KAESER SK Series, Operating Manual

Page: 81 / 132

Fig. 28 Changing the cooling oil, oil separator tank
1
Hose coupling (air cooler venting)
2
Pressure gauge
3
Hose coupling (oil separator tank venting)
4
Oil filler port with plug
5
Cooling oil level indicator.
6
Plug-in nozzle
7
Shut-off valve
A
Shut-off valve open
B
Shut-off valve closed
8
Maintenance hose
9
Hose coupling (oil drainage)
10
Shut-off valve (venting line)
11
Shut-off valve (oil drainage)
Changing the oil with internal pressure Oil change with an external compressed air
source
The machine has been running at least 5 mi‐
nutes in LOAD mode.
The machine is fully vented,
the pressure gauge on the oil separator tank
reads 0 bar.
1. Close the shut-off valve
10
in the venting
line.
2. Start the machine and watch the oil separa‐
tor tank pressure gauge
2
until it reads 3–
5 bar.
3. Switch off the machine.
4. Wait at least 2 minutes to allow the oil to
flow back to the separator tank.
Cut-off the electrical power supply via the power
supply isolating device,
ensure that the device is locked off,
verify the absence of any voltage.
The machine is fully vented,
the pressure gauge on the oil separator tank
reads 0 bar.
An external source of compressed air is availa‐
ble.
1. Close the shut-off valve
10
in the venting
line.
2. With the shut-off valve closed, insert the
plug-in nozzle
6
into the hose coupling
3
.
3. Connect the maintenance hose to the exter‐
nal air supply.
4. Open the shut-off valve
7
until the pressure
gauge on the oil separator tank reads 3–
5 bar.
5. Close the shut-off valve
7
and remove the
male hose fitting from the coupling.
10 Maintenance
10.16 Changing the cooling oil
901848 21 E
Operating Manual Rotary screw compressor
SK
71