This relay is replaced by a semiconductor relay.
The relay is pin compatible to the KACO relay and has the same size. By replacing the defective KACO relay, the system, which has a respectable efficiency, is revived.
This saves the purchase of a new controller or even heating.
The replacement of this relay has often been successfully used in practice.
The type RS75001L1-1A controls the burner of the Viessmann automatic control unit (relay K1).
This is a semiconductor relay for a max. current of 8A.
If you have problems replacing the relay, contact your local specialist or send us the control unit.
We will take care of this for you.
Schematic of Vietomatik | ![]() |