CSF Inox CN 2, Инструкции по установке, эксплуатации и техническому обслуживанию, Страница: 7 / 16

pag. 7
7.3 ELECTRICAL CONNECTION
Make the electrical connection only after the hydraulic connection has been completed; set up the motor
control system in conformity with the technical standards and regulations in force (EN 60204-1): in par -
ticular a manual electric power switch must be installed with adequate current switching capacity; devices
for overcurrent and overload protection (e.g. fuses, automatic switches, etc.) must also be fitted, plus, if
necessary, a device to prevent accidental restarting.
Check that the main frequency and voltage and the available power are suitable for the motor installed. All
the material used for the electrical connection (cables, cable clamps, switches and shielding) must have
a suitable level of protection for the environment in which it is installed. Be sure to use cables of sufficient
cross-section for the current shown on the motor plate so as to prevent them from overheating.
Before doing anything else, make the motor's earth connection, using the terminal on the motor and a cable
of sufficient cross-section. The cables may be connected to the terminal board using either a delta or star
arrangement. Follow the data given on the motor plate for the main voltage, as shown in the diagram in
pict.4; ensure that the terminals are clean and tight and not under stress.
When starting, the motor's current absorption increases briefly to 5-6 times the nominal value. If the mains
supply is unable to substain this increase in absorption, use a star-delta starter or other kind of device
(e.g. an autotransformer).
Pict.4
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 OPERATION
8.1 PRELIMINARY OPERATIONS
- 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 eas -
ily 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 marked direction (CLOCKWISE, as seen from the control end).
- The suction pipe and the pump must be filled with liquid. There are two possible cases:
a) When the pump is to operate with a negative suction head, it must be primed by introducing liquid into
the pump body.
b) When the pump is to operate below the level of the suction liquid, i.e. with a positive head, the suction
and discharge gate valves must be opened until the pressure gauge on the pump discharge shows a
pressure corresponding to the positive suction head.
- If the sealing chamber is to be cooled, open the cooling water supply and adjust the flow.
8.2 STARTING
- Carry out the preliminary operations, then close the discharge gate valve completely and make sure that
the suction gate valve is completely open.
- Start the pump and check once again that it rotates in the right direction.