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Circulation pump Magna1

Circulation pump Magna1
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Circulation pump Magna1
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408.52€
Ex Tax: 408.52€
  • Stock: In Stock
  • Brand: Grundfos
  • Model: 99221216
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Grundfos MAGNA1 – circulation pump for heating and domestic hot water

Grundfos MAGNA1 is an energy-efficient variable speed circulator pump for heating, domestic hot water, air conditioning and cooling systems. The pump offers intelligent pressure and flow control, high efficiency and easy integration with building automation systems.

High efficiency EEI ≤ 0.23 and intelligent control for minimum energy consumption.
Intelligent control Proportional pressure, constant pressure and constant speed.
Easy operation No external motor protection, built-in electronics and Grundfos GO Remote.

Main advantages of MAGNA1

  • Variable speed circulation pump for heating and domestic hot water.
  • Suitable for one- and two-pipe heating systems.
  • Suitable for underfloor heating, radiators and mixing circuits.
  • Suitable for domestic hot water systems.
  • Suitable for air conditioning, refrigeration and heat pump systems.
  • Suitable for solar heating systems and heat recovery systems.
  • High energy efficiency with EEI ≤ 0.23.
  • Integrated frequency converter for smooth speed variation.
  • Proportional pressure, constant pressure and constant speed.
  • No need for external motor protection.
  • Built-in thermal protection against overload and blocking.
  • Low noise level during operation.
  • Long service life and minimal maintenance.
  • Ability to communicate with Grundfos GO Remote.
  • Possibility of external control via digital input and relay output.
  • Insulation sleeves in the kit for heating applications.

Applications

  • One-pipe and two-pipe heating systems.
  • Main pumps, zone pumps and mixing circuits.
  • Pumps for heating surfaces and underfloor heating.
  • Domestic hot water systems.
  • Air conditioning and cooling.
  • Heat pump systems and heat recovery systems.
  • Solar heating systems.
  • Geothermal heat pump systems.

How do you read the model designation?

The model designation follows the logic MAGNA1 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.

Working conditions

  • Liquid temperature: from -10 °C to +110 °C.
  • Maximum working pressure: PN6, PN10 or PN16 depending on the model.
  • 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.

Select model MAGNA1

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.

Model Diameter Effort Joining PN Product number
25-40 DN 25 4m Threaded PN10 99221216
25-60 DN 25 6 m Threaded PN10 99221217
25-80 DN 25 8 m Threaded PN10 99221213
25-100 DN 25 10 m Threaded PN10 99221214
25-120 DN 25 12 m Threaded PN10 99221215
32-40 DN 32 4m Threaded PN10 99221233
32-60 DN 32 6 m Threaded PN10 99221234
32-80 DN 32 8 m Threaded PN10 99221235
32-100 DN 32 10 m Threaded PN10 99221236
32-120F DN 32 12 m Flanged PN10/16 99221281
32-120F DN 32 12 m Flanged PN10/16 99221285
40-60F DN 40 6 m Flanged PN10/16 99221292
40-80 F DN 40 8 m Flanged PN10/16 99221303
40-100 F DN 40 10 m Flanged PN10/16 99221304
40-120F DN 40 12 m Flanged PN10/16 99221305
40-150F DN 40 15 m Flanged PN10/16 99221306
40-180F DN 40 18 m Flanged PN10/16 99221307
50-60F DN 50 6 m Flanged PN10/16 –
50-80 F DN 50 8 m Flanged PN10/16 99221334
50-100 F DN 50 10 m Flanged PN10/16 99221335
50-120F DN 50 12 m Flanged PN10/16 99221336
50-150 F DN 50 15 m Flanged PN10/16 99221337
50-180F DN 50 18 m Flanged PN10/16 99221338
65-60F DN 65 6 m Flanged PN10/16 –
65-80F DN 65 8 m Flanged PN10/16 99221372
65-100 F DN 65 10 m Flanged PN10/16 99221373
65-120F DN 65 12 m Flanged PN10/16 99221374
65-150 F DN 65 15 m Flanged PN10/16 99221375
80-120 F PN6 DN 80 12 m Flanged PN6 99221409
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): Choose 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

MAGNA1 offers three basic control types, each with several levels of adjustment. The choice of mode depends on the system characteristics and pressure and flow requirements.

Proportional pressure (PP1, PP2, PP3)

In this mode, the pump automatically adjusts its duty point according to a selected proportional-pressure curve. The head decreases as the flow rate decreases and increases as the flow rate increases.

  • PP1: Lowest proportional pressure curve.
  • PP2: Average proportional pressure curve (factory setting).
  • PP3: Highest proportional pressure curve.

This mode is suitable for systems with relatively small pressure losses in the distribution pipelines, for example two-pipe heating systems with thermostatic valves and underfloor heating.

Constant pressure (CP1, CP2, CP3)

In this mode, the pump maintains a constant pressure regardless of the flow rate in the system. The duty point moves along the selected constant pressure curve.

  • CP1: Lowest constant pressure curve.
  • CP2: Average constant pressure curve.
  • CP3: Highest constant pressure curve.

This mode is suitable for systems with relatively large pressure losses in the distribution pipelines, for example long distribution pipelines, heavily throttled balancing valves and systems with large losses in the boiler or heat exchanger.

Constant curve / constant speed (I, II, III)

In this mode, the pump operates at a constant speed, regardless of the flow rate in the system. The duty point follows the selected curve I, II or III.

  • I: Minimum speed.
  • II: Average speed.
  • III: Maximum speed.

This mode is suitable for operation on a maximum or minimum curve, similar to an uncontrolled pump. It can be used in periods when maximum flow is required, for example when domestic hot water priority is given.

The pump is factory-set to PP2 mode - medium proportional-pressure curve. Changing the mode is done via the button on the front panel or via Grundfos GO Remote.

Additional features

  • Digital input: External start/stop control.
  • Relay output: Fault signal for integration with a building management system.
  • Grundfos GO Remote: Setpoint setting, read alarms and warnings.
  • Dual pump function: In MAGNA1 D dual-head pumps, the two heads operate in alternative mode, switching every 24 hours or in the event of a fault.

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 6–18 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 operating point and the corresponding model are determined.

Energy efficiency

MAGNA1 meets the requirements of the EuP 2015 directive with an energy efficiency index EEI ≤ 0.23 for most models. This provides significant energy savings compared to conventional circulators.

The data is consistent with the provided technical catalogue for Grundfos MAGNA1. Check the specific model, diameter, head, connection type, nominal pressure and electrical supply before ordering and installation.

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