Guide to Grundfos Magna Circulating Pumps: Usage, Selection, and Installation

Electronically regulated Grundfos Magna circulating pumps are currently at the forefront of the market. They ensure energy-efficient operation of heating, cooling, and water supply systems. Discover the benefits they can bring to you.

Usage and Benefits of Grundfos Magna Circulating Pumps

Grundfos Magna circulating pumps ensure efficient fluid circulation in heating systems, hot water distribution, and air conditioning. They are suitable for both family homes and commercial buildings. Pumps from the renowned Danish manufacturer Grundfos are compatible with radiator and underfloor heating and all types of boilers.

Thanks to electronic regulation and intelligent software, fluid circulation will always be maximally efficient. This brings a number of advantages:

• Even heating, ensuring thermal comfort in every part of the property,
• immediate delivery of hot water without the need to run the water when installed on hot water distribution systems,
• reduction of energy costs by up to 80% thanks to energy-saving technologies and intelligent functions,
• reduction of carbon footprint due to minimal energy consumption,
• reduction of noise in heating systems,
• automatic and maintenance-free operation.

Compared to old three-speed pumps, you can save up to 80% of operating costs with Grundfos Magna pumps, so your investment in a new pump will quickly pay off. Old three-speed pumps cannot respond to changing needs and work unnecessarily at constant power. This is why they can no longer be manufactured or sold in the EU. With Grundfos Magna pumps, you are assured that they will comply with tightening environmental standards for many years to come.

How to Choose a Grundfos Magna Circulating Pump for Heating, Cooling, or Hot Water Distribution

When selecting a circulating pump, focus on technical specifications, product range, and intelligent functions.

Technical Specifications

The key technical parameter is the volume of the heating system - that is, the number of radiators or the area of underfloor heating. Based on this, you must choose the appropriate power or pump head. Optimal performance ensures sufficient heating at minimal costs.

You can also choose a Grundfos Magna pump based on the required flow rate and pressure. For proper installation, it is also important to select a pump with the appropriate spacing (installation length) and connection thread or flange size.

Product Lines of Grundfos Magna Pumps

The range of Grundfos Magna circulating pumps is truly extensive, so everyone can find what they need. The basic product lines are:

• Grundfos Magna Circulating Pumps: Primarily intended for heating and cooling. The pump body is made of durable cast iron.
• Grundfos Magna N Circulation Pumps: Certified for use with drinking water, making them suitable for hot water distribution; these pumps can also be used for heating and air conditioning. The pump body is stainless steel.

Grundfos Magna and Grundfos Magna N pumps are available in two variants:

• Magna1: The basic version of Grundfos Magna pumps offers control for proportional or constant pressure. You can easily select the desired mode using a button.
• Magna3: The most advanced intelligent circulating pumps. They are controlled via a control panel with a display. They feature smart functions AUTOADAPT, FLOWADAPT, and FLOWLIMIT, which increase efficiency and economy of operation without the need for manual adjustments. With an additional module, the pump can also be controlled remotely via a smartphone.

Electronic circulating pump with smart functions Grundfos Magna3. 

Intelligent Functions of Grundfos Magna3 Electronic Circulating Pumps

Grundfos Magna3 circulating pumps feature 3 smart functions. The patented AUTOADAPT function continuously evaluates system requirements, such as when you use the most hot water or when and in which rooms you most frequently heat. The Grundfos circulating pump then uses this data to optimize the operation of heating or hot water heating according to your individual needs. The pump thus consumes a fraction of the electrical energy and always ensures optimal comfort for you.

With the FLOWLIMIT function, you can easily set the maximum flow rate. This function contributes to system balance and reduces the need for balancing valves. The FLOWADAPT mode is a combination of the above functions. When this mode is activated, the AUTOADAPT and FLOWLIMIT functions are also activated.

These intelligent functions provide users with significant savings, optimal comfort, and without the need to adjust the pump. The smart software of Grundfos Magna3 pumps works completely automatically.

Installation and Maintenance of Grundfos Magna Circulating Pumps

The appropriate placement and number of circulating pumps should be determined by a designer, and thanks to their durable construction, Grundfos Magna pumps can be installed on the return pipe or at the beginning of the circuit. Before installation, it is necessary to close the water flow using valves. Use connection threads/flanges to attach the pump to the pipe. Install a magnetic filter for mechanical impurities before the pump to prevent clogging. All connections must be sealed with rubber gaskets.

Then connect the pump to the electrical network, possibly connect the control unit, and select the operating mode. Follow the instructions and safety guidelines during installation.

Almost Maintenance-Free Operation

Thanks to their durable construction, Grundfos Magna pumps exhibit minimal failure rates and require almost no maintenance.

The key to optimal operation is venting the pump. The method of venting can be found in the manual for your selected model. The most advanced models vent completely automatically. If your pump does not have this function, you can simply vent it by setting the highest speed for about 30 minutes.

If you do not use the circulating pump in winter, protect it from freezing, for example, by adding antifreeze to the operating fluid.

Discover the benefits of smart functions and maintenance-free operation of Grundfos Magna pumps for yourself. Choose from our wide range of circulating pumps for all applications.  

Choose a Grundfos Magna Circulating Pump Choose a Grundfos Magna N Circulation Pump