Using The Auxiliary Contact (Twu 3; Safety Rules During Operation - Wilo SUB TWU 3 Notice De Montage Et De Mise En Service

English
The pump is now in stand-by mode and
"Stand-by" is shown on the display. To switch
on the pump, press the "ON/OFF" button on the
frequency converter. The pump starts up and,
depending on the operating conditions, will pump
water or switch to stand-by mode. As soon as
water is taken from a tapping point, the pump
starts up and pumps water at the required pres-
sure. As soon as no more water is taken, the pump
switches back to stand-by mode.
6.4.5. After starting up
The rated current is briefly exceeded during the
start-up procedure. Once the start-up procedure
has completed, the operating current may no
longer exceed the rated current.
If the motor does not start immediately after
the unit is switched on, it must be switched off
without delay. The start pauses specified in the
"Technical data" section must be adhered to be-
fore starting up again. If the fault recurs, the unit
must be switched off again immediately. The unit
may only be restarted, once the fault has been
rectified.
6.5. Using the auxiliary contact (TWU 3-...-HS-ECP)
6.5.1. installation of auxiliary contact
Fig. 9.: installation
1 Position of the auxiliary contact
2 Cable connection
The cable connection for the auxiliary contact
is sealed as standard. To insert a cable, you must
unscrew the cap and drill through or pierce the
seal on the cap head.
Overview of the factory and recommended settings for the operating parameters of the TWU 3-...-HS-ECP
Parameter
Pmax
Language
Delta P
Coastdown period
Auto-reset interval
Auto-reset attempts
Max. starts/h
Direction of rotation
Speed of reaction to changes
Minimum frequency
Motor current monitor
Auxiliary contact
44
BEWARE of injuring your hands!
If the cap is not fixed properly, there is an
increased risk of injury when drilling through
or piercing it! Fix the cap so that it cannot slip
away during the work. For your own safety,
also wear protective clothing for your hands!
Fig. 10.: overview of connections
Connection for dual
1
pump operation
Connection for remote
2
operation
For use as a single pump system, the auxiliary
contact must be set to the value "1 <->" and
no cable may be connected to the auxiliary
contact!
BEWARE of short circuits!
A wrong connection on the auxiliary contact
can cause a short circuit. This can irreversibly
damage the frequency converter. Connect
the devices to the auxiliary contact exactly
as shown in the circuit diagram!

6.6. Safety rules during operation

When operating the unit, always follow the locally
applicable laws and regulations for work safety,
accident prevention and handling electrical ma-
chinery. To help to ensure safe working practice,
the responsibilities of employees should be clear-
ly set out by the owner. All personnel are respon-
sible for ensuring that regulations are observed.
The unit has moving parts. During operation,
these parts turn to pump the fluid. Certain ma-
terials in the pumped fluid can cause very sharp
edges to form on the moving parts.
Setting range
Factory
1.5 to 7.5 bar 3.0 bar
IT, EN, FR, DE, ES IT
0.3 to 1.5 bar 0.3 bar
2 to 60 sec 10 seconds
15 to 240 minutes 15 minutes
0 to 15 5
OFF to 50 OFF
---> / <--- --->
10 to 50 25
50 %, 60 %, 70 % 70 %
0.5 to 9.7 A 0.5 A
1 to 3 1
START-UP
Connection for switch
3
for Pmax2
Setting
Recommended
As required
As required
0.5 bar
10 seconds
60 minutes
5
30
As required
40
Installation depth to 10 m = 60 %
Installation depth from 10 m = 70 %
According to name plate
1
WILO SE 12/2012 Ed.03 DIN A4