Switch Off Of The Pump - Calpeda NR Instructions Pour L'utilisation

7.3 Switch off of the pump

ON
EN
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 devi-
ces. (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 techni-
cian.
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 execu-
ted.
During maintenance keep particular attention
i
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
i
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 (Standard construction)
OFF
Before every
disconnect the power supply and make sure
that the device could not accidentally operate.
Burn hazard. Due to high temperature of
the fluid, the pump casing and the motor
may reach temperatures higher than 50°C.
DO NOT TOUCH these parts unless with
suitable protective devices or wait and
make sure they have completely cooled.
When the pump remains inactive it must be emptied
completely if there is a risk of freezing.
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
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maintenance operations
8.1.1 Routine maintenance (Special construction)
OFF
Before every
disconnect the power supply and make sure
that the device could not accidentally operate.
Burn hazard. Due to high temperature of
the fluid, the pump casing and the motor
may reach temperatures higher than 50°C.
DO NOT TOUCH these parts unless with
suitable protective devices or wait and
make sure they have completely cooled.
When the pump remains inactive it must be emptied
completely if there is a risk of freezing.
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
8.2 Blind flanges for mod. NRD, NRD4
If maintenance needs to be carried out on one of the
pump units, a coupling flange (optional) can be fitted to
run the other pump unit in the meantime.
8.3 Dismantling the system
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump.
8.4. Dismantling the pump
OFF
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.
8.5. Pumps with IP 55 protection
OFF
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
OFF
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.
NR(D), NR(D)4 Rev. 15 - Operating Instructions
maintenance operations