I have a Logic ESP1 35 Combi Boiler and 2 Honeywell T3 thermostats (T3H110A).
I wish to install 3rd gen nest and have purchased two.
I have read a lot on these forums of other installs.
From what I can see I need:
1. To run a L&N from the wiring centre to the HL
2. Put a jumper cable from L to 2 on the HL
3. The L&N from the stats to be removed from wiring centre and wired to T1&T2 on the HL
4. The switched live black cable on the valves removed from wiring centre and wired to 3 on the HL
The only thing I’m a little unsure of is the wiring in the nest stat. The T3 has just the two wires and appears to being powered off batteries. There is however a spare grey core of the cable behind it.
Any help would be gratefully received
Thank you
I wish to install 3rd gen nest and have purchased two.
I have read a lot on these forums of other installs.
From what I can see I need:
1. To run a L&N from the wiring centre to the HL
2. Put a jumper cable from L to 2 on the HL
3. The L&N from the stats to be removed from wiring centre and wired to T1&T2 on the HL
4. The switched live black cable on the valves removed from wiring centre and wired to 3 on the HL
The only thing I’m a little unsure of is the wiring in the nest stat. The T3 has just the two wires and appears to being powered off batteries. There is however a spare grey core of the cable behind it.
Any help would be gratefully received
Thank you