WilTec 50753 User manual

Operation Manual
Domestic Waterworks
50753, 50757, 50758, 50760
Illustration similar, may vary depending on model
Please read and follow the operating instructions and safety information prior to initial operation.
Technical changes reserved!
Illustrations, functional steps and technical data may deviate insignificantly due to continuous further
developments.

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The information contained in this document may alter at any time without prior notice. No part of this
document may be copied or otherwise duplicated without prior written consent. All rights reserved.
WilTec Wildanger Technik GmbH cannot be held liable for any possible mistakes in this operating man-
ual, nor in the diagrams and illustrations shown.
Although WilTec Wildanger Technik GmbH has made every possible effort to ensure that this operating
manual is complete, accurate and up-to-date, errors cannot be ruled out entirely.
If you have found an error or wish to suggest an improvement, we look forward to hearing from you.
Send us an e-mail to:
[email protected]
or use our contact form:
https://www.wiltec.de/contacts/
The most recent version of this manual in several languages can be found in our online shop:
https://www.wiltec.de/docsearch
Our postal address is:
WilTec Wildanger Technik GmbH
Königsbenden 12
52249 Eschweiler Germany
Do you wish to collect your goods? Our address for collection is:
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler Germany
In order to shorten the waiting time and to allow for an easy on-site processing, we kindly ask you to
contact us briefly beforehand or to place your order via the webshop.
E-mail: [e-mail]
Phone: [phone]
Fax: [phone]
To return your goods for exchange, repair or other purposes, please use the following address. Atten-
tion! To allow for a trouble-free complaint or return, it is important to contact our customer service team
before returning your goods.
Retourenabteilung
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler Germany
E-mail: [email protected]o
Phone: [phone]
Fax: [phone])

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Introduction
Thank you for choosing to purchase this quality product. To minimise the risk of injury, we ask you to
always take some basic safety precautions when using this product. Please read this operating manual
carefully and make sure that you understand it.
Keep these operation instructions in a safe place.
Safety instructions
CAUTION:
In and near standing water, garden ponds, and swimming ponds, the use of this device is only allowed
with a fault current protection switch with a triggering nominal current up to 30 mA (according to VDE
0100 Article 702 and 738).
The device is not suitable for use in swimming pools, paddling pools of any kind, or waters in which
people or animals may stay during operation. Operation of the device with people or animals being in
the danger area is not permitted. Ask an electrician, if necessary.
The device is not intended for use by persons (including children) with impaired or limited physical,
sensory and mental abilities or lack of experience and/or real knowledge, unless they are supervised by
a person responsible for their safety or follow the instructions made by this person on how to correctly
use the device. Children should be supervised to ensure that they do not play with the device.
ATTENTION:
•Perform a visual inspection of the device before every use. Do not use the device if the safety
appliances are damaged or worn out. Never override safety regulations.
•Only use the device accordingly to the intended purpose stated in this manual.
•You are responsible for the safety of the working zone.
•If the cable or the plug is damaged due to external influences, the cable must not be repaired.
It has to be replaced with a new one. This work can only be carried out by an electrician.
•The voltage of 230 V AC indicated on the nameplate of the device must match the existent
mains voltage.
•Never lift, carry, or fix the device by using the power cable.
•Make sure that the electric plug connections are protected from flood and humidity.
•Before working on the device (maintaining, repairing, cleaning it), pull out the plug.
•Avoid exposing the device to direct jets of water.
•The user is responsible for complying with local safety and mounting regulations. Ask an elec-
trician, if necessary.
•The user must take appropriate measures (e.g., installation of an alarm system, a reserve pump,
etc.) to prevent damage caused by the flooding in case of device malfunctioning.
•In case of device failure, repairs can only be carried out by an electrician.
•The device must never run dry or be operated with its suction line fully closed.
•Do not use this device to operate swimming pools.
•This device must not be integrated into any kind of domestic water circuit meant for potable
water.
WARNING:
Read all safety precautions and instructions. Failure to obey the safety precautions and instructions
might cause an electric shock, a fire, and/or severe injuries. Keep all safety precautions and instructions
for future use.

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Resistance
•The maximum temperature of the pumped liquid should not exceed +35 ℃in continuous oper-
ation.
•The pump must not be used to pump flammable, gassing, or explosive liquids. The transport of
aggressive fluids (acids, bases, etc.) as well as of abrasive substances (e.g., sand) must be
avoided.
•To avoid damage caused by dry running, we strongly recommend our customers to use one of
our automatic pump controls that prevent the pump from running dry.
Intended use and field of application
•For watering green spaces, vegetable patches, and gardens
•For operating lawn sprinklers
•With pre-filter for withdrawing water from ponds, streams, rain barrels, rainwater tanks, and
fountains
Media to be pumped
For pumping clear water (sweet water), rain water, or suds (slightly soiled water)
Operating instructions
We recommend the use of a prefilter and a suction set with suction hose, suction strainer and a check
valve to prolong the suction process and to avoid damaging the pump with stones and foreign bodies.
Technical specifications
Item number
50753
50757
50758
50760
Size (㎜)
360×230×420
365×210×240
440×200×260
Weight (㎏)
8.9
8.8
9.05
Material
Plastic
Stainless steel
Steel
Power supply
230 V~50 Hz
Power consumption (W)
1200
1100
Hose connection (㎜)
31 (1″) IG
30.5 (1″) IG
Length of cable (m)
2×1.2 (⌀1,0)
2
Temperature range (℃)
0–50
0–35
max. 40
Pressure (bar)
4
max. 4.5
Max. flow rate (ℓ⁄h)
3500
4600
Lifting height (m)
50
46
45
Suction height (m)
8
7
Sound level (dB (A))
84
91

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Electrical connection
•The electrical connection is made to an earthed socket 230 V ~ 50 Hz. Fuse min. 10 A.
•The device has an ON/OFF switch with which it is switched on and off. The inner control lamp
of the switch is lit when the motor is switched on.
•The motor is protected from overcharge and blockage with the help of the built-in thermal motor
protection. When overheated, the pump motor is automatically switched off by the thermal pro-
tection; after cooling down, the pump automatically re-starts.
Suction line
•Connect a suction hose (plastic hose min. ¾″ spiral reinforced) directly or with a thread nipple
to the suction connection (1″ internal thread) of the pump.
•The suction which is used should have a suction valve. In case the suction valve cannot be
used, a check valve should be installed in the suction line.
•Position the suction line from the water withdrawal to the pump on a rising gradient. Avoid by all
means placing the suction line higher than the pump height; air pockets in the suction line would
slow down and impede the suction process.
•The suction and the pressure line have to be installed in such a way, that they do not exert any
mechanical pressure on the pump.
•The suction valve should lie deeply enough in the water, so that a drop in the water level cannot
lead to the pump running dry.
•A leaking suction line prevents the suction of water due to air intake.
•Avoid sucking in foreign particles (sand, etc.) and, if necessary, install a prefilter.
Pressure line connection
•The pressure line (should be at least ¾″) must be connected directly or via a thread nipple to
the pressure line connector (1″ internal thread) of the pump.
•With the suitable screw joints a ½″ pressure hose can be used. Correspondingly the pump out-
put is reduced due to the small pressure hose.
•During the suction process the shut-off devices (valves, spray nozzles) in the pressure line must
be completely open so that the air in the suction line can escape freely.
Initial operation
1. Place the device on a level and solid surface the temperature of which does not exceed 40 ℃.
On the installation site, place the pump horizontally so that the bearing can operate correctly.
Screw the pump to the surface.
2. Install the suction line so that it is ready for use. The suction hose should not be narrower than
the suction connection. If the suction height exceeds 4 m, use a suction line with a larger diam-
eter.
3. Connect to mains.
4. Fill in the pump with water at the pressure port.
5. During the suction process, the shut-off devices (valves, spray nozzles) in the pressure line
must be completely open so that the air in the suction line can escape freely.
6. Depending on the suction height and the air quantity in the suction line, the first suction process
can take approx. ½ min–5 min. With longer suction periods of sucking in, new water should be
refilled.
7. If the pump is removed after its use, do not forget that it has to be refilled with water before you
operate the pump again and before restarting and connecting it again.
Maintenance hints
The machine is largely maintenance-free. However, for a long working life and continuous operation,
we recommend regular checking and proper care.

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Attention! Before every maintenance, the pump must be switched off; to do so, disconnect the
pump from the power supply.
•Before a long period of non-use, the pump must be rinsed thoroughly with water, completely
emptied, and stored in a dry environment.
•In case of frost danger, the pump must be completely emptied.
•After long non-operation periods, check if a proper turning of the rotor takes place; to do so,
shortly switch the pump on and off.
•In case the pump is blocked, connect the pressure line to the water line and remove the suction
hose. Open the water line. Switch on the pump for several times for approx. 2 s. Thus, block-
ages can be cleared in most cases.
Malfunctions of the pump
Engine does not run
Cause
Solution
No supply power (voltage)
Check voltage.
Pump impeller blocked –thermo controller has
switched pump off
Dismantle and clean the pump.
Pump does not suck in
Cause
Solution
Suction valve not in the pumped medium
Bring suction valve in the pumped medium.
Pump room without water
Fill in pump medium in suction nozzle.
Air in suction line
Check if suction line is well sealed.
Suction valve leaking
Clean suction valve.
Suction strainer (suction valve) blocked
Clean suction strainer.
Max. suction lift exceeded
Check suction lift.
Insufficient flow rate
Cause
Solution
Suction lift too high
Check suction lift.
Suction strainer dirty
Clean suction strainer.
Water level drops rapidly
Place the suction valve more deeply.
Pump efficiency reduced due to harmful sub-
stances
Clean pump and replace worn parts.
Thermo switch switches off pump
Cause
Solution
Engine overloaded –excessive friction due to
foreign particles
Dismantle and clean pump, prevent sucking-in of
foreign particles (filter).
Attention! The pump must not run dry.

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Exploded view and parts list
№
Name
№
Name
1
Pump housing
17
End cap
2
Vent screw
18
Fan casing
3
Gasket
19
Ball bearing
4
Rotor
20
Washer
5
Screw
21
Fan
6
Rotor
22
Cable inlet
7
Rotating mechanical sealing
23
Screw
8
Fixed mechanical sealing
24
Motor housing
9
Gasket
25
Foot
10
Screw
26
Rotor
11
Motor connection
27
Shaft
12
Bearing
28
Key (block)
13
Connection box
29
Key (block)
14
Capacitor
30
Nut
15
Cable connection
31
O-ring
16
Stator
32
Drain screw and sealing

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Pump control for domestic waterworks
Pressure switch EDWC2001
The pressure switch automatically controls the start and stop of the pump depending on the pressure
drop (opening of the water faucet) and water flow stop (closing the water faucet). The pressure switch
stops the pump if no water is conveyed (protection against dry running).
Technical specifications
Intake voltage (V)
220–250
Frequency (㎐)
50
Max. current (A)
10
Pressure range (bar)
1–4 (58 psi)
Max. pressure (bar)
10
Max. temperature (℃)
55
Connections (㎜)
25.4 internal thread
Protection class
IP 65
Function
•Starts and stops the pump automatically.
•It protects the pump against damage caused by dry running.
•The pressure switch starts the pump for 15 s if it is connected to the voltage source. If the
pressure in the line system drops, the pump is restarted. In the case of conventional systems
with pressure switch and pressure tank, the pump stops running if a certain pressure level is
achieved. In contrast to this, the pressure switch stops depending on the flow rate. In doing so,
it delays switch-off of the pump for a few (7–15) seconds to minimize the number of pump starts.
LED display
•Upper (1st) LED (alarm) blinks: unit off due to lack of water (protection against dry running) –
press “restart”to start the unit again.
•Middle (2nd) LED blinks: pump switched on.
•Lower (3rd) LED blinks: switch has voltage.
•Restart (reset) button: restart unit.
Troubleshooting
Problem
Dysfunction of the unit
Other dysfunction
Pump does not start
Circuit board damaged
Missing voltage
Pump defect
Mixed-up electric cables
Dry running display de-
spite water
Set pressure too high (adjust pressure
setting screw until the red alarm-LED is
off, if pump stops)
Pump does not stop
Circuit board damaged

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Flow detector trapped in the upper posi-
tion
There is a leak with a loss superior
to 0,6 ℓ⁄min.
Reset-button blocked
Pump has not enough pressure
Pump runs intermittently
(pump starts and stops
constantly)
Circuit board damaged
There is a leak with a loss inferior to
0,6 ℓ⁄min.
Pump has not enough pressure

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Regulations for waste disposal
The Waste Electrical and Electronic Equipment Directive (WEEE Directive, 2012/19/EU) of the EU was
implemented in the German law related to electrical and electronic equipment and appliances.
All WilTec electric devices that fall under the WEEE directive are labelled with the symbol of a crossed-
out wheeled rubbish bin. This symbol indicates that this electric device must not be disposed of with the
domestic waste.
WilTec Technik GmbH is registered with the German registration authority EAR (Stiftung Elektro-
Altgeräte Register) under the WEEE-registration number DE45283704.
Disposal of used electrical and electronic devices (in-
tended for use in the countries of the European Union
and other European countries with a separate waste
collection system for these devices).
The symbol on the packaging or the product itself indi-
cates that this product must not be treated as normal
domestic waste but must be disposed of at a recycling
collection station for electrical and electronic waste.
By disposing of this product correctly, you contribute to
the protection of the environment and the health of your
fellow people. Inappropriate disposal threatens the en-
vironment and health.
Material recycling helps to reduce the consumption of raw materials.
Additional information about the recycling of this product can be provided by your local commune, the
municipal waste disposal facilities, or the store where you purchased the product.
Address:
WilTec Wildanger Technik GmbH
Königsbenden 12 / 28
52249 Eschweiler Germany
Important Note:
Reproduction and any commercial use (of parts) of this operating manual, requires a written permission
of WilTec Wildanger Technik GmbH.