Connecting a Honeywell BDR91 Relay Box to a Baxi 105 HE

[Jackal6]

Hello,

I have a Baxi 105 HE combi boiler which is currently controlled by a Drayton LP522 programmable controller. I have a Honeywell CM927 wireless thermostat and a BDR91 relay which I want to fit.
I am looking for some advice on how to wire the Honeywell BDR91 relay into the boiler please.

Here are some picture of the electrical connections inside the boiler:




These are the instructions on the front of the boiler:


Here is a picture of the BDR91 relay box:



Would I connect it by running a feed off the live and neutral from the boiler to the L and N terminals on the BDR91 relay box and then wire terminal 1 on the boiler to A on the BDR91 and terminal 2 on the boiler to B on the BDR91?

Here are links to the instructions for the boiler:
http://www.plumbcenter.co.uk/wcssto...ng.all/ti/on/Baxi_Combi105HE_Installation.pdf

Here are the instrucitons for the Honeywell BDR91 Relay Box:
http://www.honeywelluk.com/Documents/Installation-Guide/pdf/1069.pdf

Thank you for any help.

 

[Dan Robinson]

Yes... but use the left L on the BDR.

 

[Dan Robinson]

You could also run a wire from 1 to the left L, then link the right L with A then B to 2.

This would ensure that the BDR was powered from the boiler and had no outside influence.


But I have been drinking....

 

[Jackal6]

Thanks for the help, I just wanted to check I was connecting the relay correctly before I start.