Setting The Product - Grundfos ALPHA1 L Installation And Operating Instructions Manual

8. Setting the product

Every time you press the push-button, the pump setting is
changed. A cycle is five button presses.
To select fixed proportional curve, press and hold the push button
for 3 seconds.
The pump automatically enables the PWM input-signal control
mode when the signal cable is plugged in. For details on setting
up the PWM input signal. See section
input signal.
To learn more about each control mode, see section
modes.
The pump has been factory-set to radiator heating
mode.
7.4.9 Setting up the PWM
7.4 Control
3 s.
15