Grundfos CRK 2 Bedienungsanleitung

CRK, MTR

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions

CONTENTS

Page

1. Symbols used in this document

2. Handling

When the entire pump is to be lifted, observe the

following:

• CRK and MTR pumps fitted with a Grundfos MG

motor up to 0.75 kW should be lifted in the pump

head by means of straps or the like.

• CRK and MTR pumps fitted with a Grundfos MG

motor from 1.1 to 22 kW must be lifted by means

of the lifting eyes.

• For other motor makes than those mentioned

above, we recommend to lift the pump in the

pump head by means of straps.

1. Symbols used in this document 2

2. Handling 2

3. Applications 3

3.1 Pumped liquids 3

4. Identification 3

4.1 Nameplate for CRK and MTR 3

4.2 Type key for CRK 4

4.3 Type key for MTR, MTRE 5

5. Technical data 6

5.1 Ambient temperature 6

5.2 Maximum permissible operating pressure

and liquid temperature for the shaft seal 6

5.3 Minimum flow rate 7

5.4 Electrical data 7

5.5 Maximum number of starts 7

6. Installation 7

6.1 Pump location 7

6.2 Suction conditions 8

7. Electrical connection 9

7.1 Frequency converter operation 9

7.2 Other motor makes 9

8. Start-up 10

8.1 Before starting the pump 10

8.2 Starting the pump 10

9. Maintenance 10

9.1 Filters 11

9.2 Periodic checks 11

10. Service 11

10.1 Service kits 11

10.2 Coupling adjustment 11

11. Sound pressure level 11

12. Fault finding 12

13. Disposal 13

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.

English (GB)

3. 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.

3.1 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.

4. Identification

4.1 Nameplate for CRK and MTR

Fig. 1 Example of nameplate

Warning

Do not use the pump for flammable liquids,

such as diesel oil and petrol.

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: Counter-clockwise

CW: Clockwise

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

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

English (GB)

4.2 Type key for CRK

*) See fig. 2.

Fig. 2 Number of chambers / impellers

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 pipework connection

Code for materials

Code for shaft seal and rubber pump parts

TM01 4991 1299

Number of

impellers

Number of

chambers

English (GB)

4.3 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 Suction 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)

5. Technical data

* Applies to pump version F

5.1 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 % x 78 % = 68.6 %

of rated output.

5.2 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. 3

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)

5.3 Minimum flow rate

Due to the risk of overheating, the pump should 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

Note: The pump must never operate against a

closed discharge valve.

5.4 Electrical data

See motor nameplate.

5.5 Maximum number of starts

6. Installation

6.1 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. 6 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. 7 Horizontally installed MTR with foot

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

[%]

Warning

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

Caution

For horizontally mounted pumps ensure a

sufficient sealing between pump flange

and tank. A sealing gasket will usually

suffice.

Caution

Before changing shaft seals for

horizontally mounted pumps, drain the

tank.

Caution

MTR 32, 45 and 64 pumps can only be

installed in vertical position.

Vertical Horizontal

English (GB)

Fig. 8 Vertical installation

Mounting flange dimensions:

6.2 Suction 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.

Note: MTR 32, 45 and 64 pumps have no priming

screw.

Fig. 9 CRK 2, 4 and MTR 1s, 1, 3, 5

Fig. 10 MTR 10, 15, 20

Fig. 11 MTR 32, 45, 64

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, 5 140 160 180 100 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

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 -

4 x X

TM05 7223 0813TM05 7224 0813TM05 7225 0813

25 mm

English (GB)

7. Electrical connection

The electrical connection should be carried out by an

authorized electrician in accordance with local

regulations.

The electrical connection should 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.

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. 12.

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. 12 Terminal box positions

7.1 Frequency converter operation

7.1.1 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.

7.2 Other motor makes

If other motors makes than those supplied by

Grundfos are used, contact Grundfos or the motor

manufacturer.

Warning

Before removing the terminal box cover

and before any removal/dismantling of the

pump, make sure that the power supply

has been switched off.

The pump must be connected to an

external mains switch with a minimum

contact gap of 3 mm in all poles.

TM00 4257 2294

0˚

90˚

180˚

270˚

Caution

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.

English (GB)

8. Start-up

8.1 Before starting the pump

• 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.

8.2 Starting the pump

1. Close the isolating valve on the discharge side of

the pump.

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

valve must be opened. See fig. 13.

Fig. 13 Position of the air 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 should rotate

counter-clockwise.

4. Start the pump and check the direction of

rotation.

5. Open the discharge pipe isolating valve a little.

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

valve must be closed when a steady flow of liquid

runs out of it.

7. Completely open the discharge pipe isolating

valve.

The pump has now been vented and is ready for

operation.

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 should be

lubricated with a high-temperature, lithium-based

grease. See the instructions on the fan cover.

In the case of seasonal operation (motor is idle for

more than 6 months of the year), we recommend to

grease the motor when the pump is taken out of

operation.

Depending on the ambient temperature, the motor

bearings must be replaced or lubricated 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,

bearings must be replaced/lubricated at the intervals

mentioned under 40 °C.

Warning

Pay attention to the direction of the vent

hole and take care to ensure that the

escaping water does not cause injury to

persons or damage to the motor or other

components.

TM01 6428 2399

Caution

Do not run the pump against closed

discharge valve for more than approx. 5

minutes as this will cause an increase in

temperature/formation of steam in the

pump which may cause damage to the

pump.

Air vent valve

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 -

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