Wire up frost star to Ideal combo 30

[Treacle Tart]

I have an ideal combi 30 boiler and I want to install a frost stat Drayton.

I am confused by the wiring because I believe the boiler has no voltage contacts yet all frost stats have 230v. The boiler has two contacts yet the stat has only one switch wire. So confused how to wire up and concerned for sending 240v to the boiler from the stat.
Can anyone advise please? Step by step

 

[ShaunCorbs]

That boiler is 240v controls but you need to be gas safe to wire it inside the boiler sorry