Wilo -Flumen OPTI-TR 22 Instrucciones De Instalación Y Funcionamiento página 31

7.7 During operation
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40
Commissioning
WARNING
Risk of injury from rotating propeller!
No persons are allowed to be present in the working area of the mixer. There is a risk of
injury!
• Secure and demarcate the working area.
• If there are no persons in the working area, activate the mixer.
• If persons enter the working area, switch off the mixer immediately.
Please regularly check the following points:
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Mixer free from deposits and encrustations.
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Connection cable is not damaged.
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Minimum water submersion ensured.
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Quiet and low-vibration running.
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Max. switching frequency not exceeded.
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Mains connection tolerances:
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Operating voltage: +/-10 %
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Frequency: +/- 2 %
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Current consumption between the individual phases: max. 5 %
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Voltage difference between the individual phases: max. 1 %
Increased current consumption
Depending on the fluid and the flow, the current consumption may vary slightly. If current
consumption is elevated for a longer period, this indicates a change in configuration. The
cause for a change in circumstances could be:
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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 in-
creasing power consumption and even overload the system!
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Insufficient mechanical pre-cleaning, e.g. fibrous and abrasive content.
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Non-homogeneous flow conditions due to fixtures or deflections in the operating space.
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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 countermeasures. CAUTION! Permanently increased
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 lead to fractures in the propeller. If the fluid temperature
may sink 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 specifi-
cations must be observed! If fluid levels fluctuate significantly, install a level monitoring de-
vice. If the fluid level drops below the minimum immersion level, switch off the mixer.
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