Grundfos CRI Series Installation And Operating Instructions Manual

CR, CRI, CRN

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

2

Table of contents

3

CR, CRI, CRN

English (GB)

Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

 (BG)

     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

eština (CZ)

Montážní a provozní návod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Deutsch (DE)

Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Dansk (DK)

Monterings- og driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Eesti (EE)

Paigaldus- ja kasutusjuhend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Español (ES)

Instrucciones de instalación y funcionamiento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Suomi (FI)

Asennus- ja käyttöohjeet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Français (FR)

Notice d'installation et de fonctionnement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

 (GR)

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Hrvatski (HR)

Montažne i pogonske upute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Magyar (HU)

Telepítési és üzemeltetési utasítás . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Italiano (IT)

Istruzioni di installazione e funzionamento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Lietuviškai (LT)

rengimo ir naudojimo instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Nederlands (NL)

Installatie- en bedieningsinstructies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Polski (PL)

Instrukcja montau i eksploatacji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Português (PT)

Instruções de instalação e funcionamento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Român (RO)

Instruciuni de instalare i utilizare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Srpski (RS)

Uputstvo za instalaciju i rad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

 (RU)

,   

  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Svenska (SE)

Monterings- och driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Slovensko (SI)

Navodila za montažo in obratovanje . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Slovenina (SK)

Návod na montáž a prevádzku . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

Türkçe (TR)

Montaj ve kullanım kılavuzu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

Table of contents

4

CR, CRI, CRN

 (UA)

     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

 (KZ)

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

 (AR)

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351

Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

Declaration of conformity EAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361

Declaration of conformity EAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362

English (GB)

5

English (GB) Installation and operating instructions

Original installation and operating instructions

CONTENTS

Page

1. Symbols used in this document

2. Handling

When lifting the entire pump with motor, follow these instructions:

• Pump with motor sizes 0.37 - 5.5 kW:

Lift the pump in the motor flange by means of straps or the

like.

• Pump with motor sizes 7.5 - 22 kW:

Lift the pump by means of the motor eyebolts.

• Pump with motor sizes 30-45 kW:

Lift the pump by means of the lifting brackets on the motor

flange.

• Pump with motor sizes 55-75 kW:

Lift the pump by means of the eyebolts on the motor side.

Fig. 1 Correct lifting of a CR pump

In case of CR, CRI and CRN pumps with other motors than MG or

Siemens, we recommend that you to lift the pump by means of

the straps in the motor flange.

1. Symbols used in this document

5

2. Handling

5

3. Type designation

6

3.1 Type key for CR, CRI, CRN 1s, 1, 3, 5, 10, 15 and 20

6

3.2 Type key for CR, CRN 32, 45, 64, 90, 120 and 150

6

4. Applications

6

5. Technical data

6

5.1 Ambient temperature and altitude

6

5.2 Liquid temperature

7

5.3 Maximum permissible operating pressure and liquid

temperature for the shaft seal

7

5.4 Minimum inlet pressure

7

5.5 Minimum inlet pressure

7

5.6 Minimum flow rate

8

5.7 Electrical data

8

5.8 Frequency of starts and stops

8

5.9 Dimensions and weights

8

5.10 Sound pressure level

8

6. Installation

8

6.1 Foundation

9

6.2 Vibration dampening

10

6.3 Outdoor installation

10

6.4 Hot or cold surfaces

10

6.5 Torques

10

6.6 Flange forces and torques

11

7. Electrical connection

12

7.1 Cable entry/screwed connection

12

7.2 Three-phase connection

12

7.3 Single-phase connection

13

7.4 Terminal box positions

13

7.5 Frequency converter operation

13

8. Startup

14

8.1 Shaft seal run-in

14

9. Maintenance

14

10. Frost protection

15

11. Service

15

11.1 Service kits and manuals

15

12. Fault finding

16

13. Disposing of the product

16

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

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.

Caution

If these safety instructions are not observed, it may

result in malfunction or damage to the equipment.

Note

Notes or instructions that make the job easier and

ensure safe operation.

TM04 0339 0608

TM04 0341 0608

TM05 9564 4113

TM04 0341 0608

0.37 - 5.5 kW 7.5 - 22 kW 30-45 kW 55-75 kW

Warning

Make sure that the pump remains in a stable position

during unpacking and installation by means of the

straps used for lifting the pump.

Note that typically the centre of gravity of the pump is

close to the motor.

English (GB)

6

3. Type designation

3.1 Type key for CR, CRI, CRN 1s, 1, 3, 5, 10, 15 and 20

3.2 Type key for CR, CRN 32, 45, 64, 90, 120 and 150

4. Applications

Grundfos multistage in-line centrifugal pumps, types CR, CRI and

CRN, are designed for a wide range of applications.

CR, CRI, CRN

CR, CRI and CRN pumps are suitable for liquid transfer,

circulation and pressure boosting of cold or hot clean liquids.

CRN

Use CRN pumps in systems where all parts in contact with the

liquid are made of high-grade stainless steel.

Pumped liquids

Thin, clean, non-flammable, non-combustible or non-explosive

liquids, not containing solid particles or fibres. The liquid must not

attack the pump materials chemically.

When pumping liquids with a density and/or viscosity higher than

that of water, use motors with correspondingly higher outputs, if

required.

5. Technical data

5.1 Ambient temperature and altitude

If the ambient temperature exceeds the above temperature

values or the pump is installed at an altitude exceeding the above

altitude values, the motor must not be fully loaded due to the risk

of overheating. Overheating may result from excessive ambient

temperatures or the low density and consequently low cooling

effect of the air.

In such cases, it may be necessary to use a motor with a higher

rated output.

Fig. 2 Motor output depends on temperature/altitude

Example

Figure 2 shows that the load of an IE3 motor at an ambient

temperature of 70 °C must not be loaded more than 89 % of the

rated output. If the pump is installed 4750 metres above sea

level, the motor must not be loaded more than 89 % of the rated

output.

In cases where both the maximum temperature and the maximum

altitude are exceeded, the derating factors must be multiplied

(0.89 x 0.89 = 0.79).

Example CR3-10X-X-X-X-XXXX

Type range: CR, CRI, CRN

Rated flow rate in m

3

/h

Number of impellers

Code for pump version

Code for pipework connection

Code for materials

Code for rubber pump parts

Code for shaft seal

Example CR 32- 2 1- X- X- X- X- XXXX

Type range: CR, CRN

Rated flow rate in m

3

/h

Number of stages

Number of impellers with reduced diameter

Code for pump version

Code for pipework connection

Code for materials

Code for rubber pump parts

Code for shaft seal

Warning

The pumping media is not suitable for the pump as it

can cause injury to persons or damage to the

equipment.

Motor

power

[kW]

Motor

make

Motor

efficiency

class

Maximum

ambient

temperature

[°C]

Maximum

altitude

above sea

level

[m]

0.37 - 0.55

Grundfos

MG

- +40 1000

0.75 - 22

Grundfos

MG

IE3 +60 3500

30-75 Siemens IE3 +55 2750

TM03 2479 4405

Pos.

Motor power

[kW]

Motor make

1

0.37 - 0.55 MG

0.37 - 22 MGE

20.75 - 22 MG

3 30-75 Siemens

Note

For motor bearing maintenance at ambient

temperatures above 40 °C, see section

9. Maintenance.

20 25 30 35 40 45 50 55 60 65 70 75 80

50

60

70

80

90

100

[%]

P2

2

1

t [°C]

1000 2250 3500 4750 m

3

English (GB)

7

5.2 Liquid temperature

The table on page 333 states the relationship between liquid

temperature range and maximum permissible operating pressure.

5.3 Maximum permissible operating pressure and

liquid temperature for the shaft seal

CR, CRI, CRN 1s to 20 and CR, CRN 32 to 150

Fig. 3 Maximum permissible operating pressure and liquid

temperature

You can clean CRI and CRN pumps in place (CIP) with a type H

shaft seal with EPDM rubber parts, HxxE and liquids up to 150 °C

for maximum 15 minutes.

CR, CRI, CRN pumps are not suitable for the pumping of liquids

above 120 °C for long periods.

5.4 Minimum inlet pressure

Fig. 4 Schematic view of open system with a CR pump

Calculate the maximum suction lift "H" in metres head as follows:

H = p

b

x 10.2 - NPSH - H

f

- H

v

- H

s

p

b

= Barometric pressure in bar.

Barometric pressure can be set to 1 bar.

In closed systems, p

b

indicates the system pressure in

bar.

NPSH = Net Positive Suction Head in metres head.

To be read from the NPSH curve on page 331 at the

highest flow the pump will be delivering.

H

f

= Friction loss in inlet pipe in metres head at the highest

flow the pump will be delivering.

H

v

= Vapour pressure in metres head, see fig. E on page

336. t

m

= liquid temperature.

H

s

= Safety margin = minimum 0.5 metres head.

If the calculated "H" is positive, the pump can operate at a suction

lift of maximum "H" metres head.

If the calculated "H" is negative, an inlet pressure of minimum "H"

metres head is required. There must be a pressure equal to the

calculated "H" during operation.

Example

p

b

= 1 bar.

Pump type: CR 15, 50 Hz.

Flow rate: 15 m

3

/h.

NPSH (from page 331): 1.1 metres head.

H

f

= 3.0 metres head.

Liquid temperature: +60 °C.

H

v

(from fig. E, page 336): 2.1 metres head.

H = p

b

x 10.2 - NPSH - H

f

- H

v

- H

s

[metres head].

H = 1 x 10.2 - 1.1 - 3.0 - 2.1 - 0.5 = 3.5 metres head.

This means that the pump can operate at a suction lift of

maximum 3.5 metres head.

Pressure calculated in bar: 3.5 x 0.0981 = 0.343 bar.

Pressure calculated in kPa: 3.5 x 9.81 = 34.3 kPa.

5.5 Minimum inlet pressure

The table on page 334 states the maximum permissible inlet

pressure. However, the actual inlet pressure + maximum pump

pressure (at no flow) must always be lower than the values stated

in fig. A, page 333.

The pumps are pressure-tested at a pressure of 1.5 times the

values stated in fig. B, page 334.

Note

The maximum permissible operating pressure and

liquid temperature ranges apply to the pump only.

Note

The diagram below applies to clean water and water

containing anti-freeze liquids.

TM03 8853 4907

Standard shaft seal

Motor

[kW]

Max. temperature range

[°C]

HQQE 0.37 - 45 -40 - 120 °C

HBQE 55-75 0-120 °C

HQQV 0.37 - 45 -20 - 90 °C

HBQV 55-75 0-90 °C

Note

The pumping of liquids above +120 °C may result in

periodical noise and reduced pump life.

-60 -40 -20 0 20 40 60 80 100 120 140

0

5

10

15

20

25

30

35

p [bar]

HQQE/V

HBQE/V

H

Q

E

H

Q

E

H

B

Q

E

H

Q

V

H

Q

E

t [°C]

TM02 0118 3800

Hv

H

NPSH

Pb

Hf

English (GB)

8

5.6 Minimum flow rate

Due to the risk of overheating, do not use the pump at flows

below the minimum flow rate.

The curves below show the minimum flow rate as a percentage of

the rated flow rate in relation to the liquid temperature.

- - - - = air-cooled top.

Fig. 5 Minimum flow rate

5.7 Electrical data

See motor nameplate.

5.8 Frequency of starts and stops

5.9 Dimensions and weights

Dimensions: See fig. C, page 335.

Weights: See label on the packing.

5.10 Sound pressure level

See fig. D, page 336.

6. Installation

The pump must be secured to a horizontal, plane and solid

foundation by bolts through the holes in the base plate. When

installing the pump, follow the procedure below in order to avoid

damaging the pump.

TM01 2816 2302

Caution

The pump must not run against a closed outlet valve.

Motor size

[kW]

Maximum number of starts per hour

≤ 2.2 250

3-4 100

5.5 - 11 50

18.5 - 22 40

30 90

37 50

45 80

55 50

75 50

Step Action

1

TM02 0013 3800

Arrows on the pump base show

the direction of flow of liquid

through the pump.

2

TM00 2256 3393

This information is stated on

page 335:

• port-to-port lengths

• dimensions of the base

• pipework connections

• diameter and position of

foundation bolts.

40 60 80 100 120 140 160 180

t [°C]

0

10

20

30

Qmin

[%]

2

1

2

1

L

B

4 x ø

B

3

TM01 1241 4097

You can install the pump

vertically or horizontally. CR,

CRN 120 and 150, 75 kW, only

vertically. However, the motor

must neither fall below the

horizontal plane nor be

installed upside down.

Make sure that an adequate

supply of cool air reaches the

motor cooling fan.

Motors above 4 kW must be

supported.

3a

TM05 7705 1013

Additional support. As the

centre of gravity on the pump is

relative high, we recommend

that pumps installed on ships,

in areas with risk of earth

quake or in systems which has

to be moved are equipped with

additional support brackets.

You can fit the bracket from the

motor stool to the bulkhead of

the ship, a rigid wall in a

building or to a rigid part.

4

TM02 0116 3800

To minimise possible noise

from the pump, we advise you

to fit expansion joints on either

side of the pump.

Carry out the foundation or

installation as described in

section 6.1 Foundation.

Fit the isolating valves on

either side of the pump to avoid

draining the system if the pump

needs to be removed for

cleaning, repair or

replacement.

Always protect the pump

against backflow by means of a

non-return valve.

5

TM02 0114 3800

Install the pipes so that air

locks do not occur, especially

on the inlet side of the pump.

6

TM02 0115 3800

Fit a vacuum valve close to the

pump if the installation has one

of these characteristics:

• The outlet pipe slopes

downwards away from the

pump.

• There is a risk of siphon

effect.

• Protection against backflow

of unclean liquids is needed.

Step Action

English (GB)

9

6.1 Foundation

Grundfos recommends that you install the pump on a concrete

foundation which is heavy enough to provide permanent and rigid

support to the entire pump. The foundation must be capable of

absorbing any vibration, normal strain or shock. The concrete

foundation must have an absolutely level and even surface.

Place the pump on the foundation, and fasten it. The base plate

must be supported on the whole area.

The following instruction applies when mounting the pump in

vertical or horizontal position.

Place the pump on the foundation, and fasten it. See fig. 6.

Fig. 6 Correct installation

Fig. 7 Foundation, vertical mounting

The recommended length and width are shown in fig. 7. Note that

the length and width of the foundation for pumps with motor size

below or equal to 30 kW must be 200 mm larger than the base

plate.

For pumps with motor size above or equal to 37 kW, the length

and width must always be 1.5 x 1.5 (L

f

x B

f

) metres.

Fig. 8 Foundation, horizontal mounting

The foundation length and width must always be 200 mm larger

than the length and width of the pump. See fig. 8.

The mass of the foundation must be at least 1.5 times the total

mass of the pump. The minimum height of the foundation (h

f

) can

then be calculated:

The density (δ) of concrete is usually taken as 2200 kg/m

3

.

In installations where noise-less operation is particularly

important, we recommend that you use a foundation with a mass

up to 5 times that of the pump.

The foundation must be provided with bolts for fixing the base

plate. See fig. 9.

Fig. 9 Bolt in foundation

When the foundation bolts are in position, place the pump on the

foundation. Then align the base plate using shims, if necessary,

so that it is completely horizontal. See fig. 10.

Fig. 10 Alignment with shims

Warning

To avoid personal injury, make sure that the pump is

mounted securely in all conditions.

Warning

Carry out the foundation or installation in accordance

with the following instructions.

TM04 0342 0608TM04 0343 0608

TM05 9579 4113

h

f

=

m

pump

× 1.5

L

f

× B

f

× δ

concrete

TM03 4589 2206TM04 0362 0608

Shims

English (GB)

10

6.2 Vibration dampening

If you use vibration dampers, install them under the foundation.

Pumps with motor size below or equal to 30 kW can use vibration

dampers as shown in fig. 11.

For pumps with motor sizes above or equal to 37 kW, use a

Sylomer

®

plate as shown in fig. 12.

Fig. 11 Pump on vibration dampers

Fig. 12 Pump on Sylomer

®

plate

6.3 Outdoor installation

When installed outdoors, we recommend that you provide the

motor with a rain cover. We also recommend that you open one of

the drain holes in the motor flange.

6.4 Hot or cold surfaces

Figure 13 shows which pump parts get as hot or cold as the

pumped liquid.

Fig. 13 Hot or cold surfaces on a CR, CRI, CRN pump

6.5 Torques

The table shows the recommended torques for bolts in base and

flanges.

The bolt quality must be minimum 8.8.

TM04 1691 1008TM04 1692 1008

Vibration dampers

Sylomer

®

plate

Warning

When pumping hot or cold liquids, make sure that

persons cannot accidentally come into contact with

hot or cold surfaces.

TM04 0361 0608

Caution

To minimize risk of damage to the equipment, make

sure to tighten bolts according to recommendations.

CR, CRI, CRN

Base

[Nm]

Flange [Nm]

DIN, JIS, ANSI Oval

1s-5 40 M10 - 50-60

10-20 50 M12 60 60-70

32-150 70 M16 100 70-80

M20 150 -

M24 200 -

Pump head

Pump sleeve

Base

English (GB)

11

6.6 Flange forces and torques

If not all loads reach the maximum permissible value stated in the

tables below, one of these values may exceed the normal limit.

Contact Grundfos for further information.

Fig. 14 Flange forces and torques

Forces

The following tables represent values that applies according to

the material quality.

TM04 0346 2013

Y-direction: Inlet/outlet

Z-direction: Direction of chamber stack

X-direction: 90 ° from inlet/outlet

Force limits for CR cast-iron pump housing

Flange, DN

[mm]

CR

Force, Y-direction

[N]

Force, Z-direction

[N]

Force, X-direction

[N]

25/32 1s-5 338 394 319

40 10 413 469 375

50 15 and 20 563 581 506

65 32 694 788 638

80 45 938 769 844

100 64 and 90 1256 1013 1125

125/150 120 and 150 1256 1013 1125

Torque limits to CR cast-iron pump housing

Flange, DN

[mm]

CR

Torque, Y-direction

[Nm]

Torque, Z-direction

[Nm]

Torque, X-direction

[Nm]

25/32 1s-5 300 175 125

40 10 400 275 200

50 15 and 20 450 325 250

65 32 500 350 300

80 45 325 400 550

100 64 and 90 375 475 625

125/150 120 and 150 375 475 625

Force limits for CRI, CRN stainless-steel pumps housing

Flange, DN

[mm]

CRI, CRN

Force, Y-direction

[N]

Force, Z-direction

[N]

Force, X-direction

[N]

25/32 1s-5 675 788 638

40 10 825 938 750

50 15 and 20 1125 1163 1013

65 32 1388 1575 1275

80 45 1875 1538 1688

100 64 and 90 2513 2025 2250

125/150 120 and 150 2513 2025 2250

Torque limits to CRI, CRN stainless steel pump housing

Flange, DN

[mm]

CRI, CRN

Torque, Y-direction

[Nm]

Torque, Z-direction

[Nm]

Torque, X-direction

[Nm]

25/32 1s-5 600 350 250

40 10 800 550 400

50 15 and 20 900 650 500

65 32 1000 700 600

80 45 650 800 1100

100 64 and 90 750 950 1250

125/150 120 and 150 750 950 1250

English (GB)

12

7. Electrical connection

The electrical connection must be carried out by an authorised

electrician in accordance with local regulations.

The operating voltage and frequency are marked on the motor

nameplate. Make sure that the motor is suitable for the power

supply on which it will be used and the motor terminal connection

is correct. You will find a wiring diagram in the terminal box.

7.1 Cable entry/screwed connection

All motors are supplied without screwed cable entries. The table

below shows the numbers and sizes of cable entry holes of the

terminal box (standard EN 50262).

7.2 Three-phase connection

1)

60 Hz motors, 0.37 - 1.1 kW: 220-277/380-440 V.

Fig. 15 Delta connection

Fig. 16 Star connection

If the motor is provided with PTC sensors or PTO contacts, the

connection must be in accordance with the wiring diagram in the

terminal box.

Connect three-phase motors to a motor-protective circuit breaker.

Warning

Connect the CR pump to an external mains switch

placed close to the pump and to a motor-protective

circuit breaker or a CUE frequency converter. Make

sure you can lock the mains switch in OFF position

(isolated). Type and requirements as specified in EN

60204-1, 5.3.2.

Warning

Before removing the terminal box cover and before

removing or dismantling the pump, make sure that

the power supply has been switched off and that it

cannot be accidentally switched on.

Caution

Consider whether it is necessary to install an

emergency stop switch.

Motor

[kW]

Number and size

of cable entries

Description

0.25 - 0.55 2 x M20 x 1.5

The holes have precast

threads and are closed with

knock-out cable entries

0.75 - 3.0 2 x M20

The holes are closed with

knock-out cable entries

4.0 - 7.5 4 x M25

The holes are closed with

knock-out cable entries

11-22

2 x M20

4 x M40

The holes are closed with

knock-out cable entries

30-45 2 x M50 x 1.5 Blanking plug

55-75 2 x M63 x 1.5 Blanking plug

Mains supply [V]

Delta connection Star connection

50 Hz

220-240 / 380-415

380-415 / 660-690

60 Hz

220-277 / 380-480

1)

380-480 / 660-690

TM02 6656 1305TM02 6655 1305

W2 U2 V2

U1 V1 W1

U1

U2

V1

V2

W1

W2

L

3

L

2

L

1

W2

U2

V2

U1

V1

W1

U2

V2

W1

W2

L

3

L

2

L

1

English (GB)

13

7.3 Single-phase connection

Fig. 17 Connection, "low voltage", 0.37 - 0.75 kW

Fig. 18 Connection, "high voltage", 0.37 - 0.75 kW

Fig. 19 Connection, "low voltage", 1.1 - 2.2 kW

Fig. 20 Connection, "high voltage", 1.1 - 2.2 kW

Single-phase Grundfos motors incorporate a thermal switch and

require no additional motor protection.

7.4 Terminal box positions

You can turn the terminal box to four positions, in 90 ° steps.

Follow this procedure:

1. If necessary, remove the coupling guards. Do not remove the

coupling.

2. Remove the bolts securing the motor to the pump.

3. Turn the motor to the required position.

4. Replace and tighten the bolts.

5. Replace the coupling guards.

Carry out the electrical connection as shown in the diagram

inside the terminal box cover.

7.5 Frequency converter operation

You can use 3-phase motors for frequency convertor operation

following the conditions below. This section applies to motors

defined in IEC 60034.

7.5.1 General conditions

Protect all motors used with frequency converters against voltage

peaks and dU/dt according to IEC 60034-17. Grundfos

recommends that you use insulated bearings for motors from

frame size 225 (45 kW/2-pole, 30 kW/4-pole and 22 kW/6-pole).

Mains voltage dependent conditions

200-240 V

No output filters are required for frequency converter operated

motors with mains voltages up to 240 V.

380-500 V

For frequency converter operated motors with motor cable length

less than 25 metres and mains supply up to 460 V. No additional

motor protection against voltage peaks is required. For frequency

converter operated motors with motor cable length of more than

25 metres or mains supply higher than 460 V, sine-wave filters

are required.

500 V and higher

Always use sine-wave filters for motors marked with 500 V or

higher voltages. *

Exception

• Protect Grundfos motors types MG 71 and MG 80 (up to 1.1

kW/2-pole and up to 0.75 kW/4-pole) for supply voltages up to

and including 440 V without phase insulation against voltage

peaks above 650 V between the supply terminals.

• If you use MG 71 and MG 80 without phase insulation for input

voltages above 240 V, it requires that you use sine save filters

at the output of the frequency converter.

• MG 71 and MG 80 with phase insulation for use with variable

frequency drives are available as standard products.

* Motors with reinforced insulation can be supplied as an option.

These motors are according to IEC 60034-25 and therefore there

is no need for sine-wave filters. This do not eliminate the

requirement for insulated bearings from frame size 225.

7.5.2 Motors supplied by Grundfos

You can connect all three-phase MG motors with phase insulation

to a frequency converter.

Mains supply [V]

"Low voltage" "High voltage"

50 Hz 220-230 / 240

TM04 1693 1008TM04 1694 1008TM04 0345 0608TM04 0344 0608

English (GB)

14

7.5.3 Phase insulation, MG 71 and 80

MG motors, frame sizes 71 and 80, do not have phase insulation

as standard. The motors are not suitable for frequency converter

operation as they are not protected against the voltage peaks

caused by the frequency converter operation. Only motors with a

rated voltage equal to or above 460 V have phase insulation.

We recommend that you protect all other motors against voltage

peaks higher than 1200 V by 2000 V/μsec.

You can eliminate the above disturbances, i.e. both increased

acoustic noise and detrimental voltage peaks by fitting an LC filter

between the frequency converter and the motor.

For further information, contact the frequency converter or motor

supplier.

7.5.4 Other motor makes than those supplied by Grundfos

Contact Grundfos or the motor manufacturer.

8. Startup

Fig. 21 Vent valve, standard and an optional solution with

hose connection

Follow the instructions on page 351.

CR, CRI, CRN 1s to 5

For these pumps, we advise you to open the bypass valve during

startup. See fig. 22 for bypass valve location. The bypass valve

connects the inlet and outlet sides of the pump, thus making the

filling procedure easier. Close the bypass valve again when the

operation is stable.

When pumping liquids containing air, we advise you to leave the

bypass valve open if the operating pressure is lower than 6 bar.

Close the bypass valve if the operating pressure constantly

exceeds 6 bar. Otherwise the material at the opening will be worn

because of the high liquid velocity.

8.1 Shaft seal run-in

The seal faces are lubricated by the pumped liquid, meaning that

there may be a certain amount of leakage from the shaft seal.

When you start the pump for the first time, or when you install a

new shaft seal, a certain run-in period is required before the

leakage is reduced to an acceptable level. The time required for

this depends on the operating conditions, i.e. every time the

operating conditions change, a new run-in period will be started.

Under normal conditions, the leaking liquid will evaporate. As a

result, no leakage will be detected.

9. Maintenance

Pump bearings and shaft seal are maintenance-free.

Motor bearings

Motors not fitted with grease nipples are maintenance-free.

Motors fitted with grease nipples must be lubricated with a high-

temperature, lithium-based grease. See the instructions on the

fan cover.

In the case of seasonal operation where the motor is idle for more

than 6 months of the year, we recommend that you grease the

motor when you take the pump out of operation.

Depending on the ambient temperature, replace or lubricate the

motor bearings according to the table below. The table applies to

2-pole motors. The number of operating hours stated for bearing

replacement are guidelines only.

Intervals for 4-pole motors are twice as long as those for 2-pole

motors.

If the ambient temperature is lower than 40 °C, then replace or

lubricate the bearings at the intervals mentioned under 40 °C.

Caution

Frequency converter operation of MG motors without

phase insulation will cause damage to the motor.

Caution

Do not start the pump until it has been filled with

liquid and vented. If the pump runs dry, the pump

bearings and the shaft seal may be damaged.

TM05 1160 0611 - TM05 8098 1913

Warning

Pay attention to the direction of the vent hole and

make sure that the escaping water does not cause

injury to persons or damage to the motor or other

components.

In hot-water installations, pay special attention to the

risk of injury caused by scalding hot water.

Warning

Make sure that a leakage does not cause injury to

persons or damage to the equipment.

Warning

Before starting work on the pump, make sure that all

power supplies to the pump have been switched off

and that they cannot be accidentally switched on.

Motor size

[kW]

Bearing replacement interval [operating hours]

40 °C 45 °C 50 °C 55 °C 60 °C

0.37 - 0.75 18000----

1.1 - 7.5 20000 15500 12500 10000 7500

Motor size

[kW]

Lubrication interval [operating hours]

40 °C 45 °C 50 °C 55 °C 60 °C

11 - 18.5 4500 3400 2500 1700 1100

22 4000 3100 2300 1500 1000

30-55 4000 3000 2000 1500 -

75 2000 1500 1000 500 -

English (GB)

15

10. Frost protection

Drain pumps which are not being used during periods of frost to

avoid damage.

Drain the pump by loosening the vent screw in the pump head

and by removing the drain plug from the base.

Do not tighten the vent screw and replace the drain plug until the

pump is to be used again.

CR, CRI, CRN 1s to 5

Before replacing the drain plug in the base, screw the bypass

valve out against the stop. See fig. 22.

Fig. 22 Location of drain plug and bypass valve

Fit the drain plug by tightening the large union nut followed by the

bypass valve.

11. Service

We recommend that you repair pumps with motors of 7.5 kW and

up at pump site. Necessary lifting equipment must be available.

If Grundfos is requested to service the pump, contact Grundfos

with details about the pumped liquid, etc. before the pump is

returned for service. Otherwise, Grundfos can refuse to accept

the pump for service.

Possible costs of returning the pump are to be paid by the

customer.

However, any application for service, no matter to whom it may

be made), must include details about the pumped liquid if you

have used the pump for liquids which are toxic or injurious to

health.

11.1 Service kits and manuals

Service documentation is available in Grundfos Product Center

(http://product-selection.grundfos.com/).

If you have any questions, please contact the nearest Grundfos

company or service workshop.

Warning

Pay attention to the direction of the vent hole and

make sure that the escaping water does not cause

injury to persons or damage to the motor or other

components.

In hot-water installations, pay special attention to the

risk of injury caused by scalding hot water.

TM01 1243 4097

Drain plug

Bypass valve

Note

If you have used a pump for a liquid which is toxic or

injurious to health, the pump will be classified as

contaminated.

English (GB)

16

12. Fault finding

13. Disposing of the product

This product or parts of it must be disposed of in an

environmentally sound way:

1. Use the public or private waste collection service.

2. If this is not possible, contact the nearest Grundfos company

or service workshop.

Subject to alterations.

Warning

Before removing the terminal box cover and before

removing or dismantling the pump, make sure that

the power supply has been switched off and that it

cannot be accidentally switched on.

Fault Cause Remedy

1. Motor does not run

when started.

a) Supply failure. Connect the power supply.

b) The fuses are blown. Replace fuses.

c) The motor-protective circuit breaker has tripped. Reactivate the motor-protective circuit breaker.

d) The thermal protection has tripped. Reactivate the thermal protection.

e) The main contacts in the motor-protective circuit

breaker are not making contact or the coil is

faulty.

Replace contacts or magnetic coil.

f) The control circuit is defective. Repair the control circuit.

g) The motor is defective. Replace the motor.

2. Motor-protective circuit

breaker trips

immediately when

power supply is

switched on.

a) One fuse is blown or the automatic circuit

breaker is tripped.

Replace the fuse or cut in the circuit breaker.

b) The contacts in the motor-protective circuit

breaker are faulty.

Replace motor-protective circuit breaker contacts.

c) The cable connection is loose or faulty. Fasten or replace the cable connection.

d) The motor winding is defective. Replace the motor.

e) The pump is mechanically blocked. Remove the mechanical blocking of the pump.

f) The motor-protective circuit breaker setting is

too low.

Set the motor-protective circuit breaker correctly.

3. Motor-protective circuit

breaker trips

occasionally.

a) The motor-protective circuit breaker setting is

too low.

Set the motor-protective circuit breaker correctly.

b) Low voltage at peak times. Check the power supply.

4. Motor-protective circuit

breaker has not tripped

but the pump does not

run.

a) Check 1 a), b), d), e) and f).

5. Pump performance not

constant.

a) The pump inlet pressure is too low (cavitation). Check the inlet conditions.

b) The inlet pipe or pump is partly blocked by

impurities.

Clean the inlet pipe or pump.

c) The pump draws in air. Check the inlet conditions.

6. Pump runs but gives no

water.

a) The inlet pipe or pump is blocked by impurities. Clean the inlet pipe or pump.

b) The foot or non-return valve is blocked in closed

position.

Repair the foot or non-return valve.

c) There is a leakage in the inlet pipe. Repair the inlet pipe.

d) There is air in the inlet pipe or pump. Check the inlet conditions.

e) The motor runs in the wrong direction of

rotation.

Change the direction of rotation of the motor.

7. Pump runs backwards

when switched off.

a) There is a leakage in the inlet pipe. Repair the inlet pipe.

b) The foot or non-return valve is defective. Repair the foot or non-return valve.

8. Leakage in shaft seal. a) The shaft seal is defective. Replace the shaft seal.

9. Noise. a) Cavitation. Check the inlet conditions.

b) The pump does not rotate freely due to frictional

resistance, as a result of incorrect pump shaft

position.

Adjust the pump shaft.

Follow the procedure in fig. F, G or H at the end of

these instructions.

c) Frequency converter operation. See section 7.5 Frequency converter operation.

 (BG)

17

 (BG)     

    



.

1.    

2. 

     , 

 - :

•      0,37 - 5,5 kW:

     ,  

  .

•      7,5 - 22 kW:

 ,     

 .

•      30-45 kW:

 , 

   

   .

•      55-75 kW:

 ,     

  .

. 1     CR

    CR, CRI  CRN   ,  

 MG  Siemens,      

   

  .

1.    

17

2. 

17

3.   

18

3.1     CR, CRI, CRN 1s, 1, 3, 5, 10, 15  20

18

3.2     CR, CRN 32, 45, 64, 90, 120  150

18

4. 

18

5.  

18

5.1     

18

5.2   

19

5.3     

      

19

5.4

  

19

5.5   

19

5.6  

20

5.7  

20

5.8     

20

5.9   

20

5.10    

20

6. 

20

6.1 

21

6.2   

22

6.3   

22

6.4    

22

6.5  

22

6.6      

23

7.  

24

7.1   /  

24

7.2  

24

7.3  

25

7.4    

25

7.5    

25

8. 

26

8.1     

26

9. 

26

10.   

27

11. 

27

11.1    

27

12.   

28

13.   

28



 ,    

 . 

     

     

.



       ,

     .



      

  ,    

   .



      

      

.

Внимание

     

       

.

Указание

  ,   

   .

TM04 0339 0608

TM04 0341 0608

TM05 9564 4113

TM04 0341 0608

0,37 - 5,5 kW 7,5 - 22 kW 30-45 kW 55-75 kW



       

      

  ,   

 .

 ,    

      .

 (BG)

18

3.   

3.1     CR, CRI, CRN 1s, 1, 3, 5, 10, 15  20

3.2     CR, CRN 32, 45, 64, 90, 120  150

4. 

     Grundfos

 CR, CRI, CRN      

.

CR, CRI, CRN

 CR, CRI  CRN      ,

       

.

CRN

 CRN   ,   

       

  .

 

, ,   

,     .

       

   .

     / , -

    ,    

- ,   .

5.  

5.1     

     -

      ,

  -,    

      .

        

     

      

 

.

        

  -  .

. 2      /

  



 2 ,     IE3 

  70 °C     89 % 

  .    



4750   ,   

    89 %   

.

 ,       

    ,

      (0,89 x 0,89

= 0,79).

 CR 3- 10 X- X- X- X- XXXX

  : CR, CRI,

CRN

   m

3

/h

   

    

    

  

     

    

 CR 32- 2 1- X- X- X- X- XXXX

  : CR,

CRN

   m

3

/h

 

     



    

    

  

     

    



      ,

      

    .

 



[kW]





 



 







[°C]







[m]

0,37 - 0,55

Grundfos

MG

- +40 1000

0,75 - 22

Grundfos

MG

IE3 +60 3500

30-75 Siemens IE3 +55 2750

TM03 2479 4405

.

 



[kW]

 

1

0,37 - 0,55 MG

0,37 - 22 MGE

20,75 - 22 MG

3 30-75 Siemens

Указание

     

    40 °C  

9. Поддръжка.

20 25 30 35 40 45 50 55 60 65 70 75 80

50

60

70

80

90

100

[%]

P2

2

1

t [°C]

1000 2250 3500 4750 m

3

 (BG)

19

5.2   

  . 333     

     

 .

5.3     

     



CR, CRI, CRN 1s  20  CR, CRN 32  150

. 3     

  

     (CIP)  CRI  CRN 

     H  EPDM  , HxxE, 

    150 °C   15 .

 CR, CRI, CRN      

    120 °C    

.

5.4   

. 4      CR 

    ""  

   :

H=p

b

x 10,2 - NPSH - H

f

- H

v

- H

s

p

b

=    bar.

      

 1 bar.

   p

b

 

  bar.

NPSH =     (NPSH) 

  .

   NPSH   . 331  -

    .

H

f

=        

  - ,   .

H

v

=      ,  . E,

. 336. t

m

=   .

H

s

=  =  0,5  .

    ""  , 

     ,   

""  .

    "H"  ,  

   "H"  .   

   ,   

  "H".



p

b

= 1 bar.

  : CR 15, 50 Hz.

: 15 m

3

/h.

NPSH ( . 331): 1,1  .

H

f

= 3,0   .

  : +60 °C.

H

v

( . E, . 336): 2,1  .

H = p

b

x 10,2 - NPSH - H

f

- H

v

- H

s

[ ].

H = 1 x 10,2 - 1,1 - 3,0 - 2,1 - 0,5 = 3,5  .

 ,       

  3,5  .

   bar: 3,5 x 0,0981 = 0,343 bar.

   kPa: 3,5 x 9,81 = 34,3 kPa.

5.5   

  . 334   

 .     +

    ( )  

  -     . A, . 333.

     1,5  - 

,   . B, . 334.

Указание

    

     

   .

Указание

        

 .

TM03 8853 4907



 





[kW]

.  

 [°C]

HQQE 0,37 - 45 -40 - 120 °C

HBQE 55-75 0-120 °C

HQQV 0,37 - 45 -20 - 90 °C

HBQV 55-75 0-90 °C

Указание

     +120 °C

      

   .

-60 -40 -20 0 20 40 60 80 100 120 140

0

5

10

15

20

25

30

35

p [bar]

HQQE/V

HBQE/V

H

Q

E

H

Q

E

H

B

Q

E

H

Q

V

H

Q

E

t [°C]

TM02 0118 3800

Hv

H

NPSH

Pb

Hf

 (BG)

20

5.6  

   ,    

    .

 -      

      

 .

- - - - =    .

. 5  

5.7  

.     .

5.8     

5.9   

:. . , . 335.

:   .

5.10    

. . D, . 336.

6. 

      ,

       

  .      

,     .

TM01 2816 2302

Внимание

      

   .

 



[kW]

    

≤ 2,2 250

3-4 100

5,5 - 11 50

18,5 - 22 40

30 90

37 50

45 80

55 50

75 50

 

1

TM02 0013 3800

   

   

   

.

2

TM00 2256 3393

    

. 335:

•    

 

•   

•   

•   

  

.

40 60 80 100 120 140 160 180

t [°C]

0

10

20

30

Qmin

[%]

2

1

2

1

L

B

4 x ø

B

3

TM01 1241 4097

   

  .

CR, CRN 120  150, 75 kW -

 . 

     

   

     

  .

 ,   

  

  

  .

    4 kW

 

  

.

3a

TM05 7705 1013

 .  

   

   ,

  ,

  , 

   

 ,  

  

 .  

   

   

  , 

    



 .

4

TM02 0116 3800

  

   

   

  

   .

  

 

  

6.1 Фундамент.

 

    

,     

  ,

    

 

,

  .

  

  , 

  .

5

TM02 0114 3800

  , 

    

 ,

  

  .

6

TM02 0115 3800

   

  , 

  

  :

•    

  

.

•    

.

•    

   

 .

 

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Grundfos CRI Series Installation And Operating Instructions Manual

Grundfos CRI Series Installation And Operating Instructions Manual

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