Drayton Wiser - Wiring Help

[Spook26]

Hi all,

We have just moved into our new house and had a new Worcester Greenstar 8000 Life fitted. To go with this we have purchased a Drayton Wiser Thermostat system.

We are having some issues getting it to work. The system all pairs together fine but when we turn the heating on via the thermostat or app, we get a flame come up and the HubR heating light clicks on but the boiler doesn't turn the heating on.

I have attached some photos of the wiring for the boiler and HubR/Fuse Spur. Can anyone have a look and see if it is wired correctly please? Or are we missing link somewhere?


Thanks in advance,
Luke

 

[Mister Banks]

Did you have a room stat, if so have you removed it and linked the wiring?

 

[CBW]

One of the Wago levers appears to be not fully down. Which version of Wiser did you purchase?

 

[Spook26]

Yes we have a RF card that plugged into the bottom, this has been removed. No link that I can see apart from this one the right

 

[Spook26]

One of the Wago levers appears to be not fully down. Which version of Wiser did you purchase?

Good spot I will try that too!

 

[Spook26]

Is the BUS what I need to put a link in?

 

[CBW]

Is the BUS what I need to put a link in?

No, do not put any links into that.

 

[Mister Banks]

Can you describe what system you have; S plan, Y plan or something else. What programmer and room thermostat did you have?

 

[Spook26]

I'm guessing a Y Plan as the combi boiler runs both heating and hot water, we don't have any hot water tanks etc. We currently have the standard thermostat that's comes with the worcester boiler (RF Comfort) but want to use our drayton wiser

 

[CBW]

No, if it does the 2 and no tanks, then likely a combi. If you didn’t decommission the existing thermostat and receiver then it might be looking for that one. Can you post a photo of existing thermostat?

 

[Spook26]

Yes it is a combi boiler. The existing thermostat is connected via an RF signal which is a card plugged into the boiler. Once this is disconnected, it doesn't look for the existing thermostat anymore, please see pictures below

 

[Spook26]

This is my current thermostat

 

[ian1182]

Perhaps we need to wind back a little.

After the boiler was fitted was it working ok with the Worcester thermostat? If so as part of your swap over to the Wiser what steps did you take in decommissioning the old stat?

Did you take any pictures prior to your changes?

It's a bit difficult following the wiring due the tangled collection behind what I assume is the fused spur. From first sight the spur & wiser back plate are side by side, any reason for not using more standard wire colours rather than brown, light grey & darker grey.

If you have a multimeter can you check if a voltage appears at the boiler on the black core going into the yellow block when heating is selected.

 

[Spook26]

Yes it was working fine with the worcester thermostat. There isn't anywhere to decommission the worcester thermostat, you just have to pull out the RF card like I said.

I didn't wire any of this, my electrician did when we had the house re-wired. So I cannot comment on what or how he has wired it up.

It was originally set up to use the wiser but as I said before, it wouldn't switch the boiler on when you gave it a command to do so via the app. So I looked in the worcester manual to convert it back to be able to use the worcester thermostat. This involved removing the switch wire to the yellow heating block and putting a link in so the worcester start would work again.

Please see attached drawing showing how it should be wired. Unfortunately I'm not an electrician, I'm a mechanical engineer so only know a little basic electrical but not enough in this case.

To me it looks like instead of running two cables to the boiler from hub, they have linked them together in the fuse spur to enable them to only run one to the boiler.

It states to remove both links and put the switch wire into the yellow heating block and it should work but it doesn't.

 

[Mister Banks]

The wiring looks ok so there must be a break or bad connection somewhere. As said above check for 230v on the black wire at the boiler and work backwards.