Operation
Precautions
WARNING:
• Never operate the pump without safety devices installed.
• Never operate the pump with the discharge valve closed.
• Make sure you have a clear path of retreat.
• Never work alone.
CAUTION:
If the pump is equipped with automatic level control and/or internal contactor, there is a
risk of sudden restart.
Distance to wet areas
Electrical Hazard:
Risk of electrical shock. Make sure no one gets closer than 20 m (65 ft.) to the unit when
being in contact with the pumped or mixed liquid.
Noise level
NOTICE:
The noise level of the product is lower than 70 dB. However, the noise level of 70 dB may
be exceeded in some installations and at certain operating points on the performance
curve. Make sure that you understand the noise level requirements in the environment
where the pump is installed. Failure to do so may result in hearing loss or violation of local
laws.
Start the pump
WARNING:
• If you need to work on the pump, make sure that it is isolated from the power supply and
cannot be energized.
• Make sure that the unit cannot roll or fall over and injure people or damage property.
• In some installations, the pump and the surrounding liquid may be hot. Bear in mind the
risk of burn injuries.
• Make sure nobody is close to the unit when it is started. The unit will jerk in the opposite
direction of the impeller rotation.
NOTICE:
Make sure that the rotation of the impeller is correct. For more information, see Check the
impeller rotation.
1. Check the oil level in the oil housing.
2. Remove the fuses or open the circuit breaker, and check that the impeller can be
rotated freely.
Operation
32
Flygt 5520 Installation, Operation, and Maintenance Manual
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