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)
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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)
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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: