HELP!!! Trying to replace Potterton PRT2

[phil210802]

Hi,

I am trying to replace my existing Thermostat (Potterton PRT2) with a wireless Siemens one (RDH10RF/SET-GB).

Each time I try and wire it up I blow a fuse

The Potterton is has 3 Wires (Red, Yellow & Blue), Red goes into COM, Yellow into H and Blue into N. There is also a tiny Brown cable going from COM to TL (not running back to the boiler).

Does any one have any suggestion as to how this should be wired as each of my attempts (2) have failed and I keep blowing fuses.

Thanks for your help.

Phil210802

 

[flameport]

Blue - N
Red - L
Yellow - L1
Add a wire link between L and LX

 

[phil210802]

Thank you the wire code you provided works a treat (also saves me having arguments with the MRS).

Thanks once again.