Grundfos CRK Series Manual de usuario

CRK, MTR

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions

These installation and operating instructions

describe Grundfos CRK and MTR pumps.

Sections 1-4 give the information necessary to be

able to unpack, install and start up the product in a

safe way.

Sections 5-11 give important information about the

product, as well as information on service, fault

finding and disposal of the product.

CONTENTS

Page

1. General information

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. General information 2

1.1 Hazard statements 2

1.2 Notes 3

2. Receiving the product 3

2.1 Lifting the product 3

3. Installing the product 4

3.1 Mechanical installation 4

3.2 Pump location 4

3.3 Electrical connection 5

4. Starting up the product 6

4.1 Before starting the product 6

4.2 Starting the product 6

5. Product introduction 7

5.1 Applications 7

5.2 Pumped liquids 7

5.3 Identification 7

6. Technical data 9

6.1 Ambient temperature 9

6.2 Maximum permissible operating pressure

and liquid temperature for the shaft seal 9

6.3 Minimum flow rate 10

6.4 Electrical data 10

6.5 Maximum number of starts 10

7. Sound pressure level 10

8. Servicing the product 11

8.1 Maintaining the product 11

8.2 Filters 12

8.3 Periodic checks 12

8.4 Coupling adjustment 12

8.5 Contaminated products 12

8.6 Service documentation 12

9. Taking the product out of operation 12

9.1 Taking the product permanently out of

operation 12

10. Fault finding the product 13

11. Disposing of the product 14

Read this document before installing the

product. Installation and operation must

comply with local regulations and accepted

codes of good practice.

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.

English (GB)

1.2 Notes

The symbols and notes below may appear in

Grundfos installation and operating instructions,

safety instructions and service instructions.

2. Receiving the product

2.1 Lifting the product

When lifting the entire product 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.

Fig. 1 Lifting points

In case of pumps with other motors than MG or

Siemens, we recommend that you lift the pump by

means of the straps in the motor flange.

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.

0.37 - 5.5 kW 7.5 - 22 kW

TM04 0339 0608

TM04 0341 0608

30-45 kW 55-75 kW

TM05 9564 4113

English (GB)

3. Installing the product

3.1 Mechanical installation

3.2 Pump location

The pump is designed for tank mounting in vertical

and horizontal position. However, only MTR version

H and MTRE version H are suitable for horizontal

mounting.

The pump is positioned in a hole cut into the tank

and is secured to the tank by four hexagon head

screws through the holes in the mounting flange.

Fig. 2 Vertical and horizontal installation

On horizontally installed MTR, MTRE pumps with

motors from 5.5 kW and up the motors have feet and

must be supported.

Fig. 3 Horizontally installed MTR with foot

Fig. 4 Vertical installation

Mounting flange dimensions:

WARNING

Moving parts

Death or serious personal injury

- Tighten the coupling screws to the

correct torque.

- Install the coupling guards securely to

the pump with the screws intended for

this purpose.

CAUTION

Hot surface

Minor or moderate personal injury

- The pump must be installed so that

persons cannot accidentally come into

contact with the hot surface of the

motor.

TM01 4990 1399TM04 5755 3809

For horizontally mounted pumps ensure a

sufficient sealing between pump flange

and tank. A sealing gasket will usually

suffice.

Before changing shaft seals for

horizontally mounted pumps, drain the

tank.

Vertical Horizontal

MTR 32, 45 and 64 pumps can only be

installed in vertical position.

TM02 8042 4503

Pump type D1 D2 D3 L C X

CRK 2, 4 140 160 180 100 Rp 1 1/4

G 1 1/4 ∅7.5

MTR 1s, 1,

3, 5, 8 140 160 180 100 Rp 1 1/4

G 1 1/4 ∅9.5

MTR 10,

15, 20 200 225 250 125 Rp 2

G 2 ∅9

MTR 32 190 220 250 150 DN 65 ∅12

MTR 45,

64 240 265 290 165 DN 80 ∅12

4 x X

English (GB)

3.2.1 Inlet conditions

The bottom of the pump strainer must be at least 25

mm above the bottom of the tank.

The pumps are designed to provide full performance

down to a level of A mm above the bottom of the

strainer.

At a liquid level between A and B mm above the

bottom of the strainer, the built-in priming screw will

protect the pump against dry running.

MTR 32, 45 and 64 pumps have no priming screw.

Fig. 5 CRK 2, 4 and MTR 1s, 1, 3, 5, 8

Fig. 6 MTR 10, 15, 20

Fig. 7 MTR 32, 45, 64

3.3 Electrical connection

The electrical connection must be carried out by an

authorized electrician in accordance with local

regulations.

The electrical connection must be carried out as

shown in the wiring diagram inside the terminal box

cover.

The operating voltage and frequency are marked on

the pump nameplate. Please make sure that the

motor is suitable for the power supply on which it will

be used.

Single-phase Grundfos motors incorporate a thermal

switch and require no additional motor protection.

Pump type A [mm] B [mm]

CRK 2, 4 and MTR 1s, 1, 3, 5 41 28

MTR 10, 15, 20 50 25

MTR 32, 45, 64 70 -

TM07 2800 4118TM05 7224 0813

25 mm

TM05 7225 0813

WARNING

Electric shock

Death or serious personal injury

- Before starting any work on the product,

make sure that the power supply has

been switched off and that it cannot be

accidentally switched on.

- Connect the pump to an external main

switch close to the pump and to a

motor-protective circuit breaker or a

CUE frequency converter. Make sure

that you can lock the main switch in

OFF position (isolated). Type and

requirements as specified in EN 60204-

1, 5.3.2.

25 mm

English (GB)

Three-phase motors must be connected to a motor-

protective circuit breaker.

The terminal box can be turned to four positions, in

90 ° steps. See fig. 8.

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.

Fig. 8 Terminal box positions

3.3.1 Frequency converter operation

Motors supplied by Grundfos

All three-phase motors supplied by Grundfos can be

connected to a frequency converter.

Depending on the frequency converter type, this may

cause increased acoustic noise from the motor.

Furthermore, it may cause the motor to be exposed

to detrimental voltage peaks.

We recommend to protect all other motors against

voltage peaks higher than 850 V.

The above disturbances, i.e. both increased acoustic

noise and detrimental voltage peaks, can be

eliminated by fitting an LC filter between the

frequency converter and the motor.

For further information, please contact the frequency

converter or motor supplier.

Other motor makes

If other motors makes than those supplied by

Grundfos are used, contact Grundfos or the motor

manufacturer.

4. Starting up the product

4.1 Before starting the product

• Make sure that all pipe connections are tight.

• Make sure that the pump is partly filled with liquid

(partly submerged).

• Make sure that the strainer is not blocked by

impurities.

4.2 Starting the product

1. Close the isolating valve on the outlet side of the

pump.

2. If the pump is fitted with an vent valve, this valve

must be opened. See fig. 9.

Fig. 9 Position of the vent valve

3. See the correct direction of rotation of the pump

on the motor fan cover or on the coupling guard.

When seen from the top, the pump must rotate

counterclockwise.

4. Start the pump and check the direction of

rotation.

5. Open the outlet pipe isolating valve a little.

6. If the pump is fitted with an vent valve, this valve

must be closed when a steady flow of liquid runs

out of it.

7. Completely open the outlet pipe isolating valve.

The pump has now been vented and is ready for

operation.

TM00 4257 3296

Grundfos motors, types MG 71 and MG 80

as well as MG 90 (1.5 kW, 2-pole), for

supply voltages up to and including 440 V

(see motor nameplate), must be protected

against voltage peaks higher than 650 V

(peak value) between the supply terminals.

0˚

90˚

180˚

270˚

WARNING

Too high pressure and leakage

Death or serious personal injury

- Do not run the pump against a closed

outlet valve for more than approx. 5

minutes.

TM01 6428 2399

Vent valve

English (GB)

5. Product introduction

5.1 Applications

The Grundfos pumps, types CRK and MTR, are tank

mounted multistage centrifugal pumps designed for

the following applications:

• liquid transfer in machine tools

• condensate transfer

• liquid transfer in industrial washing machines

• pressure boosting of cold or hot clean liquids

• similar applications.

5.2 Pumped liquids

Thin, non-explosive liquids, not containing 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.

MTR version A pumps have a cast iron pump head.

In MTR version I and CRK version I pumps all parts

in contact with the pumped liquid are of stainless

steel EN/DIN 1.4301 or better.

5.3 Identification

5.3.1 Nameplate for CRK and MTR

Fig. 1 Example of nameplate

5.3.2 Type key for CRK

*See fig. 2.

Fig. 2 Number of chambers / impellers

TM05 5279 3912

Pos. Description

1 Type designation

2 Model

3 Product number

4 Place of production

5 Production year and week (YYWW)

6 P2, 50 Hz

7 Head against closed valve

8 Head at rated flow rate

Direction of rotation

CCW: Counterclockwise

CW: Clockwise

Type MTR10-6/3 A-W-A-HUUV

Model A 96889995 P1 1019

f 50 Hz 1.1P2 kW

30.3 mmin H

max

2853n

Q10 m /h H 22.7 m

CCWbar/ C25/90

Made in Hungary

max

Serial No. 0001

MEI 0.70 p

-1

DK-8850 Bjerringbro, Denmark

--.-

12 3 4 5

19 20

10 Country of production

11 Approval marks

12 Frequency

13 Speed

14 Rated flow rate

15 Maximum pressure and temperature

The number of the copy of the technical

file kept at KEMA (stated if the pump is

ATEX classified)

17 The serial number of the pump (stated if

the pump is ATEX classified)

18 ATEX category (stated if the pump is

ATEX classified)

19 Minimum efficiency index

20 Hydraulic pump efficiency

Example CRK E 4 - 160 / 2 -x -x -x -xxxx

Pump type

Pump with integrated

frequency control

Rated flow rate [m3/h]

Number of chambers*x 10

Number of impellers*

Code for pump version

Code for pipe connection

Code for materials

Code for shaft seal and rubber pump parts

TM01 4991 1299

Pos. Description

Number of

impellers

Number of

chambers

English (GB)

5.3.3 Type key for MTR, MTRE

Example MTR E 32 (s) -2 /1 -1 -A -F -A -H UU V

Pump type

Pump with integrated frequency control

Rated flow rate [m3/h]

All impellers with reduced diameter (applies only to MTR 1s)

Number of chambers, see fig. 2

Number of impellers, see fig. 2

Number of impellers with reduced diameter

Pump version

ABasicversion

B Oversize motor

C Inlet pipe

E Pump with certificate/approval

F 120 °C version

H Horizontal version

J Pump with different max. speed

P Undersize motor

T Double oversize

X Special version

Pipe connection

F DIN flange

G ANSI flange

J JIS flange

M Square flange with internal thread

W Internal thread

WB NPT internal thread

X Special version

Materials

ABasicversion

I Wetted parts EN/DIN 1.4301 / AISI 304

X Special version

Shaft seal

H Balanced cartridge seal

Q Silicon carbide

U Tungsten carbide

B Carbon

E EPDM

FFXM

KFFKM

VFKM

English (GB)

6. Technical data

* Applies to pump version F.

6.1 Ambient temperature

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. 3 Relationship between motor output (P2)

and ambient temperature/altitude

Example: A pump with a 1.1 kW IE2 MG motor: If

this pump is installed 4750 m above sea level, the

motor must not be loaded more than 88 % of rated

output. At an ambient temperature of 75 °C, the

motor must not be loaded more that 78 % of rated

output. If the pump is installed 4750 m above sea

level at an ambient temperature of 75 °C, the motor

must not be loaded more than 88 % ×78 % = 68.6 %

of rated output.

6.2 Maximum permissible operating

pressure and liquid temperature for the

shaft seal

Fig. 4 MTR 1s to 64

Pump type CRK MTR

Minimum liquid temperature [°C] -10 -10

Maximum liquid temperature [°C] +90 +90

(120*)

Maximum operating pressure [bar] 25 25

Enclosure class IP55 IP55

Motor power

[kW]

Motor make

Motor efficiency class

Max. ambient temperature

at full load [°C]

Max. altitude above sea

level [m]

Pos. in output curve in fig.

0.06 - 0.18 Siemens - +40 1000 1

0.25 - 0.55 MG - +40 1000 1

0.75 MG IE2 +60 3500 2

1.1 - 22 MG IE2 +60 3500 2

30-45 Siemens IE2 +55 2750 3

TM04 4914 2209

TM02 7854 4303

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

100

[%]

t[°C]

1000 2250 3500 4750 m

-20 -10 0 10 20 30 40 50 60 70 80 90 100 110

p [bar]

HUUE / HUUV

t [°C]

English (GB)

6.3 Minimum flow rate

Due to the risk of overheating, the pump must not be

used at flows below the minimum flow rate.

The curve below shows the minimum flow rate as a

percentage of the nominal flow rate in relation to the

liquid temperature.

Fig. 5 Minimum flow rate in relation to

temperature

6.4 Electrical data

See motor nameplate.

6.5 Maximum number of starts

7. Sound pressure level

The table below shows airborne noise emitted by

CRK and MTR pumps with motors fitted by

Grundfos.

TM04 5693 3809

Motor size

[kW]

Recommended maximum

number of starts per hour

0.06 - 0.18 100

0.25 - 2.2 250

3-4 100

5.5 - 11 50

15-22 40

30-45 8

40 50 60 70 80 90 100 110 120

t [°C]

Qmin

[%]

Motor

[kW] 50 Hz 60 Hz

0.37 50 55

0.55 50 53

0.75 50 54

1.1 52 57

1.5 54 59

2.2 54 59

3.0 55 60

4.0 62 66

5.5 60 65

7.5 60 65

11 60 65

15 60 65

18.5 60 65

22 66 70

30 71 75

37 71 75

45 71 75

LpA [dB(A)]

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