Wilo EMU TR 50-2 Serie Instrucciones De Instalación Y Funcionamiento página 314

en
7.7 During operation
8 Shut-down/dismantling
8.1 Personnel qualifications
314
Shut-down/dismantling
eration, the rated current should no longer be exceeded. CAUTION! If the mixer does
not start up, switch off immediately. Remove the fault before reactivating!
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It may cause burns. Allow the mo-
tor to cool down at ambient temperature after switching it off!
WARNING
The propeller blade has sharp edges!
Sharp edges can form on the propeller blades. There is a risk of limbs being severed.
Wear safety gloves to protect against cuts.
During operation, observe the locally applicable regulations on the following topics:
▪ Work safety
▪ Accident prevention
▪ Handling electrical machines
Personnel responsibilities specified by the operator must be strictly adhered to. All per-
sonnel are responsible for ensuring that responsibilities and regulations are adhered to!
▪ Operating voltage (+/-10 % 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 immersion of the propeller
▪ Quiet/low-vibration running
Increased current consumption
Depending on the fluid and the flow, the current consumption may vary slightly. If cur-
rent consumption is elevated for a longer period, this indicates a change in configura-
tion. The cause for a change in conditions could be:
▪ A change in the viscosity and density of the fluid, e.g. caused by modified addition of
polymers or precipitating agents. CAUTION! This modification may cause a severely
increasing power consumption and even overload the system!
▪ Insufficient mechanical pre-cleaning, e.g. fibrous and abrasive content.
▪ Non-homogeneous flow conditions due to fixtures or deflections in the operating
space.
▪ Vibrations due to blockage of the basin inlet/outlet and draining, modified air intake
(aeration) or the combined effect of several mixers.
Check system configuration and take counter-measures. CAUTION! Permanently in-
creased current consumption causes increased wear on the mixer! Contact customer
service for further assistance.
Monitoring fluid temperature
The fluid temperature must not drop below 3 °C. A fluid temperature below 3 °C results
in thickening of the fluid, which can result in fractures in the propeller. If the fluid tem-
perature may fall below 3 °C, install an automatic temperature measurement device
with advance warning and deactivation functions.
Monitoring minimum immersion
The propeller must not emerge from the fluid during operation. Minimum immersion
specifications must be observed! If fluid levels fluctuate significantly, install a level
monitoring device. If the fluid level drops below the minimum immersion level, switch
off the mixer.
▪ Operation/control: Operating personnel must be instructed in the functioning of the
complete system.
▪ Electrical work: A qualified electrician must carry out the electrical work.
WILO SE 2019-01