Grundfos MTS Series User manual

MTS
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions
describe Grundfos MTS pumps.
Sections 1-4 give the information necessary to be
able to unpack, instal and start up the product in a
safe way.
Sections 5-12 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
1.3 Safety 3
2. Receiving the product 4
2.1 Delivery 4
2.2 Handling the product 4
3. Installing the product 5
3.1 General precautions 5
3.2 Electrical connection 10
4. Starting up the product 10
4.1 First start-up 10
5. Product introduction 11
5.1 Intended use 11
5.2 Identification 11
5.3 Applications 13
5.4 Pumped liquids 13
6. Handling and storing the product 13
6.1 Handling the product 13
6.2 Storing the product 13
6.3 Preparation for storage 13
6.4 Storage 13
6.5 Removing corrosion inhibitor 14
7. Operating conditions 14
7.1 Ambient temperature and altitude 14
7.2 Humidity 14
7.3 Sound pressure level 14
7.4 Filtration 15
8. Taking the product out of operation 16
9. Starting up the product after standstill 17
9.1 Test run of the stand-by pump (if
installed) 17
10. Servicing the product 17
10.1 Maintaining the product 17
10.2 Repairing the product 18
10.3 Ordering spare parts 18
10.4 Position numbers 19
10.5 Returning the pump to the manufacturer 19
10.6 Service documentation 19
11. Fault finding 20
12. Disposing of the product 22
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)
3
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
1.3 Safety
1.3.1 General safety instructions
Observe the following regulations before carrying out
any work.
Product safety
The pump has been designed according to the latest
technology and recognized technical safety
regulations. Nevertheless, the operation of the pump
can still put the life and health of the user or third
party at risk or cause damage to the pump or other
property.
• Only operate the pump if it is in perfect technical
condition and only use it as intended, being
always aware of safety and risks and complying
with the instructions in these installation and
operating instructions.
• Keep these installation and operating instructions
and all other applicable documents complete,
legible and accessible to personnel at all times.
• Keep the information on the pump in a complete
and legible condition.
• In the event of any safety-related malfunctions,
switch off the pump immediately and have the
malfunction corrected by qualified personnel.
• In addition to the safety instructions given in
these installation and operating instructions,
comply with statutory or other safety and
accident-prevention regulations as well as
standards and guidelines applying in the country
where the pump is operated.
Obligations of the operating company
Safety-conscious operation:
• Only operate the pump if it is in perfect technical
condition and only use it as intended (see section
5.1 Intended use).
• Make sure that the following safety regulations
are observed:
– statutory or other safety and
accident-prevention regulations
– safety regulations governing the handling of
hazardous substances
– relevant standards and guidelines applying in
the country where the pump is operated.
• Make personal protective equipment available.
• Make sure that all personnel working on the
pump have read and understood these
installation and operating instructions and all
other applicable documents, especially the
safety, maintenance and repair information,
before they start any work.
• Organize responsibilities, areas of competence
and the supervision of personnel.
• Make sure that the following activities are carried
out by specialist technicians only:
– fitting, repair and maintenance
– work on the electrical system.
• Make sure that trainee personnel only work on
the pump under supervision of specialist
technicians.
Safety equipment:
• Provide the following safety equipment and make
sure it is in working condition:
– guards protecting against hot, cold or moving
parts
– appropriate earthing protecting against
possible building-up of electrostatic charge
– appropriate safety valve on the discharge side
between the pump and the first isolating valve
if there is no pressure-relief valve.
Warranty:
Obtain the manufacturer's approval prior to carrying
out any modifications, repairs or alterations during
the warranty period.
Use only original spare parts approved by the
manufacturer.
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.
The manufacturer does not accept any
liability for damage caused by disregarding
the documentation.

English (GB)
4
Obligations of personnel
• Observe all instructions provided on the pump,
such as the arrow indicating the direction of
rotation and the markings for pipe connections.
• Use personal protective equipment when
carrying out any work on the pump.
• Avoid inappropriate use of pump and
components:
– Do not step on or use them as a climbing aid.
– Do not use them to support boards, ramps or
beams.
– Do not use them as a fixing point for winches or
supports.
– Do not use them for storing paper or similar
materials.
– Do not use hot pump or motor components as
a heating point.
– Do not de-ice using gas burners or similar
tools.
• Do not remove the safety guards protecting
against hot, cold or moving parts during
operation.
• Reinstall the safety equipment on the pump as
required by regulations after any work on the
pump.
1.3.2 Specific hazard
Observe the relevant safety regulations when
handling hazardous pumped liquids (hot, flammable,
poisonous or potentially harmful liquids).
2. Receiving the product
2.1 Delivery
1. Unpack the pump on delivery and inspect it for
transport damage.
2. Report any transport damage to the
manufacturer immediately.
3. Dispose of packaging material according to local
regulations.
2.2 Handling the product
• Use lifting gear designed for carrying the total
weight to be transported.
• Fasten the lifting gear as shown in fig. 1and fig.
2.
• For vertical lifting, provide a safety rope between
the hook and the motor eyebolt.
• Never fasten the lifting gear to the motor eyebolt,
unless used as a safety precaution against
tipping over (especially relevant for units with a
high centre of gravity).
• Do not stand under suspended loads.
Fig. 1 Vertical lifting
Fig. 2 Horizontal lifting
TM05 2419 5111
TM05 2420 5111

English (GB)
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3. Installing the product
3.1 General precautions
3.1.1 Preparations
Make sure the required ambient conditions are
fulfilled.
See section 7.1 Ambient temperature and altitude.
Pump location
Make sure the installation site meets the following
requirements:
• The pump must be freely accessible from all
sides.
• There must be sufficient space for the installation
or removal of the pipes and for maintenance and
repair work, especially for the installation or
removal of the pump and the motor.
• The pump must not be exposed to external
vibrations (damage to bearings).
• The pump must be protected against frost.
• The pump must be stable so that it cannot tip
over.
The mounting surface
Make sure the mounting surface fulfils the following
requirements:
• level
• clean (no oil, dust or other impurities)
• able to support the weight of the pump unit and
all operating forces.
3.1.2 Installation types
MTS pumps can be mounted in three types of
installation:
Tank-top installation
The pump is mounted on top of the tank using the
holes in the discharge casing flange. Thus discharge
casing and pump bracket are above the tank top.
Fig. 3 Tank-top installation
In-tank installation
The pump can also be mounted with discharge
casing and pump bracket inside the tank using the
holes in the motor flange. This type of installation
ensures that any leakage will remain in the tank.
However, this installation requires the motor to be
dismantled before the pump can be fastened to the
tank.
Fig. 4 In-tank installation
Do not stress the bearing or pass electrical
current through the bearing as this will
cause material damage.
Do not make any structural modifications
to the pump unit or pump housing.
Do not carry out any welding work on the
pump unit or pump housing.
Do not remove any plastic covers or screw
plugs until immediately before connecting
the pipes to the pump.
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.
TM04 4565 1609TM04 4566 1609

English (GB)
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Dry installation
Using the holes in the motor flange, the pump can be
fastened to a mounting foot which must be placed on
a level surface. The drain must point downwards, so
turn the pump cover on the drive side, if necessary. A
mechanical shaft seal ensures a long service life.
Fig. 5 Dry installation
3.1.3 Installing the motor
These instructions are only necessary if the pump
unit is to be assembled on site.
1. Apply a very thin coat of molybdenum disulfide
(such as Molykote®) to the shaft ends of pump
and motor.
2. Insert the shaft keys.
3. Slip on the pump-side and motor-side coupling
halves. Follow the description in Appendix,
section Coupling assembly.
– If a mounting fixture is not available, remove
the rubber bushes and heat the coupling
halves up to approximately 100 °C.
4. Tighten the set screws on both coupling halves.
5. Lift the motor and position it on the pump bracket.
6. Screw in the motor bolts.
3.1.4 Planning the pipes
Supports and flange connections
1. Calculate the pipe forces, taking every possible
operating condition into account, such as these:
– are flange loads according to EN ISO 14847?
– are pipes cold or warm?
– are pipes empty or full?
– are pipes depressurized or pressurized?
– have flanges changed position?
2. Make sure the used pipe supports do not
damage the pipes due to friction and do not lose
flexibility due to corrosion.
Pipe diameters
Keep the flow resistance in the pipes as low as
possible.
Suction side:
• Make sure the nominal suction pipe diameter is
not smaller than the nominal suction port
diameter.
• Make sure the flow velocity is below 1 m/s.
Discharge side:
• Make sure the nominal discharge pipe diameter
is not smaller than the nominal discharge port
diameter.
• Make sure the flow velocity is below 3.28 m/s.
3.1.5 Pipe lengths
Fig. 6 Recommended lengths of a straight pipe
to and from the pump suction and
discharge sides
A > 5 x nominal suction pipe diameter
B > 5 x nominal discharge pipe diameter
Observe the recommended minimum lengths of a
straight pipe when installing the pump.
Suction side: Shorter lengths of a straight pipe are
possible but may limit the hydraulic performance.
Discharge side: Shorter lengths of a straight pipe are
possible but can result in increased operating noise.
TM05 2769 0512
Keep the coupling halves properly aligned
when slipping them on.
Do not knock or hit any components of the
pump.
Keep the coupling halves properly aligned
when slipping them on.
Do not knock or hit any components of the
pump.
InletOutlet
Drain
TM05 2417 5111
Discharge
Suction

English (GB)
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3.1.6 Optimising flow conditions
1. Avoid bending radii that are smaller than 1.5
times the nominal pipe diameter.
2. Avoid abrupt changes of cross-section and
direction along the piping.
3.1.7 Handling leaks
1. Provide equipment for collecting and discharging
leaking liquids.
2. Make sure that leaking liquids can be freely
discharged.
3.1.8 Avoiding excessive pressure
1. Observe the operating instructions of the
manufacturer.
2. Make sure the settings of the pressure relief
valve meetthe requirements of the system.
3. Do not feed the return flow from the safety valve
directly back into the suction pipe.
3.1.9 Further safety and control equipment
(recommended)
• Install a dirt trap in the suction pipe (mesh size:
0.6 mm).
• Provide a fine filter, if necessary. See section
7. Operating conditions.
• Install a non-return valve between the discharge
flange and the isolating valve to ensure that liquid
does not flow back when the pump is stopped.
• Install isolating valves in the suction and
discharge pipes to facilitate maintenance and
repair work.
• Provide pressure gauges for pressure
measurements in the suction and discharge
pipes.
• Provide suction-side temperature measurements.
Only necessary for hot or hazardous pumped liquids:
• Provide leak monitoring equipment.
Collect any leaking pumped liquid and dispose of it in
accordance with local environmental rules and
requirements.
3.1.10 Connecting the pipes
Keeping the pipes clean
1. Flush all pipe parts and fittings prior to
connection.
2. Make sure that no flange seals protrude inwards.
3. Remove any blank flanges, plugs, protective foils
and/or protective paint from the flanges.
4. Remove any welding beads from welded pipes.
Connecting the suction pipe (if any)
1. Remove the transport screw plugs from the
pump.
– run the pipes with a continuous downward
slope towards the pump to avoid air pockets.
2. Make sure that no seals protrude inwards.
3. For tank-top and in-tank installations: Observe
the minimum immersion depth. See section
3.1.11 Liquid level.
Connecting the discharge pipe
1. Remove the transport screw plugs from the
pump.
2. Connect the discharge pipe.
3. Make sure that no seals protrude inwards.
Checking pipe connections for stress
1. Before checking, make sure that piping is
connected and cooled down.
2. Disconnect the pipe flanges from the pump.
3. Ensure that the pipes can be moved freely in all
directions within the expected range of
expansion:
– nominal diameter < 150 mm: By hand
– nominal diameter > 150 mm: With a small
lever.
4. Make sure that flange surfaces are parallel.
5. Reconnect the pipe flanges to the pump.
Remove any impurities in the pump before
connecting the pipes in order to avoid
material damage.

English (GB)
8
3.1.11 Liquid level
In order to protect the pumps and to ensure correct
performance, observe the requirements in the tables
below.
Fig. 7 Tank-top installation
TM05 3352 1312
Min. liquid level
Top of tank
Min. liquid level
A A
B
DQ D8.6
Pump A [mm] B [mm]
MTS 20 147 25
MTS 40 190 25
MTS 80 224 25
MTS 140 265 25
MTS 210 286 -
MTS 280 335 -
MTS 440 387 -

English (GB)
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Fig. 8 In-tank installation
3.1.12 Tightening torques
The values in the table apply to oiled screws when
using torque wrenches.
TM05 3353 1312
Motor
frame
size
MTS 20 MTS 40 MTS 80 MTS 140 MTS 210 MTS 280 MTS 440
C
[mm]
D
[mm]
C
[mm]
D
[mm]
C
[mm]
D
[mm]
C
[mm]
D
[mm]
C
[mm]
D
[mm]
C
[mm]
D
[mm]
C
[mm]
D
[mm]
100 131 427 131 482 - - - - - - - - - -
112 131 427 131 482 192 601 - - - - - - - -
132 154 450 154 506 192 601 200 675 215.5 732 - - - -
160 192 488 192 543 192 601 216 691 215.5 732 220.5 817 229 866
180 - - - - 208 617 216 691 215.5 732 220.5 817 229 866
200 - - - - 208 617 216 691 215.5 732 244.5 841 229 866
225 - - - - - - 246 721 245.5 762 250.5 847 261 898
250 - - - - - - - - 259.5 776 281.5 878 292 929
280 - - - - - - - - 259.5 776 281.5 878 292 929
315 - - - - - - - - - - 267.5 864 331 968
max. liquid level
min. liquid level
Top of tank
max. liquid level
min. liquid level
D
CB
D
C
DQ D8.6
Thread
size
Tightening torque [Nm] at strength
class
5.6 8.8 10.9
M6 3.9 8.8 13.2
M8 9.8 21.6 31.8
M10 18.6 43.1 63.0
M12 32.3 73.5 108
M16 78.4 181 264
M20 157 353 517
M24 289 662 890
M27 426 975 1304
M30 578 1323 1775

English (GB)
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3.2 Electrical connection
The operating voltage and frequency are marked on
the motor nameplate. Make sure that the motor is
suitable for the power supply on which it will be used
and the motor terminal connection is correct. You will
find a wiring diagram in the terminal box.
3.2.1 Frequency converter operation
All three-phase motors supplied by Grundfos can be
connected to a frequency converter. The frequency
converter must be set to operation with a constant
torque.
Dependent on the frequency converter type, this may
cause increased acoustic noise from the motor.
Furthermore, it may also 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 details, please contact your frequency
converter or motor supplier.
4. Starting up the product
Before starting-up the pump for the first time, make
sure that the following requirements have been
fulfilled:
• The pump is installed properly.
• The motor is installed properly.
• The operational data are according to the data on
the pump nameplate and technical data.
• All plastic covers have been removed.
• All pipe connections are stress-free and sealed.
• All safety equipment is installed and tested for
functionality.
• There is sufficient liquid level in the tank
(minimum immersion depth).
4.1 First start-up
4.1.1 Removing the corrosion inhibitor
Only necessary for pumps treated with corrosion
inhibitor.
See section 6.5 Removing corrosion inhibitor.
4.1.2 Priming
1. Moisten the mechanical shaft seal (only for
pumps with mechanical shaft seals) by removing
the upper screwed plug in the discharge casing
and filling in liquid. Refit the screwed plug (not
necessary for shaft seal ring version).
2. For tank-top and in-tank installations (fig. 7and
fig. 8), observe the minimum immersion depth.
See section 3.1.11 Liquid level.
3. Open the suction-side valve, if installed.
4. Fill the pump and suction pipe with pumped liquid
until pumped liquid comes out without bubbles.
5. Open the discharge-side valve.
6. Make sure that the discharge piping is not
blocked or leaky.
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.
The user is to consider whether it is
necessary to install an emergency stop
switch.
Grundfos motors type 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.
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.

English (GB)
11
4.1.3 Checking direction of rotation
1. Switch the motor on for some seconds.
2. Make sure the motor turns clockwise (viewed
from the motor fan).
3. If the direction of rotation is wrong, exchange two
phases in the power supply.
4.1.4 Start-up
1. Make sure that the pump is filled properly.
2. Open the threaded connection in the pump
bracket.
3. Open the discharge-side valve.
4. Open the suction-side valve.
5. Switch on the motor and check that it is running
smoothly.
6. Make sure the temperature rises at a rate of no
more than 2 °C/min.
7. Make sure the minimum discharge pressure is
higher than 2 bar.
8. After running at operating pressure and
temperature for a while, check that the pump is
not leaking.
9. Check if the filter system works properly and that
the pump is protected against entrained air, solid
particles and mud.
5. Product introduction
5.1 Intended use
• Only use the pump for the permissible pumped
liquids. See section 5.4 Pumped liquids.
• Make sure the pump is only operated with, and
never without, pumped liquid.
• Avoid cavitation:
– Open the suction-side valve completely and do
not use it to adjust the flow rate.
– Open the discharge-side valve completely.
• Avoid damage to the motor:
– Note the maximum permissible number of
starts per hour.
• Consult the manufacturer about any other use of
the pump.
• When a pump is supplied without motor, the
pump unit must fulfil the stipulations of the
Machinery Directive, 2006/42/EC.
Observe these instructions in order to avoid
misuse
• Do not operate the pump outside the operating
limits with regard to temperature, pressure,
viscosity, flow rate and motor speed.
• Do not operate the pump against closed
discharge-side valve.
• Do not use the pump for foodstuffs if the pump
has not been adapted accordingly.
• Only select the installation types described in the
installation and operating instructions:
– do not install the pump hanging in the pipe
– do not install the pump very close to sources of
extreme heat or cold
– do not install the pump too close to a wall.
5.2 Identification
5.2.1 Nameplate
Fig. 9 Example of nameplate
Do not start the pump to check the
direction of rotation until it has been filled
with liquid.
TM05 2355 0512
Pos. Description
1 Type designation (see type key)
2 Model (see model code)
3 Pressure [bar]
4 Kinematic viscosity [mm2/s]
5 Frequency [Hz]
6 Country of production
7 Speed [min-1]
8 Power consumption [kW]
9 Rated flow rate [l/min]
MTS20-80 R38 DQ PIPE
Type
Model A95009789 1149 P5 0001
13.8
4.4
2900
Assembled in Hungary
I/min
kW
min
Bar
mm /s
Hz
96764771
80
1
50
1
4
2
5
3
6
7
8
9

English (GB)
12
5.2.2 Type key
Model code
Example MTS (E) 80 -40 R 46 D 8.6
Type range
Frequency converter:
E = With integrated frequency converter
Blank = Without frequency converter
Frame size
Max. pressure [bar]
Screw sense of gradient:
R = right
Screw pitch angle in degrees
Construction:
D = External ball bearing, shaft seal unheated, uncooled
Shaft seal/pipe connection:
Q = Shaft seal ring/axial inlet, pipe thread as standard
8.6 = Mechanical shaft seal/radial inlet, SAE as standard
Example A 95009789 1149 P5 0001
Model
Product number
Production year and week
Place of production
Serial number

English (GB)
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5.3 Applications
MTS pumps are screw pumps designed for the
pumping of cooling lubricants and cutting oils for
machine tool applications such as:
• modern metal machining centres
• grinding and deep-hole drilling machines.
Pumps can transfer cooling lubricants with high
lubricating effect or high cooling performance based
on the customer's requirements.
5.4 Pumped liquids
The pumped liquids must not attack the pump
materials. The composition, oil content (ability to
provide lubrication) and cooling effect of the liquid
determine the pump maintenance intervals and
maximum permissible loading.
The permissible pumped liquids according to DIN
51385 are divided into three groups according to
water and oil content.
Solutions (L)
• Inorganic materials in water
• dispersions of organic and synthetic materials in
water.
Emulsions (E)
Oil in water, oil content E 2 % to E 20 %.
Cutting and grinding oils (S)
• without additives
• with polar, physically effective additives
• with mild-effect, lubricating film forming EP
additives
• with polar and mild-effect EP additives
• with active, chemical additives
• with polar and active EP additives.
6. Handling and storing the product
6.1 Handling the product
See section 2.2 Handling the product.
6.2 Storing the product
The pump has not been treated for storage from
factory.
6.3 Preparation for storage
Prepare the pump properly for storage both inside
and outside.
Use RUST-BAN 335, for example, as corrosion
inhibitor.
Applying corrosion inhibitor to the inside of the
pump
1. Close the suction-side flange with a blind flange.
2. Fill the pump with corrosion inhibitor.
3. Turn the shaft slowly by hand against the pump's
direction of rotation.
4. Continue filling and turning until corrosion
inhibitor comes out of the discharge-side flange
without bubbles.
5. Close the discharge-side flange with a blind
flange.
Applying corrosion inhibitor to the outside of the
pump
Apply corrosion inhibitor to all bare metal parts using
a brush or spray can.
6.4 Storage
1. Seal all openings with blind flanges, blind plugs
or plastic covers.
2. Make sure the storage room meets the following
conditions:
– dry
– frost-free
– vibration-free
– dust-free.
3. Turn the shaft once a month and make sure the
shaft and bearing change position in the process.
Main
group Effect at the processing spot
L High cooling effect, low lubricating effect
E Cooling and lubricating effect
S
High lubricating effect, low cooling effect
High surface adhesion providing
protection against corrosion
High temperature and pressure
resistance
Prepare the pump for storage as described
below to avoid material damage.

English (GB)
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6.5 Removing corrosion inhibitor
Only necessary for pumps treated with corrosion
inhibitor.
1. Choose among the following cleaning agents:
– benzene
– wax solvents
– diesel
– paraffin
– alkaline cleaner.
2. Remove the corrosion inhibitor from all bare
internal parts of the pump.
3. Dispose of cleaning agents in accordance with
local environmental rules and requirements.
4. For storage times exceeding six months:
– Replace the elastomer parts made of EPDM.
– Check all elastomer parts (O-rings, shaft seals)
for proper elasticity and replace them, if
necessary.
7. Operating conditions
7.1 Ambient temperature and altitude
If the ambient temperature exceeds the above
maximum temperatures or the pump is installed at an
altitude exceeding the above altitudes, 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.
If this is the case, it may be necessary to use a motor
with a higher rated output.
Fig. 10 The maximum motor output (P2)
depends on the ambient temperature
and altitude
Example:
Pump with a 2.2 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 than 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.
7.2 Humidity
Relative humidity: Max. 85 %.
7.3 Sound pressure level
Measuring conditions:
• Distance to the pump: 1 m
• Operation: Cavitation-free
• Motor: IEC standard motor
• Tolerance: ± 3 dB(A).
The MTS design allows gentle, even, virtually
pulsation-free and low-noise pumping. The noise
emission lies between 56 and 74 dB(A) depending
on speed, pump size and installation. MTS pumps
operate significantly quieter than rotary-lobe and
centrifugal pumps with comparable performance.
High water-pressure or spray water can
damage bearings.
Do not clean bearing areas with a water or
steam jet.
Using wrong cleaning agent may cause
damage to seals.
Make sure the cleaning agent does not
corrode the seals.
Motor power [kW] Motor make Motor efficiency class Maximum ambient temperature [°C] Maximum altitude above sea level [m]
2.2 - 22 MG IE2 +60 3500
30-200 Siemens IE2 +55 2750
TM05 2453 5111
Pos. Description
1 2.2 - 22 kW IE2 MG motors
2 30-200 kW IE2 Siemens motors
20 25 30 35 40 45 50 55 60 65 70 75 80
50
60
70
80
90
100
[%]
P2
1
t[°C]
1000 2250 3500 4750 m
2

English (GB)
15
7.4 Filtration
To reach an acceptable pump life, we recommend
the pumped liquids to be filtered to cleanliness class
according to ISO 4406/99. The recommended
cleanliness class depends on pumping pressure and
abrasive class 1 to 7. Process examples for abrasive
classes are shown in the table below.
The additional specifications for filter mesh and flow
rate are guiding values for orientation. The decisive
factor is the cleanliness of the liquids indicated by
the cleanliness class.
To avoid damage by solid particles, we advise to use
a filter mesh of 65 μm (nominal, two-dimensional) and
finer.
The data in below table are reference values. The
actual airborne sound pressure level depends
especially on the installation conditions.
Abrasive class
12 3 4567
Material Steel, cast
iron, Al
Steel, cast
iron, Al Al (Si > 5 %) Steel Steel, hard Tungsten carbide Titanium
Process Drilling Turning/
milling
Turning/
milling Grinding Grinding Grinding Grinding
Tool High speed
steel (HSS)
Tungsten
carbide
Tungsten
carbide Corundum Corundum CBN Diamond
Pressure level
≤120 bar
21/19/16 21/19/16 21/19/16 20/18/15 20/18/15 19/17/14 18/16/13
≤30 μm≤25 μm≤20 μm≤17 μm≤15 μm≤10 μm≤6 μm
≤30 mg/l ≤25 mg/l ≤20 mg/l ≤15 mg/l ≤10 mg/l ≤5 mg/l ≤3 mg/l
≤90 bar
22/20/17 22/20/17 22/20/17 21/19/16 21/19/16 20/18/15 19/17/14
≤50 μm≤45 μm≤40 μm≤30 μm≤20 μm≤15 μm≤10 μm
≤60 mg/l ≤50 mg/l ≤40 mg/l ≤30 mg/l ≤20 mg/l ≤10 mg/l ≤5 mg/l
≤60 bar
23/21/18 23/21/18 23/21/18 22/20/17 22/20/17 21/19/16 20/18/15
≤80 μm≤75 μm≤60 μm≤50 μm≤40 μm≤20 μm≤15 μm
≤120 mg/l ≤100 mg/l ≤80 mg/l ≤60 mg/l ≤40 mg/l ≤20 mg/l ≤10 mg/l
≤30 bar
24/22/19 24/22/19 24/22/19 23/21/18 23/21/18 22/20/17 21/19/16
≤150 μm≤120 μm≤100 μm≤80 μm≤60 μm≤40 μm≤20 μm
≤250 mg/l ≤200 mg/l ≤160 mg/l ≤120 mg/l ≤80 mg/l ≤40 mg/l ≤20 mg/l
Pump
LpA [dB(A)] for pump at speed
2900 [min-1] 3500 [min-1]
MTS 20 56 58
MTS 40 59 61
MTS 80 61 63
MTS 140 64 66
MTS 210 67 69
MTS 280 69 71
MTS 440 72 74

English (GB)
16
8. Taking the product out of operation
Take the following measures whenever the pump is shut down:
CAUTION
Corrosive liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Toxic liquids
Death or serious 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
surfaces.
The pump is to be... Action
... shut down for a
prolonged period: Take measures suited to the pumped liquids in the table below.
... emptied:
D8.6: Close the suction-side and discharge-side valves and drain the pump by
removing the drain plug and turning the pump manually until the pump is empty.
DQ: Close the discharge-side valve and empty the pump through the suction-side
by turning the pump manually.
... dismounted: Switch off the power supply, and make sure that it cannot be accidentally switched
on.
... stored: Follow the storage instructions (section 6.4 Storage).
Behaviour of the
pumped liquid
Duration of shutdown
(depending on process)
Short Long
1. Solids
sedimenting Flush the pump. Flush the pump.
2. Solidifying/
freezing,
non-corrosive
Heat up or empty pump and tanks. Empty pump and tanks.
3. Solidifying/
freezing,
corrosive Heat up or empty pump and tanks.
• Empty pump and tanks.
• Apply corrosion inhibitor to pump and
tanks.
4. Remaining liquid,
non-corrosive --
5. Remaining liquid,
corrosive -
• Empty pump and tanks.
• Apply corrosion inhibitor to pump and
tanks.

English (GB)
17
9. Starting up the product after
standstill
1. If the pump has been shut down for over six
years, take the following measures before
starting it up again:
– Replace elastomer seals (O-rings, shaft seal
rings).
– Replace anti-friction bearings in the pump.
– Replace the motor bearing, if necessary.
2. Carry out all steps as for the first start-up. See
section 4.1 First start-up.
9.1 Test run of the stand-by pump (if
installed)
Stand-by pump must be primed and vented.
Test run the stand-by pump at least once a week.
10. Servicing the product
10.1 Maintaining the product
10.1.1 Periodic checks
Make the following checks at regular intervals,
depending on the operational load on the pump:
• Check that temperature of anti-friction bearings <
70 °C.
• Check that normal operating conditions prevail.
• Check that the pressure relief valve is working.
For trouble-free operation, always ensure the
following:
• no dry running
• no leaks
• no cavitation
• suction-side isolating valves open
• unclogged and clean filters
• sufficient pump inlet pressure
• no unusual running noises or vibrations
• no excessive leakage at the shaft seal.
10.1.2 Bearings
Intermittent operation, high temperatures and
aggressive ambient and process conditions reduce
the service life of bearings.
Deep-groove ball bearings are according to DIN 625.
The bearings are greased-for-life (cannot be
relubricated) and have sealing washers on both
sides.
As a precaution, replace greased-for-life bearings
every two years (recommended).
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.
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
Corrosive liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Toxic liquids
Death or serious 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
surfaces.

English (GB)
18
10.1.3 Shaft seal
MTS pumps are available with two types of shaft
seal:
• mechanical shaft seal
• shaft seal ring.
Mechanical shaft seals are subject to natural wear
which strongly depends on the operating conditions.
Therefore, general statements regarding their
service life cannot be made.
Both mechanical shaft seals and shaft seal rings
have functional leaks. In the event of major leaks,
replace the shaft seal and its auxiliary seals.
10.2 Repairing the product
10.2.1 Dismantling
Before dismantling the pump, make sure the
following requirements have been fulfilled:
• The pump has been depressurized.
• The discharge-side isolating valve has been
closed.
• The pump is completely empty, flushed and
decontaminated.
• All electrical connections have been
disconnected and the motor cannot be
accidentally switched on again.
• Pump has cooled down.
• The coupling guard has been dismounted.
• The spacer has been removed (if coupling is a
spacer coupling).
• Auxiliary systems have been shut down,
depressurized and emptied.
• Pressure gauge lines have been dismounted.
Observe the following during dismantling:
• Mark the precise orientation and position of all
components before dismounting them.
• Dismantle components concentrically without
tilting them.
• For dismantling of the pump, see appendix,
section Constructional drawings.
10.2.2 Re-installing
Install the components concentrically without tilting
them, in accordance with the markings made.
Observe the following during re-installation:
• Always replace lost or damaged screws with
screws of the same strength class.
• Replace worn parts with genuine spare parts.
• Replace seals with new seals of the same
materials, inserting them in such a way that they
are unable to rotate.
• Tighten screws and nuts to the prescribed
tightening torques. See section 3.1.12 Tightening
torques.
• Clean all parts. Do not remove any markings.
• Assemble the pump. See Appendix, section
Constructional drawings.
• Install the pump in the system. See section
3. Installing the product.
10.3 Ordering spare parts
Parts which can be replaced can be found in the list
in section 10.4 Position numbers.
Please have the following information ready when
ordering spare parts:
• pump type
• model and serial number
• production year and week
• part number
• designation
• quantity.
For trouble-free replacement in the event of faults,
we recommend keeping a spare pump available on
site.

English (GB)
19
10.4 Position numbers
The position numbers in the table below refer to the
constructional drawings in the appendix. See
appendix, section Constructional drawings.
1) Can be ordered as seal ring kit.
2) Can be ordered as mechanical seal kit.
3) Is included in a repair kit.
For service kit numbers, please see Grundfos
Product Center
(http://product-selection.grundfos.com).
10.5 Returning the pump to the
manufacturer
Before returning the pump, make sure the following
requirements have been fulfilled:
• The pump has been depressurized.
• The pump is completely empty.
• All electrical connections have been
disconnected and the motor cannot be
accidentally switched on again.
• The pump has cooled down.
• The coupling guard has been dismounted.
• The spacer has been removed (if coupling is a
spacer coupling).
• Auxiliary systems have been shut down,
depressurized and emptied.
• Pressure gauge lines have been dismounted.
Before returning the pump to the manufacturer, take
necessary measures, depending on the required
repair work, as listed in the table below.
10.5.1 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.
10.6 Service documentation
Service documents are available in Grundfos
Product Center
(http://product-selection.grundfos.com).
Pos. Description
1 Discharge casing
2 Rotor housing
3 Pump bracket
4 Suction casing
12 Drive screw
13 Idler screw
21 Labyrinth seal
22 Labyrinth seal
23 Spacer ring
24 Spacer ring
263) Pressure balancing bush
1003) Gasket
1213) O-ring
1223) O-ring
129 O-ring
1403) Seal ring
160 Sealing plug
161 Sealing plug
1831) Shaft seal ring
1862) Mechanical shaft seal
200 Hexagon socket head cap screw
201 Stud bolt
214 Screw plug
220 Hexagon nut
2303) Thrust disc
251 Circlip
2523) Circlip
270 Inside ring
280 Rivet
290 Shaft key
2923) Deep-groove ball bearing
970 Nameplate
980 Plastic cover
981 Plastic cover
Repair to be
carried out... Action before return
... at the
customer's
premises:
• Dismount the defective
component and return it to
the manufacturer.
... at the
manufacturer's
premises:
• Flush the pump and
decontaminate it if it was
used for hazardous pumped
liquids.
• Return the complete pump
(not disassembled) to the
manufacturer.
... at the
manufacturer's
premises for
warranty repairs:

English (GB)
20
11. Fault finding
Possible faults are identified by a fault number in the
table below. This number identifies the cause and
remedy in the fault finding list.
If faults occur which are not specified in the following
table or cannot be traced back to the specified
causes, please consult Grundfos.
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.
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
Corrosive liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Toxic liquids
Death or serious 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
surfaces.
Fault
number Fault description Fault
number Fault description
1 Pump is not pumping 5 Unstable pump operation (jerks and noise)
2 Pump performance is insufficient 6 Pump is jammed
3 Pump performance is excessive 7 Pump is leaking
4 No inlet pressure 8 Excessive motor power input
Fault number
Cause Remedy
12345678
X-------Transportscrewplugsstill in place.
• Remove the transport screw
plugs.
• Dismantle the pump and inspect it
for dry-running damage.
X-------
Supply or suction pipe is closed by
the valve.
• Open the valve.
X---X---
Supply or suction pipe is not vented
properly or not filled up completely.
• Fill up the pump and/or pipes
completely and vent them.
X---X---
Formation of air pockets in the
supply or suction pipe.
• Install a venting device.
• Correct the pipe layout.
X - - - X - - - Discharge pipe is blocked. • Clean the discharge pipe.
X--XX---
Incorrect direction of rotation of the
pump.
• Exchange any two phases of the
motor power supply. See section
4.1.3 Checking direction of
rotation.
X - - X - X - - Pump is very dirty. • Dismount and clean the pump.