Grundfos MAGNA3 25-100 (N) User manual

GRUNDFOS INSTRUCTIONS
MAGNA3
Model D
Installation and operating instructions

2

3
Table of contents
MAGNA3
English (US)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Français (CA)
Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Español (MX)
Instrucciones de instalación y operación . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

English (US)
4
English (US) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions describe MAGNA3
model D.
Sections 1-6 give the information necessary to be able to unpack,
install and start up the product in a safe way.
Sections 7-14 give important information about the product, as
well as information on service, fault finding and disposal of the
product.
CONTENTS
Page
1. Limited warranty 5
2. General information 5
2.1 Hazard statements 5
2.2 Notes 5
2.3 Safety symbols on the pump 6
3. Receiving the product 6
3.1 Inspecting the product 6
3.2 Scope of delivery 6
3.3 Lifting the pump 7
4. Installing the product 7
4.1 Location 7
4.2 Tools 8
4.3 Insulating shells 8
4.4 Mechanical installation 9
4.5 Positioning the pump 9
4.6 Control box positions 10
4.7 Pump head position 10
4.8 Changing the control box position 11
4.9 Electrical installation 12
4.10 Connecting the power supply 13
5. Starting up the product 15
5.1 Single-head pump 15
5.2 Twin-head pump 16
6. Handling and storing the product 17
7. Product introduction 17
7.1 Applications 17
7.2 Pumped liquids 17
7.3 Pump heads in twin-head pumps 18
7.4 Identification 18
7.5 Model type 19
7.6 Radio communication 20
7.7 Insulating shells 20
7.8 Check valve 20
7.9 Closed-valve operation 20
8. Control functions 21
8.1 Quick overview of control modes 21
8.2 Operating modes 23
8.3 Control modes 23
8.4 Additional control mode features 27
8.5 Multipump modes 28
8.6 Setting values for control modes 29
8.7 Flow estimation accuracy 29
8.8 Flow accuracy table 30
8.9 External connections 31
8.10 Priority of settings 35
8.11 Input and output communication 35
9. Setting the product 40
9.1 Operating panel 40
9.2 Menu structure 40
9.3 Menu overview 41
9.4 "Home" menu 43
9.5 Status menu 43
9.6 "Settings" menu 45
9.7 "Assist" menu 55
9.8 "Description of control mode" 56
9.9 "Assisted fault advice" 56
10. Servicing the product 56
11. Fault finding the product 57
11.1 Grundfos Eye operating indications 57
11.2 Fault finding 58
11.3 Fault finding table 59
12. Technical data 60
12.1 Sensor specifications 61
12.2 Markings and approvals 62
13. Accessories 62
13.1 Grundfos GO 62
13.2 Communication interface module, CIM 62
13.3 Counterflanges 65
13.4 External sensors 66
13.5 Adapter 66
13.6 Cable for sensors 66
13.7 Blanking flange 66
14. Disposing of the product 66
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.

5
English (US)
1. Limited warranty
Products manufactured by Grundfos Pumps Corporation
(Grundfos) are warranted to the original user only to be free of
defects in material and workmanship for a period of 30 months
from date of installation, but not more than 36 months from date
of manufacture. Grundfos' liability under this warranty shall be
limited to repairing or replacing at Grundfos' option, without
charge, F.O.B. Grundfos' factory or authorized service station,
any product of Grundfos manufacture. Grundfos will not be liable
for any costs of removal, installation, transportation, or any other
charges that may arise in connection with a warranty claim.
Products which are sold, but not manufactured by Grundfos, are
subject to the warranty provided by the manufacturer of said
products and not by Grundfos' warranty.
Grundfos will not be liable for damage or wear to products caused
by abnormal operating conditions, accident, abuse, misuse,
unauthorized alteration or repair, or if the product was not
installed in accordance with Grundfos' printed installation and
operating instructions and accepted codes of good practice. The
warranty does not cover normal wear and tear.
To obtain service under this warranty, the defective product must
be returned to the distributor or dealer of Grundfos' products from
which it was purchased together with proof of purchase and
installation date, failure date and supporting installation data.
Unless otherwise provided, the distributor or dealer will contact
Grundfos or an authorized service station for instructions. Any
defective product to be returned to Grundfos or a service station
must be sent freight prepaid; documentation supporting the
warranty claim and/or a Return Material Authorization must be
included if so instructed.
Grundfos will not be liable for any incidental or consequential
damages, losses, or expenses arising from installation, use, or
any other causes. There are no express or implied warranties,
including merchantability or fitness for a particular purpose, which
extend beyond those warranties described or referred to above.
Some jurisdictions do not allow the exclusion or limitation of
incidental or consequential damages and some jurisdictions do
not allow limitations on how long implied warranties may last.
Therefore the above limitations or exclusions may not apply to
you. This warranty gives you specific legal rights and you may
also have other rights which vary from jurisdiction to jurisdiction.
Products which are repaired or replaced by Grundfos or
authorized service center under the provisions of these limited
warranty terms will continue to be covered by Grundfos warranty
only through the remainder of the original warranty period set
forth by the original purchase date.
2. General information
2.1 Hazard statements
The symbols and hazard statements below may appear in
Grundfos installation and operating instructions, safety
instructions and service instructions.
The hazard statements are structured in the following way:
2.2 Notes
The symbols and notes below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
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.
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.

English (US)
6
2.3 Safety symbols on the pump
3. Receiving the product
3.1 Inspecting the product
Check that the product received 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
7.4.1 Nameplate.
3.2 Scope of delivery
3.2.1 Terminal-connected single-head pump
The box contains the following items:
• MAGNA3 pump
• insulating shells
•gaskets
• quick guide
• safety instructions
• box with terminal and cable glands
• conduit adapter, 20 mm to 1/2" NPT.
3.2.2 Terminal-connected twin-head pump
The box contains the following items:
• MAGNA3 pump
•gaskets
• quick guide
• safety instructions
• two boxes with terminals and cable glands
• conduit adapter, 20 mm to 1/2" NPT.
3.2.3 Wire-to-wire-connected single-head pump
The box contains the following items:
• MAGNA3 pump
• insulating shells
•gaskets
• quick guide
• safety instructions.
Check the position of the clamp before you tighten it.
Incorrect position of the clamp will cause leakage
from the pump and damage the hydraulic parts in the
pump head.
Fit and tighten the screw that holds the clamp to 6 ±
0.7 ft-lbs (8 ± 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.
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 8159 2013
8Nm!
TM06 6791 2316TM07 0355 1018

7
English (US)
3.3 Lifting the pump
Always lift directly on the pump head or the cooling fins when
handling the pump. See fig. 1.
For large pumps, it may be necessary to use lifting equipment.
Position the lifting straps as illustrated in fig. 1.
Fig. 1 Correct lifting of the pump
Fig. 2 Incorrect lifting of the pump
4. Installing the product
4.1 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
MAGNA3. However, it is important that the pump is not installed
directly in these environments.
To ensure sufficient 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 104 °F (40 °C).
Observe local regulations concerning limits for
manual lifting or handling.
TM05 5820 3216
Do not lift the pump head by the control box, i.e. the
red area of the pump. See fig. 2.
TM05 5821 3216

English (US)
8
4.2 Tools
Fig. 3 Recommended tools
4.3 Insulating shells
Pumps for heating systems are factory-fitted with insulating
shells. Insulating shells are available for single-head pumps only.
Remove the insulating shells before you install the pump. See fig.
4.
Fig. 4 Removing insulating shells from the pump
As an alternative to insulating shells, you can insulate the pump
housing and pipes as illustrated in fig. 5, section 4.4 Mechanical
installation.
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 Wire cutter
7 Open-end wrench Depending on bolt size
8Pipewrench Only used for pumps with
unions
0.6 x 3.5
5.0
1.2 x 8.0
TX20
TX10
2
3
4
5
6
7
8
1
TM05 2859 3316
Insulating shells increase the pump dimensions.

9
English (US)
4.4 Mechanical installation
The pump range includes flanged versions.
Install the pump so that it is not stressed by the pipes. For
maximum permissible forces and moments for pipe connections
acting on the pump flanges, see Appendix.
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. The pump housing has an M12 thread.
To ensure adequate cooling of the motor and electronics, observe
the following requirements:
• Make sure that the control box is in horizontal position with the
Grundfos logo in vertical position. See 4.6 Control box
positions.
• The ambient temperature must not exceed 104 °F (40 °C).
As an alternative to insulating shells, you can insulate the pump
housing and pipes as illustrated in fig. 5.
Fig. 5 Insulation of the pump housing and pipe
4.5 Positioning the pump
Always install the pump with a horizontal motor shaft.
• Pump installed correctly in a vertical pipe. See fig. 6 (A).
• Pump installed correctly in a horizontal pipe. See fig. 6 (B).
• Do not install the pump with a vertical motor shaft. See fig. 6
(C and D).
Fig. 6 Pump installed with a horizontal motor shaft
Step Action Illustration
1
Arrows on the pump
housing indicate the
flow direction through
the pump. The flow
direction can be
horizontal or vertical,
depending on the
control box position.
TM05 8456 3216
2
Close the isolating
valves and make sure
that the system is not
pressurized during the
installation of the pump.
TM05 2863 3216
3Mount the pump with
gaskets in the pipes.
TM05 2864 3216
4
Flanged version:
Fit bolts and nuts. Use
the right size of bolts
according to system
pressure.
For further information
about torques, see
Appendix.
TM05 8455 3216
5 Fit the insulating shells.
TM05 2874 3216
Do not insulate the control box or cover the operating
panel.
TM05 2889 3216TM05 2866 3216
Step Action Illustration
BA
DC

English (US)
10
4.6 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. 7.
Fig. 7 Pump with the control box in horizontal position
Fig. 8 Automatic vent
4.7 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
centered. See figures 9 and 10.
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. 11.
Fig. 9 Correctly centered sealing system
Fig. 10 Incorrectly centered sealing system
TM05 2915 3216
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. 8.
TM05 6061 3216
TM05 6650 3216TM05 665132162
Observe 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. 11.

11
English (US)
Fig. 11 Fitting the pump head to the pump housing
4.8 Changing the control box position
TM05 5837 3216
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
Crushing of feet
Minor or moderate personal injury
- Do not drop the pump head when loosening the
clamp.
CAUTION
Pressurized system
Minor or moderate personal injury
- Pay special attention to any escaping vapor
when loosening the clamp.
Fit and tighten the screw that holds the clamp to 6 ±
0.7 ft-lbs (8 ± 1 Nm). Do not apply more torque than
specified even though water is dripping from the
clamp. The condensation 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!
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 3216
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 2868 3216
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 2869 3216
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 0612
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 3216
5.0

English (US)
12
4.9 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.
• If rigid conduit is to be used, the hub must be connected to the
conduit system before it is connected to the terminal box of the
pump.
• Make sure that the pump is connected to an external main
disconnect switch.
• The pump requires no external motor protection. When
switched on via the power supply, the pump starts pumping
after approximately 5 seconds.
4.9.1 Supply voltage
1 x 115-230 V ± 10 %, 60 Hz*, PE. Check that the supply voltage
and frequency correspond to the values stated on the nameplate.
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.
* All MAGNA3 pumps are approved to run on both 50 and 60
Hz.
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 3216
5
Fit and tighten the
screw that holds
the clamp to 6 ± 0.7
ft-lbs (8 ± 1 Nm).
Do not retighten the
screw if
condensation is
dripping from the
clamp.
TM05 2872 0612
6Fit the insulating
shells.
TM05 2874 3216
Step Action Illustration
8 Nm5.0
WARNING
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 disconnect switch to the Off
position.
Type and requirements as specified in national,
state, and local regulations.
WARNING
Electric shock
Death or serious personal injury
- Connect the pump to an external main
disconnect switch with a minimum contact gap of
1/8 inch (3 mm) in all poles.
- The ground terminal of the pump must be
connected to ground. Use grounding or
neutralization for protection against indirect
contact.
WARNING
Electric shock
Death or serious personal injury
- Use a suitable type of Ground Fault Circuit
Interrupter (GFCI) capable of handling ground
fault currents with a DC content (pulsating DC).
- If the pump is connected to an electrical
installation where a GFCI is used for additional
protection, this GFCI must be able to trip when
ground fault currents with DC content occur.

13
English (US)
4.10 Connecting the power supply
Step Action Illustration
1
Remove the
front cover
from the
control box.
Do not remove
the screws
from the
cover.
TM05 2875 3416
2
Locate the
power supply
plug and cable
gland in the
small
cardboard box
supplied with
the pump.
TM05 2876 34163
3
Connect the
cable gland to
the control
box.
TM05 2877 3416
4
Pull the power
supply cable
through the
cable gland.
TM05 2878 3416
5
Strip the cable
conductors as
illustrated.
TM06 9083 3817
6
Connect the
cable
conductors to
the power
supply plug.
TM06 9084 3817
0.28 in. (7 mm)
0.79 in. (20 mm)
0.28 in. (7 mm)
0.79 in. (20 mm)
0.28 in. (7 mm)
1.0 in. (25 mm)
0.28 in. (7 mm)
1.0 in. (25 mm)
Min. Ø 0.28 in. (7 mm)
Max. Ø 0.56 in. (14 mm)
Min. Ø 0.28 in. (7 mm)
Max. Ø 0.56 in. (14 mm)
230 V
115 V
230 V
115 V
7
Insert the
power supply
plug into the
male plug in
the pump
control box.
TM06 9085 3817
8
Tighten the
cable gland.
Fit the front
cover.
TM06 9086 3817

English (US)
14
4.10.1 Wiring diagrams
Fig. 12 Example of a terminal-connected motor with main disconnect switch, backup fuse and additional protection
Fig. 13 Example of wire-to-wire-connected motor with main disconnect switch, backup fuse and additional protection
Ground fault circuit interrupter (GFCI)
TM03 2397 3216TM07 1415 1618
L
N
L
N
External switch
Fuse
GFCI
GFCI
Fuse
External switch
WARNING
Electric shock
Death or serious personal injury
- Use a suitable type of GFCI capable of handling
ground fault currents with a DC content (pulsating
DC).
- If the pump is connected to an electrical
installation where a GFCI is used for additional
protection, this GFCI must be able to trip when
ground fault currents with DC content occur.
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
167 °F (75 °C).
Install all cables in accordance with the National
Electrical Code, or in Canada, the Canadian
Electrical Code, and state and local regulations.

15
English (US)
5. Starting up the product
5.1 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 14. Disposing of
the product.
The pump is self-venting through the system, and the system
must be vented at the highest point.
The number of starts and stops via the power
supply must not exceed four times per hour.
Step Action Illustration
1
Switch on the power supply to the pump.
The pump has been factory set to
"AUTOADAPT" mode, which starts after
approximately 5 seconds.
TM05 2884 0612
2
Operating panel at first startup.
After a few seconds, the pump display
changes to the startup guide.
TM05 2885 3216
3
The startup guide guides you through the
general settings of the pump, such as
language, date and time.
If you do not touch the buttons on the
operating panel for 15 minutes, the
display goes into sleep mode. When you
touch a button, the "Home" display
appears.
TM05 2886 3216
0/Off
1/On

English (US)
16
5.2 Twin-head pump
The pumps are paired from factory. When switching on the power
supply, the heads will establish connection. Please allow
approximately 5 seconds for this to happen.
If you have not connected both pump heads to the power supply,
warning 77 appears in the display. See fig. 14.
Connect the second pump head, and restart the pump. Once both
pumps are on, the pump heads will establish connection and the
warning deactivates.
Fig. 14 Warning 77
See sections 8.11.3 Digital inputs, 8.11.2 Relay outputs and
8.5 Multipump modes for additional twin-head pump setup
options.
5.2.1 Configuring twin-head pumps
If you replace a pump head of a twin-head pump, the twin-head
pump will function as two single pumps until you have configured
the pump heads and warning 77 is shown in the pump display.
See fig. 14.
To establish communication between the pump heads, run the
multipump setup via the "Assist" menu. The pump from which you
run the setup will be the master pump. See section
9.7.3 "Multipump setup".
4
When you have made the general
settings, select the desired control mode
or let the pump run in AUTOADAPT mode.
For additional settings, see section
8. Control functions.
TM05 2887 3216
TM05 8894 28132.1.5.1.0.0 Status

17
English (US)
6. 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 3.3 Lifting the pump.
7. Product introduction
MAGNA3 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 pump operating panel.
7.1 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.
7.2 Pumped liquids
The pump is suitable for thin, clean, non-aggressive and
non-explosive liquids, not containing solid particles or fibers 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.
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 149 °F (65 °C) to eliminate the risk of
lime precipitation.
7.2.1 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 % ethylene-glycol
mixture at 50 °F (-10 °C).
The pump has a power-limiting function that protects it against
overload.
The pumping of water-ethylene-glycol mixtures affects the
maximum curve and reduces the performance, depending on the
water-ethylene-glycol mixture and the liquid temperature.
To prevent the ethylene-glycol mixture from degrading, avoid
temperatures exceeding the rated liquid temperature and
minimize the operating time at high temperatures.
Clean and flush the system before you add the ethylene-glycol
mixture.
To prevent corrosion or lime precipitation, maintain the
ethylene-glycol mixture regularly. If further dilution of the supplied
ethylene-glycol is required, follow the glycol supplier's
instructions.
Fig. 15 Pumped liquids, flanged version
If the pump is not used during periods of freezing
temperatures, protect the pump and pipes from
freeze and burst damage.
Observe local regulations concerning limits for
manual lifting or handling.
Observe local legislation 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.
TM07 0365 1318
Max. 95 % RH
Enclosure Type 2

English (US)
18
7.3 Pump heads in twin-head pumps
The twin-head pump housing has a flap valve on the outlet side.
The flap valve seals off the port of the idle pump housing to
prevent the pumped liquid from running back to the inlet side. See
fig. 16. Due to the flap valve, there is a difference in the
hydraulics between the two pump heads. See fig. 17.
Fig. 16 Twin-head pump housing with flap valve
Fig. 17 Hydraulic difference between the two pump heads
7.4 Identification
7.4.1 Nameplate
Fig. 18 Example of the nameplate
* Example of production code: 1326. The pump was produced in
week 26, 2013.
Fig. 19 Production code on the packaging
TM06 1565 2514TM06 1566 2514
H
Q
Right pump head
Left pump head
TM06 9946 4017
Pos. Description
1 Product name
2 Model
3 Production code, year and week*
4 Serial number
5 Product number
6 Energy Efficiency Index (EEI)
7 Part (according to EEI)
8 Minimum current [A]
9 Maximum current [A]
10 Minimum power [W]
11 Maximum power [W]
12 Maximum system pressure
13 Voltage [V] and frequency [Hz]
14 QR code
15 Approvals
16 Assembled in USA
TM06 7998 4316
XXX
XXXX
X.XX
XXXX
X.XX
xxxxxxxxxxxxxxxxxx
XXXXXXXXXXXXXXXXXXXXXXXX
PC:
S/N:
P/N:
XXXX
XXXXXXXX
XXXXXXXX
Max.
Min.
I1[A] P1[W] PSI
TYPE 2
BOITIER DE TYPE 2
X
Part
X.XX
((,á
Model: X
Grundfos Holding A/S, USA - Fresno, California 93727
WARNING:
RISK OF ELECTRIC SHOCK. DE-ENERGIZE EQUIPMENT BEFORE REMOVAL OF COVER & SERVICING. FOR SUPPLY
CONNECTION USE COPPER WIRE SUITABLE FOR 75°C OR EQUIVALENT. THIS PUMP HAS NOT BEEN INVESTIGATED FOR
USE IN SWIMMING POOL OR MARINE AREAS. TO REDUCE THE RISK OF ELECTRIC SHOCK, SEE INSTRUCTION MANUAL
FOR PROPER INSTALLATION; ACCEPTABLE FOR INDOOR USE ONLY
AVERTISSEMENT:
RISQUE DE CHOC ÉLECTRIQUE. Mettre l'équipement HORS TENSION AVANT d'enlever le couvercle et/ou de procéder à l'entretien.
Pour le RACCORDEMENT, UTILISER UN FIL DE CUIVRE pouvant supporter une temperature de 75° C ou équivalent. Cette pompe N'A
PAS ÉTÉ TESTÉE pour utilisation dans des ZONES MARINES OU PRES D'UNE PISCINE. POUR RÉDUIRE LE RISQUE DE CHOC
ÉLECTRIQUE, consulter le manuel d'instructions pour une installation adéquate; ACCEPTABLE pour un usage intérieur SEULEMENT.
Assembled In USA
THERMALLY PROTECTED
For use with maximum 230 F water
Nonsubmersible Pump
3191277
12345 6 7 8 910 11 12 13 14
16
15

19
English (US)
7.4.2 Type key
7.5 Model type
These installation and operating instructions describe MAGNA3
model D. The model version is stated on the nameplate. See fig.
20.
Fig. 20 Model type on the product
Code Example MAGNA3 (D) 80 -120 (F) (N) 360
Type range
MAGNA3
D
Single-head pump
Twin-head pump
Nominal diameter (DN) of inlet and outlet ports [mm]
Maximum head [dm]
FPipe connection Flange
N
Pump housing material
Cast iron
Stainless steel
Port-to-port length [mm]
TM06 7734 3916

English (US)
20
7.6 Radio communication
GRUNDFOS HOLDING A/S
RADIOMODULE 2G4
CONTAINS FCC ID: OG3-RADIOM01-2G4
CONTAINS IC: 10447A-RA2G4M01
This device complies with part 15 of the FCC Rules and Licence
exempts RSSs of IC rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation of the device.
USA, CLASS B product (domestic use / public access)
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
Canada
Complies with the Canadian ICES-003 Class B specifications.
This Class B device meets all the requirements of the Canadian
interference-causing equipment regulations.
Intended use
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.
7.7 Insulating shells
Insulating shells are available for single-head pumps only and are
supplied with pumps for heating systems. The fitting of insulating
shells increases the pump dimensions.
7.8 Check valve
If a check valve is fitted in the pipe system, make sure 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 Check valve
7.9 Closed-valve operation
MAGNA3 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.
Limit the heat loss from the pump housing and
pipes. See section 4.3 Insulating shells and
4.4 Mechanical installation.
TM05 3055 0912
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.