6
4. ELECTRICAL CONNECTION
The connection of the thermostat should in every case be left to an electrician or a certified heating
engineer. The connection should always be performed in accordance with the following. The
connection may only be made when the power supply is turned off, therefore make the relevant
circuit dead before doing any work in it and check the lack of voltage using a phase indicator/voltage
tester or a multimeter. When connecting the system in a live circuit, an electric shock may occur!
This description does not contain the general electrical installation specifications (concerning wire
stripping, putting the wire ends in sleeves, etc.). The electrical connections must always be made in
accordance with the relevant shock protection and electrical installation specifications.
1.
Phase supply. Connect the AC 230V (50 Hz) phase wire of the mains power supply here.
Attention! The cross-section of the feed wire should be dimensioned with the help of an
electrical expert based on the maximum load of the calculated heating output.
2. Neutral connection. Connect the neutral conductor of the mains supply here. (AC 230 V
dimensioned cross-section)
3. Neutral output. Connect the neutral (blue) wire of the electrical resistance based heating
element here.
4. Phase output. Connect the phase (brown) conductor of the electrical resistance based heating
element here. Attention! The heating output should not exceed the switching limit value of the
thermostat (16 A, recommended max. 14 A).
5. Earthing. Connect the conductor ensuring the shielding of the heating element here and
also here should be connected the conductor providing the protective earthing of the mains
supply. The thermostat has a double insulation, it is not necessary to earth it. Connection
point No.5 functions as a terminal ensuring the linking of the heating element and the mains
protective earth. The earthing/shielding wire of the mains protective earth and the heating
element can also be connected outside the thermostat.
6.
Sensor connection. Connect here one of the wires of the external, i.e. surface sensor that can
be used in the case of surface heating. The thermostat’s sensor is not „phase-sensitive”, the
sequence of connection is optional.
7.
Sensor connection. Connect here the other wire of the external, i.e. surface sensor that can
be used in the case of surface heating. The thermostat’s sensor is not „phase-sensitive”, the
sequence of connection is optional.
8.
The nominal voltage level of the sensor connection point between points 6 and 7 is DC 3.3 V.
WIRING DIAGRAM
EXTERNAL SENSOR
230V/AC
16A