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N, N4 Rev. 13 - Operating Instructions
GB
After alignment procedure,
before staring the
pump attatch the coupling guard
(safety
protection against accidental contact).
6.4.8. Oil-filler (on request)
The installation of a constant level oil-filler (as
option) permits a correct lubricating oil level in order
to avoid recurrent fills.
Check that the oil filler is installed in vertical posi-
tion.
Filling indications:
1) Fill the horizontal part of the oil filler up to the
upper level of the inner hole
2) Completely fill the tank and close it.
ATTENTION: It is possible that during the
handling phases, for its nature, the oil filler
could have some small oil leakages.
The subsequent fills must be made pouring the oil
directly into the ampoule and not through the oil-filler
elbow or oil-filler support plug.
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 nameplate
specifications and the operating instructions (if avai-
lable) of the motor.
ATTENTION: with motor power rating ≥ 5.5 kW avoid
direct starting. Provide a control panel with star-
delta starting or an other starting device.
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. 13.3 TAB 1).
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 protec-
tion device appropriate for the rated current of the
pump.
6.6 Operation with frequency converter
Adjust the frequency converter so that the limiting
values of min. 25 Hz and max. f
N
Hz will not be
exceeded.
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 filling it completely with liquid.
When the pump is located above the water level
(suction lift operation) fill the suction pipe and the
pump through the priming hole
Fig. 8
.
When the liquid level on the suction side is above
the pump
(inflow under positive suction head), fill
the pump by opening the suction gate valve slowly
and completely, keeping the delivery gate valve open
to release the air.
Check that the shaft turns by hand.
With a three-phase motor check that the direction
of rotation
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 perfor-
mance, and that the absorbed current shown on the
name-plate is not exceeded.
Otherwise adjust the delivery gate valve or the set-
ting of any pressure switches.
Do not touch the fluid when its temperature
is higher than 50 °C.
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.
7.2.1 Starting Pumps with packing seal
First loosen the gland slightly so that the seal is
decompressed.
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 devi-
ces. (see paragraph "6.5 Electrical connection").
OFF
OFF
ON
4.93.141
Fig. 8 Filling.
IST N_N4 09_2018_Rev13_MXS 11_03con gall 10/09/18 10:52 Pagina 16
