Wilo 2.0-VE 22-36-52, Installation And Operating Instructions Manual

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Maintenance en
Installation and operating instructions Wilo-Helix V, FIRST V, 2.0-VE 22-36-52 21
WARNING
Risk of injury!
When the pump runs, coupling guards must be in place, tightened with all appropri-
ate screws.
WARNING
important noise
Noise emitted by most powerful pumps could be very high : protection must be used
in case of long stay close to the pump.
CAUTION
Possible damage of the pump
Installation must be designed in order that no one could be hurt in case of fluid leak-
age (mechanical seal failure …).
9 Maintenance
All servicing should be performed by an authorized service representative !
DANGER
Electrical shock hazard!
Dangers caused by electrical energy must be excluded.
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.
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These pumps are maintenance free. Nevertheless a regular check is recommended
every 15 000 hours.
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In option, mechanical seal could be easily replace on some models thanks to its
cartridge seal design.
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In case of pump with half flanges design and installation again after maintenance
operation, it is suggested to add plastic link to maintain in easy way the half
flanges together.
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For pumps equipped with one grease feeder (Fig. 7, item 1), respect lubrication fre-
quences mentioned on sticker (Fig. 7, item 2).
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Insert its adjusting wedge in its housing (Fig. 6) once mechanical seal position is
set.
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Always keep the pump perfectly clean.
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Pumps which are not being used during periods of frost should be drained to avoid
damage: Close the guard valves, open completely the drain-priming plug and the
air bleed screw.
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Service life: 10 years depending on the operating conditions and whether all re-
quirements described in the operation manual have been met.