II/10
UNM / CPM / ZPM
GB
Only drain oil if the unit has been suffi-
ciently cooled.
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 FDM insert
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).
5. Installation is in reverse order.
2.6.4 Draining condensate from FDM
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.
2.6.5 Draining condensate from pres-
sure vessel
Dispose of condensate in accordance with
local specifications!
Caution:
Wear safety glasses!
1. Place a suitable vessel under the conden-
sate drain.
2. In order to drain condensate, the vessel
pressure must be 2 - 3 bar.
3. Open condensate drain valve (item 09).
4. Close condensate drain valve again fol-
lowing condensate drainage.
2.6.6 Checking the oil level
• The oil level must be between the top and
bottom marks (oil dipstick/oil inspection
glass) (Figure 7a).
• Correct if necessary.
If oil is milky, it must be changed immedi-
ately.
2.6.7 Changing/adding oil
1. Allow the compressor to warm up, switch
it off, disconnect the power supply.
2. Pull out the oil filler plug/oil dipstick
(item 03), hold the used oil container un-
der the oil filler plug (item 04), screw
open the oil drain screw, drain used oil
completely.
3. Screw the oil drain screw closed.
4. Add the prescribed quantity of oil.
5. Check the oil level, correct if necessary.
Insert the oil filler plug or oil dipstick.
6. Dispose of used oil according to applica-
ble regulations.
Recommendation: mineral oil Art. No.
B111002, synthetic oil Art. No. B111006.
No guarantee can be provided if the
wrong oils are used.
Do
not
mix synthetic and mineral oil:
compressor damage is possible!
2.6.8 Checking the screw fittings
• Check that all the screw connections are
secure, and retighten them if necessary.
2.6.9 Cleaning the intake filter
See instruction manual, part 1.
Do not purge the intake opening. No for-
eign objects may enter.
Never operate the compressor without an
intake filter.
2.6.10 Checking, adjusting the V-belt
tension
V-belt driven compressors:
1. Switch off the compressor. Disconnect
the power supply.
Checking V-belt tension:
Using a suitable blunt tool (spanner wrench),
press V-belt at top centrally and downwards
between V-belt discs. It may not give more
the width of the V-belt (Figure 8a).
Adjusting V-belt tension:
1. Remove outer belt guard grating.
2. Mark the position of the electric motor on
the base plate.
3. Unscrew the mounting screws of the mo-
tor (Figure 8b).
4. Move the motor towards the compressor
unit. Take off the V-belt.
5. Push the motor approx. 2 mm parallel
past the mark. Tighten the mounting
screws.
6. Fit the V-belt over the small V-belt disc
first, then stretch it over the large V-belt
disc.
7. Check the V-belt tension and repeat the
process if necessary.
8. Install outer belt guard grating.
Summary of Contents for Universal 170-25 W
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