INSTALLATION
NA Series Operating & Instruction Manual
Page 16
Electrical connection
The electrical connection to the motor should be carried out by a properly qualified electrician, using
cable, cable glands and connection procedures suitable for the electrical load and for the location of the
installation.
All regulations governing electrical installations in HAZARDOUS AREAS must be strictly followed. It is
the responsibility of the pump user to ensure that a safe electrical installation is made and maintained.
Connecting the electric motor
1.
Isolate the electric supply cable from the power supply.
2.
Bring the cable end into the terminal box through a suitable cable gland.
3.
Follow the motor manufacturer's instructions for electrical connection. These will normally be
found inside the terminal box, either on a separate instruction sheet or attached to the inside of
the terminal box cover.
Check that the terminal links are correctly positioned for the supply voltage.
Ensure that the earth connection is properly and securely made.
Before replacing the terminal box lid, check that the sealing surfaces and the gasket or 0-ring seal are
clean and in good condition. With flameproof electric motors, the opposing metal surfaces of the
terminal box seal should be lightly greased to keep out condensation and prevent corrosion.
A proper electrical starter must be used. A starter will:
a.
prevent accidental restarts after power failure
b.
provide a safe, waterproof switch enclosure (IP55 `hose-protected' specification)
c.
protect the motor with a correctly set thermal overload cut-out: a fuse protects only the wiring
d.
withstand the heavy starting current of the motor, preventing arcing and rapid contact wear.
If there is a toothed spacer coupling between the pump and the motor, check whether it needs to be
filled with oil. Follow the coupling manufacturer's instructions as required.
Check direction of rotation
Isolate the supply
before commencing
work on the pump
WARNING! “DO NOT RUN THE PUMP DRY”
