EBARA GS Instructions for use

1
Model GS
STANDARDISED END SUCTION PUMPS AND ELECTRIC PUMPS
Instruction and maintenance manual ....................................................... 3EN
POMPE ED ELETTROPOMPE CENTRIFUGHE NORMALIZZATE
Manuale di istruzioni e manutenzione.................................................... 31 IT
POMPES À ASPIRATION AXIALE NORMALISÉES
Manuel d’instructions et de maintenance .............................................. 59 FR
NORMPUMPEN NACH EN 733
Gebrauchs - und wartungsanleitung...................................................... 87 DE
BOMBA CENTRÍFUGA HORIZONTAL
Manual de instrucciones y mantenimento............................................ 115 ES
NORMALISERADE CENTRIFUGALPUMPAR OCH ELPUMPAR
Manual för instruktioner och underhåll................................................. 143 SV
PUMPER OG NORMALISEREDE CENTRIFUGE ELEKTROPUMPER
Drift og vedligehold manual.................................................................. 171 DA
NORMALISOIDUT PUMPUT JA SÄHKÖISET KESKIPAKOPUMPUT
Käyttö- ja huolto-ohje........................................................................... 199 FI
GESTANDAARDISEERDE POMPEN EN ELEKTRISCHE CENTRIFUGAALPOMPEN
Handleiding voor gebruik en onderhoud.............................................. 227 NL
BOMBAS E ELETROBOMBAS CENTRÍFUGAS NORMALIZADAS
Manual de instruções e manutenção ................................................... 255 PT
ΕΝΑΡΜΟΝΙΣΜΕΝΕΣ ΦΥΓΟΚΕΝΤΡΕΣ ΑΝΤΛΙΑΣ ΚΑΙ ΗΛΕΚΤΡΙΚΕΣ ΑΝΤΛΙΕΣ
Εγχειρίδιο οδηγιών και συντήρησης...................................................... 283 EL
NORMALIZOVANÁ ČERPADLA ODSTŘEDIVÁ ELEKTRICKÁ ČERPADLA
Návod k použití a údržbě ..................................................................... 311 CS
ŠTANDARDIZOVANÉ ČERPADLÁ A ODSTREDIVÉ ČERPADLÁ
Návod na použitie a údržbu ................................................................. 339 SK
POMPY I ELEKTROPOMPY WIRNIKOWE ZNORMALIZOWANE
Instrukcja Obsługi i Konserwacji .......................................................... 367 PL
СТАНДАРТИЗИРОВАННЫЕ ЦЕНТРОБЕЖНЫЕ НАСОСЫ И ЭЛЕКТРОНАСОСЫ
Руководство по эксплуатации и техническому обслуживанию ..... 395 RU
POMPE ȘI ELECTROPOMPE CENTRIFUGALE STANDARDIZATE
Manual de instrucțiuni și întreținere...................................................... 423 RO
STANDART HALE GETIRILMIŞ SANTRIFÜJ TIPI POMPALAR VE ELEKTRIKLI POMPALAR
Kullanım ve bakım kılavuzu .................................................................. 451 TR

506 ......................................................................  AR

534 ............................................................ FA

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Instruction and Maintenance Manual

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Instruction and Maintenance Manual
CONTENTS
1. INTRODUCTION.......................................................................................................4
2. SAFETY.....................................................................................................................4
2.1 PREPARATION AND TRAINING OF STAFF
2.2 MAINTENANCE
3. TRANSPORT AND STORAGE..................................................................................5
4. SPECIFICATIONS .....................................................................................................5
5. OPERATING LIMITS.................................................................................................6
6. INSTALLATION .........................................................................................................7
6.1 INSTALLATION POINT
6.2 LIFTING
6.3 CEMENTED BASE
6.4 PIPES
6.5 ALIGNMENT
6.6 ELECTRICAL SYSTEM
6.6.1 ELECTRICAL CONNECTION
6.6.2 ELECTRICAL MAINTENANCE
7. OPERATION............................................................................................................13
7.1 BEFORE STARTING THE PUMP
7.2 STARTING THE PUMP
7.3 STOPPING THE PUMP
7.4 ADJUSTING THE GASKET (ONLY PUMPS WITH SOFT SHAFT SEAL)
8. MAINTENANCE ......................................................................................................15
8.1 DAILY INSPECTION
8.2 PRECAUTIONS DURING OPERATION
8.3 PRECAUTIONS DURING STORAGE
8.4 REPLACING PARTS
8.5 TROUBLESHOOTING
8.6 RESIDUAL RISKS
9. CONSTRUCTION....................................................................................................24
10. DISMANTLING AND FITTING................................................................................25
10.1 DISMANTLING
10.2 FITTING
11. REPAIR AND WARRANTY.....................................................................................26

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Instruction and Maintenance Manual
1. INTRODUCTION
Thank you for choosing this EBARA GS model pump. This operating manual describes
the correct installation, operation and maintenance procedures of the product. EBARA
pays great attention to the manufacturing of its products so that their use by end-users
may be as safe as possible. However, using this pump improperly may reduce its oper-
ating performance and lead to personal injury and damage to property.
All our devices are delivered after being checked at our own plant and so they are in a
condition to operate correctly after being connected to the power supply and the water
system, as shown in this manual.
When this device is delivered:
Check the nameplates. It is very important to check the voltage rating for the pump.
Also, check the value of the head, the capacity and the RPM of the pumps, as well
as the maximum absorption of the motors.
Double check the equipment to make sure there is no damage generated during the
start up and that there are no loose screws or mountings.
Check that all the accessories, spare parts and required options are included within
the supply.
We recommend that you keep this manual in a safe place so that it may be consulted
whenever needed.
2. SAFETY
This instruction and maintenance manual includes the basic instructions that should be
taken into consideration during installation, operation and maintenance of the equip-
ment.
Generic hazard Electrical Voltage
It is essential that the worker/installer reads all the sections in this manual carefully be-
fore installation and operation. We recommend that you keep this manual in the place
where you plan to install the equipment. In addition to the safety instructions found in
this manual, it is also necessary to take into account the safety regulations and stand-
ards in force in the country where you want to use the equipment, in order to achieve
greater protection.
Disregarding the safety instructions shown in this manual may lead to risks to persons
and equipment.
1
2
3

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Instruction and Maintenance Manual
2.1 PREPARATION AND TRAINING OF STAFF
The personnel involved in the installation, operation, maintenance and control of the
equipment must be properly trained so as to carry out their tasks as eectively as possi-
ble. The responsibility, skills and supervision of the personnel fall within the remit of the
employer. If the sta do not have the appropriate knowledge, they must be duly trained.
If required, the employer may receive proper training directly from EBARA or from the
distributor of this equipment.
2.2 MAINTENANCE
No technical or structural changes to the equipment are permitted without prior approv-
al from EBARA. Only genuine spare parts and accessories authorised by EBARA are
suitable for meeting safety standards. Rebuilding, modifying or using other spare parts
may lead to the invalidation of your warranty.
Sound operation of the equipment depends on whether it is being used in accordance
with the instructions given in this instruction manual. The working conditions and limits
set out in this manual may not be exceeded in any way.
Always keep the nameplates legible and in good condition because the details shown
will be needed for future reference or to request spare parts.
3. TRANSPORT AND STORAGE
If necessary, the equipment must be handled and stored in appropriate packaging. It
must not be stored in damp environments with strong variations in temperature or in
corrosive atmospheres. Condensates may attack the seal areas, metal parts and its
electrical operation. In this case, any claims made under the warranty will be refused.
4. SPECIFICATIONS
Check on the nameplate, the value of total head (HEAD), its capacity (CAP) and the
rotation speed (min-1), as well as the voltage and nominal current rating on the motor
nameplate.
1
2
3
4
5
8
6
9
7
10 11
1. Product code
2. Serial number
3. Flow rate
4. Head
5. Electric pump model
6. Motor power
7. Rotation speed
8. Manufacturing number
9. Eciency at duty point
10. MEI index
11. Production year

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Instruction and Maintenance Manual
The GS pump conforms to the dimensions required by EN 733.
Its applications include climate control and building services, water supply, industry, etc.
Other specifications are shown in the following table:
Pump body in cast iron GG25 (FC250)
Description Standard Optional
2 and 4 poles 2 and 4 poles
Liquid
Temperature -10 to 120ºC -10 to 120ºC
Density in accordance with
requirements in accordance with requirements
Viscosity in accordance with
requirements in accordance with requirements
Maximum operating pressure 16 bar (1.6 MPa) 16 bar (1.6 MPa)
Construction
Impeller Closed Closed
Seal Mechanical Soft shaft
Washing N/A N/A
Rolling bearings With shielded balls With shielded balls
Flange DIN EN1092-2 DIN EN1092-2
Material
Pump body Cast iron GG25 Cast iron GG25
Impeller Cast iron GG20 / GGG40/
Bronze CAC 406 Bronze CAC406
Shaft AISI 431 stainless steel AISI 431 stainless steel
Manifold ring Bronze CAC406 Bronze CAC406
Gaskets EPDM -
Plant Inside (under the roof) Inside (under the roof)
Noise data table
Motor power MEC
50 Hz
2900 min-1
(2 poles) 1450 min-1 (4 poles)
Overall Sound Pressure Level dB(A)
0.37 71 56 44
0.55 80 59 44
0.75 80 59 44
1.1 90 62 49
1.5 90 62 49
2.2 100 67 53
3 100 67 53
4 112 64 56

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Instruction and Maintenance Manual
5.5 132 67 56
7.5 132 67 56
11 160 75 67
15 160 75 67
18.5 180 75 67
22 180 75 67
30 200 75 70
37 225 75 70
45 225 75 70
55 250 77 70
75 280 78 73
90 280 78 73
110 315 80 77
132 315 80 77
160 315 80 77
200 315 80 77
250 355 86 84
315 355 86 84
355 355 86 84
5. OPERATING LIMITS
Unless EBARA has been previously notified, in general, the equipment must be mounted
inside (below roof level), in adequately-ventilated rooms and where access is restricted
to authorised personnel, in addition to working within the following limits:
- Ambient temperature: must not exceed 40°C and the average temperature over 24
hours must not be above 35°C. The minimum air temperature in the space will be 4°C.
- Humidity: humidity must not exceed 50% and a temperature of 40°C. Higher humid-
ity levels can be accepted at very low temperatures.
- Pollution: the air inside the aforesaid space must be clean and non-corrosive or,
failing that, the pollution level must be low and electrically non-conductive through
condensation.
- Altitude: the altitude where the pump is installed must not exceed 1000 metres.
If the conditions of use are dierent from those indicated, EBARA must be notified of
these conditions; such as installation outdoors or in places open to the public; any
temperature, humidity, and altitude values other than those described; heavy pollution
due to dust, fumes, vapours or salt; exposure to strong magnetic or electrical fields;
locations exposed to risks of explosion, mechanical vibrations and significant shocks.

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Instruction and Maintenance Manual
6. INSTALLATION
6.1 INSTALLATION POINT
(1) Install the equipment in an easily-accessible place in order to carry out overhauls and
maintenance.
(2) Prohibit access to unauthorised persons by using related closure points.
(3) Place the equipment as close as possible to the water supply, making sure that the
dierence in height between the water surface and the pump shaft is minimal and that
the length of the suction pipe is as short as possible.
(4) The sum between the suction pressure and the gauge pressure of the pump must
always be less than the minimum permissible pressure (see section 4 - Specifications).
6.2 LIFTING
In order to move the electric pump or the individual pump you must lift the load by
means of straps, creating an angle of less than 60 degrees, as shown in the figure:
One must make sure that there is no personnel
exposed to danger during the operation. To
lift the assembly, do not use the attachment
points of the motor or the pump since they
may not have been designed to bear such a
weight.
6.3 CEMENTED BASE
One should note that electric pump units must be fixed in a stable and durable manner
to a solid cemented base so that the axes of the pumps and the motors always remain
correctly and securely aligned. The cement base must be suciently rigid, permanent
and aligned, as well as being located on ground capable of bearing a permitted load
of adequate support facilities. The top part of the unit must rest completely on the ce-
mented base; once the top part has been secured, the alignment of the coupling needs
to be checked again.
If you need to limit, as much as possible, the vibrations of the equipment by using elastic
dampers, the latter should not be placed directly under the metal profiles, but instead,
you will need to produce a solid plate with a weight of one and a half times or two times
the overall weight of the unit, arranging the dampers under the assembly that combines
the top part with the plate. There are several valid methods although this plate is typical-
ly made with concrete and its dimensions exceed those of the top by about 0.2 metres
on all four sides.

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Instruction and Maintenance Manual
Generally, an incorrect cement base is the cause of premature failure and this invali-
dates the warranty period.
6.4 PIPES
The installation must be done according to the arrangement shown in the Figure:
1 Pump
2 Motor
3 Mount
4 Elastic sleeve
5 Check valve
6 Shut-o valve
7 Bottom valve
8 Eccentric reduction
Min
≥2D
1~1.5D
1~1.5D
D
3
3
7
12
6
5
4
8
1. Make sure that the suction and delivery ducts do not transmit any stresses to the
pump, by installing suciently strong supports. If this is not done, the pump could
become misaligned and even break.
2. Fit any check valves (between the pump and the delivery valve) in the following cas-
es:
- In very long pipes.
- If the head is high.
- If the operation is automatic.
- When you fill a tank under pressure.
- When the operation is in parallel.
3. Mount air relief valves, if required, in those parts of the installation where it is impos-
sible to avoid the formation of air bubbles. However, they must not be fitted at points
where the pressure is less than atmospheric pressure, since the valve would suck in
air rather than expel it.

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Instruction and Maintenance Manual
4. To reduce the eect of a water hammer, mount a check valve with spring.
5. Suction systems:
- The bottom end of the suction pipe must remain submerged and at a depth of at
least twice the diameter of the pipe (2D) and at a distance from the bottom of 1
time to 1 and a half times the diameter (1~1.5 D).
- Fit a bottom valve with a filter at the beginning of the suction pipe to prevent the
entry of any foreign bodies.
- The suction pipe will be installed with an upward gradient towards the pump (of
more than 1%) to avoid the formation of air bubbles. The pipes and other acces-
sories must be connected in such a way so as not to create any air intake between
the dierent elements.
- Make sure that the suction pipe is as short and straight as possible and try to
avoid any unnecessary curves or additional length. Do not install any shut-o
valve in this section.
- Unless the installation project indicates something dierent, use the dimensions
for the suction pipe and eccentric reduction recommended in this Table. The
eccentric reduction will be installed with an upward gradient towards the pump to
avoid the formation of air bubbles.
DN suct. x DN
delivery
1500 RPM 3000 RPM
DN pipe Reduction DN pipe Reduction
50 x 32 65 65x50 80 80x50
65 x 40 80 80x65 100 100x65
65 x 50 100 100x65 125 125x65
80 x 65 125 125x80 150 150x80
100 x 80 150 150x100 200 200x100
125 x 100 200 200x125 250 250x125
150 x 125 250 250x150 300 300x150
200 x 150 300 300x200 --- ---
6. In systems where suction is operational:
- The installation of a shut-o valve is recommended in the suction pipe to facilitate
dismantling and overhauls.
- Install the suction pipe with an upward gradient towards the pump to avoid the
formation of air bubbles.

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Instruction and Maintenance Manual
6.5 ALIGNMENT
Pumps supplied with motors are connected to these through a simple elastic coupling
or with a spacer.
The pumps come on the market after being aligned within the production centre; nev-
ertheless, during installation, the top part usually becomes misaligned due to anchoring
with anchor pins. Therefore, the top part needs to be adjusted by introducing metal
gauges underneath it, and aligning the pump while keeping the distances and dierenc-
es within the limits shown in the Figure.
Dimensions [mm]
External
diameter CWithout spacer With spacer
A B A-B A B A-B
68 < 0.1 2.0 - 4.0 < 0.1 - -
80 < 0.1 2.0 - 4.0 < 0.1 4.0 - 6.0 < 0.1
95 < 0.1 2.0 - 4.0 < 0.1 4.0 - 6.0 < 0.1
110 < 0.1 2.0 - 4.0 < 0.1 4.0 - 6.0 < 0.1
125 < 0.15 2.0 - 4.0 < 0.1 4.0 - 6.0 < 0.1
140 < 0.15 2.0 - 4.0 < 0.1 4.0 - 6.0 < 0.1
160 < 0.2 2.0 - 6.0 < 0.1 5.0 - 7.0 < 0.1
180 < 0.2 2.0 - 6.0 < 0.1 5.0 - 7.0 < 0.1
200 < 0.2 2.0 - 6.0 < 0.1 5.0 - 7.0 < 0.1
225 < 0.25 2.0 - 6.0 < 0.1 5.0 - 7.0 < 0.1
250 < 0.25 3.0 - 8.0 < 0.1 7.0 - 9.0 < 0.1
If the pump was purchased without a motor, but the intention is to connect one during
installation, you will need to correct the shift of the coupling by inserting a plate under the
feet of the motor, by adjusting the disparity according to the range shown in the Figure.
The alignment operation is achieved by removing the coupling guard, although this will
need to be refitted carefully before starting up the pump.

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Instruction and Maintenance Manual
The size of the coupling depends on the power of the motor connected to the pump. For
further information contact EBARA.
6.6 ELECTRICAL SYSTEM
Check that the motor is cooled properly, by leaving the air inlets and outlets unobstruct-
ed. Our recommendation is to install the equipment in a ventilated place away from any
heat source.
The condensate drainage outlets must be located in the lower part of the motor. The
drainage caps can be removed provided that this does not jeopardize the protection of
the motor.
6.6.1 ELECTRICAL CONNECTION
All electrical connections of the equipment must be carried out by qualified personnel
with the power supply switched o.
- Use power supply cables that are adequately sized to carry the maximum current
absorbed by the motor, in addition to the margin set by local requirements; this will
avoid any overheating and/or voltage drops (voltage drops must be less than 3%
during the start-up phase).
- Make sure the cables reach the terminal box with a curve that prevents water from
getting in and running over them.
- The contact surfaces of the connections must be clean and protected against rust.
Do not place any washers or nuts between the terminals on the motor and those
providing access to the mains.
- Check the airtight sealing of the cable gland so as to ensure the degree of protection
indicated on the nameplate.
- Avoid any mechanical stress being transferred to the motor terminals.
- Comply with the current and frequency limits indicated on the nameplate of the mo-
tor.
- It is advisable to install a switch in order to prevent any accidents involving electrical
discharges, and also a protection against power surges for motors with the aim of
avoiding any damage due to overheating.

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Instruction and Maintenance Manual
- Make the connections, as required, in line with the figures:
a) Direct start up (up to 5.5 kW)
Three-phase motor (230/400 v and 400/690V)
L1’ L2’ L3’
L1
U1 V1 W1
W2 U2 V2
L2 L3 L1 L2 L3
L1’ L2’ L3’
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
b) Star-Delta Starter
(Recommended from 5.5 kW)
Three-phase motor
L1’ L2’ L3’
L1
U1 V1 W1
W2 U2 V2
L2 L3 L1 L2 L3
L1’ L2’ L3’
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
L1’ L2’ L3’
L1
U1 V1 W1
W2 U2 V2
L2 L3 L1 L2 L3
L1’ L2’ L3’
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
Lower voltage
(Connection to Delta)
6.6.2 ELECTRICAL MAINTENANCE
Any work on the motor must be carried out with the appliance switched o and after
disconnecting the mains power supply.
- Check on a regular basis that the requirements regarding installation and electrical
connections are complied with.
- Comply with the lubrication schedule for the bearings and the type of grease (if it is
specified on the motor nameplate). Nevertheless, we recommend that bearings are
replaced after three years.
7. OPERATION
7.1 BEFORE STARTING THE PUMP
1. Make sure that the pipes are flushed after the installation is completed, since any
impurities may lead to faults, noise and excess wear around the mechanical closure
and the other parts of the pump.
2. Check that the pump turns easily by spinning the shaft with your hand. If the move-
ment is sti or irregular, check the pump because the mechanical closure may be
damaged, the gasket too tight or there might even be rust inside the pump.
3. Check the operating details of the motor, which are listed on the nameplate.
4. Do not operate the pump without draining it previously. If the system is in suction
mode, the pump and the suction pipe must be filled with water via the relevant de-
vice duly installed on the delivery pipe. If the suction is primed, the pump must be
filled with water by opening the suction and delivery valves. Make sure that no air
Higher voltage
(Connection to Star)

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Instruction and Maintenance Manual
remains inside the pump, to do this, you need to rotate the shaft by hand.
5. Check the direction of rotation of the motor, as shown below:
- Close the delivery and suction valves.
- Switch on the motor for 1 or 2 seconds, then stop it.
- Visually check that the direction of rotation is correct via the connection or the fan
on the motor. The direction of rotation is indicated by an arrow on the pump body.
Generally, it is clockwise (to the right) when the observer is facing the fan on the
motor.
- After removing the coupling guard, put it back immediately after checking the
rotation.
7.2 STARTING THE PUMP
1. Shut o the main delivery valve. Open the suction valve if it is closed.
2. Turn on and o the switch to start the motor once or twice, to ensure that there are
no faults in the start up.
3. When the rotation speed remains stable at the nominal speed, gradually open the
delivery valve.
4. Check that there are no significant variations in the pump pressure and in the current
absorbed by the motor. Check that there are no significant vibrations and/or unusual
noises (5) Follow the same procedure during subsequent start ups if the operating
conditions are normal, observing the instructions in Chapter 8. Maintenance.
7.3 STOPPING THE PUMP
Before stopping the pump you are advised to close the delivery valve gradually.
If the pump stops due to a sudden lack in the power supply, disconnect the motor
switch. This will avoid the pump starting up again as soon as the power supply returns,
thereby endangering sta.
7.4
ADJUSTING THE GASKET (ONLY PUMPS WITH SOFT SHAFT SEAL)
If the pumps have soft shaft seals, make sure there is a moderate flow of water, as
shown in the following table:
Internal diameter of the
gasket (mm) Initial operation (ml/min) Normal operation (ml/min)
33 70 33
43 86 43
53 106 53
60 120 60
70 140 70
80 160 80

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Instruction and Maintenance Manual
1. Initial tension of the gasket
- Tighten the nuts which gradually compress the gasket, until turning the pump
shaft manually becomes dicult.
- Make sure that the two nuts have been tightened evenly.
2. Gasket adjustment
- During the initial operation of the pump, the outflow of water is greater than in
normal operation. Leave the pump running for at least 10 minutes or at the most
half an hour. Make sure that there is no overheating or abnormal noise during this
time.
- Once the initial operation has been completed, adjust the gasket so that the ca-
pacity approaches the values indicated on the table. Gradually continue to tighten
the gasket so that it takes between 10 minutes and half an hour to become secure,
otherwise the gasket may become locked.
- During normal operation, never tighten the gasket until the outflow of water is
non-existent.
3. Gasket replacement
Replace the gasket in the following circumstances:
- Every time you dismantle the pump, for example at each maintenance
- When there is no more play enabling the gasket to be tightened
- When the outflow of water can no longer be adjusted
If you find serious damage due to wear on the shaft surface (wear to a depth of 0.7
mm), it must be replaced with a new shaft.
Always replace the gasket with a new one, by placing the rings in a staggered man-
ner so that the cuts do not coincide but actually dier from between 90 to 120 de-
grees.
8. MAINTENANCE
Maintenance operations must be performed by qualified personnel: an error may lead
to damage caused by electrical discharge, fire or malfunctions that in turn could lead to
an accident.
Make sure that the operating power switch is disconnected during maintenance; the
pump could start up suddenly if it is in automatic mode.
If the liquid being pumped is hot water, keep at a safe distance until it has cooled down.
Similarly, do not touch the surface of the motor without making sure that the tempera-
ture has dropped to a tolerable level.

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Instruction and Maintenance Manual
8.1 DAILY INSPECTION
1. Significant variations in pressure, capacity, electricity, vibrations or noise may be a
sign of a malfunction of the pump. Refer to the table “Failures and Measures to be
taken”. It is advisable to keep a daily register on the operating conditions with a view
to quickly discovering any symptoms that may be the result of a potential failure.
2. The maximum temperature for the bearing is 40°C above the ambient temperature,
with a maximum total limit of 80°C.
3. Generally, the mechanical seal does not show any leaks. Sometimes, at the begin-
ning of operation there is a small leak of water which then gradually decreases. If,
during normal operation, there is a major leak of water, you meed to replace the seal.
If it has a soft shaft seal, check whether there is a slight dripping of water.
4. The following figure shows the vibration values for the system under normal oper-
ating conditions. Excessive vibrations may be due to wear, stressed pipes or the
loosening of the anchor bolts of the top part.
Permitted vibration range (1/1000 mm)
Speed (RPM)
8.2 PRECAUTIONS DURING OPERATION
1. Operating the pump for a long period of time with the delivery valve closed may cause
damage to some of the pump components due to overheating inside the pump.
2. Too many stops and starts can cause damage to the pump. Limiting the number of
starts is recommended in line with the following:
N ≤ 6 when P ≤ 7.5 kW
N ≤ 4 when 11 kW ≤ P ≤ 22 kW
N ≤ 3 when P>22 kW
N = start ups/h
P = motor power

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8.3 PRECAUTIONS DURING STORAGE
1. The pump body may fracture if the water inside freezes; insulate the pump or remove
all the water from the inside.
2. If you have any spare pumps, you must perform test runs on them on a regular basis
and keep them ready for use at all times.
3. When a pump remains o for a long period of time, you must take great care to
prevent any oxidation on the surface of the bearing, shaft, coupling, etc. The gasket
may also become mouldy. To avoid this, remove the gasket, dry it and grease it and
then put it back in its position.
8.4 REPLACING PARTS
Replace worn parts according to the following table:
Piece Status Replacement period
Mechanical seal Water leakage Yearly
Soft shaft seal It becomes impossible to
control water dripping Yearly
Rolling bearings Excessive noise or vibration Every 2 or 3 years
Pump body O-ring After every dismantling ---
Coupling rubber parts As soon as any signs of
damage appear Yearly
This replacement period is an average and refers to normal operating conditions.
The table, below, shows the number and size of the parts to be replaced, according to
the model of the pump:
Pump model Bearings (x2) Mechanical seal* (shaft diameter in
mm)
Soft shaft seal:
Gasket rings (x4) Gasket unit (x1)
32-125.1 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
32-125 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
32-160.1 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
32-160 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
32-200.1 6306ZZ 28 33 x 49 x 8 3.53 x 234.54

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Pump model Bearings (x2) Mechanical seal* (shaft diameter in
mm)
Soft shaft seal:
Gasket rings (x4) Gasket unit (x1)
40-250 6306ZZ 28 33 x 49 x 8 3.53 x 278.99
40-315 6308ZZ 38 43 x 63 x 10 3.53 x 355.19
50-125 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
50-160 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
50-200 6306ZZ 28 33 x 49 x 8 3.53 x 234.54
50-250 6306ZZ 28 33 x 49 x 8 3.53 x 278.99
50-315 6308ZZ 38 43 x 63 x 10 3.53 x 355.19
65-125 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
65-160 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
65-200 6306ZZ 28 33 x 49 x 8 3.53 x 234.54
65-250 6308ZZ 38 43 x 63 x 10 3.53 x 278.99
65-315 6308ZZ 38 43 x 63 x 10 3.53 x 355.19
80-160 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
80-200 6308ZZ 38 43 x 63 x 10 3.53 x 234.54
80-250 6308ZZ 38 43 x 63 x 10 3.53 x 278.99
80-315 6308ZZ 38 43 x 63 x 10 3.53 x 355.19
80-315 L 6310ZZ 48 53 x 73 x 10 3.53 x 355.19
80-400 6310ZZ 48 53 x 73 x 10 5.33 x 456.06
100-160 6308ZZ 38 43 x 63 x 10 3.53 x 183.74
100-200 6308ZZ 38 43 x 63 x 10 3.53 x 234.54
100-250 6308ZZ 38 43 x 63 x 10 3.53 x 278.99
100-315 6308ZZ 38 43 x 63 x 10 3.53 x 355.19
100-315 L 6310ZZ 48 53 x 73 x 10 3.53 x 355.19
100-400 6310ZZ 48 53 x 73 x 10 5.33 x 456.06
125-200 6308ZZ 38 43 x 63 x 10 3.53 x 234.54
125-250 6308ZZ 38 43 x 63 x 10 3.53 x 278.99
125-250 L 6310ZZ 48 53 x 73 x 10 3.53 x 278.99
125-315 6310ZZ 48 53 x 73 x 10 3.53 x 355.19
125-400 6310ZZ 48 53 x 73 x 10 5.33 x 456.06
125-500 6312ZZ 55 60 x 85 x 12.5 5.33 x 532.26
150-200 6308ZZ 38 43 x 63 x 10 3.53 x 234.54

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32-200 6306ZZ 28 33 x 49 x 8 3.53 x 234.54
32-250 6306ZZ 28 33 x 49 x 8 3.53 x 278.99
40-125 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
40-160 6306ZZ 28 33 x 49 x 8 3.53 x 183.74
40-200 6306ZZ 28 33 x 49 x 8 3.53 x 234.54
150-250 6310ZZ 48 53 x 73 x 10 3.53 x 278.99
150-315 6310ZZ 48 53 x 73 x 10 3.53 x 355.19
150-400 6310ZZ 48 53 x 73 x 10 5.33 x 456.06
150-400 L 6312ZZ 55 60 x 85 x 12.5 5.33 x 456.06
150-500 6314ZZ 65 70 x 95 x 12.5 5.33 x 532.26
200-400 6314ZZ 65 70 x 95 x 12.5 5.33 x 456.06
200-500 6316ZZ 75 80 x 109 x 14.5 5.33 x 532.26
* Seal measurements DIN 24960 UN
8.5 TROUBLESHOOTING
Although the equipment usually functions according to the user's requirements, in some
cases its operation may not come up to expectations due to problems with the system
or the power supply. The following table may be useful in finding possible solutions in
the event of failures or malfunctions:
PUMP
Fault Causes Measures to be taken
The motor will not start. - The control panel is not
working correctly. - Check all conditions.
- Motor failure. - Repair the motor.
- Faults in the power supply. - Check and repair.
- Rotate it by hand.
Reassemble.
- Friction on rotation shaft. - Repair in specialist
workshop.
- Pump clogged. - Remove foreign bodies.
There is no priming. - Foreign bodies in the
bottom valve. - Remove foreign bodies.
- Malfunction in the bottom
valve. - Replace the valve.
- Water leakage from the
suction pipe. - Check the suction pipe.

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- Air entering the suction pipe
or seal. - Check the suction pipe and mechanical seal.
The pump has no flow
rate - The pump does not turn. - Check that the impeller is free.
- The delivery valve is closed
or half-closed. - Open the valve.
- The suction head is too
high for the pump. - Check the project.
Low flow rate - The direction of rotation is
not correct. - Correct the electrical connections.
- Low rotation speed. - Measure the RPM with a
tachometer.
- Low voltage. - Check the power supply.
- Blocking in the bottom
valve or in the filter. - Remove foreign bodies.
- Impeller is blocked. - Remove foreign bodies.
- Pipe clogged. - Remove foreign bodies.
- Air entering the system. - Check and repair the
suction pipe and shaft seal.
- Leakage in the delivery
pipe. - Check and repair.
- Impeller worn. - Check the impeller.
- Significant head losses in
the system. - Review the project.
- Liquid temperature very
high. The liquid is volatile. - Review the project.
- Cavitation. - Seek expert advice.
Water comes out
initially and then stops
abruptly.
- The pump has not been
primed. - Prime the pump correctly.
- Air entering the system. - Check and repair the
suction pipe and shaft seal.
- Air bubbles in the suction
pipes. - Vent the pipes.
- The suction head is too
high for the pump. - Review the project.