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5. TRANSPORTATION AND HANDLING
The product is packed to maintain the content intact.
During transportation avoid to stack excessive weights.
Ensure that during the transportation the box cannot
move.
It is not necessary to use any special vehicle to transport
the packaged device.
The transport vehicles must comply, for the weight and
dimensions, with the chosen product (see technical cata-
logue dimensions and weights).
5.1 Handling
Handle with care, the packages must not receive
impacts.
Avoid to impact onto the package materials that could
damage the pump.
If the weight exceeds 25 Kg the package must be hand-
led by two person at the same time (see technical catalo-
gue).
6 INSTALLATION
6.1 Dimensions
For the dimensions of the device (see technical catalo-
gue dimensions and weights).
6.2 Ambient requirements and installation site
dimensions
The customer has to prepare the installation site in order
to guarantee the right installation and in order to fulfill the
device requirements (electrical supply, etc...).
The place where the device will be installed must fulfill the
requirements in the paragraph 3.2.
It's Absolutely forbidden to install the machine in an
environment with potentially explosive atmosphere.
6.3 Unpacking
i
Inspect the device in order to check any damages
which may have occurred during transportation.
Package
material,
once
discarded/recycled according to local laws of the destina-
tion country.
6.4. Installation
The pumps must be installed with the rotor axis in the hori-
zontal position and with the feet under the pump.
Provide enough clearance around the unit for motor
ventilation and for filling and draining the pump.
6.4.1. Pipes
Ensure the insides of pipes are clean and unobstructed
before 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 (par.
12.1 fig. 4).
Tighten the pipes or union coupling to the extent
sufficient to ensure a tight seal.
Excessive torque may cause damage to the pump.
When the pipe or union coupling is mounted, keep the
pump casing connection blocked with a second wrench,
making sure the connection is not deformed by
excessive tightening.
The pipe diameters must not be smaller than the pump
connections.
6.4.2. Suction pipe
For capacities over 4 m
/h use a suction pipe G 1 1/4 (DN
3
32).
The suction pipe must be perfectly airtight.
With a pump located above the water level (suction
lift operation, par. 12.1 fig. 1, fig. 3) fit a foot valve with
strainer (which must always remain immersed) or a
NG,NGL,NGX Rev. 7 - Operating Instructions
removed,
must
be
check valve on the suction connection.
If operating with flexible hoses use a semi rigid suction
hose, in order to avoid the hose narrowing due to suction
vacuum.
With the liquid level on the suction side above the
pump (inflow under positive suction head, par. 12.1 fig.
2) fit an inlet gate valve.
Follow local specifications if increasing network pressure.
Install a strainer on the suction side of the pump to
prevent foreign particles from entering the pump.
6.4.3. Delivery pipe
Fit a gate valve in the delivery pipe to adjust delivery and
head.
Install a pressure gauge.
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 ter-
minal 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 terminal 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
flexible power supply cord of the H07 RN-F type with
section of cable not less than (par. 12.3 TAB 1).
If the terminal box is provided with an inlet bushing, con-
nect 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 cur-
rent 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
device with curve D appropriate for the rated current of
the pump.
Single-phase NGM, NGXM, NGLM, are supplied with a
capacitor connected to the terminals and (for 220-240 V -
50 Hz) with an incorporated 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
OFF
ATTENTION: never run the pump dry. Start the pump
after filling it completely with liquid.
When the pump is located above the water level (suc-
tion lift operation, par. 12.1 fig. 1, fig. 3) or with a positi-
ve suction head which is too low (less than 1 m) to open
the non-return valve, fill the pump through the priming
hole (par. 12.1 fig. 5).
EN
Pagina 9 / 64
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