Maintenance; Maintenance Interval; Maintenance Work - Kessel Aqualift F Basic Einbau- Und Betriebsanleitung

8

Maintenance

Observe EN 12056-4 for maintenance.
8.1

Maintenance interval

According to standard specifications, maintenance must be carried out at the following intervals:
1/4-yearly for systems in commercial operations
1/2-yearly for systems in apartment buildings
Yearly for systems in single-family homes
Visual inspection
The system must be checked once every month by the operator through observation of two switching cycles for opera-
tional ability and leak-tightness.
8.2

Maintenance work

Preparatory measures
Ensure that the inlet to the system remains unused during the maintenance work.
Ensure that the system cannot be switched on accidentally during the maintenance work. This applies in particular if the
control unit is in a different room to the system tank.
Cleaning the station
Prepare the system for maintenance
Lower the wastewater level in the system tank to a mini-
mum. To do so, in manual mode (see "Manual operation",
page 34), switch on the wastewater pump until the pump
draws in air.
Move the backwash device (2) on the backflow preventer
(1) into the horizontal position (as shown in the figure).
The held back wastewater can flow back from the pres-
sure pipe and into the system tank.
Empty the system tank.
This can be done via the connection (6) of the manual
diaphragm pump or using a wet vacuum cleaner.
Unscrew the cover of the maintenance opening (5).
Make sure that the float switch of the level sensor (3) and
the float switch rods are free from suspended matter and
solids, clean if necessary. To this end, in case of stubborn
dirt, remove, clean and re-install.
Make sure that the intake opening of the wastewater
pump (4) is free from suspended matter and solids, clean
if necessary. To this end, in case of stubborn dirt, remove,
clean and re-install.
Removing the pump
Unscrew the screws (7).
Push off the wastewater pump at the push-off notches (8)
using a screwdriver if necessary.
Make sure that the system tank is free from suspended
matter and solids, clean if necessary.
010-974 Lifting station/Installation and operating instructions 35 / 112