On Tuesday, 27 March 2018 11:45:14 UTC+1, John Rumm wrote:
On 27/03/2018 03:39, tabbypurr wrote:
On Monday, 26 March 2018 21:39:44 UTC+1, Harry Bloomfield wrote:
tabbypurr brought next idea :

My Vaillant does that.

Is that a conventional / open vented boiler, if so you need to let
Vaillant know that they do actually produce one.

I am aware that it is often fitted to sytem and combi boilers.

condensing non-combi, 400 series IIRC. IIRC it's an installed option not always present.

If you pair it with conventional controls, then it won't be able to work
out what function its supposed to be doing - so then it will use the CH
flow set point temp all the time.

I presume the boiler gets 2 separate call for heat signals, I don't remember.


NT