Wilo Para Notice De Montage Et De Mise En Service page 32

Operating button
Variable differential
pressure Δp-v
(I, II, III)
H/m
III
II
I
Constant differential
pressure Δp-c
(I, II, III)
H/m
III
II
I
32
Press
• Select control mode
• Select pump curve (I, II, III) within the control mode
Press and hold
• Activate the pump venting function
(press for 3 seconds)
• Activate manual restart (press for 5 seconds)
• Lock/unlock button (press for 8 seconds)
3.1 Control modes and functions
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.
Q/m³/ h
Recommended for underfloor heating or for large-sized
pipes, applications without a variable pipe network
curve (e.g. storage charge pumps) or
single-pipe heating systems with radiators.
The control keeps the set delivery head constant irre-
spective of the pumped volume flow.
There are three pre-defined pump curves (I, II, III) to
choose from.
Q/m³/ h
Wilo SE 08/2017