Another nest 3 installation question

[james4204]

Hi, i have a vaillant combi boiler that connects to a Danfoss 103e5 timer switch, with no thermostats.
I can not find on the boiler anywhere the model number.

I have pulled apart the 103e5 and it has 5 wires, live, earth, neutral for power and two wires for the switch pin 1 is output and pin 3 is com. I've attached a photo of this.

When connecting to the nest I assume just use the live and neutral and ignore the earth. But I don't know if I have a low volt or 230v system.

Do I just wire the two wires across the common and normally open on the nest?

Thanks

 

[stem]

Keep the two switching wires separate as they are now, and wire to Nest terminals 2 and 3 ('Common' and 'Heating On') the contacts are potential free, so as long as you don't link them to anything else, the voltage doesn't matter.