Calpeda NMP Operating Instructions Manual - page 8
Pagina 8 / 48
NMP Rev. 14 - Operating Instructions
GB
tion hose in order to avoid hose narrowing due to a suction
vacuum.
With a
pump located above the water level
(suction lift ope-
ration), fit a
foot valve
or a
check valve
on the suction con-
nection.
With
a pump located below water level
(inflow under positi-
ve suction head) install a gate valve.
6.4.3. Delivery pipe
Fit a gate valve in the delivery pipe to adjust delivery, head,
and absorbed power.
Install a pressure gauge.
With a geodetic head of over 15 m fit a check valve between
the pump and the gate valve in order to protect the pump
from water hammering.
6.5 Electrical connection
Electrical connection must be carried out only by a
qualified electrician in accordance with local
regulations.
Follow all safety standards.
The unit must be properly earthed (grounded).
Connect the earthing (grounding) conductor to the terminal
with the
marking.
Compare the frequency and mains voltage with the name-
plate data and connect the supply conductors to the terminals
in accordance with the appropriate diagram inside the termi-
nal box cover.
ATTENTION: never allow washers or other metal
parts to fall into the internal cable opening between
the terminal box and stator.
If this occurs, dismantle
the motor to recover the object which has fallen inside.
If the terminal box is provided with an inlet gland, use a flexi-
ble power supply cord of the H07 RN-F type.
If the terminal box is provided with an inlet bushing, connect
the power supply cord through a conduit.
For use in swimming pools (not when persons are in the
pool), garden ponds and similar places, a
residual current
device
with IΔN not exceeding 30 mA must be installed in
the supply circuit.
Install a
device for disconnection from the mains
(switch)
with a contact separation of at least 3 mm in all poles.
With a three-phase motor install an overload protection devi-
ce appropriate for the rated current of the pump.
Single-phase NMPM,
are supplied with a capacitor connec-
ted to the terminals and (for 220-240 V - 50 Hz) with an incor-
porated thermal protector.
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
ATTENTION: never run the pump dry.
Start the pump after fil-
ling it completely with liquid.
When the pump is located above the water level
(suction
lift operation) fill the pump with water up to suction pipe level
through the opening on the strainer after removing the cover
(fig. 2).
ATTENTION: for transportation the cover is temporarily
closed with hexagon nuts.
Replace them with the hand knobs (15.12) located inside
the filter.
When operating with the pump below water level
(inflow
under positive suction head), fill the pump by opening the
suction gate valve slowly and completely, keeping the deli-
very gate valve open to release the air.
With a three-phase motor check that the direction of rota-
tion
is as shown by the arrow on the pump casing, otherwise,
disconnect electrical power and reverse the connections of
two phases.
With a suction lift operation it may be necessary to wait a few
minutes for the pump to prime.
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.
7.3 Switch off of the pump
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.
In case of extraordinary maintenance, or maintenance opera-
tions that require part-removing, the operator must be a quali-
fied technician able to read schemes 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 suc-
tion and delivery gate valves before 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 emptied com-
pletely 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.
OFF
OFF
ON
i
i
OFF
IST NMP 09_2014:MXS 11_03con gall 09/09/14 08.43 Pagina 8