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

7. Setting the product

To set the product use the button on the operating panel. Every time
you press the button, the pump setting is changed. The LEDs will
indicate the chosen control mode. A cycle is five button presses.
Display Control mode
Constant curve 1
Constant curve 2
Constant curve 3
Radiator mode
Underfloor mode
PWM profile A
The LED flashes.
Fixed control curve
The LEDs flash.
The pump automatically enables the PWM input-signal control
mode when the signal cable is plugged in and the PWM signal is
detected by the pump. If the pump does not detect a PWM signal or
if the signal equals 0, the pump will switch to the control mode
selected before connecting to a PWM signal. For details on setting
the PWM input signal, see section Setting the PWM input signal.
To select the fixed proportional-pressure curve, press and hold the
button for 3 seconds. To disable this control mode, press and hold
the button for 3 seconds.
To learn more about each control mode, see section Control modes.
The pump has been factory-set to radiator heating mode.
Related information
6.2 Control modes
7.1 Setting the PWM input signal
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