34 Wilo SE 06/2020
en
85-88: Pump runs at minimum speed (starting)
93-100: Pump stops (standby)
iPWM 2 mode (Solar):
In iPWM 2 mode, the pump speed is controlled according
to the PWM input signal.
Behaviour in the event of a cable break:
If the signal cable is disconnected from the pump, e.g.
due to a cable break, the pump stops.
PWM signal input [%]
0-7: Pump stops (standby)
7-15: Pump runs at minimum speed (operation)
12-15: Pump runs at minimum speed (starting)
15-95: The speed of the pump increases linearly
from n
min
to n
max
> 95: Pump runs at maximum speed
Constant
differential
pressure
Δp-c (I, II, III)
Recommended for underfloor heating for large-sized
pipes or all applications without a variable pipe network
curve (e.g. storage charge pumps), as well as 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.
Constant
speed (I, II, III)
Recommended for systems with fixed system resistance
requiring a constant volume flow.
The pump runs in three prescribed fixed speed
stages (I, II, III).
max
min
0 7 12 15
95 100
PWM
%
n
¹/min
III
I
II
H/m
Q/m³/ h
I
III
II
H/m
Q/m³/ h
NOTICE
Factory setting:
Constant speed, pump curve III
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