Wilo Yonos GIGA2.0-D, Installation And Operating Instructions Manual

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en Electrical connection
134 WILO SE 2022-05
Fig. 18: Example – differential pressure sensor
connection in y-pipe installation
Two single pumps as twin-head pump in Y-piece:
In the example in Fig. 18, the main pump is the left-hand pump in the direction of flow.
Connect the differential pressure sensor to this pump!
The two single pumps must be connected and configured to form a twin-head pump.
See “Operating the pump” [
} 147] section and “Twin-head pump operation” [ } 159]
section.
The measuring points of the differential pressure sensor must be on the suction and
discharge side of the twin-head pump system in the common collector pipe.
6.7 Installation and position of addi-
tional sensors to be connected
Index circuit evaluator – hydraulic index circuit in the system:
As delivered, a differential pressure sensor is installed on the flanges of the pump. Al-
ternatively, a differential pressure sensor can also be installed at the hydraulically most
unfavourable point in the pipe network. The cable connection is connected to one of
the analogue inputs. The differential pressure sensor is configured in the pump menu.
Possible signal types on differential pressure sensors:
ƒ
0 ... 10 V
ƒ
2 ... 10 V
ƒ
0 ... 20 mA
ƒ
4 ... 20 mA
7 Electrical connection
DANGER
Risk of fatal injury due to electrical current!
The use of a thermal overload protection is recommended!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• Electrical connection may only be carried out by a qualified electrician and in ac-
cordance with the applicable regulations!
• Adhere to accident prevention regulations!
• Before beginning work on the product, make sure that the pump and drive are
electrically isolated.
• Make sure that no one can turn on the power supply again before work is com-
pleted.
• Make sure that all energy sources can be isolated and locked. If the pump was
switched off by a safety device, it must be secured against switching back on
again until the error has been remedied.
• Electrical machines must always be earthed. Earthing must be appropriate for the
drive and meet the relevant standards and regulations. Earth terminals and fixa-
tion elements must be suitably dimensioned.
• Connection cables must never touch the piping, pump or motor housing.
• If it is possible for persons to come into contact with the pump or the pumped
fluid, the earthed connection must also be fitted with a residual current circuit
breaker.
• Observe the installation and operating instructions for the accessories!