Wilo T72 Instrucciones De Instalación Y Funcionamiento página 220

en
7.7 During operation
220
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
Pumping problems due to water level being too low
If the fluid is lowered too much, separation of the volume flow may occur. Further-
more, air cushions may form in the hydraulic system, resulting in undesirable beha-
viour during operation. 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:
▪ Workplace safety
▪ Accident prevention
▪ Handling electrical machines
Strictly comply with the personnel responsibilities specified by the operator. All person-
nel are responsible for ensuring compliance with responsibilities and regulations!
Due to their design, centrifugal pumps have rotating parts that are easily accessible.
Depending on operating conditions, sharp edges can develop on these parts. WARN-
ING! This can lead to cuts and limbs may be severed! Check the following points at
regular intervals:
Motors T 12, T 13, T 17, T 17.2, T 20, T 20.1, T 24, T 30, T 34, T 42
▪ 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
Motors T 49, T 50.1, T 56, T 57, T 63.x, T 72
▪ Operating voltage (+/- 5 % of the rated voltage)
▪ Frequency (+/- 2 % of the rated frequency)
▪ Current 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
WILO SE 2019-01