SCHMITT NHM Series User manual

Pump series NHM
Magnetically coupled
centrifugal pump
Original operating manual
Version
Print-No. 12375/1222
SCHMITT-Kreiselpumpen GmbH & Co. KG
Einsteinstraße 33
76275 Ettlingen
Germany
Phone: + 49 (0) 7243 / 54 53 - 0
Fax: + 49 (0) 7243 / 54 53 - 22
E-mail: [e-mail]
Internet: www.schmitt-pumpen.de
Subject to technical modifications.
Read carefully before use.
Save forfutureuse.

Table of contents
Table of contents
1 About this document ............................... 4
1.1 Target groups ................................. 4
1.2 Other applicable documents ................ 4
1.3 Warnings and symbols ....................... 5
2 General safety instructions ....................... 6
2.1 Intended use .................................. 6
2.2 General safety instructions .................. 6
2.2.1 Product safety ................................ 6
2.2.2 Obligations of the operating company . .... . 7
2.2.3 Obligations of personnel ..................... 7
2.3 Specific hazards .............................. 7
2.3.1 Potentially explosive atmospheres .. . . . . . . . . 7
2.3.2 Electric shock ................................. 7
2.3.3 Hazardous pumped media sprayed
out ............................................. 8
2.3.4 Moving parts .................................. 8
2.3.5 Hot surfaces .................................. 8
2.3.6 Magnetic field ................................. 8
3 Layout and Function ............................... 9
3.1 Marking ....................................... 9
3.1.1 Name plate ................................... 9
3.1.2 ATEX type plate .............................. 9
3.2 Description .................................... 10
3.3 Assembly ..................................... 10
3.4 Magnetic coupling ............................ 10
4 Transport, Storage and Disposal ................. 11
4.1 Transport ...................................... 11
4.1.1 Unpacking and inspection on delivery . . . . . . 11
4.1.2 Lifting .......................................... 11
4.2 Storage ....................................... 11
4.3 Disposal ....................................... 11
5 Installation and connection ....................... 12
5.1 Preparing for installation ..................... 12
5.1.1 Check operating conditions ................. 12
5.1.2 Preparing the installation site ............... 12
5.1.3 Surface preparation .......................... 12
5.2 Setting up ..................................... 12
5.3 Planning pipelines ............................ 12
5.3.1 Designing pipelines .......................... 12
5.3.2 Arranging the supports and connec-
tions ........................................... 12
5.3.3 Specifying nominal widths ................... 12
5.3.4 Specifying pipe lengths ...................... 13
5.3.5 Optimizing changes of cross section and
direction ....................................... 13
5.3.6 Providing safety and control devices
(recommended) .............................. 13
5.4 Connecting the pipes ........................ 13
5.4.1 Keeping the piping clean .................... 13
5.4.2 Installing suction pipe ........................ 13
5.4.3 Installing the pressure pipe .................. 13
5.4.4 Inspection for stress-free pipe
connections ................................... 13
5.5 Electrical connection ......................... 14
5.5.1 Connecting the motor ........................ 14
5.5.2 Check direction of rotation ................... 14
6Operation ............................................ 15
6.1 Preparing for commissioning ................ 15
6.1.1 Check downtimes ............................ 15
6.1.2 Filling and bleeding .......................... 15
6.1.3 Check direction of rotation ................... 15
6.2 Commissioning ............................... 15
6.2.1 Switching on .................................. 15
6.2.2 Switching off .................................. 15
6.3 Shutting down the pump ..................... 16
6.4 Restoring the pump to service .............. 16
6.5 Operating the stand-by pump ............... 16
7 Maintenance ......................................... 17
7.1 Inspections ................................... 17
7.2 Servicing ...................................... 17
7.2.1 Maintenance in accordance with maintenance
schedule ...................................... 17
7.2.2 Cleaning the pump ........................... 17
7.3 Dismounting .................................. 17
7.3.1 Preparations for dismounting ................ 17
7.3.2 Disassembling and checking the
pump .......................................... 18
7.4 Replacement parts and return .............. 19
7.5 Installing ...................................... 19
7.5.1 Preparations for installation ................. 19
7.5.2 Assembly of the pump ....................... 19
7.5.3 Install the pump into the system . . . .. .. . . . .. 20
8 Troubleshooting .................................... 21
9 Appendix ............................................. 24
9.1 Replacement parts ........................... 24
9.1.1 Part numbers and designations .. .. .. . .. .. .. 24
9.1.2 Drawings ...................................... 25
9.2 Technical specifications ...................... 27
9.2.1 Ambient conditions ........................... 27
9.2.2 Total pressure ................................ 27
9.2.3 Tightening torques ........................... 27
9.2.4 Flow rate ...................................... 27
9.2.5 Cleaning agents .............................. 27
9.3 Maintenance schedule ....................... 28
9.4 Declaration of conformity in accordance with
EC machinery directive ...................... 29
2NHM 12375/1222

Table of contents
List of figures
Fig. 1 Name plate (example) ....................... 9
Fig. 2 ATEX type plate (example) .................. 9
Fig. 3 NHM layout ................................... 10
Fig. 4 Attach the lifting gear to the modular pump
(illustration of general principle) ... . . . .. .. .. . 11
Fig. 5 Straight pipe lengths in front and after the
pumps (recommended) ...................... 13
Fig. 6 Components of the plain bearings .. . .. .. .. . 18
Fig. 7 Parts (sectional drawing) .................... 25
Fig. 8 Parts (exploded drawing) .................... 26
Fig. 9 Total pressure, pump head material
PP-CF ......................................... 27
Fig. 10 Total pressure, pump head material
PVDF .......................................... 27
List of tables
Tab. 1 Other application documents, purpose and
where found .................................. 4
Tab. 2 Warning signs and consequences if
disregarded ................................... 5
Tab. 3 Symbols and their meaning ................. 5
Tab.4 Measurestobetakenifthepumpisshut
down .......................................... 16
Tab. 5 Measures depending on the behavior of the
pumped liquid ................................ 16
Tab. 6 Fault/number assignment ................... 21
Tab. 7 Troubleshooting list .......................... 23
Tab. 8 Designation of components according to part
numbers. ...................................... 24
Tab. 9 Ambient conditions ........................... 27
Tab. 10 Tightening torques ........................... 27
Tab. 11 Flow rate ...................................... 27
Tab. 12 Maintenance schedule ....................... 28
12375/1222 NHM 3

About this document
1 About this document
This manual:
• is an integral part of the pump
• applies to all series referred to
• describes safe and proper operation during all operating
phases
1.1 Target groups
Operating company
• Responsibilities:
– Always keep this manual accessible where the device
is used on the system.
– Ensure that employees read and observe this docu-
ment, particularly the safety instructions and warnings,
and the documents which also apply.
– Observe any additional country-specific rules and reg-
ulations that relate to the system.
Qualified personnel, fitter
• Mechanics qualification:
– Qualified employees with additional training for fitting
therespectivepipework
• Electrical qualification:
– Qualified electrician
• Transport qualification:
– Qualified transport specialist
• Responsibility:
– Read, observe and follow this manual and the other
applicable documents, especially all safety instructions
and warnings.
1.2 Other applicable documents
Document/purpose Where found
The following documents are available
online:
• ATEX additional instructions
• Resistance lists
– Resistance of materials used
to chemicals
• Data sheet
– Technical specifications,
operating conditions,
dimensions
•www.schmitt-pumpen.de/en/
services/downloads
Spare parts list
• Ordering spare parts
Sectional drawing
• Sectional drawing, part numbers,
component designations
Documentation for the drive
• Technical documentation for drives
Documentation
included
Declaration of conformity
• Conformity with standards
•(→9.4 Declaration of conformity in accordance with
EC machinery directive, Page 29).
Tab. 1 Other application documents, purpose
and where found
4NHM 12375/1222

About this document
1.3 Warnings and symbols
Warning sign Level of risk Consequences if disregarded
DANGER immediate acute risk Death, serious bodily harm
potentially acute risk Death, serious bodily harm
CAUTION potentially hazardous situation Minor injury
NOTE potentially hazardous situation Material damage
Tab. 2 Warning signs and consequences if disregarded
Symbol Meaning
Safety warning sign
Take note of all information highlighted by the safety warning sign
and follow the instructions to avoid injury or death.
Instruction
1., 2., ... Multiple-step instructions
Precondition
→Cross reference
Information, notes
Tab. 3 Symbols and their meaning
12375/1222 NHM 5

General safety instructions
2 General safety instructions
The manufacturer accepts no liability for damages caused
by disregarding any of the documentation.
2.1 Intended use
• Only use the pump with suitable media. Pump parts in con-
tact with media must be resistant to the media. (→Order
specification).
• Use the pump for flammable or explosive media only if it
is intended for use in potentially explosive atmospheres
(→ATEX additional instructions).
• Adhere to the operating limits and size-dependent mini-
mum flow rates.
• Avoid dry running:
Initial damage, such as destruction of plain bearings, seals
and plastic parts, will occur within a few seconds.
– Make sure the pump is only operated only when filled
with the conveyed fluid and vented, and never operated
when not filled with the pumped liquid.
– Ensure that there are no excessively high amounts of
gas in the pumping medium.
– Ensure that the pump is operated only within the per-
missible operating range.
– Ensure that the use of shut-off valves or filters does not
cause the pressure on the inlet side of the pump to be
too low.
• Avoid cavitation:
– Open the suction-side fitting and do not use it to regu-
late the flow.
– Do not open the pressure-side fitting beyond the
agreed operating point.
• Avoid overheating:
– Do not operate the pump while the pressure-side fitting
is closed.
– Note minimum flow (→Data sheet).
• Avoid damage to the motor:
– Do not open the pressure-side fitting beyond the
agreed operating point.
– Note the maximum permissible number of times the
motor can be switched on per hour (→manufacturer's
specifications).
• Consult with the manufacturer regarding any other use of
the device.
Prevention of obvious misuse (examples)
• Observe pump limits of use regarding temperature, pres-
sure, flow and speed (→data sheet).
• The power consumption of the pump increases as the spe-
cific gravity of the pumped fluid increases. Adhere to the
permissible specific gravity in order to eliminate the pos-
sibility that the pump, coupling and motor become over-
loaded (→data sheet).
A lower specific gravity is permissible. Adapt the auxiliary
systems accordingly.
• When conveying fluids containing solids, observe the limit
values for proportions of solid particles and particle size:
– ParticlesizeØ≤0.5 mm
– Proportion of solid particles ≤5%Vol.
• If plain bearings of carbon-bonded silicon carbide are fitted,
do not pump any liquids containing solids.
• The type of installation should be selected only in accor-
dance with these operating instructions. For example, the
following are not allowed:
– Hanging pumps in the pipe
– Overhead installation
– Installation in the immediate vicinity of extreme heat or
cold sources
– Installation too close to a wall
– Vertical installation
2.2 General safety instructions
Observe the following regulations before carrying out any
work.
2.2.1 Product safety
The pump has been built according to state-of-the-art technol-
ogy and the recognized technical safety regulations. Never-
theless, operation of the pump can still put the life and health
of the user or third parties at risk or damage the pump or other
property.
• Operate the pump only if it is in perfect technical condition
and use it only as intended, staying aware of safety and
risks, and in adherence to the instructions in this manual.
• Keep this manual and all other applicable documents com-
plete, legible and accessible to personnel at all times.
• Refrain from any procedures and actions that would pose
a risk to personnel or third parties.
• In the event of any safety-relevant faults, shut down the
pump immediately and have the fault corrected by appro-
priate personnel.
• In addition to the entire documentation for the product,
comply with statutory or other safety and accident-preven-
tion regulations and the applicable standards and guide-
lines in the country where the pump is operated.
6NHM 12375/1222

General safety instructions
2.2.2 Obligations of the operating company
Safety-conscious working
• Operate the pump only if it is in perfect technical condition
and use it only as intended, staying aware of safety and
risks, and in adherence to the instructions in this manual.
• Ensure that the following safety aspects are observed and
monitored:
– Intended use
– Statutory or other safety and accident-prevention reg-
ulations
– Safety regulations governing the handling of haz-
ardous substances
– Applicable standards and guidelines in the country
where the pump is operated
– Applicable guidelines of the operator
• Make personal protective equipment available.
Qualified personnel
• Make sure all personnel tasked with work on the pump
have read and understood this manual and all other appli-
cable 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 trainee personnel only work on the pump
under supervision of specialist technicians.
• All activities may be carried out only by specialists who hold
the required qualifications:
Actions Required qualified
personnel
Mechanical work
(installation, maintenance,
servicing)
Skilled mechanic
Electrical work
(electrical installation)
Qualified electrician
All further work Instruction by the
user/owner
Safety equipment
• Provide the following safety equipment and verify its func-
tionality:
– For hot, cold and moving parts: pump safety guarding
provided by the customer
– For pumps without capability to run dry: Dry run pro-
tection
Warranty
• Obtain the manufacturer's approval prior to carrying out
any modifications, repairs or alterations during the warranty
period.
• Only use genuine parts or parts that have been approved
by the manufacturer.
2.2.3 Obligations of personnel
• All directions given on the pump must be followed (and kept
legible), e.g. the arrow indicating the sense of rotation and
the markings for fluid connections.
• Pump, coupling guard and components:
– Do not step on them or use 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 sup-
ports
– Do not use them for storing paper or similar materials
• Do not remove the safety guarding for hot, cold or moving
parts during operation.
• If necessary, use protective equipment for the specific
application:
–Helmet
– Safety gloves
– Safety goggles
–Gloves
– Further protective equipment depending on the
medium being pumped
• Only carry out work on the pump while it is not running.
• Before all installation and maintenance work, disconnect
the motor from the mains and secure it against being
switched back on again.
• Never reach into the suction or discharge flange.
• Following all work on the pump, refit safety devices in
accordance with the instructions and bring into service.
• Do not make any modifications to the device.
2.3 Specific hazards
2.3.1 Potentially explosive atmospheres
Observe ATEX additional manual
• Additional instructions for use in explosive atmospheres
•(→www.schmitt-pumpen.de/sites/default/files/2020-10/
ATEX-Zusatzanleitung-en.pdf)
2.3.2 Electric shock
In the event of contact with live parts (e.g. wires in the termi-
nal box of the electric motor), there is a risk of electric shock
resulting in serious injury or death.
• All electrical work must be carried out by qualified electri-
cians only.
• Before all work on the electrical system, disconnect the
motor from the mains and secure against being switched
back on again.
12375/1222 NHM 7

General safety instructions
2.3.3 Hazardous pumped media sprayed out
Pumped media can be toxic and hot and can be sprayed out.
In the event of contact, there is a risk of burns and skin rashes.
• When handling hazardous fluids (e.g. hot, flammable,
explosive, toxic, hazardous to health or the environment),
observe the safety regulations for the handling of haz-
ardous substances.
• Allow the pump to cool completely before commencing any
work and then depressurize it.
• Use protective equipment for any work on the pump.
• Empty the pump during maintenance and repair work.
• Safely collect the fluid and dispose of it in accordance with
environmental regulations.
2.3.4 Moving parts
Moving parts (e.g. shaft, impeller, coupling) present a risk of
fatal injury due to being dragged in, crushed or trapped.
• Do not touch the pump when it is running.
• Do not carry out any work on the pump when it is running.
• Maintain an adequate distance from moving parts.
• When performing installation and maintenance work, dis-
connect the motor from the mains and secure it against
being switched back on again.
• (If present) ensure contact guard is fitted after work on the
pump.
2.3.5 Hot surfaces
During operation, high temperatures are generated on the sur-
faces of the housing. Even after switching off, the surfaces
of the housing can still be hot and can cool down only slowly.
There is a risk of burns when touching hot surfaces.
• Do not touch the pump when it is running.
• Allow the pump to cool completely before commencing any
work.
• Wear protective gloves.
2.3.6 Magnetic field
The magnetic field of the magnetic coupling can destroy prod-
ucts and devices that are sensitive to magnets. These include
electronic implants (such as pacemakers), digital watches, cal-
culators, hard drives, credit cards and ID cards. For persons
with electronic implants there is a danger to life.
• Do not allow persons with electronic implants to work on
the pump or on magnetic parts.
• Secure the work place and if necessary cordon off:
– Ensure that persons with electronic implants maintain
a safe distance > 1 m
– Make sure that no magnetizable metal partsare
attracted by the pump's magnetic coupling.
– Make sure that parts of the magnetic coupling are not
attracted by the magnetizable metal parts
• Keep magnetizable objects a safe distance > of 150 mm
away from the magnetic coupling.
8NHM 12375/1222

Layout and Function
3 Layout and Function
3.1 Marking
3.1.1 Name plate
Artike
l Nr./item no.:
l Nr./item no.:
Serien Nr./serial no.:
Serien Nr./serial no.:
Typ/type:
Typ/type:
Prod.-Datum/mfg. date:
Prod.-Datum/mfg. date:
SCHMITT Kreiselpumpen GmbH & Co. KG
SCHMITT Kreiselpumpen GmbH & Co. KG
D-76275 Ettlingen, Germany
D-76275 Ettlingen, Germany
1234567
1234567
123456_78_910
123456_78_910
NHM 200 PP EPDM d135
NHM 200 PP EPDM d135
SIC/SIC 2,2kW
SIC/SIC 2,2kW
07/2022
07/2022
1
2
3
5
4
11
10
9
678
Fig. 1 Name plate (example)
1 Article numbers
2 Serial number
3Type
4Pumpseries
5 Year of manufacture (month/year)
6Size
7 Plain bearing material
8 Rated power of motor
9 Pump head material
10 Impeller diameter [mm]
11 Housing seal material
3.1.2 ATEX type plate
Artike
l Nr./item no.:
l Nr./item no.:
Serien Nr./serial no.:
Serien Nr./serial no.:
Typ/type:
Typ/type:
Prod.-Datum/mfg. date:
Prod.-Datum/mfg. date:
SCHMITT Kreiselpumpen GmbH & Co. KG
SCHMITT Kreiselpumpen GmbH & Co. KG
D-76275 Ettlingen, Germany
D-76275 Ettlingen, Germany
1234567
1234567
123456_78_910
123456_78_910
NHM 200 PP EPDM d135
NHM 200 PP EPDM d135
SIC/SIC 2,2kW
SIC/SIC 2,2kW
07/2022
07/2022
II 3G Ex H IIB T3
II 3G Ex H IIB T3
5
Fig. 2 ATEX type plate (example)
1 Explosion protection label
12375/1222 NHM 9

Layout and Function
3.2 Description
Non self-priming and magnetically coupled centrifugal pump in
modular design:
• Media-lubricated plain bearings
• Horizontal installation
• Direction of conveying
– Suction flange, axial
– Discharge flange, vertical
3.3 Assembly
12 3 4 5 7
10
8
6
9
Fig. 3 NHM layout
1 Suction branch
2 Housing
3 Discharge flange
4 Rear cover
5Lantern
6 Magnetic coupling (hidden)
7 Terminal box
8 Motor
9 Motor foot
10 Base plate
3.4 Magnetic coupling
Pumps with magnetic couplings are hermetically sealed and
leaktight. Power transmission from the motor is non-contact
through an enclosed and hermetically sealed rear cover on the
impeller.
10 NHM 12375/1222

Transport, Storage and Disposal
4 Transport, Storage and
Disposal
4.1 Transport
The user/owner is responsible for the transport of the
pump.
Weight specification (→Data sheet)
4.1.1 Unpacking and inspection on delivery
1. Unpack the pump/machine drive on delivery, and inspect it
for transport damage.
2. Check completeness and accuracy of delivery.
3. Ensure that the information on the name plate agrees with
the order/design data.
4. Report any transportation damage to the manufacturer
immediately.
5. Dispose of packaging material according to local regula-
tions.
4.1.2 Lifting
DANGER
Death or limbs crushed as a result transported items
falling over!
Use lifting gear appropriate for the total weight to be trans-
ported.
Attach lifting gear in accordance with the following diagram.
Do not stand under suspended loads.
Fig. 4 Attach the lifting gear to the modular pump
(illustration of general principle)
1. Attach lifting gear in accordance with the above diagram.
2. Lift the modular pump appropriately.
4.2 Storage
NOTE
Material damage due to inappropriate storage!
Store the pump properly.
1. Seal all openings with blind plugs or plastic covers.
2. Make sure the storage room meets the following condi-
tions:
–Dry
– Frost-free
– Vibration-free
–UVprotected
3. Rotatethepumpshafttwiceamonth.
4. Make sure the shaft and bearing change their rotational
position in the process.
4.3 Disposal
Plastic parts can be contaminated by poisonous or radioac-
tive pumped liquids to such an extent that cleaning will be
insufficient.
WARNING
Risk of poisoning and environmental damage by the
pumped liquid!
Use personal protective equipment when carrying out any
work on the pump.
Prior to the disposal of the pump:
– Collect and damage any escaping pumped liquid in
accordance with local regulations.
– Neutralize residues of pumped liquid in the pump.
Remove plastic parts and damage them in accordance with
local regulations.
Dispose of the pump in accordance with local regulations.
12375/1222 NHM 11

Installation and connection
5 Installation and connection
For pumps in potentially explosive atmospheres (→ATEX
additional manual).
NOTE
Material damage caused by dirt!
Do not remove the transport seals until immediately before
installing the pump.
Do not remove any covers or transport and sealing covers
until immediately before connecting the pipes to the pump.
5.1 Preparing for installation
5.1.1 Check operating conditions
Ensure the required operating conditions are met:
– Resistance of body and seal material to the medium
(→resistance lists).
– Required ambient conditions
(→9.2.1 Ambient conditions, Page 27).
5.1.2 Preparing the installation site
Ensure the installation site meets the following conditions:
– Pump is freely accessible from all sides
– Sufficient space for the installation/removal of the pipes
and for maintenance and repair work, especially for the
removal and installation of the pump
– Pump not exposed to external vibration (damage to
bearings)
– Pump not exposed to external corrosive influences
– Frost protection
5.1.3 Surface preparation
Aids, tools, materials:
– Spirit level
Make sure the surface meets the following conditions:
– Level and horizontal
– Clean (no oil, dust or other impurities)
– Capable of bearing the weight of the machine drive and
all operating forces
– Ensures the stability of the machine drive
5.2 Setting up
1. For motor sizes 90 and 100, mount the corresponding base
plate on the motor foot. If the pump head is not available
attheinstallationsite,thebaseplateisop
tional.
2. Lift up the machine drive (→4.1 Transport, Page 11).
3. Put down the machine drive at the place of installation.
4. Screw the attachment bolts into the motor foot and tighten
them.
5.3 Planning pipelines
Water hammer may damage the pump or the system. Plan
the pipes and fittings as far as possible to prevent water
hammer occurring.
5.3.1 Designing pipelines
Plan pipes safely:
– No pulling or thrusting forces
– No bending moments
– Adjust for changes in length due to temperature
changes (compensators, expansion shanks)
– Avoid bends close to the suction flange
5.3.2 Arranging the supports and connections
NOTE
Material damage due to excessive forces and torques on
the pump!
Ensure pipe connection without stress.
1. Support pipes in front of the pump.
2. Ensure the pipe supports will always allow expansion and
contraction of the pipes.
5.3.3 Specifying nominal widths
Keep the flow resistance in the pipes as low as possible.
1. Make sure the nominal suction line width is not smaller than
the nominal suction flange width.
2. Make sure the nominal pressure line width is not smaller
than the nominal discharge flange width.
12 NHM 12375/1222

Installation and connection
5.3.4 Specifying pipe lengths
C
D
B
A
Fig. 5 Straight pipe lengths in front and after the
pumps (recommended)
A>5xDNs
BDNs
CDNd
D>5xDNd
Observe recommended minimum values when installing
the pump.
Suction side: Shorter lengths are possible, but may limit
hydraulic performance data.
Pressure side: Shorter lengths are possible, but may result
in increased noise development.
5.3.5 Optimizing changes of cross section and
direction
1. Avoid radii of curvature of less than 1.5 times the nominal
pipe diameter.
2. Avoid abrupt changes of cross-section along the piping.
5.3.6 Providing safety and control devices
(recommended)
Avoid contamination
1. Install a dirt strainer with mesh size < 3 mm in the suction
pipe.
2. Install a differential pressure gauge with contact manome-
ter to monitor contamination.
Avoid reverse running
1. Install a non-return valve between the discharge flange and
stop valve, to ensure that the medium does not flow back
after the pump is switched off.
2. In order to enable venting, include vent connection
between discharge flanges and non-return valve.
Make provisions for isolating and shutting off the pipes
For maintenance and repair work.
Provide shut-off devices in the suction pipe and pressure
line.
Dry run protection by measuring the operating conditions
Provide monitoring sensors for both pressure and flow rate,
to protect the pump against dry running and consequential
damage.
5.4 Connecting the pipes
NOTE
Material damage due to excessive forces and torques on
the pump!
Ensure pipe connection without stress.
5.4.1 Keeping the piping clean
NOTE
Material damage due to impurities in the pump!
Make sure no impurities can enter the pump.
Clean all piping parts and fittings prior to assembly.
5.4.2 Installing suction pipe
1. Remove the transport and sealing covers from the pump.
2. Fit suction pipe stress-free and sealed.
5.4.3 Installing the pressure pipe
1. Remove the transport and sealing covers from the pump.
2. Position the pressure flange facing upwards, so as to allow
the pump head to be vented.
3. Fit the pressure line stress-free and sealed.
5.4.4 Inspection for stress-free pipe connections
Piping installed and cooled down
1. Disconnect the pipe connections from the pump.
2. Check whether the pipes can be moved freely in all direc-
tions within the expected range of expansion.
3. Make sure that the connections are parallel.
4. Reconnect the pipe connections to the pump.
12375/1222 NHM 13

Installation and connection
5.5 Electrical connection
DANGER
Risk of electrocution!
All electrical work must be carried out by qualified electri-
cians only.
Before all work on the electrical system, disconnect the
motor from the mains and secure against being switched
back on again.
5.5.1 Connecting the motor
Follow the instructions of the motor manufacturer.
1. Connect the motor according to the connection diagram.
2. Make sure no danger arises due to electric power.
3. Install an EMERGENCY STOP switch.
5.5.2 Check direction of rotation
Only possible when starting up (→6.2 Commissioning,
Page 15).
14 NHM 12375/1222

Operation
6 Operation
For pumps in potentially explosive atmospheres (→ATEX
additional manual).
6.1 Preparing for commissioning
6.1.1 Check downtimes
Before starting up the pump, check the downtime and per-
form the following actions:
– Check the fill level.
– If the hydraulic parts are dirty, clean them.
– Check that the impeller runs freely.
6.1.2 Filling and bleeding
1. Open the suction-side fitting.
2. Open the pressure-side fitting.
3. Fill pump and suction pipe with fluid.
4. Verify that no pipe connections are leaking.
6.1.3 Check direction of rotation
NOTE
Material damage as a result of dry running!
Make sure the pump is filled properly.
1. Switch on motor for max. 2 seconds and switch it off again
immediately.
2. Visually check the direction of rotation of the motor fan
impeller and make sure that the direction of rotation of the
motor matches the direction arrow on the pump casing.
3. If the sense of rotation is different: Change over the two
phases (→5.5 Electrical connection, Page 14).
6.2 Commissioning
The pump achieves its final rated capacity only after a certain
running-in period.
6.2.1 Switching on
Pump set up and connected properly
Motor set up and connected properly
All connections stress-free and sealed
All safety equipment installed and tested for functionality
Pump prepared, filled and vented correctly
NOTE
Risk of cavitation if suction flow is restricted!
Open the suction-side fitting and do not use it to regulate
the flow.
Do not open the pressure-side fitting beyond the operating
point.
NOTE
Material damage due to overheating!
Do not operate the pump for long periods with the pressure-
side fitting closed.
Observe the minimum flow rate (→9.2.4 Flow rate,
Page 27).
NOTE
Material damage as a result of dry running!
Make sure the pump is filled properly.
1. Open the suction-side fitting.
2. Close the pressure-side fitting.
3. Switch on the motor and check it for smooth running.
4. Once the motor has reached its nominal speed, open
the pressure-side fitting slowly until the operating point is
reached.
5. Make sure temperature change is smaller than 5 K/min for
pumps with hot fluids.
6. After the initial stress due to the pressure and operating
temperature, check that the pump is not leaking.
7. If leaks are present at the casing seals or connection
flanges, proceed as follows:
–Switchoffmotor.
– Close the control valves.
– Remedy the leaks.
6.2.2 Switching off
Pressure-side fitting closed (recommended)
1. Switch off motor.
2. Check all connecting bolts and tighten them if necessary
(only after initial commissioning).
12375/1222 NHM 15

Operation
6.3 Shutting down the pump
Take the following measures whenever the pump is shut
down:
Pump is Measure
shut down Take measures appropriate for
the fluid (→Tab. 5 Measures
depending on the behavior of
the pumped liquid, Page 16).
…emptied Close suction and pressure-side
fitting.
…dismounted Isolate the motor from its power
supply and secure it against
unauthorized switch-on.
…put into
storage
Note measures for storage
(→4.2 Storage, Page 11).
Tab. 4 Measures to be taken if the pump is shut down
Duration of shutdown (depending
on process)
Behavior of the
pumped liquid
Short Long
Crystallized or
polymerized,
solids
sedimenting
Flush the
pump.
Flush the
pump.
Solidifying/
freezing,
non-corrosive
Heat up or
empty the
pump and
containers.
Empty the
pump and
containers.
Solidifying/
freezing,
corrosive
Heat up or
empty the
pump and
containers.
Empty the
pump and
containers.
Remains liquid,
non-corrosive
––
Remains liquid,
corrosive
–Empty the
pump and
containers.
Tab. 5 Measures depending on the behavior
of the pumped liquid
6.4 Restoring the pump to service
Complete all steps as for commissioning
(→6.2 Commissioning, Page 15).
6.5 Operating the stand-by pump
Stand-by pump filled and bled
Operate the stand-by pump at least once a week.
1. Fully open the suction-side fitting.
2. Open pressure-side fitting far enough so that the stand-by
pump operating temperature is achieved and heating is
even (→6.2.1 Switching on, Page 15).
16 NHM 12375/1222

Maintenance
7 Maintenance
Opening the pump casing invalidates the warranty.
When used for the intended purpose the bearings and seals are
virtually free of wear and will not require replacement during the
warranty period.
Maintenance and repair work should be undertaken in consul-
tation with Schmitt. The chapter describes maintenance not
within the warranty period.
For pumps in potentially explosive atmospheres (→ATEX
additional manual).
Maintenance during the warranty period will be performed
by Schmitt. Submit evidence of conveyed medium on
request (DIN safety data sheet or confirmation of decon-
tamination).
7.1 Inspections
The inspection intervals depend on the operational strain
on the pump.
1. Check at appropriate intervals:
– Adherence to the minimum flow rate
– Normal operating conditions unchanged
2. For trouble-free operation, always ensure the following:
– No dry running
–Noleaks
– No cavitation
– Suction side open gate valves
– Free and clean filters
– Sufficient pump inlet pressure
– No unusual running noises or vibrations
– No parting of magnetic coupling
7.2 Servicing
Plain bearings are subject to natural wear and tear which
is heavily dependent on the respective operating condi-
tions. It is therefore not possible to make general state-
ments about the operating life.
Inspection and replacement of the plain bearings
is performed when the pump is disassembled
(→7.3.2 Disassembling and checking the pump,
Page 18).
7.2.1 Maintenance in accordance with main-
tenance schedule
Perform maintenance work in accordance with the mainte-
nance schedule (→9.3 Maintenance schedule, Page 28).
7.2.2 Cleaning the pump
NOTE
High water pressure or spray water can cause material
damage!
Do not direct a water jet or steam jet into the opening of the
lantern.
Regularly clean the pump to remove heavy dirt.
7.3 Dismounting
WARNING
Risk of injury due to heavy components!
Pay attention to the component weight. Lift and transport
heavy components using suitable lifting gear.
Set down components safely and secure them against
overturning or rolling away.
WARNING
Risk of injury during disassembly!
Secure the pressure-side shut-off valve against accidental
opening.
Wear protective gloves, components can become very
sharp-edged due to wear or damage.
Observe the manufacturer's specifications (e.g. for the
motor).
NOTE
Material damage due to incorrect dismounting/installation
of the pump!
Only specialist mechanics should complete dismounting/
installation work.
7.3.1 Preparations for dismounting
Pump is depressurized
Pump completely empty, flushed and decontaminated
Electrical connections disconnected and motor secured
against switch-on
Pump cooled down
Pressure gauge lines, pressure gauge and fixtures dis-
mounted
1. Dismantle the pipes on the suction and pressure side.
2. Remove pump from the system.
3. When dismounting, observe the following:
– Mark the precise orientation and position of all compo-
nents before dismounting them.
– Dismount components concentrically without canting.
12375/1222 NHM 17

Maintenance
7.3.2 Disassembling and checking the pump
Following the drawings for disassembly (→9.1.2 Drawin-
gs, Page 25).
Request spare parts from the manufacturer
(→7.4 Replacement parts and return, Page 19).
During disassembly, stressed parts are checked for damage
and replaced if necessary:
• Bearing ring (02-1) on the housing (02)
• Seal (06) and O-rings (01, 03)
• Impeller (04) with angle ring (04-1)
• Bearing sleeve (05-1) on the magnet assembly (05)
• Bearing bush (07-1) on the rear cover (07)
The plain bearings consist of the following parts:
04-1 02-105-107-1
Fig. 6 Components of the plain bearings
02-1 Bearing ring
04-1 Angle ring
05-1 Bearing sleeve
07-1 Bearing bush
Prepared for disassembly.
NOTE
Material damage, fragile components!
Perform disassembly carefully, and do not strike or knock
the fragile parts of the plain bearing.
Disassembling and checking stressed parts
1. Remove the hexagon nuts and washers from the hex-head
bolts (14).
2. Remove the hex-head bolts (14) from the housing (02).
3. Remove the housing (02) from the rear cover (07).
4. Check the bearing ring (02-1) for damage and if necessary
replace the complete housing (02).
5. Remove O-ring (01) from suction branch, check it for dam-
age and change it if necessary.
6. Remove O-ring (03) from discharge flange, check it for
damage and change it if necessary.
7. Remove the housing seal (06) from the rear cover (07),
check it for damage and change it if necessary.
8. Pull the rear cover (07) together with the impeller (04) and
magnet assembly (05) off the magnet bell (08).
9. Pull the impeller (04) together with the magnet assembly
(05) off the rear cover (07).
10. Pull the impeller (04) off the magnet assembly (05).
11. Check impeller (04) and angle ring (04-1) for damage and
replace the complete impeller (04) if necessary.
12. If the impeller (04) is undamaged, check it for dirt and clean
it if necessary.
13. Check the bearing sleeve (05-1) for damage and if neces-
sary replace the complete magnet assembly (05).
14. Check the bearing sleeve (07-1) for damage and, if neces-
sary, replace the complete rear cover (07).
15. If no further disassembly is required, assemble the pump
(→7.5.2 Assembly of the pump, Page 19).
Dismantling the magnet bell, lantern and motor
16. If necessary, turn the motor (10) and lantern (09) to a suit-
able position to allow access for dismantling the magnet
bell (08).
17. Turn the magnet bell (08) until the grub screw (13) at the
opening of the lantern can be removed.
18. Unscrew the grub screw (13) from the magnet bell (08).
19. Pull the magnet bell (08) off the motor shaft.
20. Remove the hexagon socket screws (12) from the lantern
(09).
21. Remove the lantern (09) from the motor (10).
22. Remove the base plate (11) from the motor (10), if present.
23. Check that the through holes and relief holes are not
blocked - if they are, clean them.
18 NHM 12375/1222

Maintenance
7.4 Replacement parts and return
1. Have the following information as shown on the name plate
ready to hand when ordering spare parts (→3.1 Marking,
Page 9).
– Article numbers
–Type
– Year of manufacture
2. Please complete and enclose the confirmation of decon-
tamination for returns
(→www.schmitt-pumpen.de/sites/default/files/2020-10/
Dekontaminationsnachweis_en.pdf).
3. Use only spare parts from SCHMITT
(E-Mail: [email protected]).
7.5 Installing
WARNING
Risk of injury due to heavy components!
Pay attention to the component weight. Lift and transport
heavy components using suitable lifting gear.
Set down components safely and secure them against
overturning or rolling away.
WARNING
Risk of injury during assembly!
Observe the manufacturer's specifications (e.g. for the
motor).
NOTE
Material damage due to incorrect dismounting/installation
of the pump!
Only specialist mechanics should complete dismounting/
installation work.
NOTE
Material damage due to unsuitable components!
Always replace lost or damaged screws with screws of the
same strength where required.
Only replace seals with seals of the same material.
NOTE
Material damage, fragile components!
Perform installation carefully, and do not strike or knock the
fragile parts of the plain bearing.
7.5.1 Preparations for installation
When installing please observe:
– Replace worn parts with genuine spare parts.
– Replace seals, inserting them in such a way that they
are unable to rotate.
– Do not apply synthetic or mineral oil, grease or cleaning
agents to elastomer components.
– Install components concentrically and without tilting in
accordance with the markings applied.
7.5.2 Assembly of the pump
Following the drawings for assembly (→9.1.2 Drawings,
Page 25).
If only the stressed parts were disassembled and tested,
steps 5...10 can be omitted.
Prepared for installation
Preparing the impeller for installation
The impeller, magnet assembly, housing seal and rear cover
are assembled as a complete unit, so as to avoid material dam-
age during subsequent installation operations.
1. Mount the impeller (04) on the magnet assembly (05).
2. Insert the impeller (04) with magnet assembly (05) into the
rear cover (07).
3. Insert the housing seal (06) into the groove on the des rear
cover (07).
4. Put the unit (04...07) aside in a safe place.
Installing the pump
5. Align the lantern (09) with the opening in the motor foot.
6. Using the hexagon socket screws (12), attach the
lantern (09) to the motor (10). When doing so, tighten the
hexagon socket screws (12) across diagonals and to the
correct torque (→9.2.3 Tightening torques, Page 27).
7. If necessary, turn the motor (10) and lantern (09) to a suit-
able position in order to be able to mount the magnet bell
(08) smoothly.
8. Rotate the motor shaft until the Woodruff key is aligned with
the opening.
9. Align the magnet bell (08) with the tapped hole for the
Woodruff key and slide it on to the motor shaft. Align the
magnet bell parallel to the shaft end.
10. Screw in the grub screw (13) and fix the magnet bell (08).
Observe the correct torque (→9.2.3 Tightening torques,
Page 27).
12375/1222 NHM 19

Maintenance
WARNING
Strong magnetic field!
Hands can be crushed when mounting the magnetic cou-
pling.
Carefully insert the unit (04...07) into the magnet bell
(08).
Use sturdy gloves.
11. Carefully insert the unit (04...07) into the magnet bell (08).
12. Assemble the housing (02) on to the rear cover (07) and
the impeller (04).
13. Using hexagon head screws (14), washers and hexagon
nuts, screw the housing (02) to the rear cover (07) and
lantern (09). When doing so, tighten the nuts across diago-
nals and to the correct torque (→9.2.3 Tightening torques,
Page 27).
14. Fit the O-ring (01) onto the suction branch.
15. Fit the O-ring (03) onto the discharge flange.
16. Mount the base plate (11) on the motor (10) if necessary.
17. Spin the motor fan impeller and make sure that the
impeller (04) runs freely in the plain bearings.
7.5.3 Install the pump into the system
Install the pump in the system (→5 Disposal, Page 12).
20 NHM 12375/1222