Vaillant boiler and Drayton SCR

[DC45191]

Hello all

First time post so go easy.

Just had a new Vaillant EcoTec Pro 28 installed. All is fine but the Drayton SCR receiver doesn’t seem to ‘talk’ to the boiler.

The green light clicks on when demand for heat is requested but the boiler doesn’t do anything (the heating works manually)

I’ve attached the wiring photos, I’ve also removed the link wire on the SCR but again no improvement.

Any ideas?

Thank you

 

[ianmcd]

is there a timer built into the boiler ? post a pic of the boiler control panel

 

[DC45191]

All sorted thanks! Removed the red link on the 24v return and all working as it should.