UNM Clean - OF
II/9
GB
2.6 Maintenance
2.6.1 Before each maintenance task
1. Switch off compressor at the ON/OFF
switch (item 10) (if available). Discon-
nect power supply at main switch.
2. Depressurise the whole compressor:
slowly open the ball valve condensate
drainage (item 09) and close it if no more
air escapes.
2.6.2 Cleaning the compressor
• Clean the cooling fins on the cylinder, cyl-
inder head and aftercooler using com-
pressed air.
• Clean the fan impeller cover on the motor.
2.6.3 Clean the air cooler
Only devices with membrane dryer!
The air cooler must be blown out from the
front using a blow gun held at an angle of 90°
(Fig. 7a).
2.6.4 Clean FDM insert
Only devices without membrane dryer!
1. Depressurise vessel of FDM.
2. Hold a suitable vessel under the conden-
sate drain. Drain condensate.
3. Disassemble vessel of FDM. Unscrew the
mounting screw of the filter insert by
screwing anticlockwise (Fig. 4a).
4. Remove the filter insert, clean in soapy
water (max. 50 °C). Change the filter in-
sert, if required.
5. Installation is in reverse order.
2.6.5 Draining condensate from FDM
Only devices without membrane dryer!
Draining semi-automatically:
Rotate the
condensate drain valve 1/4 turn anticlock-
wise. Under 1 bar: condensate drains. (Fig-
ure 4a)
Draining manually:
Rotate the condensate
drain valve clockwise and push it up. Con-
densate drains.
2.6.6 Draining condensate from pres-
sure vessel
Only devices without membrane dryer!
1. Place a suitable vessel under the conden-
sate drain.
2. To drain condensate, the pressure must
be approx. 2 bar.
Interval / No later
than
Tasks
See chap.
-- / As needed
Clean compressor
Clean the air cooler
Clean filter insert (FDM)
Clean intake filter
Change the filter element in the water separator
Change the filter element in the microfilter
-- / after each use
Drain condensate from the pressure vessel (only
devices without a membrane dryer)
Drain condensate from FDM
Once after 10 h / --
Check screw connections
-- / Weekly
Check intake filter
annually / --
Replacing the check valve
Check screw connections
Change the filter insert (FDM)
Change intake filter
Clean the air cooler
Change the filter element in the water separator
Change the filter element in the microfilter
2,500 h / After 5 years
Change safety valve
