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Remember that the starting current in direct on-line
starting can be up to six times higher than the rated
current. Make sure that the fuses or circuit breakers
are of the proper rating.
The Parts List gives rated current. Fuse rating and
cable shall be selected in accordance with local rules
and regulations. Note that with long cables, the
voltage drop in the cable must be taken into consider-
ation, since the motor’s rated voltage is the voltage
that is measured at the terminal board in the pump.
The overload protection (motor protection breaker) for
direct on-line starting shall be set to the motor rated
current as given on the data plate.
Check the phase sequence in the mains with the
phase sequence indicator.
If intermittent operation is prescribed (see Data Plate),
the pump shall be provided with control equipment
that provides such operation.
Single phase operation
The Flygt single phase pumps must be equipped with a
starter which has start and run capacitors.
A special Flygt designed starter is required for the
operation of single phase pumps. The connection of
the motor cable to the starter is shown in the wiring
diagram.
NOTE! It is not possible to change the direction of
rotation of a single phase pump by changing the cable
conductors on the starter. Please contact your nearest
Flygt representative.
Monitoring equipment
A plate in the junction box shows if the pump is
equipped with sensors.
CLS-30 is a leakage sensor for sensing water in the
oil housing and initiates an alarm when the oil
contains 30% water. Oil change is recommended after
the alarm. If the sensor initiates an alarm shortly after
the oil is changed, contact your nearest Flygt represen-
tative. The CLS sensor is installed in the bearing hous-
ing and goes down into the oil housing. The sensor is
not applicable to Ex-approved pumps.
CLS sensor body made of glass.
Handle with care.
The FLS sensor consists of a small float switch for
sensing water in the stator housing. Its design makes
it suitable for pumps in vertical installations. The FLS
sensor is installed in the bottom of the stator housing.
The two sensors, CLS and FLS, can be used in the
same pump. They are connected in parallel. Follow
the instructions for monitoring equipment.
The MiniCas II is a monitoring relay to which CLS
and/or FLS are connected.
Check:
— signals and tripping function.
— that relays, lamps, fuses and connections are
intact.
Replace defective equipment.
ELECTRICAL CONNECTIONS
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