Purge Air in Boiler

[cs2kplus]

Hi,

I want to push air out of my boiler system.

See diagram.

Someone told me to shut close valve shown. I was thinking maybe it should remain open to run throughout.

Can I just open *V and let the bubbles run out?

This is a one zone boiler.

Thanks,

Wayne

 

[cs2kplus]

I found this on the internet. Seems to have done the trick.
1. Shut off boiler.

2. On the boiler will be a drain valve that a hose can attached to; it will look like a standard hose bib like you see on the outside of a house. Close the gate valve between the boiler and the bib. Connect a hose to it, and run the hose to a bucket.

3. Open the valve on the bib, while adding water to the boiler with the fill valve. The fill valve is located on the supply pipe or filling loop, usually the smallest diameter pipe in the system.

4. Flush the system, letting the fill water run until no air bubbles come out from the hose in the bucket.

5. Open the gate valve again, this will bleed any remaining air.

6. Close the hose bib valve.

7. Restart boiler