Tado Wiring /. Ecotec Pro 28

[adeelspeaks]

Hi, i am trying to set up Tado Wireless which will be replacing Danfoos Rx1. My boiler is Vailant ecotec pro 28.

I'm a little confused, as the danfoos has two wires for L and N going in. Can someone help me figure this out please.

Attaching pics for reference.

 

[stem]

Usually one set of live and neutral come in from the fused spur, and the second set will go out to the boiler. So the terminals are being used as a junction box. It's not unusual.

The two sets simply move the the live and neutral terminals at the Tado

Terminal 1 doesn't have a use according to the RX 1 wiring diagram below, so it looks to have been used in the same manner to join the earth wires.

The black and grey wires are the switching / control wires.