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

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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.01/2022-06 41
NOTICE
If the volume flow decreases due to closing valves and if this falls below
limit, the pump is stopped.
The pump checks every 5 minutes (300 s) whether the volume flow re-
quirement increases again. As soon as this occurs, the pump continues in
its set control mode in control mode.
The time interval to check whether the volume flow has increased com-
pared to the set minimum volume flow "No-Flow Stop limit" is 10 s.
10.2.2 Constant differential pressure Δp-
c specific parameters
When the control mode “constant differential pressure ∆p-c” is selected, the following
parameters appear:
Universal Display text
1.1.1 Control mode
1.1.2 Δp-c Setpoint Δp-c
1.1.7 Emergency operation mode
1.1.8 Emergency operation speed
1.1.9 Setpoint source
1.1.9 / 1 Internal setpoint
1.1.9 / 2 Analog input (AI2)
1.1.9 / 3 CIF module
1.1.10 Substitute setpoint
1.1.11 No-flow stop: ON/OFF
1.1.12 No-flow stop: limit
1.1.15 Pump ON/OFF
• Setting the setpoint ∆p-C
When selecting the menu item, the desired delivery head can be set as the setpoint.
NOTICE
The setpoint can only be set if the setpoint source is set to "Internal set-
point" (see Setting the setpoint source).
• Setting the emergency operating mode.
In the event of a fault, the failure of the required sensor, an emergency mode can be
defined.
When the emergency operation mode menu item is confirmed, you can choose between
Pump OFF and Pump ON. When selecting Pump ON, another menu item “Emergency
speed” appears. The emergency speed can be set here.
• Setting the setpoint source.
Sources can be selected between “Internal setpoint‘, “Analogue input AI 2” or a CIF
module.
NOTICE
A CIF module can only be selected as a setpoint source if a CIF module is
installed. If no CIF module is installed, the menu item cannot be selected
(‚greyed out‘).
If the setpoint is selected via the "Analogue input AI 2", the analogue in-
put can be set via the Settings menu.
If an external setpoint source is selected (analogue input or CIF module), the menu item
"substitute setpoint" appears. A fixed setpoint can be specified here, which is used for the
control in the event of a failure of the setpoint source (e.g. cable break at the analogue in-
put, no communication with the CIF module).