10.6.1 Option W1
External heat recovery
➤ Have the external heat recovery system checked annually by authorized KAESER Service rep‐
resentative.
10.6.2 Option W2/W3
Internal heat recovery
Precondition The power supply disconnecting device is switched off.
The disconnecting device is locked in the off position.
A check has been made that no voltage is present.
Leakage
Pressure in the cooling oil circuit is generally higher than that in the heat recovery system. If a leak
occurs, oil will run into the heat transfer medium.
1. Check the heat exchanger visually for leaks.
2. Have an authorized KAESER Service representative check the heat exchanger for internal leaks
at least once a year.
Contamination
➤ Have an authorized KAESER Service representative clean the heat exchanger as soon as a
pressure drop in the heat transfer medium is detected.
10.7 Air Filter Maintenance
Do not clean the air filter element with liquids.
Check that all sealing surfaces match each other. The use of an unsuitable air filter element
can permit dirt to ingress the pressure system and cause damage to the machine.
Material Replacement part
Precondition The power supply disconnecting device is switched off.
The disconnecting device is locked in the off position.
A check has been made that no voltage is present.
The machine has cooled down.
10 Maintenance
10.7 Air Filter Maintenance
66
Service Manual Screw Compressor
ASD T Tri-Voltage 9_5721 06 USE
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