GRUNDFOS GRUNDFOS High-Efficiency Circulating Pump ALPHA2 GO 25-90 180 220-240V 9H DG0 – 93074232

ALPHA2 GO 25-90 180 The ALPHA2 GO is a highly efficient circulator pump with an electronically commutated motor. It is designed for the circulation of 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 check the best selection when replacing integrated and external circulator pumps; 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, which is available for constant and proportional pressure, makes manual selection of the pump setpoint unnecessary. The PWM input allows precise external control of the speed, which further optimizes 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 is characterized by a robust start-up mode that prevents the risk of blockages due to contamination, magnetite, or scale deposits. In the undesired event of a pump blockage, the motor continuously attempts to start with the highest possible torque, thus ensuring a start 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 that can occur with wear due to increased bearing play. If the air detection and venting function of the system 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 log and historical data for flow rate, head, estimated media temperature, and operating time. Type of control: Frequency converter: integrated Pumped liquid: Pumped liquid: Water Liquid temperature range: -10 .. 95 Celsius Liquid temp. at data acquisition: 20 Celsius Density: 998.2 kg/m3 Technical data: Rated flow rate: 2.7 m3/h Rated head: 6.14 m Pump head orientation: 9H Approvals: CE, VDE Materials: Pump housing: Cast iron Pump casing: 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 Nominal pressure rating: PN 10 Installation length: 180 mm Electrical data: P1 min.: 3 W Maximum power consumption P1: 90 W Mains frequency: 50 / 60 Hz Rated voltage: 1 x 220-240 V Minimum current consumption: 0.04 A Maximum current consumption: 0.78 A Protection class (according to IEC 34-5): IP44 Insulation class (IEC 85): F Thermal protection: Electronic Other: Energy efficiency index (EEI): 0.20 Net weight: 1.94 kg Gross weight: 2.15 kg Shipping volume: 0.004 m3 Country of origin: RS Customs tariff no.: 84137030