Wilo Stratos PARA Série Notice De Montage Et De Mise En Service page 35

NOTICE: The minimum and maximum set values for the delivery head during control
modes ∆p-c and ∆p-v are dependent on the pump type and can be read from the pump
curve.
If the delivery head setpoint that is set on the red button falls below the minimum set
value, the pump will run in the corresponding control mode at the minimum set value H
If the delivery head setpoint that is set on the red button exceeds the maximum set value,
the pump will run at the maximum set value H
6.2.2 Pumps without the "Red button" operating element
The pumps with external power adjustment via an analogue signal 0...10 V or PWM are
optionally available with restricted functionality (without ∆p-c and ∆p-v control modes)
and without the "Red button" operating element (Fig. 1b).
6.2.3 Control modes
Constant differential pressure (∆p-c):
H
H max
Hs
H min
The electronics keep the differential
pressure created by the pump constant
above the permitted flow range
at the selected differential pressure
setpoint H
curve.
6.2.4 Control signals 0...10 V, PWM
The functions associated with the analogue control signal 0-10 V and the available PWM
logic are described in the following section.
Control input "Analogue In 0...10 V"
with cable break detection:
n/
1
/min
n
max
n
min
Off
0,5 1
Installation and operating instructions Wilo-Stratos PARA/-Z
up to the maximum pump
S
2 3
.
max
Variable differential pressure (∆p-v):
H
H max
Hs
1
/ Hs
2
H min
Q
The electronics change the differential
pressure setpoint to be maintained by
the pump in linear form between ½H
and H . The differential pressure set-
S
point H decreases or increases with the
flow rate.
without cable break detection:
n/
1
/min
n
max
n
min
Off
U/V
10
1 2 3 10
English
.
min
Q
S
U/V
35