Grundfos ALPHA2 - Page 24

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III Speed III
ALPHA2 runs at a constant speed and consequently on a constant
curve.
In speed III, the pump is set to run on the max. curve under all
operating conditions. See fig. 14.
Quick venting of the pump can be obtained by setting the pump to
speed III for a short period. See 10.2 Venting the pump.
II Speed II
ALPHA2 runs at a constant speed and consequently on a constant
curve.
In speed II, the pump is set to run on the medium curve under all
operating conditions. See fig. 14.
I Speed I
ALPHA2 runs at a constant speed and consequently on a constant
curve.
In speed I, the pump is set to run on the min. curve under all
operating conditions. See fig. 14.
ALPHA2 changes to the curve for Automatic Night SetBack, i.e.
absolute minimum performance and power consumption, provided
certain conditions are met. See 8. Automatic Night SetBack.
Setting Pump curve Function