Hi All,
New to the forum so hello and any help is appreciate.
Just installed my Nest 3rd gen on our Y plan heating system. I wanted to keep the thermostat in the same place so I decided to wire the heat link into the wiring centre (I’ll put a picture of wiring centre below before nest)
however I‘ve encountered a strange issue, the heating works perfectly on/ off etc but as soon as the ‘hot water’ turns on it also switches the heating on and the thermostat has no control over heating whilst hot water is on.
How I connected the heat link was;
L+2+5 = from fused 3a
Neutral = from wiring centre middle
wiring centre 8 to heatlink 4
wiring centre 9 to heatlink 3
wiring centre 10 to heatlink 6
in order to reuse thermostat wire I linked 2 & 3 and removed the black wires and placed these in T1 & T2.
as mentioned everything fired up and seemed okay until the hot water kicked in and overides it all.
as a note, the 3 port valve works fine as had to put system back to old style as needed hot water without heating. Plus I did leave the old programmer in situ while is did this and just turned both water and heating off.
I assume I’ve mixed up some cables somewhere so any help is appreciated.
New to the forum so hello and any help is appreciate.
Just installed my Nest 3rd gen on our Y plan heating system. I wanted to keep the thermostat in the same place so I decided to wire the heat link into the wiring centre (I’ll put a picture of wiring centre below before nest)
however I‘ve encountered a strange issue, the heating works perfectly on/ off etc but as soon as the ‘hot water’ turns on it also switches the heating on and the thermostat has no control over heating whilst hot water is on.
How I connected the heat link was;
L+2+5 = from fused 3a
Neutral = from wiring centre middle
wiring centre 8 to heatlink 4
wiring centre 9 to heatlink 3
wiring centre 10 to heatlink 6
in order to reuse thermostat wire I linked 2 & 3 and removed the black wires and placed these in T1 & T2.
as mentioned everything fired up and seemed okay until the hot water kicked in and overides it all.
as a note, the 3 port valve works fine as had to put system back to old style as needed hot water without heating. Plus I did leave the old programmer in situ while is did this and just turned both water and heating off.
I assume I’ve mixed up some cables somewhere so any help is appreciated.