Grundfos CREC User manual

CREC, CRIEC, CRNEC, MTREC, CMEC
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

Table of contents
2
CREC, CRIEC, CRNEC, MTREC, CMEC
English (GB)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

English (GB)
3
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this document 4
1.1 Hazard statements 4
1.2 Notes 4
2. Abbreviations and definitions 4
3. General information 5
4. General description 5
4.1 Pumps without factory-fitted sensor 5
4.2 Pumps with factory-fitted pressure
sensor 5
4.3 Settings 5
4.4 Radio communication 5
5. Receiving the product 5
5.1 Transporting the product 5
5.2 Inspecting the product 5
6. Mechanical installation 6
6.1 Handling the product 6
6.2 Mounting 6
6.3 Cable entries 6
6.4 Cable glands 6
6.5 Ensuring motor cooling 6
6.6 Outdoor installation 6
6.7 Drain holes 7
7. Electrical installation 7
7.1 Protection against electric shock,
indirect contact 7
7.2 Cable requirements 7
7.3 Mains supply 8
7.4 Additional protection 8
7.5 Connection terminals 9
7.6 Signal cables 11
7.7 Bus connection cable 11
8. Operating conditions 11
8.1 Maximum number of starts and stops 11
8.2 Ambient temperature 11
8.3 Installation altitude 12
8.4 Humidity 12
8.5 Motor cooling 12
9. User interfaces 12
10. Basic operating panel 13
11. Grundfos GO Remote 13
11.1 Communication 13
11.2 Menu overview for Grundfos GO
Remote 14
12. Description of functions 16
12.1 Setpoint 16
12.2 Operating mode 16
12.3 Set manual speed 16
12.4 "Set user-defined speed" 16
12.5 "Control mode" 16
12.6 Analog inputs 17
12.7 Digital inputs 18
12.8 Signal relays (Relay outputs) 19
12.9 Operating range 20
12.10 External setpoint function 20
12.11 "Stop function" (Low-flow stop function) 21
12.12 Ramps 23
12.13 Alarm handling 23
12.14 ""Number" (Pump number) 23
12.15 "Radio communication" (Enable/disable
radio comm.) 23
12.16 "Unit configuration" (Units) 23
12.17 "Recall settings" (Recall stored settings) 23
12.18 "Pump name" 23
12.19 "Connection code" 24
12.20 Alarm log 24
12.21 Warning log 24
12.22 Assist 24
12.23 Assisted pump setup 24
12.24 Assisted fault advice 24
13. Bus signal 25
14. Priority of settings 25
15. Grundfos Eye 26
16. Signal relay 27
17. Installing a communication interface
module 28
18. Changing the position of the operating
panel 29
19. Servicing the product 31
19.1 Motor 31
19.2 Pump 31
20. Cleaning the product 31
21. Megging 31
22. Technical data, three-phase motors 31
22.1 Supply voltage 31
22.2 Leakage current (AC) 31
23. Inputs/outputs 31
24. Other technical data 32
24.1 Sound pressure level 33
25. Disposing of the product 33
Read this document before installing the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.

English (GB)
4
1. Symbols used in this document
1.1 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:
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
2. Abbreviations and definitions
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.
AI Analog input.
AL Alarm, out of range at lower limit.
AO Analog output.
AU Alarm, out of range at upper limit.
CIM Communication interface module.
Current
sinking
The ability to draw current into the
terminal and guide it towards GND in
the internal circuitry.
Current
sourcing
The ability to push current out of the
terminal and into an external load
which must return it to GND.
DI Digital input.
ELCB Earth leakage circuit breaker.
FM Functional module.
GENIbus Proprietary Grundfos fieldbus
standard.
GFCI Ground fault circuit interrupter.
(USA and Canada).
GND Ground.
Grundfos
Eye Status indicator light.
LIVE Low voltage with the risk of electric
shock if the terminals are touched.
PE Protective earth.
PELV
Protective extra-low voltage.
A voltage that cannot exceed ELV
under normal conditions and under
single-fault conditions, except earth
faults in other circuits.
RCD Residual-current device
SELV
Safety extra-low voltage.
A voltage that cannot exceed ELV
under normal conditions and under
single-fault conditions, including
earth faults in other circuits.

English (GB)
5
3. General information
These installation and operating instructions are a
supplement to the installation and operating
instructions for the corresponding standard pumps
CR, CRI, CRN, MTR and CM. For instructions not
mentioned specifically in this manual, see the
installation and operating instructions for the
standard pump.
4. General description
Grundfos E-pumps are fitted with
frequency-controlled permanent-magnet motors for
single-phase or three-phase mains connection.
4.1 Pumps without factory-fitted sensor
The pumps have a built-in PI controller and can be
set for an external sensor enabling the control of the
following parameters:
• constant pressure
• constant temperature
• constant curve
The pumps have been factory-set to constant-curve
control mode. You can change the control mode with
Grundfos GO Remote.
4.2 Pumps with factory-fitted pressure
sensor
The pumps have a built-in PI controller and are set
for a pressure sensor enabling the control of the
outlet pressure.
The pumps have been factory-set to
constant-pressure control mode. The pumps are
typically used to keep a constant pressure in
variable-demand systems.
4.3 Settings
The description of settings applies both to pumps
without factory-fitted sensor and to pumps with a
factory-fitted pressure sensor.
Setpoint
You can set the desired setpoint in two ways:
• via an input for external setpoint signal
• with Grundfos GO Remote.
Other settings
Make all other settings with Grundfos GO Remote.
You can read important parameters, such as the
actual value of the control parameter and power
consumption, via Grundfos GO Remote.
4.4 Radio communication
This product incorporates a radio module for remote
control which is a class 1 device and which you can
use anywhere in the EU without restrictions.
For use in USA and Canada, see page 34.
Some variants of the product and products sold in
China and Korea have no radio module.
This product can communicate with the Grundfos
GO Remote and other products of the same type via
the built-in radio module.
5. Receiving the product
5.1 Transporting the product
Do not stack more than two motors in their original
packaging.
5.2 Inspecting the product
Before you install the product, do the following.
1. Check that the product is as ordered.
2. Check that no visible parts have been damaged.
3. If parts are damaged or missing, contact your
local Grundfos sales company.
WARNING
Falling objects
Death or serious personal injury
- Secure the product during
transportation to prevent it from tilting or
falling down.
CAUTION
Crushing of feet
Minor or moderate personal injury
- Wear safety shoes when moving the
product.

English (GB)
6
6. Mechanical installation
6.1 Handling the product
Observe local regulations setting limits for manual
lifting or handling. The motor weight is stated on the
nameplate.
6.2 Mounting
6.3 Cable entries
See the size of the cable entries in section 24. Other
technical data.
6.4 Cable glands
The number and size of cable glands delivered with
the pump depends on the motor size. See section
24. Other technical data.
6.5 Ensuring motor cooling
Leave at least 50 mm between the end of the fan
cover and a wall or other fixed objects. See fig. 1.
Fig. 1 Minimum distance (D) from the motor to
a wall or other fixed objects
6.6 Outdoor installation
If you install the motor outdoors, provide the motor
with a suitable cover and open the drain holes to
avoid condensation on the electronic components.
See figs 2 and 3.
The cover must be sufficiently large to ensure that
the motor is not exposed to direct sunlight, rain or
snow. Grundfos does not supply covers. We
therefore recommend that you have a cover built for
the specific application. In areas with high humidity,
we recommend that you connect the motor
permanently to the mains supply and activate the
built-in standstill heating function.
Fig. 2 Examples of covers (not supplied by
Grundfos)
CAUTION
Back injury
Minor or moderate personal injury
- Use lifting equipment.
CAUTION
Crushing of feet
Minor or moderate personal injury
- Wear safety shoes and attach lifting
equipment to the motor eyebolts when
handling the product.
Do not lift the product by the terminal box.
CAUTION
Crushing of feet
Minor or moderate personal injury
- Secure the product to a solid foundation
by bolts through the holes in the flange
or the base plate.
In order to maintain the UL mark,
additional requirements apply to the
equipment. See page 34.
TM05 5236 3512
When fitting a cover to the motor, observe
the guideline in section 6.5 Ensuring motor
cooling.
TM05 3496 3512
In order to maintain the UL mark,
additional requirements apply to the
equipment. See page 34.
D

English (GB)
7
6.7 Drain holes
When the motor is installed in moist surroundings or
areas with high humidity, the bottom drain hole must
be open. The enclosure class of the motor will then
be lower. This helps prevent condensation in the
motor as the motor becomes self-venting, and it
allows water and humid air to escape.
The motor has a plugged drain hole on the drive
side. You can turn the flange 90 ° to both sides or
180 °.
Fig. 3 Drain holes
7. Electrical installation
If the power cable is damaged, it must be replaced
by the manufacturer, the manufacturer's service
partner or a similarly qualified person.
The user or the installer is responsible for the
installation of correct earthing and protection
according to local regulations. All operations must be
carried out by a qualified electrician.
7.1 Protection against electric shock,
indirect contact
Protective-earth conductors must always have a
yellow and green (PE) or yellow, green and blue
(PEN) colour marking.
7.1.1 Protection against mains voltage transients
The motor is protected against mains voltage
transients in accordance with EN 61800-3.
7.1.2 Motor protection
The motor requires no external motor protection. The
motor incorporates thermal protection against slow
overloading and blocking.
7.2 Cable requirements
7.2.1 Cable cross-section
3 x 380-480 V
TM02 9037 1604
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply to the motor
and to the signal relay. Wait at least 5
minutes before you make any
connections in the terminal box. Make
sure that the power supply cannot be
accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
- Check that the supply voltage and
frequency correspond to the values
stated on the nameplate.
B3 B14 B5
WARNING
Electric shock
Death or serious personal injury
- Connect the motor to protective earth
and provide protection against indirect
contact in accordance with local
regulations.
DANGER
Electric shock
Death or serious personal injury
- Always comply with local regulations as
to cable cross-sections.
Power
[kW]
Conductor
type
Cross section
[mm2][AWG]
0.25 - 2.2 Solid 1.5 - 10 16-8
Stranded 1.5 - 10 16-8
3.0 - 5.5 Solid 2.5 - 10 14-8
Stranded 2.5 - 10 14-8

English (GB)
8
7.2.2 Conductors
Type
Stranded or solid copper conductors.
Temperature rating
Temperature rating for conductor insulation: 60 °C
(140 °F).
Temperature rating for outer cable sheath: 75 °C
(167 °F).
7.3 Mains supply
7.3.1 Three-phase supply voltage
Three-phase motors are available for the voltages
below:
• 3 x 380-480 V - 10 %/+ 10 %, 50/60 Hz, PE
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
The wires in the motor terminal box must be as short
as possible. Excepted from this is the separated
protective-earth conductor which must be so long
that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
In order to avoid loose connections, make sure that
you have pressed home the terminal block for L1, L2
and L3 in its socket when you connect the supply
cable.
For maximum backup fuse, see section
22. Technical data, three-phase motors.
Fig. 4 Example of a mains-connected motor
with main switch, backup fuses and
additional protection
Fig. 5 Mains connection, three-phase motors
7.4 Additional protection
The residual-current circuit breaker must be marked
with the following symbol:
The total leakage current of all the electrical
equipment in the installation must be taken into
account. You find the leakage current of the motor in
sections 22.1 Supply voltage and 22.2 Leakage
current (AC).
This product can cause a direct current in the
protective-earth conductor.
Overvoltage and undervoltage protection
Overvoltage and undervoltage may occur in case of
unstable power supply or a faulty installation. The
motor is stopped if the voltage falls outside the
permissible voltage range. The motor restarts
automatically when the voltage is again within the
permissible voltage range. Therefore, no additional
protection relay is required.
DANGER
Electric shock
Death or serious personal injury
- Use the recommended fuse size. See
section 22. Technical data, three-phase
motors.
Motors cannot be supplied through an IT
network.
TM05 3942 1812
L1
L2
L3
L2
L1
L3
PE
RCD,
type B
TM05 3495 1512
DANGER
Electric shock
Death or serious personal injury
- Only use residual-current circuit
breakers (ELCB, GFCI, RCD) of type B.
The motor is protected against transients
from the power supply according to EN
61800-3. In areas with high lightning
intensity, we recommend external lightning
protection.

English (GB)
9
Overload protection
If the upper load limit is exceeded, the motor
automatically compensates for this by reducing the
speed and stops if the overload condition persists.
The motor remains stopped for a set period. After
this period, the motor automatically attempts to
restart. The overload protection prevents damage to
the motor. Consequently, no additional motor
protection is required.
Overtemperature protection
The electronic unit has a built-in temperature sensor
as an additional protection. When the temperature
rises above a certain level, the motor automatically
compensates for this by reducing the speed and
stops if the temperature keeps rising. The motor
remains stopped for a set period. After this period,
the motor automatically attempts to restart.
Protection against phase unbalance
Three-phase motors must be connected to a power
supply with a quality corresponding to IEC
60146-1-1, class C, to ensure correct motor
operation at phase unbalance. This also ensures
long life of the components.
7.5 Connection terminals
The descriptions and terminal overviews in this
section apply to three-phase motors.
For maximum torques, see section Torques, page
33.
7.5.1 Connection terminals
The pump has these connections:
• one analog input
• one digital input
• one signal relay output
• GENIbus connection.
• Inputs and outputs
All inputs and outputs are internally separated
from the mains-conducting parts by reinforced
insulation and galvanically separated from other
circuits. All control terminals are supplied by
protective extra-low voltage (PELV), thus
ensuring protection against electric shock.
Digital input 1 is factory-set to be start-stop
input where open circuit results in stop. A
jumper has been factory-fitted between
terminals 2 and 6. Remove the jumper if
digital input 1 is to be used as external
start-stop or any other external function.
DANGER
Electric shock
Death or serious personal injury
- Make sure that the wires to be
connected to the connection groups
below are separated from each other by
reinforced insulation in their entire
lengths.

English (GB)
10
• Signal relay output
– Signal relay 1:
LIVE:
You can connect supply voltages up to 250
VAC to the output.
PELV:
The output is galvanically separated from
other circuits. Therefore, you can connect the
supply voltage or protective extra-low voltage
to the output as desired.
• Mains supply (terminals N, PE, L or L1, L2, L3,
PE).
* If you use an external supply source, there must
be a connection to GND.
Fig. 6 Connection terminals
TM07 7284 3512
NC
C1
NO
3
15
8
26
23
B
Y
6
5
2
4
A
GND
GENIbus A
GENIbus B
+5 V
+24 V
+24 V
GND
GENIbus Y
GND
+5 V
DI1
AI1
+24 V*
++
+24 V*/5 V*
+24 V*
Terminal Type Function
NC Normally
closed contact
Signal relay 1
(LIVE or PELV)
C1 Common
NO Normally open
contact
4AI1
Analog input:
0-20 mA / 4-20 mA
0.5 - 3.5 V / 0-5 V /
0-10 V
2DI1 Digital input,
configurable
5+5 V
Supply to
potentiometer and
sensor
6 GND Ground
A GENIbus, A GENIbus, A (+)
Y GENIbus, Y GENIbus, GND
B GENIbus, B GENIbus, B (-)
3 GND Ground
15 +24 V Supply
8 +24 V Supply
26 +5 V
Supply to
potentiometer and
sensor
23 GND Ground

English (GB)
11
7.6 Signal cables
• Use screened cables with a cross-sectional area
of minimum 0.5 mm2 and maximum 1.5 mm2 for
the external on/off switch, digital input, setpoint
and sensor signals.
• Connect the screens of the cables to the frame at
both ends with good connection. The screens
must be as close as possible to the terminals.
See fig. 7.
Fig. 7 Stripped cable with screen and wire
connections
• Always tighten screws for frame connections
whether a cable is fitted or not.
• The wires in the motor terminal box must be as
short as possible.
7.7 Bus connection cable
7.7.1 New installations
For the bus connection, use a screened 3-core cable
with a cross-sectional area of minimum 0.5 mm2 and
maximum 1.5 mm2.
If the motor is connected to a unit with a cable clamp
which is identical to the one on the motor, connect
the screen to this cable clamp.
If the unit has no cable clamp leave the screen
unconnected at this end. See fig. 8.
Fig. 8 Connection with screened 3-core cable
7.7.2 Replacing a motor
• If a 2-core cable is used in the installation,
connect it as shown in fig. 9.
Fig. 9 Connection with screened 2-core cable
• If a screened 3-core cable is used in the
installation, follow the instructions in section
7.7.1 New installations.
8. Operating conditions
8.1 Maximum number of starts and stops
The number of starts and stops via the power supply
must not exceed four times per hour.
When switched on via the power supply, the pump
starts after approximately 5 seconds.
If a higher number of starts and stops is desired, use
the input for external start-stop when
starting/stopping the pump.
When started via an external on/off switch, the pump
starts immediately.
8.2 Ambient temperature
8.2.1 Ambient temperature during storage and
transportation
Minimum: -30 °C
Maximum: 60 °C.
8.2.2 Ambient temperature during operation
The motor can operate with the rated power output
(P2) at 40 °C, but continuous operation at higher
temperatures reduces the expected product life.
TM02 1325 4402 TM05 3973 1812
A
Y
B
A
Y
B
1
2
3
1
2
3
Motor
TM02 8842 0904
3 x 380-480 V
Minimum -20 °C
Maximum 40 °C
A
Y
B
A
Y
B
1
2
1
2
Motor

English (GB)
12
8.3 Installation altitude
Installation altitude is the height above sea level of
the installation site.
Motors installed up to 1000 m above sea level can
be loaded 100 %.
The motors can be installed up to 3500 m above sea
level.
Fig. 10 Motor output power in relation to altitude
In order to maintain the galvanic isolation and ensure
correct clearance according to EN 60664-1:2007,
you must adapt the supply voltage to the altitude:
Fig. 11 Supply voltage for three-phase motor in
relation to altitude
8.4 Humidity
Maximum humidity: 95 %.
If the humidity is constantly high and above 85 %,
open the drain holes in the drive-end flange. See
section 6.7 Drain holes.
8.5 Motor cooling
To ensure cooling of motor and electronics, observe
the following:
• Position the motor in such a way that adequate
cooling is ensured. See section 6.5 Ensuring
motor cooling.
• The temperature of the cooling air must not
exceed 50 °C.
• Keep cooling fins and fan blades clean.
9. User interfaces
You can make the pump settings by means of the
following user interfaces:
Operating panels
• Basic operating panel.
See section 10. Basic operating panel.
Remote controls
• Grundfos GO Remote.
See section 11. Grundfos GO Remote.
If the power supply to the pump is switched off, the
settings are stored.
Motors installed more than 1000 m above
sea level must not be fully loaded due to
the low density and consequent low
cooling effect of the air.
TM05 5243 3717TM06 9866 3617
0
60
80
90
70
100
500 1000 1500 2000 2500 3000 3500
Altitude [m]
P2 [%]
500 2500 35001500
500
480
460
440
420
380
400
Y
X
Supply voltage [V]
Altitude [m]
WARNING
Hot surface
Death or serious personal injury
- Only touch the buttons on the display as
the product may be very hot.

English (GB)
13
10. Basic operating panel
The pumps are fitted with this operating panel as
standard.
Fig. 12 Basic operating panel
11. Grundfos GO Remote
The pump is designed for wireless radio or infrared
communication with Grundfos GO Remote.
Grundfos GO Remote enables setting of functions
and gives access to status overviews, technical
product information and actual operating
parameters.
Grundfos GO Remote offers the following mobile
interfaces (MI).
Fig. 13 Grundfos GO Remote communicating
with the pump via radio or infrared
connection (IR)
11.1 Communication
When Grundfos GO Remote initiates communication
with the pump, the indicator light in the middle of
Grundfos Eye flashes green. See section
15. Grundfos Eye.
Establish communication using one of these
communication types:
• radio communication
• infrared communication.
11.1.1 Radio communication
Radio communication can take place at distances up
to 30 m. The first time Grundfos GO Remote
communicates with the pump, you must enable
communication by pressing or on the pump
operating panel. Later when communication takes
place, the pump is recognised by Grundfos GO
Remote and you can select the pump from the "List"
menu.
11.1.2 Infrared communication
When communicating via infrared light, Grundfos GO
Remote must be pointed at the pump operating
panel.
11.1.3 Startup guide
The first time Grundfos GO Remote communicates
with the pump, the startup guide starts to guide you
through the settings needed for the product to
operate in the given application. When the startup
guide has been completed, the pump is ready for
operation.
TM05 4847 2712
Pos. Symbol Description
1
Grundfos Eye
Shows the operating status of the
pump.
For further information, see
section 15. Grundfos Eye.
2
Allows radio communication with
Grundfos GO Remote and other
products of the same type.
When you try to establish radio
communication between the
pump and Grundfos GO Remote
or another pump, the green
indicator light in Grundfos Eye on
the pump flashes continuously.
Press on the pump operating
panel to allow radio
communication with Grundfos
GO Remote and other products
of the same type.
1
2
TM06 6256 0916
Pos. Description
1
Grundfos MI 301:
Separate module enabling radio or infrared
communication. You can use the module in
conjunction with an Android or iOS-based
smart device with Bluetooth connection.
+
1

English (GB)
14
11.2 Menu overview for Grundfos GO Remote
Dashboard
CMEC, CREC,
CRIEC, CRNEC,
MTREC
●
"Status"
CMEC, CREC,
CRIEC, CRNEC,
MTREC
"Resulting setpoint" ●
"Actual controlled value" ●
"Motor speed" ●
"Power consumption" ●
"Energy consumption" ●
"Operating hours" ●
"Analog input 1" ●
"Digital input 1" ●
"Fitted modules" ●

English (GB)
15
"Settings"
CMEC, CREC,
CRIEC, CRNEC,
MTREC
Section Page
"Setpoint" ● 12.1 Setpoint 16
"Operating mode" ● 12.2 Operating mode 16
"Set user-defined speed" ● 12.4 "Set user-defined speed" 16
"Control mode" ● 12.5 "Control mode" 16
"Stop function" ● 12.11 "Stop function" (Low-flow stop
function) 21
"Controller" ● "Controller" (Controller settings) 19
"Operating range" ● 12.9 Operating range 20
"Ramps" ● 12.12 Ramps 23
"Number" ● 12.14 ""Number" (Pump number) 23
"Radio communication" ● 12.15 "Radio communication"
(Enable/disable radio comm.) 23
"Analog input 1" ● 12.6 Analog inputs 17
"Digital input 1" ● 12.7 Digital inputs 18
"External setpoint funct." ● 12.10 External setpoint function 20
"Signal relay 1" ● 12.8 Signal relays (Relay outputs) 19
"Alarm handling" ● 12.13 Alarm handling 23
"Service" ● 12.14 ""Number" (Pump number) 23
"Recall settings" ● 12.17 "Recall settings" (Recall stored
settings) 23
"Undo" ● 12.17.1 "Undo" 23
"Pump name" ● 12.18 "Pump name" 23
"Connection code" ● 12.19 "Connection code" 24
"Unit configuration" ● 12.16 "Unit configuration" (Units) 23
"Alarms and warnings"
CMEC, CREC,
CRIEC, CRNEC,
MTREC
Section Page
"Alarm log" ● 12.20 Alarm log 24
"Warning log" ● 12.21 Warning log 24
"Reset alarm" button ●
"Assist"
CMEC, CREC,
CRIEC, CRNEC,
MTREC
Section Page
"Assisted pump setup" ● 12.23 Assisted pump setup 24
"Assisted fault advice" ● 12.24 Assisted fault advice 24

English (GB)
16
12. Description of functions
12.1 Setpoint
You can set the setpoint for all control modes when
you have selected the desired control mode. See
section 12.5 "Control mode".
12.2 Operating mode
Possible operating modes:
• Normal
The pump runs according to the selected control
mode.
•Stop
The pump stops.
•Min.
You can use the minimum curve mode in periods
in which a minimum flow rate is required. When
operating according to the minimum curve, the
pump is operating like an uncontrolled pump.
•Max.
You can use the maximum curve mode in periods
in which a maximum flow rate is required. When
operating according to the maximum curve, the
pump is operating like an uncontrolled pump.
• Manual
The pump is operating at a manually set speed.
In Manual the setpoint via bus is over-ruled. See
section 12.3 Set manual speed.
• "User-defined speed"
The motor is operating at a speed set by the
user. See section 12.4 "Set user-defined speed".
All operating modes are illustrated in fig. 14.
Fig. 14 Operating modes
12.3 Set manual speed
With Grundfos GO Remote, you set the speed via
the Setpoint menu.
You can set the pump speed in percentage of the
maximum speed. When you have set the operating
mode to Manual, the pump starts running at the set
speed. The speed can then be changed manually via
Grundfos GO Remote.
12.4 "Set user-defined speed"
You can set the motor speed in percentage of the
maximum speed. When you have set the operating
mode to "User-defined speed", the motor runs at the
set speed.
12.5 "Control mode"
Available control modes:
• "Constant pressure" (Const. pressure)
• "Constant temperature" (Const. temp.)
• "Constant curve" (Const. curve.)
12.5.1 "Constant pressure"
We recommend this control mode if the pump is to
deliver a constant pressure, independently of the
flow rate in the system. See fig. 15.
Fig. 15 "Constant pressure"
This control mode uses the factory-fitted pressure
sensor, if any, which measures the outlet pressure of
the pump.
For pumps without a factory-fitted sensor, you must
connect a pressure sensor to the analog input of the
pump. You can set the pressure sensor in the Assist
menu. See section 12.23 Assisted pump setup.
Fig. 16 "Constant pressure"
Controller settings
For recommended controller settings, see section
"Controller" (Controller settings).
TM06 4024 1515
Q
H
Q
H
Max.
Min.
Normal
Normal
Manual
Stop
TM05 7901 1613
Examples
• One external pressure sensor.
H
Q
p
p

English (GB)
17
12.5.2 "Constant temperature"
This control mode ensures a constant temperature.
Constant temperature is a comfort control mode that
you can use in domestic hot-water systems to control
the flow to maintain a fixed temperature in the
system. See fig. 17.
Fig. 17 "Constant temperature"
This control mode requires a temperature sensor
placed at the location where the temperature is to be
controlled. See the examples below:
Fig. 18 "Constant temperature"
Controller settings
For recommended controller settings, see section
"Controller" (Controller settings).
You can set the pump to operate according to a
constant curve, like an uncontrolled pump. See fig.
19.
The desired speed can be set in percentage of
maximum speed in the range from 13 to 100 %.
Fig. 19 "Constant curve"
Controller settings
For recommended controller settings, see section
"Controller" (Controller settings).
12.6 Analog inputs
If you want to set the analog input for a feedback
sensor, we recommend that you do this via the
Assisted pump setup menu. See section
12.23 Assisted pump setup.
If you want to set the analog input for other
purposes, you can do this manually.
If you make the manual setting via Grundfos GO
Remote, you need to enter the menu for the analog
input under the Settings menu.
Function
The analog input can be set to these functions:
•Not active
• Feedback sensor
The sensor is used for the selected control mode.
• Ext. setpoint infl.
See section 12.10 External setpoint function.
• Other function.
TM05 7900 1613
Examples
TM05 7957 1713
H
Q
t
t
t
H
Q
Function (terminal) FM 200*
(standard)
Analog input 1, setup (4) ●

English (GB)
18
Measured parameter
Select one of the parameters listed below, that is the
parameter to be measured in the system by the
sensor connected to the actual analog input. See fig.
20.
Fig. 20 Overview of sensor locations
Unit
Electrical signal
Select signal type:
• 0.5-3.5 V
•0-5 V
• 0-10 V
• 4-20 mA.
Sensor range, minimum value
Set the minimum value of the connected sensor.
Sensor range, maximum value
Set the maximum value of the connected sensor.
12.7 Digital inputs
To set the digital input, make the settings below.
Function
Select one of these functions:
•Not active.
When set to Not active, the input has no function.
• External stop.
When the input is deactivated (open circuit), the
pump stops.
• Min. (minimum speed).
When the input is activated, the pump runs at the
set minimum speed.
• Max. (maximum speed).
When the input is activated, the pump runs at the
set maximum speed.
• "User-defined speed"
When the input is activated, the motor runs at a
speed set by the user.
• External fault.
When the input is activated, a timer is started. If
the input is activated for more than 5 seconds,
the pump is stopped and a fault is indicated. This
function depends on input from external
equipment.
• Alarm resetting.
When the input is activated, a possible fault
indication is reset.
• Dry running.
When this function is selected, lack of inlet
pressure or water shortage can be detected.
When lack of inlet pressure or water shortage
(dry running) is detected, the pump is stopped.
The pump cannot restart as long as the input is
activated.
This requires the use of an accessory, such as
these:
– a pressure switch installed on the inlet side of
the pump
– a float switch installed on the inlet side of the
pump.
The priority of the selected functions in relation to
each other appears from section 14. Priority of
settings.
A stop command always has the highest priority.
TM07 7251 3620
Sensor function/measured
parameter Pos.
Discharge press. 3
Press. 1, external 6
Press. 2, external 7
Liquid temp. 13
Temperature 1 14
Temperature 2 15
Ambient temp. Not shown
Other parameter Not shown
Parameter Possible units
Pressure bar, m, kPa, psi, ft
Level m, ft, in
Pump flow m³/h, l/s, yd³/h, gpm
Liquid temperature °C, °F
Other parameter %
PT PT
PT
TT
TT
TT
36
14 2 5

English (GB)
19
12.8 Signal relays (Relay outputs)
The pump incorporates one signal relay for
potential-free signalling
Function
You can configure the signal relay to be activated by
one of the following incidents:
•Not active.
• Ready.
The pump can be running or is ready to run and
no alarms are present.
•Alarm.
There is an active alarm and the pump is
stopped.
• "Operating" (Operation).
"Operating" equals "Running" but the pump is still
in operation when the pump is stopped due to low
flow rate. See section "Low-flow detection" on
page 22.
• "Running" (Pump running).
The pump is running.
• Warning.
There is an active warning.
• "Controller" (Controller settings)
The pumps have a factory default setting of gain (Kp)
and integral time (Ti).
However, if the factory setting is not the optimum
setting, you can change the gain and the integral
time:
• Set the gain within the range from 0.1 to 20.
• Set the integral-action time within the range from
0.1 to 3600 seconds.
If you select 3600 seconds, the controller
functions as a PI controller.
Furthermore, you can set the controller to inverse
control.
This means that if you increase the setpoint, the
speed is reduced. In the case of inverse control, you
must set the gain within the range from -0.1 to -20.
Guidelines for setting of PI controller
The tables below show the recommended controller
settings:
1) In heating systems, an increase in pump
performance results in a rise in temperature at
the sensor.
2) In cooling systems, an increase in pump
performance results in a drop in temperature at
the sensor.
L2: distance in metres between heat exchanger and
sensor.
General rules of thumb
If the controller is too slow-reacting, increase the
gain.
If the controller is hunting or unstable, dampen the
system by reducing the gain or increasing the
integral time.
Constant
temperature
Kp
Ti
Heating
system1)
Cooling
system2)
0.5 -0.5 10 + 5L2
0.5 -0.5 30 + 5L2
Constant pressure KpTi
0.5 0.5
0.5 0.5
L2
t
L2
t
p
p

English (GB)
20
12.9 Operating range
Set the operating range as follows:
• Set the minimum speed within the range from
fixed minimum speed to user-set maximum
speed.
• Set the maximum speed within the range from
user-set minimum speed to fixed maximum
speed.
The range between the user-set minimum and
maximum speeds is the operating range. See fig. 21.
Fig. 21 Example of minimum and maximum
settings
12.10 External setpoint function
You can influence the setpoint by an external signal
via the analog input.
Example with constant pressure with linear
influence
Actual setpoint: actual input signal x (setpoint -
sensor min.) + sensor min.
At a sensor min. of 0 bar, a setpoint of 2 bar and an
external setpoint of 60 %, the actual setpoint is 0.60
x (2 - 0) + 0 = 1.2 bar. See fig. 22.
Fig. 22 Example of setpoint influence with
sensor feedback
Example with constant curve with linear
influence
Actual setpoint: actual input signal x (setpoint -
user-set minimum speed) + user-set minimum
speed.
At a user-set minimum speed of 25 %, and a setpoint
of 85 % and an external setpoint of 60 %, the actual
setpoint is 0.60 x (85 - 25) + 25 = 61 %. See fig. 23.
Fig. 23 Example of setpoint influence with
constant curve
12.10.1 "Setpoint influence" functions
You can select these functions:
•Not active.
When set to Not active, the setpoint is not
influenced from any external function.
• Linear function.
The setpoint is influenced linearly from 0 to 100
%. See fig. 24.
Fig. 24 Linear function
TM00 6785 5095
Before you can enable the function, you
must set the analog input to External
setpoint function.
See sections 12.6 Analog inputs and
12.7 Digital inputs.
TM06 4165 1615
Fixed maximum speed
User-set maximum speed
Operating range
User-set minimum speed
Fixed minimum speed
24 %
13 %
0 %
67 %
100 %
100
0
100 %
0
1.2
2
[bar]
0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Actual
input
signal
(60 %)
External
setpoint
signal
Setpoint
Sensor
max.
Sensor
min.
Actual
setpoint
TM06 4525 2515TM06 4166 1615
100
0
100 %
0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
25
61
85
External
setpoint
signal
Speed [%]
Fixed
maximum
speed
Actual
input
signal
(60 %)
User-set
min.
speed
Setpoint
Actual
setpoint
100
0
100 %0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Setpoint influence [%]
External
input