Grundfos ALPHA2 User Manual

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14.1 Guide to performance curves
Each pump setting has its own performance curve (Q/H curve). However,
AUTO
ADAPT covers a performance range.
A power curve (P1 curve) belongs to each Q/H curve. The power curve
shows the pump power consumption (P1) in Watt at a given Q/H curve.
The P1 value corresponds to the value that can be read from the pump
display, see fig. 17:
Fig. 17 Performance curves in relation to pump setting
For further information about pump settings, see
6.3 Light fields indicating the pump setting
7. Setting the pump
11. Pump settings and pump performance.
TM03 9161 3507
AUTO
ADAPT
AUTO
III
ADAPT
PP1
PP2
CP1
CP2
Q
P1
H
Q
III
II
I
Setting Pump curve
AUTO
ADAPT
(factory setting)
Setpoint within the green marked area
PP1 Lowest proportional-pressure curve
PP2 Highest proportional-pressure curve
CP1 Lowest constant-pressure curve
CP2 Highest constant-pressure curve
III Constant speed, speed III
II Constant speed, speed II
I Constant speed, speed I
Curve for Automatic Night SetBack

Grundfos ALPHA2 Specifications

General

Max Head	8 m
Voltage	230 V
Frequency	50/60 Hz
Type	Circulator Pump
Max. operating pressure	10 bar
Series	ALPHA2
Connection Type	Threaded
Protection Class	IP42
Liquid Temperature Range	2°C to 110°C
Energy Efficiency Index	≤ 0.23
Connection size	G 1 1/2
EEI	≤ 0.23