Assembly:
- Despite Heimeier valve (although nearly 20 years old) not a tight fit, but wackellte. Also, the support ring did not help because now the valve travel was too great, according to error code. Since I'm craftsmen it was no problem for me to cut the ring and the valve stem extension, but not Technically adept?
I'm going to buy in any case for all rooms this actuator plus HomeMatic Central