Schneider Airsystems SEM 255-10-50 W, Original Operating Manual

Page: 29 / 74

SEM
II/11
GB
2.6.1 Before each maintenance
task
1. Swtich on the compressor at the ON/OFF
switch (item 10). Disconnect the power
supply.
2. Depressurise the compressor: using the
blow gun, blow out all pressure from the
vessel.
3. Open/Remove the sound absorbing cov-
er.
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 filter pressure re-
ducer insert
1. Depressurise the vessel of the filter pres-
sure reducer.
2. Hold a suitable vessel under the conden-
sate drain. Drain condensate.
3. Remove the vessel of the filter pressure
reducer. Unscrew the mounting screw of
the filter insert by screwing anticlockwise
(Figure 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
filter pressure reducer
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
pressure vessel
L
Condensate is a water pollutant. Dispose
of it according to applicable regulations!
1. Place a suitable vessel under the conden-
sate drain.
2. To drain condensate, the pressure may
be no more than 2 bar.
3. Open the condensate drain valve
(item 09): rotate 1 1/2 turns anticlock-
wise.
4. Rotate the condensate drain valve clock-
wise to block it.
2.6.6 Checking the oil level
For compressors with an oil dipstick, pull the
dipstick out.
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
On compressors with an oil drain channel,
position the channel under the oil drain
screw.
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).
3. Hold an old oil container under the oil
drain screw or the end of the oil drain
channel, unscrew the oil drain screw and
allow the old oil to drain completely.
500 h After 1 year Change oil (mineral oil) 2.6.7
Change intake filter 2.6.9
Change check valve and insert 2.6.10
Check screw connections 2.6.8
1,000 h After 2 years Change oil (synthetic oil) 2.6.7
2,500 h After 5 years Change safety valve 2.6.11
Interval No later than Tasks See
chap-
ter