Okay. If that's the case then why would heating come on when I press water. And nothing happens when I turn heating on?
The C27 on the back of it told me which wires went where so I just followed the right instructions.
I do have Gravity. I have a water tank in the loft which refills the tank in the airoom cupboard. So it must be gravity?
I still have the 3 way valve. So I'm quite unsure what y plan is now actually.
Damn.
Think I have wired wrong due to it being gravity fed which I assumed was Y plan.
Does below look legit? The only bit that doesn't look right is link 3-4 as well. When CH is on HW needs to be on too.
You can do it without a relay if you do the wiring to the nest slightly different...
Thanks! I'll double check wiring when I get home this evening. I know it sounds stupid but the screw on the nest pinches the wire from a bottom up position so just make sure it get pinched in that gap?
Also yeah I thought it was Horstman when I googled it. But the one I have definitely saying...
Hey Guys,
Sorry I know there's been lots on here about nest and y plans. I thought I knew what I was doing but seems nothing I do works when it comes to boilers.
So, I have my third gen with 3 way valve control. My old unit was a c27 Honeywell control.
C27 standard type backplate. Neutral...