WilTec 50753 - Page 8

© by WilTec Wildanger Technik GmbH Item 50753, 50757, 50758, 50760 Page 8
http://www.WilTec.de
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http://www.teichtip.de
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 (1
st
) LED (alarm) blinks: unit off due to lack of water (protection against dry running) –
press “restart” to start the unit again.
• Middle (2
nd
) LED blinks: pump switched on.
• Lower (3
rd
) 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