Xylem LOWARA VOGEL Series Manual

en Model: WTS Installation, Operation and Maintenance Instruction
Translation of the Original Operation Manual
en Keep for further use !
Pay attention to this operating instruction before the delivery, installation, start-up a.s.o.!
VOGEL SERIES

Operating instructions
Table of Contents
1. General ............................................................................................
1.1 Foreword
1.2 Guarantee
1.3 Safety regulations
1.4 Safety instructions
Dangers of not following safety instructions
Safety instructions for the operator
Speed, Pressure, Temperature
Protection against running dry
Back flow
2. Description
.......................................................................................
2.1 Model
Design
2.2 Permissible Temperatures
2.3 Bearings and Lubrication
Design with Medium Lubricated Slide Bearings
Design with Pure Water Lubricated Slide Bearings
Design with Grease Lubricated Slide Bearings
2.4 Drive and Control
Manual Switching
Automatic Control
3. Transport, Handling, Storage ..........
..............................................
3.1 Transport, Handling
3.2 Storage
4. Assembly, Operation
.......................................................................
4.1 Preparing for Installation
4.2 Assembling and Installing the Pump
4.3 Connecting the Pipes to the Pump
4.4 Electrical connection
4.5 Starting up
Lubrication the Slide Bearings
Setting the Level Switch
Initial Operations
After Switching On
Restarting
4.6 Operation and Monitoring
Permissible Number of Operations
4.7 Shutting down
4.8 Dismantling
5. Maintenance, Servicing
...................................................................
Storage
Cleaning the pump
6. Longer periods of non-operation
...................................................
7. Faults - Causes and Solutions ........................................................
page 3
page 6
page 9
page 10
page 14
page 14
page 14
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Operating instructions
8. Repairs ..............................................................................................
9. Spare Parts, Spare Pumps ..............................
................................
9.1 Spare Parts
Ordering Spare Parts
9.2 Stand-by Pumps
10. Plant Manager List
........................................................................
11. Log Book ......................................................
...................................
Appendix
page 17
page 17
page 19
page 20
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Operating instructions
1. General
1.1 Foreword
This product complies with the safety requirements of EC Machinery Directive 2006/42/EC.
The staff employed on installation, operation, inspection and maintenance must be
able to prove that they know about the relevant accident prevention regulations and
that they are suitably qualified for this work. If staff do not have the relevant
knowledge, they should be provided with suitable instruction.
The operating safety of the pumps or units (i.e. pump plus motor) supplied is only guaranteed if
these are used in accordance with the provisions given in the Confirmation of Order and/or Point 4
in „Installation and Operation“.
The operator is responsible for following the instructions and complying with the safety
requirements given in these Operating Instructions.
Smooth operation of the pump or pump unit can only be achieved if installation and maintenance
are carried out carefully in accordance with the rules generally applied in the field of engineering
and electrical engineering.
If not all the information can be found in these Operating Instructions, please contact us.
The manufacturer takes no responsibility for the pump or pump unit if the Operating Instructions
are not followed.
These Operating Instructions should be kept in a safe place for future use.
If this pump or pump unit is handed on to any third party, it is essential that these Operating
Instructions and the operating conditions and working limits given in the Confirmation of Order
are also passed on in full.
These Operating Instructions do not take into account all design details and variants nor all the
possible chance occurrences and events which might happen during installation, operation and
maintenance.
Alterations or changes to the machine are only permitted by agreement with the manufacturer.
Original spare parts and accessories authorised by the manufacturer should be used for greater
safety. We bear no responsibility for the consequences of using other parts.
We retain all copyright in these Operating Instructions; they are intended only for personal use by
the owner of the pump or the pump unit. The Operating Instructions contain technical instructions
and drawings which may not, as a whole or in part, be reproduced, distributed or used in any
unauthorised way for competitive purposes or passed on to others.
1.2 Guarantee
The guarantee is given in accordance with our Conditions of Delivery and/or the confirmation of
order.
Repair work during the guarantee period may only be carried out by us, or subject to our written
approval. Otherwise the guarantee ceases to apply.
Longer-term guarantees basically only cover correct handling and use of the specified material.
The guarantee shall not cover natural wear and tear and all parts subject to wear, such as
impellers, shaft sealings, shafts, shaft sleeves, bearings, wear rings etc., or damage caused by
transport or improper handling.
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Operating instructions
In order for the guarantee to apply, it is essential that the pump or pump unit is used in accordance
with the operating conditions given on the type plate and in the Confirmation of Order. This
applies particularly for the endurance of the materials and smooth running of the pump and shaft
sealing.
If one or more aspects of the actual operating conditions are different, we should be asked to
confirm in writing that the pump is suitable.
1.3 Safety regulations
These Operating Instructions contain important instructions which must be followed when the
pump is assembled and commissioned and during operating and maintenance. For this reason,
these Operating Instructions must be read by the skilled staff responsible and/or by the operator of
the plant before it is installed and commissioned, and they must be left permanently ready to hand
at the place where the pump or pump unit is in use. The operator must ensure that the contents of
the Operating Instructions are fully understood by the staff. The operator must confirm this by
signing the „Plant Manager List“ (see Point 10). These Operating Instructions do not refer to the
General Regulations on Accident Prevention or local safety and/or operating regulations. The
operator is responsible for complying with these (if necessary by calling in additional installation
staff).
The safety instructions contained in these Operating Instructions have the following special safety
markings as specified in DIN 4844:
Warning against personal accidents which could occur if the safety instructions
given in this part of the Operating Instructions are not followed.
Warning against dangerous electrical voltage.
Warning against possible damage to property or the environment.
It is absolutely essential that safety information affixed directly to the pump or pump unit is
followed and maintained so that it is always easily legible.
1.4 Safety instructions
Dangers of not following safety instructions
Failure to follow the safety instructions can result in the following, for example:
•People being at risk because of electrical, mechanical and chemical factors.
•Important functions of the pump or pump unit failing.
•Dangers to the environment as a result of dangerous substances leaking out.
Please
note
WTS 102/3-en 4

Operating instructions
Safety instructions for the operator
•Depending on the operating conditions, wear and tear, corrosion or age will limit the working
life of the pump/pump unit, and its specified characteristics. The operator must ensure that
regular inspection and maintenance are carried out so that all parts are replaced in good time
which would otherwise endanger the safe operation of the system. If abnormal operation or any
damage are observed, the pump must cease operation immediately.
•If the breakdown or failure of any system or unit could lead to people being hurt or property
being damaged, such system or unit must be provided with alarm devices and/or spare modules,
and they should be tested regularly to ensure that they function properly.
•If there is any risk of injury from hot or cold machine parts, these parts must be protected against
contact by the user, or suitable warning signs must be affixed.
•Contact protection on moving parts (e.g. coupling guards) must not be removed from systems
that are in operation.
•If dangerous media (e.g. explosive, toxic, hot) leak out (e.g. from shaft seals), these must be
directed away so that there is no danger to people or the environment. The provisions of the law
must be observed.
•Measures should be taken to exclude any danger from electricity (e.g. by complying with the
local regulations on electrical equipment). If work is carried out on live electrical components,
they should be unplugged from the mains or the main switch turned off and fuse unscrewed. A
motor protection switch is to be provided.
•Basically, all work on the pump or pump unit should only be carried out when the pump is
stationary and not under pressure. All parts must be allowed to return to ambient temperature.
Make sure that no-one can start the motor during such work. It is essential that the procedure for
stopping the system described in the Operating Instructions is observed. Pumps or pump systems
that carry media that are dangerous to health must be decontaminated before being taken apart.
Safety Data Sheets for the various liquids handled. Immediately the work has been completed,
all safety and protective devices must be replaced or restarted.
•Under EC Machinery Directives, every machine must be fitted with one or more emergency
command devices by which situations which represent an immediate danger or which could later
be dangerous can be avoided. This does not include machines in which the emergency switches
cannot reduce the danger, either because they do not reduce the time required to stop the
machine or because the do not allow the measures required by the danger to be taken. This
emergency switch must:
have controls that are clearly marked, easy to see and within easy reach;
stop the dangerous movement as quickly as possible without causing any additional danger;
trigger any specified safety movements or allow these to be started up.
If the emergency command device is no longer operated after an emergency „off“ switch has
been triggered, this must be maintained by blocking the emergency command device until it is
released again. It should not be possible to block the device without this triggering an emergency
„off“ switch. It should only be possible to release the device through an appropriate action; this
release should not start the machine up again - it should only make it possible to start it up again.
•If the power supply is interrupted or restored after being interrupted or if it is changed in any
other way, this should not cause any danger (e.g. pressure surges).
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Operating instructions
Speed, Pressure, Temperature
Suitable safety measures must be taken at the plant to ensure that the speed, pressure and
temperature of the pump do not exceed the limit values given. In addition, the pump must be
protected against pressure surges such as can be caused by switching off the plant quickly (e.g. by
non-return valve on the pressure side, flywheel, air vessel).
Protection against running dry
WTS-Pumps in Industrial design with mediumly lubricated slide bearings may not run dry under
any circumstances as this could damage the bearings.
If necessary provide for monitoring devices (e.g. Flow Switch for pure water lubrication) to ensure
a continual flow of lubricant.
Back flow
There is no back stop for the pumping medium fitted in the pump itself. If flow back from the
pressure line into the collecting shaft has to be avoided a suitable non-return valve or something
similar should be attached to the pressure joints.
2. Description
2.1 Model
Block-free non-chokable pump, rod design with drive above the shaft cover.
Design
Open vortex impeller therefore absolutely free flow through the pump casing. Shaft with two or
more bearings, maintenance-free deep groove ball bearing on the drive side. Rod bearings with
bronze bearing bushes and running sleeve of stainless steel. Bearing lubrication through the
pumping medium (if pumping media are pure and non-abrasive) or alternatively through pure
water or grease (if pumping medium is very dirty). Pressure pipe joints are drawn high by the
covering plate.
Please see the Appendix for the sectional drawings and index of parts as well as a scale drawing.
The pump specification shows the characteristic curve, installation length, materials, lubrication
type and motor output.
Example of a Type Specification:
452 WTS 20 E 1104
Shaft pump: Model WTS, installation depth 1,900 mm, hydraulic data according to characteristic
curve 5, industrial design with pure water lubricated sliding bearings, impeller rated diameter 20
cm, standard sealing, cast iron pump components, Motor 11 kW, 4-pole (approx. 1,450 min-1).
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Operating instructions
Specification Diagram:
2
Installation depth 900 mm
3
Installation depth 1400 mm
4
Installation depth 1900 mm
5
Installation depth 2400 mm
6
Installation depth 2900 mm
7
Installation depth 3400 mm
1
2
4
Characteristic curves
5
6
-
Standarddesign
1
Industrial design, medium lubricated slide bearings
2
Industrial design, pure water lubricated slide bearings
3
Industrial design, grease lubricated slide bearings
W
T
S
1
8
Code no for impeller, approx. diameter in cm
E
Sealing with radial packing ring and gease chamber
N
N
Cast iron
S
S
Bronze
V
V
Cast steel alloyed
1
1
0
Motor power in 1/10 kW
4
Normal speed 1450 min-1
6
Normal speed 960 min-1
*) not required for normal cast iron model
Characteristic curves:
Capacity [m3/h]
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Operating instructions
2.2 Permissible Temperatures
The values stated in the Confirmation of Order always apply. It is not permitted to exceed or go
below these values. If no temperature is given in the Confirmation of Order the maximum
permissible pumping medium temperature is 95° C.
2.3 Bearings and Lubrication
The roller bearing situated above the shaft takes up the axial forces and radial forces which occur
near the coupling. It is filled with grease for its life cycle and thus requires no maintenance.
Depending on the installation length the pump has 1 (at an installation length of 1,900 mm or less)
or 2 (at an installation length of more than 1,900 mm) slide bearings for guiding the shaft into the
shaft area.
Design with Medium Lubricated Slide Bearings
•The pumping medium may not contain any abrasive elements.
•Make sure that all slide bearings are flooded when the pump is switched on (at installation
lengths of more than 1,900 mm also the upper rod bearing).
•Otherwise no maintenance required.
Design with Pure Water Lubricated Slide Bearings
•During pump operations pure water must be fed to the slide bearings. If pumping media tend to
conglutinate or leave deposits it may be necessary to leave the pure water supply switched on
even when the pump is at a standstill.
•On the upper surface of the base plate, a pure water connection with an R 1/4“ internal screw
thread is provided for every sliding bearing.
•Water consumption of approx. 1,5 litre/min at a pressure of 3 bar is to be expected per sliding
bearing.
Design with Grease Lubricated Slide Bearings
•On the upper surface of the base plate a connection with an internal screw thread R 1/4“ is
provided. 3 to 5 grammes of grease per day are required per bearing. We recommend grease with
a consistency of NLGI grade 2. Always use grease with the same base.
•The lubricating pipes are delivered filled with lithium soap grease.
The grease consumed enters the pumping medium. Take care that it does not pose
an environmental hazard.
2.4 Drive and Control
Driven by four or six pole vertical three phase induction motors.
Manual Switching
If no automatic control is provided the pump must be switched on and off by hand.
Please
note
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Operating instructions
Automatic Control
•Automatic Operations can be attained by fitting a mercury level switch (e.g. Type NGE) or an
electrode switch.
•The switching device needed to turn the motor on and off (circuit breaker ,Y-∆-automatic circuit
breaker) must be suitable for momentary contact control.
•An alarm switch functioning independently of the mains can be fitted if desired.
3. Transport, Handling, Storage
3.1 Transport, Handling
•Check the pump/pump unit immediately upon delivery/receipt of despatch for damage or
missing parts.
•The pump/pump unit must be transported carefully and by competent personnel. Avoid serious
impacts.
•Keep the pump/pump unit in the same position in which it was supplied from the factory. Take
note of the instructions on the packaging.
•The intake and discharge side of the pump must be closed with plugs during transport and
storage.
Dispose of all packing materials in accordance with local regulations.
•Lifting devices (e.g. fork-lift truck, crane, crane device, pulleys, sling ropes, etc.) must be
sufficiently strong. The weight of the pump/pump unit is given in the Data Sheet.
•The unit may only be lifted by the hooks provided (on the upper side of the base plate). The
following illustration shows the correct method of carrying by crane.
Sling ropes must not be fixed to ends of shafts or the ring
loops of the motor.
Do not stand underneath suspended loads; take note of the
general regulations on prevention of accidents.
The pump/pump unit must be secured against tipping over and
slipping until it has been fixed in its final location.
Please
note
Please
note
WTS 102/3-en 9

Operating instructions
3.2 Storage
Pumps or pump units that are stored for a long time before use must be protected against moisture,
vibrations and dirt (e.g. by wrapping in oil paper or plastic sheeting). Pumps must basically be
stored in a place where they are protected from the weather, e.g. under cover. During this time, all
suction and discharge branches and all other intakes and outlets must be closed with dummy
flanges or plugs.
4. Assembly, Operation
4.1 Preparing for Installation
•Before installing the pump the opening in the shaft cover must be checked according to the
dimensions contained in the Installation Diagram (No. M 473 in the Appendix).
•The seat for the base plate (Position 380 in the sectional drawing) must be horizontal.
•The shaft must be at least 100 mm deeper than the installation length of the pump (from the
plate seat to the lower surface of the pump).
4.2 Assembling and Installing the Pump
Make sure that there is sufficient space for service and maintenance work to be
carried out, especially for changing the drive motor or the whole pump unit.
The motor ventilator must be able to take in sufficient cooling air.
There must be at least 10 cm distance between the suction grid and a wall etc.
Pumps with an installation length of more than 1,900 mm are delivered in two parts which must
be fitted together as follows before being installed in the shaft.
The part of the pump which has the lower rod mounted is laid on top of the shaft cover by means
of pipe support clamps over the port. After the wooden wedges and fork have been removed the
unit's drive part can be put in place.
In addition, the shaft coupling 340
must be slipped onto the shaft
324/U, enabling the rod bearing
screws or pressure pipe screws to be
tightened. Then raise the shaft
324/U with the two screwdrivers by
the two lower bore holes of the rod
pipe 305/U lying opposite each
other (see illustration), until the two
shaft screws S4 can be screwed in
the shaft groove provided through
the two upper bore holes. Both shaft
screws must be secured with either
Please
note
WTS 102/3-en 10

Operating instructions
a screw locking liquid or a centre punch mark. Afterwards when the pipe support clamp has been
removed, the pump can be lowered to plate 380 and after inserting the O-ring supplied (to seal
against smell) screwed to the foundation frame.
To seal against smell place the sealing discs supplied underneath the plate screw fitting (screw
head or hexagon nut).
4.3 Connecting the Pipes to the Pump
•When laying the pipes make sure that the pump is accessible for maintenance and assembly.
•Connect pressure line with the nominal width 100 above the plate in such a way that the pump
will not be subject to stress during operation due to pipe torque.
•If pipes are to be connected with an elastic tension clamp the pipes must have an external
diameter of 108 mm.
•Before connecting to the pump: Remove protective coverings from the pump supports.
•Before starting operations remove coarse impurities from the pump shaft.
•When emptying the pipes and pump shaft make sure that the pump is suitably conserved
(otherwise it can rust which will cause problems when operations are started).
4.4 Electrical connection
The electrical connection work may only be carried out by an authorised
professional. The rules and regulations valid for electrical technology, especially
those concerned with safety measures, must be observed. The regulations of the
national power supply companies operating in that area must also be observed.
Details about electrical connections you can see in the operating instruction of the motor.
4.5 Starting up
The plant may only be started up by people who are familiar with the local safety
regulations and with these Operating Instructions (especially with the safety
regulations and safety instructions given here).
Lubricating the Slide Bearings
•Pure water or grease for lubricating slide bearings must be supplied to the slide bearings before
the pump is taken into operation for the first time, see Point 2.3 „Storage and Lubrication“.
•If the lubricant supply is switched on and off automatically with the pump, lubricant must be
applied to the slide bearings a few seconds before the pump is started.
•Only switch off the pure water or grease supply after the pump has been turned off.
•If there is danger of frost insulate the lubricant pipes or protect with an additional frost
protection heating system.
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Operating instructions
Setting the Level Switch
Guide the cables of any level switches through the cable stuffing box of the switch cover 382/S
and and clamp according to the desired switching levels.
Initial Operations
Remember that when starting against closed pressure line valves the power consumed by the
pump is converted to heat and and discharged to the pumping medium. This can lead to
impermissible warming of the pumping medium after a relatively short time which can damage
the pump's inner fittings. Therefore after the pump has reached operating speed, the pressure side
valve should be opened as quickly as possible.
•Medium lubricated slide bearings must be flooded.
•Start pure water or grease lubrication.
•Check whether all safety devices are ready for operation.
•Check the switch level setting (the lowest water level must guarantee sufficient water coverage).
•Stay away from danger area containing live parts or parts under pressure.
•Check direction of rotation by switching on and off briefly. It must be the same as the directional
arrow on the bearing frame. To change the direction of rotation, see Point 4.4 „Electrical
Connection“. If the direction of rotation is correct, the flow rate will increase and running will be
quieter.
•Start drive device. With manual Y/∆-switching, note information in Point 4.4 „Starting“.
•Οpen any slide valves present in the pressure line.
•Work on the pump may only be carried out when the current has been switched off and the
movable parts are no longer turning. Switching on by unauthorized persons is to be prevented
by appropriate measures.
•In case of failure, e.g. motor does not start, fuses blow or the motor protection switch is
activated immediately, on no account should you repeat the starting procedure (danger of excess
pressure in motor due to impermissible warming). Detect cause of fault and repair.
After Switching On
•Τhe direction of rotation can also be checked after switching on. This is done by comparing the
flow rate and running noise of the pump. To change the direction of rotation, see Point 4.3. If the
direction of rotation is correct, the flow rate will increase and running will be quieter.
•Check current uptake and running of machine.
•If faults occur, see chapter 7 „Faults - Detection and Repair“.
Restarting
Basically, the same procedure should be followed as for starting up for the first time. However,
there is no need to check the direction of rotation of the pump unit.
4.6 Operation and Monitoring
Be particularly careful not to touch hot machine parts. Remember that
automatically controlled systems may switch themselves on suddenly at any time.
Suitable warning signs should be affixed.
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Operating instructions
Regular monitoring and maintenance will extend the life of your pump or pump
system.
•You must observe the area of application given in the Confirmation of Order.
•Do not exceed the output given on the motor rating plate.
•Running dry, running against a closed pressure side valve or operating in the steam phase of the
pumping medium are to be avoided at all costs.
•Avoid sudden changes in temperature (temperature shocks).
•The pump and the drive machine should run evenly and with no vibrations, check at least once a
week.
•Check functioning of the lubricant supply.
•When operating on automatic control:
Check that switching functions are working properly.
if using pure water or grease lubrication leave the lubricant supply switched on during standstill
times unless the supply is automatically switched on or off with the pump (see Point 4.5
„Starting up“).
•Pumps which are exposed to corrosive chemicals or to wear through abrasion must be inspected
periodically for corrosion or wear and tear. The first inspection should be carried out after six
months. All further inspection intervals should be determined on the basis of the state of the
pump.
Permissible Number of Operations
At a motor output up to and including 7,5 kW a maximum of 40, at higher output a maximum of
20 starts per hour are permitted.
4.7 Shutting down
•Close slide valve in discharge pipe. This is not necessary if there is a spring-loaded non-return
valve.
•Switch of motor (make sure it runs down quietly).
•Switch off the pure water or grease lubricant unless a continuous supply of lubricant is necessary
due to the nature of the pumping medium (e.g. sticky) or the pump is being operated on
automatic control.
•If there is any danger of freezing, empty pump and pipes completely.
4.8 Dismantling
The operator's or manufacturer's fitters should be informed as to the nature of the
liquid handled. In the case of pumps handling dangerous liquids, the liquid
handled should be disposed of by environmentally acceptable means before the
pump is dismantled.
•Before starting to disassemble the pump unit make sure that it cannot be switched on again.
•Pressure line shut-off must be closed.
•All components must have cooled down to ambient temperature.
•Before dismantling the pressure line make sure that it is empty and depressurised.
•When the pump has been dismantled: Secure the opening of the shaft.
Please
note
WTS 102/3-en 13

Operating instructions
5. Maintenance, Servicing
Work should only be carried out on the pump or pump unit when it is not in
operation. You must observe Point 1.4 „Safety instructions“.
Maintenance and servicing work must only be carried out by trained, experienced
staff who are familiar with the contents of these Operating Instructions, or by the
Manufacturer's own service staff. The work carried out must be duly entered in the
„Log Book“ (see Point 11) and confirmed by being signed.
Storage
•After 4 years renew the deep groove ball bearings (K) as the grease ages and loses its lubricity.
•After an average of 5 years the grease in the motor bearings has aged so much that we
recommend that you change the bearings.
Cleaning the pump
Dirt on the outside of the pump reduces heat discharge. Therefore the parts of the pump above the
base plate must be cleaned with water at regular intervals (depending on how dirty they are).
The pump should not be cleaned with pressurised water - water will get into the
bearings.
6. Longer periods of non-operation
When starting up, follow the instructions for starting up for the first time (see Point
4.5)!
•Turn the pump shaft by hand at least 1x week before starting operations again. This can take
place at the motor ventilator but you must make absolutely sure that the motor cannot be
switched on either automatically or manually during the examination.
•If the lubrication of the slide bearings is guaranteed: Switch the pump on and then off again
immediately.
•After 4 years renew the pump's deep groove ball bearing (K) and the motor bearing as the grease
ages and loses its lubricity.
•After an average of 5 years the grease in the motor bearings has aged so much that we
recommend that you change the bearings.
7. Faults - Causes and Solutions
The following notes on causes of faults and how to repair them are intended as an aid to
recognising the problem. The manufacturer's Customer Service Department is available to help
repair faults that the operator cannot or does not want to repair. If the operator repairs or changes
the pump, the design data on the Data Sheet and Points 1.2-1.4 of these Operating Instructions
Please
note
Please
note
Please
note
WTS 102/3-en 14

Operating instructions
should be particularly taken into account. If necessary, the written agreement of the manufacturer
must be obtained.
Faults
Code no. for cause and method of repair
Discharge too low
1, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14
Discharge stops after a time
8, 10, 11, 21
Head too low
2, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 21, 24
Head too high
3, 5, 24
Drive mechanism overloaded
2, 3, 5, 14, 17, 19
Pump not running quietly
7, 10, 13, 15, 16, 17, 20, 21, 23
Temperature in the pump too high
7, 10, 21
Temperature at the bearing too high
2, 3, 16, 17, 18, 20, 22
Meaning of code number for cause and method of repair
1. Back-pressure too high
•open discharge valve further
•reduce resistance in discharge pipe (e.g. clean filter if necessary)
•use larger impeller (note available motor power)
2. Back-pressure too low, discharge too low
•throttle discharge valve
3. Speed too high
•reduce speed
•compare speed of motor with specified pump speed (rating plate)
•when adjusting speed (frequency transformer) check reference value setting
4. Speed too low
•increase speed (check available motor power)
•compare speed of motor with specified pump speed (rating plate)
•when adjusting speed (frequency transformer) check reference value settings
5. Impeller diameter too large
•use smaller impeller
6. Impeller diameter too small
•
use larger impeller (check available motor power)
7. Pump and/or pipes not completely filled with liquid
•fill
•
vent
8. Pump blocked
•clean
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Operating instructions
9.
Air pocket in pipeline
•vent
•improve course of pipe
10. NPSH of system too small
increase liquid level
11. Air being sucked in
•increase liquid level
12. Direction of rotation is wrong
•swap over two phases of power supply (to be done by a specialist electrician)
13. Inner components suffering from wear
•replace worn parts
14. Density and/or viscosity of liquid handled is too high
•seek assistance
15. Impeller out of balance
•remove blocks/deposits
•replace if broken or unevenly worn
•check shafts to ensure that they are running true
16. Coupling distance too small
•
change
17. Forces in pipeline too high (pump unit under strain)
change (support pipes, use compensators, etc.)
18. Too much, too little or the wrong type of lubricant
•change
19. Electricity supply not right
•check voltage of all phases (2-phase running)
•check cable connections
•check fuses
20. Bearing damaged
•replace
•check lubricant and bearing space for pollutants (rinse oil area)
21. Discharge too small
•
increase minimum amount carried (open slide valves, bypass)
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Operating instructions
22.
Discharge too high
•reduce amount carried (throttle slide valve)
23. System-related vibrations (resonance)
•seek assistance
24. Manometer indicator wrong
•check manometer
•get rid of blockages
•put manometer in suitable place (no flow distortion or burbling)
8. Repairs
Repairs to the pump or pump system may only be carried out by authorised skilled
personnel or by the manufacturer's specialist staff.
We would be pleased to send you detailed repair instructions on request. Trained Customer
Service engineers are available to assist with installation and repair work on request.
When removing the pump or the motor, you must comply with Point 1.4 „Safety instructions“,
Point 3.1 „Transport, Handling“ and Point 4.8 „Dismantling“.
9. Spare Parts, Spare Pumps
9.1 Spare Parts
Spare parts should be selected to last for two-years continuous operation.
If no other guidelines are applicable, we recommend that you stock the number of parts listed
below (in accordance with VDMA 24296).
Number of Pumps (incl. Stand-by Pumps)
2 3 4 5 6/7 8/9 10/more
Spare Part
Number of Sare Parts
impeller
1
1
1
2
2
3
30%
shaft with key and shaft screws/nuts sets
1
1
2
2
2
3
30%
bearing
1
1
2
2
3
4
50%
joints for pump casing
4
6
8
8
9
12
150%
other joints sets
4
6
8
8
9
10
100%
drive unit, completed
-
-
-
-
-
1
2
Elastic coupling elements Sätze
1
1
2
2
2
3
30%
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Operating instructions
To ensure optimum availability, we recommend that suitable quantities of spare
parts are held in stock, especially if these are made from special materials and in
the case of mechanical seals, because of the longer delivery times.
Ordering Spare Parts
When ordering spare parts, please supply the following information:
•Type: ________________________ Order no.: ________________________________
•Part designation ______________________ in sectional drawing ________________________
All the information is given on the relevant sectional drawing.
9.2 Stand-by Pumps
It is essential that a sufficient number of stand-by pumps are kept ready for use in
plants where failure of a pump could endanger human life or cause damage to
property or high costs. Regular checks should be carried out to ensure that such
pumps are always ready for use (see Point 6.2).
Please
note
WTS 102/3-en 18

Operating instructions
10. Plant Manager List
Each plant manager should sign below to confirm that he has received,
read and understood these
Operating Instructions. He undertakes to follow the instructions conscientiously. If these
instructions are not followed, the manufacturer's guarantee and liability shall cease to apply.
Name:
Date:
Signature:
WTS 102/3-en 19