Hive receiver wiring with two sets of wires from Boiler & Fuse switch

[jasoningon]

Hii advice needed,
I am wiring in a hive receiver for my Sister on her combi boiler to replace the existing thermostat and receiver. The wiring in the first picture is how it is wired in at the moment. It appears to be wired from the boiler and the fuse switch. Would somebody please advise which terminals to use in picture 2 of the hive terminals if using both 3 core flex.
Many thanks
Jason

 

[RandomGrinch]

Would somebody please advise which terminals to use in picture 2 of the hive terminals if using both 3 core flex.

Come on, have a guess and we'll let you know if you're close!

 

[jasoningon]

On the hive terminals I put Brown to Live, Blue to Neutral on the lower core flex,
Then Earth to earth and Live to (1) common on the second core flex, but the boiler will not come on but the receiver does when paired with the thermostat ?
Should the second core live go to (3) on the hive then ?

 

[RandomGrinch]

Then Earth to earth and Live to (1) common on the second core flex, but the boiler will not come on but the receiver does when paired with the thermostat ?
Should the second core live go to (3) on the hive then ?

Close . That wire is a green/yellow wire, it isn't an 'earth', it's being used for switching for the boiler.
The twisted together brown and yellow/green wires should be connected to terminals 1 and 3 on the Hive backplate.

For the cable coming from the FCU, yes connect Blue to N and Brown to L.
The green/yellow earth cable has been cut short - this should really be connected to the earth terminal on the backplate.

 

[jasoningon]

Thanks for your help will correct it tomorrow

 

[mikewilde1985@gmail.]

I after some help if possible?! This looks similar to what I have but wanted to make sure. I think i know where to put the L and N wires but it's the other Grey wire that is confusing me as unsure what it is and where it needs to go! Help appreciated!
P.s the current reciever has a fuse switch which I am guessing this connect to??

 

[stem]

It's impossible to say without tracing the grey wire back to find out what's on the other end of it. Heating systems are like people, all different

However, assuming the wiring worked correctly with the BDR91 connected, provided you keep the same configuration as it is now, it will work with the Hive. The BDR91 is a simple on/off switch and so is the Hive. From an electrical point of view they do exactly the same thing and you are swapping like for like.

So to install a single channel Hive keep the wires exactly as they are. As there are two blue wires make sure you mark which is which, it wouldn't be good if you got them transposed.

BDR91 N = Hive N (blue)
BDR91 L = Hive L (brown)
BDR91 A = Hive 1 COM (brown)
BDR91 B = Hive 3 HTG ON (blue & grey)

I see you are new to the forum so for future reference you should have started your own new thread. Tacking yours on to someone else's is known as Hijacking and is against forum rule 6.

 

[mikewilde1985@gmail.]

Hi thanks for the very detailed reply and advice, as far as hijacking! I wasn't aware, as you mentioned it's my first post. In other platforms you get killed for asking a new similar question and get told to essentially hijack someone else's post so not to repeat similar questions but will be sure to start a new thread going forwards!