Its a pity this thread died a few months ago. Also odd Alex did not get involved over the 2% Sedbuk.
I found what I needed as instructions on the Cylinder Demand unit.
Perhaps someone could confirm my expectation that if the relay in this unit identifies a HW demand then joining the two pins on the X21 its connected to then cause the boiler to ignore the external weather sensor and then to run at maximum temp?
Obviously that is not going to be the best temp for maxum efficiency.
I have a suspicion that I am going to produce my own unit to C/O the external sensor to a preset which will give about 70 C to the HW. Any coments on this?
Tony
I found what I needed as instructions on the Cylinder Demand unit.
Perhaps someone could confirm my expectation that if the relay in this unit identifies a HW demand then joining the two pins on the X21 its connected to then cause the boiler to ignore the external weather sensor and then to run at maximum temp?
Obviously that is not going to be the best temp for maxum efficiency.
I have a suspicion that I am going to produce my own unit to C/O the external sensor to a preset which will give about 70 C to the HW. Any coments on this?
Tony