Isolating the machine from the air system
➤ Close the user's shut-off valve between the machine and the air distribution network.
If no shut-off valve is provided by the user, the complete air network must be vented.
Venting the oil separator tank
The oil circulation vents automatically as soon as the machine is stopped.
➤ Check that the oil separator tank pressure gauge reads 0 bar.
The pressure gauge does not read 0 bar after automatic venting?
➤ Make sure that the shut-off valve is closed or that the complete air system is vented.
➤ With the shut-off valve closed, insert the male hose fitting 6 into the hose coupling 3 .
➤ Slowly open the shut-off valve 7 to release pressure.
➤ Disconnect the male hose fitting 6 and close the shut-off valve 7 .
➤ If manual venting does not bring the oil separator tank pressure gauge to zero: Contact
the KAESER Service.
Manually venting the air cooler
After shutting down the compressor and venting the oil separator tank, the machine is still un‐
der pressure from the air system or the section from the shut-off valve to the minimum pres‐
sure/check valve.
1. With the shut-off valve closed, insert the male hose fitting 6 into the hose coupling 1 .
2. Slowly open the shut-off valve 7 to release pressure.
3. Disconnect the male hose fitting 6 and close the shut-off valve 7 .
10.14.2 Topping up with cooling oil and trial run
Replenishing the cooling oil
A sticker on the oil separator tank specifies the type of oil used.
1. WARNING!
Compressed air!
Compressed air and devices under pressure can injure or cause death if the contained energy
is released suddenly.
➤ De-pressurise all pressurised components and enclosures.
2.
NOTICE!
The machine could be damaged by unsuitable oil!
➤ Never mix different types of oil.
➤ Never top up with a different type of oil to that already used in the machine.
3. Slowly unscrew the filler plug 4 .
4. Top up to bring the oil to the correct level.
5. Renew the filler plug's gasket if necessary and screw the plug into the filler port.
Starting the machine and carrying out a trial run
1. Close all access doors, replace and secure all removable panels.
10 Maintenance
10.14 Replenishing the cooling oil
9_5717 20 E
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC
73
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