Circulation pump for heating, cooling and domestic hot water systems

The Grundfos MAGNA1 50-120 F 280 is an electronic circulation pump designed for use in simple heating, air conditioning and domestic hot water circulation systems. It is an economical alternative to the MAGNA3 pump, while offering high energy efficiency and easy integration with building management systems. This is a solid solution for both installers looking for reliable equipment and end-users who value comfort and savings.

Design and application

The MAGNA1 pump is characterized by an intuitive interface, which facilitates the replacement of older circulation pump models. Made of cast iron GG 25 (GJL-250), it ensures durability and corrosion resistance. Thanks to the built-in motor speed controller, the pump speed is continuously adjustable, allowing for optimization of system operation and reduced energy consumption. It finds application in:

• Heating of single-family homes and commercial buildings
• Air conditioning
• Circulation of domestic hot water
• District heating and cooling networks
• Industrial heating

Advantages and characteristic features

• High energy efficiency: An energy efficiency index (EEI) of 0.2 guarantees low operating costs.
• Work monitoring: Continuous monitoring of the pump status, including fault detection, increases installation safety.
• Remote control: The ability to remotely start/stop the pump using a digital input facilitates integration with building automation systems.
• Dual pump function: An optional function for automatic switching to a second pump in the event of a failure, ensuring continuous system operation.
• Solid construction: The cast iron GG 25 body guarantees durability and resistance to environmental conditions.
• Stepless adjustment: The built-in motor controller allows for precise adjustment of the pump performance to current needs.
• Connections compliant with the standard: ISO 228-1 connections and flanges compliant with DIN standard facilitate installation and integration with the existing installation.
• Wide temperature range: Operation in a temperature range from -10 to 110°C makes the pump versatile in application.

The pump has a protection class of IPX4, which means it is resistant to splashing water. The rotational speed is 4188 1/min and the motor power consumption (P1) is 0.533 kW with a rated current of 2.37 A and a voltage of 230 V (1 phase). The connection length is 280 mm and the maximum head is 12 meters with a nominal flow rate (BEP) of 19.86 m³/h and a head of 60.94 kPa.