Motorised valve 2 port

[Aindowsimon]

The boiler cannot remain on if the feed from the 'stat is removed i.e. if the programmer switches off, as there is no premanent feed to aux. switch.

I understand but if its failed with the aux closed when another zone valve energises the live will be able to carry all the way back to the live on the faulty motorised valve opening it and heating a circuit witch doesn't require space heating if the prog is off

 

[obleo]

That is correct, but only for the duration of the timed period.

 

[Aindowsimon]

The system wouldn't be working as it should and it may not be so obvious to the occupier but if it failed wired in the conventional sense the boiler would be calling but heat would not travel as the faulty valve wouldn't be opened so boiler probably be on when all prog be switched off but hot water be travelling thru abv( witch will be a small circuit ) if installed then its down to the occupier to realise the boiler short cycling when there is no programmed schedual activated + call out for you = ££

 

[obleo]

Can't fault your logic there. I neglected to mention I intend installing the valves in my own house. I have been 'putting it off' for a mere thirty years.

 

[Aindowsimon]

Well ur one better than me there I'm still on coal fire as only source of heat dark ages ! I'm shockd about my logic as I'm given the misses wine a good hiding hear ! I'm thinking of trying to put a system together with a multi coil cylinder with solar thermal , back boiler and electric boiler in my own home

 

[Aindowsimon]

30 yrs surely still in the planing stages these things can't be rushed

 

[obleo]

Yes indeed a chap must be circumspect in all things.
Solar is a subject that interests me deeply. If I was 'starting out' again it would be one possible career choice.
Go easy on the vino.

 

[Aindowsimon]

Going easy wont be a problem it's all gone! getting to bed may present a whole different problem or even getting up for work in the morning not worth thinking about adleast for 6 hours anyway . You interested in solar pv or solar thermal , put a few solar thermals in allways suprised how well it works !

 

[obleo]

Both, but chiefly pv. If (when) battery technology improves it will be even better.
Would like to 'pick your brains' re. thermal in the fulness of time (as they say).