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Grundfos MAGNA3 Manual

Circulator pumps
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GRUNDFOS DATA BOOKLET
MAGNA3
From Model D
Circulator pumps
50/60 Hz

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david hofer
January 18, 2025

DOES A MAGNA3 40 80 F 216 HAVE A CHECK VALVE

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Summary of Contents for Grundfos MAGNA3

  • Page 1 GRUNDFOS DATA BOOKLET MAGNA3 From Model D Circulator pumps 50/60 Hz...

  • Page 2: Table Of Contents

    Product description 12. Grundfos Product Center Type key Model type Pump heads in twin-head pumps Performance range, MAGNA3 Performance range, MAGNA3 D single-head operation Performance range, MAGNA3 D twin-head operation Product range System applications Heating systems Cooling systems Solar-heating systems...

  • Page 3: Product Description

    • Self-explanatory user interface with TFT display and • solar-heating systems. high quality silicone push-buttons. The MAGNA3 circulator pump is perfect for both new • Heat energy monitor. systems as well as for replacement. The pump is ideal when operating in systems requiring an automated •...

  • Page 4: Type Key

    Port-to-port length [mm] Model type Pump heads in twin-head pumps This data booklet covers MAGNA3 from model D. The The twin-head pump housing has a flap valve on the model version is stated on the nameplate. See fig. 1. outlet side. The flap valve seals off the port of the idle pump housing to prevent the pumped liquid from running back to the inlet side.

  • Page 5: Performance Range, Magna3

    80-100 50-80 40-80 32-60 70 80 Q [US GPM] 9 10 Q [m³/h] Performance range, MAGNA3 Fig. 4 Performance range, MAGNA3 D single-head operation [ft] MAGNA3 D 65-150 100-120 80-100 70 80 Q [US GPM] 9 10 Q [m³/h] Performance range, MAGNA3 D single-head operation...

  • Page 6: Performance Range, Magna3 D Twin-Head Operation

    MAGNA3 Performance range, MAGNA3 D twin-head operation [ft] MAGNA3 D 65-150 100-120 80-100 Q [US GPM] 9 10 60 70 80 90 Q [m³/h] Performance range, MAGNA3 D twin-head operation Fig. 6...

  • Page 7: Product Range

    The selection of pump size must be based on the Closed valve operation following: A MAGNA3 pump can operate at any speed against a • required maximum flow closed valve for several days without damage to the • maximum pressure loss in the system.
  • Page 8 • AUTO (factory setting) which is suitable for The Grundfos CIM modules (Communication Interface ADAPT most installations. Module) enable the MAGNA3 to connect to standard fieldbus networks, offering substantial benefits: • FLOW in systems where flow limitation is ADAPT required.

  • Page 9: System Applications

    MAGNA3 3. System applications Heating systems Fig. 10 Functional drawing of a heating system in a commercial building Pos. Description Hot water Charging pump Recirculation Hot water Recirculation Air handling unit Fan coil unit Radiator two-pipe system Radiator one-pipe system...
  • Page 10 A speed-controlled mixing-loop pump is ideal for adaptation to the varying loads in a heating surface. In this case, MAGNA3 will have full authority, making external pump throttling valves superfluous.

  • Page 11: Cooling Systems

    MAGNA3 Cooling systems Fig. 11 Functional drawing of a cooling system in a commercial building Pos. Description Cooling tower Cooling source Primary/secondary system Primary pump Secondary pump "Primary only" system Primary pump Air handling unit Fan coil unit Underfloor/ceiling...
  • Page 12 In this system, MAGNA3 will reliability. As the pumps alternate, an equal number of have full authority, eliminating the need for pump operating hours is ensured.

  • Page 13: Solar-Heating Systems

    FLOW / FLOW control mode. ADAPT LIMIT Use the benefit of the inputs and outputs of MAGNA3 to control the pump together with the heat pump. Fig. 12 Functional drawing of a solar-heating system Installation and commissioning Main pumps When installing MAGNA3, no external pressure sensor or motor protection is required.

  • Page 14: Functions

    Operating panel and display Operating status Pump performance Warning and alarm Heat energy monitor Operating log Grundfos Eye (status indicator) Communication Wireless Grundfos GO Wireless GENIair connection Pump information to BMS via CIM modules Bus via GENIbus Bus via LonWorks...

  • Page 15: Control Modes: Quick Overview

    MAGNA3 Control modes: Quick overview AUTO ADAPT set1 • We recommend this control mode for most heating systems. • During operation, the pump automatically makes the necessary adjustment to the actual system characteristic. auto_min set2 25 % 90 % FLOW...
  • Page 16 MAGNA3 Δt Differential temperature • Ensures a constant differential temperature drop across heating and cooling systems. • The pump will maintain a constant differential temperature between the pump and the external sensor. Constant curve • The pump can be set to operate according to a constant curve, like an uncontrolled pump.

  • Page 17: Operating Modes

    MAGNA3 Operating modes AUTO ADAPT We recommend the AUTO control mode for most ADAPT Normal heating systems, especially in systems with relatively The pump runs according to the selected control large pressure losses in the distribution pipes, and in mode.
  • Page 18 MAGNA3 FLOW Technical specifications ADAPT The FLOW control mode combines AUTO ADAPT ADAPT 25 % 90 % and FLOW , meaning that the pump runs LIMIT AUTO while at the same time ensuring that the Setting range ADAPT flow rate never exceeds the entered FLOW value.
  • Page 19 MAGNA3 Proportional pressure Constant pressure Proportional pressure is suitable in systems with A constant pressure is advantageous in systems with relatively large pressure losses in the distribution pipes relatively small pressure losses in the distribution pipes: and in air-conditioning and cooling systems: •...
  • Page 20 MAGNA3 Constant temperature This control mode is suitable in heating systems with a fixed system characteristic, for example domestic hot-water systems, where the control of the pump according to a constant return-pipe temperature is relevant. Characteristics and key benefits • The temperature is kept constant.
  • Page 21 MAGNA3 Depending on the pump model, you can set the Temperature sensor desired speed in % of the maximum speed. The span To measure the temperature difference of the flow pipe of control depends on the minimum speed, power and and the return pipe, you must use both the internal pressure limitation of the pump.

  • Page 22: Additional Control Mode Features

    Additional control mode features limit LIMIT reduce the pump speed to ensure that the flow rate MAGNA3 offers additional features for the control never exceeds the FLOW set, no matter if the LIMIT modes to meet specific demands.

  • Page 23: Multipump Modes

    MAGNA3 Multipump modes Automatic night setback A night setback system is often integrated into a Multipump function building management system (BMS), or as part of an equivalent electronic control system, which has a The multipump function enables control of single-head built-in timer.

  • Page 24: Flow Estimation Accuracy

    ± 10 % of the Fig. 31 Q maximum flow. See also monitor, page 26. Heat energy 1. MAGNA3 65-60 has a Q of 40 m /h. A typical 5 % accuracy means 2 m /h inaccuracy of Q . ± 2 2.

  • Page 25: Readings And Settings On The Pump

    • Warning and alarm logs. Setting the pump The MAGNA3 pump range allows you to set the pump directly on the operating panel. The menu includes all available MAGNA3 pump settings such as control mode, setpoint, relay output and bus communication.
  • Page 26 Grundfos Eye system imbalances. See also Readings and settings Grundfos Eye at the top of the operating panel is a pump, page 25. on the pump status indicator light providing information about The pump requires a temperature sensor in the flow the pump operating status.

  • Page 27: Communication

    BMS (Building Management System) or SCADA system. You can use Grundfos GO for the following functions: The CIM module communicates via fieldbus protocols. • reading of operating data • reading of warning and alarm indications modules, page 28.
  • Page 28 MAGNA3 Available CIM modules Module Fieldbus protocol Description Functions CIM 050 CIM 050 is a Grundfos communication CIM 050 has terminals for the GENIbus GENIbus interface module used for communication connection. with a GENIbus network. CIM 100 CIM 100 has terminals for the LonWorks connection.
  • Page 29 MAGNA3 Digital inputs External forced maximum or minimum curve You can force the pump to operate on the maximum or You can use the digital input for external control of start minimum curve via the digital input. or stop or forced maximum or minimum curve.
  • Page 30 You can set the function of the signal relay to Alarm, Ready or Operation on the pump operating panel or Function/control mode Sensor type with Grundfos GO. Heat energy monitor Factory settings of relays: Temperature sensor Constant temperature...
  • Page 31 1/2" connection and 4-20 mA signal. Fig. 47 Control range and setpoint Relative-pressure transmitter. Combined temperature and pressure sensor, Grundfos type RPI T2. The external setpoint function operates differently, 1/2" connection and 0-10 V signal. depending on the model. For model A,B and C, the...

  • Page 32: Operating Conditions

    The above applications do not disqualify for installation altitudes above 984 ft (300 meters), increase the of MAGNA3. However, it is important that the pump is required relative inlet pressure by 0.145 psi (0.01 bar, not installed directly in these environments.

  • Page 33: Pumped Liquids

    In domestic hot-water systems, we recommend that you use MAGNA3 pumps only for water with a degree of hardness lower than approximately 14 °dH. In domestic hot-water systems, we recommend that you keep the liquid temperature below 149 °F (65 °C)

  • Page 34: Electrical Data

    0.98 to 0.99, i.e. very close to 1. Wire-to-wire versions have no PFC and therefore the power factor is from 0.50 to 0.99. 4 to 10 W, depending on activity, i.e. reading the display, use of Grundfos GO, interaction with modules, etc.

  • Page 35: Construction

    MAGNA3 6. Construction MAGNA3 is of the canned-rotor type, i.e. the pump and Surface treatment motor form an integral unit without shaft seal and with The pump housing and pump head are electrocoated only two gaskets for sealing. The bearings are to improve corrosion resistance.
  • Page 36 MAGNA3 Sectional drawing Fig. 49 Terminal-connected version Fig. 50 Wire-to-wire-connected version Material specification See fig. 49. Pos. Component Material Grade Outer bearing ring Aluminium oxide Control box Polycarbonate Stator housing Aluminium O-rings EPDM Thrust bearing Aluminium oxide/carbon Bearing plate Stainless steel AISI 304 (EN 1.4301)

  • Page 37: Installation

    DC content occur. Insulating shells The insulating shells supplied with single-head MAGNA3 pumps are for heating systems and must be fitted as part of the installation. Note: Insulating shells are not available for twin-head pumps. Insulating shells increase the pump dimensions.

  • Page 38: Connection To Power Supply, Terminal-Connected Versions

    MAGNA3 Connection to power supply, terminal-connected versions GFCI Fig. 53 Example of a terminal-connected motor with main switch, backup fuse and additional protection GFCI Fig. 54 Example of electrical connections for models with wire-to-wire connections Use a suitable type of GFCI capable of handling ground fault currents with a DC content (pulsating DC).
  • Page 39 Analog input for an sensor, page 30. external For information on relay outputs, see Relay outputs, page 30. For details on how to install and operate the MAGNA3 pumps, please see the MAGNA3 model D - Installation net.grundfos.com/qr/i/99332342 and operating instructions:...

  • Page 40: Curve Conditions

    641/2009) which has been effective as from 1 January Fig. 58 QR code on the pump nameplate 2013. With Grundfos GO or a smartphone, you get the For MAGNA3 pumps, the average energy efficiency following information about MAGNA3: index (EEI) is 0.18 with values down to 0.17, categorized as best in class.

  • Page 41: Markings And Approvals

    MAGNA3 Markings and approvals The following marks are available after positive testing of MAGNA3: Mark Description Intertek - ETL Listed for USA and Canada Conforms to ANSI/UL Std. 778 Motor Operated Water Pumps Certified to CAN/CSA C22.2 No. 108 Liquid Pumps USA and Canada Applies to pumps with stainless steel pump housing (flange).

  • Page 42: Performance Curves And Technical Data

    Performance curves and technical data MAGNA3 9. Performance curves and technical data Conversion tables [ft] [psi] [US GPM] [l/s] [m³/h]...
  • Page 43 MAGNA3 Performance curves and technical data MAGNA3 32-60 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V 12 16 20 24 28 32 36 40 Q [US gpm]...
  • Page 44 Performance curves and technical data MAGNA3 MAGNA3 32-100 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] External setpoint influence shown with a...
  • Page 45 MAGNA3 Performance curves and technical data MAGNA3 40-80 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] External setpoint influence shown with a...
  • Page 46 Performance curves and technical data MAGNA3 MAGNA3 40-120 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V 0 10 20 30 40 50 60 70 80 90 100 110 120...
  • Page 47 MAGNA3 Performance curves and technical data MAGNA3 40-180 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] External setpoint influence shown with a...
  • Page 48 Performance curves and technical data MAGNA3 MAGNA3 50-80 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] External setpoint influence shown with a...
  • Page 49 MAGNA3 Performance curves and technical data MAGNA3 50-150 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V 80 100 120 140 160 180 Q [US gpm] 80 100 120 140 160 180...
  • Page 50 Performance curves and technical data MAGNA3 MAGNA3 65-120 F (N) 1 x 115, 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V 20 40 60 80 100 120 140 160 180 200 220...
  • Page 51 MAGNA3 Performance curves and technical data MAGNA3 65-150 F (N) 1 x 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] 1,400 1,400...
  • Page 52 Performance curves and technical data MAGNA3 MAGNA3 D 65-150 F 1 x 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volt* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] 4,000 1,400...
  • Page 53 MAGNA3 Performance curves and technical data MAGNA3 80-100 F (N) 1 x 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] 1,100 1,100...
  • Page 54 Performance curves and technical data MAGNA3 MAGNA3 D 80-100 F 1 x 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volt* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] 100 150 200 250 300 350 400 Q [US gpm]...
  • Page 55 MAGNA3 Performance curves and technical data MAGNA3 100-120 F (N) 1 x 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] Q [US gpm] Q [US gpm] 1,600 1,600...
  • Page 56 Performance curves and technical data MAGNA3 MAGNA3 D 100-120 F 1 x 230 V, 60 Hz Proportional pressure Constant pressure 0-10 volts* [ft] [ft] [ft] AUTO ADAPT 10 V Q [US gpm] 50 100 150 200 250 300 350 400 450...

  • Page 57: Accessories

    CIM modules, see the CIM documentation available in Grundfos Product Center. Location of CIM module Fig. 59 Fitting the insulating shells to a MAGNA3 pump The CIM module is fitted behind the front cover. See fig. 60. Note: The dimensions of the insulating shells for air-conditioning and cooling systems differ from those of the insulating shells for heating systems.

  • Page 58: Grundfos Go

    You can reuse a CIM module in a CIU unit used MI 301 is a module with built-in infrared and radio together with Grundfos MAGNA in MAGNA3. You must communication. Use MI 301 in conjunction with an re-configure the CIM module before you use it in a Android or iOS-based smart device with a Bluetooth MAGNA3 pump.

  • Page 59: External Grundfos Sensors

    0-232 14 to 248 RPI T2 Grundfos 0-10 16.6-30 G 1/2 98355521 temperature sensor (0-16) (-10 to +120) Note: MAGNA3 has only one analog input. Pressure sensor Measuring Measuring Transmitter output Power supply Process Sensor Type range range Product number...

  • Page 60: Cable For Sensors

    Fig. 65 Position of a blanking flange Pump type Product number MAGNA3 D 65-150 F MAGNA3 D 80-100 F 98159372 MAGNA3 D 100-120 F...

  • Page 61: Pipe Connections

    MAGNA3 Pipe connections Material Flange Description Part number 3/4" NPT flange fitting set 519601 1" NPT flange fitting set 519602 GF 15/26 flange 1-1/4" NPT flange fitting set 519603 1-1/2" NPT flange fitting set 519604 GF 40/43 flange 1-1/2" NPT flange fitting set...

  • Page 62: Product Numbers

    98126863 MAGNA3 D 80-100 F 14 - 3/16 (360) PN 12 98126864 MAGNA3 D 100-120 F 17 - 3/4 (450) PN 12 98126865 Note: Click on the product number and go directly to the performance curve in Grundfos Product Center.

  • Page 63: Grundfos Product Center

    MAGNA3 12. Grundfos Product Center Online search and sizing tool to help you make the right choice. http://product-selection.grundfos.com "SIZING" enables you to "REPLACEMENT" enables you to find a size a pump based on replacement product. entered data and Search results will include information on selection choices.
  • Page 64 99332363 0718 ECM: 1240096 Grundfos Kansas City 17100 West 118th Terrace Olathe, Kansas 66061 Phone: 913-227-3400 Fax: 913-227-3500 www.grundfos.us Grundfos Canada 2941 Brighton Road Oakville, Ontario L6H 6C9 Canada Phone: +1-905-829-9533 Fax: +1-905-829-9512 www.grundfos.ca Grundfos México Boulevard TLC No. 15 Parque Industrial Stiva Aeropuerto C.P.

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