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I essentialy have the same problem

i checked all the resistances everything seems to be working fine but now i got a mail from biasi saying i cant connect a 240V thermostat to this model could this be true?

Yea i guess i cant solve this one on my own

now when i cranck up the heat above the set one the boiler starts but when i lower the heat below the set one it doesnt go off

well now i wired it corectly and the thing still doesnt work

Thx again for taking your time i realized that i wired wrong in the thermosta itself

never mind i figured it out i feel a bit dumb now though thanks for the help i realized the mistake

http://www.diynot.com/network/stefko27/albums/ here i posted a new image how it looked like without the grey one and the black one

yes that i understood but when i opened the boiler, 1 was connected to neutral and 3 went to pcb now i dont know where to wire 1 on pcb or i leave the 1 empty i think it has to go somwhere.

good to know :) but as to reading the manual i actualy cant find(or i m going blind) how to conect the external terminal to the pcb

ok now i m reading a different manual and it actualy says what you wrote so i guess i was wrong then this means that i have to rewire everything?

HMMM it was wired like that with an old thermostat and it worked fine as for the manual if i check at the diagram the blue wire as i understand as the neutral comes out of electric suply to external control correct me if i m wrong

http://www.diynot.com/network/stefko27/albums/ this is how i wired the thermostat[/img][/b]

also the boiler is working and heating ok but i need to manualy turn it on and of

Yes I had the same thoughts but i dont think it could be wrong Line on L neutral on N , Line on com and return to boiler on the remaining output could that be wrong

Actualy now I did some questioning and found out that last night some of my roommates turned on the thermostat but the radiator in their room was closed so could that have any influence

Hello i have a problem with Biasi I recently changed the external thermostat and it was working fine till yesterday it is now not working according to thermostat also the first two lights flash the green and the red one which in manual it says frost protect operation. any ideas?