12
WILO SE 03/2021
en
Operating buttons
Upper operating button
Press
• Select control mode.
• Activate the pump venting function (press and hold).
• Select the LED during the sync function.
Lower operating button
Press
• Selection of pump curve (I, II, III) or iPWM signal
(iPWM GT, iPWM ST) within the control mode.
• Activate manual restart (press and hold).
• Activate or deactivate selected LED during the sync
function.
3.1 Control modes and functions
Variable
differential
pressure
Δp-v
(I, II, III)
Recommended for two-pipe heating systems with radi
-
ators to reduce the flow noise at thermostatic valves.
The pump reduces the delivery head to half in the case of
decreasing volume flow in the pipe network.
Electrical energy saving by adjusting the delivery head to
the volume flow requirement and lower flow rates.
There are three pre-defined pump curves (I, II, III) to
choose from.
II
III
I
H
/m
Q
/m³/ h
NOTICE
Factory setting: Δp-v, pump curve II
