2 (3)
EN.33.C.77.2002
Assembly instructions | LK Heater 350
Installation of more than two heating circuits
In cases where more than two heating circuits are to
be connected, the LK Heater 350 can be screwed to-
gether with the LK Mini Manifold.
Note, however, that the maximum floor heating
surface for the LK Heater is 12 m
2
. The floor hea-
ting circuits that are not being supplied by the
heater are turned off via the inflow valves on the
LK Mini Manifold. For more information on perfor-
mance please contact LK Technical Support.
Troubleshooting
The floor is not warm.
• Start the control unit by pressing the
Turn-on
button and setting the water temperature.
• Check that there is current, the red light on the
Turn-on
button should be constantly lit.
• If the red light next to
Turn-on
button flashes,
this may indicate a defective electric cartridge
or a triggered overheating protection. Triggered
overheating protection is restored by removing
the current to the control box for at least 10 sec.
Note that the reason for failure should always
be investigated before restarting the system.
• Check that the pump is on.
• Check that the minishunt return valve is open
and in the case of an inflow divider that its
circuit valves are open.
• Increase the temperature until the floor heating
temperature feels comfortable.
Note! To cut power to the control unit the
cable must be unplugged.
Technical data
Article no. 241 91 18
LK Heater 1-12
Article no. 241 91 19
LK Heater 1-16
Article no. 241 91 20
LK Heater 2-12
Article no. 241 91 21
LK Heater 2-16
Power controller
360W (of which electric cartridge 350W)
Voltage
230 V AC
Frequency
50 Hz
Temperature setup
22-35 ºC
Frost protection setting
10 ºC
Temperature sensor
NTC
Enclosure class control unit
IP 44
Enclosure class cartridge
IP 54
Max. operating pressure
0,20 MPa
Opening pressure Safety valve 0,25 MPa
Operation
The system should be filled and deaerated, see
related instructions for the LK Minishunt. The
pump should be deployed.
Note! The pump should always be on to en-
sure the cooling of electric cartridge which
could otherwise become overheated.
Note! Ensure that the bleeding is done and
that the manifold with an electric cartridge
is mounted horizontally. Otherwise, electric
cartridge may become overheated.
Connect the control unit’s power cable to a groun-
ded outlet (in the case of a blackout, the set tem-
perature is stored in the controller’s memory). Set
the desired water temperature. Turn down the
minishunt thermostat to the bottom so that the
valve closes ”properly” in relation to the rest of
the heating system.
Note! The Control Unit´s power cable shall
be connected to a grounded socket power
outlet.
