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.
Noise level
NOTICE:
The sound power level of the product is lower than 70 dB(A). However, in some
installations the resulting sound pressure level may exceed 70 dB(A) at certain operating
points on the performance curve. 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.
5.2 Estimate zinc anode replacement intervals
The mass and surface area of the zinc anodes are designed to protect the pump surface
for 1 year in sea water with an average temperature of 20°C (68°F). Shorter inspection
intervals and anode replacement can be required, depending upon the water
temperature and the chemical composition as well as the presence of other metals in the
vicinity of the pump.
The rate of zinc consumption, and the appropriate inspection intervals, can be estimated
by measuring how much zinc is consumed during the first two months following
installation.
Anodes are replaced when the anode mass is reduced to a selected fraction of its initial
mass. The recommended interval for the selection fraction is 0.25–0.50 (25–50%).
1.
Remove, weigh, and reinstall one or more of the exterior zinc anodes before starting
up the pump.
2. After two months, remove and weigh the same zinc anode or anodes again.
5 Operation
Flygt 3102 Installation, Operation, and Maintenance Manual 41
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