wiring new thermostart to boiler help needed

[jay05]

I have a alpha boiler my room thermostat has broken so I bought a new one. It's a home easy he105 it has 4 position for wires llive negative sloff slon but when I looked at the one that's on the boiler it only got 2 wires going to it have included photo s of the wiring for boiler and switch

 

[flameport]

The two wires for the existing thermostat connect to L and SL(on)
You then need another cable for the mains supply to the L and N terminals.
The red link is not required.

OR:

remove existing thermostat cable.
Get new cable with 3 cores and earth.
L&N in the boiler connect to L&N on the receiver.
1 in the boiler to SL(on)
Keep the red link
Earth connects to the earth terminal in the boiler and the earth terminal in the backbox behind the receiver.