Grundfos ALPHA2 User Manual

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13. Technical data and installation dimensions
Contents:
13.1 Technical data
13.2 Installation dimensions – GRUNDFOS ALPHA2 XX-40, XX-50, XX-
60
13.3 Installation dimensions – GRUNDFOS ALPHA2 25-40 A, 25-60 A.
13.1 Technical data
To avoid condensation in the control box and stator, the liquid
temperature must always be higher than the ambient temperature.
Supply voltage 1 x 230 V – 10 %/+ 6 %, 50 Hz, PE
Motor protection The pump requires no external motor protection.
Enclosure class IP 42
Insulation class F
Relative air humidity Maximum 95 %
System pressure Maximum 1.0 MPa, 10 bar, 102 m head
Inlet pressure
Liquid temperature Minimum inlet pressure
≤ +75 °C 0.05 bar, 0.005 MPa, 0.5 m head
+90 °C 0.28 bar, 0.028 MPa, 2.8 m head
+110 °C 1.08 bar, 0.108 MPa, 10.8 m head
EMC EN 61000-6-2 and EN 61000-6-3
Sound pressure level The sound pressure level of the pump is lower than 43 dB(A).
Ambient temperature 0 °C to +40 °C
Temperature class TF110 to CEN 335-2-51
Surface temperature The maximum surface temperature will not exceed +125°C.
Liquid temperature +2 °C to +110 °C
Ambient temperature
[°C]
Liquid temperature
Min.
[°C]
Max.
[°C]
02110
10 10 110
20 20 110
30 30 110
35 35 90
40 40 70
Caution
In domestic hot-water systems, it is recommended to keep the liquid
temperature below 65 °C to eliminate the risk of lime precipitation.

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