How to remove thermostat and just have timer

[Jason Franks]

Hi I have a two year old Honeywell wireless thermostat and the screen has failed. I want to remove it and the BDR91 receiver. How do I remove so that the circuit works.
Then I want to replace the original wall timer (which has been permanently ON) for water / heating with Hive (simple change as same NL1234 back plate on a condenser gravity water / pump boiler.
Problem is the wiring of the 10-way for the wireless by the tank is confusing me.
1 is L, 2 is N, 4 and 5 go to A and B in the BDR91.
Do I just short 4&5 or must I connect the Live wire to one of them?
Thank you

 

[ShaunCorbs]

best to get a heating eng/spark out

 

[Riley]

Depending on what boiler you have removing the front cover can open the combustion seal. Best to get a pro out so that you know it's all put back together properly

 

[Ric2013]

Hang on, you have a condensing boiler running on a semi-gravity system???????????????????????????????????????????????????

We can't answer you as you aren't being very specific and you're muddling me, for one. Can you not get the installation instructions for the BDR91 and see the wiring diagram? I get the impression you'll do it with or without our help, or professional assistance...

 

[ShaunCorbs]

Hang on, you have a condensing boiler running on a semi-gravity system???????????????????????????????????????????????????

We can't answer you as you aren't being very specific and you're muddling me, for one. Can you not get the installation instructions for the BDR91 and see the wiring diagram? I get the impression you'll do it with or without our help, or professional assistance...

who said he has a combi ??????

 

[Ric2013]

who said he has a combi ??????

OP said this:

'Then I want to replace the original wall timer (which has been permanently ON) for water / heating with Hive (simple change as same NL1234 back plate on a condenser gravity water / pump boiler.'

Which I thought meant he had a condensing boiler.

 

[ShaunCorbs]

OP said this:

'Then I want to replace the original wall timer (which has been permanently ON) for water / heating with Hive (simple change as same NL1234 back plate on a condenser gravity water / pump boiler.'

Which I thought meant he had a condensing boiler.

dim yn meddwl ei fod yn golygu bod ganddo wres cyddwyso yn unig boeler

 

[Riley]

Condensing boiler doesn't just mean CombI?????? What on earth do you mean ???

 

[Ric2013]

I had to Google translate that. Quicker than a dictionary. You mean you don't think that means he has a condensing system boiler, Shaun?

Just re-read what he said and now I'm totally confused. Think I can cope better with Welsh. At least I understand good morning/night and thank you.

I never said combi, I said condensing.

 

[ShaunCorbs]

I had to Google translate that. Quicker than a dictionary. You mean you don't think that means he has a condensing system boiler, Shaun?

Just re-read what he said and now I'm totally confused. Think I can cope better with Welsh. At least I understand good morning/night and thank you.

I never said combi, I said condensing.

mine came up with combi on your post im sure of it (maybe a weird glitch)

and you can have a condensing boiler on any type of system

 

[Sparkgap]

Hi I have a two year old Honeywell wireless thermostat and the screen has failed. I want to remove it and the BDR91 receiver. How do I remove so that the circuit works.
Then I want to replace the original wall timer (which has been permanently ON) for water / heating with Hive (simple change as same NL1234 back plate on a condenser gravity water / pump boiler.
Problem is the wiring of the 10-way for the wireless by the tank is confusing me.
1 is L, 2 is N, 4 and 5 go to A and B in the BDR91.
Do I just short 4&5 or must I connect the Live wire to one of them?
Thank you

Usually external controls are tied into the timeswitch/thermostat terminals. Looks like link 4 & 5 to bring it on.

 

[Worcester]

Just download the honeywell wiring diagrams, google it

 

[Ric2013]

you can have a condensing boiler on any type of system

I was wondering if the flow rate would be adequate on semi-gravity, but I guess as long as the hot water is only heated when the pump is running for the radiators, it would (just about) work.

I just wondered who would plumb in a new condensing boiler onto a semi-gravity system and not convert to fully-pumped?

 

[Worcester]

I was wondering if the flow rate would be adequate on semi-gravity, but I guess as long as the hot water is only heated when the pump is running for the radiators, it would (just about) work.

I just wondered who would plumb in a new condensing boiler onto a semi-gravity system and not convert to fully-pumped?

Probably the same person that would install a 'Hive' considering the far better alternatives that are out there. (Including Honeywell's own)