Double Pump Function/Y-Pipe Application - Wilo Stratos GIGA Betriebsanleitung

H
H
n
max
H
s
s
n
min
Fig. 12: Constant speed
6.3 Double pump function/
Y-pipe application
Fig. 13: Example, differential pressure
sensor connection
InterFace module (IF module)
Installation and operating instructions Wilo-Stratos GIGA, GIGA-D, GIGA B
Constant speed:
The speed of the pump can be kept to a constant speed between
n and n
min max
control modes.
PID-Control:
If the aforementioned standard control modes cannot be used –
e.g. if other sensors are to be used or the distance between the sen-
Q
Q sors and the pump is very large – then the PID-Control function
(Proportional Integral Differential control) is available.
By selecting a good combination of individual control portions, the
operator can ensure fast reacting, constant control without lasting
setpoint deviations.
The output signal of the selected sensor can take any intermediate
value. The respective actual value reached (sensor signal) will be
shown as a percent (100 % = maximum measurement range of the
sensor) on the status page of the menu.
NOTICE:
The displayed percent value only corresponds indirectly to the current
delivery head of the pump(s). It is possible, for example, that the
maximum delivery head has already been reached at a sensor
signal < 100 %.
For further information about setting the control mode and the
associated parameters, see chapter 8 "Operation" on page 95 and
chapter 9.4 "Setting the control mode" on page 111.
NOTICE:
The properties described below are only available if the internal MP inter-
face (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 82).
• The master's display will show the status of the double 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. 25).
• Normally for double 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.
(11-22kW)
(Fig. 12). "Constant speed" mode deactivates all other
English
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