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Installation and operating instructions Wilo-DrainLift XXL
17
• Switch off the switchgears so that they are voltage-free!
• Open the cover of the switchgear.
• Remove the protective cover from the threaded cable connection.
• Feed the cable through the screwed connection and connect it to the potential-free alarm
contact in accordance with the wiring diagram.
• After connecting the cable for the alarm signal, close the cover of the switchgear and
tighten the threaded cable connection.
• Switch on the switchgears.
8 Commissioning
It is recommended to have commissioning performed by Wilo's customer service.
8.1 Inspection of the unit
CAUTION! Risk of property damage!
Dirt and solids as well as incorrect commissioning can cause damage to the unit or indi-
vidual components during operation.
• Clean the entire unit to remove any dirt, in particular solids, prior to commissioning.
• Observe the installation and operating instructions for the pump, switchgear and
accessories!
Commissioning may be carried out only if the relevant safety regulations, VDE regulations
as well as regional regulations are met.
• Verify the presence and correct versions of all required components and connections
(inlets with check valve, tank connection, discharge pipe with non-return valve and check
valve, suction line, ventilation via roof, floor fixation, electrical connection).
• Check the setting of the venting screw of the non-return valve (accessory).
CAUTION! Risk of property damage!
If the venting screw of the non-return valve is screwed too deep into the housing, this
may cause damage to the valve and unit or considerable noise. Make sure the position
of the venting screw ensures the closing of the valve!
8.2 Initial commissioning
• Switch on the unit by the main switch.
• Check or make the settings in accordance with Section 8.2.1 and 8.2.2.
• Open the check valves.
• Fill the unit via the connected inlet until each pump has pumped out at least once and the
discharge piping is completely filled.
The filling level in the tank must not rise when the discharge piping is filled and the inlet
closed. If the filling level continues to rise, the flap of the non-return valves is leaky
(inspection of the flap and the position of the venting screw required).
The “manual mode” button on the switchgear can be pressed before reaching the activa-
tion level in the tank to test the starting procedure.
• Check the unit and pipe connections for impermeability.
• Fill the unit with a maximum possible inlet and check whether the unit is working perfectly.
Observe in particular:
• The correct position of the switching points.
• Sufficient volume flow of the pumps at maximum flow while the pumps are running (level
muss drop).
• Vibration-free operation of the pump without air bubbles in the fluid
CAUTION! Risk of property damage!
Air in the fluid causes considerable vibrations which can destroy the pumps and the
entire unit, depending on the respective operating conditions of the pumps.
The minimum water level in the tank for the “Pump 1 ON switching point level” (see
Technical data) must be ensured.
