KSB Amarex KRT Installation instructions

Submersible Motor Pump
Amarex KRT
Dry Installation
60 Hz
Installation/Operating Manual
Mat. No.: 01214916

Legal information/Copyright
Installation/Operating Manual Amarex KRT
Original operating manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced, edited or
processed for any other purpose, nor otherwise transmitted, published or made available to a third party without
the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB Aktiengesellschaft, Frankenthal 10.03.2016

Contents
Glossary ......................................................................................................................................... 5
1 General .......................................................................................................................................... 6
1.1 Principles .........................................................................................................................................................6
1.2 Installation of partly completed machinery ..................................................................................................6
1.3 Target group ...................................................................................................................................................6
1.4 Other applicable documents ..........................................................................................................................6
1.5 Symbols ...........................................................................................................................................................7
2 Safety ............................................................................................................................................. 8
2.1 Key to safety symbols/markings .....................................................................................................................8
2.2 General ............................................................................................................................................................8
2.3 Intended use ...................................................................................................................................................8
2.4 Personnel qualification and training ...........................................................................................................10
2.5 Consequences and risks caused by non-compliance with these operating instructions ..........................10
2.6 Safety awareness ..........................................................................................................................................10
2.7 Safety information for the operator/user ...................................................................................................10
2.8 Safety information for maintenance, inspection and installation work ...................................................11
2.9 Unauthorized modes of operation ..............................................................................................................11
2.10 Explosion protection ....................................................................................................................................11
3 Transport/Temporary Storage/Disposal ..................................................................................... 12
3.1 Transport .......................................................................................................................................................12
3.2 Storage/Preservation ....................................................................................................................................12
3.3 Return to supplier .........................................................................................................................................13
3.4 Disposal .........................................................................................................................................................14
4 Description of the Pump (Set) .................................................................................................... 15
4.1 General description ......................................................................................................................................15
4.2 Designation ...................................................................................................................................................15
4.3 Name plate ....................................................................................................................................................15
4.4 Design details ................................................................................................................................................15
4.5 Types of installation .....................................................................................................................................16
4.6 Configuration and function .........................................................................................................................17
4.7 Noise characteristics .....................................................................................................................................18
4.8 Scope of supply .............................................................................................................................................18
4.9 Dimensions and weights ..............................................................................................................................18
5 Installation at Site ....................................................................................................................... 19
5.1 Safety regulations .........................................................................................................................................19
5.2 Checks to be carried out prior to installation .............................................................................................19
5.3 Checking the lubricant level ........................................................................................................................19
5.4 Checking the direction of rotation ..............................................................................................................20
Contents
Amarex KRT 3 of 58

5.5 Installing the pump set ................................................................................................................................20
5.6 Piping ............................................................................................................................................................22
5.7 Auxiliary connections ...................................................................................................................................24
5.8 Electrical system ............................................................................................................................................25
5.9 Priming and venting the pump ...................................................................................................................28
6 Commissioning/Start-up/Shutdown ........................................................................................... 29
6.1 Commissioning/start-up ...............................................................................................................................29
6.2 Operating limits ............................................................................................................................................30
6.3 Shutdown/storage/preservation ..................................................................................................................32
6.4 Returning to service after storage ...............................................................................................................32
7 Servicing/Maintenance ............................................................................................................... 34
7.1 Safety regulations .........................................................................................................................................34
7.2 Maintenance/inspection ...............................................................................................................................34
7.3 Drainage/disposal .........................................................................................................................................40
7.4 Dismantling the pump set ............................................................................................................................40
7.5 Reassembling the pump set .........................................................................................................................43
7.6 Tightening torques .......................................................................................................................................47
7.7 Spare parts stock ...........................................................................................................................................47
8 Trouble-shooting ........................................................................................................................ 49
9 Related Documents .................................................................................................................... 50
9.1 General assembly drawing ...........................................................................................................................50
9.2 Wiring diagram .............................................................................................................................................54
9.3 Flamepaths on explosion-proof motors .....................................................................................................55
9.4 Sectional drawings of the mechanical seal .................................................................................................55
10 Certificate of Decontamination ................................................................................................. 56
Index ............................................................................................................................................ 57
Contents
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Glossary
Back pull-out unit
Pump without pump casing; partly completed
machinery
Certificate of decontamination
A certificate of decontamination certifies that
the pump (set) has been properly drained to
eliminate any environmental and health
hazards arising from components in contact
with the fluid handled.
Close-coupled design
Motor directly fitted to the pump via a flange
or a drive lantern
Discharge line
The line which is connected to the discharge
nozzle
Hydraulic system
The part of the pump in which the kinetic
energy is converted into pressure energy
Suction lift line/suction head line
The line which is connected to the suction
nozzle
Glossary
Amarex KRT 5 of 58

1 General
1.1 Principles
This manual is supplied as an integral part of the type series and variants indicated
on the front cover (for details, please refer to the table below).
Table 1: Variants covered by this manual
Sizes Impeller types Material variant
Cast iron
G G1 G2 GH
80-250 F F F F F
80-251 E E - - -
80-315 D D D - -
100-250 F F F F F
100-251 E, D, K E, D, K D, K - -
100-315 D D D - -
150-251 D D D - -
150-315 D, E, F, K D, E, F, K D, F, K F F, K
200-316 K K K - K
The manual describes the proper and safe use of this equipment in all phases of
operation.
The name plate indicates the type series and size, the main operating data, the order
number and the order item number. The order number and order item number
clearly identify the pump set and serve as identification for all further business
processes.
In the event of damage, immediately contact your nearest KSB service center to
maintain the right to claim warranty.
1.2 Installation of partly completed machinery
To install partly completed machinery supplied by KSB, refer to the sub-sections
under Servicing/Maintenance.
1.3 Target group
This operating manual is aimed at the target group of trained and qualified specialist
technical personnel. (⇨ Section 2.4 Page 10)
1.4 Other applicable documents
Table 2: Overview of other applicable documents
Document Contents
Data sheet Description of the technical data of the pump
set
General arrangement drawing/
outline drawing
Description of mating and installation
dimensions for the pump set
Hydraulic characteristic curve Characteristic curves showing head, flow rate,
efficiency and power input
General assembly drawing1) Sectional drawing of the pump set
Sub-supplier product literature1) Operating manuals and other product
literature of accessories and integrated
machinery components
Spare parts lists1) Description of spare parts
Supplementary operating manuals1) For example for special accessories
1) If agreed to be included in the scope of supply
1 General
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1.5 Symbols
Table 3: Symbols used in this manual
Symbol Description
✓Conditions which need to be fulfilled before proceeding with the
step-by-step instructions
⊳Safety instructions
⇨Result of an action
⇨Cross-references
1.
2.
Step-by-step instructions
Note
Recommendations and important information on how to handle
the product
1 General
Amarex KRT 7 of 58

2 Safety
All the information contained in this section refers to hazardous situations.
2.1 Key to safety symbols/markings
Table 4: Definition of safety symbols/markings
Symbol Description
!DANGER
DANGER
This signal word indicates a high-risk hazard which, if not avoided,
will result in death or serious injury.
!WARNING
WARNING
This signal word indicates a medium-risk hazard which, if not
avoided, could result in death or serious injury.
CAUTION
CAUTION
This signal word indicates a hazard which, if not avoided, could
result in damage to the machine and its functions.
General hazard
In conjunction with one of the signal words this symbol indicates a
hazard which will or could result in death or serious injury.
Electrical hazard
In conjunction with one of the signal words this symbol indicates a
hazard involving electrical voltage and identifies information about
protection against electrical voltage.
Machine damage
In conjunction with the signal word CAUTION this symbol indicates
a hazard for the machine and its functions.
2.2 General
This manual contains general installation, operating and maintenance instructions
that must be observed to ensure safe pump operation and prevent personal injury
and damage to property.
The safety information in all sections of this manual must be complied with.
This manual must be read and completely understood by the responsible specialist
personnel/operators prior to installation and commissioning.
The contents of this manual must be available to the specialist personnel at the site
at all times.
Information attached directly to the pump must always be complied with and be
kept in a perfectly legible condition at all times. This applies to, for example:
▪Arrow indicating the direction of rotation
▪Markings for connections
▪Name plate
The operator is responsible for ensuring compliance with all local regulations which
are not taken into account in this manual.
2.3 Intended use
The pump set must only be operated within the operating limits described in the
other applicable documents.
▪Only operate pump sets which are in perfect technical condition.
▪Do not operate partially assembled pump sets.
▪Only use the pump set to handle the fluids described in the data sheet or product
literature of the pump variant.
▪Never operate the pump set without the fluid to be handled.
!DANGER
2 Safety
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▪Observe the limits for continuous operation specified in the data sheet or
product literature (Qmin2) and Qmax3)) (to prevent damage such as shaft fracture,
bearing failure, mechanical seal damage, etc.).
▪When untreated waste water is handled, the duty points in continuous operation
lie within 0.7 to 1.2xQopt4) to minimize the risk of clogging/hardening.
▪Avoid duty points for continuous operation at very low speeds and small flow
rates (<0.7 x Qopt4)).
▪Observe the maximum flow rates indicated in the data sheet or product
literature (to prevent overheating, mechanical seal damage, cavitation damage,
bearing damage, etc).
▪Do not throttle the flow rate on the suction side of the pump set (to prevent
cavitation damage).
▪Consult the manufacturer about any use or mode of operation not described in
the data sheet or product literature.
▪Only use the respective impeller types in combination with the fluids described
below.
Free-flow impeller
(impeller type F)
Suitable for the following fluids
fluids containing solids and stringy
material as well as fluids with entrapped
air or gas
Closed single-channel
impeller
(impeller type E)
Suitable for the following fluids
Fluids containing solids and stringy
material
Closed multi-channel
impeller
(impeller type K)
Suitable for the following fluids
Contaminated, solids-laden, non-gaseous
fluids without stringy material
Open, diagonal single-
vane impeller
(impeller type D)
Suitable for the following fluids
Waste water with solid substances and
long fibers
Prevention of foreseeable misuse
▪Observe the minimum flow velocities required to fully open the swing check
valves to prevent the reduction of pressure and risk of clogging.
(Contact the manufacturer for the required minimum flow velocities/loss
coefficients.)
2) Minimum permissible flow rate
3) Maximum permissible flow rate
4) Best efficiency point
2 Safety
Amarex KRT 9 of 58

▪Never exceed the permissible operating limits (pressure, temperature, etc.)
specified in the data sheet or product literature.
▪Observe all safety information and instructions in this manual.
2.4 Personnel qualification and training
All personnel involved must be fully qualified to install, operate, maintain and
inspect the machinery this manual refers to.
The responsibilities, competence and supervision of all personnel involved in
installation, operation, maintenance and inspection must be clearly defined by the
operator.
Deficits in knowledge must be rectified by means of training and instruction
provided by sufficiently trained specialist personnel. If required, the operator can
commission the manufacturer/supplier to train the personnel.
Training on the pump (set) must always be supervised by technical specialist
personnel.
2.5 Consequences and risks caused by non-compliance with these operating
instructions
▪Non-compliance with these operating instructions will lead to forfeiture of
warranty cover and of any and all rights to claims for damages.
▪Non-compliance can, for example, have the following consequences:
– Hazards to persons due to electrical, thermal, mechanical and chemical
effects and explosions
–Failure of important product functions
– Failure of prescribed maintenance and servicing practices
– Hazard to the environment due to leakage of hazardous substances
2.6 Safety awareness
In addition to the safety information contained in this manual and the intended use,
the following safety regulations shall be complied with:
▪Accident prevention, health and safety regulations
▪Explosion protection regulations
▪Safety regulations for handling hazardous substances
▪Applicable standards and laws
2.7 Safety information for the operator/user
▪The operator shall fit contact guards for hot, cold and moving parts and check
that the guards function properly.
▪Never remove a contact guard while the pump is running.
▪Connect a ground conductor to the metal jacket if the fluid handled is
electrostatically charged.
▪Provide the personnel with protective equipment and make sure it is used.
▪Contain leakages (e.g at the shaft seal) of hazardous fluids handled (e.g.
explosive, toxic, hot) so as to avoid any danger to persons and the environment.
Adhere to all relevant laws.
▪Eliminate all electrical hazards. (In this respect refer to the applicable national
safety regulations and/or regulations issued by the local energy supply
companies.)
2 Safety
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2.8 Safety information for maintenance, inspection and installation work
▪Modifications or alterations of the pump are only permitted with the
manufacturer's prior consent.
▪Use only original spare parts or parts authorized by the manufacturer. The use of
other parts can invalidate any liability of the manufacturer for resulting damage.
▪The operator ensures that all maintenance, inspection and installation work is
performed by authorized, qualified specialist personnel who are thoroughly
familiar with the manual.
▪Only carry out work on the pump (set) during standstill of the pump.
▪The pump casing must have cooled down to ambient temperature.
▪Pump pressure must have been released and the pump must have been drained.
▪When taking the pump set out of service always adhere to the procedure
described in the manual. (⇨ Section 6.3 Page 32)
▪Decontaminate pumps which handle fluids posing a health hazard.
▪As soon as the work has been completed, re-install and/or re-activate any safety-
relevant and protective devices. Before returning the product to service, observe
all instructions on commissioning. (⇨ Section 6.1 Page 29)
2.9 Unauthorized modes of operation
Never operate the pump (set) outside the limits stated in the data sheet and in this
manual.
The warranty relating to the operating reliability and safety of the pump (set)
supplied is only valid if the equipment is used in accordance with its intended use.
2.10 Explosion protection
Special conditions apply to the operation of explosion-proof pumps.
▪The explosion-proof status of the pump set is only assured if the pump set is used
in accordance with its intended use.
▪The limits stated in the data sheet and on the name plate must not be exceeded
under any circumstances.
▪Correct monitoring of the motor temperature is imperative to ensure explosion
protection.
▪Observe the wiring diagrams. (⇨ Section 9.2 Page 54)
▪Never operate an explosion-proof pump set without temperature monitoring.
▪Modifications or alteration of the pump set may affect explosion protection and
are only permitted after consultation with the manufacturer.
▪Only original spare parts and accessories authorized by the manufacturer must be
used for explosion-proof pumps.
2 Safety
Amarex KRT 11 of 58

3 Transport/Temporary Storage/Disposal
3.1 Transport
DANGER
Improper transport
Danger to life from falling parts!
Damage to the pump set!
▷Use the attachment point provided (eyebolt, lifting lug or bail) for attaching
lifting accessories.
▷Never suspend the pump set by its power cable.
▷Never use the chains or lifting ropes included in KSB's scope of supply for lifting
loads other than the KSB product supplied.
▷Securely attach the lifting ropes or chains to the pump and crane.
Transport the pump set as illustrated.
3.2 Storage/Preservation
If commissioning is to take place some time after delivery, we recommend that the
following measures be taken:
CAUTION
Improper storage
Damage to the power cables!
▷Support the power cables at the cable entry to prevent permanent
deformation.
▷Only remove the protective caps from the power cables at the time of
installation.
CAUTION
Damage during storage by humidity, dirt or vermin
Corrosion/contamination of the pump (set)!
▷For outdoor storage cover the pump (set) or the packaged pump (set) and
accessories with waterproof material.
3 Transport/Temporary Storage/Disposal
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CAUTION
Wet, contaminated or damaged openings and connections
Leakage or damage to the pump set!
▷Only remove caps/covers from the openings of the pump set at the time of
installation.
Table 5: Ambient conditions for storage
Ambient conditions Value
Relative humidity 5 % to 85 %
(non-condensing)
Ambient temperature -4 °F to 158 °F [- 20 °C to + 70 °C]
▪Store the pump set under dry and vibration-free conditions, if possible in its
original packaging.
1. Spray-coat the inside wall of the pump casing, and in particular the impeller
clearance areas, with a preservative.
2. Spray the preservative through the suction and discharge nozzles.
It is advisable to then close the pump nozzles (e.g. with plastic caps or similar).
NOTE
Observe the manufacturer's instructions for application/removal of the preservative.
3.3 Return to supplier
1. Drain the pump as per operating instructions.
2. Always flush and clean the pump, particularly if it has been used for handling
noxious, explosive, hot or other hazardous fluids.
3. If the fluids handled by the pump (set) leave residues which might lead to
corrosion when coming into contact with atmospheric humidity, or which might
ignite when coming into contact with oxygen, the pump set must be
neutralized, and anhydrous inert gas must be blown through the pump for
drying purposes.
4. Always complete and enclose a certificate of decontamination when returning
the pump (set). (⇨ Section 10 Page 56)
Always indicate any safety and decontamination measures taken.
NOTE
If required, a blank certificate of decontamination can be downloaded from the
KSB web site at: www.ksb.com/certificate_of_decontamination
Also see
●Certificate of Decontamination [⇨ 56]
●Drainage/disposal [⇨ 40]
3 Transport/Temporary Storage/Disposal
Amarex KRT 13 of 58

3.4 Disposal
WARNING
Fluids posing a health hazard and/or hot fluids
Hazard to persons and the environment!
▷Collect and properly dispose of flushing liquid and any residues of the fluid
handled.
▷Wear safety clothing and a protective mask, if required.
▷Observe all legal regulations on the disposal of fluids posing a health hazard.
1. Dismantle the pump (set).
Collect greases and other lubricants during dismantling.
2. Separate and sort the pump materials, e.g. by:
- Metals
- Plastics
- Electronic waste
- Greases and other lubricants
3. Dispose of materials in accordance with local regulations or in another
controlled manner.
3 Transport/Temporary Storage/Disposal
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4 Description of the Pump (Set)
4.1 General description
Pump for handling untreated sewage and all types of waste water.
▪Close-coupled pump with shaft seal
▪Directly flanged standardized motor
▪Direct drive electric motor
4.2 Designation
Example: KRTK 100-251 / 74XKG-H
Table 6: Key to the designation
Code Description
KRT Type series
K Impeller type, e.g. K = channel impeller
100 Nominal discharge nozzle diameter (DN) [mm]
251 Maximum nominal impeller diameter [mm]
7 Motor size
4 Number of poles
X Motor version, e.g. X = explosion-proof version
K Dry installation (convection in air)
G Material variant, e.g. G = complete pump in grey cast iron
H Installation type, e.g. H = horizontal installation
4.3 Name plate
TYPE
No.
Q
P2
KSB SAS
F - 59320 Sequedin
Mat. No: 01232063 ZN 3826 - M 36
TEMP. MAX.
WANING - DO NOT OPEN WHEN ENERGIZED
THERMALLY PROTECTED
a) b)
°F lbs
H
Motor IP 68 SUBM. MAX. 100FT CLASS H
3~ M.-No.
HP VHz PF
RPM FLA LRA SF 1.15
TYPE
No.
Q
P2
KSB SAS
F - 59320 Sequedin
Mat. No: 1232058 ZN 3826 - M 31
TEMP. MAX.
WANING - DO NOT OPEN WHEN ENERGIZED
AVERTISSEMENT - NE PAS OUVRIR SOUS TENSION
MADE IN FRANCE
°F lbs
H
Motor IP 68 SUBM. MAX. 100FT CLASS F
3~ M.-No.
kW VHz PF
RPM FLA LRA SF
FM XP CLASS I, DIV. 1 GROUPS C&D T
MADE IN FRANCE
APPROVED
1
2
3
10
12
5
4
6
7
8
9
14
15
16
13
17
18
19
21
20
11
AMAREX KRT K 100 - 251 / 74 UKG-H
9971235943/000100
104 440
DKN 160.4-8
10
1780 12.1 88
0.86
460 60
123456
AMAREX KRT K 100 - 251 / 74 XKG-H
9971235943/000100
104 440
DKN 160.4-8
10
1780 12.1 88
0.86
460 60
123456
600 US-gpm 42 ft
1.15
2010 2010
600 US-gpm 42 ft
Fig. 1: Name plate a) Standard pump set b) Explosion-proof pump set
1 Designation 2 KSB order number
3 Flow rate 4 Maximum fluid and ambient
temperature
5 Enclosure 6 Motor type
7 Rated power 8 Rated speed
9 Rated voltage 10 Rated current
11 Head 12 Year of construction
13 Total weight 14 Maximum immersion depth
15 Thermal class of winding
insulation
16 Motor number
17 Power factor at design point 18 Rated frequency
19 Mode of operation 20 Starting current ratio
21 Explosion protection marking
4.4 Design details
Design
▪Fully floodable submersible motor pump
4 Description of the Pump (Set)
Amarex KRT 15 of 58

▪Not self-priming
▪Close-coupled design
Impeller type
▪Various, application-oriented impeller types
Shaft seal
▪Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
Standard bearing assembly
▪Grease-packed bearings sealed for life
▪Maintenance-free
Drive
▪Three-phase asynchronous squirrel-cage motor
Motors integrated in explosion-proof pump sets are supplied with a fire-proof
housing suitable for use in Class I, Div. 1; Groups C&D classified hazardous
environments.
4.5 Types of installation
Table 7: Types of installation
Type of installation Illustration Description
Horizontal dry installation (installation type H) Pump set with directly flanged
motor, horizontal installation
Vertical dry installation (installation type D) Pump set with directly flanged
motor, vertical installation, with
suction duckfoot bend
4 Description of the Pump (Set)
16 of 58 Amarex KRT

4.6 Configuration and function
1
3
4
6
7
8
9
10
5
2
Fig. 2: Sectional drawing
1 Casing wear ring 2 Discharge nozzle
3 Discharge cover 4 Shaft
5 Bearing bracket 6 Suction nozzle
7 Impeller 8 Shaft seal
9 Bearing, pump-end 10 Bearing, motor-end
The pump is designed with an axial fluid inlet and a radial outlet. The hydraulic
system sits on the extended motor shaft. The shaft runs in common bearings.
The fluid enters the pump axially via a suction nozzle (6) and is accelerated outward
in a cylindrical flow by the rotating impeller (7). In the flow passage of the pump
casing the kinetic energy of the fluid is converted into pressure energy. The fluid is
pumped to the discharge nozzle (2), where it leaves the pump. The casing wear ring
(1) prevents any fluid from flowing back from the casing into the inlet. At the rear
side of the impeller, the shaft (4) enters the casing via the discharge cover (3). The
shaft passage through the pump casing is sealed towards the atmosphere with a
shaft seal (8). The shaft runs in rolling element bearings (9 and 10), which are
supported by a bearing bracket (5) connected to the pump casing and/or discharge
cover.
The pump is sealed by two bi-directional mechanical seals in tandem arrangement.
A lubricant chamber in-between the seals ensures cooling and lubrication of the
mechanical seals.
Design
Function
Sealing
4 Description of the Pump (Set)
Amarex KRT 17 of 58

4.7 Noise characteristics
Table 8: Surface sound pressure level LpA5)
Rated power
P2
[hp]
Pump set
3500 rpm
[dB]
1750 rpm
[dB]
1160 rpm
[dB]
5.4 68.5 62.0 60.5
7.4 70.0 63.5 63.0
10.0 71.0 65.0 63.5
4.8 Scope of supply
Depending on the model, the following items are included in the scope of supply:
▪Pump set complete with power cables
▪Foundation rails (for horizontal installation)
▪Suction-side flanged taper piece or intake elbow with inspection hole
▪Suction duckfoot bend (for vertical installation)
NOTE
A separate name plate is included in KSB's scope of supply.
This name plate must be attached in a clearly visible position outside the place of
installation, e.g. at the control panel, pipeline or mounting bracket.
4.9 Dimensions and weights
For dimensions and weights please refer to the general arrangement drawing/outline
drawing or data sheet of the pump set.
5) Measured at a distance of 1 m from the pump outline
4 Description of the Pump (Set)
18 of 58 Amarex KRT

5 Installation at Site
5.1 Safety regulations
DANGER
Improper installation in potentially explosive atmospheres
Damage to the pump set!
▷Comply with the applicable local explosion protection regulations.
▷Observe the information given in the data sheet and on the pump/motor name
plates.
5.2 Checks to be carried out prior to installation
Place of installation
WARNING
Installation on foundations which are unsecured and cannot support the load
Personal injury and damage to property!
▷Make sure the foundation concrete is of sufficient strength (min. 3000 psi
[C12/15 to DIN 1045]).
▷Only place the pump (set) on a foundation whose concrete has set firmly.
▷Only place the pump set on a horizontal and level surface.
▷Refer to the weights given in the general arrangement drawing.
Any resonances at the usual excitation frequencies (1x and 2x rotational frequency,
rotational noise) must be prevented both in the foundation and in the connected
piping, as such frequencies may cause extreme vibrations.
1. Check the structural requirements.
All structural work required must have been prepared in accordance with the
dimensions stated in the outline drawing/general arrangement drawing.
5.3 Checking the lubricant level
The lubricant chambers have been filled with an environmentally friendly, non-toxic
lubricant at the factory.
1. Position the pump set as shown.
903.03
411.03
Fig. 3: Checking the lubricant level
2. Unscrew screw plug 903.03 with joint ring 411.03.
⇨The lubricant level must reach the filler opening.
3. If the lubricant level is lower, top up lubricant through the filler opening until
the lubricant reservoir overflows.
4. Close screw plug 903.03 with joint ring 411.03.
Resonances
5 Installation at Site
Amarex KRT 19 of 58

5.4 Checking the direction of rotation
DANGER
Pump set running dry
Explosion hazard!
▷Check the direction or rotation of explosion-proof pump sets outside
potentially explosive atmospheres.
WARNING
Hands or objects inside the pump casing
Risk of injury, damage to the pump!
▷Never insert your hands or any other objects into the pump.
▷Check that the inside of the pump is free from any foreign objects.
CAUTION
Pump set running dry
Increased vibrations!
Damage to mechanical seals and bearings!
▷Never operate the pump set without the fluid to be handled for more than 60
seconds.
✓The pump set is positioned as illustrated below and secured against rolling off.
✓The pump set is connected to the power supply.
1. Start the pump set and stop it again immediately to determine the motor's
direction of rotation.
2. Check the direction of rotation.
Impeller rotation must be anti-clockwise (seen from the pump mouth end). On
some pump casings, the direction of rotation is marked by an arrow.
Fig. 4: Checking the direction of rotation
3. If the impeller is running in the wrong direction of rotation, check the electrical
connection of the pump and the control system, if necessary.
4. Disconnect the pump set from the power supply and make sure it cannot be
switched on accidentally.
5.5 Installing the pump set
Fastening
▪Fasten the pump feet with or without foundation rails or the suction duckfoot
bend to a concrete foundation with chemical anchors.
5 Installation at Site
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