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