Initial Commissioning - Wilo DrainLift M2/8 Notice De Montage Et De Mise En Service

Fig. 12: Position of the venting screw while the unit is in operation
Installation and operating instructions Wilo-DrainLift M2/8
• Check the level control for perfect mechanical condition. To do this, open the screw lid and
check the float switch installed inside to make sure it can move easily and check that the
float and the counter nut on the rod have a tight fit. Seal the screw lid tightly again.

8.2 Initial commissioning

• Plug the mains plug in.
• Open the check valves.
• Fill the system via the connected inlet until each pump has pumped out at least once and
the pressure pipeline is completely filled.
With the pressure pipeline filled and the inlet closed, the filling level in the tank must not
rise. If the filling level continues to rise, the flap of the non-return valve is leaky (must
check the flap and the position of the venting screw).
For a test start-up, the "manual mode" button on the switchgear can also be pressed
before reaching the switch-on level in the tank.
• Check the unit and pipe joints for impermeability and perfect function (switch the pump
on and off).
8.2.1 Switchgear settings
The switchgear is preset in the factory. For the rotation direction monitoring, adjustment
of the DIP switches and other settings, see the installation and operating instructions of
the Wilo EC-Drain LS2 switchgear.
• Compare the default value of the motor current with the specifications on the name plate
of the motor and, if necessary, correct the settings.
8.2.2 Setting the pump run-time
The pump run-time must be set in the switchgear on the rotary potentiometer (for setting
the run-on time).
DANGER! Risk of fatal injury!
When working on the open switchgear, there's a danger of electric shock from touching
the live components.
Work must only be carried out by skilled personnel!
To set the potentiometer, switch the device so it's voltage-free and secure it against
being switched on again without authorisation.
• Set the pump run-time so that:
• the amount of sewage in one pump operation is as great as possible (utilisation of the
maximum switching volume)
• loads on the unit and pipe are avoided
• noise development is at a minimum.
• If, after switching off the pump when only water has been pumped without slurping (audi-
ble pumping of a water/air mixture), there is no or just a slight flap knock (closing noise of
the flap), the pump run-time should be set so that the pump switches off shortly before
slurping starts.
• If the flap slams closed after switching off the pump combined with vibrations in the unit
and pipework, this is to be stopped by adjusting the pump run-time. To do this, adjust the
potentiometer for the pump run-time until you can hear the slurping of the water/air mix-
ture at the end of the pump operation.
CAUTION! Risk of damage!
If the venting screw with sealing nut is not in
the required position, this can lead to damage
on the flap and unit, as well as to high noise
development (Fig. 12).
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