PNI CT36 PRO Manual Del Usuario página 21

and to a heating plant is performed only by qualified personnel
and only after consulting the documentation of the thermostat
and the heating plant.
The receiver unit has a relay-type command, NO (Normal Open)
and NC (Normal Closed) without potential (not energized) that
closes a control circuit with a maximum current of 10 A and a
maximum voltage of 250 V AC / DC.
You can find examples of connection with certain models of
thermal power plants at the end of the manual.
21 User manual