LK Systems ICS.2 User manual
1 (25)
Function
The room thermostat controls the temperature
in each room (zone) via wireless or wired signal
transmission to the receiver. The actuators for
each room/zone are operated via the receiver.
Self-modulation technique
In order for your underoor heating to be con-
trolled as energy efciently as possible, LK ICS.2
works with a self-modulation technique. The self-
modulation technique means that the ow in the
oor heating circuits is continuously optimised
based on the needs of the room and thereby pro-
vides better comfort and a more energy efcient
and environmentally smarter underoor heat-
ing system compared to systems with traditional
ON/OFF technology.
The features the system offers include the fol-
lowing:
• Self-modulation technique
• Access from internet via the LK Webserver
accessory*
• Room thermostat in high gloss white, high
gloss black or silver grey
• Adaptive week program
• Holiday function
• Logging/analysis function*
• Wired or wireless communication between
room thermostat and receiver*
• Valve exercising function
• Pump logics*
• Control of heat source*
• Fireplace function
• By-pass function
• Temperature range limits
* Applies to LK Receiver 8 ICS.2
Design
LK Room Temperature Control ICS.2 is a con-
trol system designed for LK Underoor Heat-
ing. The system is suitable for small, medium or
large building installations. LK ICS.2 has been
designed to provide high levels of comfort and
energy efcient heating systems thanks to its ad-
vanced self-modulation technique.
The system consists of LK Receiver ICS.2,
LK Room Thermostat ICS.2 and LKActuators 24 V.
Communications between the room thermostat
and the receiver can either be wireless or wired.
The receiver is available in versions for 1-channel
and 8-channels. The receiver with 1 channel can
communicatewith1roomthermostat.Thereceiver
with 8 channels can communicate with 1 to 8 room
thermostats.The receiverwith8channelscancom-
bine both wireless and wired communications.
If the system consists of more than one receiver,
the units can communicate wirelessly with each
other in order for common functions to work.
This includes controlling the circulation pump,
heat source, the ability to connect the system (LK
Webserver) to the Internet.
LK ICS.2 includes a variety of smart features such
as adaptive week programming, holiday func-
tions, re place function, the capability to connect
to an remote sensor. By using the LK Webserver
accessory, you can control your heating system
via the Internet from a mobile phone, tablet or
computer. LK ICS.2 can communicate via Mod-
bus protocol RS-485/RTU for connecting to the
property controller.
LK Room Temperature Control ICS.2
Assembly instructions | LK Room Temperature Control ICS.2
EN.33.C.152.1911
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Assembly instructions ICS.2
Requirements
The requirements for a properly functioning un-
deroor heating system is a weather-controlled
regulation system for the supply temperature
and a well implemented and documented adjust-
ment of the primary and loop ows.
Assembly of room thermostat and receiver
1. Install the receiver in vicinity of the heating
circuit manifold.
2. Install all room thermostat back plates on
the inner wall about 1.5 m above the oor.
Note which way is up, see arrow in the back
plate. Avoid locations that may affect the
room thermostat function (e.g. sun light and
ventilation).
3. For wired room thermostats, connect
2 x 0.5 mm2cable to the terminal in the
back plate marked ICS BOX. Fit the ther-
mostat cable to the green terminal that is
enclosed with the wired room thermostat.
Press the room thermostat's green terminal
block into the receiver's upper terminal
strip marked with thermostat symbols.
4. Snap the room thermostat into its back
plate.
5. Fit the actuator wire to the terminal block.
Press the actuator terminal blocks into the
receiver's lower terminal strip marked with
the valve/actuator symbol.
NOTE! Maximum of two LK Actuators per
terminal (An external terminal is required
for three actuators) and a maximum of
twelve LK Actuators per receiver 8 and ve
LK Actuators per receiver 1.
6. Run the actuator cables in the pull relief
grooves.
Room thermostat temperature mea-
surement
In order to achieve accurate room temperature
measurement it is important to prevent draft be-
hind the thermostat. If air is sucked in from an
adjacent room through the wall box or conduit,
the sensor may experience varying temperature
depending on wind direction and ventilation.
One way to avoid this is by sealing with reproof
insulation like mineral wool / glass wool.
Install the room thermostat's back plate about 1.5 m above
the oor. Note the arrow on the back plate indicating which
way is up. For the wired room thermostat, the cable is con-
nected from the receiver to the terminal marked ICS BOX.
Where necessary, the remote sensor is connected to the
EXT Sensor terminal.
1
ICS Box
1
M
L
A
1
12 34 5
32 54
2
M
1
M
BUS 3
M4
M5
M
Termostater
Ställdon
Remember to connect the wired room thermostats, if in-
stalled, to the upper terminal strip and the actuators to the
lower terminal strip.
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Assembly instructions | LK Room Temperature Control ICS.2
Thermostats
Actuators
3 (25)
Setup for room thermostats and
receivers
General
When setting up a system, the constituent receiv-
ers must be dened as the Master unit or Slave
unit depending only on the size of the system. A
network-connected system may consist of a max-
imum of one Master unit and seven Slave units.
In a system with only one receiver, this needs to
be programmed as a Master unit. On delivery, the
receivers are in Slave mode and ready to be used
in a network.
In systems consisting of multiple receiver units,
the units can communicate wirelessly with each
other in a network. The wireless network enables
common functions such as setting System Clock,
Holiday Function, By-Pass Function, Pump Con-
trol etc. to be set via the settings menu from any
room thermostat in the system. The wireless net-
work also enables all units to be controlled and
monitored over the internet using the LK Web-
server accessory.
If a network is to be established between a
number of receiver units, it is recommend-
ed that the receiver unit which will com-
prise the Master unit is positioned as cen-
trally as possible in the system. This is to
ensure that the wireless connection with all Slave
units is stable. If the distance is too long for a
stable connection to be established, the sys-
tem can be divided into separate subsystems.
Or as an alternative solution, each individual
receiver unit can be programmed as Master
unit, thereby becoming a ”stand-alone” system.
Check to ensure the antenna is connected
properly.
Power the receiver.
Setup for Master unit
Program one receiver unit as Master unit. In
systems with multiple receiver units, remember
to select a centrally positioned receiver unit as
Master unit for a stable connection with its Slave
units. Even in systems with just one receiver unit,
this unit has to be programmed as Master.
Setup as Master unit by holding the L and A
buttons until the lights for L and all channel
LEDs lights are lit with a green light. This shows
that this unit is set as the Master unit.
1
2
3
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Assembly instructions | LK Room Temperature Control ICS.2
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Conrm the setup of the Master unit by pressing
the L button once. This turns off all lights and
concludes the Master unit setup.
Remember to:
- mark the unit as Master unit on the label on
the unit's cover.
Establishing a wireless network
NB! stages 5-8 are only to be implemented in sys-
tems with multiple receiver units that are to com-
municate in a network.
Set the Master unit to setup mode by pressing
the L button until the light is solid green.
The picture shows a Slave unit that has been allocated
order number 2.
Press the L button on the optional Slave unit
until the L light turns orange.
The serial number on the Slave unit also
appears by one of the lights for channel
2 to 8 lighting green.
If you wish to verify that a receiver unit is setup as
well as its serial number on a network, see section
Checking the network under heading Troubleshoot-
ing.
Conrm the setup of the Slave unit by pressing
the L button. This turns off all lights in the Slave
unit.
Repeat steps 6 & 7 for other Slave
units if installed in the system.
Remember to:
– ensure that the Master unit's L light lights green
continuously during the setup phase for all Slave
units.
6
57
4
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Assembly instructions | LK Room Temperature Control ICS.2
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When all slave units have been programmed,
the setup is completed by pressing the
Master unit's L button once.
All the lights on the Master unit should now
turn off.
Check that all lights are off on all units to en-
sure that nothing can interfere with the contin-
ued installation of the system.
Setup of room thermostats
Prepare the system's room thermostats.
Wireless room thermostats:
Remove the plastic insulation from the battery
(marked in red circle). The room thermostat
display will show RUR.
Wired room thermostat:
Check that the room thermostat is connected to
the receiver. The room thermostat display will
show RUW.
Note: In general, the installation of the room
thermostats is the same whether it is a wireless
or wired connection to the receiver.
Hold the L button in until the L light is solid
green on the receiver that the room thermostats
are to undergo the setup process for.
This step prepares the receiver for
setup of the room thermostats.
Press and hold SET in until the display shows
MATE on the room thermostat that is to under-
go the setup process.
8
9
10
11
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Assembly instructions | LK Room Temperature Control ICS.2
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The L light changes to orange and the channel
lights change to green.
Choose the channel/channels that the room
thermostat is to control by pressing the corre-
sponding channel button (1 - 8). The selected
channels ashes green.
Channels already occupied have a solid orange
light.
Once all the required channels have nished
the setup process, you conrm by pressing the
SET button once.
The display will then show SYNC to show that
it is synchronising with the receiver (this may
take a while).
If the room thermostat takes a long time to syn-
chronise, this synchronisation process can be
sped up by pressing the SET button once.
Selected channels (actuator outputs) will be shown
in the room thermostat’s display with their channel
number (1-8).
Once synchronisation is complete, the room
thermostat shows standard mode with room
temperature and other information. This con-
rms that the setup is complete.
Worth knowing:
The channel/s (actuator outputs) for which the room
thermostat has been programmed are shown in the
display with channel number (1-8) under the room
temperature display. The display’s house symbol
shows the receiver unit for which the room thermo-
stat is programmed to with an order number (1-8).
Repeat steps 11 to 14 for each room thermostat
that must be set up for this receiver.
Ensure that the selected receiver's L light re-
mains lit for the setup of all room thermostats.
When all the room thermostats have nished
the setup process for the receiver in question,
the setup process is completed by pressing the
L button. Ensure that the L light goes out.
Repeat steps 10 to 16 for other receivers (slaves)
if installed in the system.
For settings/adjustments of the room thermo-
stat or receiver, see more under section
LK Receiver and Room Thermostat.
13
14
15
16
12
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Assembly instructions | LK Room Temperature Control ICS.2
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Remote control av LK Receiver
8 ICS.2
There are various solutions for remote control of
LK Room Temperature Control ICS.2. The vari-
ous options available for remote control of LK
Room Temperature Control ICS.2 is described
below.
Simple remote control of LK ICS.2
LK Receiver 8 ICS.2 can easily be managed by re-
motely controlled by closing its two-pole setback
contact. The simplest way to close the setback
contact is via a circuit breaker/relay or, alter-
natively, via a GSM module which is controlled
by a mobile phone. When the setback contact is
closed, the room control reduces the room tem-
perature for all room thermostats to a lower tem-
perature, the so-called setback temperature. The
preset setback temperature is 12° C, but it can
be changed in the respective room thermostat.
LK Webserver
Using the LK Webserver accessory, you can eas-
ily control your underoor heating system re-
motely via a mobile phone, tablet or computer.
The webserver's user interface is easy to manage
and provides a good overview of the underoor
heating system. Alarms, if any, are displayed via
the alarm icon, and information about the alarm
is received in plain text.
LK Webserver can also be used as a wireless com-
munications bridge. This function is used when
Internet in the property is not available at the un-
deroor heating installation's receiver. A wireless
communication can then be established between
two LK Webservers. The rst web server is in-
stalled at the underoor heating installation's re-
ceiver and the other one at the building's Internet
connection.
The web server located at the receiver will now
operate as a wireless communications bridge to
the Webserver with an Internet connection.
More information about LK Webserver is avail-
able on our website, www.lksystems.se.
Building automation
LK Room Temperature Control ICS.2 can be in-
tegrated into a building's comprehensive control
system. LK ICS.2 communicates via the Modbus
protocol RS485/RTU.
LK Room Temperature Control ICS.2 communi-
cates “point to point” with the network's BMS.
LK Systems provides on request documenta-
tion that describes the communication protocol,
which makes it possible to control/read all of the
system's features via Modbus.
Modbus ICS.2 technical data
Protocol Modbus RTU via RS-485
Modbus address of the
unit
1-247
Speed (Baud rate) 9600, 19200, 38400
Parity Odd, Even, None
Number of Stop bits 1, 2
Number of Data bits 8
Default setting is underlined
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Assembly instructions | LK Room Temperature Control ICS.2
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MEM input
The receiver is tted with a MEM input (USB type
A) that is primarily used when you need to log
into the system. Measurement data is sent to the
LK ICS MEM Stick once a minute. It is possible to
easily check/analyse the system using measure-
ment data and the LK ICS.2 Analyzer software.
1. Insert the LK ICS MEM Stick into the MEM
input.
2. Information transfer is completed when the
green U light lights continuously.
3. Remove the LK ICS MEM Stick when log-
ging is complete.
4. Transfer the information to the LK ICS.2
Analyzer to see how the measurement data
has been logged.
The LK ICS MEM Stick is an accessory that can be
ordered through LK’s retail dealers. The LK ICS.2
Analyzer can be downloaded free of charge from
LK’s website, www.lksystems.se.
The text le SYSNFO.TXT is among the informa-
tion that is saved. This le can be viewed in a
computer without special software and contains
system information that can be of assistance dur-
ing troubleshooting. Program version 2.00 pro-
vides a summary of the receiver zones as well as
help texts which interpret the signal strength to
the installed units.
Setback input
The unit is equipped with an input for centralised
temperature reduction via, for example, a GSM
Switch, which can be operated with a mobile
phone. A closed contact provides a centralised
reduction of all room thermostats in the system.
When enabled, all room thermostats show EXT in
their displays, and the temperature is lowered to
12 °C for all rooms/zones. The temperature can
be adjusted; read more in section Settings/Func-
tions.
LK Receiver 8 ICS.2
LK Receiver 8 ICS.2
Functional Description
LK Receiver 8 ICS.2 has 8 channels which means
that up to 8 LK Room Thermostats ICS.2 can be
assigned/connected to the receiver unit.
The Receiver collects data from each room ther-
mostat and sends control signals to the LK Actua-
tors. As the communication between the receiver
and actuators is via a cable, the receiver should be
placed close to the underoor heating manifold.
Switch NO/NC function
If necessary, the receiver can be adapted to cur-
rentless closed (NC) or currentless open (NO) ac-
tuators. This adjustment is done by moving the
NC/NO jumper to the correct position as shown
in the picture below.
Restart the receiver after the change.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
9 (25)
LK Receiver 8 ICS.2, overview
UL
A
1
12 374568
32 87654
230VAC
FUSE
BOILERPUMP
2
M
1
M
BUS
SETBACK
Pwr
3
M4
M5
M6
M7
M8
M
NC
T
NO
RF MEM
1
17
3
4
7
82
9 10
16 15
14 13 12
56
11
LK Receiver 8 ICS.2
No. Name Description
1 U button Used if the unit software needs updating.
2 A button Used in combination with other buttons to enable alternative functions.
3 L button Enables/disables setup mode.
4 Button 1-8 Buttons 1-8 are used to select the required channel for setup.
5 Thermostat input Thermostat input for connecting wired LK Room Thermostats ICS.2 W
(Min. cable area 2 x 0.5 mm2).
6 Actuator output For connection of LK Actuator 24V (max 2 actuators per output).
7 Power supply The unit is connected to 230 V AC via a factory-installed cable.
8 Fuse Fuse 230 V AC, T200mA. Cut the power supply before changing the fuse!
9 Pump relay Potential free relay contact for control of the circulation pump.
10 LK Relay 1 ICS.2 Potential free relay contact for control of the heat source.
11 Strain relief Groove for relief of cables.
12 Modbus connection For connection of LK Webserver or connection of BMS (min. cable area 3 x 0.5 mm2).
13 Jumpers:
Actuator type NO/NC
Modbus termination T
NOTE! Restart the receiver after changing the jumper.
- For adaptation of the unit to NO or NC actuators.
- Terminated on delivery in mode T. Disconnect the termination resistance of intermediate units
in a Modbus circuit by moving the strapping to the left.
14 Setback input A closed contact provides centralised lowering of all room thermostats in the system.
15 MEM input For logging of measurement data or updating software.
16 Antenna input For connecting the unit's antenna.
17 Antenna For communication with the wireless room thermostats and the receivers when they are con-
nected in a network. LK Antenna Cable ICS.2 allows you to extend it to 10 metres.
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Assembly instructions | LK Room Temperature Control ICS.2
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Boiler Relay
It is possible to control the system’s heat source
via the unit’s boiler relay. The relay is located un-
der the protective cover, protecting from danger-
ous voltage.
NOTE!
Cut all incoming voltage to the unit before
opening the protection cover. Remember
that the relay for pump and heat source are
powered from an external power supply
which must also be cut.
Note that the relay contact is potential-free which
means that the relay contact must be powered
from an external source (NOTE: Not from the
receiver's power supply). The relay activates the
heat source about 6 minutes after any channel
has called for heat. When the relay is enabled, the
Boiler LED lights.
See the circuit diagram below.
8
8
230VAC
FUSE
BOILERPUMP
7
M8
M
Boiler
L N
~ ~
Wiring diagram for connecting the heat source to
receiver 8.
Pump Relay
Receiver 8 has a potential-free pump relay for
controlling the system's circulation pump, for
example a pump in a shunt unit. The relay is lo-
cated under the protective cover, protecting from
dangerous voltage.
NOTE!
Cut all incoming voltage to the unit before
opening the protection cover. Remember
that the relay for pump and heat source are
powered from an external power supply
which must also be cut.
Note that the relay contact is potential-free which
means that the relay contact must be powered
from an external source (NOTE: Not from the re-
ceiver's power supply). The pump activates the
heat source about 6 minutes after any channel
has called for heat. When the relay is enabled the
Pump LED lights. The pump is run once a day
to prevent the pump from jamming during long
periods of downtime, e.g. summertime.
8
8
230VAC
FUSE
BOILERPUMP
7
M8
M
L N
~ ~
P
Wiring diagram for connecting the pump to receiver 8.
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Assembly instructions | LK Room Temperature Control ICS.2
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LK Receiver 1 ICS.2
The LK Receiver 1 ICS.2 has 1 channel which
means that maximum 1 LK Room Thermostats
ICS.2 can be assigned/connected to the unit.
The Receiver collects data from the room thermo-
stat and sends control signals to the LK Actua-
tors. As the communication between the receiver
and actuators is via a cable, the receiver should be
placed directly adjacent to the underoor heating
manifold.
No. Name Description
1 A button Used in combination with other buttons to enable alternative functions.
2 L button Enables/disables setup mode.
3 Button 1 Button 1 is used to select the required channel for setup.
4 Thermostat input Thermostat input for connecting one wired room thermostat W ICS.2
(min cable size 2 x 0.5 mm2).
5 Actuator output For connection of LK Actuator 24V (max 2 actuators per output and a total of 5 per receiver unit 1).
6 Power supply The unit is connected to 230 V AC via the enclosed external power supply.
7 Strain relief Groove for pull relief of cables.
8 Actuator type NO/NC Actuators which are connected to the unit, NO or NC actuators are selected in the top row.
(The bottom row is not used in Receiver 1)
9 Antenna input For connecting the unit's antenna.
10 Antenna For communication with the wireless room thermostats and the receivers when they are con-
nected in a network. LK Antenna Cable ICS.2 allows you to extend it to 10 metres.
Differences between Receiver 1 and 8
Model Thermostats / zones Setback input Modbus Note
Receiver 1 1 No No Indications 2-8 are not displayed
Receiver 8 1 - 8 Yes Yes
L
A
1
1
1
M1
M
1
M
PWR
NO NC
23
4
78
1
5
6
10
RF
9
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Assembly instructions | LK Room Temperature Control ICS.2
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LK Room Thermostat ICS.2
Functional Description
LK Room Thermostat ICS.2 is available as a ver-
sion where the communication between the room
thermostat and the receiver is wireless as well as
in a wired version where the communication be-
tween the room thermostat and the receiver takes
place via a two-wire cable. In order to distinguish
between the room thermostats, the wireless room
thermostat is referred to as RF and the wired ver-
sion as W.
It is possible to combine both wireless and wired
communications in LK Receiver 8 ICS.2.
The room thermostat is installed in the room/
zone it is supposed to control. The room thermo-
stat display shows the current room temperature
in the normal view. Set/required temperature is
displayed when you press the left arrow or right
arrow once. If you press again, this changes the
temperature in steps of 0.5 degrees.
The room thermostat is tted with an internal
temperature sensor that senses the room tem-
perature. It is possible to t the room thermostat
with a LK External Sensor ICS.2. The external
sensor is normally installed on the oor whereby
the room thermostat controls the oor tempera-
ture or the oor temperature in combination with
the room temperature. Read more under section
Remote sensors.
The room thermostat has a clock function that al-
lows you to lower the night temperature as part
of a week program. The program starts/stops by
default when the scheduled start/stop times oc-
cur. You can also enable the thermostat's adaptive
control, which means that the system is self-learn-
ing. Following an enabled adaptive function, the
thermostat calculates when the heat needs to
start in order to achieve the right temperature at
the required time. Temperature increases are in-
uenced by the adaptive function. Temperature
setback occurs after the programmed stop time
Read more under section Week program heading
about how the function is activated.
The LK ICS.2 has a holiday function that can be
enabled from any thermostat in the system. The
holiday function allows lowering the tempera-
ture for a longer time in an easy way, such as dur-
ing a holiday. When enabled, the function lowers
the temperature to 12 °C for all room thermostats.
Read more under section Holiday function.
If necessary, you can lock the room thermostat to
prevent unauthorised users from changing the
room thermostat settings. Read more under sec-
tion Button lock.
There is also a function that allows you to re-
strict the room thermostat setting temperature.
In apartment buildings, for example, where it
is desirable to limit the residents' room tem-
perature in a given range, such a minimum of
18 °C to max. 22 °C. Read more under section
Temperature range limits.
Description of the room thermostat functions
13
2
Left arrow = decrease value (1)
SET = conrm/access of menus (2)
Right arrow = increase value (3)
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Description of display
1
36 7
2
8
9
14 13 12 11
10
45
1. Heat on/off and MIN and MAX limit
2. Number on receiver and error code
3. Room temperature measurement enabled
4. Indicates constantly disconnected week program
5. Temperature indication
6. Setup menu
7. Holiday function
8. OFF/ON option
9. Local/general setting
10. Controlled channel/weekday
11. Operation Mode
12. Button lock symbol
13. Communication symbol*
14. Battery indicator *
* Applies to wireless communications
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Assembly instructions | LK Room Temperature Control ICS.2
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Description of the room thermostat's menus/settings
There are a number of abbreviations under the room thermostat setup menu . The table below shows the
abbreviation and its meaning.
The room thermostat setup menu is accessed by holding down the SET button until ashes, conrm
with SET. Select the required menu using the right arrow or left arrow. Conrm with SET. Adjust the re-
quired value and conrm with SET. The room thermostat will automatically return to normal operation
after about 1 minute. Alternatively, press and hold SET for 5 seconds to return to normal view. Each menu
option/function is described in detail after the table.
Abbreviation
shown in
display
Meaning Brief explanation of menu options
SET Setback, central temperature
reduction
Sets the required temperature for the system when the external actuation is
made via the SETBACK input on receiver 8. Preselected temperature 12 °C.
Holi Holiday function Sets the required temperature when holiday function is enabled. Preselected
temperature 12 °C.
WKMD Week mode, week program,
weekday/weekend
The unit's week program can be used for all days of the week (1-7) or for
weekday and weekend (1-5 and 6-7)
ECO Economy, night setback
temperature
Setts the required night setback temperature. Preselected temperature 18 °C.
COMF Comfort, normal temperature Sets the required normal temperature. Preselected temperature 20 °C.
WKEV Week events, start/stop
times for the week program
Setting the start/stop times for night setback. The unit can handle two deacti-
vations and two activations per day.
WKPG Week programs, enable/
disable
Adaptive week program. Option on or o. Default o.
SYSC System clock Sets the system time and day of the week. 1 = Monday.
Set value applies to all units in the system.
SYSD System date, system calen-
dar
Sets year, month and day.
Set value applies to all units in the system.
SENM Sensor mode, setting sen-
sors
You can specify the function of the remote sensor for the connected external
sensor. Select from only room temperature, only oor temperature, room tem-
perature combined with minimum oor temperature and room temperature in
combination with maximum oor temperature.
ADPT Adaptive function on/o Activation of adaptive start times following enabled week program. Default
o.
BKLT Backlight on/o Activation of display backlighting. Option on or o.
LOCK Button lock on / o Button lock. The buttons on the unit can be locked to prevent unauthorised
users from changing the room thermostat settings.
RFST Radio Frequency Strength
Checking of the signal
strength
Using this function it is possible to check the signal strength between a wire-
less room thermostat and the receiver.
FIPL Fire Place Function
Fire place function on/o
The function is designed to be used when a high temperature comfort is
required for the oor even though the room is heated from another source,
such as a wood burning stove.
Option on or o. Default o.
BYPS Bypass It is possible for one or more room thermostats to open their circuits when the
other room thermostats have closed theirs. The function is primarily designed
for use when the heat source comes from a heat pump. The function default
is o.
RATR Restricted allowed
temperature range
Temperature range limits
It is possible to limit the room thermostat's adjustable temperature range.
The function can be used in an apartment building, for example, where the
residents are given the opportunity to control their room temperatures within
a temperature range of, for example, 18 to 22 °C.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
15 (25)
Settings/functions
Setback (central temperature reduction)
The LK Receiver 8 ICS.2 is tted with a
setback input. Enabled contact (closed contact)
gives a temperature setback for the entire system.
The setback temperature is pre-set to 12 °C. The
temperature can be changed for individual room
thermostats as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until SET (Setback)
appears in the display, conrm with Set.
3. Select the temperature using the left /right
arrow, conrm with Set.
Repeat the above for the other room thermostats
in the system.
Holiday function – set the temperature
The room thermostat is tted with a 'holiday
function' which means that you can activate a
general temperature reduction for the system for
1-99 days from any room thermostat. The tem-
perature setback is factory pre-set to 12 °C room
temperature.
The temperature can be changed for individual
room thermostats as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until Holi (Holiday)
appears in the display, conrm with Set.
3. Set the required temperature using the
right/left arrow, conrm with Set.
Repeat the above for the other room thermostats
in the system.
NOTE!
Following an activated function, the risk of freezing must
be considered for the vulnerable zones of the underoor
heating system, such as within the garage door or other
weather exposed edge zones.
Holiday function – enable
The function is enabled from any room thermo-
stat as follows:
1. Press Set until ashes.
2. Select using the right arrow, conrm
with Set.
3. Select ON, conrm with Set.
4. Select ON/OFF using the right/left arrow,
conrm with Set.
The room thermostat now displays how many
days are left. The days count down accordingly.
When the days reach zero, the room thermostats
return to normal operation.
NOTE!
Note that the countdown starts when the activation was
made which means the countdown takes place on the
next day at the same time.
Holiday function – disable
The function is disabled from any room thermo-
stat as follows:
1. Press Set once.
2. Select OFF, conrm with Set.
3. The room thermostat switches to normal
view.
Other room thermostats automatically switch to
normal view within about ve minutes.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
16 (25)
Week program
The unit is tted with a week program. The week
program switches between either Comfort (day
temperature) or Economy (night setback). The
times for each temperature can be set as stated
in the options below. The system can also adjust
the start time to ensure that the correct tempera-
ture is reached at the right time with the adaptive
function connected (self-learning). The week pro-
gram is not activated by default on delivery.
Week program – enable
The week program is enabled, as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until WKPG (Week
Program) appears in the display, conrm
with Set.
3. Select ON/OFF using the right/left arrow,
conrm with Set.
4. Repeat the above for the other room ther-
mostats that are to follow the week pro-
gram.
NOTE!
The system clock must be set correctly for this function to
work properly.
Week program – weekday/weekend
The unit can handle either a program for all days
of the week (1-7) or a program for weekdays &
weekends (1-5/6-7).
Select the program as follows:
1. Press Set until ashes, conrm with Set.
2. Select WKMD (Week Mode) using the
right/left arrow, conrm with Set.
3. Select either 1-7 or 1-5/6-7 using the right/
left arrow, conrm with Set.
The above setting applies to the individual room
thermostat.
Week program – temperatures
The units are delivered by default with the fol-
lowing values:
Comfort = 20 °C
Economy = 18 °C
Change the temperatures, as follows:
1. Press Set until ashes, conrm with Set.
2. Select Eco for night setback temperature,
conrm with Set.
3. The temperature ashes, change the tem-
perature using the right/left arrow, conrm
with Set.
Repeat the above but select Comfort for setting the
day temperature.
NOTE!
The above setting only applies to that specic room/
thermostat. If you want the same temperature for all room
thermostats, repeat the above steps for the other room
thermostats.
Week program – start/stop times
The unit can handle two events per day, i.e. the
time the unit is to switch between day (Comfort)
and night (Economy).
Follow these steps to set the time:
1. Press Set until ashes, conrm with Set.
2. Select WKEV (Week Event) using the right/
left arrow, conrm with Set.
3. The time to start 1 of Economy ashes, set
the required time using the right/left arrow,
conrm with Set.
4. The time to stop 1 of Economy ashes, set
the required time using the right/left arrow,
conrm with Set.
5. The time to start 2 of Economy ashes, set
the required time using the right/left arrow,
conrm with Set.
6. The time to stop 2 of Economy ashes, set
the required time using the right/left arrow,
conrm with Set.
The above setting applies to the individual room
thermostat.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
17 (25)
Week program – adaptive function
The system has an adaptive function which
means that the system learns the level of thermal
inertia in the room and adjusts the start time to
ensure the temperature is reached at the required
start time (from Economy to Comfort).
The unit comes with a disabled adaptive func-
tion, the function is enabled as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until AdPt (Adaptive)
appears in the display, conrm with Set.
3. Select ON/OFF using the right/left arrow,
conrm with Set.
The function starts following the next change
from Economy to Comfort.
NOTE!
The above setting only applies to that specic room/ther-
mostat.
Week program - disconnect the program
temporarily
If you want, you can disconnect the week pro-
gram temporarily for the individual room ther-
mostat using any room thermostat. If you want,
using any room thermostat, you can disconnect
the week program temporarily for the individual
room thermostat.
The week program is temporarily disconnected,
as follows:
1. Increase/decrease the temperature using
the right/left arrow.
2. The temperature starts to ash.
3. The temporary increase/decrease is enabled
when the temperature stops ashing.
4. The display shows neither Comfort or Econ-
omy when the temporary increase/decrease
is enabled.
The temporary disconnection of the week pro-
gram disappears when the program switches be-
tween Economy/Comfort next time.
Alternatively, press Set for 5 seconds to return to
the week program.
Time & date
The unit is tted with a system clock. In order
for the week program to work, the unit's system
clock must be set. This can be done from any
room thermostat in the system. The set time ap-
plies to all room thermostats in the system.
Set the system clock, as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until SySc (System
Clock) appears in the display, conrm with
Set.
3. Hours/minutes ashes, set the time by us-
ing the right/left arrow, conrm with Set.
4. Weekday starts ashing, select using the
right/left arrow, (1 = Mon, 7 = Sun) conrm
with Set.
Set the year and date as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until SYSD (System
Date) appears in the display, conrm with Set.
3. Year ashing, set the Year by using the
right/left arrow, conrm with Set.
4. Month ashing, set the Month by using the
right/left arrow, conrm with Set.
5. Date ashing, set the Date by using the
right/left arrow, conrm with Set.
Backlight display – activation
The room thermostats have a backlit display that
lights up when you press any of the buttons. For
wireless room thermostats, the backlight is off by
default.
This function can be enabled as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until BKLT (Back
Light) appears in the display, conrm with
Set.
3. Select ON/OFF using the right/left arrow,
conrm with Set.
4. The above setting only applies to the indi-
vidual room thermostat.
NOTE!
Remember that an activated backlight aects battery life.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
18 (25)
Button lock
It is possible to lock the room thermostat buttons
to prevent unauthorised users from changing the
room thermostat settings.
The button lock is enabled as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until LOCK appears in
the display, conrm with Set.
3. Select ON/OFF using the right/left arrow,
conrm with Set. The padlock icon
appears in the display.
4. The above setting only applies to the
individual room thermostat.
When the lock is enabled, you unlock the room
thermostat as follows:
1. Press all three buttons simultaneously for at
least 20 seconds.
2. The padlock icon disappears and the room
thermostat reopens.
Checking signal strength*
Before the system is put into operation the rst
time, the signal strength should be controlled to
ensure that all room thermostats are within trans-
mission range.
Follow these steps to check the signal strength:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until RFST (Radio Sig-
nal Strength) appears in the display, conrm
with Set.
3. Read off Note the value. Read the value.
Return to the setup menu using Set.
4. Repeat points 1 to 3 for other room thermo-
stats installed in the system.
You can check the signal strength for all units si-
multaneously to save time.
* Only for thermostat-RF.
Signal strength Comment
0-20 No signal
21-40 Substandard
41-60 Weak
61-80 Good
81-100 Excellent
Fireplace function
This function is designed to be used when you re-
quire high comfort on your oor even though the
room is already heated, for example, when you
re up a wood burning stove. When this function
is enabled, it controls the room thermostat at 50 %
heat (default) to maintain heat in the oor surface.
The controlled output is adjustable from 5-100%.
The operation is time controlled over 1-99 h or is
continuously on. (default 16 hours)
Enable the function, as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until FiPL (Fire Place
Function) appears in the display, conrm
with Set.
3. Select ON/OFF using the right/left arrow,
conrm with Set.
4. 16 h (16 hours) ashes in the display. Adjust
with the right/left arrow, where needed.
Conrm with Set.
5. 50 % (controlled output) ashes in the
display. Adjust with the right/left arrow,
where needed. Conrm with Set.
When the feature is enabled, the display will switch
mode between normal view in order to subsequent-
ly display HEAT, ON, remaining time or CON for
continuous and current heat effect in percent.
When the replace function is enabled, the dis-
play switches between showing normal mode,
hours remaining (e.g. 16 h), and controlled out-
put (e.g. 50 %). When the set time has counted
down to zero, the room thermostat returns to nor-
mal operation.
An enabled re place function overrides any
potential week program. Enabled setback or ac-
tivated holiday function overrides the re place
function.
By-pass function
The By-pass function is primarily designed for use
when the heat source comes from a heat pump.
The function means that one (or more) room ther-
mostats forces open its circuit by force when the
other room thermostats close their circuits.
Depending on the required function, you can ei-
ther choose time-controlled bypass or a bypass
that is constantly activated until some other cir-
cuit opens.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
19 (25)
Time-controlled bypass keeps the bypass circuit
open for 22 minutes, then turns the circuit off.
The By-pass function is enabled as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until BYPS (Bypass)
appears in the display, conrm with Set.
3. Select ON using the right arrow, conrm
with Set. ON and the clock symbol ash
in the display indicating that the time-con-
trolled bypass has been selected. Press the
right arrow if a constant bypass is required.
The clock symbol will disappear indicating
that a constant bypass has been selected.
4. Conrm the selected function with Set.
Temperature range limits
It is possible to limit the room thermostats' adjust-
able temperature range. This function is useful
in blocks of ats, for example, where landlords
wish to restrict the ability of residents to control
the room temperature within a certain tempera-
ture range, such as 18-22 °C. If you attempt to
change the temperature outside the set tempera-
ture range, the room thermostat shows Min. and
Max. values.
The function is enabled, as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until RATR (Restricted
allowed temperature range) appears in the
display, conrm with Set.
3. The lowest temperature in the temperature
range ashes, set the required minimum
temperature using the right/left arrow, Set.
4. The highest temperature in the temperature
range ashes, set the required maximum
temperature using the right/left arrow, con-
rm with Set. The display returns to show
RATR.
5. Repeat the above for the other room ther-
mostats that are to have a restricted tem-
perature range.
External sensor – connection of remote sensor
The room thermostats can be tted with remote
sensor, for example, by controlling based on the
temperature from the oor. If necessary, the re-
mote sensor can be connected by extension cable
up to 50 metres. For extension purposes, use the
same cable area as the sensor or larger.
Note! Avoid routing in parallel with a high volt-
age installation, e.g. on a cable ladder.
The external sensor, LK External Sensor ICS/S2 is
connected as follows:
1. The external sensor is to be installed in a
protective pipe, see separate instructions
in the Remote sensor - location in different
underoor heating systems.
2. Connect the sensor to the terminal block on
the back plate of the room thermostat, the
terminal is marked EXT. SENSOR.
3. Select the function the sensor is supposed
to have, follow the instructions under the
heading Remote sensors - select function.
Remote sensors - select function
You can specify a function to apply to the room
thermostat when the remote sensor is connected.
Make the adjustment as follows:
1. Press Set until ashes, conrm with Set.
2. Press the right arrow until SENM (Sensor
Mode) appears in the display, conrm with Set.
3. The display's symbol to the left ashes.
Select from the following operating modes:
Only thermometer ashing = room temperature
only. Conrm with Set. The external sensor is in-
active.
Thermometer and MAX ashing = room tem-
perature with the oor as maximum limit. Con-
rm with Set, the unit switches to ash MAX and
the set maximum temperature. Set the maximum
temperature using the right/left arrow, conrm
with Set.
Thermometer and MAX ashing = room tem-
perature with the oor at maximum limit. Con-
rm with Set, the unit switches to ash MAX and
the set maximum temperature. Set the minimum
temperature using the right/left arrow, conrm
with Set.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
20 (25)
Floor symbol ashing = oor temperature only,
no effect from the room sensor. Conrm with Set.
The internal sensor is inactive.
Resistance table, LK External Sensor ICS.2
Temperature Resistance kΩ ± 5%
0 °C 32.66
5 °C 25.40
10 °C 19.90
15 °C 15.71
20 °C 12.49
25 °C 10.00
30 °C 8.05
35 °C 6.53
40 °C 5.32
Remote sensor placement in different under-
floor heating systems
Embedding in concrete
Before applying the concrete or screed, a con-
duit is positioned approximately 2 metres into
the room. The end of the conduit must terminate
centrally between two oor heating pipes. Seal
the end of the conduit with tape or similar so that
concrete cannot enter it. Try to position the con-
duit as high as possible in the structure, as this
will result in a more representative performance
when controlling the oor surface temperature.
Insert the remote sensor in the conduit before ap-
plying concrete or screed and connect to the ther-
mostat as described above.
LK HeatFloor 22, LK EPS 30/50/70 or
LK Silencio
Cut a slot in the upper side of the slotted board, do
not cross the oor heating pipes. Position a con-
duit in the cut slot, terminate the conduit centrally
between two heat distribution plates. Insert the re-
mote sensor in the conduit before laying the oor
and connect to the thermostat as described above.
Underfloor heating in secondary spaced boarding
Position a conduit between two heat distribu-
tion plates and secure the conduit in the edge
of the secondary spaced boarding using conduit
clamps. Insert the remote sensor in the conduit
before laying the oor and connect to the thermo-
stat as described above.
LK EPS 16
Position a conduit along the long side of the oor
heating installation so that it is pointing towards
the nearest short side. At the short side cut a jack
approximately 1 metres long in the EPS board
measured from the short side. Insert the remote
sensor in the conduit before laying the oor and
connect to the thermostat as described above.
LK Clip Rail 8/LK Clip Rail 12
Position a conduit along the long side of the oor
heating installation so that it is pointing towards
the nearest short side. At the short side, route the
conduit in the centre between two oor heating
pipes and connect as approximately 1 metres in.
Seal the end of the conduit with tape or similar
so that concrete/ooring compound cannot enter
it. Insert the remote sensor in the conduit before
applying concrete or screed and connect to the
thermostat as described above.
Battery replacement
LK Room Thermostat RF ICS.2 comes with three
1.5V batteries LR03 (AAA). The batteries have a
life expectancy of about two years. However, the
life expectancy is affected by the user's selections,
such as enabled backlight. The room thermostat
display has a battery icon showing the status of
the battery. The battery should be replaced when
the icon is only showing one segment to the right
of the icon.
Change the battery as follows:
Remove the room thermostat from the wall by
gently pushing the locking tab with a screwdriver
while you detach the room thermostat from the
back plate. (The locking tab is positioned on the
underside of the room thermostat.) Replace the
batteries and snap the room thermostat in place
again. After completing the battery replacement,
the room thermostat automatically returns to
normal operation after a short synchronisation.
EN.33.C.152.1911
Assembly instructions | LK Room Temperature Control ICS.2
Other manuals for ICS.2
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13
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