LK Systems Wired Room Control NC User manual

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LK Wired Room Control NC.
Valve exercise program
The connection box has a program to automati-
cally operate the actuators (and manifold valves)
daily to prevent seizure.
Pump connection
The connection box is equipped with an integra-
ted volt-free pump relay. The circulation pump
stops when all actuators are closed.
The pump restarts when any thermostat calls for
heat. There will be a slight delay with starting
and stopping. The valve exercise program will
also activate the pump.
Timers, programmers etc.
Important!
If a timer, programmer or other switch is to be
used they must be connected to the pump relay,
refer to wiring diagram below. DO NOT switch
the live on and off to the LK Connection Box,
which must be kept permanently live.
Design
LK Wired Room Control NC is used where nor-
mally closed (NC) actuators are preferred. A set
is LK Connection Box NC, LK Room Thermostat
NC and LK Actuator NC.
Room thermostats control the temperature in
each zone (e.g. room) via a signal through the
wire connection to the LK Connection Box NC
positioned next to the manifold. The manifold ac-
tuators are signalled via the connection box.
Settings/requirements
All distribution ows must be adjusted according
to the installation guide for the unit. The heat set-
tings for the control unit are regulated according
to the requirements of the heat system and the cli-
mate zone. A control zone consists of 1 LK Room
Thermostat NC that can control one or more un-
der oor heating areas each equipped with an ac-
tuator. A maximum of 5 LK Actuators NC can be
connected to 1 LK Room Thermostat NC.
LK Connection Box NC, 230/24 V AC
LK Connection Box NC.
The LK Connection Box NC comes equipped with
an integrated 230/24 V AC transformer. The box
is used for connecting and powering the LK Room
Thermostat NC and LK Actuator NC. The box
should be situated close to the manifold to avoid
extending the actuator cables. Up to 8 LK Room
Thermostats NC may be connected to the box and
up to 5 LK Actuators NC to each control zone, ho-
wever the overall total number of actuators per
box must not exceed 12. Mark the zones that con-
trol the rooms on the unit. This can be done most
conveniently on the attached labels. Each control
zone is equipped with an LED that indicates when
the room thermostat requests heat.
LK Wired Room Control NC
EN.33.C.28.0904
Assembly instructions | LK Wired Room Control NC

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EN.33.C.28.0904
Assembly instructions | LK Wired Room Control NC
LK Room Thermostat NC, 24 V AC
The LK Room Thermostat NC should be installed
indoors 1.5 m above oor level. Avoid installation
where its function might be affected (e.g. direct
sunlight, vents etc.). Lit LED indicates that the
room thermostat is requesting heat. Wiring bet-
ween the LK Room Thermostat NC and the LK
Connection Box NC should be carried out using a
cable such as a signal cable EKKX 4 x 0.5 mm² in
which case one wire remains unused. The signal
cable is connected to terminals 1, 2 and 4 on the
room thermostat and to terminals 1, 2 and 4 in the
connection box.
LK Room Thermostat NC white and LK Room Thermostat
NC Dti silver grey.
When installing in a public area, a room thermo-
stat with a concealed temperature dial may be
used namely the LK Room Thermostat Dti. The
temperature dial is then placed inside the ther-
mostat cover.
Options
An LK Remote Sensor is used when regulating
the oor temperature. The sensor is placed in the
oor (refer to special instructions attached to the
room thermostat).
An LK Protection cover protects against external
damage to the LK Room Thermostat NC. The co-
ver is made of transparent Plexiglas.
LK External Temperature Sensor
LK External Sensor i intended for usage with LK
Room Thermostat NO or LK Room Thermostat
Dti NO when the oor temperature is to be ad-
justed.
Remote switching
The LK Control is a complete unit for outdoor tem-
perature dependent ow temperature control and
adapted for LK’s shunt programs. If LK Control is
used then the volt free pump relay of LK Connec-
tion box can be connected to LK Control, connec-
tions M and H1. By connecting LK Connection box
to the LK Control, gives the function that when all
actuators on the manifold is closed, LK Control will
close its Control valve (Shunt valve) and stop the
pump. LK Control will re open the control valve
and restarts the pump when one or several actua-
tors on the manifold open. For more information
see assembly instruction for LK Control.
LK Actuator NC, 24 V AC
LK Actuator NC closes when power is cut. A “sta-
tus” indicator is located on top of the actuator.
When the indicator is “up” the valve is open.
To aid assembly to the manifold, the actuators are
supplied “open”. Once an actuator is powered
(for a minimum of 6 minutes) an internal pin is
released and the actuator will now operate.
The actuators are wired to “actuator terminals”
of the mating control zone in the control box. Ter-
minals are marked with a symbol for actuators.
The LK Connection Box NC is tted with two dif-
ferent sized terminals for actuators. The lower
terminals are marked zone 5-8, these are inten-
ded for zones with one or two (max.) actuators.
The upper terminals are marked zone 1-4 and
have larger terminals to take up to four actuators
per terminal. A total of ve LK Actuators NC may
be connected to each terminal with the aid of ex-
ternal connector.
LK Actuator NC.

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EN.33.C.28.0904
Assembly instructions | LK Wired Room Control NC
The external sensor in placed as instructed below:
Embedding in concrete
Place the sensor in a conduit approx. 2 meters
into the room before embedding in concrete. Take
into consideration that the placement is at a re-
presentative point for the area that is going to be
adjusted. The end of the sensor is to be placed
between two oor heating pipes. Seal the end of
the conduit with tape or similar to prevent con-
crete from getting into the conduit. Try to place
the conduit as high as possible since this gives
a more optimal adjustment of the oor surface
temperature. The external sensor is slipped into
the conduit before pouring the concrete and is
connected to the room thermostat as instructed
above.
LK Wood 22, LK XPS or LK Silencio
Mill a slot on the upper side of the board. Place a
conduit in the slot, end the conduit right between
two heat distribution plates. Take into conside-
ration that the placement is at a representative
point for the area that is going to be adjusted. The
external sensor is slipped into the conduit befo-
re laying the oor and is connected to the room
thermostat as instructed above.
Floor heating in secondary spaced boarding
Place a conduit right between two heat distribu-
tion plates, attach the conduit on the edge of the
secondary spaced boarding using a clip for con-
duits. Take into consideration that the placement
is at a representative point for the area that is
going to be adjusted. The external sensor is slip-
ped into the conduit before laying the oor and
is connected to the room thermostat as instructed
above.
LK EPS 16
Place a conduit along the long sides of the oor
heating installation facing the nearest short end.
Saw an approx. 2 meters long slot in the EPS-
board and place the conduit in the slot. Take
into consideration that the placement is at a re-
presentative point for the area that is going to be
adjusted. The external sensor is slipped into the
conduit before laying the oor and is connected
to the room thermostat as instructed above.
Connect the sensor as follows:
1. Remove the internal temperature sensor, as per
the gure below:
2. Connect an external temperature sensor to ter-
minal 11 and 12 (refer to circuit diagram).
Actuator
3. The supplied cable can be extended to the max.
cable length of approx. 50 metres. Use at least the
same cable area as the sensors when laying.
4. Avoid laying parallel (on cable runs) with po-
wer wiring.

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EN.33.C.28.0904
Assembly instructions | LK Wired Room Control NC
Valve
When the actuator has been disconnected the
valve function can be controlled by pressing the
spring loaded valve spindle.
Fuse
Blown fuse; please check for incorrect wiring or
shortcircuits. If programmers, timers or other
switches are used, ensure that they are connected
to the pump-relay terminal only. DO NOT switch
the live on and off to the LK Connnection Box,
which must be kept permanently live.
Technical data
LK Connection Box NC
Article no. 241 81 18
Sizes 350 x 100 x 60 mm
Primary voltage 230 V
Secondary voltage 24 V
Power supply unit capacity 40 VA
Cable protection class IP 20
Protection class 2
Primary fuse 200 mAt according
to IEC 127-2/V
Pump relay, volt-free relay 4 Amp
Max number of actuators / connection
box
12
Max number of actuators / terminals 5
Max number of thermostats / connec-
tion box
8
LK Actuator NC
Article no. 241 81 20
Sizes 44 x 47 x 53 mm
Voltage 24 V
Rated output 2,0 W
Cable protection class IP 54
Ambient temperature 0-60 grader
LK Room Thermostat NC
LK Room Thermostat NC, Article no 241 81 09
LK Room Thermostat NC Dti, Article no 241 81 23
Sizes 75 x 75 x 27 mm
Voltage 24 V
Max number of actuators / thermostats 5
Temperature range 5-30 degrees
Cable protection class IP 30
LK Clip Rail 12
Place a conduit along the long sides of the oor
heating installation facing the nearest short end.
Place the conduit at the short end between two
heating pipes and end it approx. 2 meters in. Seal
the end of the conduit with tape or similar to pre-
vent concrete from getting into the conduit. The
external sensor is slipped into the conduit before
pouring the concrete and is connected to the room
thermostat as instructed above.
Function control test
Once installation is complete a function control
test should be carried out.
Turn all the thermostats on fully and ensure1.
that all LEDs are lit up on the thermostats
and the box. Wait for approx 6 minutes
and ensure that the status indicator for the
actuators is in its highest position.
Turn down all the thermostats to minimum,2.
all the LEDs should be switched off and all
the actuators should be closed after approx
6 minutes.
Troubleshooting, room control
Connection box
The LED should light up when the thermostat is
turned on fully. If the LED does not light up en-
sure that there is a mains connection and that the
fuse for the box is intact.
Room thermostat
The LED is lit up when the room thermostat is re-
questing heat. Ensure that all wires are properly
connected. When the room thermostat is turned
on fully there should be a voltage of 24 V between
terminal 1 and 4.
Actuator
The top of the actuator is equipped with a status
indicator that indicates whether the actuator is
open or closed. When the status indicator is at the
top the actuator is open and vice versa. Actuation
time approx 6 minutes.

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EN.33.C.28.0904
Assembly instructions | LK Wired Room Control NC
Standard Wiring schematic
1 LK Connection Box NC.
2 Pump relay, max 4 Amp. (attached pull relief)
NOTE: Terminal 2 is a volt-free switch;
thus L in and L out
3 Connecting mains voltage, 230 V AC.
4 Fuse, primary, 250 V 200 mAt.
5 Connecting LK Actuator NC, 24 V AC.
6 Connecting LK Room Thermostat NC, 24 V AC.
7 LED.
8 LK Room Thermostat NC, 24 V AC.
9 Connecting to the LK Connection Box NC.
10 LK Actuator NC, 24 V
AC.
11 Status indicator.
Schematic for electric connections: LK Connection Box NC.
LN
zone
2
zone 5
14
zone
421
1
4
zone
1
6
24 21
7
4
1
zone 2
24
zone
12
3
zone
21
8
4
1
zone 4
42
200 mAT
4 A pot.-free
200 mAt
4 A pot.-free
NL
N
L
zone1
241
230 V / 24 V / 40 VA
Transformer
98927
2 1
4
ZONE 1 ZONE 2 ZONE 2ZONE 1
2
1
98927
2 1
4
1
2
1
7
23456
7
9
11
10
8
Sample connections for a zone
Terminal 1 (9) on the room thermostat is connected to terminal 1 (6) on the connection box.•
Terminal 2 (9) on the room thermostat is connected to terminal 2 (6) on the connection box.•
Terminal 4 (9) on the room thermostat is connected to terminal 4 (6) on the connection box.•
The actuator is connected to the terminals on the connection box marked with ”actuator symbol” (5) .•

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Wiring with LK Shunt, LK Zone Valve and Time Switch [if req’d].
LK Connection Box with LK Shunt
and LK 2-port Zone Valve
10 - Mar - 06
EN.33.C.28.0904
Assembly instructions | LK Wired Room Control NC