Grundfos MAGNA1 C Series User manual

New MAGNA1
Model C
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) 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
Page 1. General information
1.1 Hazard statements
The symbols and hazard statements below may appear in
Grundfos installation and operating instructions, safety
instructions and service instructions.
The text accompanying the three hazard symbols DANGER,
WARNING and CAUTION is structured in the following way:
The hazard statements are structured in the following way:
1. General information 2
1.1 Hazard statements 2
1.2 Notes 3
1.3 Symbols on the product 3
2. Receiving the product 3
2.1 Inspecting the product 3
2.2 Scope of delivery 3
2.3 Lifting the product 4
3. Installing the product 5
3.1 Location 5
3.2 Tools 5
3.3 Insulating shells 5
3.4 Mechanical installation 6
3.5 Electrical connection 10
4. Starting up the product 15
4.1 Single-head pump 15
4.2 Twin-head pump 16
4.3 Pairing and unpairing twin-head pumps 16
5. Handling and storing the product 17
6. Product introduction 17
6.1 Product description 17
6.2 Intended use 17
6.3 Pumped liquids 17
6.4 Identification 18
6.5 Radio communication 18
6.6 Non-return valve 18
6.7 Closed valve operation 19
6.8 Accessories 19
7. Control functions 20
7.1 Proportional-pressure curve (PP1, PP2 or PP3) 20
7.2 Constant-pressure curve (CP1, CP2 or CP3) 20
7.3 Constant curve (I, II or III) 20
7.4 Overview of the control functions 21
7.5 Selecting control function 22
8. Setting the product 23
8.1 Operating panel 23
8.2 Setting the control function 23
8.3 Connecting the pump to Grundfos GO Remote 25
8.4 Communication, control and monitoring 27
9. Fault finding the product 28
9.1 Grundfos Eye operating status 28
9.2 Resetting a fault indication 29
9.3 Reading out warning and alarm codes in Grundfos GO
Remote 29
9.4 Fault finding table 30
9.5 Warning 77, twin-head pump 31
10. Technical data 32
11. Disposing of the product 33
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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.

English (GB)
3
1.2 Notes
The symbols and notes below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
1.3 Symbols on the product
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.
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
•quickguide
• 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
•quickguide
• safety instructions
• two ALPHA plugs.
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.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
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!
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

English (GB)
4
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
• quick guide
• 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
• quick guide
• safety instructions
• two boxes with terminal and cable glands.
2.3 Lifting the product
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 the pump
Fig. 6 Incorrect lifting of the pump
TM06 7223 3016TM06 6741 3016
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.
TM06 7219 3016

English (GB)
5
3. Installing the product
3.1 Location
The pump is designed for indoor installation.
Always install the pump in an 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.
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
Fig. 7 Recommended tools
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 for pumps in heating systems are factory-fitted
with the pump. Remove the insulating shells before you install the
pump. See fig. 8.
Fig. 8 Removing insulating shells from the 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.
Fig. 9 Insulation of the pump housing and pipe
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
0.6 x 3.5
5.0
1.2 x 8.0
TX20
TX10
1
2
3
4
5
6
7
Insulating shells increase the pump dimensions.
TM05 5512 3016
Do not insulate the control box or cover the operating
panel.
TM05 5549 3016

English (GB)
6
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.
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 3812
2
Close the isolating valves and make sure
that the system is not pressurised during
installation of the pump.
TM06 8040 0317
3 Mount 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 the system
pressure.
For further information about torques, see
page 40.
TM05 5516 3816TM05 5517 3812

English (GB)
7
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.
Fig. 10 Pump installed with horizontal motor shaft
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.
Fig. 11 Pump with the control box in horizontal position
Fig. 12 Automatic vent
TM05 5518 3016
A B
C D
TM05 5522 3016
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.
TM05 6062 3016

English (GB)
8
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.
Fig. 13 Correctly centred sealing system
Fig. 14 Incorrectly centred sealing system
Fig. 15 Fitting the pump head to the pump housing
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. 15.
TM05 5837 3016

English (GB)
9
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
the clamp. Incorrect position of the clamp will cause
leakage from the pump and damage the hydraulic
parts in the pump head.
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
8Nm!
5.0
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
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.
Insulating shells for
pumps in
air-conditioning
and cooling
systems must be
ordered separately.
TM05 5529 3016
Step Action Illustration
8 Nm5.0

English (GB)
10
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.
• 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.
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, that is a
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:

English (GB)
11
3.5.2 Wiring diagrams
Fig. 16 Example of a plug-connected motor with a main switch, backup fuse and additional protection
Fig. 17 Example of a mains-connected motor with a main switch, backup fuse and additional protection
Fig. 18 Connection to external control
TM05 5277 3016
External switch
Fuse
RCD/RCCB
TM06 8503 0817
TM06 9106 4517 - TM06 8060 0717
L
N
L
N
External switch
Fuse
RCD/RCCB
CNC S/S S/S CNC
12
Pos. Description
1 Plug-connected versions
2 Terminal-connected versions
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.

English (GB)
12
3.5.3 Connection to the power supply, plug-connected
versions
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 3216
2
Connect the cable
conductors to the
power supply plug.
TM05 5539 3812
3
Bend the cable
with the cable
conductors
pointing upwards.
TM05 5540 3812
4
Pull out the
conductor guide
plate and throw it
away.
TM05 5541 3812
5
Click the plug
cover onto the
power supply plug.
TM05 5542 3812
6
Screw the cable
gland onto the
power supply plug.
TM05 5543 3812
17 mm
12 mm
7 mm
Ø 5.5 - 10 mm
Max. 1.5 mm2
Click
Click
7
Insert the power
supply plug into
the male plug in
the pump control
box.
TM07 1417 1618
Step Action Illustration
1
Loosen the cable
gland and remove
it from the plug.
TM05 5545 3812
2
Pull off the plug
cover while
pressing on both
sides.
TM05 5546 3812
3
Loosen the cable
conductors one by
one by pressing a
screwdriver gently
into the terminal
clip.
TM05 5547 3812
4
The plug has now
been removed
from the power
supply plug.
TM05 5548 3812
Step Action Illustration
Click
x 3
Max 0.8 x 4

English (GB)
13
3.5.4 Connection to the power supply, terminal-connected
version
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.
TM06 8049 0717
3
Connect the
cable gland to
the control box.
TM06 8050 0717
4
Pull the power
cable through
the cable gland.
TM06 8051 0717
5
Strip the cable
conductors as
illustrated.
TM06 8052 0717
1 x 230 V
7 mm
20 mm
7 mm
25 mm
Min. Ø 7 mm
Max. Ø 14 mm
6
Connect the
cable
conductors to
the power
supply plug.
TM06 8053 0717
7
Insert the power
supply plug into
the male plug in
the control box.
TM06 8054 0717
8
Tighten the
cable gland.
Refit the front
cover.
TM06 8061 0717
Step Action Illustration

English (GB)
14
3.5.5 Connecting the digital input 3.5.6 Connecting the fault relay output
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 digital
input terminal
connector.
TM06 8017 8517 0817
3
Pull the cable
through a cable
gland, M16, and
connect the cable
conductors to the
digital input
terminal
connector.
See section
8.4.1 Digital input
(Start/Stop) for
instructions on
how to connect
the cable to the
terminal.
TM06 8516 0817
4
Refit the front
cover to the
control box.
TM06 8059 0717
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 fault
relay output cover
and remove it.
TM06 8056 0817
3
Pull the cable
through a cable
gland, M16, and
connect the cable
conductors to the
fault relay output
terminal
connector.
See section
8.4.2 Fault relay
output for
instructions on
how to connect
the cable to the
terminal.
TM06 8057 0817
4Refit the fault
relay output cover.
TM06 8058 0717
5
Refit the front
cover to the
control box.
TM06 8059 0717

English (GB)
15
4. Starting up the product
4.1 Single-head pump
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.
In order to protect the electronics, the number of
starts and stops 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.
TM07 0033 3917
2 Operating 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 by pressing the button . See section
7. Control functions and 8. Setting the product.
TM05 5551 3016
1 x 230 V± 10%
׽ϝ0/60 Hz
1 / On
0 / Off

English (GB)
16
4.2 Twin-head pump
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.
4.3.1 Pairing
4.3.2 Unpairing
Make sure that both pump heads are powered on.
When you have paired the pumps, you must wait 10
seconds before unpairing.
The master pump head is the one from which you
initiate the pairing.
Step Action Illustration
1
Push and hold the
button on the
pump you wish to
assign as the
master pump for 5
seconds.
The centre of
Grundfos Eye on
both pumps will
begin to flash.
TM06 8524 1017
2
Push the button
on the other pump
to assign this as
the slave pump.
TM06 8525 1017
3
The centre of both
Grundfos Eye
indicator lights are
alight and
constant.
The two pumps
are now paired.
TM06 8527 1017
5 sec.
=
Step Action Illustration
1
Push and hold the
button on any of
the two pump
heads for 5
seconds.
TM06 8521 1017
2
The light in the
centre of Grundfos
Eye will disappear.
The system has
been deactivated.
TM06 8522 1017
5 sec.
=

English (GB)
17
5. Handling and storing the product
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.
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.
6.3.1 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.
Fig. 19 Pumped liquids
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.
Observe local regulations regarding pump-housing
material.
Do not pump aggressive liquids.
Do not pump flammable, combustible or explosive
liquids.
Additives with a density or kinematic viscosity higher
than water reduces the hydraulic performance.
TM06 8055 0717
Max. 95 % RH
IPX4D

English (GB)
18
6.4 Identification
6.4.1 Nameplate
Fig. 20 Example of a nameplate
* Example of production code: 1326. The pump was produced in
week 26, 2013.
Fig. 21 Production code on the packaging
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.
Fig. 22 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
19 Manufacturer's name and address
TM06 6692 2216
Code Example MAGNA1 D 80 -120 (F) (N) 360
Type range
MAGNA1
D Twin-head pump
Nominal diameter (DN) of inlet
and outlet ports [mm]
Maximum head
[dm]
F
Pipe connection
Threaded
Flange
N
Pump housing material
Cast iron
Stainless steel
Port-to-port length [mm]
TM05 3055 0912

English (GB)
19
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.
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.
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.
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.
Fig. 23 Position of a blanking flange
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.
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.
Insulating shells increase the pump dimensions.
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.
Pump type Product number
MAGNA1 25-40/60/80/100/120 (N) 98538852
MAGNA1 32-40/60/80/100/120 (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 50-60/80 F (N) 98164599
MAGNA1 50-100/120/150/180 F (N) 98164600
MAGNA1 65-40/60/80/100/120/150 F (N) 98538839
MAGNA1 80-60/80/100/120 F 98538851
MAGNA1 100-40/60/80/100/120 F 98164611
The insulating kit also fits stainless-steel versions
(N).
TM06 8518 0817
Pump type Product number
MAGNA1 D 25-40/60/80/100/120
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 50-60/80/100/120/150/180 F
MAGNA1 D 65-40/60/80/100/120/150 F
MAGNA1 D 80-60/80/100/120 F
MAGNA1 D 100-40/60/80/100/120 F
98159372

English (GB)
20
6.8.5 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.
In order to communicate with Grundfos GO Remote via infrared,
you need an add-on module. Two variants are available as
described in the following.
MI 204
MI 204 is an add-on module with built-in infrared and radio
communication. You can use MI 204 in conjunction with an Apple
iPhone or iPod with Lightning connector.
Fig. 24 MI 204
Supplied with the product:
• Grundfos MI 204
• sleeve
• quick guide
• charger cable.
MI 301
MI 301 is a module with built-in infrared and radio
communication. Use MI 301 in conjunction with an Android or
iOS-based smart device with a Bluetooth connection. MI 301 has
a rechargeable Li-ion battery and must be charged separately.
Fig. 25 MI 301
Supplied with the product:
• Grundfos MI 301
• battery charger
• quick guide.
Product numbers
Together with the Grundfos GO module, you will need to
download the Grundfos GO Remote app, which is available in
Apple App Store and Google Play.
For function and connection to the pump, see the separate
installation and operating instructions for the desired type of
Grundfos GO setup.
7. Control functions
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.
Fig. 26 Three proportional-pressure curves and settings
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.
Fig. 27 Three constant-pressure curves and settings
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.
Fig. 28 Three constant-curve settings
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.
The radio communication between the pump and
Grundfos GO Remote is encrypted to protect against
misuse.
TM05 7704 1513TM05 3890 1712
Grundfos GO variant Product number
Grundfos MI 204 98424092
Grundfos MI 301 98046408
Factory setting: Intermediate proportional-pressure
curve, referred to as PP2.
TM05 5555 3812TM05 5556 3812TM05 5557 3812
PP3
PP2
PP1
Q
H
Q
H
CP3
CP2
CP1
Q
H