BDR91 to Hive Active

25 Mar 2023
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United Kingdom
Hello All,

I am looking to change my Honeywell BDR91 and CM921 to an Hive Receiver and Thermostat.

Correct me if I am wrong but as I understand.
N to N
L to L
A to Common
B to 3
And My earth wire to earth tether.

What about the second L from the hive?

Would appreciate the help.
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You also have x2 N’s, so will be powering something else, like the boiler. Might want to not have as much copper exposed either. Sleeving brown if A and B are 230vac would be good practice too.
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one of the Ns are from the fused switch and other from the boiler and is connecting at the Receiver

So would just put the 2 in the same N port.

Yeah, I did think there was too much copper exposed so was planning to sleeve it.

Thanks for your help guys.
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