Xylem HYDROVAR HV 4.150 / 4.185 / 4.220 - Manual (Page 99)

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Maintenance
The HYDROVAR does not require any special maintenance.
However, the cooling fan and the vents should be free of dust. Also the temperature
around the unit should be checked from time to time.
All modifications must be done by qualified personnel! For mounting and repairs at the
HYDROVAR, qualified service technicians are available.
Demounting:
The HYDROVAR must be disconnected from the power supply before any work can be
carried out. Consider the pump- and motor-instruction.
Please wear
your personal protection equipment.
For further information, please ask your distributor!