Grundfos ALPHA2 User Manual

14
7. Setting the pump
Contents:
7.1 Pump setting for system type
7.2 Pump control.
7.1 Pump setting for system type
Fig. 9 Selection of pump setting for system type
Factory setting = AUTO
ADAPT.
Recommended and alternative pump settings according to fig. 9:
AUTO
ADAPT (underfloor heating and two-pipe systems)
The AUTO
ADAPT function adjusts the pump performance to the actual
heat demand in the system. As the performance is adjusted gradually, it is
recommended to leave the pump in the AUTO
ADAPT position at least one
week before changing the pump setting.
If you choose to change back to AUTO
ADAPT, the pump remembers its
last setpoint in AUTO
ADAPT and resumes the automatic adjustment of the
performance.
TM03 8927 2707
A
B
C
Pos. System type
Pump setting
Recommended Alternative
A Underfloor heating AUTO
ADAPT*
Highest constant-pressure curve
(CP2)* or
lowest constant-pressure curve
(CP1)*
B Two-pipe systems AUTO
ADAPT*
Highest proportional-pressure
curve (PP2)*
C One-pipe systems
Lowest proportional-pressure
curve (PP1)*
Highest proportional-pressure
curve (PP2)*
* See 14.1 Guide to performance curves.

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