Grundfos MTH Series User manual

MTH
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

2

3
Table of contents
MTH
English (GB)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Čeština (CZ)
Montážní a provozní návod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Deutsch (DE)
Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Dansk (DK)
Monterings- og driftsinstruktion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Español (ES)
Instrucciones de instalación y funcionamiento . . . . . . . . . . . . . . . . . . . . . . . . . 44
Suomi (FI)
Asennus- ja käyttöohjeet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Français (FR)
Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Magyar (HU)
Telepítési és üzemeltetési utasítás. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Italiano (IT)
Istruzioni di installazione e funzionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Latviešu (LV)
Uzstādīšanas un ekspluatācijas instrukcija. . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Nederlands (NL)
Installatie- en bedieningsinstructies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Polski (PL)
Instrukcja montażu i eksploatacji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Português (PT)
Instruções de instalação e funcionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Română (RO)
Instrucţiuni de instalare şi utilizare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Русский (RU)
Руководство по монтажу и эксплуатации . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Svenska (SE)
Monterings- och driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Slovenčina (SK)
Návod na montáž a prevádzku . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Operating manual EAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

English (GB)
4
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions
describe Grundfos MTH.
Sections 1-3 give the information necessary to be
able to unpack, install and start up the product in a
safe way.
Sections 4-8 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 4
1.1 Hazard statements 4
1.2 Notes 5
2. Installing the product 5
2.1 Mechanical installation 5
2.2 Tank mounting 5
2.3 Inlet conditions 7
2.4 Electrical connection 7
3. Starting up the product 9
3.1 Operating the product 9
4. Product introduction 9
4.1 Applications 9
4.2 Identification 9
5. Servicing the product 10
5.1 Contaminated products 11
5.2 Maintaining the product 11
5.3 Filters 11
5.4 Periodic checks 11
6. Fault finding the product 12
7. Technical data 13
7.1 Operating conditions 13
7.2 Sound pressure level 13
8. Disposing of the product 13
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)
5
1.2 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
2. Installing the product
2.1 Mechanical installation
2.2 Tank mounting
The pump is designed for tank mounting in vertical
position. The pump is positioned in a hole cut into
the cover of the tank (upper side) and is secured to
the tank by four hexagon head screws through the
holes in the mounting flange. We recommend that
you fit a sealing gasket between the pump flange
and tank.
Fig. 1 Pump mounting position
2.2.1 Filtration requirements
A filtration system must be installed in the tank
system to avoid that impurities in the liquid block the
pump.
Fig. 2 Example of a filtration system
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.
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.
MTH pumps must only be mounted
vertically.
TM07 0452 5117
TM07 0521 0118

English (GB)
6
2.2.2 Bypass pipe
Fig. 3 Example of a bypass pipe (A)
2.2.3 Installation dimensions
Fig. 4 Installation dimensions
Pump mounting flange dimensions
Fig. 5 Dimensional sketch
To reduce the risk of water hammer
damaging the pump, we recommend that
you install a bypass line.
TM07 0453 5117TM07 0454 5117
Measurement Dimension
B Depending on pump type.
C Depending on motor type.
X1 200 mm
X2 150 mm
Y1
This measurement must be at
least 30 mm longer than
measurement B to allow sufficient
space for removing the pump in
case of service and maintenance.
A
X1
X2
BY1C
TM00 4375 5298
Pump
type D1 D2 D3 L C X
MTH 2,
4 and 8 140 160 180 121 Rp 3/4 ∅7.5
MTH 10
and 15 180 210 250 132 Rp/G 1 1/4 ∅9
L
c
4 x X
D1
D2
D3

English (GB)
7
2.3 Inlet conditions
The bottom of the pump strainer must be at least 25
mm above the bottom of the tank. See fig. 6 or 7.
MTH pumps must be installed vertically, and the
drain hole in the motor stool must have access to the
tank.
The pumps are designed to provide full performance
down to a level of A mm above the bottom of the
strainer.
At a liquid level between A and B mm above the
bottom of the strainer, the built-in priming screw will
protect the pump against dry running.
Fig. 6 MTH 2, 4 and 8
Fig. 7 MTH 10 and 15
2.4 Electrical connection
Operating voltage and operating frequency are
stated on the motor nameplate. Check that the motor
is suitable for the power supply available at the
installation site.
The voltage quality for MG motors, measured at the
motor terminals, must be ± 10 % of the rated voltage
during continuous operation (including variation in
the supply voltage and losses in cables).
The electrical installation must be carried out by
authorised persons in accordance with local
regulations.
The wiring diagram is located in the terminal box
cover.
The terminal box of single-speed motors normally
contains six winding terminals and at least one earth
terminal.
Single-phase motor
Connect single-phase motors to the mains in
accordance with the instructions located in the
terminal box cover.
Three-phase motor
Three-phase motors can be connected in star (Y) or
delta (D) according to IEC 60034-8. See the wiring
diagram in the terminal box cover.
Voltage and connection are stated on the nameplate.
Example: 220-240 V D / 380-415 V Y
• If the voltage supply is 220-240 V, the motor must
be connected in delta.
• If the voltage supply is 380-415 V, the motor must
be connected in star.
Pump type A [mm] B [mm]
MTH 2, 4 and 8 37 25
MTH 10 and 15 40 28
TM07 0291 4717TM07 0290 4717
A
B
25mm
25mm
B
A
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 you can lock the main switch
in OFF position (isolated). Type and
requirements as specified in EN 60204-
1, 5.3.2.

English (GB)
8
2.4.1 Torque for terminal box cover screws
Torque: 1.6 - 2 Nm.
2.4.2 Motor protection
Single-phase motors
Single-phase motors are supplied with built-in
thermal protection, according to IEC 60034-11,
against thermal overload with both rapid and slow
variation.
Three-phase motors
Three-phase motors must be protected by a motor-
protective circuit breaker according to local
regulations.
MG motors of 3.0 kW or up are supplied with thermal
switches (PTC) as standard and are protected
against thermal overload with both rapid and slow
variation. The motor protection is stated on the
nameplate.
2.4.3 Terminal box positions
The terminal box can be turned to three positions, in
90° steps, see fig. 8.
Proceed as follows:
1. Remove the four bolts securing the motor to the
motor stool.
2. Turn the motor to the required position.
3. Replace and tighten the four bolts.
The electric motor must be connected to the supply
as shown in the diagram inside the terminal box
cover.
Fig. 8 Terminal box positions, top view
2.4.4 Plug connections
The pumps can be fitted with a 10-pin multiplug
connection, type Han® 10 ES.
The purpose of a multiplug connection is to make the
electrical installation and the service of the pump
easier.
Fig. 9 Multiplug connection on a Grundfos
motor
Fig. 10 Connections between motor terminals
and plug terminals
Fig. 11 Plug connections for star connection
Fig. 12 Plug connections for delta connection,
fishplates for connections are located in
the plug
TM02 7777 2513
Position 6
o'clock Position 9 o'clock Position 12 o'clock
Position 3
o'clock
TM05 8900 2813TM01 8702 0700TM01 8703 0700TM01 8704 0700
678910
12345
W2 U2 V2
U1 V1 W1
12345
678910
L1 L2 L3
123
45
678910
L1 L2 L3

English (GB)
9
2.4.5 Frequency converter operation
Motors supplied by Grundfos
All three-phase motors supplied by Grundfos can be
connected to a frequency converter.
Depending on the frequency converter type, this may
cause increased acoustic noise from the motor.
Furthermore, it may cause the motor to be exposed
to detrimental voltage peaks.
We recommend to protect all other motors against
voltage peaks higher than 850 V.
The above disturbances, that is both increased
acoustic noise and detrimental voltage peaks, can be
eliminated by fitting an LC filter between the
frequency converter and the motor.
For further information, please contact the frequency
converter supplier or Grundfos.
3. Starting up the product
Before starting the pump, make sure:
• that all pipe connections are tight
• that the pump body is partly filled with liquid
(partly submerged)
• that the strainer is not blocked by impurities.
Start the pump as follows:
1. Close the isolating valve on the outlet side of the
pump.
2. See the correct direction of rotation of the pump
on the motor fan cover. When seen from the top,
the pump must rotate counterclockwise.
3. Start the pump and check the direction of
rotation.
4. Slowly open the outlet valve until it is completely
open.
The pump has now been vented and is ready for
operation.
3.1 Operating the product
4. Product introduction
4.1 Applications
Grundfos pumps, type MTH, are multistage
centrifugal pumps designed for pumping liquids for
machine tools, condensate transfer, liquid transfer in
industrial washing machines and similar
applications.
The pumps are designed for pumping liquids with a
density and viscosity corresponding to those of
water. The pumped liquid must not contain abrasive
particles or fibres.
When pumping liquids with a density or viscosity
higher than that of water, the motor size must be
taken into consideration.
4.2 Identification
4.2.1 Type designation
The standard range consists of pumps with several
impeller and chamber combinations. On request,
other pump lengths can be supplied by fitting empty
intermediate chambers in combination with standard
impellers and chambers.
The type key on the pump nameplate indicates the
number of chambers and impellers fitted to the
pump.
Grundfos motors, types MG 71 and MG 80
as well as MG 90 (1.5 kW, 2-pole), for
supply voltages up to and including 440 V
(see motor nameplate), must be protected
against voltage peaks higher than 650 V
(peak value) between the supply terminals.
CAUTION
Fire and explosion
Minor or moderate personal injury
- Do not use the pump for flammable,
combustible or explosive liquids.
CAUTION
Hot liquid
Minor or moderate personal injury
- Do not run the pump against a closed
valve for more than approximately 5
minutes.
The pump is not allowed to run against a
closed outlet valve for more than
approximately 5 minutes as this will cause
an increase in temperature and formation
of steam in the pump which may cause
damage to the pump.

English (GB)
10
4.2.2 Type key 5. Servicing the product
Example MTH 2 -6 /3 -A -W -A -A QQ V
Pump type
Rated flow rate [m3/h]
Number of chambers
Number of impellers
Pump version
A Basic version
C Inlet pipe
X Special version
Pipe connection
W Internal thread
WB NPT internal thread
Materials
A Basic version
I Stainless steel pump head
Shaft seal
A O-ring seal with fixed seal driver
B Bellows seal, rubber
C O-ring seal with spring as seal driver
R O-ring seal, type A, with reduced
seal faces
A Carbon, metal-impregnated
B Carbon, resin-impregnated
Q Silicon carbide
U Tungsten carbide
V Metal oxides, ceramic
E EPDM
VFKM
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 you can lock the main switch
in OFF position (isolated). Type and
requirements as specified in EN 60204-
1, 5.3.2.
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.