Commissioning; Safety Rules During Operation - Wilo Sub TWU 3 HS Serie Einbau- Und Betriebsanleitung

COMMISSIONING

10. Auxiliary contact: The following functions are
available, depending on the menu item setting:
• 1 <-> = normal or dual operation
In this setting, the pump can work as an inde-
pendent system or as a double-pump system
together with a second system.
• 2 <- = remote operation
The system is switched on and off via remote
control. This is used, for example, if the pump is
only allowed to start when all the inlet slide valves
are open. The control for the inlet slide valves can
be linked to the auxiliary contact in this case.
• 3 X2 = Pmax2
Makes it possible to enter a second value for the
maximum pressure: "Pmax2". If, for example,
higher pressure is required at the taps for con-
sumers that are only used occasionally, this pres-
sure can be accessed via a switch. If the switch
is open, the "Pmax" value is used. If the switch is
closed, the "Pmax2" value is used.
6.4. Commissioning
The work area of the unit is not a recreation-
al area and is to be kept free of people! No
persons are allowed in the work area during
start-up or operation.
6.4.1. Initial commissioning
The following points must be checked before the
initial start-up:
• The pump was installed and connected correctly.
• Insulation check was carried out.
• The installation and operating parameters on the
frequency converter (for TWU 3-...-HS-ECP) have
been set correctly.
• The system has been vented and flushed.
6.4.2. Venting the pump and unit
• Open all the slide valves in the discharge pipeline.
• Switch the pump on. To bypass the built-in
dry-running protection of the TWU 3-...-HS-
ECP, hold down the "+" button on the frequency
converter. The pump starts pumping at maximum
output.
The air escapes through the corresponding air
vent valves. If you have not installed any air
vent valves, open the taps so that the air can
escape from them.
• Once the pump and pipe system have been vent-
ed, switch the pump off again. To do this with the
TWU 3-...-HS-ECP, press the "ON/OFF" button on
the frequency converter.
6.4.3. Before switch-on
The following points must be checked before
switching on the submersible pump:
• Proper and secure cable routing (e.g. no loops)
• Firm fit for all components (pump, piping, etc.)
• Operating conditions:
• Temperature of the fluid
• Immersion depth
• Ambient temperature when external frequency
converter is used
Installation and operating instructions Wilo-Sub TWU 3/High Speed
• Open all the gate valves in the pressure pipe.
The pump must not be switched off when the
valves are throttled or closed.
6.4.4. Switching on
• Pump with built-in frequency converter
(TWU 3-...-HS-I)
The pump does not have an automatic activa-
tion function and has to be switched on and off
manually using a separate operating point (on/
off switch) provided by the customer. A separate
pressure controller must be installed for automat-
ic operation.
• Pump with external frequency converter
(TWU 3-...-HS-ECP)
The pump is now in standby mode and "Stand-
by" is shown on the display. To switch the pump
on, press the "ON/OFF" button on the frequency
converter. The pump starts and either pumps
water or switches to standby mode, depending
on the operating conditions. When water is drawn
from a tap, the pump starts and provides the
desired water pressure. When no more water is
being drawn, the pump switches back to standby
mode.
6.4.5. After activation
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
pump is switched on, it must be switched off
without delay. The start pauses specified in the
"Technical data" section must be observed before
starting up again. If the fault recurs, the unit must
be switched off again immediately. The pump
should only be restarted once the fault has been
rectified.

6.5. Safety rules during operation

When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec-
trical machinery. To help ensure safe working
practice, the responsibilities of employees should
be clearly specified by the operator. All personnel
are responsible for ensuring that regulations are
observed.
The pump is equipped with moving parts. During
operation, these parts rotate in order to pump the
fluid. Certain substances in the fluid can result in
very sharp edges forming on the moving parts.
WARNING: rotating parts!
The rotating parts can crush and sever limbs.
Never reach into the hydraulics or touch
the rotating parts when the machine is in
operation. Before performing maintenance or
repairs, switch off the pump and wait for the
rotating parts to come to a standstill.
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