Grundfos 98126852 Magna3 65-150 GF Cast Iron Circulator Pump 208-230V 1.5HP

The Grundfos Magna3 65-150 GF is a premium high-efficiency variable speed circulator pump engineered for large residential, commercial, and industrial hydronic heating and cooling systems. This cast iron circulator features an advanced permanent magnet (PM) ECM motor with intelligent AUTOADAPT technology that automatically analyzes system demands and continuously optimizes performance for maximum energy efficiency and comfort.

Key Features:

• Energy Efficiency Index (EEI) below 0.20 - achieves up to 75% energy savings compared to standard circulators
• AUTOADAPT functionality automatically adjusts pump operation to real-time system demands
• Built-in flowmeter, pressure gauges, BTU meter, and temperature sensor eliminate need for additional components
• Integrated energy meter monitors heat energy distribution and consumption
• TFT display for intuitive configuration and system monitoring
• GENIair wireless communication standard, plus Grundfos GO app connectivity via Bluetooth
• Multiple control modes including constant pressure, proportional pressure, and flow limit
• Wireless communication between paired pumps for alternating, backup, or cascade operation
• Optional CIM modules for extended fieldbus communication

Technical Specifications:

• Flow Rate: 125 GPM rated, 250 GPM maximum
• Head: 33.14 ft rated, 49.22 ft maximum
• Power: 1-1/2 HP (29 to 1301 watts)
• Electrical: 208-230V, 60Hz, single phase
• Flange: GF65 (2-1/2" ANSI flange pattern)
• Housing: Cast iron (CI)
• Maximum Operating Pressure: 174 psi
• Ambient Temperature Range: 32°F to 104°F
• Canned rotor design with no mechanical seal or shaft coupling

The maintenance-free design features liquid-lubricated bearings, whisper-quiet operation, and an innovative single-screw clamp for easy pump head repositioning. Ideal for closed-loop hydronic systems where system control, monitoring, and energy efficiency are priorities.