Decommissioning - Schneider Airsystems UNM 400-10-50 W Original Bedienungsanleitung

1. The oil level must be between the top
and bottom marks (oil dipstick/oil in-
spection glass) (Figure 7a).
2. Correct if necessary.
In very unfavourable conditions, condensate
may find its way into the oil. This can be
identified by milky oil. In this case, the oil
must be changed immediately.
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 or 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.
As the mineral oil, we recommend Art.
No. B111002, synthetic oil Art. No.
B111006. Using incorrect oils shall void
the warranty.
Mixing synthetic and mineral oil can dam-
age the compressor!
2.6.8 Check screw fittings
1. Check all screw connections for tight fit
and retighten if necessary.
2. Observe the tightening torques (tighten-
ing torques calculated according to VDI
2230).
2.6.9 Clean intake filter
See Part 1 of the Instruction Manual.
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.
2. Remove the mounting plugs, take off the
belt guard grating.
Checking V-belt tension:
BAM/CPM/SUM/UNM/ZPM
Press down on the V-belt at the top using
your thumb, halfway between the V-belt
discs. It may not give more the width of the
V-belt (Figure 8a).
Adjusting V-belt tension:
1. Mark the position of the electric motor on
the base plate.
2. Unscrew the mounting screws of the mo-
tor (Figure 8b).
3. Move the motor towards the compressor
unit. Take off the V-belt.
4. Push the motor approx. 2 mm parallel
past the mark. Tighten the mounting
screws.
5. Fit the V-belt over the small V-belt disc
first, then stretch it over the large V-belt
disc.
6. Check the V-belt tension and repeat the
process if necessary.
7. Attach the belt guard grating using the
mounting plugs.
2.6.11 Cleaning/replacing the
check valve
1. Unscrew the locking screw (Figure 6a).
2. Clean the insert and seat.
3. Replace the insert in case of damage,
squeezing or hardening.
4. If the seat is damaged, replace the entire
check valve.
2.6.12 Replacing the safety valve
1. Detach the safety valve (item 11) by un-
screwing it anticlockwise.
2. Screw the new safety valve into place by
screwing it clockwise.
2.7

Decommissioning

Observe the safety instructions!
2.7.1 Preservation
Preservation of oil-lubricated compressors is
necessary if the compressor is taken out of
service for a long period (over 6 months) or
is new from the factory and will not be oper-
ated until much later.
1. Switch off the compressor. Disconnect
the power supply.
2. Allow the oil to drain. See Chap. 2.6.7.
3. Fill corrosion inhibiting oil (viscosity SAE
30). Insert the oil filler plug or oil dip-
stick.
GB
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