Wilo Pump MAXO 1.25 x 3 – 52

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 carefully 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

Open the 'Pump venting' function in the 'Diagnostics and measured values' menu

Select the following options in the 'Diagnostics and measured values' menu

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

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

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