2. Open the user's shut-off valve at the inlet and outlet ends.
3. After approx. 10 minutes of operation: Check the cooling oil level and top up if necessary.
4. Switch off the machine and check visually for leaks.
10.16 Changing the cooling oil
Drain the oil completely from the following components:
■ Oil separator tank
■ Oil cooler
■ Compressor block
➤ Always change the oil filter and oil separator cartridge when changing the oil.
➤ Contact KAESER Service if condensate is detected in the cooling oil. It is necessary to
adjust the airend discharge temperature to suit operating conditions.
Gas pressure helps to expel the oil. This compressed gas can be taken either from the compressor
itself or from an external source.
An external source of compressed gas is necessary in the following cases:
■ The machine is not operational.
■ The machine is to be restarted after a long period of standstill.
The machine must be isolated from the gas network and completely vented before undertak‐
ing any work on the pressure system.
Material Cooling oil
Cooling oil receptacle
The maintenance hose with hose coupling and shut-off valve is stowed beneath the oil separator
tank.
CAUTION
There is risk of burns from hot components and oil!
➤ Wear long-sleeved clothing and gloves.
10 Maintenance
10.16 Changing the cooling oil
70
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2 ESD_2C_10357405_10–LIN_00 E
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