Pagina 12 / 64
NMP Rev. 18 - Operating Instructions
EN
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 maintenan-
ce operations that require part-removing, the opera-
tor must be a qualified technician able to read sche-
mes and drawings.
It is suggest to register all maintenance operation
executed.
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 the
filter or in other particular cases.
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
Before every maintenance operations
disconnect the power supply and make sure
that the device could not accidentally operate.
Inspect and clean the strainer basket periodically.
The strainer can be easily accessed by removing the
strainer cover. With the pump located below water
level, close the suction and delivery gate valves befo-
re removing the cover.
Disinfectant or chemical products for
water treatment must not be poured
directly into the pump.
Risk of reactions and emission of harmful fumes.
Risk of corrosion in stagnant water conditions (also
with an increase in temperature and decrease of pH
value).
When the pump remains inactive it must be emp-
tied completely if there is a risk of freezing
(see
paragraph 12.2
fig. 3
).
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with
liquid.
8.2 Dismantling the system
Close the suction and delivery gate valves and
drain the pump casing before dismantling the pump.
8.3. Dismantling the pump
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump.
For dismantling and reassembly see construction in
the cross section drawing.
The motor and all internal parts can be dismantled
without removing the pump casing and pipes.
By removing the nuts (14.28) the motor can be taken
out complete with the impeller.
8.4. Pumps with IP 55 protection (Special con-
struction)
To always assure IP 55 degree of protection, it is
necessary to check the following points:
- Before starting the motors, carefully control the
position of the gasket between terminal box and its
cover. For cable of small size, use a protective
covering between cable and cable gland.
- When disassembling the end shields of the motors,
restore the existing joint using the sealing glue
LOCTITE type 510 or other equivalent sealing
system, if any, and check the perfect assembly of
the sealing ring on the shaft.
9. DISPOSAL
European Directive
2012/19/EU (WEEE)
The final disposal of the device must be done by spe-
cialized company.
Make sure the specialized company follows the clas-
sification of the material parts for the separation.
Observe the local regulations and dispose the device
accordingly with the international rules for environ-
ment protection.
10 SPARE PARTS
10.1 Spare-parts request
When ordering spare parts, please quote their desi-
gnation, position number in the cross section drawing
and rated data from the pump name plate (type, date
and serial number).
The spare parts request shall be sent to CALPEDA
S.p.A. by phone, fax, e-mail.
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IST NMP Rev18 10_2022.qxp_MXS 11_03con gall 21/09/22 12:31 Pagina 12
