I have just had a Keston C55 fitted by a heating engineer. He has used just the zone 2 potentiometer (DHW?) to control the heat for the whole system. Keston tell me this is a non-modulating control and the zone 1 is the one that is modulating (i.e. I have a modulating boiler which is not modulating!). There is no information in the literature about this. Anybody have any information, please?
Also, with 1 set of flow and return coming from the boiler, how does the boiler provide different heats to CH and DHW, or know which is which? The pipework follows the correct layout for a sealed system, but the electrical circuit diagrams are not too helpful.
Also, with 1 set of flow and return coming from the boiler, how does the boiler provide different heats to CH and DHW, or know which is which? The pipework follows the correct layout for a sealed system, but the electrical circuit diagrams are not too helpful.