Installation And Position Of Additional Sensors To Be Connected - Wilo Stratos GIGA2.0-I Notice De Montage Et De Mise En Service

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Fig. 17: Example – differential pressure sensor
connection in y-pipe installation
6.7 Installation and position of addi-
tional sensors to be connected
164
Installation
NOTICE
For twin-head pumps in a twin-head pump housing, the pump on the left in the dir-
ection of flow is configured as the main pump at the factory. The differential pres-
sure sensor is mounted on this pump. The Wilo Net bus communication cable is also
mounted and configured on this pump at the factory.
Two single pumps as twin-head pump in Y-piece:
In the example in Fig. 17, 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" [} 178] section and "Twin-head pump operation" [} 209]
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.
In the following cases, sensor sleeves must be installed in the pipes for the admission of
temperature sensors:
ƒ
heating/cooling quantity measurement
ƒ
temperature control
Heating/cooling quantity measurement
A temperature sensor must be installed in the flow and return of the hydraulic circuit,
via which the pump records the two temperature values. The temperature sensors are
configured in the pump menu.
NOTICE
The heat/cooling quantity measurement is not suitable for billing the amount of en-
ergy consumed. It does not meet the calibration requirements for billing-relevant
energy quantity measuring instruments.
Temperature difference ΔT-c and temperature T-c
For the detection of one or two temperatures, the temperature sensors must be in-
stalled at suitable positions in the pipe. The temperature sensors are configured in the
pump menu. Detailed information on the sensor positions for each pump control mode
can be found in the Consulting guide. See www.wilo.com.
NOTICE
Available as accessories:
Temperature sensor Pt1000 for connection to the pump (tolerance class AA accord-
ing to IEC 60751)
Sensor sleeves for installation in the piping
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
WILO SE 2021-12