Performing Maintenance
FAM 25/45/60/75/95
en(us)
Page 87/160
BEWA FAM25-95 3402054f en(us) 2013-06-13
2013-06-13
Water ring vacuum pump (FAM-xx-x-x-xx-W/WA-...) maintenance
Check/Clean the level switch
To check or clean the level switch, proceed as follows:
1. Remove the covering tin (1) of the vacuum pump.
2. Unscrew the four fastening screws of the level
switch.
3. Remove the level switch (2) from the vacuum
pump in an upward direction.
4. Check the level switch (2) for dirt and damage.
5. Check the function of the float switch(es) on the
basis of the PLC inlet.
See the illustration below in this connection.
Please note that to inspect the switching status,
the power unit needs to be switched on.
6. Perform the assembly in reversed order of
sequence.
7. Testing/Cleaning the level switch is complete.
!
Switching Status - Level Sensor Water Ring Vacuum Pump/PLC
Level sensor
I1.0
I1.1
I1.2
I1.0
I1.1
I1.2
I1.0
I1.1
I1.2
OFF
OFF
ON
ON
OFF
ON
ON
ON
OFF
PLC