Grundfos MAGNA3 25-100 (N) User manual

GRUNDFOS INSTRUCTIONS
MAGNA3
Installation and operating instructions

2

3
Table of contents
MAGNA3
English (US)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Español (MX)
Instrucciones de instalación y funcionamiento . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Français (CA)
Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

English (US)
4
English (US) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Limited warranty 5
2. Symbols used in this document 5
3. General information 6
3.1 Applications 6
3.2 Pumped liquids 6
3.3 Operating conditions 7
3.4 Frost protection 7
3.5 Insulating shells 7
3.6 Non-return valve 7
3.7 Nameplate 8
3.8 Radio communication 9
3.9 Tools 9
4. Mechanical installation 9
4.1 Installing the pump 9
4.2 Positioning 10
4.3 Control box positions 10
4.4 Pump head position 10
4.5 Changing the control box position 11
5. Electrical installation 12
5.1 Supply voltage 13
5.2 Connection to the power supply (models 40-XX,
50-XX, 65-XX, 80-XX, 100-XX) 13
5.3 Connection to the power supply (models 32-XX) 14
5.4 Connection diagram 15
5.5 Input/output communication 17
5.6 Analog input for external sensor 19
5.7 Electrical connection for external sensor 20
5.8 Priority of settings 20
6. First start-up 21
7. Settings 22
7.1 Overview of settings 22
8. Menu overview 23
9. Control panel 24
10. Menu structure 24
11. "Home" menu 24
12. "Status" menu 25
13. "Settings" menu 25
13.1 Setpoint 25
13.2 Operating mode 26
13.3 Control mode 26
13.4 FLOWLIMIT 30
13.5 Automatic Night Setback 30
13.6 Relay outputs 31
13.7 Setpoint influence 31
13.8 Bus communication 32
13.9 General settings 32
14. "Assist" menu 36
14.1 Assisted pump setup 36
14.2 Setting of date and time 36
14.3 Multi-pump setup 36
14.4 Setup, analog input 36
14.5 Description of control mode 36
14.6 Assisted fault advice 36
14.7 Wireless GENIair 36
14.8 Multi-pump function 36
15. Selection of control mode 37
16. Fault finding 39
16.1 Grundfos Eye operating indications 39
16.2 Signalling communication with remote control 39
16.3 Fault finding 40
17. Sensor 41
17.1 Sensor specifications 41
18. Accessories 42
18.1 Grundfos GO Remote 42
18.2 Communication 42
18.3 Fitting the CIM module 45
19. Technical data 46
20. Disposal 46
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
The use of this product requires experience with
and knowledge of the product.
Persons with reduced physical, sensory or
mental capabilities must not use this product,
unless they are under supervision or have been
instructed in the use of the product by a person
responsible for their safety.
Children must not use or play with this product.

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 24 months
from date of installation, but not more than 30 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 which 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.
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 limit actions 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.
2. Symbols used in this document
Warning
If these safety instructions are not observed,
it may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Warning
The surface of the product may be so hot that
it may cause burns or personal injury.
Warning
Risk of dropping objects which may cause
personal injury.
Warning
Escaping vapor involves the risk of personal
injury.
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Note
Note
Notes or instructions that make the job easier
and ensure safe operation.

English (US)
6
3. General information
The Grundfos 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 will reduce the power consumption considerably,
reduce noise from thermostatic radiator valves and similar fittings
and improve the control of the system.
The desired head can be set on the pump control panel.
3.1 Applications
The Grundfos MAGNA3 is designed for circulating liquids in the
following systems:
• heating systems
• domestic hot-water systems
• air-conditioning and cooling systems.
The pump can also be used in the following systems:
• ground source heat pump systems
• solar-heating systems.
3.2 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 should meet the requirements of
accepted standards on water quality in heating systems.
In domestic hot-water systems, we recommend to use MAGNA3
pumps only for water with a degree of hardness lower than
approx. 14 °dH.
In domestic hot-water systems, we recommend to keep the liquid
temperature below 150 °F (+65 °C) to eliminate the risk of lime
precipitation.
Fig. 1 Pumped liquids
3.2.1 Glycol
The pump can be used for pumping water/glycol mixtures up to
50 %.
Example of a water/ethylene glycol mixture:
Maximum viscosity: 50 cSt ~ 50 % water / 50 % ethylene glycol
mixture at +14 °F (-10 °C).
The pump has a power-limiting function that protects against
overload.
The pumping of glycol mixtures will affect the max. curve and
reduce 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.
It is important to clean and flush the system before the ethylene
glycol mixture is added.
To prevent corrosion or lime precipitation, check and maintain the
ethylene glycol mixture regularly. If further dilution of the supplied
ethylene glycol is required, follow the glycol supplier's
instructions.
Warning
Do not use the pump for flammable liquids, such
as diesel oil and gasoline.
Warning
Do not use the pump for aggressive liquids, such
as acids and sea water.
TM05 2857 0612
Note
Note
Additives with a density and/or kinematic
viscosity higher than those/that of water will
reduce the hydraulic performance.
Max. 95 % RH
Enclosure Type 2

7
English (US)
3.3 Operating conditions
Fig. 2 Operating conditions
3.3.1 Liquid temperature
See fig. 2, pos. 1.
Continuously: +14 °F to +230 °F (-10 °C to +110 °C).
Domestic hot-water systems:
• Up to +150 °F (+65 °C).
3.3.2 System pressure
See fig. 2, pos. 2.
The maximum permissible system pressure is stated on the pump
nameplate.
3.3.3 Ambient temperature
See fig. 2, pos. 3.
+32 °F to +104 °F (0 °C to +40 °C).
The control box is air-cooled. Therefore, it is important that the
maximum permissible ambient temperature is not exceeded
during operation.
During transport: -40 °F to +158 °F (-40 °C to +70 °C).
3.3.4 Sound pressure level
See fig. 2, pos. 4.
The sound pressure level of the pump is lower than 43 dB(A).
3.3.5 Approvals
• Conforms to ANSI/UL Standard 778.
• Certified to CAN/CSA Standard C22.2 No. 108.
• The protective earth (ground) symbol identifies any
terminal which is intended for connection to an external
conductor for protection against electric shock in case of a
fault, or the terminal of a protective earth (ground) electrode.
3.4 Frost protection
3.5 Insulating shells
Insulating shells are available for single-head pumps only.
The heat loss from the pump and pipework can be reduced by
insulating the pump housing and the pipework. See fig. 3and
fig. 13.
• Insulating shells for pumps in heating systems are supplied
with the pump; see fig. 3.
• For pumps in air-conditioning and cooling systems (down to
+14 ° (-10 °C)) it is required to apply a silicon sealant to the
internal contours of the shell in order to eliminate any air gaps
and prevent condensation between the insulation shell and
pump housing. Alternatively, the pump can also be insulated
manually in accordance with standard insulating requirements
for heating and cooling systems (fig. 13).
The fitting of insulating shells will increase the pump dimensions.
Fig. 3 Fitting insulating shells to the pump
3.6 Non-return valve
If a non-return valve is fitted in the pipe system (fig. 4), it must be
ensured that the set minimum discharge pressure of the pump is
always higher than the closing pressure of the valve. This is
especially important in proportional-pressure control mode
(reduced head at low flow). The closing pressure of a single
non-return valve is accounted for in the pump settings as the
minimum head delivered is 5 ft (1.5 m).
Fig. 4 Non-return valve
TM05 7662 1413
Caution
If the pump is not used during periods of frost,
necessary steps must be taken to prevent frost
bursts.
Note
Note
Additives with a density and/or kinematic
viscosity higher than those/that of water will
reduce the hydraulic performance.
Min./Max. +14 °F - 230 °F
(-10 °C - +110 °C)
175 psi (12 bar)
1
2
3
4
+32 to +104 °F
(0 to +40 °C)
< 43 dB(A)
Note
Note
Limit the heat loss from the pump housing and
pipework.
TM05 2859 0612
Caution
Do not insulate the control box or cover the
control panel.
TM05 3055 0912

English (US)
8
3.7 Nameplate
The pump nameplate provides the following information:
Fig. 5 Example of nameplate
TM05 6381 4612
RISQUE DE CHOC ELECTRIQUE. HORS DES EQUIPEMENT AVANT ENLEVEMENT DE LA COUVERTURE ET D’ENTRENTIEN. POUR
LE RECCORDEMENT D’ALIMENTATION, EMPLOYEZ DES FILS QUI RESISTENT AU MOINS A 90 °C UTILISEZ UNIQUEMENT DES
CONDUCTEURS DE CUIVRE. POUR RE’DUIRE LES RISQUES DE CHOC E’LECTRIQUE, CONSULTES LE MANUEL D’INSTRUCTIONS
POUR UNE INSTALLATION CORRECTE. EMPLOYER UNIQUEMENT A L’INTERIEUR.
TYPE 2
BOITIER DE TYPE 2
THERMALLY PROTECTED
Nonsubmersible Pump
RISK OF ELECTRIC SHOCK. DE-ENERGIZE EQUIPMENT BEFORE REMOVAL OF COVER & SERVICING. FOR SUPPLY
CONNECTION USE COPPER WIRE SUITABLE FOR 90 °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.
PSI
For use with maximum 230° F water
Contains FCC ID: OG3-RADIOM01-2G4
Pos. Description
1 Product name
2 Model
3 Production code (year and week)
4 Serial number
5 Product number
6 Enclosure type
7 Energy Efficiency Index (EEI)
8 Part (according to EEI)
9 TF-class
10 Minimum current [A]
11 Maximum current [A]
12 Minimum power [W]
13 Maximum power [W]
14 Maximum pressure
15 Voltage [V] and frequency [Hz]
16 QR (Quick Response) code
17 Approvals (nameplate)
18 Assembled in USA

9
English (US)
3.8 Radio communication
The wireless radio in this product is class B.
Intended use
This product incorporates a radio for remote control.
The product can communicate with Grundfos Go Remote and
with other MAGNA3 pumps of the same type via the built-in radio.
Only Grundfos-approved external antennae may be connected to
this product, and only by a Grundfos-approved installer.
3.9 Tools
Fig. 6 Recommended tools
4. Mechanical installation
4.1 Installing the pump
MAGNA3 is designed for indoor installation.
The pump must be installed in such a way that it is not stressed
by the pipework.
The pump may be suspended direct in the pipes, provided that
the pipework can support the pump.
Twin-head pumps are prepared for installation on a mounting
bracket or base plate.
To ensure adequate cooling of motor and electronics, the
following must be observed:
• Position the pump in such a way that sufficient cooling is
ensured.
• The temperature of the ambient air must not exceed +104 °F
(+40 °C).
TM05 6472 4712
Pos. Tool Size
1 Screwdriver, straight slot 1.2 x 8.0 mm
2 Screwdriver, straight slot 0.6 x 3.5 mm
3 Screwdriver, torx bit TX20
4 Hexagon key 5.0 mm
5 Open-end wrench Depending on flange bolt
size
6 Wire cutter
7Pipewrench
1.2 x 8.0 TX200.6 x 3.5 5.0
1234
567
Warning
Observe local regulations setting limits for
manual lifting or handling.
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 2862 0612
2
Close the isolating valves and
make sure that the system is not
pressurized during the
installation of the pump.
TM05 2863 0612
3Mount the pump with gaskets in
the pipework.
TM05 2864 0612
4
Fit bolts and nuts. Use the right
size of bolts according to system
pressure.
TM05 2865 0612

English (US)
10
4.2 Positioning
Always install the pump with horizontal motor shaft.
• Pump installed correctly in a vertical pipe. See fig. 7, pos. A.
• Pump installed correctly in a horizontal pipe. See fig. 7, pos. B.
• Do not install the pump with vertical motor shaft. See fig. 7,
pos. C and D.
Fig. 7 Pump installed with horizontal motor shaft
4.3 Control box positions
To ensure adequate cooling, the control box must be in horizontal
position with the Grundfos logo in vertical position. See fig. 8.
Fig. 8 Pump with control box in horizontal position
If the pump head is removed before the pump is installed in the
pipework, pay special attention when fitting the pump head to the
pump housing:
1. Gently lower the pump head with rotor shaft and impeller into
the pump housing.
2. Make sure that the contact face of the pump housing and that
of the pump head are in contact before the clamp is tightened.
See fig. 9.
Fig. 9 Fitting the pump head to the pump housing
4.4 Pump head position
If the pump head is removed before the pump is installed in the
pipework, pay special attention when fitting the pump head to the
pump housing:
3. Visually check that the floating ring in the sealing system is
centered. See figs. 10 and 11.
4. Gently lower the pump head with rotor shaft and impeller into
the pump housing.
5. Make sure that the contact face of the pump housing and that
of the pump head are in contact before the clamp is tightened.
See fig. 12.
Fig. 10 Correctly centered sealing system
TM05 2866 0712TM05 2915 0612
AB
CD
TM05 5837 4112TM05 6650 5012

11
English (US)
Fig. 11 Incorrectly centered sealing system
Fig. 12 Fitting the pump head to the pump housing
4.5 Changing the control box position
TM05 6651 5012
Caution
Observe the position of the clamp before the
clamp is tightened. Incorrect position of the
clamp will cause leakage from the pump and
damage the hydraulic parts in the pump head.
See fig. 12.
TM05 5837 4112
Warning
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.
Warning
When loosening the clamp, do not drop the pump
head.
Warning
Risk of escaping vapor.
Step Action Illustration
1
Loosen the screw in the clamp
holding the pump head and pump
housing together.
Warning: If the screw is loosened
too much, the pump head will be
completely disconnected from the
pump housing.
TM05 2867 0612
2
Carefully rotate 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 0612
3
Position the control box in
horizontal position so that the
Grundfos logo is in vertical
position. The motor shaft must be
horizontal.
TM05 2869 0612
4
Due to the drain hole in the stator
housing, position the gap of the
clamp as shown in step 4a, 4b, 4c
or 4d.
TM05 2870 0612
4a
Single-head pump.
Position the clamp so that the gap
points towards the arrow.
It can be in position 3 or 9 o'clock.
TM05 2918 0612 - TM05 2871 0612

English (US)
12
Fig. 13 Insulation of pump housing and pipework
5. 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.
• The pump must be connected to an external mains 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 will start
pumping after approx. 5 seconds.
4b
Single-head pump.
Note: The gap of the clamp can
also be in position 6 o'clock for the
following pump sizes:
• MAGNA3 65-XX
• MAGNA3 80-XX
• MAGNA3 100-XX.
TM05 2899 1912
4c
Twin-head pump.
Position the clamps so that the
gaps point towards the arrows.
They can be in position 3 or
9o'clock.
TM05 2917 0612 - TM05 2873 0612
4d
Twin-head pump.
Note: The gap of the clamp can
also be in position 6 o'clock for the
following pump sizes:
• MAGNA3 65-XX
• MAGNA3 80-XX
• MAGNA3 100-XX.
TM05 2897 1912
6
Fit and tighten the screw holding
the clamp to minimum
6 ± 0.7 ft-lbs (8 ± 1 Nm).
TM05 2872 0612
7
Fit the insulating shells.
Note: For air conditioning and
cooling systems a silicone sealant
must be applied inside the
insulation shell to eliminate all air
gaps and prevent condensation
between the pump housing and
insulation shell. Alternatively, the
pump may be insulated manually
in accordance with standard
insulation practices for cooling
applications.
TM05 2874 0412
Caution
If insulating the pump manually, do not insulate
the control box or cover the control panel.
TM05 5549 3812
Step Action Illustration
Warning
Never make any connections in the pump control
box unless the power supply has been switched
off for at least 5 minutes.
Warning
The pump must be connected to an external
mains switch with a contact separation of at least
1/8 inch (3 mm) in each pole.
The ground terminal of the pump must be
connected to ground. Grounding or
neutralization can be used for protection against
indirect contact.
If the pump is connected to an electric
installation where a Ground Fault Circuit
Interrupter (GFCI) is used as additional
protection, this circuit interrupter must trip out
when ground fault currents with DC content
(pulsating DC) occur.
Note
Note
The number of starts and stops via the power
supply must not exceed four times per hour.

13
English (US)
5.1 Supply voltage
1 x 115 V ± 10 %, 50/60 Hz, PE.
1 x 208-230 V ± 10 %, 50/60 Hz, PE.
See pump nameplate for rated supply voltage
The voltage tolerances are intended for mains voltage variations.
They should not be used for running pumps at other voltages than
those stated on the nameplate.
5.2 Connection to the power supply (models 40-XX,
50-XX, 65-XX, 80-XX, 100-XX)
Step Action Illustration
1
Remove the front
cover from the
control box.
TM05 2875 0612
2
Locate the power
supply plug and
conduit adapter in
the box supplied
with the pump.
TM05 2876 0612
3
Connect the
conduit adapter to
the control box.
TM05 2877 0612
4
Pull the power
supply cable
through the
conduit adapter.
TM05 2878 0612
5
Strip the cable
conductors as
illustrated.
TM05 5534 3812
6
Connect the cable
conductors to the
power supply plug.
L - L or L1
Ground - Ground
N - N or L2
TM05 2880 0612
7
Insert the power
supply plug into
the male plug in
the pump control
box.
TM05 2881 0612
8
Tighten the
conduit adapter.
Refit the front
cover.
TM05 2882 0612
Step Action Illustration

English (US)
14
5.3 Connection to the power supply (models 32-XX)
Step Action Illustration
1
Remove two
screws.
Remove the front
cover from the
control box and
access the power
connection.
TM06 1102 1614
2Locate the power
plug inside.
TM06 1103 1614
3
Connect the
conduit to the
control box.
Pull the power
supply cable
through the
conduit.
TM06 1104 1614
5
Strip the cable as
illustrated.
Connect the cable
conductors to the
power supply plug.
L - L or L1
Ground - Ground
N - N or L2
TM06 1105 1614
6
Insert the power
plug into its mating
connector.
Tighten the
conduit.
TM06 1106 1614
L (L1) N (L2)
7Refit the front
cover.
TM06 1107 1614
Step Action Illustration

15
English (US)
5.4 Connection diagram
Fig. 14 Example of typical connection, 1 x 230 V ± 10 %, 50/60 Hz
5.4.1 Connection to external controllers
Fig. 15 Example of connections in the control box
Concerning demands on signal wires and signal transmitters, see
section 19. Technical data.
Use screened cables for external on/off switch, digital input,
sensor and setpoint signals.
TM03 2397 0312
External switch
Fuse
(min. 10 A, time lag)
GFCI
Note
Note
All cables used must be connected in accordance with local regulations.
TM05 2673 3812
NC NO C NC NO C
NL
S/S
M
I
M
A
signal
sensor
Vcc
24V IN
Mains
connection
Alarm
Operation
Start/
stop On/off timer
Analog input
Warning
Wires connected to supply terminals, outputs
NC, NO, C and start/stop input must be separated
from each other and from the supply by
reinforced insulation.
Note
Note
All cables used must be heat-resistant up to
+185 °F (+85 °C).

English (US)
16
Fig. 16 Wiring diagram, 32-XX versions
The connection terminals of 32-XX versions differ from those of
terminal-connected versions, but they have the same function
and connection options.
Use screened cables for external on/off switch, digital input,
sensor and setpoint signals.
Connect screened cables to the ground connection as follows:
• Terminal-connected versions:
Connect the cable screen to ground via the digital-input
terminal (earth).
• Plug-connected versions:
Connect the cable screen to ground via cable clamp.
TM05 8539 2413
Warning
Wires connected to supply terminals, outputs
NC, NO, C and start/stop input must be separated
from each other and from the supply by
reinforced insulation.
Note
Note
All cables used must be heat-resistant up to
+85 °C.
All cables used must be installed in accordance
with EN 60204-1 and EN 50174-2:2000.

17
English (US)
5.5 Input/output communication
• Relay outputs
Alarm, ready and operating indication via signal relay.
• Digital input
– Start/Stop (S/S)
– Min. curve (MI)
– Max. curve (MA).
• Analog input
0-10 V or 4-20 mA control signal.
To be used for external control of the pump or as sensor input
for the control of the external setpoint.
The 24 V supply from pump to sensor is optional and is
normally used when an external supply is not available.
5.5.1 Relay outputs
See fig. 15, pos. 1.
The pump incorporates two signal relays with a potential-free
changeover contact for external fault indication.
The function of the signal relay can be set to "Alarm", "Ready" or
"Operation" on the pump control panel or with Grundfos GO
Remote.
The relays can be used for outputs up to 250 V and 2 A.
Fig. 17 Relay output
The functions of the signal relays appear from the table below:
TM05 3338 1212
Contact symbol Function
NC Normally closed
NO Normally open
C Common
NC NO C NC NO C
Alarm
Operation
Relay 1 Relay 2
Signal relay Alarm signal
Not activated:
• The power supply has been switched off.
• The pump has not registered a fault.
Activated:
• The pump has registered a fault.
Signal relay Ready signal
Not activated:
• The pump has registered a fault and is
unable to run.
Activated:
• The pump has been set to stop, but is ready
to run.
• The pump is running.
Signal relay Operating signal
Not activated:
• The pump is not running.
Activated:
• The pump is running.
132
NC NO C
132
NC NO C
12 3
NC NO C
132
NC NO C
132
NC NO C
12 3
NC NO C
132
NC NO C
132
NC NO C
12 3
NC NO C

English (US)
18
5.5.2 Digital inputs
See fig. 15, pos. 2.
The digital input can be used for external control of start/stop or
forced max. or min. curve.
If no external on/off switch is connected, the jumper between
terminals Start/Stop (S/S) and frame ( ) should be maintained.
This connection is the factory setting.
Fig. 18 Digital input
External start/stop
The pump can be started or stopped via the digital input.
External forced max. or min. curve
The pump can be forced to operate on the max. or min. curve via
the digital input.
Select the function of the digital input on the pump control panel
or with Grundfos GO Remote.
TM05 3339 1212
Contact symbol Function
M
A
Max. curve
100 % speed
M
I
Min. curve
25 % speed
S/S Start/Stop
Frame connection
Start/stop
Normal duty
Note: Factory setting with
jumper between S/S and .
Stop
S/S
M
I
M
A
On/off timer
Start/stop
S/S
Q
H
S/S
Q
H
Max. curve
Normal duty
Max. curve
Min. curve
Normal duty
Min. curve
M
A
Q
H
M
A
Q
H
M
I
Q
H
M
I
Q
H

19
English (US)
5.6 Analog input for external sensor
The analog input can be used for the connection of an external
sensor for measuring temperature or pressure.
The analog input can also be used for an external signal for the
control from a BMS system or similar control system.
The electrical signal for the input can be 0-10 VDC or 4-20 mA.
The selection of electrical signal (0-10 V or 4-20 mA) can be
changed on the control panel or with Grundfos GO Remote.
Fig. 19 Analog input for external sensor or control
In order to optimize the pump performance, external sensors can
advantageously be used in the following cases:
Fig. 20 Wiring, analog input
Fig. 21 Examples of external sensors
For further details, visit WebCAPS and reference Magna3 Data
booklet 98439208.
Fig. 22 Example of external signal for the control via BMS or
PLC
TM05 3221 1112
Function/control mode Sensor type
Heat energy meter Temperature sensor
Constant temperature Temperature sensor
Differential pressure Pressure sensor
TM06 0882 1114
PIN Description Load
IN Analog input 150 Ω(4-20 mA signal)
78 kΩ(0-10 V signal)
24 V 24 V supply to external sensor Max. 22 mA
Ground for external sensor
signal
sensor
Vcc
24V
I N
-+
Sensor
Sensor
TM05 2947 1212
Pos. Sensor type
1
Differential pressure transmitter,
Grundfos type DPI V.2
1/2" connection and 4-20 mA signal.
2
Relative pressure transmitter,
combined pressure and temperature sensor,
Grundfos type RPI/T G 1/2" connection and 4-20 mA
signal.
TM05 2888 0612
24V IN
Vcc Signal
1
2
24V
BMS
PLC

English (US)
20
5.7 Electrical connection for external sensor
Fig. 23 Example electrical connections for external sensor
* Common ground for both pressure and temperature signal.
* Power supply (screened cable): SELV or PELV.
5.8 Priority of settings
The external forced-control signals will influence the settings
available on the pump control panel or with Grundfos GO
Remote. However, the pump can always be set to max. curve
duty or to stop on the pump control panel or with Grundfos GO
Remote.
If two or more functions are enabled at the same time, the pump
will operate according to the setting with the highest priority.
The priority of the settings is as shown in the table below.
Example: If the pump has been forced to stop via an external
signal, the pump control panel or Grundfos GO Remote can only
set the pump to max. curve.
As illustrated in the table, the pump does not react to external
signals (max. curve and min. curve) when it is controlled via bus.
For further details, please contact Grundfos.
TM04 7156 1610
PIN 1 2 3 4
Wire color Brown Grey Blue Black
Output
4 to 20 mA + not used - not used
Output
2 x 0 to 10 V +Pressure
signal -* Temperature
signal
1
3
4
2
Priority
Possible settings
Pump control
panel or
Grundfos GO
Remote
External
signals Bus signal
1 Stop
2 Max. curve
3Stop
4Stop
5Max.curve
6Min.curve
7Start
8Max.curve
9Min.curve
10 Min. curve
11 Start