Recent content by Alan Shaw

Hi Stem, Apologies for the delay in getting back to you. I am pleased to report all is now working thanks to your advice. The tank thermostat proved problematic and had to be changed. Considering my original enquiry related to an orphan wire on the junction box I'm amazed how much had to be...

Hi Stem, Thank you for your comprehensive reply. I had already followed your advice but my concern is the H/W switched live from either the LP522 or Heat -Link isn't going anywhere in the junction box. I am reluctant to power up and risk damaging the Heat - Link. As I said earlier I must have...

Hi Muggles, The existing LP522 cables have been disconnected as I wanted to re-site the Heat-Link and install using fresh 5 core for switching and ground for 12volt Nest terminal.

I have now updated diagram to give more information. Assuming I have summarised the connections correctly at foot of diagram it doesn't appear to make sense as terminal 7 appears to be handling both H/W & C/H. Cannot understand how this can of worms could have occured when only the LP522...

As a precursor to upgrading my LP522 Controller to Nest I set about documenting the wiring in the junction box. I have now disconnected the LP522 and on checking my diagram realise I have made a mistake. You can see from the attached the call for hot water goes to 5 on the junction box but there...