Hi all
Wonder if someone out there would be kind enough to double check my thinking for wiring-in a 3rd gen NEST to replace my Drayton Lifestyle LP522 programmer.
I'm pretty confident with home wiring but have never amended the central heating electrics. I've had a good look at the electrics in my new place and am pretty certain I understand what to do but wanted to double check.
I have a Y-plan installation with the programmer in the kitchen, Room thermostat in the hall and wiring junction box in the upstairs cupboard next to the tank.
At the programmer box location I have the following set up:
I'm proposing to fit the following wires into the Nest controller:
Fit N & L to corresponding Nest terminals.
Run a wire from the Nest L to HTG common (2) and to HW common (5)
Attach the HW satisfied wire (HW off, 1) to the Nest HW normally closed (4).
Attach the HW On wire (3) to Nest HW Open (6)
Attach the HTG On (CH on, 4) to Nest HTG Open (3)
At the junction box:
Disconnect wires 2 & 3 (red & yellow that go to the roomstat)
Remove roomstat blue earth from N block
Connect 9 (HTG on) to 4 (motorised valve) (via red wire)
I think that is it but I'd be really grateful if someone let me know if this is not the case.
Many thanks
Alex
Wonder if someone out there would be kind enough to double check my thinking for wiring-in a 3rd gen NEST to replace my Drayton Lifestyle LP522 programmer.
I'm pretty confident with home wiring but have never amended the central heating electrics. I've had a good look at the electrics in my new place and am pretty certain I understand what to do but wanted to double check.
I have a Y-plan installation with the programmer in the kitchen, Room thermostat in the hall and wiring junction box in the upstairs cupboard next to the tank.
At the programmer box location I have the following set up:
I'm proposing to fit the following wires into the Nest controller:
Fit N & L to corresponding Nest terminals.
Run a wire from the Nest L to HTG common (2) and to HW common (5)
Attach the HW satisfied wire (HW off, 1) to the Nest HW normally closed (4).
Attach the HW On wire (3) to Nest HW Open (6)
Attach the HTG On (CH on, 4) to Nest HTG Open (3)
At the junction box:
Disconnect wires 2 & 3 (red & yellow that go to the roomstat)
Remove roomstat blue earth from N block
Connect 9 (HTG on) to 4 (motorised valve) (via red wire)
I think that is it but I'd be really grateful if someone let me know if this is not the case.
Many thanks
Alex