Installation and operating instructions Wilo-Sub TWU 3-...-HS (High Speed) 21
COMMISSIONING English
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
vented, 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 switching on
Check the following prior to switching on the
submersible pump:
• Proper and secure cable routing (e.g. no loops)
•
Firm fit of all components (pump, piping, etc.)
•
Operating conditions:
•
Temperature of the fluid
• Immersion depth
• Ambient temperature when external frequency
converter is used
• 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
automatic 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 switching on
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 Conduct during operation
When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling electri-
cal machinery. The operator is obliged to define
the responsibilities of employees to help ensure
safe working practice. All personnel are responsi-
ble 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!
The following must be checked at regular inter-
vals:
•
Operating voltage (permissible dev/- 5 %
of the rated voltage)
•
Frequency (permissible dev/- 2 % of the
rated frequency)
• Current consumption (permissible deviation
between phases is a maximum of 5 %)
• Switching frequency (see technical data)
• Minimum water submersion
•
Quiet and low-vibration running
• Gate valves in the pressure pipe must be open.
6.6
Auxiliary contact (TWU 3-...-HS-ECP)
The frequency converter is prepared for connect-
ing an auxiliary contact, which is factory-set for
use in single or dual pump operation.
Contact Wilo customer service to use other func-
tions of the auxiliary contact.
The associated menu is not enabled by default.
The following functions are available depending
on the menu item setting:
•
1 <->
= normal or dual operation (factory setting)
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.
