Inhoudsopgave
Advertenties
For explosion-proof pumps the electrical and equipotential connection must be made according to standard EN
60079-14.
Before installation and the first start-up of the pump, check the condition of the cable visually to avoid short circuits.
If the power cable is damaged, it must be replaced by the manufacturer's service centre or by another qualified person.
On explosion-proof pumps, make sure that an external earth conductor is connected to the external earth terminal on
the pump.
The section of the earth lead must be at least 4mm², yellow/green.
Make sure that the earth connection is protected from corrosion.
Make sure that all protective equipment has been connected correctly.
Float switches used in potentially explosive environments must be approved for this application.
Set the motor-protective circuit breaker to the rated current of the pump. The rated current is stated on the pump
nameplate.
The supply voltage and frequency are marked on the pump nameplate. The voltage tolerance must be within - 10 %/+ 10 % of the rated
voltage. Make sure that the motor is suitable for the power supply available at the installation site.
All the pumps are supplied with a 10 m cable and a free cable end.
For greater lengths contact the DAB Pumps technical assistance service.
The connections of the pump protection system, such as thermal protections and oil-in-water sensor, are to be provided by the user, who
must use a control panel with suitable characteristics.
6.1
Wiring diagrams
See Fig.15a and 15b
6.2
Thermal switch
All FX RANGE pumps have thermal protection incorporated in the stator windings (see wiring diagrams, contacts k1, k2) See parag. 6.1.
In some motors the thermal switches are fitted inside and in series with the motor winding and intervene by opening and interrupting the
circuit when an excessive temperature is reached in the windings (about 150°C).
In some motors, the thermal switches are fitted inside the motor windings and it is recommended to connect the 2 output wires (white K1-
K2) to a device with a coil located inside a control panel. They intervene by opening and interrupting the circuit when an excessive
temperature is reached in the windings (about 150°C).
Non explosion-proof pumps
For correct operation the thermal switch must be connected to a device for interrupting the power supply circuit of the
electropump. When the electropump has cooled, once the circuit of the thermal switch has been reset, the device can
automatically restart the pump.
Explosion-proof pumps
The device for interrupting the power supply circuit of explosion-proof pumps must not restart the pump
automatically. This ensures protection against over temperature in potentially explosive environments.
7. START-UP
Before starting work on the pump, check that the main switch is off.
It must be ensured that the power supply cannot be accidentally switched on.
Make sure that all protective equipment has been connected correctly.
The pump must not run dry.
The pump must not be started if the atmosphere in the tank is potentially explosive.
Before starting the pump, check that it is suitably connected to the pumping system to avoid uncontrolled leakage of
liquid.
Do not put your hands or any tool into the pump suction or discharge port after the pump has been connected to the
power supply.
7.1
General start-up procedure
This procedure applies to new installations as well as after service inspections if start-up takes place some time after the pump was placed
in the tank.
After long periods of storage, check the conditions of the oil in the oil chamber. See also section 8.1 Routine maintenance.
-
ENGLISH
14
Advertenties
Hoofdstukken
Inhoudsopgave
