Wilo Helix2.0-VE, Инструкция по установке и эксплуатации

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en
Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.01/2022-06 37
10.1 Control functions
Control mode
nc
PID control
p-c
The following control functions are available:
• Constant differential pressure ∆p-c
• Variable pressure ∆p-v
• Constant speed (n-c)
• PID control
• Constant pressure p-c
Constant differential pressure ∆p-c
Q
H
∆p-c
∆p-c
The control keeps the differential pressure created by the pump constant at the selected
setpoint H
setpoint
whatever the delivery rate required by the installation.
A relative differential pressure sensor is used for control (sensor: accuracy: ≤ 1 %; using is the
range of 30 % to 100 %).
Constant differential pressure ∆p-v
Q
H
H
set
H
2
set
∆p-v
∆p-v
The control keeps the differential pressure created by the pump constant above the permit-
ted flow rate at the selected differential pressure setpoint H
setpoint
up to the maximum char-
acteristic curve.
Assuming a maximum required delivery head at the design point, the pump variably adjusts
the pump output to the required volume flow. The volume flow varies due to the open and
closed valves on the consumer circuits. The pump output is adjusted to the requirements of
the consumer load and the energy requirement is reduced.
A relative differential pressure sensor is used for control (sensor: accuracy: ≤ 1 %; using is the
range of 30 % to 100 %).
Constant speed (n-c / factory setting)
The speed of the pump is kept at a set constant speed.
User-defined PID control