Purging and

Careful! Damage to bearing caused by dry-running.

  • Flush pipework thoroughly with water and bleed carefully.
  • For bleeding close the isolation valves.

  • Unscrew bleeder screw completely …

  • … then fix a drain valve with ¼“-thread connection.

  • Open isolation valve in front of pump inlet and bleed pump by opening the drain valve. Make sure, that return line gets completely vented.

  • Close isolation valve in front of pump inlet, unscrew drain valve, …

  • … then remount bleeder screw to pump housing.

  • Re-open isolation valves slowly.