Urgent PLEASE!!! Clock/Thermostat wiring

[belgiumboy]

Hi All

Complete idiot here so be gentle with me

I've got a Ben Clock/thermostat ram 812 to fit onto my heating system, the old thermostat was a Landis & Gyr RAV 10. Previously removed (helpful)

I got 3 wires coming out the wall Black, Brown, Blue, remember I'm in Belgium!!!!! My question is which goes where on the new thermostat, I got a wiring diagram but it frightens me, can't understand it at all, just need to control heating no hot water, should just control the boiler which I presume would control the pump.

Thanks in advance for you help

 

[cross thread]

with a meter you should be able to test you want to know the colour of supply that should have 240v when clock on for heating.load that is the switched supply from stat when demand reqd, and last wire should be neautral