Maintenance and r

Danger! Electric shock can kill!

  • Before working on the pump, disconnect from the power supply and secure against reconnection.
  • Check that no voltage is present.

Danger! Pressurised system!

  • Before working on the motor or pump connections, close the shut-off valves.

Warning! Risk of scalding due to hot water!

  • Avoid direct contact with escaping hot water.
  • The pump housing can similarly reach a high temperature due to the hot medium being pumped.
  • Whenever the motor is opened up, replace the seal in the pump housing.
  • For maintenance, first close the isolation valves.

  • Demount M6-screws completely.

  • Remove pump motor.

  • Carefully lift the rotor off the bearing pin.

  • Using a limescale remover, free the rotor and separating cap of limescale. If necessary, replace the rotor. Use only soft, non-metallic tools (e.g. brush, cloth, toothpick).

  • Reposition the rotor on the bearing pin.

  • Dispose of used O-ring.

  • Insert new O-ring into the pump housing and press slightly into place.

  • Remount pump motor.

  • Tighten M6-screws
    (max. 5 Nm).

  • Slowly open the shut-off valves again.

  • To vent any remaining air, switch the pump on and off several times …

  • … and open the DHW tap several times …

  • … until the pump runs quietly.