Grundfos CREC User manual

CREC, CRIEC, CRNEC, MTREC, CMEC

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

Table of contents

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)

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)

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)

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. 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.

English (GB)

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)

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

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)

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)

• 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

GND

GENIbus A

GENIbus B

+5 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

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