Grundfos MAGNA1 D User manual

MAGNA1
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
These installation and operating instructions describe MAGNA1.
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.
Page
1. General information
1.1 Symbols used in this document
The text accompanying the three hazard symbols DANGER,
WARNING and CAUTION is structured in the following way:
1.2 Safety symbols on the pump
1. General information 2
1.1 Symbols used in this document 2
1.2 Safety symbols on the pump 2
2. Receiving the product 3
2.1 Inspecting the product 3
2.2 Scope of delivery 3
2.3 Lifting the pump 4
3. Installing the product 4
3.1 Location 4
3.2 Tools 4
3.3 Mechanical installation 5
3.4 Electrical installation 8
4. Starting up the product 11
5. Storing and handling the product 11
5.1 Storing the product 11
6. Product introduction 12
6.1 Applications 12
6.2 Pumped liquids 12
6.3 Identification 13
6.4 Insulating shells 13
6.5 Non-return valve 13
7. Control functions 14
7.1 Overview of control functions 15
7.2 Selecting control function 16
7.3 Operating the product 17
7.4 Grundfos Eye 17
7.5 Light fields indicating the pump setting 17
8. Fault finding the product 18
8.1 Grundfos Eye operating status 18
8.2 Fault finding 18
9. Accessories 19
9.1 Insulating kits for air-conditioning and cooling systems 19
9.2 Blanking flanges 19
9.3 Counterflanges 19
9.4 ALPHA plugs 19
10. Technical data 20
11. Disposing of the product 20
Prior to installation, read this document and the quick
guide. 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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.
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.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Notes or instructions that make the work easier and
ensure safe operation.
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.
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.
8Nm!

English (GB)
3
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
voltage and frequency of the installation site. See section
6.3.1 Nameplate.
2.2 Scope of delivery
2.2.1 Plug-connected single-head pump
Fig. 1 Plug-connected single-head pump
The box contains the following items:
• MAGNA1-pump
• insulating shells
•gaskets
• quick guide
• safety instructions
• one ALPHA plug.
2.2.2 Plug-connected twin-head pump
Fig. 2 Plug-connected twin-head pump
The box contains the following items:
• MAGNA1-pump
•gaskets
• quick guide
• safety instructions
• two ALPHA plugs.
2.2.3 Terminal-connected single-head pump
Fig. 3 Terminal-connected single-head pump
The box contains the following items:
• MAGNA1-pump
• insulating shells
•gaskets
•quickguide
• safety instructions
• box with terminal and cable glands.
2.2.4 Terminal-connected twin-head pump
Fig. 4 Terminal-connected twin-head pump
The box contains the following items:
• MAGNA1-pump
•gaskets
•quickguide
• safety instructions
• two boxes with terminal and cable glands.
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.
TM05 5508 3016TM06 7222 3016
TM06 7223 3016TM06 6791 3016

English (GB)
4
2.3 Lifting the pump
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.
Fig. 5 Correct lifting of pump
Fig. 6 Incorrect lifting of pump
3. Installing the product
3.1 Location
The pump is designed for indoor installation.
3.2 Tools
Fig. 7 Recommended tools
Observe local regulations concerning limits for
manual lifting or handling.
TM05 5819 3016
Do not lift the pump head by the control box, i.e. the
red area of the pump. See fig. 6.
TM006 7219 3016
TM05 6472 4712
Pos. Tool Size
1 Screwdriver, straight slot 0.6 x 3.5 mm
2 Screwdriver, straight slot 1.2 x 8.0 mm
3 Screwdriver, torx bit TX10
4 Screwdriver, torx bit TX20
5 Hexagon key 5.0 mm
6 Side cutter
7 Open-end spanner Depending on DN size
8 Pipe wrench Only used for pumps with
unions
0.6 x 3.5
5.0
1.2 x 8.0
TX20
TX10
1
2
3
4
5
6
7
8

English (GB)
5
3.3 Mechanical installation
The pump range includes both flanged and threaded versions.
These installation and operating instructions apply to both
versions, but give a general description of flanged versions. If the
versions differ, the threaded version will be described separately.
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 or threaded connections, see page
26.
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. Pump housing with M12 thread.
To ensure adequate cooling of 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.
3.3.1 Pump positions
Always install the pump with horizontal motor shaft.
• Pump installed correctly in a vertical pipe. See fig. 8, pos. A.
• Pump installed correctly in a horizontal pipe.
See fig. 8, pos. B.
• Do not install the pump with vertical motor shaft.
See fig. 8, pos. C and D.
Fig. 8 Pump installed with horizontal motor shaft
3.3.2 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. 9.
Fig. 9 Pump with control box in horizontal position
Fig. 10 Automatic vent
Step Action Illustration
1
Arrows on the pump housing
indicate the liquid flow direction
through the pump. The liquid flow
direction can be horizontal or
vertical, depending on the
control-box position.
TM05 5513 3812TM05 5514 3812
2
Close the isolating valves and
make sure that the system is not
pressurised during installation of
the pump.
TM05 2863 0612
3Mount the pump with gaskets in
the pipes.
TM05 5515 3812
4
Flanged version:
Fit the bolts, washers and nuts.
Use the correct size of bolts
according to system pressure.
For further information about
torques, see page 26.
Threaded version:
Tighten the union nuts.
TM05 5516 3816TM05 5517 3812
TM05 5518 3016TM05 5522 3016
Fit twin-head pumps installed in horizontal pipes
with an automatic air vent, Rp 1/4, in the upper part
of the pump housing. See fig. 10.
TM05 6062 3016
A B
C D

English (GB)
6
3.3.3 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 figures 11 and 12.
2. Gently lower the pump head with 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. 13.
Fig. 11 Correctly centred sealing system
Fig. 12 Incorrectly centred sealing system
Fig. 13 Fitting the pump head to the pump housing
3.3.4 Changing the control box position
TM05 6650 3016TM05 6651 3016
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. 13.
TM05 5837 3016
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
the clamp. Incorrect position of the clamp will cause
leakage from the pump and damage the hydraulic
parts in the pump head.
8Nm!

English (GB)
7
As an alternative to insulating shells, you can insulate the pump
housing and pipes as illustrated in fig. 13.
Fig. 14 Insulation of pump housing and pipe
Step Action Illustration
1
Loosen the screw in the clamp
that holds the pump head and
pump housing together.
If you loosen the screw too
much, the pump head will be
completely disconnected from
the pump housing.
TM05 2867 3016
2
Carefully turn the pump head to
the desired position.
If the pump head is stuck,
loosen it with a light blow of a
rubber mallet.
TM05 5526 3016
3
Place the control box in
horizontal position so that the
Grundfos logo is in vertical
position. The motor shaft must
be in horizontal position.
TM05 5527 3016
4
Due to the drain hole in the
stator housing, position the gap
of the clamp as shown in step
4a or 4b.
TM05 2870 3016
4a
Single-head pump.
Position the clamp so that the
gap points towards the arrow.
It can be in position 3, 6, 9 or 12
o'clock.
TM05 2918 3016
4b
Twin-head pump.
Position the clamps so that the
gaps point towards the arrows.
They can be in position 3, 6, 9
or 12 o'clock.
TM05 2917 3016
5.0
5
Fit and tighten the screw
holding the clamp to 8 ± 1 Nm.
Do not retighten the screw if
condensed water is dripping
from the clamp.
TM05 2872 3016
6
Fit the insulating shells.
The insulating shells for pumps
in air-conditioning and cooling
systems must be ordered
separately.
TM05 5529 3016
Do not insulate the control box or cover the control
panel.
TM05 5549 3016
Step Action Illustration
8 Nm5.0

English (GB)
8
3.4 Electrical installation
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.
• 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.
3.4.1 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.
3.4.2 Connection to the power supply
Terminal-connected versions
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 the 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:
Step Action Illustration
1
Remove the front
cover from the
control box.
Do not remove the
screws from the
cover.
TM05 5530 3016
2
Locate the power
supply plug and
cable gland in the
small cardboard
box supplied with
the pump.
TM05 5531 3016
1 x 230 V
3
Connect the cable
gland to the
control box.
TM05 5532 3016
4
Pull the power
supply cable
through the cable
gland.
TM05 5533 3016
5
Strip the cable
conductors as
illustrated.
TM05 5534 3016
6
Connect the cable
conductors to the
power supply plug.
TM05 5535 3016
7
Insert the power
supply plug into
the male plug in
the control box.
TM05 5536 3016
8
Tighten the cable
gland.
Refit the front
cover.
TM05 5537 3016
Step Action Illustration
7 mm
20 mm
7 mm
25 mm
Min. Ø 7 mm
Max. Ø 14 mm

English (GB)
9
Plug-connected versions
Assembling the plug
Disassembling the plug
Step Action Illustration
1
Fit the cable gland
and plug cover to
the cable. Strip
the cable
conductors as
illustrated.
TM05 5538 3016
2
Connect the cable
conductors to the
power supply
plug.
TM05 5539 3016
3
Bend the cable
with the cable
conductors
pointing upwards.
TM05 5540 3016
4
Pull out the
conductor guide
plate and throw it
away.
TM05 5541 3016
5
Click the plug
cover onto the
power supply
plug.
TM05 5542 3016
6
Screw the cable
gland onto the
power supply
plug.
TM05 5543 3016
17 mm
12 mm
7 mm
Ø 5.5 - 10 mm
Max. 1.5 mm
2
Click
Click
7
Insert the power
supply plug into
the male plug in
the control box.
TM05 5544 3016
Step Action Illustration
1
Loosen the cable
gland and remove
it from the plug.
TM05 5545 3016
2
Pull off the plug
cover while
pressing on both
sides.
TM05 5546 3016
3
Loosen the cable
conductors one by
one by pressing a
screwdriver gently
into the terminal
clip.
TM05 5547 3016
4
The plug has now
been removed
from the power
supply plug.
TM05 5548 3016
Step Action Illustration
Click
x 3
Max 0.8 x 4

English (GB)
10
3.4.3 Connection diagrams
Fig. 15 Example of a mains-connected motor with main switch, backup fuse and additional protection
Fig. 16 Example of a plug-connected motor with main switch, backup fuse and additional protection
TM03 2397 3016
External switch
Fuse
RCD/RCCB
TM05 5277 3016
External switch
Fuse
RCD/RCCB
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.

English (GB)
11
4. Starting up the product
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.
5. Storing and handling the product
5.1 Storing the product
5.1.1 Frost protection
The number of starts and stops via the power supply
must not exceed four times per hour.
Step Action Illustration
1Switch on the power supply to the pump.
The pump starts after approximately 5 seconds.
TM05 5550 3016
2 Control panel at first startup.
TM05 5551 3016
3
The pump has been factory-set to the intermediate
proportional-pressure curve.
Select the control mode according to the system
application.
TM05 5551 3016
1 x 230 V± 10 %
∽50/60 Hz
0/
Of
f
1/On
If the pump is not used during periods of frost, take
the necessary steps to prevent frost bursts.

English (GB)
12
6. Product introduction
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 control panel.
6.1 Applications
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.
6.2 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 pumps are also suitable for domestic hot-water systems.
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.
6.2.1 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 / 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, check and maintain the
glycol mixture regularly. If further dilution of the supplied glycol is
required, follow the glycol supplier's instructions.
Fig. 17 Pumped liquids
You can connect the pump to the power supply in two ways, that
is via terminals and via plug. These options are available for both
flanged and threaded versions.
Observe local regulation regarding pump-housing
material.
Do not pump aggressive liquids.
Do not pump flammable, combustible or explosive
liquids.
Additives with a density and/or kinematic viscosity
higher than those/that of water reduce the hydraulic
performance
TM05 5510 3016
Max. 95 % RH
IPX4D

English (GB)
13
6.3 Identification
6.3.1 Nameplate
Fig. 18 Example of nameplate
* Example of production code: 1326. The pump was produced in
week 26, 2013.
Fig. 19 Production code on packaging
6.4 Insulating shells
Insulating shells are available for single-head pumps only.
Reduce the heat loss from the pump and pipes by insulating the
pump housing and the pipes. See fig. 20.
• Insulating shells for pumps in heating systems are supplied
with the pump.
• 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 9.1 Insulating kits for
air-conditioning and cooling systems.
Insulating shells increases the pump dimensions.
Fig. 20 Insulating shells
Pumps for heating systems are factory-fitted with insulating
shells. Remove the insulating shells before you install the pump.
6.5 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. 21. This is especially
important in proportional-pressure control mode with reduced
head at low flow.
Fig. 21 Non-return valve
TM05 5561 3812
Pos. Description
1 Product name
2 Model
3 Production code, PC, year and week*
4 Serial number
5 Product number
6 Country of manufacture
7 Enclosure class
8 Energy Efficiency Index, EEI
9 Part, according to EEI
10 Temperature class
11 Minimum current [A]
12 Maximum current [A]
13 Minimum power [W]
14 Maximum power [W]
15 Maximum system pressure
16 Voltage [V] and frequency [Hz]
17 QR code
18 CE mark and approvals
TM06 6692 2216
Limit the heat loss from the pump housing and
pipes.
TM05 5512 3016TM05 3055 0912

English (GB)
14
7. Control functions
Fig. 22 Selection of pump setting for system type
Factory setting: Intermediate proportional-pressure curve,
referred to as PP2.
Proportional-pressure curve (PP1, PP2 or PP3)
Proportional-pressure control adjusts the pump performance to
the actual heat demand in the system, but the pump performance
follows the selected performance curve, PP1, PP2 or PP3. See
fig. 23 where PP2 has been selected. For further information, see
section 8. Fault finding the product.
Fig. 23 Three proportional-pressure curves/settings
The selection of the right proportional-pressure setting depends
on the characteristics of the heating system in question and the
actual heat demand.
Constant-pressure curve (CP1, CP2 or CP3)
Constant-pressure control adjusts the pump performance to the
actual heat demand in the system, but the pump performance
follows the selected performance curve, CP1, CP2 or CP3. See
fig. 24 where CP1 has been selected. For further information, see
section 8. Fault finding the product.
Fig. 24 Three constant-pressure curves/settings
The selection of the right constant-pressure setting depends on
the characteristics of the heating system in question and the
actual heat demand.
Constant curve (I, II or III)
At constant-curve operation, the pump runs at a constant speed,
independent of the actual flow demand in the system. The pump
performance follows the selected performance curve, I, II or III.
See fig. 25 where II has been selected. For further information,
see section 8. Fault finding the product.
Fig. 25 Three constant-curve settings
The selection of the right constant-curve setting depends on the
characteristics of the heating system in question.
TM05 5554 3812TM05 5555 3812
Q
H
PP3
PP2
PP1
Q
H
TM05 5556 3812TM05 5557 3812
Q
H
CP3
CP2
CP1
Q
H

English (GB)
15
7.1 Overview of control functions
Fig. 26 Pump setting in relation to pump performance
TM05 2777 0512
Setting Pump curve Function
PP1 Lowest proportional-pressure
curve
The duty point of the pump will move up or down on the lowest proportional-pressure curve,
depending on the heat demand. See fig. 26.
The head is reduced at falling heat demand and increased at rising heat demand.
PP2 Intermediate
proportional-pressure curve
The duty point of the pump will move up or down on the intermediate proportional-pressure
curve, depending on the heat demand. See fig. 26.
The head is reduced at falling heat demand and increased at rising heat demand.
PP3 Highest
proportional-pressure curve
The duty point of the pump will move up or down on the highest proportional-pressure curve,
depending on the heat demand. See fig. 26.
The head is reduced at falling heat demand and increased at rising heat demand.
CP1 Lowest constant-pressure
curve
The duty point of the pump will move out or in on the lowest constant-pressure curve,
depending on the heat demand in the system. See fig. 26.
The head is kept constant, irrespective of the heat demand.
CP2 Intermediate
constant-pressure curve
The duty point of the pump will move out or in on the intermediate constant-pressure curve,
depending on the heat demand in the system. See fig. 26.
The head is kept constant, irrespective of the heat demand.
CP3 Highest constant-pressure
curve
The duty point of the pump will move out or in on the highest constant-pressure curve,
depending on the heat demand in the system. See fig. 26.
The head is kept constant, irrespective of the heat demand.
III Speed III
The pump runs on a constant curve which means that it runs at a constant speed.
At speed III, the pump is set to run on the maximum curve under all operating conditions.
See fig. 26.
You obtain quick venting of the pump by setting the pump to speed III for a short period.
II Speed II
The pump runs on a constant curve which means that it runs at a constant speed.
At speed II, the pump is set to run on the intermediate curve under all operating conditions.
See fig. 26.
I Speed I
The pump runs on a constant curve which means that it runs at a constant speed.
At speed I, the pump is set to run on the minimum curve under all operating conditions. See
fig. 26.
III
II
I
H
PP3
CP3
CP2
PP1
CP1
PP2
Q

English (GB)
16
7.2 Selecting control function
System application Select this control mode
In systems with relatively large pressure losses in the distribution pipes and in air-conditioning and cooling
systems.
• Two-pipe heating systems with thermostatic valves and the following:
– very long distribution pipes
– strongly throttled pipe balancing valves
– differential-pressure regulators
– large pressure losses in those parts of the system through which the total quantity of water flows, for
example boiler, heat exchanger and distribution pipe up to the first branching.
• Primary circuit pumps in systems with large pressure losses in the primary circuit.
• Air-conditioning systems with the following:
– heat exchangers, fan coils
– cooling ceilings
– cooling surfaces.
Proportional pressure
In systems with relatively small pressure losses in the distribution pipes.
• Two-pipe heating systems with thermostatic valves and the following:
– dimensioned for natural circulation
– small pressure losses in those parts of the system through which the total quantity of water flows,
for example boiler, heat exchanger and distribution pipe up to the first branching or modified to a
high differential temperature between flow pipe and return pipe, for example district heating.
• Underfloor heating systems with thermostatic valves.
• One-pipe heating systems with thermostatic valves or pipe balancing valves.
• Primary circuit pumps in systems with small pressure losses in the primary circuit.
Constant pressure
You can also set the pump to operate according to the maximum or minimum curve, like an uncontrolled
pump:
• Use the maximum-curve mode in periods in which a maximum flow is required. This operating mode is
for instance suitable for hot-water priority in domestic hot-water systems.
• Use the minimum-curve mode in periods in which a minimum flow is required.
Constant curve
Q
H
Q
H
Q
H

English (GB)
17
7.3 Operating the product
Fig. 27 Control panel
7.4 Grundfos Eye
Grundfos Eye is on when you switch on the power supply. See
fig. 27, pos. 1.
Grundfos Eye is an indicator light providing information about the
actual pump status.
The indicator light flashes in different sequences and provides
information about the following:
• power on and off
• pump alarms.
The function of Grundfos Eye is described in section
8.1 Grundfos Eye operating status.
Faults preventing the pump from operating properly, for example
blocked rotor, are indicated by Grundfos Eye. See section
8.1 Grundfos Eye operating status.
If a fault is indicated, correct the fault and reset the pump by
switching the power supply off and on.
If the pump impeller is rotated, for example when filling the pump
with water, sufficient energy may be generated to light up the
control panel even if the power supply has been switched off.
7.5 Light fields indicating the pump setting
The pump has nine performance settings which you can select
with the push-button. See fig. 27, pos. 3.
The pump setting is indicated by eight light fields in the display.
See fig. 27, pos. 2.
Fig. 28 Factory setting, PP2
CAUTION
Hot surface
Minor or moderate personal injury
- Only touch the control panel to avoid burns.
TM05 5552 3812
Pos. Description
1Operating status of Grundfos Eye.
See section 7.4 Grundfos Eye.
2
Eight light fields indicating the pump setting.
See section 7.5 Light fields indicating the pump
setting.
3 Push-button for selection of pump setting.
1
2
3
TM05 5553 3812
Button
presses Active light fields Description
0
Intermediate
proportional-pressure
curve, referred to as PP2
1
Highest
proportional-pressure
curve, referred to as PP3
2
Lowest
constant-pressure curve,
referred to as CP1
3
Intermediate
constant-pressure curve,
referred to as CP2
4
Highest
constant-pressure curve,
referred to as CP3
5
Constant curve III
6
Constant curve II
7
Constant curve I
8
Lowest
proportional-pressure
curve, referred to as PP1

English (GB)
18
8. Fault finding the product
8.1 Grundfos Eye operating status
8.2 Fault finding
Reset a fault indication in one of the following ways:
• When you have eliminated the fault cause, the pump reverts to
normal duty.
• If the fault disappears by itself, the fault indication is
automatically reset.
Grundfos Eye Indication Cause
No lights are on. The power is off.
The pump is not running.
Two opposite green indicator lights running in the
direction of rotation of the pump.
The power is on.
The pump is running.
Two opposite red indicator lights flashing
simultaneously.
Alarm.
The pump is stopped.
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 supply cable is damaged, it must be
replaced by the manufacturer, the manufacturer's
service partner or a similarly qualified person.
Fault Automatic reset
and restart? Corrective actions
Other pumps or sources force flow through
the pump even if the pump is stopped. There
is light in the display even if the power
supply is switched off.
Yes
Check the system for defective non-return valves and replace the
valves, if necessary.
Check the system for correct position of non-return valves.
The supply voltage to the pump is too low. Yes Check that the power supply is within the specified range.
The pump is blocked. No
Dismantle the pump and remove any foreign matter or impurities
preventing the pump from rotating.
Check the water quality to eliminate the risk of lime precipitation.
No water at the pump inlet, or the water
contains too much air. No
Prime and vent the pump before a new startup. Check that the
pump is operating correctly. If not, replace the pump, or contact
Grundfos Service.
Fault in the pump electronics. Yes Replace the pump, or contact Grundfos Service.
The supply voltage to the pump is too high. Yes Check that the power supply is within the specified range.

English (GB)
19
9. Accessories
9.1 Insulating kits for air-conditioning and cooling
systems
You can fit single-head pumps for air-conditioning and cooling
systems with insulating shells. A kit consists of two shells made
of polyurethane and a self-adhesive seal to ensure tight
assembly.
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.
9.2 Blanking flanges
A blanking flange is used to blank off the opening when one of the
pumps of a twin-head pump is removed for service to enable
uninterrupted operation of the other pump.
Fig. 29 Position of blanking flange
9.3 Counterflanges
Counterflange kits consist of two flanges, two gaskets and bolts
and nuts, making it possible to install the pump in any pipes. See
MAGNA1 data booklet, Accessories section, for the right
dimension and product number.
9.4 ALPHA plugs
Fig. 30 ALPHA plugs
Pump type Product number
MAGNA1 25-40/60/80/100/120 (N) 98538852
MAGNA1 32-40/60/80/100 (N) 98538853
MAGNA1 32-40/60/80/100 F (N) 98538854
MAGNA1 32-120 F (N) 98164595
MAGNA1 40-40/60 F (N) 98538855
MAGNA1 40-80/100 F (N) 98164597
MAGNA1 40-120/150/180 F (N) 98164598
MAGNA1 50-40/60/80 F (N) 98164599
MAGNA1 50-100/120/150/180 F (N) 98164600
MAGNA1 65-40/60/80/100/120/150 F (N) 98538839
MAGNA1 80-40/60/80/100/120 F 98538851
MAGNA1 100-40/60/80/100/120 F 98164611
The insulating kit also fits stainless-steel versions
(N).
TM05 5525 3812
Pump type Product number
MAGNA1 D 32-40/60/80/100 (F)
MAGNA1 D 40-40/60 F 98159373
MAGNA1 D 32-120 F
MAGNA1 D 40-/80/100/120/150/180 F
MAGNA1 D 50-40/60/80/100/120/150/180 F
MAGNA1 D 65-40/60/80/100/120/150 F
MAGNA1 D 80-40/60/80/100/120 F
MAGNA1 D 100-40/60/80/100/120 F
98159372
TM05 2677 - 2676 0312
Description Product number
ALPHA plug with cable relief 97928845
ALPHA plug, angled, with 4 m cable 96884669
ALPHA plug, angled, with inrush
protection with 1 m cable 97844632

English (GB)
20
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 air 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.
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. 18.
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.
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 lower than 43 dB(A).
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 φfrom 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 φfrom 0.55
to 0.98.
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.
Dispose of this product or parts of it in an environmentally sound
way according to local regulations.
For further information, see the end-of-life information on
www.grundfos.com.
Subject to alterations.
The actual inlet pressure and the pump pressure
against a closed valve must be lower than the
maximum permissible system pressure.
The values in the table below apply to single-head
pumps and twin-head pumps in single-head
operation.
Single-head pumps
DN
Liquid temperature
75 °C 95 °C 110 °C
Inlet pressure
[bar] / [MPa]
25-40/60/80/100/120 0.10 / 0.01 0.35 / 0.035 1.0 / 0.10
32-40/60/80/100/120 0.10 / 0.01 0.35 / 0.035 1.0 / 0.10
32-120 F 0.10 / 0.01 0.20 / 0.020 0.7 / 0.07
40-40/60 F 0.10 / 0.01 0.35 / 0.035 1.0 / 0.10
40-80/100/120/150/180 F 0.10 / 0.01 0.50 / 0.05 1.0 / 0.10
50-40/60/80 F 0.10 / 0.01 0.40 / 0.04 1.0 / 0.10
50-100/128 F 0.10 / 0.01 0.50 / 0.05 1.0 / 0.10
50-150/180 F 0.70 / 0.07 1.20 / 0.12 1.7 / 0.17
65-40/60/80/100/120/150 F 0.70 / 0.07 1.20 / 0.12 1.7 / 0.17
80-40/60/80/100/120 F 0.50 / 0.05 1.00 / 0.10 1.5 / 0.15
100-40/60/80/100/120 F 0.70 / 0.07 1.20 / 0.12 1.7 / 0.17
The actual inlet pressure and the pump pressure
against a closed valve must be lower than the
maximum permissible system pressure.