Wilo Pump MAXO 2 x 3 – 35

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

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

Remove sensor cable from the electronic module

O-ring Installation and Leak Test

Insert the O-ring between the motor head and pump housing

Install the O-ring without torsion in the edge of the bearing plate facing toward the impeller

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

Loosen screws of the fixing plate

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

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

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