WilTec 51545 User manual

Operation Manual
Multistage Centrifugal Pump
51545–51547
Illustration similar, may vary depending on model
Read and follow the operating instructions and safety information before using for the first time.
Technical changes reserved!
Due to further developments, illustrations, functioning steps and technical data can differ insignificantly.
Updating the documentation
If you have suggestions for improvement or have found any irregularities, please contact us.

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The information contained in this document may alter at any time without previous notice. It is prohibited
to copy or spread any parts of this document in any way without prior written allowance. All rights re-
served.
The WilTec Wildanger Technik GmbH cannot be held accountable for any possible mistakes in this
operating manual, nor in the diagrams and figures shown.
Even though, the WilTec Wildanger Technik GmbH has undergone biggest possible efforts to ensure
that the operating manual is complete, faultless and up to date, mistakes cannot be entirely avoided.
If you should find a mistake or wish to make a suggestion for improvement, we look forward to hearing
from you.
Send an e-mail to:
[email protected]
or use our contact form:
https://www.wiltec.de/contacts/
The most recent version of this manual in various languages can be found in our online shop via:
https://www.wiltec.de/docsearch
Our postal address is:
WilTec Wildanger Technik GmbH
Königsbenden 12
52249 Eschweiler
Germany
Do you wish to pick goods up? Our pick-up address is:
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler
Germany
To shorten the waiting time and allow for a rapid on-site transaction, we ask you to call us previously or
placing your order via the webshop.
E-mail: [e-mail]
Tel:[phone]
Fax: [phone]
To return orders for exchange, repair or for other purposes, please use the following address. Attention!
To allow for a smooth execution of your complaint or return, it is important to contact our customer
service team before returning the goods.
Returns Department
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler
E-mail: [email protected]o
Tel:[phone]
Fax: [phone]

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Introduction
Thank you for purchasing this quality product. To minimize the risk of injury we urge that our clients
take some basic safety precautions when using this device. Please read the operation instruc-
tions carefully and make sure you have understood its content.
Keep these operation instructions safe.
Safety instructions
The symbols and sentences containing the words “danger” or “warning” enumerate the
consequential risks of the safety instructions not being obeyed.
Symbol
Risk: Not obeying the safety instructions might lead to …
… an electric shock.
… serious harms to your health.
… damage of the pump.
General notes
•Make sure that the installation is correct so that the product may work best.
•All materials have been thoroughly inspected. Correct installation can protect the pump from
being damaged and overloaded. Not disobeying the instructions can lead to damages of the
pump.
Assembly
•The pump must not be immersed in water. Water is sucked in via a hose.
•Install the pump slightly higher than the bottom to prevent dirt from blocking the suction end
when the pump is used to pump very dirty water.
•Never suspend the pump by its electric cables or lines.
•Make sure that there is enough space for the float switch to function flawlessly.
Connecting the outlet tube
It is recommended to install a tube with a diameter larger than the one of the outlet in order to reduce
as much as possible friction losses. Install a non-return valve to the pump intake in order to prevent the
line from emptying whenever the pump is stopped. Avoid that during installation the lines twist or bend
and make sure that the connection at the outlet is correct. In both cases, the flow would be reduced at
the outlet if the connection is bad.
Electric connections
The single-phase motor has been equipped with a thermal protection. Protection of three-phased
should be provided by the user.

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Technical data
Item number
51545
51546
51547
Energy supply
220–240 V / 50 Hz
Power (W)
550
900
2,200
Cable length (m)
1
1
1
Noise level (dB (A))
72
72
78
Pressure (bar)
3.5
5.5
10.5
Rotation speed (giri⁄min)
2,900
2,900
2,850
Max. flow rate (ℓ⁄h)
6,000
7,200
9,000
Max. suction height (m)
9
9
9
Lifting height (m)
35
55
105
Max. temperature (℃)
of pumped liquid
60
60
60
of surroundings
40
40
40
Checks before commissioning
•Make sure that the voltage and frequency correspond to the values stated on the nameplate of
the motor.
•Make sure that the condenser matched the requirements of the pump (single-phase).
•Make sure that the suction via the hose is correct.
•Check the direction of rotation.
•Never let the pump run dry.
•Never change the position of the floating switch as set up by the manufacturer.
Maintenance
Our pumps do not need special maintenance; nevertheless we urge you to obey the following ad-
vice:
•During cold seasons and by low ambient temperature, empty the outlet line.
•If not used for a long time, the pump should be cleaned and stored in a dry place to avoid
corrosion.

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Technical drawing and parts list
№
Name
№
Name
№
Name
1
Impeller
5
Vent cover
9
Pump holder
2
Outlet
6
Holder
10
Mechanical seal
3
Clamping box
7
Rotor system
11
Intake housing
4
Vent
8
Wrapped stator
12
Pressure pin

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Troubleshooting
Problem
Cause
Solution
Motor does not start
a) Power failure
a) Check power supply.
b) Broken safety wire
b) Replace safety wire.
c) Motor overload
c) Check system.
d) Bad connection of starter or bad
assembly
d) Change starter.
e) Bad control circuit
e) Check control circuit.
f) Defective motor
f) Repair.
Device switches off
when the starter is over-
loaded.
a) Broken safety wire
a) Replace safety wire.
b) Overload device error
b) Check starter.
c) Loose cable connection, problem
with power supply
c) Check cable connection and power
supply.
d) Problem with winding
d) Replace motor.
e) Clogged mechanical parts
e) Repair pump.
Only carry out d) and e) after consultation.
The overload device is
suddenly activated.
a) Overload activation too low
a) Reset.
b) Regular power failure
b) Check power supply.
c) Low voltage during current peak.
c) Install voltage stabiliser.
The pump irregularly
discharges the water.
a) Too small inlet pipe
a) Increase inlet pipe.
b) Insufficient amount of water at the
inlet
b) Improve the system, try to increase
the water flow.
c) Too low liquid level
c) Try to increase liquid level.
d) Too low intake pressure compared
to water temperature, pipe bend, and
flow rate
d) Improve system to increase inlet
pressure.
e) Inlet pipe clogged by various com-
ponents
e) Check and clean.
With the pump running,
no water is discharged
a) Inlet pipe clogged by various com-
ponents
a) Check and clean.
b) Bottom or non-return valve closed
b) Check bottom and non-return
valve.
c) Inlet pipe leak
c) Check inlet pipe.
d) Air inside pump or inlet pipe
d) Re-fill liquid, remove air.
Pump runs backwards
with the power supply
switched off.
a) Inlet pipe leak
a) Check inlet pipe.
b) Problem with bottom or non-return
valve
b) Repair bottom or non-return valve.
c) Clogged bottom valve
c) Check valve.
d) Inlet pipe equipped with non-return
valve
d) Check inlet pipe, remove air.

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The pump emits unusual
noises and vibrations
a) Inlet pipe leak
a) Check inlet pipe.
b) Inlet pipe too small or clogged by
particles
b) Improve or repair inlet pipe.
c) Air in the pump or inlet pipe
c) Re-fill liquid, remove air.
d) Too low pump heads of device and
pump
d) Improve system or choose a differ-
ent model.
e) Friction of mechanical parts
e) Repair pump.
Only carry out e) after consultation.

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Disposal regulations
EU guidelines regarding the disposal of scrap electric appliances (WEEE, 2012/19/EU) were imple-
mented in the law related to electrical and electronic equipment and appliances.
All WilTec electric devices that fall under the WEEE regulations are labelled with the crossed-out
wheeled waste bin logo. This logo indicates that this electric equipment must not be disposed with the
domestic waste.
The company WilTec Technik GmbH has been registered in the German registry EAR under the WEEE-
registration number DE45283704.
Disposal of used electrical and electronic appliances
(intended for use in the countries of the European Un-
ion and other European countries with a separate col-
lection system for these appliances).
The logo on the article or on its packaging points out
that this article must not be treated as normal house-
hold waste but must be disposed to a recycling collec-
tion point for electronic and electrical waste equipment.
By contributing to the correct disposal of this article you
protect the environment and the health of your fellow
men. Environment and health are threatened by inap-
propriate disposal.
Material recycling helps reduce the consumption of raw materials.
Additional information on recycling this article can be provided by your local community, municipal waste
disposal facilities or the store where you purchased the article.
Address:
WilTec Wildanger Technik GmbH
Königsbenden 12 / 28
D-52249 Eschweiler
Important notice:
The reprint or reproduction, even of excerpts, and any commercial use, even in part, of this instruction
manual require the written permission of WilTec Wildanger Technik GmbH.