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Circulation pump Magna3

Circulation pump Magna3
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Circulation pump Magna3
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488.28€
Ex Tax: 488.28€
  • Stock: In Stock
  • Brand: Grundfos
  • Model: 97924244
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Grundfos MAGNA3 – intelligent circulator pump with AUTOADAPT

Grundfos MAGNA3 is a high-efficiency variable speed circulator pump with intelligent control for heating, air conditioning, cooling and domestic hot water systems. The pump offers AUTOADAPT, FLOWADAPT, FLOWLIMIT, temperature and pressure control, built-in differential pressure and temperature sensor, heat energy monitor and easy integration with building management systems.

Maximum efficiency AUTOADAPT and FLOWADAPT ensure optimal performance and minimum energy consumption.
Intelligent control Proportional, constant, temperature and differential control with built-in sensor.
Advanced functions FLOWLIMIT, night mode, multipump function, energy monitor and Grundfos GO.

Key advantages of MAGNA3

  • Intelligent variable speed circulation pump for heating, air conditioning and domestic hot water.
  • AUTOADAPT – automatic adaptation to the system for minimum energy consumption.
  • FLOWADAPT and FLOWLIMIT – control of maximum flow rate and reduce the need for throttling valves.
  • Proportional pressure, constant pressure, constant temperature and differential temperature.
  • Built-in differential pressure and temperature sensor.
  • Thermal energy monitor for energy efficiency optimization.
  • Automatic night mode for additional energy savings.
  • Multipump function for controlling two or more pumps without an external controller.
  • No need for external motor protection.
  • Advanced user interface with TFT display and high-quality silicone buttons.
  • Ability to communicate with Grundfos GO, CIM modules and building management systems.
  • Suitable for heating systems, air conditioning, cooling, heat pumps and solar systems.
  • Insulation sleeves in the kit for heating applications.

Applications

  • Main pumps in heating and cooling systems.
  • Zone pumps and mixing circuits.
  • Pumps for heating and cooling surfaces.
  • Domestic hot water systems.
  • Air conditioning, refrigeration and heat pump systems.
  • Solar heating systems and heat recovery systems.
  • Geothermal heat pump systems.
  • Cooling towers and chillers.

How do you read the model designation?

The model designation follows the logic MAGNA3 XX-YY [F] [PN6] , where:

  • XX – nominal diameter of the connection in mm (25, 32, 40, 50, 65, 80).
  • YY – maximum pressure in decimeters (40 = 4 m, 60 = 6 m, 120 = 12 m, 180 = 18 m).
  • F – flange connection (without F = threaded connection).
  • PN6 – nominal pressure of the flange connection up to 6 bar.

A larger first number means a larger pipe diameter and higher possible flow rate. A larger second number means a higher head, suitable for higher pressure losses in the system.

The pump is designed for clean, non-aggressive liquids similar to water. In heating systems, the water must meet accepted quality standards, e.g. VDI 2035. For domestic hot water, it is recommended to use pumps with a stainless steel housing.

Working conditions

  • Liquid temperature: from -10 °C to +110 °C.
  • Maximum working pressure: PN16 (16 bar) for most models.
  • Minimum inlet pressure: according to the table in the catalog to avoid cavitation.
  • Ambient operating temperature: from 0 °C to +40 °C.
  • Protection level: IPX4D.
  • Insulation class: F.
  • Power supply: 1 × 230 V, 50/60 Hz.
  • The pump can operate against a closed valve without damage.

Installation guidelines

  • The pump is designed for indoor installation.
  • It is mounted with a horizontal motor shaft.
  • It can be installed in horizontal and vertical pipelines.
  • The control box must be in a horizontal position with the Grundfos logo in a vertical position.
  • Provide sufficient space for cooling and servicing.
  • Use the insulation sleeves supplied with the pump for heating systems.
  • The electrical connection and protection must be carried out in accordance with local regulations.
  • The pump must always be properly grounded.
  • No external motor protection is required.
  • For systems with an external pressure or temperature sensor, follow the diagrams in the catalog.

Select model MAGNA3

The models differ in nominal diameter, maximum head, connection type and nominal pressure. The first number indicates the diameter of the connection, the second - the maximum head in decimeters.

All options at once

Model Diameter Effort Joining PN Product number
25-40 DN 25 4m Threaded PN10/16 97924244
25-60 DN 25 6 m Threaded PN10/16 97924245
25-80 DN 25 8 m Threaded PN10/16 97924246
25-100 DN 25 10 m Threaded PN10/16 97924247
25-120 DN 25 12 m Threaded PN10/16 97924248
32-40 DN 32 4m Threaded PN10/16 97924254
32-60 DN 32 6 m Threaded PN10/16 97924255
32-80 DN 32 8 m Threaded PN10/16 97924256
32-100 DN 32 10 m Threaded PN10/16 97924257
32-120 DN 32 12 m Threaded PN10/16 98609707
32-120F DN 32 12 m Flanged PN10/16 97924259
40-120F DN 40 12 m Flanged PN10/16 97924270
40-150F DN 40 15 m Flanged PN10/16 97924271
40-180F DN 40 18 m Flanged PN10/16 97924272
50-60F DN 50 6 m Flanged PN10/16 –
50-120F DN 50 12 m Flanged PN10/16 97924284
50-150 F DN 50 15 m Flanged PN10/16 97924285
50-180F DN 50 18 m Flanged PN10/16 97924286
65-60F DN 65 6 m Flanged PN10/16 –
65-120 F DN 65 12 m Flanged PN10/16 97924298
65-150 F DN 65 15 m Flanged PN10/16 97924299
80-120 F PN6 DN 80 12 m Flanged PN6 97924310

Description of each option

25-40 (Model: 97924244)

Circulation pump DN 25 with a maximum head of 4 m and threaded connection. Suitable for small heating systems in apartments and small houses with low pressure losses.

25-60 (Model: 97924245)

Circulation pump DN 25 with a maximum head of 6 m and threaded connection. Suitable for small and medium-sized heating systems with moderate pressure losses.

25-80 (Model: 97924246)

Circulation pump DN 25 with a maximum head of 8 m and threaded connection. Suitable for small and medium-sized systems with higher pressure requirements.

25-100 (Model: 97924247)

Circulation pump DN 25 with a maximum head of 10 m and threaded connection. Suitable for small systems with longer runs and higher losses.

25-120 (Model: 97924248)

Circulation pump DN 25 with a maximum head of 12 m and threaded connection. Suitable for small systems with the highest pressure requirements in this group.

32-40 (Model: 97924254)

Circulation pump DN 32 with a maximum head of 4 m and threaded connection. Suitable for medium-sized heating systems with low pressure losses.

32-60 (Model: 97924255)

Circulation pump DN 32 with a maximum head of 6 m and threaded connection. Suitable for medium-sized systems with moderate pressure losses.

32-80 (Model: 97924256)

Circulation pump DN 32 with a maximum head of 8 m and threaded connection. Suitable for medium-sized systems with higher pressure requirements.

32-100 (Model: 97924257)

Circulation pump DN 32 with a maximum head of 10 m and threaded connection. Suitable for medium-sized systems with longer runs and higher losses.

32-120 (Model: 98609707)

Circulation pump DN 32 with a maximum head of 12 m and threaded connection. Suitable for medium-sized systems with high pressure losses.

32-120 F (Model: 97924259)

Circulation pump DN 32 with a maximum head of 12 m and flange connection. Suitable for medium and larger systems with high pressure losses.

40-120 F (Model: 97924270)

Circulation pump DN 40 with a maximum head of 12 m and flange connection. Suitable for larger systems with high pressure losses.

40-150 F (Model: 97924271)

Circulation pump DN 40 with a maximum head of 15 m and flange connection. Suitable for large systems with very high losses.

40-180 F (Model: 97924272)

Circulation pump DN 40 with a maximum head of 18 m and flange connection. Suitable for large systems with the highest pressure requirements in this group.

50-60F

Circulation pump DN 50 with a maximum head of 6 m and flange connection. Suitable for large systems with moderate pressure losses. Product number not specified.

50-120 F (Model: 97924284)

Circulation pump DN 50 with a maximum head of 12 m and flange connection. Suitable for large systems with high pressure losses.

50-150 F (Model: 97924285)

Circulation pump DN 50 with a maximum head of 15 m and flange connection. Suitable for very large systems with very high losses.

50-180 F (Model: 97924286)

Circulation pump DN 50 with a maximum head of 18 m and flange connection. Suitable for very large systems with the highest pressure requirements.

65-60F

Circulation pump DN 65 with a maximum head of 6 m and flange connection. Suitable for very large systems with moderate losses. Product number not specified.

65-120 F (Model: 97924298)

Circulation pump DN 65 with a maximum head of 12 m and flange connection. Suitable for very large systems with high losses.

65-150 F (Model: 97924299)

Circulation pump DN 65 with a maximum head of 15 m and flange connection. Suitable for very large systems with very high losses.

80-120 F PN6 (Model: 97924310)

Circulation pump DN 80 with a maximum head of 12 m and flange connection PN6. Suitable for specific applications with low operating pressure and high flow rate.

For some models in the list, the product number is not indicated. For the exact product number and configuration, consult the technical catalogue or Grundfos Product Center.

How to choose a model?

  • Diameter (25, 32, 40, 50, 65, 80): Select according to the diameter of the existing pipes and the required flow rate.
  • Head (40–180): Choose according to the pressure losses in the system. Higher head is needed for higher losses.
  • Threaded or flanged: Threaded models are for smaller diameters and smaller systems. Flanged models are for larger diameters and larger systems.
  • PN6, PN10, PN16: Select according to the maximum working pressure of the system.

Control modes

MAGNA3 offers an extensive range of control modes, including AUTOADAPT, FLOWADAPT, proportional pressure, constant pressure, constant temperature, differential temperature and constant curve. The choice of mode depends on the system characteristics and the pressure, flow and temperature requirements.

AUTOADAPT (factory setting)

AUTOADAPT is an intelligent mode that automatically adapts the pump's operating point to the actual system characteristics. The pump starts with a factory setting and automatically selects a lower curve when it registers a lower pressure, ensuring minimal energy consumption and noise level.

Recommended for most heating systems, especially when replacing existing pumps when the duty point is not known.

FLOWADAPT with FLOWLIMIT

FLOWADAPT combines AUTOADAPT with the flow limitation function FLOWLIMIT. This mode is suitable for systems where maximum flow limitation is required, for example in balanced systems with mixing circuits or for main pumps in boiler applications.

FLOWLIMIT ensures that the flow rate never exceeds the set value, reducing the need for throttling valves and saving energy.

Proportional pressure

In this mode, the pump head increases proportionally to the flow rate to compensate for large pressure losses in the distribution pipes. Suitable for two-pipe heating systems with thermostatic valves, long distribution pipes and systems with large losses in the boiler or heat exchanger.

Constant pressure

In this mode, the pump maintains a constant pressure regardless of the flow rate in the system. Suitable for systems with low pressure losses, such as underfloor heating, one-pipe systems and systems sized for natural circulation.

Constant temperature

This mode ensures a constant temperature in the return pipe of the system. Suitable for domestic hot water systems and heating systems with a fixed characteristic. Can be combined with FLOWLIMIT to control the maximum circulation flow rate.

Differential temperature

This mode ensures a constant temperature difference between the supply and return pipes. Requires an external temperature sensor in addition to the internal pump sensor. Suitable for heating and cooling systems where temperature difference control is required.

Constant curve / constant speed

In this mode the pump runs at a constant speed, regardless of the flow rate in the system. It can be used to operate on a maximum or minimum curve, similar to an uncontrolled pump. Suitable for periods when maximum flow is required, for example when domestic hot water priority is given.

Automatic night mode

When activated, the pump automatically switches between normal operation and night mode at low demand. The switchover is based on the supply pipe temperature. Provides additional energy savings during periods of low load.

Multipump function

Allows the control of two or more pumps connected in parallel without an external controller. The pumps communicate via the GENIair wireless connection. Available in modes: alternative operation, backup operation and cascade operation.

The pump is factory-set to AUTOADAPT mode. Changing the mode and settings is done via the control panel or via Grundfos GO Remote.

Model comparison

The choice of model depends on the diameter of the pipes, the required flow rate and the pressure losses in the system. A larger diameter allows for a higher flow rate. A higher head is required for higher pressure losses.

Main model groups

Group Diameter Effort Joining Application
25-xx DN 25 4–12 m Threaded Small heating systems, apartments, small houses.
32-xx DN 32 4–12 m Threaded / Flanged Medium heating systems, larger houses, small buildings.
40-xx F DN 40 12–18 m Flanged Larger heating systems, commercial buildings, hotels.
50-xx F DN 50 6–18 m Flanged Large heating systems, industrial and commercial sites.
65-xx F DN 65 6–15 m Flanged Very large systems, district heating, large buildings.
80-120 F PN6 DN 80 12 m Flanged Specific applications with low working pressure (PN6).

How to choose the thrust?

  • 40–60 (4–6 m): For systems with low pressure losses, short runs, small buildings.
  • 80–100 (8–10 m): For medium loss systems, longer runs, medium buildings.
  • 120–180 (12–18 m): For systems with high losses, long runs, large and multi-story buildings.

Threaded or flanged connection?

Characteristics Threaded Flanged
Diameter DN 25, DN 32 DN 32–DN 80
Installation Directly into the pipe with threaded fittings Through flanges suitable for larger pipelines
Application Small and medium systems Medium, large and very large systems
Support Easier disassembly for small systems More convenient for large pipelines and heavy pumps
For the correct selection of a pump it is necessary to know the maximum required flow rate Q and the maximum pressure loss H in the system. By plotting these values in the pump diagram, the duty point and the corresponding model are determined. For precise determination of the duty point, use the Grundfos Product Center.

Energy efficiency

MAGNA3 meets the requirements of the EuP directive with a very low energy efficiency index. The AUTOADAPT and FLOWADAPT functions provide additional energy savings by automatically adapting to the system and limiting the flow rate.

The data is consistent with the provided technical catalog for Grundfos MAGNA3. Check the specific model, diameter, head, connection type, nominal pressure and electrical supply before ordering and installation.

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