LK Systems S1 Assembly Instructions

LK Room Thermostat S1, 24V NC
LK Room Thermostat S1 is an electronic room
thermostat with triac output adapted to LK floor
heating systems. The room thermostat is used
together with electrothermal actuators with nor-
mally closed function (NC). LK Room Thermo-
stat S1 24V NC is available in three different de-
signs, S1, S1 EXT and S1 Dti.
S1: Base thermostat for regulating room tempera-
ture (Article no. 241 72 86).
S1 EXT: Thermostat for regulating of room tem-
perature or for e.g. regulating floor temperature
via external sensors (Article no. 241 72 90).
S1 Dti: Thermostat for regulating room tempe-
rature with hidden temperature settings for e.g.
public environment. There is also the possibility
of regulating e.g. floor temperature via external
sensors (Article 241 72 88).
Accessories
• LK Pattress S1 (Article no. 241 72 92)
• LK External Sensor S1, suitable for S1 EXT
respectively. S1 Dti (Article no. 241 72 94)
Features
• Self-modulating technology via signal pulses
for optimum energy effectiveness.
• Discrete and extremely thin thermostat de-
sign.
• Intended for direct mounting on walls, or
alternatively to electrical installation boxes.
• Connection of external temperature sensors
is possible for the models S1 EXT and S1 Dti.
• Temperature set back is possible via separate
clock (clock not included).
• Soundless thermostat function.
• Simple function control via LED.
Function description
For optimum energy efficiency the room thermo-
stat operates with so-called self-modulation tech-
nology via signal pulsing to the valve actuator.
Self-modulation technology adjusts the indicated
floor heating output in relation to the set tempe-
rature. When the room temperature reaches the
set temperature the output effect is reduced to
avoid overheating.
Assembly instructions | LK Room Thermostat S1, 24V NC
The thermostat has a green LED-indication
which is switched off when the set temperature
is reached. The indicator also functions as a refe-
rence point for the temperature scale of the ther-
mostat dial.
Temperature range for self-modulation
Temperature range for self-modulation , cycle time 10 min.
Installation
The following must be observed during assembly:
• Assembly height ca. 1.5 m above floor level.
• Assembly should preferably be carried out
on the inner wall.
• Ensure there is sufficient air circulation.
• Avoid secondary heat from other heat sour-
ces such as sunlight, lighting etc.
Electrical connection
1. Remove the thermostat dial.
2. Remove the cover via the click fastener at
the top-right hand corner of the case.
3. Carry out the electrical installation in
accordance with the connection diagram
(See below, or on the inside of the thermo-
stat lid). NB! If LK Connection Box NC or
LK Connection Box 1 is used then the con-
nection diagram for the specific product
should be used instead.
Self modulation 0%
Self modulation changing
Self modulation 100%
EN.33.C.99.1703
1 (3)