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Maintenance
2017/11
5.3 Preparing for maintenance work
– Make sure that the inlet to the lifting station is not used during maintenance.
– Make sure that the lifting station cannot be switched on accidentally during maintenance work. This applies in
particular if the control unit is in a different room to the system tank.
5.4 Maintenance jobs
5.4.1 Replace battery
• Perform the work described in 5.1
• Open the housing cover of the control unit and replace the battery
• Screw down the control unit‘s housing cover, make a potential-free connection if necessary and perform a
functional check (see 3.7.2)
• Change the battery once a year
5.4.2 Cleaning the lifting station
• Lower the wastewater level in the system tank to a minimum. To
do so, run the wastewater pump in manual operation (see Chapter
4.6) until the pump draws in air.
• Bring the ventilation device <25A> on the backwater preventer
<25> into a horizontal position (as shown), the dammed up
wastewater can ow back from the pressure pipe into the system
tank
25A
25
Ill. [18]
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