Seifert 752500B001, User Manual, Page: 24 / 27

Version No. 1-3 - 09.11.2022 Doc. No. 99752500B001 24 / 27
16. Maintenance & Cleaning
The unit should have regular functional tests (approx. every 2,000 hours depending on the grade of ambient
pollution).
17. Maintenance
Every unit is given a performance test under load at the factory. The units are largely maintenance-free,
however, the following points should be observed:
1. Fan replacement
Before replacing the fan, the equipment must be switched off from the power supply (pull out mains plug or
connecting cable). The rated life time of the fan is L10 = 30.000 hours under normal operational conditions.
Should it become necessary to replace the fan, remove the support for the fan by loosening the 4 fastening
screws. To detach the fan from the fan support loosen a further 4 screws and the fan connecting cable.
When connecting the new fan, take care that the correct polarity is maintained.
2. Controller replacement
Before replacing the controller, isolate the equipment from the power supply (pull out mains plug or connecting
cable). Detach the controller from its support by unclipping the unit and the connectors.
When connecting the new controller make sure that the correct polarity is maintained.
3. Environmental protection
If the heat exchanger has reached its end of life state, we will dispose it if it is returned to us freight paid.
4. Maintenance work on the unit
All the maintenance operations described above should only be carried out by expert personnel. All work on the
cooling circuit should only be carried out at the factory.