Electrical Connection; Startup And Operation; Maintenance - Calpeda NMP Serie Instructions Pour L'utilisation

making sure it does not move from side to side in an uncon-
trolled way, to avoid the risk of imbalance and tipping up.
6.4. Installation
GB
The NMP pumps must be installed with the rotor axis horizontal
and delivery port upwards.
Place the pump as close as possible to the suction source.
Provide clearance around the unit for motor ventilation, for
easier inspection and maintenance.
6.4.1. Pipes
Ensure the insides of pipes are clean and unobstructed befo-
re connection.
ATTENTION: The pipes connected to the pump should be
secured to rest clamps so that they do not transmit
stress, strain or vibrations to the pump.
The inside diameter of the pipe-work depends on the desired
flow.
Provide a diameter assuring a liquid flow not greater than 1.5
m/s for suction and 3 m/s for delivery.
The pipe diameters must never be smaller than the pump
connection ports.
6.4.2. Suction pipe
The suction pipe must be perfectly airtight and be led
upwards in order to avoid air pockets.
If operating with flexible hoses, use a reinforced spiral suc-
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

OFF
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 with section of
cable not less than (par. 13 TAB 1)..
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 with
curve D device 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.
Pagina 8 / 48

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 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
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 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
i
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
i
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.
NMP Rev. 16 - Operating Instructions