Wilo Pump MAXO 2 x 3 – 20

Avoid flow in the pump during dismantling/installation work

Close the existing shut-off valves in front of and behind the pump

Drain the system if no shut-off valves are fitted

Ensure no objects are placed in the contact area of the motor

Ensure correct assignment of pump/electronic module during replacement

Disassembling the Electronic Module

Loosen handle grip of the Wilo-Connector using a screwdriver and pull out socket

Avoid flow in the pump during dismantling/installation work!

Close the existing shut-off valves in front of and behind the pump!

If no shut-off valves are fitted, has the system been drained?

Tighten motor fastening screws diagonally.

Enter the tightening torque for motor fastening screws.

Insert sensor cable into the electronic module interface.

Is the electronic module separated from the motor if access to screws is not guaranteed?

Access the 'Diagnostics and measured values' menu

Select 'Maintenance' from the menu

Select 'Pump venting' to vent the pump hydraulics

Check for noise reduction after venting

Confirm that the pump is operating normally

Allow the pump to cool down before commencing any work!

Close shut-off device or drain unit!

Follow the manufacturer’s instructions and safety data sheets for possible additives in the system!

Dismantle the two-part thermal insulation from the pump housing of single pumps.

Pull sensor socket from sensor.

Loosen screws of the fixing plate.

Pull out sensor. If required, lift the sensor into the groove with a flat screwdriver.

Avoid flow in the pump during dismantling/installation work!

Close the existing shut-off valves in front of and behind the pump!

If no shut-off valves are fitted, drain the system!

Remove sensor cable carefully from the electronic module.

O-ring Installation and Leak Test

Ensure proper O-ring installation