Grundfos MTR A 96889995 P1 1019 User manual

MTR
50/60 Hz IEC
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

MTR
English (GB)
Installation and operating instructions ..................................4
中文 (CN)
安装和使用说明书 ...............................................23
한국어 (KO)
설치 및 작동 지침 ...............................................41
繁體中文 (TW)
安裝操作手冊 ..................................................59
Appendix A...................................................76
Appendix B...................................................78
Declaration of conformity ........................................79
Declaration of conformity ........................................83
3
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 4
1.1 Hazard statements .............. 4
1.2 Notes ..................... 4
2. Product introduction ............ 5
2.1 Intended use ................. 5
2.2 Pumped liquids ................ 5
2.3 Identification.................. 6
3. Receiving the product............ 8
3.1 Transporting the product ........... 8
3.2 Inspecting the product ............ 8
3.3 Lifting the product ............... 8
4. Installation requirements .......... 9
4.1 Location .................... 9
5. Mechanical installation ........... 9
5.1 Mounting the product ............. 9
6. Electrical connection ............12
6.1 Changing the terminal box position .....12
6.2 Frequency converter operation ........12
7. Starting up the product ...........13
7.1 Preparing for startup .............13
7.2 Venting the product ..............14
8. Servicing the product ............14
8.1 Contaminated products ............15
8.2 Service documentation ............15
8.3 Maintenance .................15
9. Taking the product out of operation ....16
9.1 Taking the product permanently out of
operation ...................16
10. Fault finding the product ..........17
10.1 The motor does not run when started. ....17
10.2 The motor-protective circuit breaker trips
immediately when the power supply is
switched on ..................18
10.3 The motor-protective circuit breaker trips
occasionally ..................18
10.4 The motor-protective circuit breaker has
not tripped, but the motor does not run . ..18
10.5 The pump runs but gives no liquid, or the
pump performance is not constant ......19
10.6 Leakage from the shaft seal .........19
10.7 Noise .....................19
11. Technical data ................20
11.1 Operating conditions .............20
11.2 Electrical data .................21
11.3 MTRE 1s/1/3 HS high-speed operation . ..22
12. Disposing of the product ..........22
1. General information
Read this document before you install the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.
1.1 Hazard statements
The symbols and hazard statements below may
appear in Grundfos installation and operating
instructions, safety instructions and service
instructions.
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 seri-
ous personal injury.
CAUTION
Indicates a hazardous situation which, if
not avoided, could result in minor or mod-
erate personal injury.
The hazard statements are structured in the following
way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
Observe these instructions for explosion-
proof products.
A blue or grey circle with a white graphical
symbol indicates that an action must be
taken.
4
English (GB)

A red or grey circle with a diagonal bar,
possibly with a black graphical symbol, in-
dicates 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.
2. Product introduction
These installation and operating instructions describe
Grundfos MTR model A and model C pumps fitted
with 50 Hz or 60 Hz IEC motors.
MTR pumps are vertical multistage centrifugal
pumps designed to be mounted on top of tanks with
the chamber stack immersed in the pumped liquid. To
meet specific depths of tanks or containers, the
immersed length of the pump can be varied using
empty chambers.
The product consists of a motor and a pump unit.
Material versions for MTR
• A-version with wetted parts of cast iron and
stainless steel.
• I-version with wetted parts of stainless steel grade
EN/DIN 1.4301.
• N-version with wetted parts of stainless steel
grade EN/DIN 1.4401.
2.1 Intended use
The tank-mounted multistage centrifugal pumps are
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.
2.2 Pumped liquids
The product is suitable for pumping clean, thin, non-
aggressive and non-explosive liquids without solid
particles or fibres. The liquid must not attack the
pump materials chemically and mechanically.
When pumping liquids with a density and/or viscosity
higher than that of water, use motors with
correspondingly higher outputs, if required.
Whether a pump is suitable for a particular liquid
depends on a number of factors of which the most
important are the chloride content, pH-value,
temperature and content of chemicals and oils.
Aggressive liquids may attack or dissolve
the protective oxide film of the stainless
steel and thus cause corrosion.
5
English (GB)

2.3 Identification
2.3.1 Nameplate for MTR, MTRE
Type MTR10-6/3 A-W-A-HUUV
Model A 96889995 P1 1019
f 50 Hz 1.1P2 kW
30.3 mmin Hmax2853n
Q 10 m /h H 22.7 m
CCWbar/ C25/90
Made in Hungary
pmax/tmax
Serial No. 0001
MEI 0.70 p
°
η
3
-1
DK-8850 Bjerringbro, Denmark
--.-
1 2 3 4 5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 20
TM055279
Example of a pump nameplate
Pos. Description
1 Type designation
2 Model
3 Product number
4 Production code
5 Production year and week (YYWW)
6Power at rated flow rate and rated speed
(P2)
7 Head against closed valve
8 Head at rated flow rate
9 Direction of rotation:
CCW: Counterclockwise
CW: Clockwise
10 Country of origin
11 Approval marks
12 Frequency
13 Rated speed
14 Rated flow rate
15 Maximum system pressure/maximum liquid
temperature
16
Technical file number (stated if the pump is
ATEX-classified) or customer-specific infor-
mation
Pos. Description
17 Serial number (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 at rated flow rate
Related information
3.2 Inspecting the product
2.3.2 Type key for MTR, MTRE
Example of a pump type key.
MTRE 32-2/1-1 A-F-A-HUUV
Code Explanation
MTR Pump type
E Pump with integrated frequency converter
32 Rated flow rate [m3/h]
2 Number of chambers
1 Number of impellers
1 Number of impellers with reduced diameter
A Code for pump version
F Code for pipe connection
A Code for materials
Code for shaft seal:
H • Shaft seal type designation
U • Seal face material (rotating seal face)
U • Seal face material (stationary seal face)
V • Secondary seal material (rubber parts)
6
English (GB)

A
B
TM014993
Number of chambers (A) and number of impellers
(B)
Related information
5.1.2 Horizontal mounting of version H pumps
2.3.2.1 Key to codes
Note that each individual pump type is not available in
all variants.
Code Description
Pump version
A Basic version
B Oversize motor
C Inlet pipe
D Drainage back to tank
E Pump with certificate/approval
F 120 °C version
H Horizontal version
HS High pressure
J E-pump with different maximum speed
L With extension pipe
P Undersize motor
T Double oversize
X Special version
Pipe connection
F DIN flange
G ANSI flange
J JIS flange
Code Description
M Square flange
W Internal thread
WB NPT internal thread
X Special version
Materials
A Basic version
I Wetted parts EN/DIN 1.4301 / AISI 304
N Wetted parts EN/DIN 1.4401 / AISI 316
X Special version
Shaft seal type designation
A O-ring seal with fixed seal driver
B Bellows seal, rubber
C O-ring seal with spring as seal driver
H Balanced cartridge seal with O-ring
R O-ring seal, type A, with reduced seal faces
Seal face material (rotating and stationary seal
face)
A Carbon, metal-impregnated
B Carbon, synthetic resin-impregnated
Q Silicon carbide
U Cemented tungsten carbide
V Metal oxides, ceramic
Secondary seal material (rubber parts)
E EPDM
FFXM (Fluoraz®)
KFFKM (Kalrez®)
P NBR
VFKM (Viton®)
7
English (GB)

3. Receiving the product
3.1 Transporting the product
WARNING
Falling objects
Death or serious personal injury
‐Secure the product during transport to
prevent it from tilting or falling down.
CAUTION
Back injury
Minor or moderate personal injury
‐Use lifting equipment.
CAUTION
Crushing of feet
Minor or moderate personal injury
‐Wear safety shoes when moving the
product.
3.2 Inspecting the product
Before installing the product, do the following:
1. Check that the product is as ordered.
2. Check that no visible parts have been damaged.
3. If parts are damaged or missing, contact your
local Grundfos sales company.
Related information
2.3.1 Nameplate for MTR, MTRE
3.3 Lifting the product
WARNING
Falling objects
Death or serious personal injury
‐Do not use the motor eyebolts to lift the
entire product if the pump is fitted with
a motor of another make than Grund-
fos MG and MGE.
‐Follow the lifting instructions.
‐Use lifting equipment which is ap-
proved for the weight of the product.
‐Persons must keep a safe distance to
the product during lifting operations.
‐Wear personal protective equipment.
Note that typically the centre of gravity of
the pump is close to the motor.
3.3.1 Lifting the product in vertical position
To lift the entire pump with motor, follow the below
instructions for the size and type of motor fitted on
your pump. Valid for motors up to 45 kW.
Pumps with motor sizes 0.37 - 5.5 kW
Valid for Grundfos MG, MGE and for all types of
sourced motors.
• Lift the product in the motor flange by means of
straps or similar lifting equipment.
TM068597
Pumps with motor sizes 7.5 - 22 kW
Valid for Grundfos MG and MGE motors only.
• Lift the product by means of the motor eyebolts.
TM068598
8
English (GB)

Pumps with motor sizes 7.5 - 45 kW
Valid for all types of sourced motors. Not valid for
Grundfos MG and MGE.
• Lift the product by means of the lifting brackets on
the motor flange.
TM068599
4. Installation requirements
4.1 Location
The product is intended for indoor use. If you install
the product outdoors, follow the requirements in the
section on outdoor installation.
Related information
4.1.1 Outdoor installation
4.1.1 Outdoor installation
When the pump is 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.
Related information
4.1 Location
5. Mechanical installation
WARNING
Moving parts
Death or serious personal injury
‐Tighten the coupling screws to the cor-
rect 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 product must be installed so that
persons cannot accidentally come into
contact with the hot surface of the mo-
tor.
5.1 Mounting the product
The pump is designed for tank mounting in vertical
position. For horizontal mounting, see the section on
MTR version H.
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.
9
English (GB)

D1
D2
D3
4 x X
C
L
TM028042
Vertical installation
Mounting flange dimensions:
Pump type D1 *D2 *D3 *L*CX*
MTR 1s, 1, 2,
3, 4, 5, 8
version A
140 160 180 100
Rp 1
1/4
G 1 1/4
∅7.5
MTR 1s, 1, 2,
3, 4, 5, 8
version I, N
140 160 180 100
Rp 1
1/4
G 1 1/4
∅9
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
*The numbers are indicated in millimetres.
5.1.1 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
protects the pump against dry running.
MTR 32, 45 and 64 pumps have no priming screw.
Pump type A
[mm]
B
[mm]
MTR 1s, 1, 2, 3, 4, 5, 8 41 28
MTR 10, 15, 20 50 25
MTR 32, 45, 64 70 -
The distance between the flange and the liquid level
must be minimum 25 mm.
The distance between the pump and the tank bottom
must be minimum 25 mm.
A
B
25 mm
25 mm
TM072800
MTR 1s, 1, 2, 3, 4, 5, 8
10
English (GB)

BA
25 mm
25 mm
TM059087
MTR 10, 15, 20
A
25 mm
25 mm
TM059085
MTR 32, 45, 64
5.1.2 Horizontal mounting of version H pumps
MTR, MTRE version H pumps are suitable for
horizontal mounting. The pump head is fitted with a
plug in the drain hole.
TM071679
Horizontally installed MTR version H pump
TM071680
Horizontally installed MTR version H pump with foot
support
• Check the pump nameplate to confirm that the
pump is suitable for horizontal mounting.
The code for the pump version must be H. See
the section on type key.
• Check if the motor needs support. Motors from 5.5
kW and up have a foot and must be supported.
• Fit a sealing gasket or similar between the pump
flange and the tank to prevent leakage.
Drain the tank before changing the shaft
seal.
Pump version H for horizontal mounting is
available for MTR, MTRE 1s, 1, 2, 3, 4, 5,
8, 10, 15 and 20. MTR, MTRE 32, 45, 64
pumps must be installed in a vertical posi-
tion.
Related information
2.3.2 Type key for MTR, MTRE
11
English (GB)

6. Electrical connection
WARNING
Electric shock
Death or serious personal injury
‐Switch off the power supply before you
start any work on the product.Make
sure that the power supply cannot be
switched on accidentally.
‐Connect the product to an external
main switch close to the product 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 re-
quirements as specified in EN
60204-1, 5.3.2.
All electrical connections must be carried
out by a qualified electrician in accordance
with local regulations.
Check that the supply voltage and fre-
quency correspond to the values stated on
the nameplate.
Carry out the electrical connection as
shown in the wiring diagram located inside
the terminal box cover.
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.
6.1 Changing the terminal box position
WARNING
Electric shock
Death or serious personal injury
‐Switch off the power supply before you
start any work on the product. Make
sure that the power supply cannot be
switched on accidentally.
The terminal box can be turned to four positions in
90° steps.
270o
180o
90o
0o
TM004257
Terminal box positions, top view
Follow this procedure to change the terminal box
position:
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. Refit and tighten the bolts.
5. Refit the coupling guards.
6.2 Frequency converter operation
You can use three-phase motors for frequency
converter operation following the conditions below.
This section applies to motors defined in IEC 60034.
Related information
10.7 Noise
6.2.1 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).
12
English (GB)

6.2.2 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 a
power cable length less than 25 m and a mains
supply up to 460 V, no additional motor protection
against voltage peaks is required. For frequency-
converter-operated motors with a power cable length
of more than 25 m or a 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.
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 insula-
ted bearings from frame size 225.
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-wave 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 supplied by Grundfos
You can connect all three-phase MG motors with
phase insulation to a frequency converter.
Other motor makes than those supplied by
Grundfos
Contact Grundfos or the motor manufacturer.
6.2.3 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 460 V or above have phase
insulation.
Frequency converter operation of MG mo-
tors without phase insulation will cause
damage to the motor.
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, that is
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. Starting up the product
CAUTION
Too high pressure and leakage
Minor or moderate personal injury
‐Do not run the product against a
closed outlet valve for more than ap-
proximately 5 minutes.
7.1 Preparing for startup
• Make sure that all pipe connections are tight,
stress-free and sealed.
• Make sure that the pump is immersed to the
recommended level and that it is partly filled with
liquid.
• Make sure that the liquid level in the tank is above
the minimum immersion depth.
• Make sure that the strainer or chip trays are not
blocked by impurities.
• Make sure that all safety equipment is installed
and tested for functionality.
13
English (GB)

7.2 Venting the product
Make sure that the pump is immersed and
partly filled with liquid before starting it.
1. Close the isolating valve on the outlet side of the
pump and open the isolating valve on the inlet
side.
2. If the pump is fitted with a vent valve, open the
valve (pos. 1).
1
TM016428
3. See the correct direction of rotation of the pump
on the motor fan cover or on the coupling guard.
TM075491
4. Start the pump and check the direction of
rotation. If the direction of rotation is wrong,
interchange two phases to the motor in the power
supply.
5. Open the isolating valve on the outlet side of the
pump a little.
6. If the pump is fitted with a vent valve, close the
valve when a steady flow of liquid runs out of it.
7. Completely open the isolating valve on the outlet
side of the pump.
The pump has now been vented and is ready for
operation.
8. Servicing the product
WARNING
Electric shock
Death or serious personal injury
‐Switch off the power supply before you
start any work on the product.Make
sure that the power supply cannot be
switched on accidentally.
WARNING
Moving parts
Death or serious personal injury
‐Tighten the coupling screws to the cor-
rect torque.
‐Install the coupling guards securely to
the pump with the screws intended for
this purpose.
WARNING
Falling objects
Death or serious personal injury
‐Do not use the motor eyebolts to lift the
entire product if the pump is fitted with
a motor of another make than Grund-
fos MG and MGE.
‐Follow the lifting instructions.
‐Use lifting equipment which is ap-
proved for the weight of the product.
‐Persons must keep a safe distance to
the product during lifting operations.
‐Wear personal protective equipment.
CAUTION
Corrosive liquids
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Toxic liquids
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
‐Wear personal protective equipment.
14
English (GB)

CAUTION
Hot or cold surface
Minor or moderate personal injury
‐Make sure that no one can accidentally
come into contact with hot or cold sur-
faces.
8.1 Contaminated products
CAUTION
Biological hazard
Minor or moderate personal injury
‐Flush the pump thoroughly with clean
water and rinse the pump parts in wa-
ter after dismantling.
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 pumped 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 pumped 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.
Related information
9.1 Taking the product permanently out of operation
8.2 Service documentation
Pumps
Service instructions and service kits are available in
Grundfos Product Center at http://product-
selection.grundfos.com.
Grundfos motors
Service documentation is available in Grundfos
Product Center at http://product-
selection.grundfos.com. If you have any questions,
please contact the nearest Grundfos company or
service workshop.
Sourced motors of other makes than Grundfos
Contact the motor manufacturer.
8.3 Maintenance
8.3.1 Periodic checks
Make the following checks at regular intervals,
depending on the conditions and time of operation.
• Check the quantity of liquid and the operating
pressure.
• Check that there are no leaks.
• Check that the motor is not overheating.
• Check the tripping function of the motor-protective
circuit breaker.
• Check that all controls are operating satisfactorily.
If the above checks do not reveal any abnormal
operating details, no further checks are necessary.
Should any faults be found, check the symptoms
according to the section on fault finding the product.
Related information
10. Fault finding the product
8.3.2 Pump
Pump bearings and shaft seal are maintenance-free.
8.3.3 Filters
Clean chip trays and filters at regular intervals to
ensure a correct flow of liquid. This will also increase
the life of the pump.
8.3.4 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, 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 tables
below.
• The tables apply to 2-pole motors.
• Intervals for 4-pole motors are twice as long as
those for 2-pole motors.
If the ambient temperature is lower than 40 °C,
replace or lubricate the bearings at the same intervals
as for 40 °C.
Intervals for 2-pole motors:
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 750
*The number of operating hours stated for bearing
replacement are guidelines only.
15
English (GB)

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 -
8.3.5 Coupling adjustment
For adjustment of the coupling in MTR 1s to 20, see
the drawings in the appendix.
For adjustment of the coupling in MTR 32, 45, 64,
see the drawings in the appendix.
Related information
A.1. Coupling adjustment of MTR 1s to 20
A.2. Coupling adjustment of MTR 32, 45, 64
9. Taking the product out of operation
9.1 Taking the product permanently out of
operation
WARNING
Electric shock
Death or serious personal injury
‐Switch off the power supply before you
start any work on the product.Make
sure that the power supply cannot be
switched on accidentally.
WARNING
Falling objects
Death or serious personal injury
‐Do not use the motor eyebolts to lift the
entire product if the pump is fitted with
a motor of another make than Grund-
fos MG and MGE.
‐Follow the lifting instructions.
‐Use lifting equipment which is ap-
proved for the weight of the product.
‐Persons must keep a safe distance to
the product during lifting operations.
‐Wear personal protective equipment.
CAUTION
Corrosive liquids
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Toxic liquids
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
‐Make sure that no one can accidentally
come into contact with hot or cold sur-
faces.
The product will be classified as contaminated if it has
been used for a liquid which is injurious to health or
toxic.
Related information
8.1 Contaminated products
16
English (GB)

10. Fault finding the product
WARNING
Electric shock
Death or serious personal injury
‐Switch off the power supply before you
start any work on the product.Make
sure that the power supply cannot be
switched on accidentally.
WARNING
Moving parts
Death or serious personal injury
‐Tighten the coupling screws to the cor-
rect torque.
‐Install the coupling guards securely to
the pump with the screws intended for
this purpose.
CAUTION
Corrosive liquids
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Toxic liquids
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
‐Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
‐Make sure that no one can accidentally
come into contact with hot or cold sur-
faces.
Related information
8.3.1 Periodic checks
10.1 The motor does not run when started.
Cause Remedy
Power supply failure. Connect the power supply.
One or more fuses are blown. Replace the fuses.
The motor-protective circuit breaker has tripped. Reactivate the motor-protective circuit breaker.
The thermal protection has tripped. Reactivate the thermal protection.
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.
The control circuit is defective. Repair the control circuit.
The motor is defective. Replace the motor.
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English (GB)

10.2 The motor-protective circuit breaker trips immediately when the power supply is
switched on
Cause Remedy
A fuse is blown or the motor-protective circuit breaker
has tripped.
Replace the fuse or reset the motor-protective circuit
breaker.
The contacts in the motor-protective circuit breaker
are faulty.
Replace the motor-protective circuit breaker contacts.
The cable connection is loose or faulty. Fasten or replace the cable connection.
The motor winding is defective. Replace the motor.
The pump is mechanically blocked. Remove the mechanical blocking of the pump.
The overload setting for the motor-protective circuit
breaker is too low.
Set the motor-protective circuit breaker correctly.
10.3 The motor-protective circuit breaker trips occasionally
Cause Remedy
The overload setting for the motor-protective circuit
breaker is too low.
Set the motor-protective circuit breaker correctly.
The voltage is low at peak times. Ensure a constant power supply.
10.4 The motor-protective circuit breaker has not tripped, but the motor does not run
Cause Remedy
Power supply failure. Connect the power supply.
One or more fuses are blown. Replace the fuses.
The thermal protection has tripped. Reactivate the thermal protection.
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.
The control circuit is defective. Repair the control circuit.
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English (GB)

10.5 The pump runs but gives no liquid, or the pump performance is not constant
Cause Remedy
The pump strainer is partly blocked by impurities. Clean the strainer.
The liquid level in the tank is too low. Increase the liquid level.
The pump draws in air. Check the inlet conditions.
10.6 Leakage from the shaft seal
Cause Remedy
The shaft seal is defective. Replace the shaft seal.
10.7 Noise
Cause Remedy
Cavitation. Check the inlet conditions.
The pump does not rotate freely because of an
incorrect pump shaft position (frictional resistance).
Adjust the pump shaft.
Frequency converter operation. Frequency converter operation may cause increased
acoustic noise from the motor. Make sure to protect the
motor against voltage peaks and dU/dt according to IEC
60034-17.
For noise-critical applications, fit an output filter between
the motor and the frequency converter to reduce the
voltage peaks. For particularly noise-critical
applications, fit a sinusoidal filter.
See Grundfos recommendations in the section on
frequency converter operation.
Related information
6.2 Frequency converter operation
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English (GB)

11. Technical data
11.1 Operating conditions
11.1.1 Operating pressure and liquid temperature
Pump type MTR
Minimum liquid temperature [°C] -10
Maximum liquid temperature [°C] 90
(120*)
Maximum operating pressure [bar] 25
*Applies to MTR pump version F.
The maximum liquid temperature depends on the
shaft seal type and the pump type. The maximum
liquid temperature is stated on the pump nameplate.
11.1.2 Maximum permissible operating pressure
and liquid temperature for the shaft seal
11.1.2.1 Shaft seals for MTR, MTRE
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110
0
5
10
15
20
25
30
35
p [bar]
HUUE / HUUV
t [°C]
TM027854
Maximum permissible operating pressure and liquid
temperature for the shaft seal.
Shaft
seal *Description
Tempera-
ture range
[°C]
HUUE/
HUUV
O-ring seal (cartridge type),
balanced, tungsten carbide/
tungsten carbide, HUUE/
HUUV (EPDM/FKM)
-10 to +90
*Other shaft seals on request.
11.1.3 Minimum flow rate
The curve shows the minimum flow rate as a
percentage of the rated flow rate in relation to the
liquid temperature.
40 50 60 8070 90 100
10
0
20
30
110 120
[%]
Qmin
t [ C]
O
TM045693
Minimum flow rate in percentage of the rated flow
rate
Do not use the pump at flow rates below
the minimum flow rate. The motor risks
overheating.
11.1.4 Ambient temperature and altitude
The table shows the maximum permissible ambient
temperature at full load and the maximum permissible
installation altitude above sea level at full load.
Motor pow-
er
[kW]
Motor make
Max. am-
bient tem-
perature
[°C]
Max. alti-
tude
[m]
0.06 - 0.18 Siemens 40 1000
0.25 - 0.55 Grundfos
MG 40 1000
0.75 - 22 Grundfos
MG 60 3500
30-45 Siemens 55 2750
Motor output derating factors
If the ambient temperature exceeds the maximum
permissible temperature value or the pump is
installed at an altitude exceeding the maximum
permissible altitude value, 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.
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English (GB)