Replace Hive with Nest

[m0nonoke]

I currently have a Hive Active Heating 1 system installed that I would like to replace with a Nest Thermostat v3. I think I understand the wiring but I'd like confirmation.

The Worcester Greenstar 24Ri boiler and hot water tank are wired into the Hive receiver as per the following diagram.

IMG_5919

• m0nonoke
• 1 Jan 2017

Greenstar Ri

My understanding is N (terminal 1) and L (terminal 2) go into the Nest Heat Link N and L. Then I bridge L into the Heatlink 2 and 5 and finally Hive terminals 5 (DHW On) goes to Heatlink 6 and Hive 6 (HTG On) goes to Heatlink 3.

 

[muggles]

Sounds good to me

 

[HootingOwl]

Why not upgrade to hive v2?

 

[m0nonoke]

Why not upgrade to hive v2?

I've just moved house and there was a Hive 1 installed. I could not for the life of me get the thing to register so I could control it online and I've previously used the Nest system. The price difference between upgrading to Hive 2 or Nest was similar so I chose Nest without install because it didn't look too complicated o make the change myself.

 

[m0nonoke]

Success! Thanks everyone!

 

[m0nonoke]

Why didn't you install the heat link next to the boiler and the thermostat somewhere else?

This was the location of the original Hive receiver - I just pit the Heatlink in exactly the same place and put the Thermostat below so if could power it off the Heatlink. It's reasonably centrally located in the house so seem so ok to me.

 

[Jackrae]

And the wiring underneath the control module is unsatisfactory

 

[HootingOwl]

Now google will know when the house is occupied and when empty. Targeted telemarketing coming your way....

 

[Echo the husky]

And the wiring underneath the control module is unsatisfactory

There are rear entry knockouts on the receiver for this sort of wiring, yet for some reason, nobody ever uses them!

 

[drmsa]

I currently have a Hive Active Heating 1 system installed that I would like to replace with a Nest Thermostat v3. I think I understand the wiring but I'd like confirmation.

The Worcester Greenstar 24Ri boiler and hot water tank are wired into the Hive receiver as per the following diagram.

IMG_5919

• m0nonoke
• 1 Jan 2017

Greenstar Ri

My understanding is N (terminal 1) and L (terminal 2) go into the Nest Heat Link N and L. Then I bridge L into the Heatlink 2 and 5 and finally Hive terminals 5 (DHW On) goes to Heatlink 6 and Hive 6 (HTG On) goes to Heatlink 3.

Hi there, I would really appreciate some help of you.
I am doing something very similar at the moment as yourself for very much similar reasons as you.

Couple of questions for you.

1) I have a British Gas (branded) UT2 switch next to my boiler (downstairs) only for heating water - do you have something similar?
2) My receiver wiring is something slightly different to yours (see pic attached).
3) Could you be kind enough to take a pic of your completed wiring inside the nest receiver?
4) are you now able to control both the heating and hot water supply at your property controlled through NEST Thermostat?

 

[Echo the husky]

If your heating and hot water controls are separated like that the wiring will need to be altered quite substantially, and the new receiver wired back to the wiring centre, and the old controls removed. The controller will be able to control heating and hot water. Wiring diagrams are included in the nest instruction manual.

 

[drmsa]

Thank you for reply ECHO, very kind of you to do that.

I reckon I would rather just control the heating then with the NEST Thermostat and leave the hot water supply completely as it is.

Keeping that in mind, I could then just connect like for like from the current setup to the nest for it to all function?
i.e. N to N, L to L, 1 to 1 and 3 to 3.

 

[m0nonoke]

This looks like you have single channel receiver wiring for heating only

So from left to to right you would map this to the Nest Heatlink:
0 (blue) -> N (neutral)
1 (brown -> L (live) and also bridge to Nest terminal 2 common
2 (grey) -> make safe with some heat shrink or electrical tape
4 (black) -> call for heat (Nest terminal 3)
6 (yellow green) -> earth

 

[Echo the husky]

I disagree with the above information.

 

[drmsa]

I disagree with the above information.

Could you throw some more light into it please?