1. Check the cooler visually for leaks.
2. Have an authorized KAESER Service representative check the cooler for internal leaks at least
once a year.
Cleaning
➤ An authorized KAESER Service representative should clean the cooler when the airend dis‐
charge temperature is 10 K above the annual average.
10.7 Option W1/W2/W3
Maintain the heat recovery system
Deposits in the heat exchanger can significantly reduce its capacity to transfer heat.
Check the heat exchanger regularly for leaks and contamination. Frequency of checking is dependant
on the characteristics of the heat transfer medium.
➤ Have the external heat recovery system checked annually by KAESER Service.
10.7.1 Option W1
External heat recovery system
➤ Have the external heat recovery system checked annually by KAESER Service.
10.7.2 Option W2/W3
Internal heat recovery
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-receiving medium. Increased cooling oil loss can indicate a leaking
heat exchanger.
Precondition The power supply isolating device is switched off,
the device is locked off,
a check has been made that no voltage is present.
1. Check the heat exchanger visually for leaks.
2. Have KAESER Service check the heat exchanger for internal leaks and clean if contaminated.
10.8 Air Filter Maintenance
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.
Do not clean the air filter element with liquids.
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 Maintain the heat recovery system
9_5708 08 USE
Service Manual Screw Compressor
BSD
69
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