Inverter wall mounted units in split design and
frost protection function
Operation · Technology · Spare parts
Edition GB – W11
Contents
Safety notes
Warranty
Environmental protection and recycling
Intended use
Transport and packaging
Equipment description
Operation
Decommissioning
Care and maintenance
Troubleshooting and customer service
Installation instructions for qualified personnel
Installation
Monitoring for leaks
4
4
4
4
5
5
6-12
12
12-13
14-15
15-18
18-19
20
Condensate drain
Electrical connection
Electrical connection diagram
Electrical circuit diagram
Before commissioning
Add refrigerant
Commissioning
Unit dimensions
Exploded view
Spare parts list
Performance datas
Technical data
EC-Declaration Conformity
20
20-21
21
22-23
24
24
24-25
25
26-27
26-27
28-29
30
31
Made by REMKO
Read these operating instructions carefully
before commissioning / using the device!
These instructions are an integral part of the
system and must always be kept near or on the device.
This operating manual is a translation of the German original.
Subject to modifications; No liability accepted for errors or misprints!
3
REMKO ML...DC - ARCTIC
Safety notes
Carefully read this manual before
putting commissioning the
equipment. It provides useful
tips and information as well as
hazard warnings to prevent injury
or material damage . Failure to
follow the directions in this manual
can result in endangerment to
persons, the environment and the
equipment itself and will void any
claims for liability.
■ Keep this manual and the
refrigerant datasheet near the
unit.
■ The unit may only be set up and
installed by qualified personnel.
■ The setup, connection and
operation of the unit and
its components must be in
accordance with the operating
conditions stipulated in this
manual and comply with all
applicable local regulations.
■ Mobile units must be set up
securely on suitable surfaces and
in an upright position. Stationary
units must be permanently
installed for operation.
■ Modification of equipment
and components supplied by
REMKO is not permitted and
can cause malfunctions.
■ Equipment and components
may not be operated in areas
where there is an increased
risk of damage. Observe the
minimum clearances.
■ The electrical voltage supply
is to be adapted to the
requirements of the equipment.
■ The operational safety of
equipment and components is
only assured if they are used as
intended and fully assembled.
Safety devices may not be
modified or bypassed.
4
■ Do not operate equipment
or components with obvious
defects or signs of damage.
■ All housing parts and openings,
e.g. air inlets and outlets, must
be free of foreign objects, fluids
or gases.
■ The equipment and components
must be kept an adequate
distance from flammable,
explosive, combustible,
aggressive and dirty areas or
atmospheres.
■ Touching equipment parts can
result in burns or injury.
■ Installation, repair and
maintenance work may only
be carried out by authorised
specialists. Visual inspections
and cleaning can be performed
by the operator as long as the
equipment is not under voltage.
■ Take appropriate hazard
prevention measures when
performing installation, repair or
maintenance work or cleaning
the equipment.
■ The equipment or components
are not to be exposed to any
mechanical stresses, extreme
levels of humidity or direct
sunlight.
Warranty
Prerequisite for any warranty claims
are that the purchaser or their
customer has completely filled out
the "warranty registration card"
and commissioning report included
with the unit at the time when the
equipment was purchased and first
put into operation and returned it
to REMKO GmbH & Co. KG.
The warranty conditions are
listed in the "General Business
and Delivery Conditions". Only
the contractual parties can strike
special agreements beyond these
conditions. For this reason please
first contact your direct contractual
partner.
Environmental
protection
and recycling
Disposal of packaging
All products are packed for
transport in environmentally
friendly materials. Make a valuable
contribution to reducing waste
and sustaining raw materials.
Only dispose of packaging at
approved collection points.
Disposal of equipment
and components
Only recyclable materials are used
in the manufacture of the devices
and components,
Help protect the environment
by ensuring that the devices
or components (for example
batteries) are not disposed in
household waste, but only in
accordance with local regulations
and in an environmentally safe
manner, e.g. through authorised
disposal and recycling specialists or
at collection points.
Intended use
Depending on the model, the
equipment and the additional
fittings with which it is equipped
is only intended to be used as an
air-conditioner for the purpose of
cooling or heating the air in an
enclosed room.
Different or additional use shall not
be classed as intended use. The
manufacturer/supplier assumes no
liability for damages arising from an
unintended use of the equipment.
The user bears the sole risk in such
cases.
Using the equipment as intended
also includes working in accordance with the operating manual
and installation instructions and
complying with the maintenance
requirements.
Transport and
Packaging
The equipment is shipped in
in sturdy transport packaging.
Immediately check the equipment
on delivery and make note of
any damage or missing parts
on the delivery note and inform
the forwarding agent and your
contractual partner.
No warranty can be assumed for
later claims.
Refrigerant circuit diagram for the outdoor component
The ML 262-522DC room air
conditioning units have a REMKO
ML...DC AT outdoor component as
well as an ML...DC IT indoor unit.
When in cooling mode, the
outdoor component serves to
release the heat extracted by the
indoor unit from the room being
cooled. When in heating mode,
the heat absorbed by the outdoor
component can be released by
the indoor unit into the room
being heated.In both operating
modes, the performance of the
compressor adjusts itself precisely
to the demand, thereby regulating
the target temperature with minimal
temperature fluctuations. This
"inverter-technology" results in
energy savings over conventional
split systems and also reduces noise
emissions to a particularly low level.
The outdoor component can
be installed outdoors or indoors
providing that certain requirements
are met. The indoor unit is designed
to be mounted high up on indoor
walls. Operation takes place using
an infrared remote control.
The outdoor component consists of
a refrigerant circuit with compressor,
fin condenser, condenser fan,
reverse flow valve and throttle
element. The outdoor component is
controlled via the regulation of the
indoor unit.
The indoor unit consists of a fin
vaporiser, vaporiser fan, regulation
system and condensation pan.
Floor consoles, wall consoles,
refrigerant pipes and condensation
pumps are available as accessories.
Refrigerant circuit diagram for the indoor unit
Vaporiser fan
Vaporiser
System configuration
Indoor area
Indoor unit
Condensation line
Outdoor area
Outdoor
component
Condensation line
Connection to
suction pipe
Connection to injection line
Mains cable
Control line
Injection line
Suction line
Stop valve
Condenser fan
The connection between the indoor unit and the outdoor component is
made by way of the refrigerant lines.
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REMKO ML...DC - ARCTIC
Operation
The indoor unit is easily operated using the standard infrared remote control. The indoor unit beeps to
acknowledge the correct transmission of data. If it is not possible to program the indoor unit using the remote
control, it can also be manually operated.
Manual operation
The indoor units can commissioned
manually. After the air inlet screen
has been opened, the inner
recessed button can be pressed
and automatic mode can be
activated.
In manual operation, the following
settings apply:
Cooling mode: last setting
Fan speed AUTO
Heating mode: last setting
Fan: AUTO
Press the button on the infra-red
remote control to interrupt manual
operation.
Display on indoor unit
The display illuminates according to the settings.
v
Display on indoor unit
Display
Display of coded
error messages,
Automatic mode
Defrosting
mode
room and target
temperature
Operation
Timer
Infrared remote control
The infrared remote control sends
the programmed settings over
a distance of up to 6 m to the
receiver of the indoor unit. Data
will only be received correctly if the
remote control is pointed at the
receiver and no objects obstruct
the transmission path.
First insert the batteries supplied
at delivery (2 x type AAA) into
the remote control. To do so,
remove the cover of the battery
compartment and insert the
batteries as indicated according to
their polarisation (see markings).
Max. distance 6 m
CAUTION
Faults are shown in code
(See chapter fault remedy and
customer service)
max. 6 m
NOTE
Replace discharged batteries
immediately with a new set in
order to avoid the danger of
leakage.
It is recommended that the
batteries are removed if the
equipment is shut down for
longer periods.
6
Buttons on the remote control
Buttons on the remote control
"ON/OFF" Button
Press this button
to start the unit.
"▼ " button
This button is used to
reduce the desired temperature
to as low as 17 °C.
"▲ " button
This button is used to
increase the desired
temperature
to up to 30 °C.
"MODE" button
Use this button to
select the operating mode.
The indoor unit has 4 modes:
1. Automatic mode
In this mode, the unit works in
cooling or in heating mode.
2. Cooling mode
In this mode, the warm room
air is cooled to the
desired temperature.
3. Dehumidification mode
In this mode
the room is mainly dehumidified
and the adjusted temperature is
maintained.
4. Heating mode
In this mode, the warm air in
the room is heated up to the
desired temperature.
5. Circulation mode
In this mode, the air in the
room is circulated with no
change in temperature.
"FAN" button
Press this button to set the
desired fan speed. 4 speeds
are available: Automatic, high,
medium and low fan speed.
"AIR DIRECTION" button
This button sets the desired
fin position of the exhaust
fins. Various fixed positions
and an oscillating function are
available.
Button "SLEEP"
After pressing this button,
the target temperature in
cooling mode automatically
increases by 1 °C within one
hour. In heating mode, the
target temperature is reduced
by 1 °C within one hour.
"SWING" button
This button directly activates
the oscillating function of the
fins for better air distribution in
the room.
"TIMER ON" button
This button is used to
program the time at which the
unit is automatically activated in
30 minute intervals within the
following 24 hours.
"TIMER OFF" button
This button serves to program
the automatic shut-off time
in 0.5 h intervals within the
following 24 hours.
"RESET" button
This button resets the remote
control to its factory default
configuration.
"TURBO" button
The TURBO function activates
the maximum fan speed and
the compressor.
"Lock" button
This button can be used to lock
the remote control's keys. An
unintentional adjustment can
be prevented.
"LED DISPLAY" button
This button switches the display
on and off (no influence on
unit function)
“FP” button
This button activates the “frost
protection function”, which
sets the nominal temperature
in heating mode to 6°C. This
function is used to guaranteed
frost protection in unsupervised
rooms. When the FP function
is active, the device switches
heating mode on and at 10°C
switches it off again.
This serves to ensure that
the frost protection limit is
not reached. If “FP” mode is
activated, this is indicated in the
display.
Pressing “ON/OFF”,”MODE”,
“FAN”, “TEMP ▲ ▼ “TIMER
ON/OFF”, FP” will quit the
function.
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REMKO ML...DC - ARCTIC
Remote control display
Indicator arrows will be displayed according to the settings.
Display on indoor unit
Automatic operation
Cooling mode
Dehumidifying mode
Heating mode
Fan speed
Temperature display
Button functions
A symbol is shown on the display to indicate that the settings are being transferred.
Remote control on/off
The remote control's on/off function is shown at the upper right of the
remote control by a "wind symbol".
RESET Button
ON/OFF Button
The remote control can be reset by pressing
the (counter sunk) RESET button.
Your air-conditioner is activated and deactivated by pressing the ON /
OFF button. The programmed settings and adjustment values before the
unit was turned off will appear on the display.
ON/OFFON/OFF
8
▲/▼ Buttons
Using the button, the target temperature can be adjusted up or down by
1°C. The temperature range lies between 17°C and 30°C
MODE Button
Cooling mode
▼
▼
Automatic mode
▲
▲
Use the MODE button to select between individual operating modes.
5 modes are available:
1. Automatic cooling or heating operation
2. Cooling predominant operating mode for summer
3. Dehumidifying operating mode for summer or winter
4. Heating predominant operating mode in winter
5. Circulation air circulation only
AutomaticCoolingDehumidifyingHeating
MODEMODEMODE
Air circulation
AUTOMATIC MODE
COOLING mode
In automatic mode, the controller autonomously selects between heating and cooling operation when the unit is first switched on. The control
range lies between 22 °C and 26 °C. This can be increased or decreased
with the ▲/▼ buttons. Fan speed is selected automatically.
MODE
AUTOMATIC
In cooling mode, the air in the room is cooled down to the set target
temperature. The desired room temperature is set with the ▲/▼ buttons
in 1 °C increments. If the room temperature is 0.5 °C above the selected
nominal temperature, then the interior unit starts to cool down the air
in the room. If the temperature falls to approx. 1 °C below the set room
temperature, the controller will switch off the cooling function. To protect
the compressor, the controller will not switch off the cooling again until
after a waiting period of 3 minutes.
MODE
COOLING
OPERATION
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REMKO ML...DC - ARCTIC
DEHUMIDIFICATION MODE
HEATING Mode
It is recommended that the target temperature be set to 24 ° in
dehumidifying mode. Due to the low temperature of the refrigerant, the
dew point of the air at the condenser is undercut. The excess moisture
in the air is condensed by the vaporiser, the room is dehumidified.
The fan speed is permanently set to the lowest setting in order to achieve
a maximum level of dehumidification. The compressor switches on and
off in intervals between 17°C and 24°C.
MODE
DEHUMIFICATION
MODE
In the heating mode, you can heat the room in spring or fall. The selected
room temperature is set using the ▲/▼ buttons in 1 °C increments. If
the room temperature is 1 °C below the selected target temperature, the
indoor unit starts to heat the air in the room. If the set room temperature
is exceeded by approx. 1 °C, the controller will switch off the heater
function. To protect the compressor, the controller will wait 3 minutes
before switching on the heating mode again.
MODE
HEATING
OPERATION
FAN SPEED Button
AIR DIRECTION Button
SWING Button
The fan speed can be adjusted with this button. A selection can be made
between low, medium, high and automatic fan speed.
Automatic
FAN
Speed
HighMedium
FAN
Speed
FAN
Speed
Low
FAN
Speed
The air discharge fins are individually adjusted using this button.
Various positions and an oscillating function can be selected.
The oscillating function of the air discharge fins can be adjusted with this
button. This makes it possible to switch directly between a preset position
and the oscillating function. The air distribution in the room is improved
using the swing function.
10
SLEEP Button
A programming function is activated using this button, which increases
the target temperature in cooling mode by 1 °C after one hour and by
2 °C after 2 hours. In heating mode, the target temperature is decreased
by 1 °C after one hour by 2 °C after 2 hours. The unit switches off
automatically after 8 hours.
TIMER Button
TIMER ON Button
TIMER OFF Button
The activation and switch-off time can be programmed with this button.
The timer is activated and the time display is switched off by pressing
the Timer on or Timer off button. The timer display on the indoor unit
illuminates. The desired activation or deactivation time is set by pressing
the Timer On or Timer Off buttons. When the programmed time has
been reached, the device automatically switches on or off. If the indoor
unit is automatically switched on, the mode, temperature and fan speed
for the last setting are activated. Deleting the preset on and off time early
is carried out by pressing the ON/OFF button. The timer display on the
indoor unit goes out.
Timer On
Timer On
3 sec.
“FP” Button
Timer Off
Timer Off
3 sec.
This button activates the „frost protection function“, which sets the
nominal temperature in heating mode to 8°C. This function is used to guaranteed frost protection in unsupervised rooms. When the FP function
is active, the device switches heating mode on and at 8°C switches it off
again. This serves to ensure that the frost protection limit is not reached.
If „FP“ mode is activated, this is indicated in the display.
Pressing „ON/OFF“,“MODE“, „FAN“, „TEMP ▲ ▼„TIMER ON/OFF“,
FP“ will quit the function.
MODEFP
HEATING
OPERATION
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REMKO ML...DC - ARCTIC
Manual air distribution
There are individually adjustable
fins for adjusting the horizontal air
distribution on the air discharge
side.
ATTENTION
Moving, internal parts, e.g.
fans, have the potential to
cause injury during operation!
Only make adjustments after
swing operation has been
switched off.
Manual air distribution
Decommissioning
Temporary
Decommissioning
1. Allow the indoor unit to run for
2 to 3 hours in air circulation
mode or in cooling mode at the
maximum temperature setting
in order to remove any residual
moisture from the unit.
2. Shut down the unit using the
remote control.
3. Switch off the voltage supply to
the unit.
4. Cover the unit as far as possible
with plastic foil in order to
protect it from the influences of
weather.
Permanent
Shutdown
Ensure that equipment and
components are disposed of in
accordance with local regulations,
e.g. through authorised disposal
and recycling specialists or at
collection points.
REMKO GmbH & Co. KG or your
contractual partner will be pleased
to provide a list of specialist
companies near you.
Shift lever left
Care and maintenance
Regular care and maintenance
serves to ensure trouble-free
operation and long service life of
the unit.
ATTENTION
Prior to performing any work,
ensure the equipment is
disconnected from the voltage
supply and secured to prevent
accidental switch-on!
Care
■
Ensure the indoor unit and
outdoor component are
protected against dirt, mould
and other deposits.
■
Clean the equipment using
a damp cloth. Do not use any
caustic, abrasive or solventbased cleaning products.
Do not use a jet of water.
■
Clean the fins on the indoor
unit and outdoor component
prior to long shutdown periods.
Shift lever right
Maintenance
■
We recommend
concluding a maintenance
contract with annual service
from an appropriate specialty
company.
TIP
This ensures the operational
reliability of your system!
NOTE
Statutory regulations require
an annual leak test for the
refrigerant circuit in relation to
the refrigerant filling capacity.
Inspection and documentation
is to be carried out by specialty technicians.
12
Cleaning the housing of the
indoor unit
1. Disconnect the supply voltage
to the equipment.
Type of task
Checks/Maintenance/Inspections
2. Open and fold the air inlet
guard on the front side
upwards.
3. Clean the guard and cover
using a soft, damp cloth.
4. Switch the supply voltage back on.
Air filter for indoor unit
Clean the air filter at intervals of
no more than 2 weeks. Reduce this
interval in case of heavily soiled air.
Cleaning the filter
of the indoor unit
1. Disconnect the supply voltage
to the equipment.
2. Open the front side of the
device by folding the guard
upwards and allowing it to
engage (figure 1).
3. Raise the filter and pull it out
pulling downwards.
4. Clean the filter with a standard
vacuum cleaner. Turn the dirty
side upward (figure 2).
5. Dirt can also be removed
by carefully cleaning with
lukewarm water and mild
cleaning agents. Turn the dirty
side downwards(figure 3).
General
Measure voltage and current
Check function of compressor/fans
Check fan function
Dirt on condenser/vaporiser
Check refrigerant fill quantity
Check condensation drain
Test insulation
Check moving parts
Sealing test for refrigerant circuit
1) see note
6. If water is used, let the filter dry
out before replacing it in the
unit.
7. Carefully insert the filter. Make
sure it is seated correctly.
8. Close the front side as
described above in reverse
order.
9. Switch the supply voltage back
on.
10.
Switch the unit on again.
Cleaning the condensation
pump (accessories)
An optional integrated or separate
condensation pump may be
included with the indoor unit,
which pumps out any accumulated
condensation into higher
positioned drains.
Observe the care and maintenance
instructions given in the separate
operating instruction manual.
Commissioning
Monthly
Six-monthly
Yearly
••
••
••
••
••
••
••
••
••
• •
1 Fold the guard upwards
2 Cleaning using a vacuum cleaner
3
Cleaning with lukewarm water
1)
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REMKO ML...DC - ARCTIC
Troubleshooting and customer service
The equipment and components are manufactured using state-of-the-art production methods and tested several
times to verify their correct function. If malfunctions should occur, please check the functions as detailed in the
list below. Please inform your dealer if the unit is still not working correctly after all the functional checks have
been performed!
Fault
FaultPossible causeChecksRemedial measures
The unit does not start
or switches itself off
continually
The unit does not respond
to the remote control
Power outage, undervoltage,
defective mains fuse / main switch
in off position
Damaged mains cable
Wait time after switching on is
too short
Working temperature undercut /
exceeded
Electrical surges caused by thunder
storms
Fault in external condensation
pump
Transmission distance too far /
receiver affected by interference
Defective remote control
Receiver or transmitter unit
exposed to excessive solar
radiation
Electromagnetic fields are
interfering with transmission
Button on remote control jammed
/ two buttons pressed at same
time
Batteries in remote control are flat
Are all other electrical installations
functioning correctly?
Are all other electrical installations
functioning correctly?
Have approx. 5 minutes
elapsed since the restart?
Are the fans in the indoor unit
and outdoor component working
correctly?
Have there been lightning strikes
in the area recently?
Did the pump shut down due to
a fault?
Does the indoor unit beep when
pressing a button?
Is the unit running in manual
mode?
Does it function correctly in the
shade?
Does it function after removing
potential fault sources?
Does the “Send” symbol appear
on the display?
Have new batteries been inserted?
Is the display incomplete?
Check voltage if necessary wait
until turned on again.
Repair by a specialist
Schedule longer waiting periods
Take into account the temperature
range for the indoor unit and
outdoor component
Switch off the mains protection
and switch it on again /
Have it inspected by a specialist
Check and if necessary clean the
pump
Reduce the distance to less than 6
m or change position
Replace the remote control
Place the receiver&transmitter unit
in the shade
Signal is not transmitted when
interference sources are
operational
Release the button / press only
one button
Insert new batteries
The unit is running with
reduced or without
cooling or heating output
Condensation is leaking out
14
Filter is unclean / air inlet / outlet
blocked by foreign objects
Windows and doors open.
Heating/cooling loads increased
Neither cooling nor heating mode
has been set up
Fins on outdoor component
blocked by foreign objects
Communication error between outdoor component and
indoor unit
Outdoor temp. sensor / condenser temperature fault /
short-circuited
Excessive compressor temperature protection (Klixon) has
tripped
Disconnect from mains for 2 min, check wiring
Check wiring, contact specialty company
Check wiring, check compressor wiring contact specialty company
Check voltage on the L/N/S system. Switch off and
turn on again
Check refrigerant quantity, wiring, Klixon
Check wiring, switch off and on again, contact specialty
company
Installation instructions for qualified personnel
Important notes prior to
installation
■
Transport the unit in its original
packaging as close as possible
to the installation location.
You avoid transport damages
by doing so.
■
Check the contents of the
packaging for completeness
and check the unit for visible
transport damage. Report any
damage immediately to your
contractual partner and the
shipping company.
■
Lift the unit at the corners
and not by the refrigerant or
condensation connections.
■
The refrigerant pipes (injection
and suction line), valves and
connections must be insulated
against vapour diffusion.
If necessary, also insulate the
condensation pipe.
■
Select an installation location
which allows air to freely
flow through the inlet and
outlet. (See section "Minimum
clearances").
■
Do not install the unit in
the immediate vicinity of
devices with intensive thermal
radiation. Installation near
sources of thermal radiation
reduces the output of the unit.
■
Only open the shut-off valves
of the refrigerant lines after the
installation is complete.
■
Seal off open refrigerant lines
with suitable caps or adhesive
strips to avoid infiltration of
moisture and never kink or
compress the refrigerant lines.
■
Avoid unnecessary bends.
You thereby minimize loss of
pressure in the refrigerant lines
and ensure clear return flow of
the compressor oil.
■
Take special precautions with
regard to the oil return if the
exterior component is located
above the indoor unit.
See section "Oil return flow
measures".
■
If the basic length of the
refrigerant line exceeds 5
metres, add refrigerant.
The quantity of additional
refrigerant is provided in the
chapter "Add refrigerant".
■
Only use the union nuts for the
refrigerant pipes included in the
delivery, and remove them only
shortly before connecting the
refrigerant lines.
■
Make electrical connections in
accordance with the effective
DIN and VDE standards.
■
Always fasten electric cables
properly to the electrical
terminals. Otherwise a fire
could result.
15
REMKO ML...DC - ARCTIC
Wall openings
■
A wall opening of at least
70 mm diameter and 10 mm
slope from the inside to the
outside must be made for each
indoor unit
■
We recommend that the inside
of the opening is padded or
lined, e.g. using a PVC pipe,
to prevent the lines being
damaged.
■
After installation, the wall
opening should be closed off
with a suitable sealant. Do not
use materials containing cement
or lime!
Lines in the wall throughput
Control line
Selection of the installation
location
Interior unit
The indoor unit is designed for
horizontal wall installation above
doors. However, it can also be
used on the upper wall area can
be used (min. 1.75 m above the
surface of the floor).
Outdoor component
The outdoor component is
designed for horizontal installation
on a base in outdoor areas.
It should be placed on level, flat
and firm surface. The unit should
also be secured against tipping
over. The outdoor component can
be set up outside as well as inside
a building. For external installation,
please observe the following notes
to protect the unit from weather
conditions.
Wind
If the unit is being installed in
windy areas, ensure that the
warm outlet air discharges in the
main wind direction. If this is not
the case it may be necessary to
install a windbreak (provided by
the customer). Ensure that the
windbreak does not adversely
affect the air supply to the unit.
Windbreak
Wind
PVC tube
Suction line
Condensation line
Injection line
Installation material
The indoor unit is fastened using
a wall bracket and 4 threaded screws
(provided by the customer).
The outdoor component is
attached to the wall with 4 screws
and a wall bracket or on a pedestal
secured to the ground.
Rain
The unit should be at least 10 cm
off the ground when mounted on
the roof or ground. A pedestal is
available as an accessory.
Sun
The condenser on the outdoor
component gives off heat.
Exposure to direct sunlight further
increases the temperature of the
fins and reduces the heat released
by the finned heat exchanger.
The outdoor component should
be installed on to the north
side of the building whenever
possible. If necessary, take
measures to provide sufficient
shade (responsibility of customer).
This can be accomplished with a
small roof. However, the measures
taken should not affect the flow of
warm outlet air.
Snow
The unit should be wall-mounted
in areas of heavy snowfall.
Installation should then be at least
20 cm above the expected level
of snow to prevent snow from
entering the outdoor component.
An optional wall bracket is
available as an accessory.
Minimum clearance to snow
Snow
20 cm
16
Installation inside buildings
■
Ensure that heat can dissipate
adequately when placing the
outdoor component in cellars,
attics, adjoining rooms or halls
(figure 4).
■
Install an additional fan with
a rated flow comparative to
that of the outdoor component
being installed in the room.
This is used in conjunction with
ventilation ducts to compensate
any pressure losses (figure 4)
■
Ensure a continuous and
unobstructed air flow from
outside, preferably using
sufficiently large air intakes
placed opposite each
other(figure 4).
4 Installation inside buildings
Warm air
Additional
fan
Light
well
Warm air
■
Comply with any regulations
and conditions affecting the
structure of the building.
If necessary, fit acoustic
installation.
Outdoor component
Cold
Fresh air
Light
well
Minimum clearances
Observe the minimum clearances
to allow access for maintenance
and repair work and facilitate
optimum air distribution.
ML 226 DC AT
ML 352 DC AT
ML 522 DC AT
A150 mm
B700 mm
C400 mm
D150 mm
E200 mm
Mounting points for wall bracket
ML 226-352 DC IT
Minimum clearances
120
120
1700
Air intake
Air outlet
ML 522 DC IT
120
1500
Air intake
D
A
E
Air outlet
B
All values in mm
C
270
40
45
65
790
65
90
270
65
45
70
920
65
70
17
REMKO ML...DC - ARCTIC
Installation
Oil return measures
If the outdoor component is
installed at a higher level than
the indoor unit, suitable oil return
measures must be taken. This is
normally accomplished by creating
a bend in the oil line, installed at
every 2.5 metres of rise.
Oil return measures
Outdoor component
Oil pump bend
in suction pipe to
outdoor component
1 x every 5.0
metres of rise in the
line
Radius:
min. 50 mm
max. 8/10 m
Indoor unit
Connection variations of
indoor unit
Connection variations
NOTE
Installation may only be
performed by authorised
specialists.
Unit installation
The indoor unit is attached by
means of a wall bracket, under
consideration of air discharge side
located in the lower part.
1. Mark the mounting points on
the structurally permissible
building sections according to
the dimensions of the unit.
2. Remove the housing's break
out opening if necessary.
3. Connect the refrigerant
lines, electrical cables and
condensation line to the indoor
unit as described below.
4. Hang the indoor unit onto the
wall bracket by tilting it back
slightly and then by pressing
the bottom part of the unit
against the bracket (figure 5).
5. Check that the unit is level.
Connecting the refrigerant
lines
The on-site connection of the
refrigerant lines is carried out at
the rear of the unit.
It may be necessary to fit
a reducing or extending adapter to
the indoor units. These fittings are
included with the indoor unit as an
accessory kit. Once installed, the
connections should be sealed to
prevent vapour diffusion.
ATTENTION
The units are factory filled with
dry nitrogen to monitor for
leaks. The pressurised nitrogen
is released when the union nuts
are loosened.
The following instructions describe
the installation of the refrigerant
circuit and the assembly of the
indoor unit and the outdoor
component.
1.
The required pipe diameters are
given in the table "Technical
data".
1
2
3
1 Outlet on the wall, right
2 Outlet through the wall, right
3 Outlet through the wall, left
4 Outlet on the wall, left
Wall bracket
for indoor unit
The wall bracket for the unit must
be attached with suitable screws
and anchors.
18
2. Remove the factory-fitted
protective caps and union nuts
on the connections and use
5
Connecting
4
these during installation.
3. Before flanging the refrigerant
lines, ensure that the union nut
is on the pipe.
4. Prepare the refrigerant lines as
shown below
(Page 19, figures 6+7).
5. Verify that the shape of the
flange is correct(figure 8).
6. First connect and hand-tighten
the refrigerant connections
to ensure they are correctly
seated.
7. Now fully tighten the fittings
using 2 suitably sized openended spanners. Use one
spanner to counter the force
when tightening the fitting
(figure 9).
8. Use only diffusion-tight
insulation hoses designed for
this temperature range.
9. Lay the refrigerant lines from
the indoor unit to the outdoor
component. Ensure that they
are adequately fastened and
take measures for the oil return,
if necessary!
10.
During installation, observe
guidelines on the permitted
bending radius for the
refrigerant lines and never bend
a line twice in the same place.
Brittleness and cracking can
result.
NOTE
Only use tools and components designed for refrigeration applications.
11.
Use the wall or floor brackets to
fasten the outdoor component
where structurally allowed
(refer to the installation
instructions for the brackets).
12.
Ensure that structure-borne
sound is not transferred to
the building. Use vibration
dampers to reduce the effects
of structure-borne sound!
13.
Prepare the refrigerant lines
for the outdoor component as
described above.
Supplementary information
for Installation
■
If the basic length of the
refrigerant line exceeds
5 m, add refrigerant when
commissioning the system for
the first time. (See chapter
"Add refrigerant").
6 Deburring the refrigerant line
Refrigerant line
Deburrer
8 Correct flange shape
7 Flanging the refrigerant line
Flanging tool
9 Tighten fittings
Tighten 1st Spanner
Tightening
torque:
1
4
3
8
1
Counter
2nd Spanner
2
5
8
3
4
15-20 Nm
“
33-40 Nm
“
50-60 Nm
“
65-75 Nm
“
95-105 Nm
“
19
REMKO ML...DC - ARCTIC
Monitoring for leaks
Once all the connections have
been established, the pressure
gauge station is attached as
follows to the Schrader valve (if
fitted):
red = small valve
= injection pressure
blue = large valve
= suction pressure
Once connected, perform a leak
test using dry nitrogen.
The tightness test involves
spraying a leak detection spray
onto the connections. If bubbles
are visible, the connections have
not been properly made. Tighten
the connection or prepare a new
flange.
If the leak test is successful,
depressurise the refrigerant lines
and start a vacuum pump with an
absolute final partial pressure of
min. 10 mbar to create a vacuum
in the lines. Any moisture present
in the pipes will also be removed.
ATTENTION
A vacuum of min. 20 mbar
must be created!
The time required to generate
the vacuum is dependent on the
pipework volume
of the indoor unit and the length
of the refrigerant lines. The
process will always take at least
60 minutes.
Once any foreign gases and
moisture have been completely
extracted from the system, the
valves on the pressure gauge
station will be closed and the
valves on the outdoor component
will be opened as described in the
chapter on "Commissioning".
Condensate connection
Due to undercutting of the
dew point at the vaporiser,
condensation forms during
coolingand in the condenser
duringheating.
Below the vaporiser is a collection
tray, which must be connected to
a drain.
The lower section of the outdoor
component's housing is designed
to serve as a collection tray. The
condensate connection included
in the scope of delivery is to be
attached here.
■
The condensation line is to
be installed with a minimum
slope of 2 %. (figure 10).
If necessary, fit vapour diffusion
tight insulation.
■
Lead the condensation line
freely to the run-off line. If
the condensation runs directly
into a sewer pipe, fit a trap to
prevent any unpleasant odours.
■
When operating the unit at
outdoor temperatures below
+4 °C, make sure to route
the condensation to prevent
freezing. The lower part of the
housing is also to be kept frost
free by the user, in order to
ensure permanent draining of
the condensate.
If necessary, fit supplementary
pipe heating.
■
After completed installation,
check for unobstructed
condensation run off and
ensure that a permanent seal is
provided.
10
Slope of the condensation line
at least
2% slope
The condensation hose is designed
to be installed on the left side
(viewed from the front).
Electrical connection
A mains cable must be installed as
voltage supply to the Indoor unit
and a control cable to the outdoor
unit, with appropriate safeguards.
ATTENTION
All electrical installation
work is to be performed
by specialty companies.
Disconnect the voltage supply
when connecting the electrical
terminals.
■
We recommend that a mains/
repair switch be installed near
the outdoor component.
■
If an optionally available
condensation pump is used
on the unit, then an additional
relay for the shut-off contact
of the pump will be needed to
increase the switching power to
shut off the compressor.
■
Control cables should be
screened if laid in areas exposed
to strong magnetic fields.
■
Electrical protection
is provided in accordance with
the technical data.
20
Connecting the indoor
unit
Connecting the outdoor
component
Make the connection as follows:
1. Open the air intake grill.
2. Loosen the cover to the
terminal strip on the right side.
(figure 11).
3. Connect the unit to the
control cable from the outdoor
component. See electrical
connection diagram.
4. Re-assemble the unit.
11
Connecting the indoor unit
Proceed as follows to connect the
cable:
1. Remove the plastic panel at the
connector.
2. Select the cable cross-section
according to the relevant
standards.
3. Feed both cables through the
edge protection rings on the
fixed connection panel.
4. Connect the cables as shown
on the electrical connection
diagram.
5. Anchor the cable in the strain
relief and re-assemble the unit.
(figure 12).
ATTENTION
Check all plugged and clamped
terminals to verify they are
seated correctly and make
a permanent contact. Tighten
as required.
12
Connecting the outdoor component
Control cable and
voltage supply to
the outdoor unit
Cover
Terminal strip
Electrical connection diagram
Connection ML 262 DC to ML 522 DC
Outdoor
component
L1
N
S
Indoor unitMains cable
L1
Exterior conductor
N
Neutral conductor
S
Data cable
Earth conductor
Indoor unit
230 V~,
50 Hz,
L1 / N / PE
21
N
U
V
~
~
~
~
++
-
-
Y/G
3
4
7
FILTER
HL1
LH 2
H 1N
H 2N
N
L
U
V
CN7
CN28
CN26
CN10
N-B
CN3
CN2
CN14
CN4
N
S
L
CN31
CN33
CN34
U
V
W
CN6
6
REMKO ML...DC - ARCTIC
Electrical circuit diagram
ML 262-352 DC AT
S1
C1
S2
ST
V1
C1 = Compressor
S1 = Condenser feeler
S2 = Air-intake sensor
S3 = Heated gas sensor
S4 = Compressor sensor (Klixon)
V1 = Reverse flow valve
F1 = Condenser fan
LP = Power board
ST = Control board
GL = Rectifier
After the tightness check has
been successfully completed,
connect the vacuum pump via
the pressure gauge station to
the valve connections on the
outdoor component (see chapter
"Tightness check") and create
a vacuum.
Perform the following checks
prior to putting the unit into
operation for the first time and
after any work on the refrigeration
circuit. Record the results in the
commissioning report:
■
Check all refrigerant
lines and valves using
leak detection spray or soapy
water for leaks and for
inadvertent reversal of the
suction and injection lines,
with the unit at a standstill.
■
Check refrigerant
lines and insulation for damage.
■
Check electrical
connection between
indoor unit and outdoor
component
for correct polarity.
■
Check that all fastenings,
mountings etc.
are firm and at the correct level.
ATTENTION
Make sure that the refrigerant
which is used is always filled
in liquid form!
NOTE
Check the refrigerant fill
quantity in the event of
overheating
Add refrigerant
ATTENTION
Wear protective clothing when
handling refrigerant.
The equipment contains
a basic quantity of refrigerant.
Furthermore, for refrigerant line
lengths of more than 5 metres
per circuit, an additional amount
of refrigerant must be added, in
accordance with the following
chart:
ML
ML
tity
30
g/m
ML
522
30
g/m
Basic
line length
Up to and incl.
5 m
5 m to max.
20 m
262
352
Additional fill quan-
0 g/m
30
g/m
Commissioning
NOTE
Commissioning is only to be
performed and documented
by specially trained personnel.
Once all the components have
been connected and tested, the
system can be commissioned.
A functional check should be
performed to verify its correct
function and identify any unusual
operational behaviour prior to
handing it over to the operator.
NOTE
Check that the stop valves
and valve caps are tight after
carrying out any work on
the refrigerant circuit. Use
appropriate sealant products
as necessary.
Function test and test run
Check the following points:
■
Leak tightness of refrigerant
lines.
■
Compressor and fan running
smoothly.
■
In cooling mode, cold air
output by the indoor unit, and
warm air output by the outdoor
component.
■
Functional test of the indoor
unit and all program sequences.
■
Check of the surface
temperature of the suction pipe
and determination of vaporiser
overheating. To measure
the temperature, hold the
thermometer to the suction
pipe and subtract the boiling
point temperature reading on
the pressure gauge from the
measured temperature.
■
Documentation of the
measured temperatures in the
commissioning report.
Functional test for the cooling
and heating modes
1. Remove the caps from the
valves.
2. Begin the commissioning
process by briefly opening the
shut-off valves of the external
unit until the manometer
displays a pressure of approx.
2 bar.
3. Use leak detection spray or
suitable devices to check that all
the connections are leak tight.
24
4. If no leaks are found, open
the stop valves by turning
them anti-clockwise as far as
they will turn using a hexagon
spanner. If leaks are found,
repair the faulty connection. It
is imperative that the vacuum
creation and drying steps are
repeated!
5. Switch on the mains switch or
circuit breaker.
6. Use the remote control to
switch on the unit and select
the cooling mode, maximum
fan speed and lowest target
temperature.
7. Measure and record all
the required values in the
commissioning report and
check the safety functions.
8. Check the unit's control
element using the functions
described in the chapter
"Operation".
Timer, temperature setting,
fan speeds and switching to
ventilation or dehumidifying
mode.
9. Check the correct function
of the condensation line by
pouring distilled water into the
condensation tray.
A bottle with a spout is
recommended for pouring the
water into the condensation
tray.
10.
Switch the indoor unit to
cooling mode.
11.
Check the correct function and
settings of all control and safety
devices during the test run.
12.
Check the control system in the
indoor unit using the functions
described in the operating
manual.
Timer, temperature settings and
all mode settings.
13.
Check the overheating,
outdoor, indoor, outlet and
vaporisation temperatures and
record the measured values in
the commissioning report.
14.
Switch the indoor unit to
heating mode.
15.
Check all the previously
described safety devices and
functions during the test run.
16.
Enter the measured data in the
commissioning report.
17.
Remove the pressure gauge.
Check that seals have been
fitted in the sealing caps.
Final tasks
■
Reassemble all disassembled
parts.
■
Familiarise the operator with
the system.
Unit dimensions
ML 262 DC AT to ML 352 DC AT
760
ML 522 DC AT
770
We reserve the right to modify the dimensions and constructional design as part of the ongoing technical development process.
268
270
590
590
295
530
530
ML 262 DC IT / ML 352 DC IT
790
ML 522 DC IT
290
940
275
190
275
200
All values in mm
25
REMKO ML...DC - ARCTIC
Exploded view ML 262 DC IT to ML 522 DC IT
11
7
10
9
1
6
4
8
5
12
Spare parts list
No.Designation ML 262 DC ITML 352 DC ITML 522 DC IT
From Serial number
1Complete front panel
2Air filter, set
3Board, display
4Swing motor
5Air outlet fins, set
6Condensation tray
7Vaporiser
8Fan wheel
9Fan motor
10Control board
11Transformer
12IR remote control
Spare parts (not illustrated)
Air circulation sensor
Vaporiser sensor
When ordering spare parts, please state the computerised part no., device unit number and type of device (see identification plate)!
2
3
We reserve the right to modify the dimensions and constructional
design as part of the ongoing technical development process.
802W6001...808W6001...809W6001...
111115011111501111151
111115211111521111153
111118011111821111183
111115611111561111156
111115711111571111158
111115911111591111160
111116111111621111163
111116411111641111165
111116611111661111167
111118111111811111181
111117111111711111172
111118011111801111180
111121611111741111174
111117911111751111175
26
Exploded view ML 262 DC AT to ML 522 DC AT
13
11
4
Spare parts list
12
6
5
2
3
9
8
1
10
7
No.Designation ML 262 DC ATML 352 DC ATML 522 DC AT
From Serial number
1Front panel
2Fan blade, condenser
3Fan motor, condenser
4Condenser
5Cover panel
6Side panel
7Compressor, cpl.
8Stop valve, suction line
9Stop valve, injection line
10Reverse flow valve111120811112481111249
11Control board
12Condenser, compressor
13IPM inverter power drive
Spare parts (not illustrated)
E-Box, complete
Temperature sensors, set
Electrical heater cable
802W9001...808W9001...809W9001...
111119011112301111231
111119311112321111233
111119511112341111235
111119711112361111237
111120011112381111239
111120311112401111241
111120411112421111243
111120611112441111245
111120711112461111247
111121011112501111251
111121311112521111253
1111214--
111121611112541111218
111121911112551111219
111125611112561111256
When ordering spare parts, please state the computerised part no., device number and type of device (see identification plate)!
27
REMKO ML...DC - ARCTIC
35 37 3 9432529 31 33
2. 56
2. 50
2. 38
2. 44
2. 62
2. 68
2. 74
2. 32
41 27
0. 81
0. 82
0. 83
0. 84
0. 78
0. 80
3, 2
3, 0
2. 6
2, 8
3, 4
3, 6
3, 8
2. 4
3 5 7 9 11 -7 -5 -3 -1
1
0. 78
0. 80
0. 82
0, 84
0. 72
0. 74
0. 76
4, 0
3. 4
3. 3
3. 1
3. 2
3. 5
3. 6
3. 7
3. 0
35 37 39 41 43 25 27 29 31 33
1, 07
1, 12
1, 17
1, 22
0, 92
0, 97
1, 02
4, 2
4, 0
3. 6
3, 8
4, 4
4, 6
4, 8
3. 4
3 5 7 9 1 1 -7 -5 -3 -1
1
1. 15
1. 20
1. 25
1. 30
1. 00
1. 05
1. 10
Performance data ML 262 DC
CoolingHeating
Nominal cooling outputElec. power consumption
Nominal heat output
Elec. power consumption
Outdoor temperature
Performance data ML 352 DC
CoolingHeating
Outdoor temperature
28
Nominal cooling output
Elec. power consumption
Elec. power consumptionNominal heat output
Outdoor temperatureOutdoor temperature
Performance data ML 522 DC
5. 0
4. 9
4. 7
4. 8
5. 1
5. 2
5. 3
4. 6
35 37 39 41 43 25 27 29 31 33
1. 60
1. 64
1. 68
1. 72
1. 48
1. 52
1. 56
5, 80
5. 70
5. 50
5. 60
5. 90
6. 00
6. 10
5. 40
3 5 7 9 11 -7 - 5 -3 - 1
1
1. 40
1. 50
1. 60
1. 70
1. 10
1. 20
1. 30
CoolingHeating
Nominal cooling output
Elec. power consumption
Elec. power consumptionNominal heat output
Outdoor temperatureOutdoor temperature
29
REMKO ML...DC - ARCTIC
Technical data
Series
ML 262 DC ML 352 DC ML 522 DC
Operational modeWall / room air conditioner combination for cooling and heating
Nominal cooling output
Nominal heating output
1)
2)
Energy efficiency class, cooling
Energy efficiency ratio EER
1)
Energy efficiency class, heating
Coefficient of performance COP
Serial number802W6000 -...808W6000 -...809W6000 -...
Adjustment range, room temperature°C+17 to +30
Operating range°C+16 to +31
Air flow volume per speed settingm³/h500/420/350550/450/370800/700/600
Sound pressure level per speed setting
Operating range - cooling°C+5 to +50
Operating range - heating°C-7 to +25
Air flow rate, max.m³/h170018501500/2200
Protection classIP24
Sound pressure level, max.
Depthmm270270270
Weightkg38,039,039,5
Serial number802W9000-... 808W9000-... 809W9000-...
EDP no.163226516323551632525
1) Air inlet temperature TK 27°C / FK 19°C, outdoor temperature TK 35 °C, FK 24 °C, max. air flow volume, 5m line length
2) Air inlet temperature TK 20°C, outdoor temperature TK 7°C, FK 6°C, max. air flow volume, 5m line length
3) Distance 1 m free field
4) Contains greenhouse gas according to Kyoto protocol
30
EC – Declaration of Conformity
in accordance with the Machinery Directive, Annex II 1A
Original Declaration of Conformity
We hereby declate that the devices described in the following section conform to the requirements of the specified applicable EC directives due to their design and type in the version as
marketed by us.
Name of Manufacturer: REMKO GmbH & Co. KG
Klima- und Wärmetechnik
Im Seelenkamp 12
D - 32791 Lage
Name of Authorised Agent: REMKO GmbH & Co. KG
Klima- und Wärmetechnik
Im Seelenkamp 12
D - 32791 Lage
Equipment (machinery) - Implementation: Inverter wall mounted units in split design
and frost protection function
Series / Model:
Series / Class Number: 802..., 808..., 809
Applicable regulations:
MA DIR. 2006/42/EC Machinery Directive
LV DIR. 2006/95/EC Low-Voltage Directive
EMC DIR. 2004/108 EEC Electromagnetic Compatibility Directive
EnCLB DIR. 92/75/EEC Energy Consumption Labelling Directive
EC 97/23/EC Pressure Equipment Directive
Applicable Standards:
DIN EN ISO 12100-1-2 :2004-04; DIN EN ISO 13857,
EN 14511 T1-4;
DIN 45635 - 1;
EN 378 – 1-4;
EN 55014 - 1; EN 55014 - 2; EN 55104
EN 60204 - 1; EN 60335 - 1; EN 60335 - 2 - 40;
EN 61000 - 3 - 2; EN 61000 - 3 - 3;
REMKO
ML 262DC, ML 352DC, ML 522DC
Lage, 22nd January 2010 REMKO GmbH & Co. KG
..............................................
Signature, Product Manager
31
REMKO INTERNATIONAL
… and also right in your neighbourhood!
Make use of our experience and advice
REMKO GmbH & Co. KG
Air conditioning and heating technology
Im Seelenkamp 12 D-32791 Lage
Postfach 1827 D-32777 Lage
Telephone +49 5232 606-0
Telefax +49 5232 6 06-260
E-mail info@remko.de
Website www.remko.de
Hotline
+49 5232 606-0
Export
+49 5232 606-130
Consultation
Thanks to intensive training,
our consultants are always
completely up-to-date in terms
of technical knowledge. This has
given us the reputation of being
more than just an excellent,
reliable supplier:
REMKO, a partner helping you
find solutions to your problems.
Distribution
REMKO offers not just a well
established sales network both
nationally and internationally,
but also has exceptionally highly
qualified sales specialists.
REMKO field staff are more than
just sales representatives: above
all, they must act as advisers to
our customers in air conditioning
and heating technology.
Customer service
Our equipment operates
precisely and reliably. However,
in the event of a fault, REMKO
customer service is quickly on
the scene. Our comprehensive
network of experienced dealers
always guarantees quick and
reliable service.
Subject to technical modifications, no liability assumed!
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