Wiring a new D2 thermostat?

waynew · May 24, 2022

waynew · May 24, 2022

waynew said:
View attachment 97872

loz2754 · May 25, 2022

Red A
Yellow B
Blue (neutral) not required in the new thermostat.
The old thermostat has an accelerator to improve accuracy, which needed a neutral conductor.
The new thermostat does not have this feature.
Connect the blue into a connector block and tuck it out of the way.

waynew · May 25, 2022

Ok.

loz2754 said:
Red A
Yellow B
Blue (neutral) not required in the new thermostat.
The old thermostat has an accelerator to improve accuracy, which needed a neutral conductor.
The new thermostat does not have this feature.
Connect the blue into a connector block and tuck it out of the way.

So A would be red, B would be yellow, and would I put the earth in C or just snip that off as it wouldn't be needed?.
I am trying to upload photos but with no luck at the moment..

loz2754 said:
Red A
Yellow B
Blue (neutral) not required in the new thermostat.
The old thermostat has an accelerator to improve accuracy, which needed a neutral conductor.
The new thermostat does not have this feature.
Connect the blue into a connector block and tuck it out of the way.

So A would be red, B would be yellow, and would I put the earth in C or just snip that off as it wouldn't be needed?.
I am trying to upload photos but with no luck at the moment..

loz2754 · May 25, 2022

Don't snip the earth, as it may be needed in future. It should be sleeved green and yellow and terminated in a connector block.
DO NOT connect anything into C, unless you want to hear a bang!

waynew · May 25, 2022

loz2754 said:
Don't snip the earth, as it may be needed in future. It should be sleeved green and yellow and terminated in a connector block.
DO NOT connect anything into C, unless you want to hear a bang!

Ok about the earth and a definite ok regarding C.
Thank you for your help.

waynew · May 25, 2022

loz2754 said:
Red A
Yellow B
Blue (neutral) not required in the new thermostat.
The old thermostat has an accelerator to improve accuracy, which needed a neutral conductor.
The new thermostat does not have this feature.
Connect the blue into a connector block and tuck it out of the way.

both wired as stated but not getting no response from the boiler!. Turned the thermostat up to 24 degrees just to make sure and still nothing.
Any ideas??
Just to add, boiler works fine when heating hot water.