Not enough flow through boiler - Undersized pump

What does Low flow mean?

The boiler experiences insufficient water flow, particularly in models 11-44/15-60, often due to an undersized circulation pump.

• Boiler pump is undersized for the system requirements
• Air in the heating system impeding flow

Click steps to track your progress.

1. 1

   Check the installed boiler pump model against the specified pumps in the Technical Data Manual.

2. 2

   If the pump is undersized, consider replacing it with a correctly sized equivalent.

3. 3

   Ensure the heating system is properly bled of air, as trapped air can significantly impede water flow.