2.
OPERATION
IOM manual CTS self-priming pumps
11
2.
OPERATION
2.1.
Start-up
Check manually that the motor is free to turn, moving the motor cooling fan.
Make sure that the piping is not clogged and is free from residues or foreign objects.
Make sure that the liquid flows regularly into the pump.
The pump casing must be filled with liquid. The minimum water level is:
240 mm ±5 (
9,5
± 0,2
inch
) or 7 dm
3
(
1,54 UK gal
) for CTS C pumps
300 mm
±5 (
11,8
± 0,2
inch
) or 11,8 dm
3
(
2,6 UK gal
) for CTS D, E pumps
The suction shut-off valve (if any) must be completely open.
The shut-off / regulation valve on the discharge side must be opened.
The motor must turn in the same direction as the arrow shown on the pump. The
direction of rotation is always clockwise looking at the pump from the motor side;
check by starting briefly, then looking at the direction of rotation of the motor fan
through the fan lid. If it is wrong, the motor must be stopped immediately. Change the
connection to the terminals of the electric motor (chapter
1.8 “Motor connection”
) and
repeat the procedure described above.
Any auxiliary connections must all be connected.
When restarting the pump, make sure to drain the discharge line. It is important that
during self-priming there is no back pressure, so the air can easily escape the pump
casing.
If the pump is equipped with an oil reservoir, make sure to fill it before start-up.
2.1.1.
Starting the pump
Start the electric motor.
The discharge shut-off / regulation valve must be completely
opened.
If the pressure shown on the pressure gauge on the discharge piping does not increase,
turn off the pump immediately and release pressure carefully. Repeat the connection
procedure.
If there are changes of flow rate, head, density, temperature or viscosity of the liquid, stop
the pump and get in touch with our technical service.
2.1.2.
Restarting after power shut-off
In case of accidental stopping, make sure that the non-return valve has prevented backflow
and check that the motor cooling fan has stopped. Start the pump again following the
instructions of chapter
2.1.1 ”Starting the pump”.
