New MAGNA1 Model C Installation and Operating Instructions

Original Installation and Operating Instructions

These installation and operating instructions describe New MAGNA1 model C.

Sections 1-5 give the information necessary to be able to unpack, install and start up the product in a safe way.

Sections 6-11 give important information about the product, as well as information on service, fault finding and disposal of the product.

CONTENTS

General Information

1.1 Hazard Statements

Read this document and the quick guide before installing the product. Installation and operation must comply with local regulations and accepted codes of good practice.

This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

DANGER

Indicates a hazardous situation which, if not avoided, will result in death or serious personal injury.

WARNING

Indicates a hazardous situation which, if not avoided, could result in death or serious personal injury.

CAUTION

Indicates a hazardous situation which, if not avoided, could result in minor or moderate personal injury.

The text accompanying the three hazard symbols DANGER, WARNING and CAUTION is structured in the following way:

SIGNAL WORD

Description of hazard

Consequence of ignoring the warning.

Action to avoid the hazard.

The hazard statements are structured in the following way:

1.2 Notes

The symbols and notes below may appear in Grundfos installation and operating instructions, safety instructions and service instructions.

• ⚡ Observe these instructions for explosion-proof products.
• ? A blue or grey circle with a white graphical symbol indicates that an action must be taken.
• ? A red or grey circle with a diagonal bar, possibly with a black graphical symbol, indicates that an action must not be taken or must be stopped.
• ? Tips and advice that make the work easier.

1.3 Symbols on the product

Check the position of the clamp before you tighten it. Incorrect position of the clamp will cause leakage from the pump and damage the hydraulic parts in the pump head.

Fit and tighten the screw holding the clamp to 8 Nm ± 1 Nm.

Do not apply more torque than specified even though water is dripping from the clamp. The condensed water is most likely coming from the drain hole under the clamp.

2. Receiving the product

2.1 Inspecting the product

Check that the product is in accordance with the order. Check that the voltage and frequency of the product match the voltage and frequency of the installation site. See section 6.4.1 Nameplate.

Pumps tested with water containing anticorrosive additives are taped on the inlet and outlet ports to prevent residual test water from leaking into the packaging. Remove the tape before installing the pump.

2.2 Scope of delivery

2.2.1 Plug-connected single-head pump

The box contains the following items:

• MAGNA1 pump
• insulating shells
• gaskets
• quick guide
• safety instructions
• one ALPHA plug.

[Image: Illustration of a plug-connected single-head MAGNA1 pump]

2.2.2 Plug-connected twin-head pump

The box contains the following items:

• MAGNA1 pump
• gaskets
• quick guide
• safety instructions
• two ALPHA plugs.

[Image: Illustration of a plug-connected twin-head MAGNA1 pump]

2.3 Lifting the product

Observe local regulations concerning limits for manual lifting or handling.

Always lift directly on the pump head or the cooling fins when handling the pump. See fig. 5. For large pumps, it may be necessary to use lifting equipment. Position the lifting straps as illustrated in fig. 5.

[Image: Illustration showing correct lifting of a MAGNA1 pump using straps on the pump head and cooling fins]

Do not lift the pump head by the control box, i.e. the red area of the pump. See fig. 6.

[Image: Illustration showing incorrect lifting of a MAGNA1 pump by the control box, marked with a red X]

3. Installing the product

3.1 Location

The pump is designed for indoor installation.

Always install the pump in a dry environment where it will not be exposed to drops or splashes, for example water, from surrounding equipment or structures.

As the pump contains stainless-steel parts, it is important that it is not installed directly in environments, such as:

• Indoor swimming pools where the pump would be exposed to the ambient environment of the pool.
• Locations with direct and continuous exposure to a marine atmosphere.
• In rooms where hydrochloric acid (HCl) can form acidic aerosols escaping from, for example, open tanks or frequently opened or vented containers.

The above applications do not disqualify for installation of MAGNA1. However, it is important that the pump is not installed directly in these environments.

Stainless-steel variants of MAGNA1 can be used to pump pool water. See section 6.3 Pumped liquids.

To ensure adequate cooling of the motor and electronics, observe the following requirements:

• Position the pump in such a way that sufficient cooling is ensured.
• The ambient temperature must not exceed 40 °C.

3.2 Tools

[Image: Illustrations of various tools: straight slot screwdriver, torx bits, hexagon key, side cutter, open-end spanner]

3.3 Insulating shells

Insulating shells limit the heat loss from the pump housing and pipes. Insulating shells are available for single-head pumps only.

3.3.1 Heating systems

Insulating shells increase the pump dimensions.

Insulating shells for pumps in heating systems are factory-fitted with the pump. Remove the insulating shells before you install the pump. See fig. 8.

[Image: Illustration showing the removal of insulating shells from a MAGNA1 pump]

3.3.2 Cooling systems

Insulating shells for pumps in air-conditioning and cooling systems, down to -10 °C, are available as accessories and must be ordered separately. See section 6.8.2 Insulating kits for air-conditioning and cooling systems.

3.3.3 Insulating the pump

As an alternative to insulating shells, you can insulate the pump housing and pipes as illustrated in fig. 9.

In heating systems, do not insulate the control box or cover the operating panel.

[Image: Illustration showing insulation of the pump housing and pipe in a heating system]

3.4 Mechanical installation

Install the pump so that it is not stressed by the pipes. For maximum permissible forces and moments from pipe connections acting on the pump flanges, see page 40.

You can suspend the pump directly in the pipes, provided that the pipes support the pump.

Twin-head pumps are prepared for installation on a mounting bracket or base plate.

3.4.1 Pump positions

Always install the pump with horizontal motor shaft.

• Pump installed correctly in a vertical pipe. See fig. 10, pos. A.
• Pump installed correctly in a horizontal pipe. See fig. 10, pos. B.
• Do not install the pump with vertical motor shaft. See fig. 10, pos. C and D.

[Image: Diagram showing four possible pump installation orientations labeled A, B, C, D, with A and B marked as correct for horizontal motor shaft and C and D marked as incorrect.]

Twin-head pumps installed in horizontal pipes can be fitted with an automatic vent, Rp 1/4" thread, in the upper part of the pump housing if no venting valve is installed in the system. See fig. 12.

[Image: Illustration of a twin-head pump with an automatic vent installed]

3.4.2 Control box positions

To ensure adequate cooling, make sure that the control box is in horizontal position with the Grundfos logo in vertical position. See fig. 11.

Make sure that the isolating valves are closed before rotating the control box.

[Image: Illustration of a MAGNA1 pump with the control box in the correct horizontal position, showing the Grundfos logo upright.]

3.4.3 Pump head position

If you remove the pump head before installing the pump in the pipes, pay special attention when fitting the pump head to the pump housing:

1. Visually check that the floating ring in the sealing system is centred. See figs 13 and 14.
2. Gently lower the pump head with the rotor shaft and impeller into the pump housing.
3. Make sure that the contact face of the pump housing and that of the pump head are in contact before you tighten the clamp. See fig. 15.

[Image: Illustration showing a correctly centered sealing system with a checkmark ✔️]

[Image: Illustration showing an incorrectly centered sealing system with a cross ❌]

[Image: Illustration showing the correct fitting of the pump head to the pump housing, with a checkmark ✔️, and an incorrect fitting with a cross ❌. Also shows a clamp being tightened to 8 Nm ± 1 Nm.]

Check the position of the clamp before you tighten it. Incorrect position of the clamp will cause leakage from the pump and damage the hydraulic parts in the pump head. See fig. 15.

3.4.4 Changing the control box position

The warning symbol on the clamp holding the pump head and pump housing together indicates that there is a risk of personal injury. See specific warnings below.

CAUTION Pressurised system Minor or moderate personal injury - Pay special attention to any escaping vapour when loosening the clamp.

CAUTION Crushing of feet Minor or moderate personal injury - Do not drop the pump head when loosening the clamp.

Fit and tighten the screw holding the clamp to 8 Nm ± 1 Nm. Do not apply more torque than specified even though water is dripping from the clamp. The condensed water is most likely coming from the drain hole under the clamp.

Check the position of the clamp before you tighten it. Incorrect position of the clamp will cause leakage from the pump and damage the hydraulic parts in the pump head.

Make sure that the isolating valves are closed before rotating the control box.

3.5 Electrical connection

Carry out the electrical connection and protection according to local regulations.

Check that the supply voltage and frequency correspond to the values stated on the nameplate.

WARNING Electric shock Death or serious personal injury - Lock the main switch in position 0. Type and requirements as specified in EN 60204-1, 5.3.2.

WARNING Electric shock Death or serious personal injury - Connect the pump to an external main switch with a minimum contact gap of 3 mm in all poles. - Use earthing or neutralisation for protection against indirect contact. - If a plug-connected pump is connected to an electric installation where an electrical circuit breaker (voltage sensing ELCB, residual-current device RCD or residual-current circuit device RCCB) is used as an additional protection, this circuit breaker must be marked with the first or both of the symbols shown below. If the pump is terminal-connected, the circuit breaker must be marked with both of the symbols below.

• Make sure that the pump is connected to an external main switch.
• The pump requires no external motor protection.
• The motor incorporates thermal protection against slow overloading and blocking.
• When switched on via the power supply, the pump starts after approximately 5 seconds.

3.5.1 Supply voltage

1 x 230 V ± 10 %, 50/60 Hz, PE.

The voltage tolerances are intended for mains-voltage variations. Do not use the voltage tolerances for running pumps at other voltages than those stated on the nameplate.

3.5.2 Wiring diagrams

[Image: Wiring diagram for a plug-connected motor with main switch, fuse, and RCD/RCCB]

[Image: Wiring diagram for a mains-connected motor with main switch, fuse, and RCD/RCCB]

[Image: Illustration showing connection terminals for external control on a MAGNA1 pump, labeled 1 and 2]

WARNING Electric shock Minor or moderate personal injury - Separate wires connected to supply terminals, outputs NC, C and start-stop input from each other and from the supply by means of reinforced insulation.

• Make sure that the fuse is dimensioned according to the nameplate and local regulations.
• Connect all cables in accordance with local regulations.
• Make sure that all cables are heat-resistant up to 75 °C.
• Install all cables in accordance with EN 60204-1 and EN 50174-2:2000.

3.5.3 Connection to the power supply, plug-connected versions

Disassembling the plug

3.5.4 Connection to the power supply, terminal-connected version

3.5.5 Connecting the digital input

The example is based on a MAGNA1 terminal-connected version. The connection terminals of plug-connected versions differ from those of terminal-connected versions, but they have the same function and connection options. See sections 3.5.2 Wiring diagrams and 8.4 Communication, control and monitoring.

3.5.6 Connecting the fault relay output

4. Starting up the product

4.1 Single-head pump

In order to protect the electronics, the number of starts and stops must not exceed four times per hour.

Do not start the pump until the system has been filled with liquid and vented. Furthermore, the required minimum inlet pressure must be available at the pump inlet. See section 10. Technical data.

The pump is self-venting through the system, and the system must be vented at the highest point.

4.2 Twin-head pump

Make sure that both pump heads are powered on.

The pumps are paired from factory. When switching on the power supply, the heads will establish connection, which is indicated by a green light in the centre of Grundfos Eye. Please allow approximately 5 seconds for this to happen.

If one of the pump heads is turned off, the pump with power will show a yellow indicator light, warning 77, see section 9. Fault finding the product. In that case, power up the switched off pump. Once both pumps are on, the pumps will establish connection and the warning deactivates.

See sections 8.4.1 Digital input (Start/Stop), 8.4.2 Fault relay output and 8.4.3 Twin-head pump function for additional twin-head pump setup options.

4.3 Pairing and unpairing twin-head pumps

The pumps are paired from factory, however, it can be useful to know how to pair the system e.g. for service purposes. The pumps can also be unpaired.

When you have paired the pumps, you must wait 10 seconds before unpairing.

4.3.1 Pairing

The master pump head is the one from which you initiate the pairing.

4.3.2 Unpairing

5. Handling and storing the product

If the pump is not used during periods of frost, add antifreeze or let the pump run in regular intervals to prevent frost bursts.

Observe local regulations concerning limits for manual lifting or handling.

Always lift directly on the pump head or the cooling fins when handling the pump. For large pumps, it may be necessary to use lifting equipment. See section 2.3 Lifting the product.

6. Product introduction

6.1 Product description

Grundfos MAGNA1 is a complete range of circulator pumps with integrated controller enabling adjustment of pump performance to the actual system requirements. In many systems, this reduces the power consumption considerably, reduces noise from thermostatic radiator valves and similar fittings and improves the control of the system.

You can set the desired head on the operating panel.

6.2 Intended use

The pump is designed for circulating liquids in the following systems:

• heating systems
• domestic hot-water systems
• air-conditioning and cooling systems.

You can also use the pump in the following systems:

• ground-source heat-pump systems
• solar-heating systems.

6.3 Pumped liquids

The pump is suitable for thin, clean, non-aggressive and non-explosive liquids, not containing solid particles or fibres that may attack the pump mechanically or chemically.

In heating systems, the water must meet the requirements of accepted standards on water quality in heating systems, for example the German standard VDI 2035.

The pump is also suitable for domestic hot-water systems.

Observe local regulations regarding pump-housing material.

Stainless-steel variants of MAGNA1 can be used to pump pool water with one of the following properties:

• Chloride (Cl-) ≤ 150 mg/l and free chlorine ≤ 1.5 mg/l at temperatures ≤ 30 degrees Celsius
• Chloride (Cl-) ≤ 100 mg/l and free chlorine ≤ 1.5 mg/l at temperatures from 30 to 40 degrees Celsius.

We strongly recommend that you use stainless-steel pumps in domestic hot-water applications to avoid corrosion.

In domestic hot-water systems, we recommend that you use the pump 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 65 °C to eliminate the risk of lime precipitation.

Do not pump flammable, combustible or explosive liquids.

6.3.1 Glycol

You can use the pump for pumping water-ethylene-glycol mixtures up to 50 %.

Example of a water-ethylene-glycol mixture: Maximum viscosity: 50 cSt ~ 50% water and 50% glycol mixture at -10 °C.

The pump has a power-limiting function that protects it against overload.

The pumping of glycol mixtures affects the maximum curve and reduces the performance, depending on the water-ethylene-glycol mixture and the liquid temperature.

To prevent the glycol mixture from degrading, avoid temperatures exceeding the rated liquid temperature and minimise the operating time at high temperatures.

Clean and flush the system before you add the glycol mixture.

To prevent corrosion or lime precipitation, maintain the glycol mixture regularly. If further dilution of the supplied glycol is required, follow the glycol supplier's instructions.

Additives with a density or kinematic viscosity higher than water reduces the hydraulic performance.

[Image: Illustration showing pump with labels Max. 95% RH and IPX4D]

Do not pump aggressive liquids.

6.4 Identification

6.4.1 Nameplate

[Image: Illustration of a MAGNA1 nameplate with numbered fields]

* Example of production code: 1326. The pump was produced in week 26, 2013.

[Image: Illustration of a product box showing a QR code and Grundfos branding]

6.4.2 Type key

6.5 Radio communication

MAGNA1 single-head pumps are designed for infrared communication (IR) with Grundfos GO Remote, while MAGNA1 twin-head pumps can also communicate via radio.

6.6 Non-return valve

If a non-return valve is fitted in the pipe system, ensure that the set minimum outlet pressure of the pump is always higher than the closing pressure of the valve. See fig. 22. This is especially important in proportional-pressure control mode with reduced head at a low flow rate.

[Image: Schematic diagram of a pipe system with a pump and a non-return valve]

6.7 Closed valve operation

MAGNA1 pumps can operate at any speed against a closed valve for several days without damage to the pump. However, Grundfos recommends to operate at the lowest possible speed curve to minimize energy losses. There are no minimum flow requirements.

Do not close inlet and outlet valves simultaneously, always keep one open when the pump is running. Media- and ambient temperatures must never exceed the specified temperature range.

6.8 Accessories

6.8.1 Insulating shells for heating systems

Insulating shells are available for single-head pumps only and are supplied with the pump.

Insulating shells increase the pump dimensions.

6.8.2 Insulating kits for air-conditioning and cooling systems

Insulating shells for pumps in air-conditioning and cooling systems, down to -10 °C, are available as accessories and must be ordered separately. A kit consists of two shells made of polyurethane and a self-adhesive seal to ensure tight assembly.

Insulating shells increase the pump dimensions. The dimensions of the insulating shells for pumps in air-conditioning and cooling systems differ from those of the insulating shells for pumps in heating systems.

The insulating kit also fits stainless-steel versions (N).

6.8.3 Blanking flanges

A blanking flange is used to blank off the opening when one of the pump heads of a twin-head pump is removed for service to enable uninterrupted operation of the other pump.

[Image: Illustration showing the position of a blanking flange on a pump]

6.8.4 Counterflanges

Counterflange kits consist of two flanges, two gaskets and bolts and nuts, making it possible to install the pump in any pipes. See New MAGNA1 model C data booklet, Accessories section, for the right dimension and product number.

7. Control functions

Factory setting: Intermediate proportional-pressure curve, referred to as PP2.

7.1 Proportional-pressure curve (PP1, PP2 or PP3)

Proportional-pressure control adjusts the pump performance to the actual flow rate demand in the system, but the pump performance follows the selected performance curve, PP1, PP2 or PP3. See fig. 26 where PP2 has been selected.

[Image: Graph showing three proportional-pressure curves labeled PP1, PP2, PP3 against flow rate (Q) and head (H)]

The selection of the right proportional-pressure setting depends on the characteristics of the system in question and the actual flow rate demand. For further information, see section 7.4 Overview of the control functions and 7.5 Selecting control function.

7.2 Constant-pressure curve (CP1, CP2 or CP3)

Constant-pressure control adjusts the pump performance to the actual flow rate demand in the system, but the pump performance follows the selected performance curve, CP1, CP2 or CP3. See fig. 27 where CP1 has been selected.

[Image: Graph showing three constant-pressure curves labeled CP1, CP2, CP3 against flow rate (Q) and head (H)]

The selection of the right constant-pressure setting depends on the characteristics of the system in question and the actual flow rate demand. For further information, see section 7.4 Overview of the control functions and 7.5 Selecting control function.

7.3 Constant curve (I, II or III)

At constant-curve operation, the pump runs at a constant speed, independently of the actual flow rate demand in the system. The pump performance follows the selected performance curve, I, II or III. See fig. 28 where II has been selected.

[Image: Graph showing three constant curves labeled I, II, III against flow rate (Q) and head (H)]

The selection of the right constant-curve setting depends on the characteristics of the system in question. For further information, see section 7.4 Overview of the control functions and 7.5 Selecting control function.

7.4 Overview of the control functions

[Image: Diagram illustrating control functions in relation to system requirements, showing curves PP1, PP2, PP3, CP1, CP2, CP3 and speeds I, II, III]

7.5 Selecting control function

8. Setting the product

8.1 Operating panel

CAUTION Hot surface Minor or moderate personal injury - To avoid burns only touch the operating panel.

[Image: Illustration of the MAGNA1 operating panel with numbered components: 1. Infrared receiver, 2. Grundfos Eye, 3. Infrared receiver, 4. LEDs, 5. Push-button]

8.2 Setting the control function

The pump has nine control functions, see section 7. Control functions. Select the control function by pressing the push-button on the operating panel, see fig. 30, pos. 5. The control function is indicated by eight different light fields in the display.

8.2.1 Adjusting the proportional pressure using Grundfos GO Remote

The setpoint of the proportional-pressure curve can be adjusted using Grundfos GO Remote.

Adjusting the proportional pressure is only possible in proportional pressure mode.

For instructions on how to connect the pump to Grundfos GO Remote, see section 8.3 Connecting the pump to Grundfos GO Remote.

8.3 Connecting the pump to Grundfos GO Remote

MAGNA1 single-head pumps are designed for infrared communication (IR) with Grundfos GO Remote, while MAGNA1 twin-head pumps can also communicate via radio.

Before connecting to Grundfos GO Remote

To use Grundfos GO Remote together with MAGNA1 make sure to have the following ready:

• For IR communication: A Grundfos GO add-on module, which is available as an accessory. See section 6.8.5 Grundfos GO Remote. See the separate installation and operating instructions for the desired type of Grundfos GO setup.
• The Grundfos GO Remote app downloaded to your smart device. Grundfos GO Remote is available in Apple App Store and Google Play.

Connecting to Grundfos GO Remote

To connect to Grundfos GO Remote, do as follows:

1. For IR communication: Establish a connection between the Grundfos GO add-on module and your smart device. See the separate installation and operating instructions.
2. Open the Grundfos GO Remote app and select either IR or radio communication depending on the pump type and chosen communication method. Make sure to point Grundfos GO at the receiver placed left or right to Grundfos Eye depending on your pump model. See fig. 31.

[Image: Diagram showing IR communication setup with Grundfos GO module, smart device, and pump, indicating minimum distance and angle. Also shows plug-connected vs. terminal-connected versions.]

8.3.1 Using Grundfos GO Remote

[Image: Screenshot of the Grundfos GO Remote dashboard with numbered elements]

When using Grundfos GO in a multipump setup and choosing "system view", Grundfos Eye, pos. 2, fig. 32, will indicate the system's operating status and not the status of the pump itself. See section 9.1.1 Multipump system operating indications.

8.3.2 "Status" menu

The "Status" menu gives an overview of the pump's current operating status. To access the menu, connect the pump to Grundfos GO. See section 4.3 Pairing and unpairing twin-head pumps, and choose the "Status" menu from the dashboard.

[Image: Screenshot of the Grundfos GO Remote 'Status' menu showing estimated flow rate, head, speed, power consumption, energy consumption, operating hours, and number of starts]

8.3.3 "Settings" menu

The "Settings" menu allows you to:

• Adjust the proportional pressure, see section 8.2.1 Adjusting the proportional pressure using Grundfos GO Remote for instructions.
• Configure the Warning 77 relay setting, see section 9.5.1 Activating and deactivating the fault relay for instructions.

[Image: Screenshot of the Grundfos GO Remote 'Settings' menu showing Setpoint and Warning 77 relay settings]

8.3.4 "Alarms and warnings" menu

This menu lets you read out alarm codes and text. A log history of previous alarms and warnings is also available.

[Image: Screenshot of the Grundfos GO Remote 'Alarms and warnings' menu showing Alarm code 10, Warning code 0, and a Reset alarm button]

For more information on warnings and alarms, see section 9. Fault finding the product.

You can also reach the menu by tapping Grundfos Eye on the dashboard, see pos. 2, fig. 32.

8.4 Communication, control and monitoring

MAGNA1 enables external control and monitoring via the Start/Stop input, see section 8.4.1 Digital input (Start/Stop), and the fault relay output, see section 8.4.2 Fault relay output, on both single and twin-head pumps. In addition, the wireless communication feature in twin-head pumps lets you use the pump without an external controller, see section 8.4.3 Twin-head pump function.

8.4.1 Digital input (Start/Stop)

To use the digital input, connect the control wires to terminals Start/Stop (S/S) and frame ( ). If no external on and off switch is connected, maintain the jumper between terminals Start/Stop (S/S) and frame ( ). This connection is the factory setting.

[Image: Illustration showing digital input terminals in the control box for plug-connected and terminal-connected versions]

Digital input on twin-head pumps

The Start/Stop input operates on system level, meaning that if the master pump head receives a stop signal, the system stops.

As a main rule the digital input is only effective on the master, which is why it is important to know which pump is assigned as the master, see fig. 37.

[Image: Illustration of a pump nameplate highlighting the master pump identification]

For redundancy purposes, the digital input can be used concurrent on the slave pump head. However, as long as the master is powered up, the input on the slave will be ignored. In the event of power loss on the master, the digital input of the slave will take over. When the master pump head is back on, the master takes over and controls the slave.

Plug-connected versions, pos. A, fig. 36:

When using a shielded cable, connect the shield in the frame terminal ( ) together with the frame connection cord.

For instructions on how to connect to the Start/Stop input, see section 3.5.5 Connecting the digital input.

8.4.2 Fault relay output

The fault relay has a potential-free changeover contact for external fault indication. See section 3.5.2 Wiring diagrams.

It is possible to use the relay output as part of a control strategy or for monitoring. For example, if the pump experiences a fault, the fault relay sends a signal to the controller, which will subsequently trigger further events depending on your chosen strategy. In order to use the fault relay output, follow the instructions in fig. 38.

The relay can be used for outputs up to 250 V and 2 A.

Factory settings of the relay:

The functions of the fault relay are as shown in the table:

For instructions on how to connect to the fault relay output, see section 3.5.6 Connecting the fault relay output.

Fault relay output in twin-head pumps

The fault relay output on each pump head operates independently, meaning that if a fault occurs in one of the pumps its respective relay is triggered.

8.4.3 Twin-head pump function

The twin-head pump function allows you to use twin-head pumps without an external controller, as the two pump heads communicate via wireless connection.

Operating mode

The pumps are operating in alternating mode, meaning that only one pump is running at a time. The two pumps change from one pump to the other every 24 hours with a tolerance of ± 0.5% per day.

To control the twin-head pump via the digital Start/Stop input, see section 8.4.1 Digital input (Start/Stop).

To monitor the twin-head pump via the fault relay output, see section 3.5.6 Connecting the fault relay output.

9. Fault finding the product

9.1 Grundfos Eye operating status

Grundfos Eye is on when you switch on the power supply. Grundfos Eye is an indicator light providing information about the actual pump status. A fault is indicated by a yellow or red indicator light in Grundfos Eye on the operating panel and in Grundfos GO Remote.

The indicator light flashes in different sequences and provides information about the following:

If the pump impeller is rotated, for example when filling the pump with water, sufficient energy may be generated to light up the operating panel even if the power supply has been switched off.

9.1.1 Multipump system operating indications

When connecting Grundfos GO Remote to a multipump setup and choosing "system view", Grundfos GO Remote will indicate the system's operating status and not the status of the pump itself. Therefore the indicator light in Grundfos GO Remote might differ from the indicator light shown on the pump's operating panel. See the table below.

9.2 Resetting a fault indication

To reset a fault indication, eliminate the fault cause, see section 9.4 Fault finding table, and reset the pump by pressing the button on the pump. If the pump does not revert to normal duty, the fault cause is not eliminated.

If the fault disappears by itself, the fault indication is automatically reset.

A fault can also be reset by using Grundfos GO Remote. See section 9.3 Reading out warning and alarm codes in Grundfos GO Remote.

CAUTION Pressurised system Minor or moderate personal injury - Before dismantling the pump, drain the system or close the isolating valve on either side of the pump. The pumped liquid may be scalding hot and under high pressure.

WARNING Electric shock Death or serious personal injury - Switch off the power supply for at least 3 minutes before you start any work on the product. Lock the main switch in position 0. Type and requirements as specified in EN 60204-1, 5.3.2.

WARNING Electric shock Death or serious personal injury - Make sure that other pumps or sources do not force flow through the pump even if the pump is stopped.

If the power cable is damaged, it must be replaced by the manufacturer, the manufacturer's service partner or a similarly qualified person.

9.3 Reading out warning and alarm codes in Grundfos GO Remote

To read out alarm codes and text, connect the pump to Grundfos GO Remote and navigate to the "Alarms and warnings" menu. Grundfos Eye in the dashboard indicates the warning or alarm.

When connecting Grundfos GO to one of the pumps of a twin-head pump, Grundfos GO reads out alarm codes and texts for that pump. If you want to see alarms and warnings for the other pump, connect to this instead.

An overview of warnings and alarms is also available in section 9.4 Fault finding table.

For instructions on how to connect the pump to Grundfos GO, see section 8.3 Connecting the pump to Grundfos GO Remote.

9.4 Fault finding table

9.5 Warning 77, twin-head pump

A yellow Grundfos Eye in a twin-head pump system often means that the two heads have lost connection to each other, warning 77. This is often intermittent and caused by external disturbance, or because one of the heads has lost power.

The warning is shown immediately and triggers the fault relay after one hour. If communication is re-established, the warning is automatically reset.

9.5.1 Activating and deactivating the fault relay

It is possible to choose whether warning 77 should trigger the fault relay or not. This is done in Grundfos GO. For instructions on how to connect the pump to Grundfos GO, see section 8.3 Connecting the pump to Grundfos GO Remote.

10. Technical data

Supply voltage

1 x 230 V ± 10 %, 50/60 Hz, PE.

Motor protection

The pump requires no external motor protection.

Enclosure class

IPX4D (EN 60529).

Insulation class

F.

Relative humidity

Maximum 95 %.

Ambient temperature

0 to 40 °C. During transport: -40 to +70 °C.

Temperature class

TF110 (EN 60335-2-51).

Liquid temperature

Continuously: -10 to +110 °C.

Stainless steel pumps in domestic hot-water systems:

In domestic hot-water systems, we recommend that you keep the liquid temperature below 65 °C to eliminate the risk of lime precipitation.

Maximum system pressure

The actual inlet pressure and the pump pressure against a closed valve must be lower than the maximum permissible system pressure.

The maximum permissible system pressure is stated on the pump nameplate:

• PN 6: 6 bar or 0.6 MPa
• PN 10: 10 bar or 1.0 MPa
• PN 16: 16 bar or 1.6 MPa.

Test pressure

The pumps can withstand test pressures as indicated in EN 60335-2-51.

• PN 6: 7.2 bar
• PN 10: 12 bar
• PN 6/10: 12 bar
• PN 16: 19.2 bar.

During normal operation, do not use the pump at higher pressures than those stated on the nameplate. See fig. 20.

The pressure test has been made with water containing anti-corrosive additives at a temperature of 20 °C.

Minimum inlet pressure

The following relative minimum inlet pressure must be available at the pump inlet during operation to avoid cavitation noise and damage to the pump bearings.

The values in the table below apply to single-head pumps and twin-head pumps in single-head operation.

In the case of twin-head operation, increase the required relative inlet pressure by 0.1 bar or 0.01 MPa compared to the stated values for single-head pumps or twin-head pumps in single-head operation.

The relative minimum inlet pressures apply to pumps installed up to 300 metres above sea level. For altitudes above 300 metres, increase the required relative inlet pressure by 0.01 bar or 0.001 MPa per 100 metres altitude. The pump is only approved for an altitude of maximum 2000 metres above sea level.

Sound pressure level

The sound pressure level of the pump is dependent on the power consumption. Levels are determined in accordance with ISO 3745 and ISO 11203, method Q2.

Leakage current

The mains filter will cause a leakage current to earth during operation. The leakage current is less than 3.5 mA.

Power factor

The terminal-connected versions have a built-in active power-factor correction which gives a cos φ from 0.98 to 0.99.

The plug-connected versions have a built-in passive power-factor correction with coil and resistors which ensure that the current drawn from the grid is in phase with the voltage and that the current is approximately sinusoidal which gives a cos φ from 0.55 to 0.98.

Input and output communication

11. Disposing of the product

This product has been designed with focus on the disposal and recycling of materials. The following average disposal values apply to all variants of MAGNA1 pumps:

• 85 % recycling
• 10 % incineration
• 5 % depositing.

This product or parts of it must be disposed of in an environmentally sound way:

1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company or service workshop.

? The crossed-out wheelie bin symbol on a product means that it must be disposed of separately from household waste. When a product marked with this symbol reaches its end of life, take it to a collection point designated by the local waste disposal authorities. The separate collection and recycling of such products will help protect the environment and human health.

See also end-of-life information at www.grundfos.com/product-recycling.

WARNING Magnetic field Death or serious personal injury - Persons with pacemakers disassembling this product must exercise care when handling the magnetic materials embedded in the rotor.

Appendix

1. Dimensions, threaded versions

[Image: Diagram showing dimensions for single-head pump, threaded version, with labels L1, L5, L6, B1, B2, B4, B6, B7, H1, H2, H3, H4, D1, G]

[Image: Diagram showing dimensions for twin-head pump, threaded version, with labels B3, L7, L5, M3, D1, G, H3, H1, H2, B1, B5, B4, L1]

2. Dimensions, flanged versions

[Image: Diagram showing dimensions for single-head pump, plug-connected versions, flanged version, with labels B1, B2, B4, B6, B7, H1, H2, H3, D1, D2, D3, D4, D5, M3]

3. Forces and moments

Maximum permissible forces and moments from the pipe connections acting on the pump flanges are indicated in fig 7.

[Image: Diagram showing forces (Fx, Fy, Fz, ΣEb) and moments (Mx, My, Mz, ΣMb) acting on pump flanges]

* The values also apply to pumps with threaded connection.

The above values apply to cast-iron versions. For stainless-steel versions, the values can be multiplied by two according to the ISO 5199 standard.

4. Tightening torques for bolts

Recommended tightening torques for bolts used in flanged connections:

Grundfos companies

This section lists Grundfos companies worldwide. For brevity, only a few key entries are shown here. Please refer to the original document for the complete list.

Argentina

Bombas GRUNDFOS de Argentina S.A.
Ruta Panamericana km. 37.500 Centro Industrial Garin
1619 Garín Pcia. de B.A.
Phone: +54-3327 414 444
Telefax: +54-3327 45 3190

Australia

GRUNDFOS Pumps Pty. Ltd.
P.O. Box 2040
Regency Park
South Australia 5942
Phone: +61-8-8461-4611
Telefax: +61-8-8340 0155

Austria

GRUNDFOS Pumpen Vertrieb Ges.m.b.H.
Grundfosstraße 2
A-5082 Grödig/Salzburg
Tel.: +43-6246-883-0
Telefax: +43-6246-883-30

Belgium

N.V. GRUNDFOS Bellux S.A.
Boomsesteenweg 81-83
B-2630 Aartselaar
Tél.: +32-3-870 7300
Télécopie: +32-3-870 7301

Belarus

Представительство ГРУНДФОС В Минске
220125, Минск
ул. Шафарнянская, 11, оф. 56, БЦ «Порт»
Тел.: +7 (375 17) 286 39 72/73
Факс: +7 (375 17) 286 39 71
E-mail: minsk@grundfos.com

Bosnia and Herzegovina

GRUNDFOS Sarajevo
Zmaja od Bosne 7-7A,
BH-71000 Sarajevo
Phone: +387 33 592 480
Telefax: +387 33 590 465
www.ba.grundfos.com
e-mail: grundfos@bih.net.ba

Brazil

BOMBAS GRUNDFOS DO BRASIL
Av. Humberto de Alencar Castelo Branco, 630
CEP 09850 - 300
São Bernardo do Campo - SP
Phone: +55-11 4393 5533
Telefax: +55-11 4343 5015

Denmark

GRUNDFOS DK A/S
Martin Bachs Vej 3
DK-8850 Bjerringbro
Tlf.: +45-87 50 50 50
Telefax: +45-87 50 51 51
E-mail: info_GDK@grundfos.com
www.grundfos.com/DK

France

Pompes GRUNDFOS Distribution S.A.
Parc d'Activités de Chesnes
57, rue de Malacombe
F-38290 St. Quentin Fallavier (Lyon)
Tél.: +33-4 74 82 15 15
Télécopie: +33-4 74 94 10 51

Germany

GRUNDFOS GMBH
Schlüterstr. 33
40699 Erkrath
Tel.: +49-(0) 211 929 69-0
Telefax: +49-(0) 211 929 69-3799
e-mail: infoservice@grundfos.de
Service in Deutschland:
e-mail: kundendienst@grundfos.de

U.S.A.

GRUNDFOS Pumps Corporation
9300 Loiret Blvd.
Lenexa, Kansas 66219
Phone: +1-913-227-3400
Telefax: +1-913-227-3500

Addresses Revised 15.01.2019