Maintenance - Wilo -Helix V FIRST V 2.0-VE 2 Installation And Operating Instructions Manual

9

Maintenance

Installation and operating instructions Wilo-Helix V, FIRST V, 2.0-VE 2-4-6-10-16
Maintenance
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 ...).
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.
ƒ
These pumps are maintenance free. Nevertheless a regular check is recommended
every 15 000 hours.
ƒ
In option, mechanical seal could be easily replace on some models thanks to its
cartridge seal design. Insert its adjusting wedge in its housing (Fig. 6) once mech-
anical seal position is set.
ƒ
Always keep the pump perfectly clean.
ƒ
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.
ƒ
Service life: 10 years depending on the operating conditions and whether all re-
quirements described in the operation manual have been met.
en
19