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Google nest heat link

John20
Community Member

PXL_20220926_170310186~2.jpg

Which section the black wire link to on the heat link? I am replacing a Honeywell thermostat 

@DragosC 

1 Recommended Answer

John20
Community Member

Many thanks. This worked

View Recommended Answer in original post

4 REPLIES 4

MartinJEvans
Community Member

You really should get an expert to do this for you if you can't work this out as we're talking mains electricity which could be dangerous if you get it wrong. Having said that if you are sure the live and neatral are the correct wires the final wire is probably the one telling the boiler to fire up (heat demand wire). Can't you find a label for your previous controller which shows B is the heat demand line? (perhaps you could trace it back to your boiler). If it is you need to put a loop wire from the live (L) to 2 on the heat slave and put the black wire into 3 on the heat slave. The heat slave is just a relay where 2 is the common and 3 is normally open but when heating is required the relay switches and 3 becomes live which tells your boiler to fire up.

John20
Community Member

Many thanks. This worked

Jeff
Community Specialist
Community Specialist

Hey John20,

 

I noticed that you were able to find a solution to your problem. Before I mark this as resolved, is there anything else you might need?

 

Thanks,

Jeff

Jeff
Community Specialist
Community Specialist

Hi all,

As we got our resolution here, I'm going to mark this one as resolved in the next 24 hours. Thanks to all who helped and contributed. If anyone has any other needs, please feel free to let me know before the lock.

Thanks,
Jeff