Twin-Head Pump Function/Y-Piece Application - Wilo Stratos GIGA Série Notice De Montage Et De Mise En Service

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6.3 Twin-head pump function/
Y-piece application
Fig. 13: Example, differential pressure
sensor connection
InterFace module (IF module)
82
NOTICE:
The properties described below are only available if the internal MP
interface (MP = Multi Pump) is used.
• Both pumps are controlled by the master pump.
If one of the pumps malfunctions, the other will run according to
the master's control settings. In case of a total failure of the master,
the slave pump operates at emergency operation speed.
The emergency operation speed can be set in menu <5.6.2.0>
(see chapter 6.3.3 "Operation during interruption of communication"
on page 84).
• The master's display will show the status of the twin-head pump.
On the slave display, "SL" will appear.
• In the example in Fig. 13, the master pump is the left-hand pump
in the direction of flow. Connect the differential pressure sensor to
this pump.
The measuring points of the master pump differential pressure sensor
must be on the suction and pressure side of the double-pump system
in the corresponding collector pipe (Fig. 13).
For communication between pumps and the building management
system, one IF module (accessories) is required. This is plugged into
the terminal room (Fig. 1).
• The master-slave communication uses an internal interface (terminal:
MP, Fig. 24).
• Normally for twin-head pumps, only the master pump must be
equipped with an IF module.
• For pumps in Y-pipe applications in which the electronic modules are
connected to each other through the internal interface, only the mas-
ter pumps require an IF module.
Communication
PLR/Interface converter
LONWORKS network
BACnet
Modbus
CAN bus
Tab. 2: IF modules
NOTICE:
The procedure and further information for commissioning and con-
figuring the IF module on the pump can be found in the installation
and operating instructions of the IF module used.
Master pump Slave pump
IF module PLR No IF module
necessary
IF module LON No IF module
necessary
BACnet IF module No IF module
necessary
Modbus IF module No IF module
necessary
IF module CAN No IF module
necessary
WILO SE 04/2020