During Operation - Wilo EMU FA Notice De Montage Et De Mise En Service

en
7.6

During operation

54
Commissioning
DANGER
Risk of explosion due to overpressure in the hydraulics!
If the gate valves on the suction and pressure sides are closed during operation, the
fluid in the hydraulics housing is heated up by the pumping movement. This heating
creates a pressure of several bars in the hydraulics. The pressure can result in the
pump exploding! Make sure that all gate valves are open during operation. Open
closed gate valves immediately!
WARNING
Amputation of limbs due to rotating components!
No persons must be present in the work area of the pump! There is risk of (serious)
injuries due to rotating components! No persons must be present in the work area of
the pump during start-up or operation.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It may cause burns. Allow the
pump to cool down at ambient temperature after switching it off!
NOTICE
Delivery problems due to water level being too low
If the level of the fluid is lowered too much, the volume flow can be interrupted. Air
cushions can also form in the hydraulics, which can lead to inadmissible operational
behaviour. The minimum permissible water level must reach the upper edge of the
hydraulics housing!
When operating the pump, observe the locally applicable regulations on the following
topics:
▪ Work safety
▪ Accident prevention
▪ Handling electrical machines
Strictly adhere to the responsibilities of the personnel specified by the operator. All
personnel are responsible for ensuring that the responsibilities of the personnel and the
regulations are observed!
Due to their design, centrifugal pumps have rotating parts that are easily accessible.
Depending on the operating condition, sharp edges can develop on these parts. WARN-
ING! This can lead to cuts and limbs may be amputated and severed! Check the fol-
lowing at regular intervals:
▪ Operating voltage (+/-10 % of the rated voltage)
▪ Frequency (+/-2 % of the rated frequency)
▪ Power consumption between individual phases (max. 5 %)
▪ Voltage difference between the individual phases (max. 1 %)
▪ Max. switching frequency
▪ Minimum water submersion depending on the operating mode
▪ Inlet: no air intake
▪ Level control device/dry-running protection: Switching points
▪ Quiet/low-vibration running
▪ All gate valves open
Operation in the limit range
The pump can briefly be operated in the limit range (max. 15 min/day). During operation
in the limit range, expect relatively large deviations from the operating data. NO-
TICE! Continuous duty in the limit range is prohibited! The pump is exposed to high
wear and there is a greater risk of failure!
The following parameters apply during operation in the limit range:
▪ Operating voltage (+/-10 % of the rated voltage)
▪ Frequency (+3/-5 % of the rated frequency)
WILO SE 2018-02