Taps & Central Heating

[AnonymousImport]

Hi,

I have a combi-boiler. I am maintaining the pressure at 1 bar, however when I turn on the hot taps the pressure goes down quite a bit, when the tap is closed the pressure returns to 1 bar. Is this supposed to happen?

cheers

 

[AnonymousImport]

Is it a Worcester 35CDi?

The pressure gauge is likely to be on the intake side of the pump, and when circulating around the boiler, as in DHW mode, causes a depression that the gaige shows.

Sounds normal therefore

 

[AnonymousImport]

Hi,

The boiler is a SIME. If the pressure goes down, does that mean air is being let in?

 

[AnonymousImport]

No, it means the gauge is measuring the pressure drop on the pump intake side.

If the pressure recovers, no problem.

Worcester 35s do it in a pronounced way.

If the gauge had been on the pump outlet side, you would tend to see a rise in pressure when running.