WilTec SKD-3 User manual

Operation Manual
Pressure Switch SKD-3
51245, 51248
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
CAUTION:
This device is not intended for use by persons (including children) with limited physical, sensory or
mental abilities or with a lack of experience and/or knowledge, unless they are supervised or instructed
how to use this device by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the device. Cleaning and user mainte-
nance must not be carried out by children.
ATTENTION:
•Perform a visual inspection of the device before each use. Do not use the device if safety de-
vices are damaged or worn. Never disable safety devices.
•Only use the device for the purpose specified in these instructions for use.
•You are responsible for safety in the work area.
•If the cable or plug is damaged due to external influences, the cable must not be repaired, but
must be replaced with a new one. This work may only be carried out by a qualified electrician.
•The voltage of 230 V AC specified on the type plate of the device must correspond to the exist-
ing mains voltage.
•Never lift, transport, or attach the device to the power cord.
•Make sure that the electrical plug connections are protected from flood and moisture.
•Disconnect the mains plug before carrying out any work on the appliance.
•The operator is responsible for compliance with local safety and installation regulations. Ask a
qualified electrician if necessary.
•If the device should fail, repair work may only be carried out by a qualified electrician.
WARNING:
Read all safety instructions and instructions. Failure to follow the safety precautions and instructions
may result in electric shock, fire and/or serious injury.
Keep all safety instructions and instructions for the future.
Stability
•The temperature of the pumped liquid should not exceed +35 ℃in continuous operation.
•No flammable, gas forming, or explosive liquids may be pumped with this pump. This pump
must not be used for other liquids, in particular motor fuels, cleaning agents, and other chemical
products!
Electrical connection
The electrical connection is made at a 230 V ~ 50 Hz socket outlet with grounding contact. Fuse protec-
tion at least 10 A.

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Technical specifications
Input voltage (V)
220–240
Input frequency (㎐)
50
Max. input amperage (A)
10
Max. operating pressure (㍴)
10
Start pressure (㍴)
1.5
Pressure gauge pressure range (㍴)
1–12
Max. temperature (℃)
60
Connections (㎜)
32.89–33.25 (1″) (external thread)
Max. power of connected pump (㎾)
2.2
Protection type
IP 65
Functional description of the general operating mode of the pump control
The pump control consists of a pressure switch and a water flow switch. The switching cycles are then
determined from the two switching states of the pressure switch and the water flow switch.
•Water pressure switch actuated + water flow switch not actuated = normal switch-off (delay of
approx. 3–8 s until switch-off)
•Water pressure switch not actuated + water flow switch actuated = pump on
•Water pressure switch not actuated + water flow switch not actuated = switch-off due to dry
running and indication of fault (delay 8–15 s)
Common causes of errors
1. First case:
The pump control switches off and displays failure/error even though water has been pumped
successfully before. After a reset, this error will reoccur immediately or after a short time.
Possible causes:
a) The water pressure of the pump used is not sufficient to operate the water pressure
switch. (Causes can be a blockage, a worn pump body or a pump that is too weak).
b) The water pressure switch in the pump control is blocked. (Cleaning with clean water
can solve the problem or the housing of the pressure switch in the pump control must
be cleaned. Sand and other sediments may have deposited here.)
2. Second case:
The pump control leaves the pump permanently switched on regardless of whether the tap is
open or closed.
Possible causes:
a) The installation position of the pump control was not taken into account. This does not
reset the water flow switch and it is permanently actuated. (Check installation position
and correct if necessary.)
b) The water flow switch at the pump control input is permanently actuated. This can be
caused by contamination, calcification or a foreign body. (An optical check confirms this
problem and can be corrected by cleaning.)

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Notes on installation
We recommend connecting the pump
control to the house water pipe via a
flexible hose.
Safety valve to pre-
vent water leakage if
the diaphragm
bursts (do not work
on or change!).
The control must be
oriented upwards ac-
cording to the direction
of the arrow.
The controller can be in-
stalled directly on the pump
or between the pump and
the first tapping point.
Before the
start of the ma-
chine, the suc-
tion hose and
pump filling
must be
checked!
Pump pressure
The automat is set to
an inlet pressure of
1.5 bar. The pump inlet
pressure must normally
be 0.5 bar higher than
the starting pressure,
i.e., at least 2 bar.
Do not place any extraction
points between the pump and
switch.
The machine is
equipped with a test
valve to protect the pip-
ing system from pres-
sure loss.
If the water column be-
tween the pump and the
highest point of the pipe
exceeds 15 m, the au-
tomat cannot be in-
stalled directly at the
pump. The machine
must then be installed
at a height where the
overhanging water col-
umn is shorter than
15 m. For example: If
the water column is
20 m, the machine must
be installed at least 5 m
above the pump.

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Wiring diagram for connecting various pump motors to the automatic machines
Wiring diagram for single-phase
220 V pumps up to 1.1 kW
Wiring diagram for single-phase
220 V pumps over 1.1 kW; con-
trol via 2-phase relay (contactor),
relay selection according to
pump performance
Wiring diagram for three-phase
400 V pumps, also over 1.1 kW;
control via 3-phase relay (con-
tactor), selection of relay accord-
ing to pump capacity
Possible errors and their elimination
Error
Error at the machine
Error outside the machine
Pump does not start.
Board is damaged.
•Missing voltage
•Pump defective
•Interchanged cables
Pump does not stop.
•Board is damaged.
•Flow detector is stuck in the upper
position.
•Reset button is blocked.
•Pump does not have sufficient
pressure.
Leak with more than 0.6 ℓ⁄min loss.
Pump operates intermit-
tently.
•Board is damaged.
•Pump does not have sufficient
pressure.
There is a leak with less than
0.6 ℓ⁄min loss.

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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.