GRUNDFOS GRUNDFOS High-efficiency circulation pump ALPHA2 GO 25-40 180 220-240V 9H DD0 – 93074249

ALPHA2 GO 25-40 180 The ALPHA2 GO is a high-efficiency circulator pump with an electronically commutated motor. It is designed for circulating liquids in heating and air conditioning systems. The Grundfos GO app offers numerous digital functions that simplify commissioning for both new and replacement installations. With the Grundfos GO app, you can easily verify the best selection when replacing integrated as well as external circulators; in addition, the exact pump curves can be easily adopted. The ALPHA2 GO has intelligent control modes: constant pressure, proportional pressure, constant flow rate, and constant curve. Each control mode has adjustable setpoints. The AUTOADAPT setting, available for constant and proportional pressure, eliminates the need for manual selection of the pump setpoint. The PWM input enables precise external speed control, allowing for even better optimization of the overall system. The installation connector significantly simplifies installation without additional tools. Automatic self-venting and dry-running protection ensure quiet and reliable pump operation. The product features a robust start-up mode that prevents the risk of blockages due to contamination, magnetite, or scale deposits. In the unwanted event of the pump blocking, the motor continuously attempts to start with the highest possible torque, ensuring start-up even under difficult conditions. The ceramic shaft and ceramic bearings are subject to only minimal wear. This increases the service life and reduces the likelihood of noise, such as that which can occur with wear due to increased bearing play. If the system's air detection and venting function detects air in it, the circulator pump begins to pulsate to more effectively push the air to the nearest vent valve. The Grundfos GO app also offers the convenient option of checking the system based on event logs and historical data for flow rate, head, estimated media temperature, and duty cycle. Type of control: Frequency converter: integrated Pumped liquid: Pumped liquid: Water Liquid temperature range: 2 .. 110 Celsius Liquid temp. at data acquisition: 20 Celsius Density: 998.2 kg/m3 Technical data: Rated flow rate: 1.53 m3/h Rated head: 2.06 m Pump head orientation: 9H Approvals: CE, VDE Materials: Pump housing: Cast iron Pump housing: EN 1561 EN-GJL-150 Pump housing: ASTM A48M-150B Impeller material: Composite Impeller: PES 30% GF + PESU-GF20% Installation: Ambient temperature: 0 .. 55 Celsius Max. operating pressure: 10 bar Pipe connection standard: ISO 228-1 Connection type: G Connection size: 1 1/2 inch Pressure rating: PN 10 Installation length: 180 mm Electrical data: P1 min.: 3 W Maximum power consumption P1: 21 W Mains frequency: 50 / 60 Hz Rated voltage: 1 x 220-240 V Minimum current consumption: 0.04 A Maximum current consumption: 0.26 A Enclosure class (according to IEC 34-5): IP44 Insulation class (IEC 85): F Thermal protection: Electronic Other: Energy efficiency index (EEI): 0.16 Net weight: 1.89 kg Gross weight: 2.07 kg Shipping volume: 0.004 m3 Country of origin: RS Customs tariff no.: 84137030