Fig. 24 Checking the cooling oil level
1
Minimum oil level
2
Maximum oil level
3
Optimum oil level
➤ Check the oil level with machine running under LOAD.
Result As soon as the minimum level is reached: Replenish the cooling oil.
10.13 Venting the machine (de-pressurising)
Venting takes place in three stages:
■ Isolate the compressor from the air system.
■ Vent the oil separator tank.
■ Manually vent the air cooler.
The machine must be isolated from the compressed air network and completely vented be‐
fore undertaking any work on the pressure system.
Material The maintenance hose with hose coupling and shut-off valve needed for venting is stowed beneath
the oil separator tank.
Precondition The power supply isolating device is switched off,
the device is locked off,
the absence of any voltage has been verified.
CAUTION
Escaping oil mist is damaging to health.
➤ Do not direct the maintenance hose at persons while venting.
➤ Do not inhale the oil mist.
10 Maintenance
10.13 Venting the machine (de-pressurising)
70
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC
9_5717 20 E