FLUVO WK User manual

Operator’s Manual
D
GB
27220-B.2
Centrifugal pump type WK

EG-Konformitätserklärung
Déclaration de conformité pour la CEE / EC-Declaration of Conformity /
CEE-Certificado de Conformidad / Dichiarazione CE di conformità
Hersteller / fabricant / manufacturer / fabricantee / fabrikant
Schmalenberger GmbH+Co KG
Strömungstechnologie
Im Schelmen 9-11
D-72072 Tübingen / Germany
Produkt / produit / product / producto / prodotto
Kreiselpumpen / Pompes centrifuges / Circulating pumps / Bombas centrifugas / Pompe centrifughe
Typ / modèle / model / modelo / tipo
WK, WK-Vario
Hiermit erklären wir, dass die spezifische Bauart in Übereinstimmung mit den folgenden Richtlinien hergestellt worden ist:
Par la présente, nous declarons, que le type de est produit conforme aux dispositions des directives européenne sci après:
We hereby declare that the specific type has been produced in accordance with the following standards:
Por la presente les confirmamos que lo abajo especificado ha sido fabrico en conformidad con las siguientes normas:
Si dichiara che il modello della è stato in conformità alle sequenti norme:
EG - Richtlinien / Directives de la CEE / EEC Directives / Normativas de la CEE / Direttive CEE
• 2006/42/EG
• 2006/95/EG
• 2004/108/EG
Zur sachgerechten Umsetzung der in der EG-Richtlinie genannten Sicherheits- und Gesundheitsanforderungen wurde(n) fol-
gende Norm(en) herangezogen:
Pour mettre en partique dans les règles de l'art les prescritions en matière de sécurité et de santé stipulées dans les Directives
de la CEE, il a été tenu compte de la /des norme(s):
For the relevant implementation of the safety and health requirements mentioned in the Directives, the following standard(s)
must be required:
Con el fin de realizar de forma adecuada las exigencias referentes a la seguridad y a la snidad mencionadas en las norma-
tivas de la CEE fuè(ron) consultada(s) la(s) siguiente(s) normativa(s):
Per la verifica della Conformità di cui alle Direttive sopra menzionate, sono state consultate le seguenti, norme Armonizzate
EN:
Harmonisierte Normen / Normes harmonisées / Harmonised Standards / Normas armonizadas / Norme armonizzate
EN ISO 12100-1, EN ISO 12100-2, EN 61000-6-2, EN 61000-6-3, EN 809, EN ISO 14121-1
Tübingen, den 21. Dezember 2009
-------------------------------------------------------------------------------------------------
Leiter Qualitätssicherung / Directeur d’assurance de la qualité /
Manager of quality assurance / Director del assegunamiento de qalidad /
Direzione qualità / Tel. [phone]
2
Pumpe Typ WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany

TABLE OF CONTENTS
3Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
Table of Contents
1 General Information ......................................................................... 4
1.1 User Information ............................................................................................................. 4
1.2 Usage Instructions ......................................................................................................... 4
1.3 Other Applicable Documents .......................................................................................... 4
1.4 Technical Data / Specification ........................................................................................ 5
1.5 Data Sheet...................................................................................................................... 5
2 Safety Instructions ........................................................................... 6
2.1 General Information ......................................................................................................... 6
2.2 Signs and Symbols ......................................................................................................... 6
2.3 Responsibilities of the Operator....................................................................................... 6
2.4 Safety Instructions for Installation.................................................................................... 6
2.5 Safety Instructions for Connection and Commissioning .................................................. 7
2.6 Safety Instructions for Maintenance and Repair.............................................................. 7
2.7 Description of the Device ............................................................................................... 7
3 Transport, Storage and Assembly ................................................... 8
3.1 Transport and Storage.................................................................................................... 8
3.2 Unpacking, Cleaning and Assembly ............................................................................... 9
3.3 Setting up and Connecting ........................................................................................... 10
4 Electrical Connection...................................................................... 11
4.1 Electrical Connection - General .................................................................................... 11
4.2 Electrical Connection - Pump Type WK........................................................................ 11
5 Device Units ..................................................................................... 13
5.1 Pump Kit Type WK ....................................................................................................... 13
6 Assembly.......................................................................................... 14
6.1 Assembly - General ...................................................................................................... 14
6.2 Assembly of the Control Box (Type WK Only).............................................................. 14
6.3 Assembly of WK-Vario.................................................................................................. 15
6.4 Flow Losses - Pipes and Elements............................................................................... 16
7 Operating the Centrifugal Pump .................................................... 17
7.1 Initial Start-up................................................................................................................ 17
7.2 Operation ...................................................................................................................... 17
7.3 Notices of Incorrect Operation ...................................................................................... 18
7.4 Shutdown...................................................................................................................... 18
7.5 Emptying the Pump ...................................................................................................... 19
8 Troubleshooting .............................................................................. 19
9 Maintenance / Repair....................................................................... 20
9.1 General Information ..................................................................................................... 20
9.2 Maintenance / Inspection.............................................................................................. 20
9.3 Repair ........................................................................................................................... 20
9.4 Disassembly / Dismantling the Pump ........................................................................... 21
10 Appendix .......................................................................................... 22
10.1 Decommissioning / Placing in Storage / Preservation .................................................. 22
10.2 Disposal ....................................................................................................................... 23
10.3 Important Information ................................................................................................... 23
11 Spare Parts List and Drawing..........................................................24
11.1 Type WK ........................................................................................................................ 24
11.2 Type WK-Vario .............................................................................................................. 25
11.3 Spare Parts List ...................................................................................................... 26.27

4 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
1 General Information
1.1 User Information
The Operator's Manual makes it easier to make full use of the device and its range of
options. It contains important information for operating the centrifugal pump safely,
properly and economically. Observing the instructions helps to avoid dangers, avoid repair
costs and downtimes, and increase the reliability and service life of the centrifugal pump.
The Operator's Manual does not take into consideration requirements for specific location.
The operator is responsible for observing these requirements. The pump rating plate
indicates the series and frame size, the most important operating data and the factory
number.
Please specify this information if you have questions, a subsequent order, or
especially when ordering spare parts.
1.2 Proper Use
The pump is intended exclusively for use in accordance with the original specification. It
must only be operated with the values defined in the Technical Documentation regarding
pumping medium, pumping flow, speed, density, pressure, temperature, motor power and
all other data defined in the specification.
Do not use the pump for any other type of application. Do not make any changes to the
pump. This may result in additional risks and property damage,
for which the manufacturer shall not be liable!
The manufacturer must always be consulted regarding adjustments for a new intended
use. We will be pleased to determine what adjustments would be required for the new
intended use.
Proper use also includes observing the Operator's Manual.
Residual risk
The centrifugal pump system is built according to the state of the art and recognised safety
engineering rules. Nevertheless, danger to life and limb of the operator or third parties, or
damage to other property may arise during use. The owner / operator must therefore take
care to heed the safety instructions in this Operator's Manual.
1.3 Other Applicable Documents
Each centrifugal pump has various documents which belong together with the Technical
Documentation for the centrifugal pump. They are:
• The Operator's Manual for the centrifugal pump
• The Operator's Manual for the drive
• The Operator's Manual for the accessories listed in the specification
• Acceptance reports from TÜV, etc.
• Test run report / performance run report
• Assembly drawing (dimension sheet)
• Declaration of Conformity / Manufacturer’s Declaration
• Specification with all information
Not all the documents named above exist or are included in every case. Observe the
information in the specification in this regard.

5Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
1.4 Technical Data / Specification
The specification of the delivered centrifugal pump is the most important document for every Operator's Manual. It contains a
summary of all factual and technical data for the centrifugal pump. It is the centrifugal pump's "birth certificate" and must be treated
as such.
The confirmation of order together with the delivery slip can be used as a replacement as proof of technical data.
See data sheet
1.5 Data Sheet for the WK Pump
Limit values
of the pump
Rated values of motor
Type
1) Alternating current
Q max P max
Output Freque
ncy
Voltage Nominal
current
Speed Weight Sound
level
Pump connection
[m³/h] [bar] [kW] [Hz] [V] [A] [min-1][kg] [dB (A)]
Suction end Pressure end
WK 6013/2 - 0.75
WKN 6013/2 - 0.75
241.00.7550400Y/230∆1,62 28401865+2DN65/G2½“DN50/G2"
WK 6013/2 - 1.5
WKN 6013/2 - 1.5
42 1.2 1.5 50 400Y/230∆2,86 284022 65+2DN65/G2½“DN50/G2"
WK 6013/2 - 1.5 WS1)
WKN 6013/2 - 1.5 WS1)
421.21.5502309.5(230V) 179022 65+2DN65/G2½“DN50/G2"
WK 6013/2 - 1.9
WKN 6013/2 - 1.9
48 1.4 1.9 50 400Y/230∆3,628502367+2DN65/G2½“DN50/G2"
WK 6013/2 - 1.9 WS1)
WKN 6013/2 - 1.9 WS1)
481.41.95023011.5 (230V) 28202367+2DN65/G2½“DN50/G2"
WK 6013/2 - 3.0
WKN 6013/2 - 3.0
60 1.9 3.0 50 400Y/230∆5,7528103570+2DN65/G2½“DN50/G2"
WK 6013/2 - 4.0
WKN 6013/2 - 4.0
96 2.0 4.0 50 690Y/400∆7,6 28603671+2DN80/G3"DN65/G2½“

6 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
2 Safety Instructions
2.1 General Information
• Make certain before commissioning that the operating personnel have read and
understood the Operator's Manual. It is the owner rather than the operator who is
responsible for safety!
• Make certain the safety requirements and laws for the use of pumps which apply to the
operating company and/or country in which the system is operated are observed.
• All parts that come in contact with medium are resistant up to a salt content of 0.75%
(4500 mg/l Cl¯ ). If higher concentrations of salt are present, please contact the
manufacturer.
• Use the pump only when it is in flawless condition technically and according to its
intended purpose. Be conscious of safety and dangers and observe all the instructions
of this Operator’s Manual!
• Eliminate all malfunctions that could have a detrimental effect on safety immediately.
2.2 Signs and Symbols
We warn you of sources of danger in this Operator's Manual through corresponding
notices. The use of symbols is designed to direct your attention at these notices.
Notices placed directly on the pump, such as the arrow for direction of rotation, must
always be observed and must be maintained in legible condition.
2.3 Responsibilities of the Operator
• The owner/operator must take care to ensure
- that the Operator’s Manual is always available for operating personnel
- That the safety instructions in this Operator's Manual are observed
2.4 Safety Instructions for Installation
• The centrifugal pump is delivered without a contact safety device. The required contact
safety device (for example when pumping hot liquids above 60°C) must be provided by
the system manufacturer when the pump is installed in the system.
• If the pump is installed in a shaft, the shaft must have sufficient ventilation (motor
cooling) and an adequate possibility for leakage water to flow off (at least DN 40).
• There must not be any conducting connection between the metallic components of the
motor and a liquid.
2.5 Safety Instructions for Connection and Commissioning
• Electrical equipment must only be installed and serviced by qualified personnel in
Caution! Risk of injury! / Risk of damage!
This symbol warns you of dangers due to mechanical effects.
Caution! Danger of death!
This symbol warns you of dangers due to electrical current.

7Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
accordance with VDE 0105 and IEC 364.
• The pump must only be operated with an FI circuit-breaker.
• The information on the nameplate and the conditions for electrical connection must
match.
• Before turning on the pump or placing it in operation, make certain no one can be
endangered by the pump starting up!
2.6 Safety Instructions for Maintenance and Repair
• Only persons with training as a mechanic and corresponding knowledge are permitted
to perform maintenance and repair work on the pump.
• If liquids are pumped that can cause effects detrimental to health in any way, suitable
measures must be taken (rinsing, cleaning, washing) to bring the wetted surfaces of
the pump to a condition to ensure handling does not entail any dangers.
Tasks that are not described in this Operator's Manual are reserved for the
manufacturer's service personnel.
2.7 Description of the Device
• The pump meets the requirements of VDE regulations.
• The electric motor and plastic pump through which water flows are electrically
separated.
• The electric motor corresponds to protection type IP 54/55.
• The centrifugal pump overall corresponds to protection rating I.
Potential danger zones of the centrifugal pump are:
• The suction connection (strong suction effect)
• The pressure connection (high discharge speed of objects that may have been sucked
in)
• The pump housing (heating)
Caution! Electrical shock!
Turn off the mains power voltage before starting work!
Protect against unauthorised switching on!
the centrifugal pump must be stopped immediately if any abnormal electrical
voltages, vibrations, temperatures, noises, leaks, or other faults occur.

8 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
3 Transport, Storage and Assembly
3.1 Transport and Storage
3.1.1 Transport
Centrifugal pumps must be transported lying down.
The lifting lugs on the motor are only designed for the weight of the motor alone. A unit
consisting of a motor and a pump must be attached on both the motor and pump sides.
If necessary, the position of the centre of gravity is identified on the pump unit itself and on
the packaging and the positions for inserting lifting equipment are marked.
3.1.2 Storage
• Temporary storage
Even for temporary storage of short duration, store in a dry, well ventilated location free
of vibration on wooden supports at a temperature that is as constant as possible.
• Unsuitable storage
If storage conditions are unsuitable (for example high relative humidity), or if the pump
will be in storage for longer than 6 weeks, the pump housing must be filled with oil (see
chapter 3.1.3 Preservation).
• Storage for extended duration
If the storage time exceeds 2 years, the roller bearings in the motor must be regreased
or completely replaced. Before initial commissioning and after an extended down time,
or after installation of a new mechanical seal, always check for smooth operation (see
chapter 10.1.3 Recommissioning).
3.1.3 Preservation
The centrifugal pumps we deliver are provided with preservation according to the storage
time specified by the manufacturer. This preservation must be removed before
commissioning; see chapter 3.2.2 Cleaning.
If the pump will be taken out of operation for an extended time or if the storage time
Fig. 1 Example of slinging for lifting
Caution! Risk of injury!
Use only suitable lifting equipment and
load holding devices which are in perfect
working order and have adequate load-
bearing capacity!
Never work or stand under suspended
loads.
8118

9Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
originally planned before commissioning will be considerably exceeded, preservation
should be performed as corrosion protection. The procedure to follow is described in detail
in chapter 10.1 Decommissioning / Placing in Storage / Preservation.
3.2 Unpacking, Cleaning and Assembly
3.2.1 Unpacking
The centrifugal pump is secured on a pallet with bands for transport. For transport over
extended distances it is packed in cases or crates. After the retaining bands are loosened,
lift the centrifugal pump out of the packaging with auxiliary equipment (lifting tackle). Follow
the instructions in chapter 3.1.1 Transport.
3.2.2 Cleaning
Various measures are provided for protection against transport damage or corrosion. Find
out which ones have been selected for your centrifugal pump.
1. Cover plates on the connections
2. Shaft protection, for delivery without motor
3. Protective paint on bare metal parts
Before set-up or installation of the centrifugal pump, these protective devices must be
removed. No contamination can be allowed to remain inside the pump!
Important:
Depending on the pumping medium, the inside of the pump must be cleaned of oil residue.
Use a cleaning agent to do this that will not damage the mechanical seal or the pump
material. Make certain the pump is carefully dried after cleaning. Suitable cleaning agents
include rectified spirits, Ritzol 155 or suds with a high alkaline content. If steam cleaners
are used, allow the solvent to act first.
If possible do not use steam cleaners. If you do, make certain not to damage the electric
motor and bearings during use.
3.2.3 Assembly
The centrifugal pump generally comes premounted and is therefore ready for delivery.
In special cases the centrifugal pump is delivered without a drive motor. Connect the drive
to the centrifugal pump before the pump is mounted in the system.
Other external accessories such as air chambers, etc., that are not premounted on the
centrifugal pump in the factory should not be connected until after the centrifugal pump is
installed in the system or on the pump foundation.
Note:
Check to ensure the centrifugal pump is running easily and freely before
starting assembly

10 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
3.3 Setting up and Connecting
3.3.1 Before starting to set up, check the following:
• Is the machine / system / container connection prepared according to the dimensions
of the dimension sheet / installation diagram?
• Do the concrete foundations have sufficient concrete strength (min. B 15) per DIN
1045?
• Is the concrete foundation hardened?
• Is the surface horizontal and even?
3.3.2 Installation and Set-up of the Pump
Except for the special design, pumps are always placed on a base plate with the pump or
motor mount and fastened with bolts.
For assembly on a foundation, the centrifugal pump must be aligned with a spirit level.
3.3.3 Connecting the Pipelines
No forces or moments (for example caused by warping or heat expansion) from the
pipelines may be allowed to affect the centrifugal pump.
Pipes must be intercepted directly before the pump and connected with no tension. Their
weight must not place any load on the pump.
The alignment must be made very carefully, since it is the precondition for problem-free
operation of the unit.
Failure to observe these instructions shall cause all claims under the warranty to be
voided.
• If pipeline forces are exceeded, points with faulty seals may develop on the centrifugal
pump itself or on the flanges, which may result in powerful ejection of pumping medium.
• For short pipelines, the nominal widths should at least match those of the pump
connections. For longer pipelines, determine the most cost-effective nominal width
from case to case.
Caution! Risk of injury - stability
Pump with large drives that are installed vertically are top-heavy. These pumps
must be secured against tipping during assembly or disassembly, for example
by using retaining ropes.
Caution!
The centrifugal pump must never under any circumstances be used as a point
for securing the pipeline.
Caution!
With hot, corrosive and toxic pumping media!

11Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
• Transition pieces to larger nominal widths should be designed with an expansion angle
of about 8°to prevent increased pressure loss.
• The suction line rises continuously to the centrifugal pump. For drain, lay pipelines
continuously falling to prevent air lock from forming. Depending on the type of system
and pump, installation of backflow prevention valves and shut-off elements is
recommended.
• Expansion of pipelines due to temperature must be countered by suitable measures.
We recommend installing compensators directly between the pump and the
pipeline.
4 Electrical Connection
4.1 Electrical Connection - General
Connection tasks must only be performed by a certified installation electrician. Applicable
DIN VDE requirementsmust be observed.
Compare the existing mains power supply with the information on the factory plate of the
motor and select a suitable circuit.
We recommend using a motor protection device.
4.2 Electrical Connection - Pump Type WK
Connect the motor according to the circuit diagram in the terminal box or the "Delta
connection" or "Star connection" image.
Make certain:
• The mains power connection must only be made via a fixed connection.
• There must be no conducting connection from metal components of the motor to the
water.
• The mains supply line must be equipped with a fault current circuit breaker (rated
current error ≤30 mA) and an all-pole separator with a contact opening of 3 mm.
• Equipotential bonding with a cross-section of 10 mm² must be applied on the
connection terminal so identified (on the motor mount or next to the terminal box).
• The pump must only be operated with the terminal box cover closed!
Danger of explosion!
If there is danger of explosion, a motor protection device must be installed!

12 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
4.2.1 Connection Diagrams for Three-Phase Motors
4.2.2 Time Relay Setting
For three-phase motors with star-delta connection, you must ensure that the switching
points between star and delta follow one after the other in as little time as possible. Longer
switching times will result in damage to the motor. Time delay setting for star-delta
connection: < 3 sec.
4.2.3 Direction of Rotation Check
The direction of rotation of the motor must match the direction indicated by the direction of
rotation arrow on the spiral housing of the side channel compactor. Check by switching on
and off in quick succession. If the direction of rotation is incorrect, reverse any two phases
L1, L2 or L3 of the mains power supply line in the motor terminal box.
4.2.4 Auxiliary Equipment for Motor
If special control devices are provided, for example in conjunction with use of the
centrifugal pump in a technical system, the manufacturer's instructions for these control
devices must always be observed.
Fig. 2 Delta connection ∆Fig. 3 Star connection Y
(low voltage) (high voltage)
For additional information, see the Operator's Manual
Pump Control (27122).
8042
8043

13Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
5 Device Units
5.1 Pump Kit Type WK
Fig. 4 Pump kit
The pump kit consists of:
1. Pump unit item 01*
2. Suction hose item 16**
3. Pressure hose item 13**
4. Switching tube ø 4 mm item 31**
5. Control box item 02**
6. Cable protection cover item K**
* The item numbers correspond to the numbering
in the spare parts list
** If included in the scope of delivery
The pump kit is always the same
regardless of the type of pool.
The control box (02) must always be positioned above the water level of
the pool!
When setting up the pump, there must be sufficient ventilation (motor cooling)
and an adequate possibility for leakage water to flow off !
8127

14 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
6 Assembly
6.1 Assembly - General
6.2 Assembly of the Control Box
Fig. 5
A = min. 100 mm
b = 160 mm
I Insulation
44 Screw
Mount the base frame in the place
provided for it. Fasten the base frame in
place with 4 screws (44).
Caution!
The base frame should be fastened so
that it is insulated against the floor and
wall (I) to prevent transfer of external
voltage.
Fig. 6
K Protection cover
02 Control box
31 Switching tube
Mount the control box (02) as close as
possible to the installation kit. Connect
the switching tube (31) onto the nipple in
the protection cover (K).
Caution:
Do not kink the switching tube and keep
it as short as possible; maximum length 8
m.
A
8131
8132

15Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
6.3 Assembly of WK-Vario
6.3.1 Combination with Massage Jets
6.3.2 Combination with Water Curtain
Zur hydro-massage >
Zur hydro-massage >
Zur hydro-massage >
Rohr DN 50
WK Pumpe WKvario
Luftregler
Wasserregler
Zur GSA
Ansaugung
Fig. 7
Zur Schwalldusche > Rohr DN 50
Zur GSA
Ansaugung
Rückschlagventil
Luftregler
Wasserregler
WK Pumpe WKvario
Fig. 8

16 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
6.4 Flow Losses - Pipes and Elements
Water, 48 m³/h; turbulent flow; roughness value: 0.1 mm
Flow losses in the pipeline must be noted. Flow losses must be kept low in the components
that are used.
Sample flow values are listed in Fig. 9.
Pipe, 30 m, PVC hard,
DIN 19532
Pressure loss Flow
speed
DN 80 0.263 bar 2.562 m/s
DN 100 0.095 bar 1.718 m/s
DN 150 0.014 bar 0.812 m/s
DN 80 Pressure loss Flow
speed
Knee piece 45° 0.015 bar 2.562 m/s
90-degree elbow 0.006 bar 2.562 m/s
DN 80 Pressure loss Flow
speed
Abrupt pipeline
constriction 80 to 50 mm
0.278 bar 2.562 m/s
Edged run-in under
angle
0.027 bar 2.562 m/s
Fig. 9

17Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
7 Operating the Centrifugal Pump
7.1 Initial Commissioning
1. The centrifugal pump is connected electrically with all protective devices in accordance
with requirements.
2. The centrifugal pump is completely filled with pumping medium and is receiving supply.
3. All shut-off elements are open on the suction end and the pump as well as the suction
line are emptied.
Make certain: Dry running results in increased wear and damage to the pump!
4. Rotating parts of the centrifugal pump must be provided with a contact safety device.
(In accordance with the accident prevention requirements (UVV) the pump may only be
operated with a contact safety device.)
5. The shaft of the centrifugal pump has been tested to ensure it runs easily (observe the
instructions in chapter 3.2.3 Assembly).
6. The direction of motion has been checked.
7.1.1 Starting the Pump
The pump must only be turned on with the pressure-end shut-off element half open and
the suction-end shut-off element completely open! Do not open it until full speed is
reached. Then slowly open it and adjust control to the operating point.
7.2 Operation
7.2.1 Operation Monitoring
In most cases the centrifugal pump is controlled from the central control unit of the entire
system. Data associated with the design of the centrifugal pump and related to the
intended purpose (see specification) must be observed as a precondition for problem-free
functionality.
It is especially important to observe the points listed below during manual operation
of the pump:
1. Temperature of the pumping liquid
The centrifugal pump must only be operated at water temperatures of t = 0 to +50°C.
2. Temperature of the motor cooling air
The maximum temperature of the motor cooling air is 40°C. If higher temperatures
occur (for example in a pump shaft), sufficient ventilation must be ensured.
3. Switching frequency
To avoid large temperature increases in the motor and excessive load on the
centrifugal pump, motor and bearings, one switching-on process per minute must not
be exceeded.
Make certain the following preconditions are met before initial commissioning
of the pump:

18 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
4. Minimum quantity
If the nature of the system includes the possibility of running against the shut-off
element closed on the pressure end, a minimum flow of 2 m³/h with t = 0 to +50°C must
be provided to exclude excessive heating up of the pump hydraulics (for example a
bypass).
5. Density of the pumping liquid
The power consumption of the pump varies proportionally to the density of the pumping
medium. To avoid overload on the motor, the density must match the specification data
of the pump.
7.3 Notices of Incorrect Operation
Avoid damage to the centrifugal pump and make certain that:
• the pump always runs quietly and without vibration
• the pump does not run dry
• extended operation against a closed shut-off element is avoided to prevent the
pumping medium from heating up. For the required minimum pumping quantity, see
chapter 7.2.1 Operation Monitoring.
• the maximum permissible room temperature of +40°C is not exceeded
• The ball bearing temperature does not exceed +50°C above room temperature, or in
any case +90°C (measured on the outside of the motor housing)
• when the centrifugal pump is in operation the shut-off element is not closed in the
supply line
Chapter 8 Troubleshooting contains a table with the most frequent flow faults, their
causes and recommendations for eliminating them.
7.4 Shutdown
1. Close the shut-off element in the pressure line. If a backflow prevention valve is
installed in the pressure line, the shut-off element can remain open provided a counter
pressure is present.
2. Turn off the motor. Make certain run-out is quiet. Depending on the system, when the
heat source (if present) is turned off, the pump should have sufficient coast-down until
the pumping medium temperature is reduced enough so that heat backup in the pump
is avoided.
3. Close the shut-off element in the pressure line.
Caution! Risk of damage!
If there is danger of freezing and/or for extended periods of standstill, the pump
must be emptied and/or protected against being emptied or freezing (auxiliary
heating).

19Pump type WK
Version: 27220 - B Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
7.5 Emptying the Pump
8 Troubleshooting for Type WK
For troubleshooting with type WKN, see the Pump Control Operator's Manual
(27122)
Fig. 10
07 O-ring
11 Plug screw
To let the water out of the centrifugal
pump, open the plug screw (11).
Make certain all the water runs out!
Empty the pipe system leading to the
centrifugal pump as well.
Then screw the plug screw (11) back in
with a new O-ring (07).
Caution!
If faults occur, turn off the centrifugal pump immediately!
All repairs and interventions must be done in accordance with accident
prevention requirements (UVV) and must be performed by qualified
specialists.
Malfunction Possible reason Remedy
1. Pump runs very loud and
produces little output
Wrong direction of rotation for the
motor
Reverse the polarity of the motor in
the terminal box, thereby switching
the direction of rotation
Motor fan scrapes against the fan
hood
Correctly secure the fan hood
2. Pump starts up slowly and only
with difficulty
A current-conducting phase is
missing
Check the supply lines and fuses
3. The fuses are blown immediately
at power-up
Wrong fuses or fast acting fuses Install delayed fuses with the correct
amperage rating
4. Motor protection switch is
triggered
Wrong setting Set the correct current value +10%
(see Data Sheet p. 5)
5. The centrifugal pump cannot be
turned on from the swimming pool
- The switching tube is kinked
- Fuses / power supply
- Motor protection switch
- Switching tube is too long
- Water in the switching tube
Check whether the pump can be
switched from the control box. -
Eliminate possible causes as
explained in chapters 2.3 and 3.
- Shorten the switching tube if
possible and blow through it from the
pool
6. Air valve has a leak Dirty During operation, unscrew the air
valve and replace if necessary
Note: The air valve must be
positioned above the water level.
8135

20 Pump type WK
Version: 27220 - B
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
9 Maintenance / Repair
9.1 General Information
The operator must ensure that all inspection, maintenance and repair work on the pump
are performed only by authorised and specially trained personnel. The operator must
ensure that personnel is sufficiently informed through thorough study of the Operator's
Manual.
We recommend creating and following a maintenance plan. This will help you to avoid
costly repairs and achieve problem-free and reliable operation of the pump.
Only original spare parts may be used for repairs. This applies especially to the mechanical
seal.
When working on the motor, the instructions of the relevant motor manufacturer and
instructions must be followed.
9.2 Maintenance / Inspection
The following information should be used to create a maintenance plan. It consists of
minimum recommendations that must be adjusted and if necessary supplemented as
required by local specific details of the actual installation site.
9.2.1 Lubrication and Change of Lubricant
Pumps of type WK / WKN in standard design have bearings only in the drive motor. The
bearings are designed to last for life and have permanent grease lubrication that cannot be
relubricated. Faulty bearings must be replaced.
9.3 Repair
9.3.1 General Information
Servicing work must be performed on the centrifugal pump only after removal and in a
suitable workshop. Observe all general instructions at the beginning of this chapter!
These instructions will allow you to disassemble the pump and reassemble it properly with
Caution! Danger of death!
Normally work on terminal boxes and on the machine control box must only be
performed with the electrical connections unclamped. Secure the pump unit
against being turned on unintentionally (isolate it).
Continuous checks Daily checks Check/replacement every 6
months
Pumping data for the pump
(pressure, quantity)
Pump running = quiet with no
vibration
Check if screws are tight
Current consumption Storage temperature
Mechanical seal leakage
Note:
The mechanical seal must be inspected as part of a system overhaul after
8000 operating hours. If the mechanical seal is removed during the system
overhaul, it must be replaced by a new one.