DAB NKV Instructions Pour L'installation Et La Maintenance page 24

9.5 Stopping
Close the interception device on the delivery pipe. If
there is a check device on the delivery pipe, the
interception valve on the delivery side may ramain
open as long as there is back.
For a long period of inactivity, close the interception
device on the intake pipe and, if supplied, all the
auxiliary control connections.
9.6 Precautions
−
The electropump should not be started an
excessive number of times in one hour.
maximum admissible value is as follows:
Type of pump
KVC - KVCX
NKV 10
NKV 15 - NKV 20
−
When the pump remains inactive for a long time at
temperatures of less than 0°C, the pump body
must be completely emptied through the drain
cap.
Check that the leakage of liquid does
not damage
especially in plants that use hot
water.
−
It is recommended to empty the pump when it is
not running for a long time at normal temperature.
−
The drain plug shall be opened until the pump will
be utilized again.
−
When restarting after long periods of inactivity it is
necessary to repeat the operations described
above in the paragraphs WARNINGS and
STARTING UP.
11. TROUBLESHOOTING.
Fault
The motor does not start and makes
no noise.
The motor does not start but makes
noise.
Maximum number of
starts per hours
30
10 15
÷
5 10
÷
persons or
Check (possible cause)
− Check the protection fuses.
− Check the electric connections.
− Check that the motor is live.
− Motor protector cut-off the motor,
for the single-phased motors, due
to over heating of tag windings.
− Check
correspond with voltage on the
pump label.
− Check the electrical connections.
− Check that all the phases are
present.
− Check for obstructions in the
pump or motor.
ENGLISH
10. MAINTENANCE
−
In normal operating conditions the electropump
does not require any kind of maintenance.
−
It is recommended to check time by time current
absorption, pressure head at closed valve and
maximum flow.
−
The electropump can only be dismantled by
specialised, skilled personnel in possession of
the qualifications required by the specific
regulations.
The
−
In any case all repair and maintenance jobs must be
carried out only after having disconnected the
pump from the power mains.
10.1Modifications and spare parts
Any modification not authorised beforehand relieves the
things,
manufacturer of all responsibility. All the spare parts
must be authentic and all the accessories must be
authorised by the manufacturer
that supply voltage
20
If the liquid has to be drained out
maintenance, ensure that the liquid
coming out cannot harm persons or
things, especially in using hot water.
The legal requirements on the disposal
of any harmful fluids must also be
complied with.
Remedy
If they are burnt-out, change them.
Correct any errors.
Wait for automatic reset of the motor
protector once the temperature has
fallen below the maximum limit.
Correct any errors.
Restore the missing phase.
Remove any obstructions.