Help wiring bdr91 to baxi 600 combi boiler

[Loky11]

Hi chaps,
Could someone advise on where point A and B on a bdr91 thermostat go to which terminals on a baxi 600 combi, does a go to terminal 1 and b to terminal 2 ? Or the other way round ? Also do i need to link L to A ? Thanks.

 

[Leesparkykent]

B1 and bk2 it doesn’t matter which way round. Conventionaly you would connect bk2 to A and b1 to B.

 

[Loky11]

B1 and bk2 it doesn’t matter which way round. Conventionaly you would connect bk2 to A and b1 to B.

Thanks Lee, its currently wired A to b1 and bk2 to b, i will swap them round for peace of mind, as the boiler instructions say the 230v switched signal needs to go to terninal 1, i wasnt sure if a or b was the switch signal, do i need to put a link from L to A ? To make it 230v as such ?

 

[Leesparkykent]

No bk2 provides the 230V output and the A and B are just a normally open contact that closes when the thermostat tells it to and sends the live to b1.

Obviously you also have to power the receiver with a line and neutral.

 

[Loky11]

No bk2 provides the 230V output and the A and B are just a normally open contact that closes when the thermostat tells it to and sends the live to b1.

Obviously you also have to power the receiver with a line and neutral.

Cheers, at the moment its got live and neutral to the reciver from fuse spur, the boiler also has live,neutral and earth from fused spur as it needs permant live i believe. Then had a wire from a in reciever to b1 on boiler and another wire from b in reciever to bk2 on boiler. That sound right ? Cheers.