Hive Install to replace Danfoss two TPOne

[Jord611]

Hi All,
Kindly asking for some help.

Moved into a new build property that has an Ariston boiler and separate water tank with 2 zones (upstairs and downstairs).

Each Zone has its own Thermostat - Danfoss TPOne with only a brown (COM) and a black (NO) wire.
The TPOne is battery operated and acts as a Thermostat and Programmer hence there is no standalone programmer near the boiler.

Looking at upgrading to a Hive thermostat.

The wiring in the TPOne is just 2 wires Brown and Black. How do I install Hive receiver which requires L, N, Earth plus switch Live?
Also behind the TPOne 2 wires are not attached to anything. Grey and Earth.

Below is a picture of the wiring centre that is next to the boiler.

Thanks in advance

 

[CountryFan]

You need to work out whether those grey wires are neutral, if so, then you could utilise those either there or at the the TPone. Looks like there's a spare brown in the Wago - if it's permanent live then you can use that, it again at the TPone. Depends on where you want Hive receivers

 

[Jord611]

Looking to have the Hive receivers next to the wiring centre and then if the wires going to the Danfoss thermostats is redundant removing them

 

[CountryFan]

Ok, so you do still need to ascertain if those greys are neutral and if they are all used - if they are you need to add an additional wago.

You need to work out which is permanent live - some greys are but could also be the brown. Then you just need to alter the switch wires.

 

[Jord611]

Perfect thanks, in relation to the hot water is there anything that needs to be considered? It also has its own Danfoss module

 

[CountryFan]

If it's unvented then you may not be able to work on it, so I was told. You'd have to alter wiring for that too.

 

[Jord611]

Hey, jumping back into this just installed the hive single and dual receivers and the heating is working perfectly in both zones.

However, the hot water isn’t working, the dual receiver is powering on the hot water but there isn’t any hot water. There is a pump in hot water tank room and this doesn’t appear to be on anymore.

The dual receiver was wired up as per the wiring diagram on the hive website however, the hot water programmer previously was wired like this.

 

[CountryFan]

That looks like a heating wiring backplate. Can you show the wiring of the Hive? Did you get a dual channel?

 

[Jord611]

That last image was the wiring to the old hot water programmer.

Below is the current wiring to the dual hive receiver

 

[CountryFan]

That last image was the wiring to the old hot water programmer.

Ok, this is in the wall, have you ran new cabling?

Below is the current wiring to the dual hive receiver

You have used all terminals, the previous one used 3

 

[ericmark]

The one, two, and three channel versions of programmable thermostats may use the same back-plate, but are not wired the same, and I would not have expected terminals 1 and 2 to be connected to anything with a S Plan with two channel version only a Y Plan tends to use DHW off.

 

[Jord611]

Yes ran new cabling, 1&3 for hot water programmer on and off and 2/4 for heating on and off

Heating for both the single and dual receivers is working correctly if is only the hot water that’s an issue.

When testing the receiver manually the hot water button did fire the boiler

 

[CountryFan]

Yes ran new cabling, 1&3 for hot water programmer on and off and 2/4 for heating on and off

Unless you have a y-plan then hot water off isn't required and heating off isn't required

 

[Jord611]

How would we know if we have a y-plan? We also have the following cable in the hot water tank which seems to power the programmer, a Grundfos pump, hot water tank thermostat.

Currently the pump is coming on when the hot water is turned on/boosted from the hive app.

 

[CountryFan]

How would we know if we have a y-plan?

The type and sometimes the number of motorised valves

Currently the pump is coming on when the hot water is turned on/boosted from the hive app.

Could be an unusual setup