Wilo Pump MAXO 3 x 3 – 20

Pre-Disassembly Safety Measures

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

Drain the system if no shut-off valves are fitted

Tighten motor fastening screws diagonally

Insert sensor cable into the electronic module interface

Loosen or insert the twin-head pump cable connecting the motors

Pre-Disassembly Safety Measures

Ensure shutdown procedures are followed before dismantling/installing the electronic module

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 in case of module replacement

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

Carefully remove sensor cable/twin-head pump cable from the electronic module

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

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

Describe any remaining issues or observations