Air in indirect hot water system

erockaway

Hi all,

I have a peerless boiler and an amtrol indirect hot water heater. I have had about four instances since I had them installed in November where i lose all hot water. I know how to fix it for the time. That is until it happens again.

What can I do to locate where the air is coming in and prevent this from happening again.
As always your expertise is appreciated.