Radiator comes on with hot water

[frasmotic]

Hello all,

I've just had a new radiator installed and it comes on with the heating as expected but then also came on when the hot water came on without the heating.

Ours is a system boiler worcester greenstar 30cdi with an unvented cylinder. The new radiator has been hung in the w/c on the wall that backs directly onto the boiler in the garage. I have attached pictures of how it has been attached the the system.

Can anyone explain why it is coming on with the hot water and have the engineers cocked up the installation?

Thanks

 

[ShaunCorbs]

Because they’ve piped it into the boiler flow and return so any time the boiler comes on this rad will heat

 

[Ben-gee]

As Shaun says above.
Whether it’s a cock-up depends upon what was discussed and what you were told to expect.
For instance this type of set up is often done on purpose for bathroom/en-suite radiators to aid towel drying etc.
However- I suspect in your case it’s a cock-up!!
Lazy work as this was the easiest thing to do, but you should have been told this before and offered an alternative- which would have cost more, but the choice should have been given.

 

[Chuck]

I'd want one of the valves on the radiator to be a TRV.