Grundfos MTD Series User manual

MTD

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

Table of contents

MTD

English (GB)

Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

日本語 (JP)

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Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions

These installation and operating instructions

describe Grundfos MTD pumps.

Sections 1-4 give the information necessary to be

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

safe way.

Sections 5-9 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 Symbols used in this document

The text accompanying the three hazard symbols

DANGER, WARNING and CAUTION is structured in

the following way:

1. General information 3

1.1 Symbols used in this document 3

2. Receiving the product 4

3. Installing the product 4

3.1 Mechanical installation 4

3.2 Pump position 4

3.3 Electrical connection 5

4. Starting up the product 5

5. Product introduction 6

5.1 Pumped liquids 6

5.2 Identification 6

6. Servicing the product 7

6.1 Contaminated products 7

6.2 Maintaining the product 7

7. Fault finding the product 8

8. Technical data 9

8.1 Vibration level 9

8.2 Sound pressure level 9

8.3 Dimensions 10

9. Disposal 11

Read this document before installing the

product. Installation and operation must

comply with local regulations and accepted

codes of good practice.

WARNING

Indicates a hazardous situation which, if

not avoided, could result in death or

serious personal injury.

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.

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.

English (GB)

2. Receiving the product

The pump is delivered in packaging specially

designed for manual transport, or transport by forklift

truck or similar vehicle.

3. Installing the product

3.1 Mechanical installation

The pump is designed for tank mounting in vertical

position. The pump is positioned in a hole in the

cover of the tank (upper side). It is secured to the

tank by four or two hexagon head screws through the

holes in the mounting flange. We recommend that

you fit a sealing gasket between the pump flange

and tank.

3.1.1 Tank size

Recommended tank size is 3 times the pump outlet

volume per minute.

3.2 Pump position

The pump can only be mounted in vertical position.

Provide a clearance of minimum 50 mm above the

motor to ensure cooling of fan-cooled motors.

The pump is designed for indoor operation only.

Fig. 1 Mounting position

In order to ensure safe transport, we

recommend that you transport the pump

with suitable lifting tools.

Use seal tape or liquid packing on threads

to avoid leakage from the pump and the

pipe connections.

Risk of damage to the pump. Pipes

connected to the pump must be supported,

so that their weight is not supported by the

pump.

Outlet tightening torque must be 50 Nm.

TM05 1690 4411

Note that a minimum clearance of 30 mm

from pump inlet and to the bottom of the

tank is required.

Make sure that there is always a clearance

of 25 mm to the mounting flange.

The motor must not be exposed to direct

water or liquid sprays.

Min. 50 mm

English (GB)

3.2.1 Terminal box positions

The terminal box can be turned to another position.

Fig. 2 Terminal box positions (top view)

Proceed as follows:

1. Remove the bolts securing the motor to the

pump.

2. Turn the motor to the required position.

3. Refit and tighten the bolts securing the motor to

the pump.

3.3 Electrical connection

The electric motor must be connected to the supply

as shown in the diagram inside the terminal box

cover.

The pump must be earthed. The electrical

connection must be carried out in accordance with

local regulations.

The operating voltage and frequency are marked on

the pump nameplate. Make sure that the motor is

suitable for the power supply on which it will be used.

4. Starting up the product

The pump can be started against an open or a

closed outlet valve.

Before starting the pump:

• Make sure that all pipe connections are tight.

• Make sure that the pump is immersed to the

recommended level.

• Make sure that chip trays are not blocked by

impurities.

Start the pump as follows

1. See the correct direction of rotation of the pump

on the motor fan cover or on the sight glass.

When seen from the top, the pump must rotate

counterclockwise.

2. Start the pump and check the direction of

rotation.

Fig. 3 Motor fan cover with indication of the

correct direction of rotation

TM06 8153 1216

DANGER

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.

We do not recommend operation via

frequency converter.

The motor must be connected to a motor-

protective circuit breaker.

WARNING

Rotating shaft

Death or serious personal injury

- Be sure that the coupling guard is in

place before starting the pump.

CAUTION

Hot surface

Minor or moderate personal injury

- Make sure that persons cannot

accidentally come into contact with the

hot surface.

TM04 8004 2610

English (GB)

5. Product introduction

The Grundfos pump, type MTD, is a multistage

centrifugal pump designed for the pumping of

cooling lubricants to filters for machine tools.

5.1 Pumped liquids

5.2 Identification

5.2.1 Nameplate

Fig. 4 Example of nameplate

DANGER

Fire and explosion

Death or serious personal injury

- Do not use the pump for flammable,

combustible or explosive liquids.

Liquids with a viscosity higher than the one

permitted can cause a decrease in motor

life time or lead to a motor failure.

Pumped liquid requirements

Maximum chip size [mm] 25

Maximum kinetic viscosity [mm2/s] 32

Permissible liquid temperature [°C] 0-60

TM05 1938 3911

tliq 60°C Pipe conn. Rp 1 1/2" DE 6306ZZ / NDE 6204ZZ

fHz

P1W

1340

Qnom l/min200

Hnom m

14.0

fHz

UV220D / 380Y

I1/1 A

5.1/3.0

Imax A

5.4/3.2

Eff. %

IE3 84.2

fHz

P1W

2300

Qnom l/min

250

Hnom m

20.0

fHz

UV220D / 380Y

I1/1 A

7.8/4.6

Imax A

8.2/4.8

Eff. %

IE3 85.5

min-1

2956

nmin-1

3481

2 451

23 252215

Type MTD 250-280/2 M-W-D-BQQP

PN 99045533 Model A PC 1617 SN 0001

Made in Korea

DK-8850 BJERRINGBRO DENMARK

Type MTD250-2

TEFC CONT Th.Cl F IP54 2Pole/S1 3Phase

P2(50/60)Hz 1.5/1.8 kW

18 19 20 21

Pos. Designation

1 Production code (YYWW)

2 Product number

3 Type designation (see type key)

4 Serial number

5 Model

6 Frequency

7 Supply voltage

8 Full-load current

9 Maximum current

10 Motor input power

11 Rated speed

12 Rated flow rate

13 Rated head

14 Efficiency class

15 Motor enclosure class

16 Motor insulation class

17 Rated P2

18 Maximum temperature of pumped liquid

19 Pipe connection

20 Motor drive-end bearing

21 Motor non-drive-end bearing

22 Number of poles / duty type

23 Totally enclosed fan cooling

24 Duty (continuous)

25 Phase

English (GB)

5.2.2 Type key 6. Servicing the product

6.1 Contaminated products

The product will be classified as contaminated if it

has been used for a liquid which is injurious to health

or toxic.

If you request Grundfos to service the product,

contact Grundfos with details about the liquid before

returning the product for service. Otherwise,

Grundfos can refuse to accept the product for

service.

Any application for service must include details

about the liquid.

Clean the product in the best possible way before

you return it.

Costs of returning the product are to be paid by the

customer.

6.2 Maintaining the product

6.2.1 Lubrication and maintenance

Pumps installed in accordance with these

instructions require very little maintenance.

The motor ball bearings are grease-packed and

sealed for life. No further lubrication is necessary.

If you need to replace a ball bearing, change the

bearing seal.

6.2.2 Filters

Clean chip trays, filters, etc. at regular intervals to

ensure a correct flow of liquid. This will also increase

the pump life.

6.2.3 Periodic checks

Make the following checks at regular intervals,

depending on the conditions and time of operation.

• Check the quantity of liquid and operating

pressure.

• Check that there are no leaks.

• Check that the motor is not overheating.

• Check the tripping of the motor-protective circuit

breaker.

• Check that all control devices are operating

satisfactorily.

If the above checks do not reveal any abnormal

operating details, no further checks are necessary.

Should any faults be found, see section 7. Fault

finding the product.

Example MTD 250 -280 /2 A -W -D -B QQ P

Pump type

Pump size

Installation length [mm]

Number of impellers or stages

Pump version

A = Standard version

Connection

W = Internal thread

WB = Internal NPT thread

Impeller material

A = PAA GF50

B = Bronze

C = Cast iron

D = Ductile cast iron

Shaft seal

A = O-ring seal

B = Bellows seal

Seal ring material

B = Carbon

Q = Silicon carbide

U = Tungsten carbide

V = Ceramic

Rubber material

P = NBR

V = FKM

CAUTION

Biological hazard

Minor or moderate personal injury

- Wear personal protective equipment

and take necessary protective

measures when handling the product.

English (GB)

7. Fault finding the product

WARNING

Automatic startup

Death or serious personal injury

- Before starting work on the product,

make sure that the power supply has

been switched off and cannot

accidentally be switched on.

Fault Cause Remedy

1. The motor does not

run when the power

supply is switched

on.

a) Supply failure. Connect the power supply.

b) The fuses are blown. Replace the fuses.

c) The motor-protective circuit

breaker has tripped. Reactivate the motor protection.

d) The main contacts in the motor-

protective circuit breaker are not

making contact or the coil is faulty.

Replace the contacts or the magnetic

coil.

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

f) The motor is defective. Replace the pump.

2. The motor-

protective circuit

breaker trips

immediately when

the power supply is

switched on.

a) The fuse on one phase is blown. Replace the fuse.

b) The contacts in the motor-

protective circuit breaker are

faulty.

Replace the contacts in the motor-

protective circuit breaker.

c) The cable connection is loose or

faulty. Fasten or replace the cable connection.

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

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

pump.

f) The overload setting is too low. Set the motor-protective circuit breaker

correctly.

3. The motor-

protective circuit

breaker trips

occasionally.

a) The overload setting is too low. Set the motor-protective circuit breaker

correctly.

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

4. The motor-

protective circuit

breaker has not

tripped, but the

pump does not run.

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

5. The pump runs, but

gives no liquid or the

pump performance

is not constant.

a) The pump inlet is partly blocked by

impurities. Clean the inlet.

b) The liquid level in the tank is too

low. Increase the liquid level.

c) The pump rotates in the wrong

direction.

Change the direction of rotation of the

motor by switching any two of the

phases.

d) A lot of bubbles in the liquid. Check the operating conditions.

e) The piping systems are blocked or

have high resistance. Check the piping system.

f) The impeller is damaged. Replace the impeller.

6. Noise and vibration

are high.

a) A bearing is damaged. Replace the bearing.

b) The pump is running single phase. Check the electrical connection.

c) Some parts have come loose. Check the installation conditions.

English (GB)

8. Technical data

8.1 Vibration level

* Vibration according to ISO 10816-1 class IB

8.2 Sound pressure level

Maximum permissible ambient

temperature [°C] +40

Permissible storage temperature

[°C] -50 to +70

Maximum operating pressure [bar] 7

Enclosure class according to IEC

60034-5 IP54

Motor insulation class F

Maximum voltage fluctuation

according to IEC 60034 ± 10 %

Recommended maximum number of

starts per hour

0-3 kW

≤200

3.7 →≤40

Dry running Not allowed

Maximum installation altitude 1000 m

Pay attention to condensation problems in

humid areas.

Vibration velocity RMS [mm/s]* < 1.8

Pump Rated P2

[W]

LpA [dB(A)]

50 Hz 60 Hz

MTD 250-XXX/2 1500/1800 < 70 < 70

MTD 250-XXX/3 2200/2500 < 70 < 70

MTD 250-XXX/4 3000/3700 < 75 < 75

English (GB)

8.3 Dimensions

8.3.1 Installation dimensions

Fig. 5 Installation dimensions

TM06 8248 1617

Min. 25 mm clearance from

liquid level

Min. 30 mm clearance to tank

bottom

Pump Dimensions

C [mm] B [mm] A [mm]

MTD250-230/2 291 230 521

MTD250-280/2 291 280 571

MTD250-330/2 291 330 621

MTD250-280/3 306 280 586

MTD250-330/3 306 330 636

MTD250-330/4 346 330 676

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