Circulation pump Grundfos Alpha2 25-40 180 (Denmark)

Purpose: the Circulation pump Grundfos ALPHA 2 25-4 180 is designed for circulating liquids in heating systems. ALPHA2 - the most modern representative of the 2nd generation of the family high-quality circulation pumps Grundfos. Pump ALPHA 2 25-40 180 performs the automatic regulation of the pressure difference, ensuring that the desired temperature without connecting external additional devices.
After installation of the pump without changing factory settings mode "AUTOADAPT" automatically analyzes the system heating, finds the optimal configuration and regulates the operation of the pump in accordance with changes in consumption.
Thus provides optimal comfort while minimizing energy consumption. Mode "AUTOADAPT" can be used in 80% of cases of all systems heating.
Specifications:
Pressure max m: 4,0
Weight kg: 2,3
Material:
Pump body: cast Iron
Impeller: Composite material
Rotor type: Wet
Temperature range of the pumped liquid °C: +2...+110
Installation conditions:
The range of ambient temperature °C: 0...+40
Threaded connection: 1½"G
Installation length mm: 180
Max. working pressure Bar: 10
The capacity Qmax(m3/h): 2,4
Fixed rate: 3
Data of energy consumption:
Power consumption Wt: 5...22
Mains frequency Hz: 50
Nominal voltage Vlt: 1 x 230
Rated current A: 0,05
The maximum current A: 0,19
Thermal protection: ELEC
Energy efficiency class: A
Protection class (IEC 34-5): IP42
Insulation class (IEC 85): F
Noise level DB: 43
Country of manufacturer: Denmark

Distinctive features of the pump:
Pump ALPHA2 due to the frequency of the frequency Converter, corresponds to energy efficiency class A and consumes 80 % less power than circulation pumps "D" class. Function "AUTOADAPT" (proportional pressure regulation)
Automatic adjustment (2 modes constant pressure, 2 mode proportional pressure control)
The function automatically reduces the pressure of the pump when the boiler is in economy mode.
The led indicator continuously shows the current consumption.
Simple operation the operation of the pump by pressing one button.
Socket ALPHA provides easy connection of the pump to the mains.