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Any incorrect electrical connection will lead to
damage to the motor. The cable must be protected
from any dampness and must never come into
contact with the piping or with the pump.
- SINGLE-PHASE: Cable 3 x 0.75 mm
(2 phases + earth)
- 3-PHASE:
Cable 4 x 0.75 mm
(3 phases + earth)
Connection to mains (See Fig. 3 and 4)
DO NOT FORGET TO EARTH.
6. STARTING UP
6.1 Filling - Degassing
Never operate the pump when dry, even for
CAUTION!
a short time.
- Open the isolating valves on the suction and discharge
sides of the pump. Completely fill the system.
- Bleed to remove air.
6. 2 Check on direction of rotation
- Check the direction of rotation of pumps equipped with a
3-phase motor by supplying a short pulse of electric power.
The direction of rotation must comply with the information
specified on the identification plate. If it does not, invert the
two phase wires in the motor terminal block.
- Check the current draw.
- Adjust the magnetothermal protection device to the cur-
rent specified on the motor identification plate.
8 . OPERATING FAILURES
SWITCH OFF the pump before carrying out
CAUTION!
any servicing action.
FAILURES
8.1 The pump will not start.
a) The motor will not start:
b) The motor has "burned out":
8.2 No output from pump
a) Internal components are blocked by
b) Pump turns in the wrong direction:
c) Valve closed on discharge side:
8.3 Pump output is too low
a) Valve partly open on discharge side:
(or pressure is insuffi-
cient).
b) Considerable head losses:
c) Suction pipe partially blocked or
8.4 Overheating of motor.
a) Rotation difficult:
b) Incorrect supply voltage:
2
(max. 3 x 2.5 mm
2
(max. 4 x 2.5 mm
CAUSES
foreign bodies:
clogged:
7. MAINTENANCE
No specific maintenance is required during operation.
Keep the pump scrupulously clean.
The bearings are life-lubricated in accordance with the
2
)
motor's service life.
During the initial mechanical packing bedding period, there
2
)
may be slight leaks. These leaks will disappear after a few
hours in operation.
After shutdown for a long period, check that:
- the circuit and the pump are correctly filled,
- air bleeding operations have been carried out,
- the shaft rotates freely without any friction points.
CAUTION!
bly from the piping BEFORE disassembling the motor from the
hydraulic casing.
a) Check that electric current is present on the motor terminals.
b) Replace it.
a) Dismantle the pump and clean it.
b) Invert the direction of rotation by inverting the two wires on the motor terminal block
(if 3-phase).
c) Check and open the valve.
a) Open the valve gradually and completely until the pressure is stabilized.
b) Check the head loss again. (Replace the pipes with other pipes with larger diameter).
c) Check the pipe. Clean.
a) Check that it is possible to turn the motor by hand (screw or priming slot on back of
motor) .
b) Check that the voltage on the motor terminals is within the standard tolerances.
7
If the mechanical packing is replaced, it is
mandatory to disconnect the whole assem-
REMEDIAL ACTION
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