R6660D with fuse box to nest e thermostat heatlink

Romedan

Romedan

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I've had a quick look on the forum and have found similar but nothing I can see that's double cabled and with a fuse box.

I think I've identified the black as C and grey as NO via the forum.

Question is, what do I do with the wires from the boiler and fuse box. I'm assuming these do not go to the nest heatlink but still need to be connected?

honeywell.jpg fuse.jpg
 
The two live wires need to remain connected together, and the two neutral wires need to remain connected together. The Nest Heat link does need a 230V supply so normally they would normally be connected there. So normally it would be connected:

Both wires in R660D N go to Heat link N

Both wires in R660D L go to Heat link L

Wire in R660D A goes to Heat link 2 Heating 'common'

Wire in R660D B goes to Heat link 3 Heating 'call for heat'
 
stem said:
The two live wires need to remain connected together, and the two neutral wires need to remain connected together. The Nest Heat link does need a 230V supply so normally they would normally be connected there. So

All wires in R660D N go to Heat link N

All wires in R660D L go to Heat link L

Wire in R660D A go to Heat link 2 Heating common

Wire in R660D B go to Heat link 3 Heating call for heat
Click to expand...

Sorry I should have mentioned it was UK version and is powered by batteries so not 100% on the 230v supply?
 
Ah OK, then the two lives should be put in a separate terminal connector so they are connected together and the two neutrals in another connector, they can be tucked away in the corner. Only the wires from A and B should go to the Heat link.

No need to apologise I should have guessed it was a Nest-e when you said C and NO
 
stem said:
Ah OK, then the two lives should be put in a separate terminal connector so they are connected together and the two neutrals in another connector, they can be tucked away in the corner. Only the wires from A and B should go to the Heat link.

No need to apologise I should have guessed it was a Nest-e when you said C and NO
Click to expand...
Thanks :D, I'm now the proud owner of an installed nest e thermostat. Seeing all those wires for the first time was a bit daunting. Turns out it was the easiest part of the whole process.
 
Feel I need to come back to this, while the heating works fine. The hot water is luke warm unless I have the thermostat on/above 20°. There's nothing showing in the app that says it's controlling the hot water. Perhaps I've gone wrong somewhere during the setup.

I'll post a photo of the nest wiring once I get home.
 
Romedan said:
Feel I need to come back to this, while the heating works fine. The hot water is luke warm unless I have the thermostat on/above 20°. There's nothing showing in the app that says it's controlling the hot water. Perhaps I've gone wrong somewhere during the setup.

I'll post a photo of the nest wiring once I get home.
Click to expand...
you cant control HW with a NEST E, you have bought the wrong Nest
 
As @ianmcd The R6660D is a receiver for an existing central heating thermostat. If you have replaced that with a Nest-e then it will just control the central heating as did the previous central heating thermostat.

You didn't mention any hot water control, however, If you have a hot water cylinder, then the control of that will remain as it was, via the original programmer and hot water cylinder thermostat. Nothing to do with Nest-e
 
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