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5 Operation
5 Operation
5.1 Precautions
Before taking the unit into operation, check the following:
• All recommended safety devices are installed.
• The cable and cable entry have not been damaged.
• All debris and waste material has been removed.
NOTICE:
Never operate the pump with the discharge line blocked, or the discharge valve closed.
WARNING: Crush Hazard
Risk of automatic restart.
Distance to wet areas
WARNING: Electrical Hazard
Risk of electrical shock or burn. You must connect an additional ground- (earth-) fault
protection device to the grounded (earthed) connectors if persons are likely to come into
contact with liquids that are also in contact with the pump or pumped liquid.
CAUTION: Electrical Hazard
Risk of electrical shock or burn. The equipment manufacturer has not evaluated this unit for
use in swimming pools. If used in connection with swimming pools then special safety
regulations apply.
5.2 Noise level
In certain installations and at certain operating points on the pump performance curve, the
sound pressure level can exceed 70 dB(A). Pumps with power output greater than 30 kW, as
shown in the diagram below, may have a sound pressure level between 70 dB(A) and
maximum 85 dB(A) at the best efficiency point.
Make sure that you understand the noise level requirements in the environment where the
product is installed. Failure to do so may result in hearing loss or violation of local laws.
Figure 19: Sound pressure
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85
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55
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10
100
kW
P7900 Installation, Operation, and Maintenance Manual
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