Grundfos MTD Series User manual

MTD
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

Table of contents
2
MTD
English (GB)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
日本語 (JP)
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Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

English (GB)
3
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)
4
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.
50
Min. 50 mm

English (GB)
5
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)
6
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
50
P1W
1340
Qnom l/min200
Hnom m
14.0
fHz
50
UV220D / 380Y
I1/1 A
5.1/3.0
Imax A
5.4/3.2
Eff. %
IE3 84.2
fHz
60
P1W
2300
Qnom l/min
250
Hnom m
20.0
fHz
60
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
n
2 451
24
17
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
3
16
6
7
8
9
14
6
10
12
13
11
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)
7
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)
8
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)
9
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)
10
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