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Hi all, I would be greatful for your advice! I have a Megaflo HE and ICOS HE 24 system (4 years old), it has 2 heating zones (2 x 2 port switches (Danfos) + 2 thermostats and a 2 port honeywell switch 282848 which i believe is the motorised valve to the Megaflo coil heat exchanger . Just...

D_Hailsham, the person who installed the system used the "blue" wire as the switch live, I traced it to both ends. Your description of the wiring was "spot on" and a great help. All in order now. A big thankyou. Regards Steve

Thank you very much for your reply - it is really appreicated. I'm a little confused at the boiler end. I thought the wires come direct from the PCB (through the walls of the house) to the Thermostat mounting point. I take it this stays the same and all I do ist remove the link between L1 and...

Chaps, looking for help please! Just bought a CMT927 to control an Ideal ICOS HE 24. The wires leading to the current thermostat is 3 core + earth. I also think it is a 24 volt system. Therefore, I think I have messed up as the BDR91 requires 230V to work. My question is therefore how...