Maintenance - Wilo -Zeox FIRST Installation And Operating Instructions Manual

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9 Maintenance

All servicing should be performed by an authorized service representative!
WARNING! Electrical shock hazard!
Danger from electrical current must be eliminated.
• All electrical work must be performed after the electrical supply has been switched off
and secured against unauthorized switching.
WARNING! Risk of scalding!
At high water temperatures and system pressure close isolating valves before and
after the pump.
First, allow pump to cool down.
Before performing any disassembly and/or maintenance operation it is necessary to
empty the pump.
WARNING! Risk of scalding!
When the pump remains inactive for long periods, particularly during the winter, drain
out the water to prevent freezing problems.
It is advisable to protect the rotating internal parts with antirust oil and to rotate peri-
odically the pump shaft by hand.
34 WILO SE 11/2014