of
cardboard. Please examine the unit when it is delivered.
Make note of any damage or missing parts on the shipping bill and notify the shipping company and your contract partner.
We do not assume any liability for subsequent complaints.
Description of Device
The REMKO ML 260 to 680 air-conditioners have a
REMKO ML ...-AT outdoor unit designed for wall or floor
installation outside and an ML ...-IT indoor unit designed for upper wall installation inside.
The way the air conditioning system works is quite simple; the indoor unit removes warm air from the room to
be cooled. The environmentally-friendly refrigerant
R 407C transports this warm air just as it does for many
other REMKO air-conditioning products. The outdoor
unit releases the absorbed heat to the outside.
The units also filter and dehumidify the air, thus creating a comfortable climate in the room. The units operate
fully-automatically and offer a range of other options
thanks to their microprocessor control. They are easily
operated using the supplied infrared remote control.
4
Operation
Two to four seconds after the indoor unit has been connected to the power supply, operation can begin.
Inserting the batteries into the remote control
Prior to initial operation, the batteries supplied with the
unit (2 type AAA batteries) must be inserted into the remote control.
1. Slide off the cover of the battery slot on the back of
the remote control and insert the batteries.
2. Make sure that the polarity is correct.
Use the labelling in the slot.
3. Close the battery slot again.
The remote control
The air conditioner is operated using the infrared remote control.
A beep the signal has been correctly received after a
button is pressed.
2
1
4
5
7
9
11
13
1 ON/OFF button
The unit is switched on with this button.
The settings appear on the display.
2 button
This button is used to decrease the temperature
down to no lower than 16°C.
3
6
8
10
12
14
3 button
This button is used to increase the temperature up
to a maximum of 31°C.
4 Mode button
The operating mode is selected with this button. The
indoor unit has 4 modes:
Automatic:
In this mode, the unit operates in cooling or heating mode.
Operating cycle of the compressor:
On → 20 min. Off → 10 min.
Cooling:
In this mode, the warm room air is cooled down to
the desired temperature.
Dehumidifying:
In this mode, the room is primarily dehumidified
and the set temperature is maintained.
Heating:
This mode is not available.
If this mode is activated, the compressor begins to
operate and causes the unit to malfunction!
5 Fan button
The desired fan speed is set with this button.
The following 4 speeds are available:
Automatic, low, medium and high fan speed.
6 Fin button
The position of the air outlet fins is set with this button.
There are 5 positions and an oscillating function
available.
7 Sleep button
After this button is pressed in cooling mode, the target temperature automatically increases by 1°C
within one hour.
8 SWING button
This button immediately activates the oscillating
function of the fins to improve the air distribution in
the room.
9 Timer On button
The unit is programmed to automatically switch on
within the next 24 hour-period with this button.
10 Timer Off button
The unit is programmed to automatically switch off
within the next 24 hour-period with this button.
11 HR button
The hours are set with this button.
12 MIN button
The minutes are set with this button.
13 Reset button (in the battery slot)
The settings are reset by pressing this button.
14 Clock button (in the battery slot)
The time setting is activated by pressing this button.
5
Button functionality
The following settings can be made using the remote control at a distance of no more than 7m. Point the remote
control at the receiver on the right side of the indoor unit. The unit beeps to confirm that a button has been pressed
and the signal has been correctly received.
The blinking dot on the remote control
indicates that the remote control is ready
for use.
RESET button
By pressing the RESET button inside the battery slot, the remote control can be reset .
Then, the time must be programmed (see “CLOCK” button).
Functional process
CLOCK button
By pressing the CLOCK button inside the battery slot, the time is programmed.
“CLOCK” blinks on the display and the current time is set using the HR. and MIN. buttons. Pressing the CLOCK button again closes the programming function and the display no longer blinks.
Functional process
A symbol on the display shows that the
settings are being transmitted.
RESET 5 sec. Time setting
CLOCK HR./ MIN. CLOCK
ON / OFF button
buttons
By pressing the ON / OFF button, the air conditioner is activated or deactivated. The
settings and setting values programmed before the unit was last switched off appear
on the display.
Functional process
ON/OFF ON/OFF
The button reduces the desired target temperature and the button increases the
target temperature. This setting is only possible in cooling mode. In automatic mode,
the button decreases the fixed temperature by 1°C and the button increases the
fixed temperature by 1°C. It is not possible to set the temperature. In dehumidifying
mode, the temperature cannot be set.
Functional process
Cooling mode
The display
disappears
after 1 min
Automatic mode
.
6
Mode button Use the MODE button to select the individual operating modes. There are 4 modes
available:
1. Automatic, automatic selection of cooling or heating mode
2. Cooling, operating mode primarily for summer
3. Dehumidifying, summer or winter operating mode
4. Heating, not available
Functional process
Automatic Cooling Dehumidifying Heating
MODE MODE MODE MODE
Automatic mode
Cooling mode
Dehumidifying mode
In automatic mode, the control mechanism operates in cooling mode.
A target temperature of 24°C is permanently set. The range lies between 22°C and 26°
C. This can be increased or decreased by 1°C with the buttons.
Functional process
MODE
COOLING MODE
In cooling mode, the room air is cooled to the set target temperature. The desired room
temperature is set in 1°C increments with the buttons. If the temperature is
1°C above the set target temperature, the indoor unit begins to cool the room air. If the
room temperature falls approx. 0.5°C below the set room temperature, the control
mechanism switches cooling mode off. To protect the compressor, the control mechanism is first reactivated after 3 minutes have elapsed.
Functional process
MODUS
COOLING MODE
In dehumidifying mode, the room temperature is decreased to 24°C. Due to the low
temperature of the refrigerant, the temperature of the fin exchanger falls below the dew
point of the air. The excessive moisture in the air condenses on the fin-exchanger and
the room is dehumidified. The fan speed should be set to automatic to reach maximum
dehumidification capacity. In automatic mode, the fan switches on and off at intervals.
Heating mode
FAN button
Functional process
MODUS
DEHUMIDIFICATION MODE
This mode is not available.
The fan speed is selected with this button. You can select either low, medium, high or
automatic fan speed.
Functional process
FAN FAN FAN FAN
7
Fin button
The air outlet fins are individually set with this button. You can select 5 positions and an oscillating function.
Functional process
Swing button
Sleep button
Timer buttons
The oscillating function of the air outlet fins is set with this button. This enables you to immediately switch between a set position and the oscillating function. The swing function improves the air distribution in the room.
Functional process
Swing Swing Swing
With this button, programming is activated that increases the target temperature by 1°C
after one hour and 2°C after two hours when the unit is in cooling mode. The unit automatically switches off after 8 hours.
Functional process
Sleep Sleep Sleep
The unit is programmed to automatically switch on or off with this button. By pressing the
timer on or off button, the timer is activated and the time display disappears. The timer
symbol for the timer on or off time blinks. The timer display of the indoor unit is illuminated.
By pressing the HR. and MIN. buttons, the desired timer on or off time is set. Once the setting is made, the timer symbol blinks for another 30 seconds.
If the programmed time is reached, the unit automatically switches on or off. If the indoor
unit automatically switches on, the last mode, temperature and fan speed settings are activated.
To deactivate the timer on or off function prior to its activation time, press the corresponding timer button or the ON/OFF button.
Timer On
Timer Off
Timer On and Off
8
Functional process
Timer On
Timer Off
Once the unit is programmed, the control mechanism immediately switches
the unit off. The control mechanism
switches the unit on every day at the
programmed time. When the unit is on,
all settings are visible on the display.
When the unit is off, only the timer
settings are visible.
HR. / MIN.
HR. / MIN.
30 sec.
30 sec.
Unit on Unit off
Programmed
time reached
Programmed
time reached
Example:
The control mechanism switches on at 10:20 AM
The unit operates until 5:00 PM.
The control mechanism switches off at 5:00 PM.
The unit is off until 10:20 AM.
The control mechanism switches on at 10:20 AM
Unit in
operation
Unit is off
LED display on the indoor unit
POWER On / Off (red)
PROTECT Compressor protection (green)
RUN Compressor mode (green)
TIMER Timer mode (yellow)
Display Room temperature / target temperature
error code
The display changes to the target temperature display
when the settings are made with the remote control.
Malfunction display
E3
RUN and TIMER LEDs blink alternately.
Unit switches off after approx. 30 seconds.
E5 TIMER LED blinks. Room air sensor
E6 RUN LED blinks. Frost protection
E9 The LEDs blink alternately for 20 minutes.
Unit switches off after another 20 minutes.
LED error code
Cause
Fan motor
sensor
Insufficient refrigerant
First, remedy the cause of the problem and then reset
the error code display by switching the unit off and off.
Shutting Down the Unit
Temporary shutdown
1. Let the unit run in cool mode for 30 minutes at a
temperature setting of 31°C.
2. Switch the indoor unit off using the remote control.
3. Disconnect the system with the main switch or fuse
protection from the power supply.
4. Check the indoor unit for visible damage.
5. Clean the indoor unit as described in the
“Maintenance and Service” section.
6. If possible, cover the outdoor unit with a plastic
sheet to protect it from weather conditions.
Permanent shutdown
For environmental safety reasons, the air conditioners
may only be disassembled by authorised service centres.
System Structure
Manual operation
The unit can be manually operated if, for example, the
infrared remote control is not functioning properly or
has been lost.
Open the air inlet grille of the indoor unit and press the
button on the right side.
The following operating modes are then activated:
MODE = Automatic
On → 20 min. Off → 10 min.)
(Operating cycle of the compressor
TEMP. = 24°C, FAN = Automatic
SWING = On, TIMER = Off.
Manual air distribution
There are individually adjustable air directing plate fins
on the air outlet side for horizontally distributing the air.
Set the air directing plate fins in the desired position
with the left and right adjustment levers.
Left adjustment
lever
Right adjustment
lever
Never adjust the fins when the unit is in automatic
swing mode! Do not reach into the unit!
There is a risk of injuring your hand on the fan
*
motor.
8 9
1
5
6
7
3
2
11
15
1 Indoor unit ML ...-IT
2 Outdoor unit ML ...-AT
3 Infrared remote control
4 Refrigerant pipes
5 Air inlet grille
6 Air outlet fin with swing motor
7 Manual air directing plate fin
(covered)
12
14
10
4
Inside
Outside
13
8 Display
9 Receiver
10 Manual mode switch
11 Condenser fan
12 Wall lead-through
13 Shut-off valve
14 Condensation connection ML ...-IT
15 Air outlet
9
Maintenance and Service
Before any work on the units is performed, they
must be disconnected from the power supply and
*
secured against being inadvertently switched on!
Regular care and the observation of a number of basic
rules will ensure the unit’s long service life and reliable
operation.
Keep the units free of dirt and other deposits.
Clean the units with a damp cloth.
Do not expose the units to a direct stream of water.
Do not use an abrasive cleaning agent or one that
contains solvent.
If the units are extremely dirty, only use suitable clean-
ing materials.
Before and after the operating season, check
whether the diameter of the condensation pipes has
become smaller as a result of dirt.
If so, they must be cleaned.
Before taking the unit out of operation for a longer
period of time, clean the plate fins of the outside
unit while the ventilator is in operation.
Clean the air filters of the indoor unit at regular inter-
vals, more often if necessary, as described on this
page.
Never operate the indoor unit without the air filter.
The air filter prevents the plate fin exchanger of the
indoor unit from becoming dirty and the unit’s per-
*
formance from being adversely affected.
We recommend concluding a maintenance agree-
ment with a company who specialises in this type of
work.
This will guarantee that the system operates safely
at all times!
Cleaning the filters
Clean both air intake filters at intervals of no longer than
two weeks. If the air is extremely dirty, shorten this timeframe accordingly.
To clean the air filters, proceed as follows:
1. Open the front of the unit by pushing the grille up
and locking it into place.
2. Lift the filters up and then pull them out.
3. Clean the filters using a standard vacuum cleaner.
3. Extreme dirt can be carefully removed with lukewarm water.
Then let the filters air dry.
4. Replace the filters and close the grille.
10
Troubleshooting
This unit has been designed based on state-of-the-art manufacturing methods and it has been tested repeatedly to
ensure that it is working properly. However, should problems occur, refer to the following list.
* *
supply (fuse or repair switch) and secured against being inadvertently switched on!
Problem Possible cause Check Remedy
Before any work on the units is performed, they must be disconnected from the power
The unit does not start
or it switches itself off
automatically.
The indoor unit is not
responding to the remote control.
The device is either
not cooling at all or
only a little bit.
Condensation water is
leaking from the indoor
unit.
Power failure, power too low Are all other electrical components
Power fuse / power supply defective
Power supply line damaged Are all other electrical components
Amount of time waited after
switching unit on was too short
Operating temperature too low /
too high
Excess current caused by thunderstorms
Problem with the external condensation pump
Sensors that are defective or not
properly attached
Timer set to “ON” Is the timer set? Clear programming and wait for the unit to
Polarity of batteries incorrect after
replacement
Transmission distance too great /
reception blocked
Remote control defective Does the unit work in manual
Too much direct sunlight on the
receiver or transmitter
Electromagnetic fields are disrupting transmission
Remote control buttons stuck /
two buttons pressed at once
Dead batteries in the remote control
Temperature setting too high Is the selected temperature above
Filter is dirty/ intake / outlet opening is blocked by foreign bodies
Windows and doors are opened /
increased amount of warm air or
cold air
Cool mode is not set Does the Cool symbol (COOL)
Plate fins of the outer unit are
blocked by foreign bodies
Thermal or wind load has increased
Heat cannot be expelled Is the fan on the outdoor unit work-
Cooling cycle is not leak proof Is there a build-up of frost visible
The drainage pipe of the condensation collector is blocked / damaged
External condensation pump or
float regulator is defective
working?
Are all currents for lighting func-
tional?
working?
Did approx. 5 minutes elapse after
restarting?
Are the fans on the indoor unit and
outdoor unit working?
Was there recently lightning in the
region ?
Did the pump switch off due to a
malfunction?
Is the indoor unit displaying an er-
ror message?
Is the polarity correct? Insert batteries with the correct polarity
Is there a transmission signal when
the button is pressed?
mode?
Does the unit work in the shade? Place the transmitter or receiver in the
Does the unit work after potential
causes of disruption have been
eliminated?
Does the symbol appear on the
display?
Are the batteries new? Is the display incomplete?
room temperature?
Have the filters been cleaned? Clean filters
Have there been changes in design or use?
appear on the display?
Is the fan of the outdoor unit working,
are the plate fin exchangers moving
freely?
Have there been changes in design or use?
ing?
on the plate fin exchangers of the
indoor unit?
Can condensation flow freely? Clean the drainage pipe and the condensa-
Is the collector filled with water and
the pump is not working?
Check current and wait for the device to start
again
Replace power fuse /
Switch on main switch
Maintenance by authorised service centre
Plan for longer waiting periods
Pay attention to temperature ranges of indoor unit and outdoor unit
Switch the system off and then back on again /
Maintenance by authorised service centre
Check pump and clean if necessary
Maintenance by authorised service centre
start
Reduce distance to under 7 m and change
location
Replace remote control
shade
No signal transmission when sources of dis-
ruption are operated simultaneously
Unstick button / only press one button
Insert new batteries
Reduce selected temperature
Close the windows and doors / mount additional systems
Correct the unit settings
Check the fan or winter control mechanism,
reduce air resistance
Take corresponding measures to decrease
the thermal or wind load
Check the fan / winter regulation mechanism
Maintenance by authorised service centre
tion collector
Have pump checked by authorised service
centre
Should the unit still not work after performing these functional checks, please contact the closest dealer or
REMKO GmbH & Co KG. directly.
11
Technical Data
ML 260 ML 350 ML 520 ML 680
Nominal cooling capacity* kW 2.59 3.50 5.27 6.80
Energy efficiency class cooling C C D D
Energy efficiency ratio
EER 2.82 2.82 2.61 2.61
Power consumption in 500 hours kWh 460 620 1010 1305
Operational area (
size of room), approx. m³ 80 110 160 230
Refrigerant R 407C
Injection pipe connection
Suction pipe connection
Inches
(mm)
Inches
(mm)
3/8 (9.52) 1/2 (12.7) 5/8 (16.0)
1/4 (6.35) 3/8 (9.52)
Refrigerant pipe, length max. m 10 15
Refrigerant pipe, height max. 5 8
Refrigerant, base quantity g 680 1050 1700 1730
Refrigerant, additional amount > 5 m g/m 15 20 30 35
Power supply V/Ph/Hz 230 / 1~ / 50
Nominal power consumption cooling * kW 0.92 1.24 2.02 2.61
Nominal current consumption cooling* A 4.35 5.55 10.58 13.45
Respective indoor unit ML 260-IT ML 350-IT ML 520-IT ML 680-IT
Operating range °C +16 to +32
Circulating air volume per speed m³/h 270/320/400 330/410/500 500/610/750 600/730/900
Protection type IP X0
Sound pressure level per speed ** dB(A) 33 / 36 / 41 35 / 38 / 42 36 / 40 / 44 38 / 41 / 46
Dimensions height mm 268 286 326
width mm 788 886 1096
depth mm 180 180 215
Weight kg 8 9 15 15
Respective outdoor unit ML 260-AT ML 350-AT ML 520-AT ML 680-AT
Operating range °C +21 to +45 (with optional winter regulation -10 to +45)
Circulating air volume, max. m³/h 1620 1740 2520 3600
Protection type IP X4
Sound pressure level, max. ** dB(A) 50 51 54 58
Dimensions height mm 543 548 605 730
width mm 645 700 805 860
depth mm 265 275 305 325
Weight kg 29 35 53 76
Serial number 700.... 701.... 702.... 703....
Ref. number 1618260 1618350 1618520 1618680
* Room temperature DB 27°C, WB 19°C; outside temperature DB 35°C, WB 24°C
** Distance 1m
12
Dimensions
ML 260 AT ML 260 IT
ML 350 AT
645
480
700
440
265
280
275
280
548
543
268
ML 350 IT
286
788
886
180
180
ML 520 AT
ML 680 AT
805
540
860
305
330
325
ML 520 IT
605
ML 680 IT
730
326
326
1096
1096
215
215
630
340
13
Assembly Instructions for
Service Personnel
Important instructions prior to installation
Ensure that the contents of the package are com-
plete and that the units have no visible damage resulting from transport. Any problems must be communicated directly to your contract partner and the
shipping company.
Subsequent complaints will not be acknowledged.
Place the unit in its original packaging as close as
possible to the location where it will be assembled to
prevent damage from transport.
Prior to installation, check that the electrical connec-
tion values and the data on the type plate are
consistent.
Do not install the unit in the direct vicinity of objects
that emit intense heat.
Lights, etc.
Select a location to set up the unit where air can flow
freely in and out of the device.
Observe minimum distance.
Only use the swivel nuts supplied for the refrigerant
pipes. Other components can damage the thread.
Remove the protective caps of the unit connections
just before connecting the refrigerant pipes.
Make sure that the maximum length of 10 or 15 me-
ters for the refrigerant pipes is not exceeded and the
difference in height to the unit is not more than 5 or
8 meters.
The refrigerant pipes may not be bent or pressed.
Make sure that all refrigerant pipes including all con-
nectors and valves are insulated against heat and
sealed against diffusion.
Only add additional refrigerant to the system if the
length of the refrigerant pipes exceeds 5 meters.
See the “Adding refrigerant” section for the additional refrigerant amounts.
The condensation pipe must be placed at an incline
of at least 2%.
If this pipe is connected to a sewage pipe, an odour
seal must be installed the upper edge of which
may not extend beyond the lower edge of the indoor
unit.
All electrical connections must meet the relevant re-
quirements. The power supply is only connected to
the outdoor unit.
The control line to the indoor units should be laid at the
same time as the refrigerant pipes.
Make sure that the electrical lines have been prop-
erly attached in the electrical terminals.
The indoor unit and outdoor unit of the REMKO air-
conditioner have been adjusted to one another from
a technical standpoint.
The guarantee becomes null and void if third-party
components are used.
Remember that when installing and maintaining air
conditioners, high-pressure refrigerant pipes and
electrical current can pose hazards.
During unit operation, some components in the cool-
ing cycle can reach temperatures of more than
70°C.
Be especially careful when covers are removed.
Preventable installation mistakes
Make absolutely sure to follow the instructions below
when installing the indoor unit:
Place the pipes between the indoor unit and the out-
door unit and keep the length of the refrigerate pipes
as short as possible.
The shut-off valve of the refrigerant pipes may only
be opened once installation is complete.
Always secure electrical lines properly in the electri-
cal terminals.
Not doing so could cause a fire.
Seal open refrigerant pipes with suitable caps and/or
adhesives to prevent moisture penetration.
Avoid bending the pipes unnecessarily.
This minimises pressure loss in the refrigerant pipes
and guarantees that the compressor oil can flow
freely.
If the outdoor unit is mounted above the indoor unit,
you must take steps to recirculate the oil.
See section on oil recirculation.
Do not set up the unit in the direct proximity of de-
vices that emit intense heat, such as glass reflection
surfaces.
If the unit is assembled close to heat emissions, the
amount of warm air expelled by the plate fins of the outdoor unit is reduced.
14
Setup locations for the outdoor unit
Snow:
The unit must be set up on a surface that is level,
smooth and solid. The unit must also be secured
against tipping over.
The outdoor unit can either be set up outside or inside a
building. If it is set up outside, follow these instructions
to protect the unit from weather conditions.
Rain:
If the unit is set up on the ground or a roof, there
must be at least 10 cm (measurement X in the illustration below) between it and the surface.
This prevents dirt and rust caused by splashing rain.
A base console can be purchased as an accessory.
Sun:
The plate fin heat-exchanger (condenser) on the outdoor unit is a heat-emitting component.
Direct sunlight also increases the temperature of the
plate fins and reduces the amount of heat expelled by
the plate fins exchanger.
If possible, the outdoor unit should be installed on the
north side of the respective building.
A small structure should be set up to provide shade for
the unit and protect it from the sun if necessary. However, it must not be allowed to interfere with the flow of
hot air being released from the unit.
The unit should be installed on the wall in areas with
heavy snowfall.
The unit should be installed at least 20 cm above the
expected snow level to prevent snow from entering the
outdoor unit.
A wall console can be purchased as an accessory.
Setup inside buildings:
If the outdoor unit is set up inside a building, observe
the following:
If the outdoor unit is set up in a basement, an attic,
in adjoining rooms or halls, make sure that the warm
air can be adequately released.
Install an additional fan that has the same circulating
air volume as the outdoor unit set up in the room
which can potentially compensate for additional
pressure losses through air channels.
Warm air
Light
shaft
Additonal
Warm air
fan
Outdoor
unit
Cold
fresh air
Light
shaft
Wind:
If the unit is operated primarily in windy areas, make
sure that the hot air current being released from the unit
is flowing in the primary wind direction.
Wind
If this is not possible, you should provide protection from
the wind. Make sure that the wind protection does not adversely affect the flow of air to the unit.
Make sure that air can be freely supplied from the
outside, if possible through air openings opposite the
unit that are sufficiently large.
Ensure that there is adequate soundproofing to pre-
vent excessive noise in residences.
Never block or shut the intake grille.
Observe the static and other structural engineering
regulations and requirements for the building.
Do not set up the unit in areas with lots of dust or
aggressive air.
15
Minimum distances
Lead-through options
These safety zones ensure that air can flow freely in and
out of the unit, that maintenance and repair work can be
performed and they protect the unit from damage.
Minimum distances for the outdoor units
The figure below indicates the minimum distances that
must be maintained to ensure that the outdoor units operate properly.
E
A
B
C
D
ML 260 ML 350 ML 520 ML 680
A 100 mm 150 mm
B 700 mm 900 mm
C 400 mm
D 100 mm 150 mm
E 400 mm 600 mm 200 mm
Minimum distances for the indoor units
The distances required for smooth operation of the indoor
unit are specified in the following figure.
120
Prior to installation, take a look at the various options
for lead-throughs of the refrigerant, condensation and
control lines (see figure below).
1
2
4
5
3
1 Opening on the wall right 2 Opening through the wall rear
3 Opening on the wall bottom 4 Opening through the wall rear
5 Opening on the wall left
Wall lead-throughs
Wall lead-throughs are necessary to establish the connection between the indoor unit and the outdoor unit.
Please observe the following:
A lead-through of at least 70 mm in diameter must
be created.
The lead-through must be placed at an incline of at
least 10 mm between the inside and outside.
Before beginning work, make sure that there are no
supply pipes (water, etc.) located in the vicinity of
the wall lead-through.
We recommend cushioning the inside of the hole or
lining it with a PVC pipe to prevent damage to the
pipes.
120
120
1500
200
Dimensions in mm
Attaching the wall mount
The units must be attached with suitable screws and
dowels. The attachment points are displayed in the
following figure.
16
Refrigerant
suction pipe
Control line
Refrigerant
injection pipe
If REMKO refrigerant pipes are used, the electrical
Condensation pipe
control line and the condensation pipe must be provided by the customer.
Therefore, the lead-through to be created must be
adapted according to the pipes provided by the customer.
After assembly is complete, the wall lead-through
must be sealed with a suitable sealing compound.
Do not use any materials containing cement or lime!
Installation
The following instructions describe the installation of the
cooling cycle and the assembly of the indoor and outdoor
unit.
1. The required pipe diameters are provided in the
"Technical Data” table.
2. Begin with the installtion of the indoor unit.
3. Remove the supplied screw caps and use these for
continued assembly.
4. Before you flare the refrigerant pipes, make sure
that the screw cap is placed on the hose.
5. Work with the refrigerant pipes as shown in the
figure below.
Refrigerant pipe
Deburrer
Only tools approved for use in cold conditions may
be used.
*
Pipe cutter, deburrer and flare tool.
6. Check that the flare has the correct shape.
rippled
7. First manually connect the refrigerant pipes with the
shut-off valves to ensure that they are in the proper
position.
8. Now tighten the bolts using 2 wrenches with a sufficiently wide opening.
Use a second wrench to apply counterpressure
when tightening. (See figure)
formation
of cracks
formation
of cracks
Flare tool
uneven
thickness
CORRECT
10. If, due to structural design conditions, it is not possible to guide the condensation pipe through as well,
make sure that the condensation can drain freely at
all times.
11. Hang the indoor unit leaning
slightly to the back in the previously assembled wall mount
and press the bottom of the
unit into the mount.
Do not damage the pipes and
ensure that they are in the correct position.
12. Assemble the indoor unit in such a way that condensation drainage is not blocked and air can always
flow freely in and out of the unit.
13. When assembling the unit, observe the bending radii
of the refrigerant pipes and never bend the hose in
the same place twice.
This may cause the pipe to become brittle or crack.
14. Place the refrigerant pipes between the indoor unit
and the outdoor unit.
Make sure that they are securely fastened and take
steps to recirculate the oil!
15. Install the outdoor unit with the wall or base console
onto stationery building parts approved for this purpose.
Follow the installation instructions for the consoles.
16. Make sure that no structure-borne sound is transmitted to parts of the building.
Structure-borne sound can be reduced through vibration absorbers!
17. Now connect the refrigerant pipes to the outdoor unit
as described above.
18. Insulate both the installed refrigerant pipes and the
connector against heat.
19. Only use insulation hoses suitable for this temperature range that are sealed against diffusion.
If the length of the connection pipe is longer than 5
m, refrigerant must be added to the system during
initial operation.
*
See the “Adding refrigerant” section
.
Apply counterpressure
Wrench 2
Tighten
Wrench 1
9. If you have selected option 2 or 4 (drainage through
the wall), guide the condensation water pipe and
control line through the wall lead-through to the indoor unit. If you also need a condensation pump, it
must be installed beforehand.
17
Oil recirculation
If the outdoor unit is set up at a higher level than the indoor unit, appropriate steps must be taken for oil recirculation.
Outdoor unit
Oil elevation arc in the suction pipe
to the outdoor unit
1x for every 2.5 meters of
pipe going up
max. 8/10 m
Electrical Connection
All electrical installations may only be performed by
authorised service centres in line with the relevant regulations. Local guidelines for operation as well as the requirements established by local energy supply companies must be observed for setup and initial operation.
The diameter of the power supply line is based on the
structural conditions and the power supply capacity of
the unit.
A power supply must be installed to the outdoor unit
and a 4-wire control line must be installed from the outdoor unit to the indoor unit.
We recommend using a shielded line with a diameter of
at least 1.5 mm² for the control lines.
Radius:
50 mm
This is usually accomplished by creating an oil elevation
arc that is installed every 2.5 meters of pipe going up.
Indoor unit
Impermeability Test
Once all connections have been made, the manometer
station is connected to the corresponding valve connections as described below:
red = small valve = injection pressure.
blue = large valve = suction pressure.
After the connection has been made, an impermeability
test is conducted using dry nitrogen.
The connections that have been established are
sprayed with a leak locator spray to test for impermeability. Tighten the bolts more firmly or, if necessary,
create a new flare.
After this test has been successfully conducted, any excess pressure is removed from the refrigerant pipes and
a vacuum pump with an absolute final partial pressure
of at least 0.01 mbar is put into operation to create a
vacuum in the pipes. This also removes any moisture
from the pipes.
A vacuum with a minimum of 0.05 mbar must be
created!
*
How long it takes to create the vacuum is based on the
hose line volume of the indoor unit and the length of the
refrigerant pipes. However, this process takes a minimum of 30 minutes.
Once foreign gases and moisture have been completely
removed from the system, the manometer station
valves are closed and the valves of the outdoor unit are
opened as described in the "Initial Operation" section.
Prior to performing any work on the unit, it must
be unplugged from the power supply and secured
*
against being inadvertently switched on!
Connecting the indoor unit
Prior to installing the connection, observe the following:
Power is supplied to the indoor unit via a control line
from the outdoor unit.
The system’s fuse protection must comply with the
technical data.
The terminals of the connections are located on the
right-hand side of the indoor unit.
Terminal
Cover
Control line
Strain relief
Control line
To connect the units, proceed as follows:
1. Open the air inlet grille.
2. Using a Phillips screwdriver, loosen the cover on the
right side.
3. Connect the unit to the current-free line from the
outer unit.
See Wiring Diagram.
4. Reassemble the unit.
18
Connecting the outdoor unit
Prior to installing the connection, observed the following:
The customer must install the con-
trol box close to the outdoor unit.
We recommend using a main or
repair switch.
Power is supplied to the indoor unit
via the connection line from the
outdoor unit.
The system’s electrical fuse protec-
tion must comply with the technical
data.
Proceed as follows to connect the lines:
1. Remove the cover above the shut-off valves.
2. Select the diameter of the connection line(s) based
on the requirements.
3. Guide the connection line and the control line to the
unit.
4. Connect the lines according to the wiring diagram.
5. Place the line securely in the strain relief and reassemble the unit.
Wiring Diagram
Indoor unit
L
N
7
PE PE
Outdoor unit
Phase conductor
L
N
Neutral conductor
7
Compressor contact
Protecting earthing
conductor
Power supply
L1
230 V~,
N
50 Hz,
L1 / N / PE
PE
Condensation Connection
Condensation forms on the plate fin exchanger of the
indoor unit during cooling operation because temperatures below the dew point are reached.
The indoor unit is equipped with a collection tray and a
condensation hose for the condensation that accumulates.
Follow the instructions below to lay the condensation
hose:
The condensation drain is generally placed in the
same guideway as the refrigerant pipes.
If, as a result of structural design conditions, it is neces-
sary to have a different guideway for the condensation
drain, the hose can also be guided to the indoor unit
through a different drain.
If the unit is being operated at outside temperatures be-
low 0°C, the pipes must be placed in such a way that
they are protected from frost.
Always use suitable hose clips.
If the condensation is being guided to a sewage
pipe, please install a siphon-like hose guideway
which acts as an odour seal.
Make sure there is an adequate
incline for drainage.
It must be at least 2%!
The supplied condensation
2% incline
hose can be extended using
standard hoses.
Since condensation is created, the condensation
hose must be isolated.
After the hose has been laid, check to make sure
that condensation can drain freely.
Prior to Initial Operation
After the impermeability check has been performed, the
vacuum pump must be connected to the valve connections of the outdoor unit by means of the manometer
station and a vacuum must be created.
Prior to initial operation of the unit and after contact with
the cooling cycle, the following checks must be performed and documented in the initial operation log:
Check all refrigerant pipes and valves for leaks with
a leak locator spray or soapy water.
This must be performed with the unit off.
Check the connection lines to ensure that the suc-
tion and injection pipes have not been reversed.
Check the refrigerant pipes and insulation for dam-
age.
Check that the condensation is draining properly.
Check that all additional components are functioning
properly.
Condensation pumps, etc.
Check the electrical connection between the indoor
unit and the outdoor unit for the correct polarity.
Check all fixtures and suspended parts to ensure
that they are in the proper position and at the correct
height.
If the refrigerant pipe is longer than 5 m, more refrigerant should be added to the system.
*
19
Adding Refrigerant
The refrigerant required for operating the system is
located in the outdoor unit.
For refrigerant pipes longer than 5 m per cycle, refrigerant must be added using the following table:
5. Turn the main switch or the fuse on.
6. Adjust the target temperature on the indoor unit to a
lower value than the existing room temperature using the remote control.
7. Switch the indoor unit to cooling mode using the remote control.
ML 260 ML 350 ML 520 ML680
Length of pipe Amount per meter
Up to and including 5 m
5 m to max. 15 m 15 g/m 20 g/m 30 g/m 35 g/m
Proceed as follows to add the additional refrigerant
required:
1. Remove the vacuum pump and connect the filling
cylinder.
2. Place the open cylinder on a scale and calibrate the
scale to zero.
3. Ventilate the hose at the height of the manometer
distribution pipe.
4. Use the table above to determine the quantity to
add.
5. Open the suction pressure side of the manometer to
start adding refrigerant.
6. Close the manometer valve when the determined
amount has been added.
–––
The compressor starts a couple of minutes later
due to the delayed start of the outdoor unit.
*
8. Check that the fan and compressor are running
smoothly and that cold air is being expelled from the
indoor unit and warm air from the outdoor unit.
9. During the test run, check all regulating, control and
safety mechanisms to ensure that they are functioning and set properly.
10. Check the indoor unit’s control mechanism using the
functions described in the operating instructions.
Timer, temperature settings, fan mode and dehumidifying mode as well as all other mode settings.
11. Measure overheating, outside, inside, outlet and
evaporation temperatures and enter these values in
the initial operation log.
12. Remove the manometer and reattach all parts that
were removed.
Make sure that there are seals in the closing caps.
13. Familiarise the operator with the system.
Initial Operation
Initial operation of the unit must comply with the certification specifications and be documented.
After all components have been connected and
checked, the system can be put into operation.
To ensure that the unit is functioning properly, a functional check must be performed to identify any irregularities during unit operation before the unit is handed
over to the operator.
Proceed with the functional check as follows:
1. Remove the caps from the valves.
2. To begin initial operation, briefly open the shut-off
valves until the manometer displays pressure measuring approx. 2 bar.
3. Check the impermeability of all established connections with a leak locator spray or suitable devices.
4. If you did not find any leaks, open the shut-off valves
by turning them all the way counter-clockwise with a
hexagonal wrench.
If you find leaks, the connection must be reestablished. It is absolutely necessary to create a
new vacuum and dry the unit!
Customer Service and
Guarantee
For the guarantee to be valid, the purchaser or his cus-
tomer must completely fill out the "guarantee certificate"
enclosed with all units and send it back to REMKO GmbH
& Co. KG
The units are repeatedly tested at the production site to
ensure that they are working properly. If a malfunction
occurs that cannot be eliminated by the operating personnel, please contact your dealer or contract party.
*
Proper Use
The ML … IT indoor units have been designed and
equipped exclusively for operation with ML … AT outdoor
units.
The manufacturer assumes no liability for damage resulting from non-compliance with manufacturer specifications and legal requirements, or if modifications are
made to the units.
.
Operation/handling which does not comply with
these instructions is prohibited!
In cases of non-compliance, we assume no liability
and the guarantee becomes null and void.
20
Environment und Recycling
Important information about recycling!
Only authorised service centres may come into contact
with the cooling cycle. This ensures that refrigerant
does not escape into the environment when the unit is
being repaired. Both the refrigerant and the system
parts are subject to special requirements for disposal.
The refrigerant in use is a safety refrigerant. This means
that, should damage occur, the quantities released will not
cause injury to the respiratory systems of people and animals.
Touching the liquid refrigerant can freeze the skin!
*
21
Certification for Initial Operation Date 01/2005
Initial Operation Subsequent Operation of a REMKO air-conditioning system
Unit data
Type of unit
Unit number
Refrigerant pipe length/height
Oil elevation arcs
Additional refrigerant amount
Condensation pump
Operator / Setup location Name:
Street: Postal code, Country, City:
Telephone: Fax:
Outdoor unit Indoor unit
———– m/ m
———– units
g ———–
———–
Test of cooling cycle Result
Visual check: Setup of outdoor unit and indoor unit
Heat-exchanger, insulation, pipes
Electrical fuse protection type A
Electrical power/control line Cu (mm² / mm²)
Impermeability check: Vacuum mbar
Excess pressure mbar
Add. preparation: Refrigerant refill amount g
Shut-off valves open
Functional check: Condensation flow, condensation pump(s)
Cooling mode
Operational check: Compressor mode
Fan mode
Measurement tests: Room temperature / Air outlet temperature °C / ° C
Suction temperature / Overheating °C / K
Comments:
/
/
/
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
5 good 4 poor
The room air conditioning system above was put into operation without any objections.
The operator has been trained and the operating instructions distributed.
The unit could not be put into operation for the reasons indicated above.
Executing company:
Company:
Street:
Postal code, city:
Date Operator signature
Stamp and signatu re
Signature of person assembling unit
REMKO GmbH & Co. KG
Air-Conditioning and Heating Technology
D-32791 Lage • Im Seelenkamp 12
D-32777 Lage • P.O. Box 1827
Phone: +49 52 32 606 - 0
Fax: +49 52 32 606 - 260
E-mail: export@remko.de
Internet: www.remko.de
Loading...