Karcher HD 7-250 De Tr1 - Manual (Page 71)

Wartung.pm6.5 - GB
Page 4.1
Maintenance
BOGE Operating instructions for CM 9 series screw compressor module
ATTENTION!
Ensure that maintenance work is ony carried out by specialists or appro-
priately trained person.
– In case of removing any cladding or safety devices prior to starting any
maintenance work, always stop the compressor as described in these
operating instructions. Refit the cladding or safety devices immediately
upon completion of the maintenance work.
– Only use original spare parts, compressor oils and operating materials
released by BOGE for the maintenance work.
– When the automatic restart (Auto-Restart) is activated, the compressor
will start automatically following a voltage loss.
Prerequisite: The net pressure is lower than the set switch-on pressure.
CAUTION: Risk of injury!
Always adhere to the prescribed operating method described below for
all maintenance work. Never omit a single safety step!
Otherwise you will risk injury from restarting, electric shock or parts
which may fly off.
Prior to all maintenance work:
1. Switch off the compressor using the OFF button.
2. Switch off the main switch and secure against unintentional switching-
on.
3. Check to ensure that all machine elements are definitely currentless.
4. Separate the compressor from the compressed air network by closing
e.g. the ball valve at the compressed air outlet.
5. Vent the compressor.
To this effect open the safety valve on the combined compressed air-
oil receiver as follows:
– Turn the knurled nut counterclockwise until you can feel a resilient
resistance.
– Tun the knurled nut a little further.
Any possibly existing air will escape.
– Once the residual air has completely escaped from the system,
firmly retighten the knurled nut.
Once the maintenance work has been concluded:
6. Open the ball valve at the compressed air outlet.
7. Prior to switching on again, check whether anyone else is working on
the compressor!
4.1 Safety instructions