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B-VT Rev3R - Operating Instructions
7. STARTUP AND OPERATION
7.1. Preliminary checks before start-up of the
pump
Do not start-up the device in case of damaged parts.
7.2. First starting
OFF
ATTENTION: never run the pump dry.
Start the pump only when immersed in the liquid within
the minimum and maximum depth limits.
Before starting, check that the shaft turns by hand. For
this purpose use the screwdriver notch on the shaft
end on the ventilation side.
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Slight initial rotational resistance may be due to
the reduced axial clearance of the impeller of
this type of pump; the impeller will work loose
after a short period of use.
When starting, with a three-phase motor, check
that the direction of rotation is as shown by the arrow
on the pump casing, otherwise disconnect electrical
power and reverse the connections of two phases.
Check that the pump works within its field of
performance, and that the absorbed current shown on
the name-plate is not exceeded.
Otherwise adjust the delivery gate valve or the setting
of any pressure switches.
These pumps have the maximum power input at
minimum delivery.
These pumps must never be run against
a closed valve.
Never introduce fingers in the suction opening
unless it is absolutely certain the electric power
has been disconnected (that the pump cannot be
accidentally switched on) and the impeller has stopped
rotating completely.
Do not touch the fluid and the pump when
its temperature is higher than 60 °C.
7.3. Switch off of the pump
ON
The appliance must be switch off every time
there are faults. (see troubleshooting).
The product is designed for a continuous duty, the
switch off is performed by disconnecting the power
supply by means the expected disconnecting devices.
(see paragraph “6.5 Electrical connection”).
8. MAINTENANCE
Before any operations it's necessary to disconnect the
power supply.
If required ask to an electrician or to an expert
technician.
Every maintenance operations, cleaning or
reparation executed with the electrical system
under voltage, it could cause serious injuries
to people.
If the supply cord is damaged, it must be
replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid
a hazard.
In case of extraordinary maintenance, or maintenance
operations that require part-removing, the operator
must be a qualified technician able to read schemes
and drawings.
It is suggest to register all maintenance operation
executed.
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During maintenance keep particular attention in
order to avoid the introduction of small external
parts, that could compromise the device safety.
It is forbidden to execute any operations with
the direct use of hands. Use water-resistant,
anti-cut gloves to disassemble and clean.
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During maintenance operations external
personnel is not allowed.
Maintenance operations that are not described in
this manual must be made only by special personnel
authorized by Calpeda S.p.A.
For further technical information regarding the use or
the maintenance of the device, contact Calpeda S.p.A.
8.1. Routine maintenance
OFF
Under normal operating conditions the pump will not
require maintenance.
Before every maintenance operations
disconnect the power supply and make sure
that the device could not accidentally operate.
The pump may have been immersed
in hazardous substances or products
emanating toxic gases, or may be located
in an environment which is toxic due to
other reasons; make sure all necessary
precautionary measures are taken to avoid
accidents.
Any pumps that require inspection/repair must be
drained and carefully cleaned inside and outside
before dispatch/submission.
After a long idle period, before restarting the unit,
check that the impeller is not jammed because of
incrustations, settling solids (deposit formation)
or other causes. If necessary clean with suitable
action.
If freezing may be expected while the pump remains
inactive and it is not submersed at a safe depth,
remove the pump from the water and leave in a dry
place. The pump should be securely isolated from
electrical power supply prior to its relocation.
Remove the front cover (12.00) to empty the pumps.
8.2. Dismantling the pump
OFF
Per lo smontaggio ed il rimontaggio osservare la
costruzione sul disegno in sezione.
Per lo smontaggio della girante (28.00) usare i fori
filettati di estrazione.
