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How do I refill the boiler? Vaillant ecoTEC pro 28 combi

Postby davejohnparkes » Sun May 16, 2010 10:10 pm

The bar pressure guage shows F22 (manual says the boiler needs filling with water)

Having read pages and pages of info. I cannot understand how to fill the system

The manual says:

4.3.2 Checking the system pressure
• Check the water pressure of the system using the
pressure gauge (1) before putting the boiler into operation.
For the heating system to operate properly, the
indicator on the pressure gauge must be in the dark
grey zone when the system is cold. This is a filling
pressure between 1.0 and 2.0 bar. If the indicator is in
the light grey area (below 0.8 bar), fill the system up
with water before putting the boiler into operation.

I had an electrician here today so maybe something went wrong with the c/h system when the electrics were turned off.

Any ideas please?

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Simply Build It

Postby plumbbob » Tue May 18, 2010 7:25 pm

If you look up under the boiler you will see two small valves linked by a silver flexible pipe. Turn both valves so they are in line with the pipe. You should hear water enter the boiler.

Re-filling could take as little as 2 or 3 seconds. Watch the pressure gauge carefully so as not to over fill.

The electrical work will have no effect on the boiler. But they don't lose pressure without reason. You need to keep an eye on it as the pressure may have been lost over a period of time.
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Postby davejohnparkes » Thu May 20, 2010 12:28 pm

Many thanks for your easy to understand reply. It worked perfectly. Thanks again.
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