Search results

It is definitely split between HW and CH. The HW pipes go to the HW tank and the CH pipes go to the CH loop. I am also wondering about this immersion heater in my HW tank. It doesn't seem to work overnight as it should as I am on Economy 7. I am thinking I should switch my plan off E7 now...

This seems to work. Can someone check the logic of the cables please? The HW does seem to take a while to turn On so I'm thinking maybe there's a conflict on the Orange and HW On (6 and 8, which I linked into 12) I created a little table map for how things are atm: 12 is the link between...

The Grey for the boiler I meant. I've only got Brown, Grey and Earth and Blue on the Boiler. Brown seems to me like it should be always L, but then where do I put its Grey? Link it with HW Off? What about CH how does that tell the boiler to turn Off?

Well I don't have a Cylinder Stat but I have an old immersion heater that I suspect is not working. There's no apparent wiring that I can identify for it coming to this box. I'm quite stumped atm. I tried to arrange the center wiring box as per its diagram but I'm having trouble figuring out...

So I'm looking into the wiring deviation from the standard Danfoss center. Can someone explain to me what 14-16 are for? The Cyl Stat stuff? For some reason, the previous cowboy bridged 15-16 with the bridge wire usually found between 12-13 for Boiler and Pump to start simultaneously (which...

I pretty sure the HL works fine as when I turn the HW Boost On, the relay goes for the Pump and the Valve switch moves (audibly). Just the boiler doesn't fire up. It did before when I used Manual but it was in a different configuration which wasn't turning the boiler off. My brain is fried atm...

So I did some tidying up to help myself and make it easier for people to help me as well hopefully: Wiring Central: I took out the separate live cable to Heatlink and just wired it in serial from its own L. I ran a single Earth wire to it that I took out of a cable. I linked 2 and 3...

Sorry, I missed this reply. This is an old installation indeed, not sure how old, but definitely before 2022 haha. The reason I didn't do a straight swap is because there was a separate programmer and thermostat there previously. This was even more confusing as the thermostat had no control...

Thank you for that input. It helps that my thermostat has a base and will be kept indoors so no T1 T2 wires at all. It's all already connected and controlling stuff, just not very well as HW not working and depending on how I play with 2 and 3 it doesn't turn off the boiler once it turns it On...

The brown in 6 goes to grey from the 3 port valve, and the GY wire is 12 as we discussed above, and the Blue in 13 is on the same cable. The blue you're probably seeing going nowhere at the bottom is the cable I used to pull live into the heatlink which I've only used Earth and Live from (B and...

Correct. I followed this guide: How to install Nest thermostat (UK) on a Y plan - system with hot water cylinder & 3 port valve

Nope, The previous cowboy ran out of wire or colors and decided to use a standard 3 way mains cable. That earth you see far right at 12 is DHW Off on the original programmer.

Hello, I have done my best to follow a very useful post here and also a very useful Youtube video on Y plan installs but I am finding difficult to untangle the solution to the wiring mess that the original cowboy installer seems to have created. The system is an oil fired boiler for both HW and...