Hive on Potterton Boiler

Steveuk · Jul 27, 2023

Hi all.

So I have just moved into a new house with a Potterton boiler in it. Great big thing!! lol.

I want to fit a Hive to it but it obviously doesn't have a separate standard control box to just switch over like my last one owing to the internal timer etc.

Inside the main unit is the following strip... (see photo)

Can anyone point me in the right direction of what wires will go to what in the hive box? I'll run a cable back out of the boiler and mount it on the wall.

Thanks in advance guys and girls.

ShaunCorbs · Jul 27, 2023

Right hand side yellow link wire ch r to 4 ch L to L neutral and earth left hand side to there corespondening neutral and earth etc

Need to leave the internal timer on hand / constant

Steveuk · Jul 27, 2023

ShaunCorbs said:
Right hand side yellow link wire ch r to 4 ch L to L neutral and earth left hand side to there corespondening neutral and earth etc

Need to leave the internal timer on hand / constant

Thank you. And I assume for the hot water will be the same: HW(R) ---> 3NO ?

When you say CH(L) to L, do you mean on the Boiler or the Hive? I haven't put a multimeter on it yet but assumed that the boiler CH(L) and HW(L) would be a switched live from the internal timer.

One last thing, would I be ok running the permanent Live and Neutral to the Hive unit from that Boiler rail in the picture? Or would you suggest a separate supply?

Thanks again,

ShaunCorbs · Jul 27, 2023

you want to leave the hw on all the time with a pro max

ChL boiler side live on the hive

As above as that’s your live

Steveuk · Jul 27, 2023

ShaunCorbs said:
you want to leave the hw on all the time with a pro max

ChL boiler side live on the hive

As above as that’s your live

Thanks agin for this. I'm so sorry, I've never had a boiler like this before. If you don't mind, why exactly do I want to have the HW on all the time? At the moment (according the old owner) its timed to come on once a day in the morning and holds it's heat all day. I just assumed I could use the Hive to boost it IF needed later on in the day.

ShaunCorbs · Jul 27, 2023

You could do that and you would wire it in like the heating side but I would leave it on all day tbh

Deleted member 120897 · Jul 27, 2023

If you leave the existing timer on constant then the Hive programmes times would take over. Definitely not a combi boiler?

Steveuk · Jul 27, 2023

Hi. Thanks for your reply. No it's definitely a conventional boiler with a tank underneath and an expansion vessel at the top. However, will the internal timer on the boiler have any relevance if I remove the bridges from that rail and wire it to the Hive? I would have thought that the integral timer would call for heat, but it would be going to an empty choccy block no?

Deleted member 120897 · Jul 28, 2023

Depends how the timer isn’t connected, but they’re just links, so no effect really.

Steveuk · Jul 29, 2023

So am I right in thinking that it works as per my picture below? I like to understand how it works.

Also, if I want to connect the hot water to it, also, do I need to run the HW(L) to the Hive or will the constant live from the CH(L) suffice? I assume they're both constant lives from the same source.

Basher · Jul 29, 2023

Might be of interest, - note post #7 in the thread below

Hive installation on a Potterton Powermax HE (split off another thread)

'Hive installation on a Potterton Powermax HE' I have the same boiler and looking to install Hive. Do you have to extend the wiring to be able to mount the receiver somewhere? Thanks, A

www.diynot.com

My (not researched thoroughly so read the above) understanding is that you wire the Hive L and N to the boiler supply L and N, and then the Hive programming outputs supply mains L (eg from terminal 4 to CHr etc.)

Steveuk · Jul 29, 2023

One last thing sorry... would 4 core 1mm flex be suitable for running the Hive hub?

ShaunCorbs · Jul 29, 2023

5 core or two 3 cores 0.75 or 1mm2 is fine

Steveuk · Jul 29, 2023

Basher said:
Might be of interest, - note post #7 in the thread below

Hive installation on a Potterton Powermax HE (split off another thread)

'Hive installation on a Potterton Powermax HE' I have the same boiler and looking to install Hive. Do you have to extend the wiring to be able to mount the receiver somewhere? Thanks, A

www.diynot.com

My (not researched thoroughly so read the above) understanding is that you wire the Hive L and N to the boiler supply L and N, and then the Hive programming outputs supply mains L (eg from terminal 4 to CHr etc.)

Absolutely amazing. So so helpful and well laid out answer. Thank you. I did search at the beginning but definately didn't find this post. Perfect thank you.

Just need to confirm if 1mm flex would be ok for the job?

Steveuk · Jul 29, 2023

ShaunCorbs said:
5 core or two 3 cores 0.75 or 1mm2 is fine

Perfect. Thank you.

Definitely not questioning you but where does the fifth come in?
Constant live
Constant neutral
Switched CH live
switched HW live
?? Earth? But does it need an earth as the hive box only has a 'tether' and is not earthing it?

It's only that I have some 4 core at home, if not I'll go out and get some 5.

ShaunCorbs · Jul 29, 2023

You need an earth at each appliance hence the earth point even though it’s a class 2 fitting eg all plastic exterior

Steveuk · Jul 29, 2023

ShaunCorbs said:
You need an earth at each appliance hence the earth point even though it’s a class 2 fitting eg all plastic exterior

All good. Cheers mate!!! Have a great weekend!!

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