Wiring a relay to protect a programmer help.

[Lee Edwards]

Hi. I hope you are all well.

I have installed a Tado v3+ receiver in my house for just over 1year. Around 3 weeks ago, the heating would just stay on always without any demand. As this was under warranty, tado sent a replacement and after 3 weeks it has done the same. The relay has fused closed in central heating mode.

Tado are going to send another one but said I need to install a relay to stop the pump fusing the contact in the receiver. Now, they have sent an image so please find attached. What I need help with is where to install it. Can it be installed in the wiring centre? It is a Y plan set up.

Any help would be fab.

Regards Lee

 

[oldbuffer]

1. Most inductive loads have a heavy current surge when the voltage is first applied. Don't understand why Tado should think this is unusual.
2. Unfortunateley I can't see the connections clearly in your attached image. I bigger image of the wiring diagram would be helpful, together with an explanation of where the brown and blue leads not attached to the relay come from.
3. Have they advised you of what "protective" relay is required?
4. I find it hard to see how a relay can offer protection other than switching the pump itself.

 

[CountryFan]

I can’t see how a pump would fuse contacts as it’s the Tado and motorised valve that carry out the switching, not the pump.

 

[endecotp]

What I need help with is where to install it.

Anywhere that is convenient, where it will physically fit, and where it is safe to do so. In particular the relay in their photo has exposed (live) screw terminals, so that needs to be in an enclosure of some sort.

Have they advised on a specific relay? What is the rating of its contacts?