pag. 9
Pict
.2
Lower
voltage
Higher
voltage
C.S.F. Inox S.p.A. will accept no responsibility for damage to property and/or injury to persons caused
by failure to comply with technical standards and regulations in force.
8
NON-PERMITTED USES
Do not use the pump with a suction pressure greater than the specified value (0.5 times the discharge
head generated by the pump).
The pump must always be used in an environment appropriate to the level of protection of the motor.
Always check this on the motor plate before installation.
WARNING
THE PUMP MAY NOT BE USED IN ENVIRONMENTS WHICH REQUIRE A HIGHER
LEVEL OF PROTECTION OR A HIGHER SPECIFICATION MOTOR OR ELECTRICAL PARTS.
Components complying with the safety standards for the environment in question must be used.
9
OPERATION
9.1 PRELIMINARY OPERATIONS AND STARTING
When first starting, fill the pump with liquid so as to create the pressure drop required for suction.
When starting subsequently the quantity of liquid that remains in the pump will be sufficient to ensure
self-priming even if the pipe is empty. Make sure that the pump does not become completely empty
in the event of installation under a vacuum or to a siphon. If necessary, fit a check valve.
- Check that the pump turns freely under hand pressure.
- Check that the clamp joining the pump casing and the cover is well tightened and that it cannot
be easily unscrewed by hand.
The tightening of the clamp must be carried out by means of a key
and NOT by hand.
- Check that the pump turns in the market direction.
- Check that any gate valves installed on the suction and discharge pipelines are open.
- Start the pump and check the turns direction; before restarting it is extremely important to wait until
the pump has stopped moving completely.
9.2 OPERATING CHECKS
- If the pump does not generate the required discharge head rapidly, facilitate priming by stopping
the pump and adding liquid.
- Check that the absorption of the motor does not exceed the value specified on the plate.
- The pump must always work smoothly and without vibrations.
- Do not operate without liquid and in any case avoid prolonged operation with the discarge gate valve
closed.
WARNING
WITH SERIES AS PUMPS NEVER CLOSE DISCHARGE SIDE COMPLETELY.
- Mechanical seal: check that there is no leakage along the shaft.
9.3 WORKING IRREGULARITIES
The pump does not prime
- Air has entered the suction piping; check the seals on the fittings and tighten them sufficiently.
- Suction pipe not submerged in liquid.
- Clearances between impeller/cover and impeller/body have increased. Check and correct.
- No liquid in the pump. Introduce liquid.
- Reduce loss of suction head; reduce the suction height.
- Formation of air pockets; eliminate and if necessary fit an air unloader on discharge.
No flow
- Pump not primed; (see point 8 and previous point).
- Pump turning in wrong direction.
- Suction port obstructed.
- On-off valves closed.