For best operation, it’s a big advantage if the pipe from top of boiler to upper part of Laddomat ® 21 is connected with as big dimension as possible. The slower flow in this circuit makes it possible for air to ascend and disappear through the expansion vessel.

On installations with smaller pipe dimension you will get a faster flow and there’s a big chance of air being sucked down into the pump. This will lower the capacity of the pump. This gives an accelerating effect because it gives higher temperature in the boiler, which causes more air to be emitted, which causes more air to be sucked down into the pump…

More information on how to solve air problems in heating systems can be found in our Manual for Laddomat ® 21. See our website under ”Documents”. You can also click directly on the link below to open the document.website Laddomat 21 - Manual