Wall mounted thermostats !

idunno1

Wow this is getting a bit complicated,i know what TRV's are now and ABV's or ABPV's and have heard that i can replace the uncontrolled thermostat with a TRV but i am unsure that i have a ABV fitted...................the boiler is new yet the rest of the system has been in for 10-15 yrs.

Also pincher states that you must never close the uncontrolled stat fully while others say you can................would a turned off TRV be ok ?

Is there anyway i can see if an ABV is fitted or should i get it checked out ?

As you can tell this is all new to me but i am slowly coming to grips with it (i hope or you might hear a loud bang ) thank you all again for your help.

ziggyman99

I'm struggling here. It you want to ring me i'll explain it to you quickly. Sometimes it's easier on the phone. Sending PM now.....

Cardew

idunno1 wrote: »

Also pincher states that you must never close the uncontrolled stat fully while others say you can................would a turned off TRV be ok ?

Is there anyway i can see if an ABV is fitted or should i get it checked out ?

As you can tell this is all new to me but i am slowly coming to grips with it (i hope or you might hear a loud bang ) thank you all again for your help.

Although Pincer posts sense, I believe he is wrong in that statement - provided you have an ABV fitted. Shutting off a radiator with a normal valve or a TRV achieves exactly the same effect - the valve closes and allows no flow of hot water through the radiator.

The reason one radiator in the house did not have a TRV fitted(was uncontrolled) was to stop the pump trying to pump water around a CH circuit when no flow was possible because all the valves were closed. The ABV allows a flow of water as it provides a bypass to all closed valves - see the Myson extract I quoted above.

Incidentally even without a ABV it would not be dangerous to have all valves closed, just that the pump would be churning away without the ability to move water.

The reason the recommended radiator(to have no TRV) is in the same room as the wall stat is so the wall stat will control the heating in that room - it stops the pump.

However as you have found out, the temp set on the wall stat determines if there is heating available to the rest of the house. In your case unless your wall stat in the hall is 'demanding' heat there will be no heating in your bathroom or anywhere else in the house as there will be no flow of water.

So put up the temp on the wall stat, shut off the hall radiator and it will be 'demanding heat and the pump will run.

idunno1

Many thanks to you all but it's sorted now..................I have got an ABV so now have thermostats on all radiators and i'm happy with that.

Thanks for your pm ziggyman99 unfortunately my pop up blocker stopped it so i never actually read it but it's all running fine now so no worries.

Cheers again everyone and happy heating !