DAB KVC Operating and maintenance manual

ISTRUZIONI PER L'INSTALLAZIONE E LA MANUTENZIONE (IT)
INSTRUCTIONS POUR L’INSTALLATION ET LA MAINTENANCE (FR)
INSTRUCTIONS FOR INSTALLATION AND MAINTENANCE (GB)
INSTALLATIONS- UND WARTUNGSANLEITUNGEN (DE)
INSTALLATIE- EN ONDERHOUDSINSTRUCTIES (NL)
INSTRUCCIONES DE INSTALACIÓN Y MANTENIMIENTO (ES)
INSTALLATIONS- OCH UNDERHÅLLSANVISNINGAR (SE)
ΟΔΗΓΙΕΣ ΓΙΑ ΤΗΝ ΕΓΚΑΤΑΣΤΑΣΗ ΚΑΙ ΣΥΝΤΗΡΗΣΗ (GR)
KURMA VE BAKIM İÇİN BİLGİLER (TR)
NÁVOD NA INŠTALÁCIU A ÚDRŽBU (SK)
РУКОВОДСТВО ПО МОНТАЖУ ИТЕХНИЧЕСКОМУ ОБСЛУЖИВАНИЮ (RU)
INSTRUCŢIUNI PENTRU INSTALARE ŞI ÎNTREŢINERE (RO)
INSTRUKCJA MONTAŻU I KONSERWACJI (PL)
ª¦Bl{A¥ J¦yZK{{ LAXBcZG
INSTALLÁCIÓS ÉS KARBANTARTÁSI KÉZIKÖNYV (HU)
ИНСТРУКЦИЯ ЗА МОНТИРАНЕ ИПОДДРЪЖКА (BG)
KVC
X
KVC
NKV

KVC – 50/60Hz KVCX – 50/60Hz NKV 10-15-20 – 50/60Hz
KVC 15/30 – KVC 15/306 KVCX 15/30 – KVCX 15/306 NKV 10/2 – NKV 10/26
KVC 25/30 – KVC 25/306 KVCX 25/30 – KVCX 25/306 NKV 10/3 – NKV 10/36
KVC 35/30 – KVC 35/306 KVCX 35/30 – KVCX 35/306 NKV 10/4 – NKV 10/46
KVC 45/30 – KVC 45/306 KVCX 45/30 – KVCX 45/306 NKV 10/5 – NKV 10/56
KVC 50/30 – KVC 50/306 KVCX 50/30 – KVCX 50/306 NKV 10/6 – NKV 10/66
KVC 60/30 – KVC 60/306 KVCX 60/30 – KVCX 60/306 NKV 10/7 – NKV 10/76
KVC 65/30 – KVC 65/306 KVCX 65/30 – KVCX 65/306 NKV 10/8 – NKV 10/86
NKV 10/9 – NKV 10/96
KVC 20/50 – KVC 20/506 KVCX 20/50 – KVCX 20/506 NKV 10/10 – NKV 10/106
KVC 30/50 – KVC 30/506 KVCX 30/50 – KVCX 30/506 NKV 10/12 – NKV 10/126
KVC 40/50 – KVC 40/506 KVCX 40/50 – KVCX 40/506 NKV 10/14 – NKV 10/146
KVC 55/50 – KVC 55/506 KVCX 55/50 – KVCX 55/506 NKV 10/16
KVC 65/50 – KVC 65/506 KVCX 65/50 – KVCX 65/506 – NKV 10/176
KVC 75/50 – KVC 75/506 KVCX 75/50 – KVCX 75/506 NKV 10/18
NKV 10/20
KVC 15/80 – KVC 15/806 KVCX 15/80 – KVCX 15/806 NKV 10/22
KVC 20/80 – KVC 20/806 KVCX 20/80 – KVCX 20/806
KVC 30/80 – KVC 30/806 KVCX 30/80 – KVCX 30/806 NKV 15/2 – NKV 15/26
KVC 40/80 – KVC 40/806 KVCX 40/80 – KVCX 40/806 NKV 15/3 – NKV 15/36
KVC 45/80 – KVC 45/806 KVCX 45/80 – KVCX 45/806 NKV 15/4 – NKV 15/46
KVC 55/80 – KVC 55/806 KVCX 55/80 – KVCX 55/806 NKV 15/5 – NKV 15/56
KVC 65/80 – KVC 65/806 KVCX 65/80 – KVCX 65/806 NKV 15/6 – NKV 15/66
NKV 15/7 – NKV 15/76
KVC 25/120 – KVC 25/1206 KVCX 25/120 – KVCX 25/1206 NKV 15/8 – NKV 15/86
KVC 35/120 – KVC 35/1206 KVCX 35/120 – KVCX 35/1206 NKV 15/9 – NKV 15/96
KVC 45/120 – KVC 45/1206 KVCX 45/120 – KVCX 45/1206 NKV 15/10 – NKV 15/106
KVC 60/120 – KVC 60/1206 KVCX 60/120 – KVCX 60/1206 NKV 15/12 – NKV 15/126
KVC 70/120 – KVC 70/1206 KVCX 70/120 – KVCX 70/1206 NKV 15/14
KVC 85/120 – KVC 85/1206 KVCX 85/120 – KVCX 85/1206 NKV 15/16
NKV 15/17
NKV 20/2 – NKV 20/26
NKV 20/3 – NKV 20/36
NKV 20/4 – NKV 20/46
NKV 20/5 – NKV 20/56
NKV 20/6 – NKV 20/66
NKV 20/7 – NKV 20/76
NKV 20/8 – NKV 20/86
NKV 20/9
NKV 20/10 – NKV 20/106
NKV 20/12
NKV 20/14
NKV 20/16
NKV 20/17

NKV 32-45 – 50/60Hz NKV 65-95 – 50/60Hz
NKV 32/2-2 – NKV 32/26-2 NKV 65/2-2 – NKV 65/26-2
NKV 32/2 – NKV 32/26 – NKV 65/26-1
NKV 32/3-2 – NKV 32/36-2 NKV 65/2 – NKV 65/26
NKV 32/3 – NKV 32/36 NKV 65/3-2 – NKV 65/36-2
NKV 32/4-2 – NKV 32/46-2 NKV 65/3 – NKV 65/36
NKV 32/4 – NKV 32/46 NKV 65/4-2 – NKV 65/46-2
NKV 32/5-2 – NKV 32/56-2 NKV 65/4 – NKV 65/46
NKV 32/5 – NKV 32/56 NKV 65/5-2 – NKV 65/56-2
NKV 32/6-2 – NKV 32/66-2 NKV 65/5
NKV 32/6 – NKV 32/66 – NKV 65/56-1
NKV 32/7-2 – NKV 32/76-2 NKV 65/6-2
NKV 32/7 – NKV 32/76 NKV 65/6
NKV 32/8-2 – NKV 32/86-2 NKV 65/7-2
NKV 32/8 – NKV 32/86 NKV 65/7
NKV 32/9-2 NKV 65/8-2
NKV 32/9 NKV 65/8
NKV 32/10-2
NKV 32/10 NKV 95/2-2 – NKV 95/26-2
NKV 32/11-2 – NKV 95/26-1
NKV 32/11 NKV 95/2 – NKV 95/26
NKV 32/12-2 NKV 95/3-2 – NKV 95/36-2
NKV 32/12 – NKV 95/36-1
NKV 32/13-2 NKV 95/3 – NKV 95/36
NKV 32/13 NKV 95/4-2 – NKV 95/46-2
NKV 95/4
NKV 45/2-2 – NKV 45/26-2 NKV 95/5-2
NKV 45/2 – NKV 45/26 NKV 95/5
NKV 45/3-2 – NKV 45/36-2 NKV 95/6-2
NKV 45/3 – NKV 45/36 NKV 95/6
NKV 45/4-2 – NKV 45/46-2
NKV 45/4 – NKV 45/46
NKV 45/5-2 – NKV 45/56-2
NKV 45/5 – NKV 45/56
NKV 45/6-2 – NKV 45/66-2
NKV 45/6 – NKV 45/66
NKV 45/7-2 – NKV 45/76-2
NKV 45/7 – NKV 45/76
NKV 45/8-2
NKV 45/8
NKV 45/9-2
NKV 45/9
NKV 45/10-2
NKV 45/10
NKV 45/11-2
NKV 45/11
NKV 45/12-2
NKV 45/12
NKV 45/13-2

KVCE NKVE 10-15-20 NKVE 32-45-65-95
KVCE 35/30 NKVE 10/2 NKVE 32/2
KVCE 45/30 NKVE 10/3 NKVE 32/3-2
KVCE 50/30 NKVE 10/4 NKVE 32/3
KVCE 60/30 NKVE 10/5 NKVE 32/4
KVCE 65/30 NKVE 10/6 NKVE 32/5-2
NKVE 10/7 NKVE 32/5
KVCE 30/50 NKVE 10/8 NKVE 32/6
KVCE 40/50 NKVE 10/9 NKVE 32/7-2
KVCE 55/50 NKVE 10/10
KVCE 65/50 NKVE 10/12 NKVE 45/2-2
KVCE 75/50 NKVE 10/14 NKVE 45/2
NKVE 10/16 NKVE 45/3
KVCE 30/80 NKVE 10/18 NKVE 45/4
KVCE 40/80 NKVE 10/20
KVCE 45/80 NKVE 10/22 NKVE 65/2-2
KVCE 55/80 NKVE 65/2
KVCE 65/80 NKVE 15/2 NKVE 65/3-2
NKVE 15/3
KVCE 35/120 NKVE 15/4 NKVE 95/2-2
KVCE 45/120 NKVE 15/5 NKVE 95/2
KVCE 60/120 NKVE 15/6
KVCE 70/120 NKVE 15/7
KVCE 85/120 NKVE 15/8
NKVE 15/9
NKVE 15/10
NKVE 15/12
NKVE 15/14
NKVE 15/16
NKVE 15/17
NKVE 20/2
NKVE 20/3
NKVE 20/4
NKVE 20/5
NKVE 20/6
NKVE 20/7
NKVE 20/8
NKVE 20/9
NKVE 20/10
NKVE 20/12
NKVE 20/14

ITALIANO pag. 1
FRANÇAIS page 9
ENGLISH page. 17
DEUTSCH seite 25
NEDERLANDS pag. 33
ESPAÑOL pág. 41
SVENSKA sid. 49
ΕΛΛΗΝΙΚΑ σελ. 57
TÜRKÇE sayfa 65
SLOVENSKY str. 73
РУССКИЙ стр.81
ROMÂNĂ pag. 89
POLSKI str. 97
105 ªRte §IZk
MAGYAR
Oldal 113
БЪЛГАРСКИ Стр. 121

ENGLISH
17
1. General
2. Applications
3. Pumped fluids
4. Technical data KVC-KVCX
4.1 Electrical data
4.2 Operating conditions
5. Technical data NKV
5.1 Electrical data
5.2 Operating conditions
6. Management
6.1 Storage
6.2 Handling KVC-KVCX / NKV 10-15-20
6.3 Handling NKV 32-45-65-95
7. Warnings
7.1 Safety
7.2 Checking motor shaft rotation
7.3 New systems
8. Protections
8.1 Moving parts
8.2 Noise level
8.3 Hot and cold parts
9. Installation
9.1 Pump installation
9.2 Minimum inlet pressure (Z1)
9.3 Minimum suction pressure
9.4 Minimum nominal capacity
9.5 Electrical connections
9.6 Starting
9.7 Stopping
9.8 Precautions
10. Maintenance
10.1Modifications and spare parts
11. Troubleshooting
NKV Mechanical Seal Maintenance
Table A Airborne noise pumps
Table B Star-delta switch-over times
Table C Three-phase motor connection
Chart 1 Barometric Pressure (pb)
Chart 2 Vapour Tension (pV)
Page
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129
130
130
131
132
133
The appliance is not intendend for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a
person responsable for their safety. Children should
be supervised to ensure that they do not play with the
appliance.
2. APPLICATIONS
Multistage centrifugal pumps indicated for booster
sets for water systems of small, medium and large
utilieties. They may be used in various fields of
applications such as:
for fire-fighting and washing systems,
for supplying drinking water and feeding
autoclaves,
for feeding boilers and circulating hot water,
for conditioning and chilling systems,
for circulating and industrial processing plants.
3. PUMPED FLUIDS
The machine has been designed and built for
pumping water, free from explosive substances and
solid particles or fibres, with a density of 1000 kg/m³
and a kinematic viscosity of 1 mm²/s, and chemically
non-aggressive liquids.
Small quantities of sand, up to 50 ppm, are
accepted.
4. TECHNICAL DATA KVC – KVCX
4.1 Electrical data
- Supply voltage: 1x 220-240V – 50Hz
3x 230-400V – 50Hz
1x 115V – 60Hz
1x 220-230V – 60Hz
3x 220-230/380-400V – 60Hz
- Absorbed power: see electric data plate
- Degree of protection: IP55
- Insulation class: F
4.2 Operating conditions
1. GENERAL
Read this documentation
carefully before
installation.
Installation, electrical connection and commissioning
must be carried out by skilled personnel in
compliance with the general and local safety
regulations in force in the country of installation of
the product. Failure to comply with these instructions
not only causes risk to personal safety and damage
to the equipment, but invalidates every right to
assistance under guarantee.
- Delivery:
- Head up:
50 ÷ 200 l/min.
pag. 134
- Liquid temperature: 0 ÷ 35°C domestic use
(EN 60335-2-41)
- Liquid temperature: 0 ÷ 40°C for other uses
- Environment temperature: 0 ÷ 40°C
- Storage temperature: -10 ÷ 40°C
- Maximum working pressure: 12 bar (1200 kPa)
- Relative humidity in air: Max. 95%
- Motor construction: Cei 2-3 / Cei 61-69
(EN 60335-2-41)
- Weight: see plate on package
- Limit of operation with
closed mouth:
60 min. max.

ENGLISH
18
5. TECHNICAL DATA NKV
5.1 Electrical data
- Supply voltage: 3x 230-400V – 50Hz
3x 400V ∆– 50Hz
3x 380-480V ∆– 60Hz
3x 220-277V ∆/ 380-480V – 60Hz
- Absorbed power: see electric data plate
- Degree of protection: IP55
- Insulation class: F
5.2 Operating conditions
- Delivery:
- Head up:
160 ÷ 1166 l/min.
pag. 134
- Liquid temperature: -15°C ÷ 120°C
- Max. environment temperature: 40°C
- Storage temperature: -20°C ÷ 60°C
- Maximum working pressure:
- Maximum working pressure
NKV 32-45:
25 bar (2500 kPa)
32 bar (3200 kPa)
- Relative humidity in air: Max. 95%
- Motor construction: Cei 2-3 / Cei 61-69
( EN 60335-2-41 )
- Weight: see plate on package
6. MANAGEMENT
Observe the current accident prevention
standards. Risk of crushing. The pump may
be heavy. Use suitable lifting methods and
always wear personal protection
equipment.
Before handling the product, check its weight to
identify suitable lifting equipment.
6.1 Storage
All the pumps must be stored indoors, in a dry,
vibration-free and dust-free environment, possibly with
constant air humidity.They are supplied in their
original packaging and must remain there until the
time of installation. If this is not possible, the intake
and delivery aperture must be accurately closed.
6.2 Handling KVC-KVCX / NKV 10-15-20
Avoid subjecting the products to needless jolts or
collisions. To lift and transport the unit, use lifting
equipment and the pallet supplied standard
(If applicable). Use suitable hemp or synthetic ropes
only if the part can be easily slung, connecting them if
possible to the eyebolts provided.
In the case of coupled pumps, the eyebolts provided
for lifting one part must not be used to lift the pump-
motor assembly.
6.3 Handling NKV 32-45-65-95
The pump motors supplied with eyebolt
should not be used to handle the whole
assembled electric pump (fig.1C).
For handling pumps with motor of up to 4kW, use the
belts wound around the motor as shown in fig. 1A.
For pumps with motor power greater or equal to
5.5kW, use the belts attached to the two flanges
located in the coupling area between the pump and the
motor as shown in fig.1B.
There is a risk that the pump may overturn
during handling; make sure that the pump
remains in a stable position during
handling.
7. WARNINGS
7.1 Safety
Use is allowed only if the electric system is in
possession of safety precautions in accordance with the
regulations in force in the country where the product is
installed ( for Italy, CEI 64/2 ).
7.2 Checking motor shaft rotation
Before installing the pump you must check that the
rotating parts turn freely. For this purpose, remove the
fan cover from its seat in the motor end cover. Insert a
screwdriver in the notch on the motor shaft from the
ventilation side.
Fig. 2
Do not force the fan with pliers or other
tools to try to free the pump as this could
cause deformation or breakage of the
pump.
A
≤4kW
B
≥5kW
C
Fig. 1
NKV 10-15-20
KVC
KVCX
NKV 32-45
NKV 65-95

ENGLISH
19
7.3 New systems
Before running new systems the valves, pipes, tanks
and couplings must be cleaned accurately.
To avoid welding waste or other impurities getting into
the pump, the use of TRUNCATED CONICAL filters
made of corrosion resistant materials (DIN 4181) is
recommended.
Fig. 3
5 1 2 4
3
1-Filter body
2-Narrow mesh filter
3-Differential pressure
gauge
4-Perforated sheet
5-Pump intake aperture
8. PROTECTIONS
8.1 Moving parts
Before starting the pump all the moving parts have to
be properly protected with dedicated components
( fan, cover, etc. ).
During pump operation, keep well
away from the moving parts ( shaft,
fan, etc. ).
If getting closed to the running pump is necessary, be
properly dressed as from laws rules, in order to avoid
injuries.
8.2 Noise level
See table A, pag. 130.
In cases where the LpA noise levels exceed 85 dB(A),
suitable HEARING PROTECTION must be used in
the place of installation, as required by the regulations
in force.
8.3 Hot and cold parts
DANGER OF BURNING !!
As well as being at high temperature
and high pressure, the fluid in the
system may also be in the form of
steam!
It may be dangerous even to touch the pump or
parts of the system.
If the hot or cold parts are a source of danger, they
must be accurately protected to avoid contact with
them.
9. INSTALLATION
The pumps may contain small
quantities of residual water from
testing. We advise flushing them
briefly with clean water before their
final installation.
9.1 Pump installation
The electropump must be fitted in a well ventilated
place and with an environment temperature not
exceeding 40°C.
Electropumps with degree of protection IP55 may
be installed in dusty and damp environments,
without any specific protection.
It is always good practice to place the pump as
close as possible to the liquid to be pumped.
The installation baseplate, provided by the
customer, if they are metallic they have to be
painted rust and corrosion. They have to be flat and
stiff enough to resist to short circuit forces and avoid
resonnance due to vibrations.
Concrete basements have to be well solid and dry
before installing the pumps.
A firm anchoring of the feet of the pump assembly
on the base helps absorb any vibrations created by
pump operation.
The pump may be installed in either horizontal or
vertical position, as long as the motor is always
above the pump.
Ensure that the metal pipes do not transmit excess
force to the pump apertures, so as to avoid causing
deformations or breakages.
Use pipes with a suitable thread to avoid damage to
the inserts.
The internal diameter of the pipes must never be
smaller than that of the apertures of the pump
If the head at intake is negative, it is indispensable
to fit a foot valve with suitable characteristics at
intake.
For suction depths of over four metres or with long
horizontal stretches it is advisable to use an intake
pipe with a diameter larger than that of the intake
aperture of the pump.
Any passage from a pipe with a small diameter to
one with a larger diameter must be gradual. The
length of the passage cone must be 5 to 7 times the
difference in diameter.
Check accurately to ensure that the joins in the
intake pipe do not allow air infiltrations.
To prevent the formation of air pockets, the intake
pipe must slope slightly upwards towards the pump.

ENGLISH
20
Fig. 4
Interception valves must be fitted upstream and
downstream from the pump so as to avoid having
to drain the system when carrying out pump
maintenance. Do not run the pump with closed
valve on the plant.
If there is any possibility of the pump operating with
the interception valves closed, provide a by-pass
circuit or a drain leading to a liquid recovery tank.
To reduce noise to a minimum it is advisable to fit
vibration-damping couplings on the intake and
delivery pipes and between the motor feet and the
foundation.
If more than one pump is installed, each pump
must have its own intake pipe. The only exception
is the reserve pump (if envisaged).
9.2 Minimum inlet pressure ( Z1 )
(negative suction head pump)
To have good performances of the pump avoiding
cavitation phenomenon it is necessary to calculate the
suction lift Z1.
To determine the suction level Z1, the following formula
must be applied:
Z1= pb – rqd. N.P.S.H – Hr – correct pV– Hs
where:
Z1 = difference in level in metres between the
intake mouth of the pump and the free
surface of the liquid to be pumped.
pb = barometric pressure in mcw of the place of
installation.( chart 1, pag. 132 )
NPSH = net load at intake of the place of work.
Hr = load loss in metres on the whole intake
duct.
pV = vapour tension in metres of the liquid in
relation to the temperature expressed in
°C. ( chart 2, pag. 133 )
Hs = safety margin = minimum 0.5 metres head.
If the calculated “Z1” is positive, the pump can operate
at a suction lift of maximum “Z1” metres head.
If the calculated “Z1” is negative, than the pump has to
be fitted with a positive lift of at least “Z1” mt.
Ex. : installation at sea level
and fluid at 20°C
required N.P.S.H: 3,25 m
pb : 10,33 mcw ( chart 1, pag. 132 )
Hr : 2,04 m.
t : 20°C
pV : 0,22 m. ( chart 2, pag. 133 )
Z1 : 10,33 – 3,25 – 2,04 – 0,22 – 0,5 = 4,32 approx.
This means that the pump can operate at a suction lift of
maximum 4,32 metres head.
9.3 Minimum suction pressure
(positive suction head pump)
It is important to maintain the sum of the inflow pressure
and that developed by the pump, the latter with feeder
closed, always lower than the maximum pressure rating
(PN) permitted by the pump.
P1max + P2max ≤PN (fig.6A)
P1max + P2max + P3max ≤PNHP (fig.6B)
9.4 Minimum nominal capacity
The function of the pump at a lower level than the
minimum permitted nominal capacity may cause
excessive and detrimental overheating of the pump.
For liquid temperatures higher than 40°C, the minimum
capacity should be increased in relation to the
temperature of the liquid (see fig. 6A)
The pump must never operate with the
delivery valve closed.
Fig. 5
pV
NPSH
pb
Hr
Z1
positive slope towards
the pump for the
suction pipe
non-return valve
secure the pump to the
basement by a solid and strong
installation

ENGLISH
21
9.5 Electrical connections
ATTENTION!!
ALWAYS OBSERVE THE SAFETY
REGULATIONS!!
Electrical installation must be carried out by an
authorised, skilled electrician who assumes all
responsability.
THE SYSTEM MUST BE
CORRECTLY AND SAFELY
EARTHED!!
Scrupulously follow the wiring diagrams inside
the terminal board box and those on table C, pag.
131.
Ensure that the mains voltage is the same as that
shown on the motor data plate.
The pumps must always be connected to an
external switch.
Three-phase motors must be protected with an
automatic switch (e.g. circuit breaker) calibrated at
the values shown on the data plate of the
electropump.
In the case of three-phase motors with star-delta
start, ensure that the switch-over time from star to
delta is as short as possible.(see table B,pag.130 ).
In NKV elecropumps the terminal
board may face in four different
positions: slacken and remove the four
retaining screws between the motor
flange and the support. Turn the motor
into the desired position and replace the
screws.
9.6 Starting
Before starting the pump and the
suction pipe have to be properly
primed pump and pipe have to be fully
filled with clean water.
Starting NKV
In accordance with accident-prevention
regulations, the pump must be run only if
the coupling (where provided) is suitably
protected. So the pump must be started
only after having checked that the coupling
protections are correctly fitted.
To obtain priming, proceed as follows:
KVC – KVCX (Fig.7) :
After having removed the cap, fill the pump slowly
through the filling hole so as to discharge any air
pockets present inside.
NKV (Fig.8) :
Before filling the pump through the filling hole you
must first partially unscrew the drainage pin/cap
(when filling just unscrew it by 3 or 4 turns) without
forcing it.
After having removed the cap, fill the pump slowly
through the filling hole so as to discharge any air
pockets present inside.
Before starting the pump, close the filling cap and
screw the drainage pin/cap all the way, without
forcing it.
Vent by means of the screw on the part opposite the
filling cap, as indicated in Fig. 8.
Fully open the gate valve on intake and keep the
one on delivery almost closed.
Switch on and check that the direction of rotation is
correct, as indicated in Fig. 2. If not, invert any two
phase leads, after having disconnected the pump
from the power mains.
Once the hydraulic circuit has been completely filled
with liquid, gradually open the delivery gate valve
until its maximum opening.
With the pump running, check the supply voltage at
the motor terminals, which must not differ from the
rated value by +/- 5%.
With the unit at regular running speed, check that
the current absorbed by the motor does not exceed
the value on the data plate.
P1max + P2max ≤PN
P1max + P2max + P3max ≤PN
P1max
P2max P3max
P1max
P2max
A
B Std. Pum
p
HP Pum
p
Std. Pump
Fig. 6

ENGLISH
22
Fig. 7 KVC - KVCX
Fig. 8 NKV
9.7 Stopping
Close the interception device on the delivery pipe. If there is a check device on the delivery pipe, the interception
valve on the delivery side may ramain open as long as there is back.
For a long period of inactivity, close the interception device on the intake pipe and, if supplied, all the auxiliary
control connections.
9.8 Precautions
The electropump should not be started an excessive number of times in one hour. The maximum admissible
value is as follows:
Type of pump Maximum number of
starts per hours
KVC - KVCX 30
NKV 10 10 ÷15
NKV 15 - NKV 20
NKV 32 - NKV 45
NKV 65 - NKV 95
5 ÷ 10
When the pump remains inactive for a long time at temperatures of less than 0°C, the pump body must be
completely emptied through the drain cap.
Check that the leakage of liquid does not damage persons or things, especially in plants that
use hot water.
filling cap
drainage cap
drainage cap
Before filling the pump
you must partially
unscrew the drainage
pin/cap!!
drainage cap
filling cap
vent screw

ENGLISH
23
It is recommended to empty the pump when it is
not running for a long time at normal temperature.
The drain plug shall be opened until the pump will
be utilized again.
When restarting after long periods of inactivity it is
necessary to repeat the operations described
above in the paragraphs WARNINGS and
STARTING UP.
10. MAINTENANCE
In normal operating conditions the electropump
does not require any kind of maintenance.
It is recommended to check time by time current
absorption, pressure head at closed valve and
maximum flow.
The electropump can only be dismantled by
specialised, skilled personnel in possession of
the qualifications required by the specific
regulations.
In any case all repair and maintenance jobs must be
carried out only after having disconnected the
pump from the power mains.
If the liquid has to be drained out
maintenance, ensure that the liquid
coming out cannot harm persons or
things, especially in using hot water.
The legal requirements on the disposal
of any harmful fluids must also be
complied with.
10.1 Modifications and spare parts
Any modification not authorised beforehand relieves the
manufacturer of all responsibility. All the spare parts
must be authentic and all the accessories must be
authorised by the manufacturer.
Carry out maintenance based on the
type of bearing indicated on the
technical data plate.
11. TROUBLESHOOTING
Fault Check (possible cause) Remedy
The motor does not start and makes
no noise.
Check the protection fuses. If they are burnt-out, change them.
Check the electric connections. Correct any errors.
Check that the motor is live.
Motor protector cut-off the motor,
for the single-phased motors, due
to over heating of tag windings.
Wait for automatic reset of the motor
protector once the temperature has
fallen below the maximum limit.
The motor does not start but makes
noise.
Check that supply voltage
correspond with voltage on the
pump label.
Check the electrical connections. Correct any errors.
Check that all the phases are
present.
Restore the missing phase.
Check for obstructions in the
pump or motor.
Remove any obstructions.
The motor turns with difficulty. Verify that supply voltage is at an
acceptable valve.
Check whether any moving parts
are scraping against fixed parts.
Eliminate the cause of the scraping.
Check the state of the bearings. Change any worn bearings.
The (external) motor protection trips
immediately after starting.
Check that all the phases are
present.
Restore the missing phase.
Look for possible open or dirty
contacts in the protection.
Change or clean the component
concerned.
Look for possible faulty insulation
of the motor, checking the phase
resistance and insulation to earth.
Change the motor casing with the
stator or reset any cables
discharging to earth.
The motor protection trips too
frequently.
Ensure that the environment
temperature is not too high.
Provide suitable ventilation in the
environment where the pump is
installed.
Check the calibration of the
protection.
Calibrate at a current value suitable
for the motor absorption at full load.
Check the state of the bearings. Change any worn bearings.
Check the motor rotation speed.

ENGLISH
24
Fault Check (possible cause) Remedy
The pump does not deliver. Check priming.
On three-phase motors, check
that the direction of rotation is
correct.
Invert the connection of two supply
wires.
Difference in suction level too
high.
The diameter of the intake pipe is
insufficient or the horizontal
stretch is too long.
Replace the intake pipe with one
with a larger diameter.
Foot valve or intake pipe blocked. Clean the foot valve and the intake
pipe.
The pump does not prime. The intake pipe or the foot valve
is taking in air.
Check the suction pipe, repeat the
priming operations.
Check the slope of the suction
pipe.
Correct the inclination of the intake
pipe.
The pump supplies insufficient flow. Foot valve or impeller blocked. Remove clog. Replace the impeller
if weared down.
The diameter of the intake pipe is
insufficient.
Replace the pipe with one with a
larger diameter.
Check that the direction of
rotation is correct.
Invert the connection of two supply
wires.
The pump flow rate is not constant. Intake pressure too low.
Intake pipe or pump partly
blocked by impurities.
Remove clog.
The pump turns in the opposite
direction when switching off.
Leakage in the intake pipe.
Foot valve or check valve faulty
or blocked in partly open position.
Repair or replace the faulty valve.
The pump vibrates and operates
noisily.
Check that the pump and/or the
pipes are firmly anchored.
There is cavitation in the pump. Reduce the intake height or check
for load losses.
The pump is running above its
plate characteristics.
Reduce the flow rate.
The pump is not turning freely. Check the state of wear of the
bearings.

129
NKV 10-15-20 Mechanical Seal Maintenance
NKV 32-45-65-95 Mechanical Seal Maintenance
x3
= 4kW
≥5,5kW

130
Rumore aereo prodotto dalle pompe dotate con motore di serie
Bruit aérien produit par les pompes équipées d’un moteur de série
Airborne noise produced by the pumps with standard motor
Geräuschemission der Pumpe mit serienmäßigem Motor
Luchtgeluid geproduceerd door pompen met standaard motoren
Ruido aéreo producido por las bombas provistas de motor de serie
Luftburet buller från pumpar med standardmotor
Εναέριος θόρυβος από τις αντλίες με στάνταρτ κινητήρα
Standart üretim motorlar ile donatılmışpompaların çıkardığıgürültü
Hluk vyprodukovaný čerpadlami vybavenými sériovým motorom
Воздушный шум, производимый насосами ссерийным двигателем
Zgomot aerian produs de pompele dotate cu motor de serie
Hałas wytwarzany przez pompęwyposażonąw silnik seryjny
¨XB¦KkA zZR}I ©X¥`}{A LBUg}{A ák PKB §®A¥¡ P¦Og
Széria jellegűmotorral szerelt szivattyúk zajszintje
Ниво на шум на помпи със стандартен мотор
TAB. A
KVC - KVCX
Motor Lpa
[dB(A)] Lwa [dB(A)]
MEC 71 72,2 75,2
MEC 80 74,3 77,3
NKV
Motor Power
kW Lpa [dB(A)]
MEC 80S 0,75 62
MEC 80M 1,1 62
MEC 90S 1,5 67
MEC 90L 2,2 67
MEC 100L 3 66
MEC 112M 4 69
MEC 132S 5,5 71
MEC 132S 7,5 71
MEC 160M 11 73
MEC 160M 15 73
MEC 160L 18,5 73
MEC 180M 22 75
MEC 200 L 30 76
MEC 200 L 37 76
MEC 225 M 45 76
Tempi commutazione stella-triangolo / Temps de commutation étoile/triangle
Star-delta switch-over times / Umschaltzeiten Stern-Dreieck
Ster-driehoek schakeltijden / Tiempos de conmutación estrella-triángulo
Omkopplingstider stjärna/triangel / Χρόνοι μεταγωγής αστέρα-τριγώνου
Yıldız-üçgen komütasyon süreleri / Časy komutácie hviezda-trojuholník
Время переключения со звезды на треугольник / Timpi de comutare stea-triunghi
Czas komutacji gwiazda-trójkąt / N{M} - ª}O |¦¥RK{A áB}`C / Csillag-delta átkapcsolási idő
Време за превключване звезда-триъгълник
TAB. B
Motor
( kW ) ( Hp )
30 40 3”
30 40 5”
Y

131
Collegamento TRIFASE per motori
Connexion TRIPHASÉE pour moteurs
THREE-PHASE motor connection
DREIPHASEN-Anschluss für Motoren
DRIEFASE aansluiting voor motoren
Conexión trifásica para motores
TREFASANSLUTNING för motorer
ΤΡΙΦΑΣΙΚΗ σύνδεση κινητήρων
Motorlar için TRİFAZ bağlantı
TROJFÁZOVÉ zapojenie motorov
ТРЕХФАЗНОЕ соединение двигателей
Racordare TRIFAZATĂpentru motoare
Połączenie TRÓJFAZOWE dla silników
LByZR}{{ Z¥i{A §M½M iIZ
Motorok háromfázisú bekötése
Свързване на 3-фазен мотор
TAB. C
3 ~ 230/400 V
3 ~ 400 V
W2
U1
U2
V1
V2
W1
W2U2 V2
U
1
V
1
W
1
230V 400V
U1
V1
W1
U1
V1
W1


Y
W2
U1
U2
V1
V2
W1
U1
V1
W1



132
7
8
9
10
0 500 1000 1500 2000 2500 3000
( m )
( mCA )
Grafico 1 : Pressione Barometrica (pb)
Graphique 1 : Pression Barométrique (pb)
Chart 1 : Barometric Pressure (pb)
Grafik 1 : Barometrischer Druck (pb)
Grafiek 1 : Barometerdruk (pb)
Gráfico 1 : Presión Barométrica (pb)
Diagram 1: Barometertryck (pb)
∆ιάγραμμα 1 : Βαρομετρική πίεση (pb)
Grafik 1 : Barometrik basınç (pb)
Graf 1 : Barometrický tlak (pb)
График 1 : Барометрическое давление (pb)
Graficul 1 : Presiune Barometrică(pb)
Rysunek 1 : Ciśnienie barometryczne (pb)
(Pb) ¨ZK}¥ZBI ipg :1 áB¦I ~aZ
1.grafikon : Barometrikus nyomás (pb)
диаграма 1 : Барометрично налягане (pb)

133
°C m
10 0,121
20 0,22
30 0,387
40 0,675
50 1,147
60 1,888
70 3,014
80 4,67
90 7,035
100 10,33
110 14,83
120 20,85
130 28,744
140 38,97
150 52
Pb _ (Pb-Pv)
Y4° Yt
Pb e Pv in mCA
0
50
100
150
0 4 8 12 16 20 24 28 32 36 40 44 48 52
( m )
( °C )
Grafico 2 : Tensione di vapore (pV)
Graphique 2 : Pression de vapeur (pV)
Chart 2 : Vapour Tension (pV)
Grafik 2 : Dampfspannung (pV)
Grafiek 2 : Dampspanning (pV)
Gráfico 2 : Tensión de vapor (pV)
Diagram 2: Ångspänning (pV)
∆ιάγραμμα 2 : Τάση ατμών (pV)
Grafik 2 : Buhar gerilimi (pV)
Graf 2 : Tenzia pary (pV)
График 2 : Напряжение пара (pV)
Graficul 2 : Tensiune de abur (pV)
Rysunek 2 : Prężność pary (pV)
(Pv) ZBUI{A X¢O :2 áB¦I ~aZ
2.grafikon : Gőzfeszültség (pV)
диаграма 2 : Усилие от парите (pV)

134
Modello / Modèle / Model
Modell / Model
Modelo / Modell / Model
Модель / Model /QY¥} /
Modell / Модел
Prevalenza / Hauteur d'élévation / Head up
Förderhöhe / Overwicht / Prevalencia
Maximal pumphöjd / Manometrik yükseklik
Напор / Prężność pary (pV) / x¥tK{A/ Emelési magasság / Напор
Hmax (m.) 2 poles
50 Hz Hmax (m.) 2 poles 60 Hz
KVC 15/30 – 15/306 22.4 23
KVC 25/30 – 25/306 33.9 35
KVC 35/30 – 35/306 45.6 46
KVC 45/30 – 45/306 56.6 58
KVC 50/30 – 50/306 69.8 71
KVC 60/30 – 60/306 82 85
KVC 65/30 – 65/306 95 - -
KVC 20/50 – 20/506 27.4 25
KVC 30/50 – 30/506 41.1 37
KVC 40/50 – 40/506 54.9 50
KVC 55/50 – 55/506 68.6 65
KVC 65/50 – 65/506 82.3 78
KVC 75/50 – 75/506 96 91
KVC 15/80 – 15/806 22.8 23
KVC 20/80 – 20/806 34.6 34
KVC 30/80 – 30/806 46.6 47
KVC 40/80 – 40/806 58.8 59
KVC 45/80 – 45/806 71.3 70
KVC 55/80 – 55/806 84 82
KVC 65/80 – 65/806 97 94
KVC 25/120 – 25/1206 30.4 29
KVC 35/120 – 35/1206 46.2 45
KVC 45/120 – 45/1206 62.4 61
KVC 60/120 – 60/1206 78 76
KVC 70/120 – 70/1206 95 92
KVC 85/120 – 85/1206 112.7 - -
KVCX 15/30 – 15/306 22.4 23
KVCX 25/30 – 25/306 33.9 35
KVCX 35/30 – 35/306 45.6 46
KVCX 45/30 – 45/306 56.6 58
KVCX 50/30 – 50/306 69.8 71
KVCX 60/30 – 60/306 82 85
KVCX 65/30 – 65/306 95 - -
KVCX 20/50 – 20/506 27.4 25
KVCX 30/50 – 30/506 41.1 37
KVCX 40/50 – 40/506 54.9 50
KVCX 55/50 – 55/506 68.6 65
KVCX 65/50 – 65/506 82.3 78
KVCX 75/50 – 75/506 96 91
KVCX 15/80 – 15/806 22.8 23
KVCX 20/80 – 20/806 34.6 34
KVCX 30/80 – 30/806 46.6 47
KVCX 40/80 – 40/806 58.8 59

135
Modello / Modèle / Model
Modell / Model
Modelo / Modell / Model
Модель / Model /QY¥} /
Modell / Модел
Prevalenza / Hauteur d'élévation / Head up
Förderhöhe / Overwicht / Prevalencia
Maximal pumphöjd / Manometrik yükseklik
Напор / Prężność pary (pV) / x¥tK{A / Emelési magasság / Напор
Hmax (m.) 2 poles
50 Hz Hmax (m.) 2 poles 60 Hz
KVCX 45/80 – 45/806 71.3 70
KVCX 55/80 – 55/806 84 82
KVCX 65/80 – 65/806 97 94
KVCX 25/120 – 25/1206 30.4 29
KVCX 35/120 – 35/1206 46.2 45
KVCX 45/120 – 45/1206 62.4 61
KVCX 60/120 – 60/1206 78 76
KVCX 70/120 – 70/1206 95 92
KVCX 85/120 – 85/1206 112.7 - -
NKV 10/2 20 29
NKV 10/3 31 44
NKV 10/4 41 59
NKV 10/5 51 73
NKV 10/6 61 87
NKV 10/7 72 106
NKV 10/8 82 119
NKV 10/9 92 132
NKV 10/10 102 148
NKV 10/12 123 176
NKV 10/14 143 209
NKV 10/16 164 242
NKV 10/17 - - 253
NKV 10/18 184 - -
NKV 10/20 205 - -
NKV 10/22 225 - -
NKV 15/2 26 38
NKV 15/3 40 56
NKV 15/4 53 75
NKV 15/5 66 97
NKV 15/6 79 113
NKV 15/7 92 133
NKV 15/8 106 154
NKV 15/9 119 172
NKV 15/10 132 195
NKV 15/12 158 231
NKV 15/14 185 - -
NKV 15/16 211 - -
NKV 15/17 225 - -
NKV 20/2 28.6 39
NKV 20/3 42.9 59
NKV 20/4 57.2 80
NKV 20/5 71.5 101