Grundfos ALPHA1 GO 25-60 180 Circulating Pump

ALPHA1 GO 25-60 180 is a high-efficiency circulator pump designed to circulate liquids in heating and air conditioning systems. It features an electronically commutated motor and intelligent controls with three control modes for precise adaptation to your installation. Quick replacements and startups are made easy thanks to its tool-free electrical connector and compatibility with the Grundfos GO app.

Engineered for reliable and quiet operation, it includes self-venting and dry-run protection functions. Its three control modes (constant pressure, proportional pressure, and constant curve), each with three speed settings, allow you to optimize performance according to system requirements. With Grundfos GO and the control panel, replacing previous pumps and replicating existing curves is simplified. The startup strategy is designed to minimize blockages caused by dirt, magnetite, or limescale; if a blockage occurs, the motor attempts to start with maximum torque to restore service. The ceramic shaft and bearings reduce wear and the likelihood of noise in the circuit. Troubleshooting is streamlined with error codes displayed on the pump panel.

• Three control modes: constant pressure, proportional pressure, and constant curve, each with three speed settings.
• Quick electrical connection via tool-free installation connector.
• Grundfos GO app and control panel for pump replacement and curve replication.
• Self-venting function and dry-run protection for quiet and reliable operation.
• Startup strategy reduces the risk of blockages; maximum torque start attempt in case of blockage.
• Ceramic shaft and bearings for reduced wear and longer service life.
• Easy diagnostics with error codes on the panel.

Technical Data

• Nominal flow rate: 2.28 m³/h.
• Maximum head: 60 dm (6 m).
• Liquid temperature range: -10 to 110 °C.
• Ambient temperature range: 0 to 55 °C.
• Maximum working pressure: 10 bar.
• Pumped liquid: water.
• Power supply: 1 x 220–240 V, 50/60 Hz.
• Power consumption (P1): 4–45 W.
• Protection rating: IP44. Insulation class: F. Thermal protection: electronic.
• Frequency converter: integrated.
• Hydraulic connection: G-type thread according to ISO 228-1; size 1 1/2".
• Port-to-port length: 180 mm.
• Energy Efficiency Index (EEI): 0.20.
• Main materials: cast iron hydraulic body; impeller made of composite (PES + 30% glass fiber).

Installation, Compatibility, and Use

• Application: circulation of liquids in heating and air conditioning systems.
• Quick electrical connection via tool-free connector.
• Use the Grundfos GO app and control panel to facilitate replacement of previous pumps and replicate curves.
• Observe operating limits: liquid temperatures between -10 and 110 °C, ambient temperature between 0 and 55 °C, and maximum working pressure of 10 bar.
• Pumped liquid: water.