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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.01/2022-06
17
P
Fig. 7:
Fig. 7: Example differential pressure sensor connection in common collector pipe.
Two single pumps as double pump in common collector pipe:
In the example in Fig. 7, the main pump is the left-hand pump in the direction of flow. Con-
nect the pressure sensor to this pump! Connect and configure the two single pumps to form
a double pump. See chapter "double pump operation".
The measuring points of the pressure sensor must be on the suction and discharge side of
the double-pump system in the common collector pipe.
6.7
Installation and position of addi-
tional sensors to be connected
In the following cases, sensor sleeves must be installed in the pipes for the admission of
different sensors:
•
Pressure sensors
•
Other sensors
Pressure sensors:
In p-c control mode, the measuring points of the relative pressure sensor should be in-
stalled on discharge pump side. The cable connection should be connected to analogue in-
put 1.
In dp-c or dp-v control mode, the measuring points of the differential pressure sensor
should be on the suction and discharge pump side. The cable connection should be con-
nected to analogue input 1.
The pressure sensor should be configured in the pump menu.
Possible sensor types on suction side:
•
Absolute
•
Relative
Possible sensor types on Discharge side:
•
Relative
Possible signal types on pressure sensors:
•
0 ... 10 V
•
2 ... 10 V
•
0 ... 20mA
•
4 ... 20mA
NOTICE
Available as an accessory:
Absolute, relative or differential pressure sensor for connection to the
pump
Other sensors
In PID control mode, it’s possible to connect other sensor types (Temperature sensor, Flow
sensor, …) compatible with these signal types:
•
0 ... 10 V
•
2 ... 10 V
•
0 ... 20mA
•
4 ... 20mA
The cable connection should be connected to analogue input 1.
