Grundfos MAGNA3 E Manual

Original safety instructions

These safety instructions give a quick overview of the safety precautions to be taken in connection with any work
Observe these safety instructions during handling, installation, operation, maintenance, service and repair of this
These safety instructions are a supplementary document, and all safety instructions will appear again in the relevant sections of the installation and operating instructions.
Keep these safety instructions at the installation site for future reference.

General Information
Read this document and the online version of the installation and operating instructions 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.

Type key

Example: MAGNA3 (D) 32-40 (F) (N) 220

Lifting the pump
Observe local regulations concerning limits for manual lifting or handling.

Mechanical installation

Do not insulate the control box or cover the operating panel.

Changing the control box position

Pressurised system
Minor or moderate personal injury

• Pay special attention to any escaping vapour when loosening the clamp.

Crushing of feet
Minor or moderate personal injury

• Do not drop the pump head when loosening the clamp.

Fit and tighten the screw that holds 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 the clamp. Incorrect position of the clamp will cause leakage from the pump and damage the hydraulic parts in the pump head.

Electrical installation

Electric shock
Death or serious personal injury

• Before starting any work on the product, make sure that the power supply has been switched off. Lock the main switch in position 0. Type and requirements as specified in EN 60204-1, 5.3.2.

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.
• For plug-connected versions: In case of an insulation fault, the fault current may be a pulsating DC. Observe national legislation about requirements for and selection of Residual Current Device (RCD) when installing the pump.
• For terminal-connected versions: In case of an insulation fault, the fault current may be a DC or pulsating DC. Observe national legislation about requirements for and selection of Residual Current Device (RCD) when installing the pump.

Make sure that the fuse is dimensioned according to the nameplate and local legislation.
Connect all cables in accordance with local regulations.
Make sure that all cables are heat-resistant up to 70°C.
Install all cables in accordance with EN 60204-1 and EN 50174-2.

Intended use in the United Kingdom
Safety precautions for UK:

The product is not intended for use in any home appliance, home automation, home control system or consumer product in the UK.

Pumped liquids
Observe local legislation regarding pump housing material.

Do not pump aggressive liquids.

Do not pump flammable, combustible or explosive liquids.

Radio communication
The radio part of this product is a class 1 device and can be used anywhere in the EU member states without restrictions.
This pump incorporates a radio for remote control.
The pump can communicate with Grundfos GO and with other MAGNA3 pumps of the same type via the built-in radio.

External connections

Electric shock
Minor or moderate personal injury

• Separate wires connected to supply terminals, outputs NC, NO, C and start-stop input from each other and from the supply by reinforced insulation.

Make sure that all cables are heat-resistant up to 70°C.
Install all cables in accordance with EN 60204-1 and EN 50174-2.
Connect all cables in accordance with local regulations.

Input and output communication

Electric shock
Death or serious personal injury

• Separate input voltages from external equipment from live parts by reinforced insulation.

Setting the product

Hot surface
Minor or moderate personal injury

• At high liquid temperatures, the pump housing may be so hot that only the operating panel may be touched to avoid burns.

"Control mode"
Set the operating mode to "Normal" before you enable a control mode.

Servicing the product

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.

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. This will cause the motor to act like a generator, resulting in voltage on the pump.

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.

Fault finding

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.

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.

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.

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

Installing a communication interface module

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. This will cause the motor to act like a generator, resulting in voltage on the pump.

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. Make sure that the power supply cannot be accidentally switched on.
• It must be possible to lock the main switch in position 0. Type and requirements as specified in EN 60204-1, 5.3.2.

Technical data

Ambient temperature
0 to 40°C.
Ambient temperatures below 0°C require the following conditions:

• The media temperature is 5°C.
• The media contains glycol.
• The pump runs continuously and does not stop.
• For twin-head pumps cascade operation every 24 hours is mandatory.

Ambient temperature during transport: -40 to +70°C.

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.

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/0.6 MPa
PN 10: 10 bar/1.0 MPa
PN 12: 12 bar/1.2 MPa
PN 16: 16 bar/1.6 MPa.
Note: Not all variants are available in all markets.