Wilo STRATOS GIGA, Installation And Operating Instructions Manual, Page: 78 / 265

English
78 WILO SE 03/2018
Electronic module The electronic module controls the speed of the pump within the
control range that can be adjusted by the setpoint.
The hydraulic output is controlled by differential pressure and the set
control mode.
In all control modes, however, the pump adapts itself continuously to
the changing power requirements of the system, which is the case
especially when thermostatic valves or mixers are used.
The basic advantages of the electronic control are:
• Energy saving at the same time as reduced operating costs
• Reduced number of differential pressure valves required
• Reduction of flow noise
• Modification of the pump to changing operating requirements
Legend (Fig. 9):
1
Attachment points cover
2 Operating button
3 Infrared window
4 Control terminals
5 Display
6 DIP switch
7 Power terminals (mains terminals)
8 Interface for IF module
6.2 Control modes The selectable control modes are:
Δ p-c:
The electronics keep the differential pressure created by the pump
above the permitted feed flow range constantly at the pre-selected
differential pressure setpoint H
s
up to the maximum pump curve
(Fig. 10).
Q = Volume flow
H =
Differential pressure (min./max.)
H
S
= Differential pressure setpoint
NOTICE:
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.
Δ p-v:
The pump electronics linearly change the differential pressure set-
point to be kept by the pump between the delivery heads H
s
and ½ H
s
.
The differential pressure setpoint H
s
decreases or increases with the
volume flow (Fig. 11).
Q = Volume flow
H =
Differential pressure (min./max.)
H
S
= Differential pressure setpoint
NOTICE:
For further information about setting the control mode and the asso-
ciated parameters, see chapter 8 "Operation" on page 95 and
chapter 9.4 "Setting the control mode" on page 111.
NOTICE:
A differential pressure sensor is needed for the control modes that are
being performed (
Δ p-c and Δ p-v) which sends the actual value to the
electronic module.
NOTICE:
The pressure range of the differential pressure sensor must match the
pressure value in the electronic module (menu <4.1.1.0>).
Fig. 9: Electronic module
2
5
3
1 8
6 4
7
Fig. 10: Δ p-c control
Q
s
H
m a x
H
H
s
H
min
Fig. 11: Δ p-v control
Q
H
H
Q
H
m a x
H
s
½ H
s
H
min