Connecting a roomstat to combi boiler controller

[griff22]

I have a combi, heating a small single storey cottage. All rads have TRVs. When the rooms are up to temp, the boiler and pump switches off. When rooms cool down again the system does not sense this and does not fire-up again (seems to have gone to sleep!).
My theory is that the cool water is not being circulated back to the boiler because the pump is not running, so the boiler does not sense the demand for heat.
Surely I need a room stat connected to the pump via controller, which would then switch the pump on when the temp dropped, thus allowing the boiler thermostat to sense the need for heat?
If this is what is needed please advise how to connect to Worcester combi controller.

 

[kevplumb]

which combi / model

 

[Boilerman2]

Sounds like an old Vaillant EH

 

[kevplumb]

Worcester combi controller.

now i am confused

eh you mean sine 18 tw3

 

[griff22]

Worcester heat slave 5 years old

 

[kevplumb]

if its the greenstar


block x2 lr & ls

if its the 26 / 32



block x 2 terms 3 & 2

 

[griff22]

Thanks for that, but as I am not familiar with the shorthand like "block", please explain in laymans terms.
I presume your instructions apply to connections (terminals?) in the controller --- how do I get into the controller? !!

 

[kevplumb]

which model heatslave is it ?

 

[griff22]

Sorry,
its the 26

 

[kevplumb]

you want me to type it or do you want the book ?

if you want the instruction book i need an e mail adress

 

[griff22]

Hey! this is very much appreciated. I really did not expect to get help like this. Thankyou
Whatever is easier for you. If its short than type it, but if you can send the book then that would be great. My email: [email protected]

Many thanks!

 

[kevplumb]

sent

 

[griff22]

Very many thanks indeed Kev.
Griff