Control Modes - Wilo Stratos GIGA Serie Instrucciones De Instalación Y Funcionamiento

1 2
Fig. 13: Motor impeller unit
Electronic module
1 2 3
8 7 6
Fig. 14: Electronic module
6.2

Control modes

H
H
max
H
s
H
min
Fig. 15: p-c control
Installation and operating instructions Wilo-Stratos GIGA
For the following purposes, the motor impeller unit can be separated
from the pump housing (which can remain in the piping) (also see
chapter 10 "Maintenance" on page 48):
• To provide access to the inside parts (impeller and mechanical seal)
• To make it possible to separate the motor from the hydraulic unit.
When this is done, the transport eyes (Fig. 13, Item 2) are removed
from the motor flange (Fig. 13, Item 1), taken to the motor housing
and refastened there with the same screws to the motor housing
(Fig. 13, Item 3).
3
The electronic module controls the speed of the pump to a setpoint
that can be adjusted within the control range.
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
• Fewer differential pressure valves required
• Reduction of flow noise
• Adaptation of the pump to changing operating requirements
Legend (Fig. 14):
1 Control terminals
2 Attachment points cover
3 Power terminals (mains terminals)
4 Interface for IF-Module
5 4
5 DIP switch
6 Display
7 Infrared window
8 The red button
The selectable control modes are:
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
(Fig. 15).
Q = Volume flow
H = Differential pressure (min./max.)
H
Q
S
NOTE:
For further information about setting the control mode and the asso-
ciated parameters, see chapter 8 "Operation" on page 29 and
chapter 9.4 "Setting the control mode" on page 47.
up to the maximum pump curve
s
= Differential pressure setpoint
English
13