Y plan with Vaillant Ecotec plus OV430

[Stevie B]

Can Someone tell me how to wire the Vaillant ecotec OV430 with the Y Plan system. Does the orange from terminal 8 junction box go to the RT terminal on the boiler (room thermostat)

 

[leakyBYnature]

google Y plan wiring schematic, very easy to follow

 

[ShaunCorbs]

Need to be gas safe to be wire direct to the boiler