High Point in circuit

[rednaxela]

Is it normal for a combi boiler be fitted at the highest point in a complete circuit? ie all pipework for radiators and taps below, or should you have a higher radiator to allow bleeding.

thanks, Alex.

 

[ChrisR]

It's ok, pplemty do in single floor flats. It's in danger of running dry if there's leak though so it would be preferable to use one with a water pressure switch . What model?

 

[rednaxela]

its a Vokera Excell 80SP,
I was concerned about the risk of air getting into the heat exchanger.
The installation guide said to avoid it if possible, but I had never seen it in any other installation manuals I have been looking at for new boilers.
(it got me wondering)...

 

[Agile]

All modern combi boilers have an automatic air vent.

These used to be at the top of the boiler but are nowadays more often towards the bottom and have to rely on pump pressure to force the air out of the boiler.

Getting all the air out can take a few hours on a new installation.

Tony