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Assembly instructions | LK Room Thermostat S2, 24 V NC
Note: If LK Connection box NC or LK Con-
nection Box 1 is used, follow the circuit
diagram of the product in question instead.
Removal of the thermostat back cover
1 2 4 5
24V~
Connecting LK Room Thermostat S2
1 2 4 5 11 12
24V~
Connecting LK Room Thermostat S2 EXT with option of
connecting a remote sensor
EN.33.C.149.1511
2 (4)
Temperature locking
For installation in e.g. a public environment,
locking of the thermostat's temperature setting
may be needed.
• Locking is performed by pressing buttons in
combination. Hold both buttons, i.e. "arrow
up" and "arrow down" down for approxima-
tely 20 seconds. When the function is active,
the thermostat displays "LOC" for lock, i.e.
the thermostat is locked. The room thermo-
stat will then return to displaying the current
room temperature. If someone tries to change
the temperature, the thermostat will display
"LOC" to show that the thermostat is locked.
• Unlocking is performed in the same way as
locking, i.e. hold both buttons (i.e. "arrow
up" and "arrow down") down together for
approximately 20 seconds. The room thermo-
stat shows that the function has been deac-
tivated by displaying "OPn" for open.
Text message for locked temperature setting
Unlocked temperature setting, displayed on unlocking
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