OSNA CVP 423 User manual

Ver.17-01
Original Operating Manual
CVP High-Pressure Centrifugal Pump
OSNA-Pumpen GmbH
Brückenstrasse 3
49090 Osnabrück, Germany
Phone: [phone] - 0
Fax: [phone] - 220
Internet: http://www.osna.de
E-mail: [e-mail]

CVP High-Pressure Centrifugal Pump 1
Contents
1 GENERAL...................................................................................................................................4
1.1 About this operating manual..................................................................................................4
1.2 Target groups .......................................................................................................................4
1.3 Other valid documents..........................................................................................................4
1.4 Warning notices and symbols................................................................................................5
1.5 Copyright/changes................................................................................................................5
2 SAFETY......................................................................................................................................6
2.1 Correct and proper use .........................................................................................................6
2.2 General safety instructions....................................................................................................7
2.2.1 Product safety................................................................................................................7
2.2.2 Duties of the system owner............................................................................................7
2.2.3 Duties of personnel........................................................................................................8
2.3 Dangers of non-observance of the safety instructions............................................................9
2.4 Unauthorized conversion and production of spare parts.........................................................9
2.5 Unauthorized modes of operation..........................................................................................9
2.6 Special hazards....................................................................................................................9
2.6.1 Explosion area...............................................................................................................9
2.6.2 Hazardous pumping media.............................................................................................9
2.6.3 Noise emissions.............................................................................................................9
3 LAYOUT AND FUNCTION........................................................................................................10
3.1 Labeling..............................................................................................................................10
3.2 Scope of delivery for a type-CVP high-pressure centrifugal pump........................................10
3.3 General information.............................................................................................................11
3.4 Technical data ....................................................................................................................11
4 TRANSPORT AND INTERMEDIATE STORAGE.......................................................................13
4.1 Transport............................................................................................................................13
4.1.1 Unpacking and checking the delivery condition.............................................................13
4.1.2 Lifting...........................................................................................................................13
4.2 Intermediate storage...........................................................................................................14
4.3 Storage...............................................................................................................................14
4.4 Disposal..............................................................................................................................15
5 ASSEMBLY AND INSTALLATION............................................................................................16
5.1.1 Preparing the installation location.................................................................................16
5.1.2 Preparing the base surface and foundations.................................................................16
5.2 Installation ..........................................................................................................................16
5.2.1 Installing the pump.......................................................................................................16
5.2.2 Assembling the motor...................................................................................................17

2 CVP High-Pressure Centrifugal Pump
5.2.3 Electrical connection....................................................................................................18
5.2.4 Adjusting the pump rotor..............................................................................................19
5.3 Pipelines.............................................................................................................................20
6 COMMISSIONING/ DECOMMISSIONING .................................................................................22
6.1 Commissioning...................................................................................................................22
6.1.1 Determining the pump configuration.............................................................................22
6.1.2 Filling the pump............................................................................................................22
6.1.3 Checking direction of rotation.......................................................................................22
6.1.4 Starting the pump.........................................................................................................23
6.2 Decommissioning................................................................................................................24
6.2.1 Draining the pump and protecting against frost.............................................................25
6.3 Recommissioning................................................................................................................25
6.4 Mechanical seal..................................................................................................................25
7 MAINTENANCE AND REPAIR..................................................................................................27
7.1 General information.............................................................................................................27
7.2 Sending the pump to the manufacturer................................................................................28
8 FAULTS AND TROUBLESHOOTING........................................................................................29
9 APPENDIX................................................................................................................................32
9.1 Service, spare parts, accessories........................................................................................32
9.2 Individual parts of the CVP centrifugal pump.......................................................................33
9.3 Declaration of Conformity as per EC Directive 2006/42/EC, Annex IIA.................................35
9.4 Clearance Certificate...........................................................................................................36

CVP High-Pressure Centrifugal Pump 3
List of Tables
Table 1: Target groups and their tasks ................................................................................................4
Table 2: Other valid documents and their purposes............................................................................4
Table 3: Warning notices and consequences of non-observance........................................................5
Table 4: Symbols and their meanings..................................................................................................5
Table 5: Values table CVP 423 .........................................................................................................12
Table 6: Values table CVP 426 .........................................................................................................12
Table 7: Values table CVP 428 .........................................................................................................12
Table 8: Measures in the event of operational interruption................................................................24
Table 9: Measures depending on the behavior..................................................................................24
Table 10: Measures following longer shut down times.......................................................................25
Table 11: Measures for return...........................................................................................................28
Table 12: Fault/number allocation .....................................................................................................29
Table 13: Troubleshooting table........................................................................................................31
Table 14: Parts list of the CVP centrifugal pump................................................................................34
List of Images
Figure 1: CVP model code................................................................................................................10
Figure 2: Scope of deliveryfor type CVP...........................................................................................10
Figure 3: Dimensions on the CVP centrifugal pump...........................................................................11
Figure 4: Lifting a CVP centrifugal pump...........................................................................................13
Figure 5: Foundation plan for CVP 423 to 428...................................................................................17
Figure 6: Overhead view of coupling.................................................................................................18
Figure 7: Adjusting the pump rotor ....................................................................................................19
Figure 8: Functional and operating elements.....................................................................................20
Figure 9: Explosion diagram of the CVP centrifugal pump.................................................................33

1 General
4 CVP High-Pressure Centrifugal Pump
1 General
1.1 About this operating manual
This operating manual contains important in-
structions that must be observed during instal-
lation, operation and maintenance. For this
reason, ensure that it is read by specialist per-
sonnel and the responsible operator/owner
prior to assembly and commissioning. The
manual must be available at all times at the lo-
cation where the system is used.
Please observe the safety instructions de-
scribed in this operating manual, along with the
relevant national accident prevention regula-
tions and any internal work, operational and
safety specifications of the operator. We as-
sume no liability for damages and operational
interruptions resulting from non-observance of
this operating manual.
WARNING
Pay particular attention to section 2 "Safety in-
structions" during commissioning and all
maintenance work.
Section 2 also provides an explanation of the
symbols used in this manual. Knowledge of
this operating manual is essential to preventing
errors and ensuring safe and uninterrupted
operation.
The operating specification does not take local
safety regulations into account. The owner
bears full responsibility for compliance with
these, including on the part of the assembly
personnel used.
This operating manual:
·is part of the pump
·is valid for all type series mentioned
·describes safe and proper use in all
phases of operation
1.2 Target groups
Target group Task
System owner ►Ensure that this manu-
al is available at the loca-
tion where the system is
used, including for later
reference.
►Ensure that personnel
read and observe this op-
erating manual and the
other valid documents, in
particular the safety and
warning information.
►Observe additional
system-related regula-
tions and specifications.
Specialist personnel,
assembly staff
►Read, observe and fol-
low this operating manual
and the other valid docu-
ments, in particular the
safety and warning infor-
mation.
Table 1: Target groups and their tasks
1.3 Other valid documents
Document Purpose
Installation diagram Installation dimensions,
connection dimensions,
etc.
Spare parts list Ordering spare parts
Clearance certificate Returning the pump
Declaration of
conformity Conformity with stand- ards, content of the dec-
laration of conformity
Table 2: Other valid documents and
their purposes

1 General
CVP High-Pressure Centrifugal Pump 5
1.4 Warning notices and symbols
Warning notice Hazard
level Consequenc- es of non-
observance
DANGER
Immediate
hazard Death, severe physical injury
WARNING
Potential
hazard Death, severe physical injury
CAUTION
Potentially
dangerous
situation
Minor physical
injury
NOTICE Potentially
dangerous
situation
Material dam-
age
Table 3: Warning notices and consequences of
non-observance
Symbol Meaning
Safety sign
►Follow all instructions
identified with safety signs
in order to avoid death or
injuries.
►Instruction
1. , 2. , …Instruction with multiple
steps
Condition
→Reference
Information, note
Table 4: Symbols and their meanings
1.5 Copyright/changes
The intellectual property and all copyrights re-
lated to this technical documentation remain
exclusively with OSNA-Pumpen GmbH. All
rights reserved, in particular the right to repro-
duction and distribution of this documentation,
including translations thereof.
No part of this documentation may be repro-
duced in any form (print, photocopy, microfilm
or any others process), stored, processed, re-
produced or distributed using electronic sys-
tems without written permission.
Editorial changes reserved exclusively by
OSNA-Pumpen GmbH.
Any violation is punishable and subject to
compensation.
OSNA GmbH reserves the right to change the
contents of this documentation without notice.

2 Safety
6 CVP High-Pressure Centrifugal Pump
2 Safety
The manufacturer shall not bear any liability
for damages caused as a result of non-
observance of this documentation.
2.1 Correct and proper use
·Only use this pump for the purposes of
conveying the agreed pumping media.
·Comply with operating limits.
·The pumping medium may not contain
any abrasive or long-fibered compo-
nents that may damage the pump ma-
terials. Consult the manufacturer if us-
ing other media.
·Ensure that the pump is only commis-
sioned with pumping medium and is
not operated without it.
·Open the suction-side fitting, and do
not use it to control the flow rate.
·To avoid damaging the motor, observe
the permitted number of times per
hour that the motor can be switched
on (→Manufacturer information).
·Any other use must be agreed with the
manufacturer.
·The temperature of the pumping me-
dium must not exceed 80 °C.
Avoiding obvious misuse (examples)
·Observe the operating limits of the
pump for temperature, pressure, flow
rate and speed.
The main areas of use are:
·Pressure boosting systems, heating
systems, hot and cooling water circula-
tion, water supply systems, power sta-
tions, filtering systems, fire extinguish-
er and sprinkler systems, and pro-
cessing machinery
·Fresh water, drinking water, boiler
feed water, process water, sea and
brackish water, hot water, condensate,
lyes, drilling and cutting oils, and many
media without aggressive components
that do not chemically corrode the ma-
terials used in the pump
Do not operate the pump without pumping me-
dium. Dry running can lead to damage to the
pump.
Ensure that the foot valve is in the pumping
medium at all times during suction.
WARNING
Any use that goes beyond the purposes
described above shall be considered im-
proper use. OSNA shall bear no liability for
any resulting damages. The owner bears
full risk for improper use.

2 Safety
CVP High-Pressure Centrifugal Pump 7
2.2 General safety instructions
Please observe the following specifications
before performing any activities.
2.2.1 Product safety
This pump is constructed according to the lat-
est state of the art and accepted safety rules.
Nevertheless, risks to life and limb for the user
or third parties are still possible when using the
pump, as are impairments to the pump and
other material assets.
·Only use the pump in a technically
perfect state and for the intended pur-
pose. Ensure compliance with this op-
erating manual and be aware of the
hazards and safety issues during op-
eration.
·Keep this operating manual and all
other valid documents in a complete
and legible state, and store in a loca-
tion that is accessible at all times to
personnel.
·Do not permit any activity that endan-
gers personnel or uninvolved third par-
ties.
·In the event of a safety-relevant fault,
stop the pump immediately and have
the fault rectified by responsible per-
sonnel.
·In addition to this documentation, en-
sure compliance with the statutory or
other regulations for safety and acci-
dent prevention, as well as the rele-
vant standards and specifications of
the respective country.
·Do not remove any technical stickers.
2.2.2 Duties of the system owner
Safety-conscious work
Observe the safety specifications detailed in
this operating manual, along with the occupa-
tional safety regulations and all additional in-
ternal safety regulations.
·Only use the pump in a technically
perfect state and for the intended pur-
pose. Ensure compliance with this op-
erating manual and be aware of the
hazards and safety issues during op-
eration.
·Ensure compliance and monitoring:
-correct and proper use
-statutory or other safety and acci-
dent prevention regulations
-safety specifications for handling
hazardous substances
·Provide personal protective equip-
ment.
·Do not remove contact protection dur-
ing operation.
·Prevent any dangers from electrical
energy (for details, please refer to the
specifications of the VDE and the local
energy supplier).
·Switch off the motor during all assem-
bly and maintenance works, and se-
cure against reactivation.
·Only work on the system when the
pump is at a standstill.

2 Safety
8 CVP High-Pressure Centrifugal Pump
Personnel qualification
The owner of the system must ensure that the
personnel tasked with working on the pump
have read and understood this operating man-
ual and all other valid documents before be-
ginning work, in particular information on safe-
ty, maintenance and repair.
Work of any kind on the machine may only be
performed when it has been completely de-
commissioned. Reinstall and reactivate all
safety mechanisms after work.
Before restarting the machine, ensure that all
necessary commissioning steps have been
completed (→6.1 Commissioning, pg 22).
·Determine responsibilities, tasks and
monitoring for personnel.
·Only allow work of any kind to be per-
formed by specialist technical person-
nel:
-assembly, maintenance and repair
work
-work on the electrical systems
·Only allow personnel undergoing train-
ing to perform work on the pump under
the supervision of specialist technical
personnel.
Safety mechanisms
·Provide the following safety mecha-
nisms and ensure that they function
correctly:
-for moving components: contact
protection for the pump, installed
by the customer
-for potential electrostatic charges:
provide appropriate earthing
Guarantee
·Please consult the manufacturer be-
fore carrying out any conversions, re-
pairs or changes during the guarantee
period.
·Only use original parts or parts ap-
proved by the manufacturer.
2.2.3 Duties of personnel
·Observe the information on the pump
and ensure it is legible (e.g. direction
of rotation arrow, fluid connection indi-
cators).
·Do not remove the contact protection
for moving parts during operation.
·Use personal protective equipment if
necessary.
·Only work on the system when the
pump is at a standstill.
·Switch off the motor during all assem-
bly and maintenance works, and se-
cure against reactivation.
·Reinstall the safety mechanisms after
working on the pump according to
specifications.

2 Safety
CVP High-Pressure Centrifugal Pump 9
2.3 Dangers of non-observance of
the safety instructions
·Non-observance of the safety instruc-
tions can lead to hazards to personnel,
the machine and the environment.
·Non-observance of the safety instruc-
tions can also lead to the loss of any
damage claims.
·In particular, non-observance can lead
to the following dangers:
-failure of important system func-
tions
-electrical and mechanical hazards
to personnel
2.4 Unauthorized conversion and
production of spare parts
Conversions or changes to the machine are
only permitted following consultation with the
manufacturer. Original spare parts and acces-
sories authorized by the manufacturer help en-
sure safety. The manufacturer bears no liability
for the consequences of the use of other parts.
2.5 Unauthorized modes of opera-
tion
The operational safety of the machine is only
guaranteed when it is used for the intended
purpose according to the operating manual (→
2.1 Correct and proper use, pg 6).
Never exceed the limit values indicated in the
technical data (→3.4 Technical data, pg 11).
2.6 Special hazards
2.6.1 Explosion area
·Do not use the pump in areas where
there is a risk of explosion.
2.6.2 Hazardous pumping media
·Observe the safety regulations for
handling hazardous substances (e.g.
toxic, hazardous to health).
·Use personal protective equipment
when performing work on the pump.
2.6.3 Noise emissions
The maximum continuous sound pressure lev-
el of a correctly installed and commissioned
CVP high-pressure centrifugal pump is 70
dB(A).

3 Layout and function
10 CVP High-Pressure Centrifugal Pump
3 Layout and function
3.1 Labeling
This operating manual applies to pumps of the
CVP 423, CVP 426 and CVP 428 series.
Model code:
Figure 1: CVP model code
3.2 Scope of delivery for a type-
CVP high-pressure centrifugal pump
The customer can order the pump:
·in a preassembled state, i.e. delivery
without motor. The motor is installed
by the customer.
·in a fully assembled state, i.e the
pump is fitted with motor ex-works.
Figure 2: Scope of delivery for type CVP
1 Pump
2 Drive motor
3 Coupling guard
4 Delivery-side counter flange
5 Suction-side counter flange (oval)
The scope of delivery corresponds to the
scope indicated in the order. Please check that
the delivery is complete upon receipt. Notify
the delivery company of any transport damage
immediately. Please also refer to our condi-
tions of sale and delivery.

3 Layout and function
CVP High-Pressure Centrifugal Pump 11
3.3 General information
The CVP is a non-self-priming, multi-stage
high-pressure centrifugal pump in a vertical
configuration (staged centrifugal pump). It fea-
tures a variable connection point. The pumps
are fitted with mechanical seals. Fluid-
lubricated plain bearings are used. Materials:
The shafts and impellers are made from stain-
less steel, the diffusers and wear plates are
made from plastic, the suction and delivery
casings are made from gray cast iron, and the
stage casing is made from steel (stainless
steel available). Other materials are also used
depending on customer requirements or the
needs of the pumping medium. Only drive CVP
pumps with electric motors that have a fixed
bearing that cannot be shifted from the B side
to the A side. The complete unit is fully as-
sembled and includes the pump, drive motor,
coupling and coupling guard.
3.4 Technical data
Please check the pump type on the type
plate to determine the correct gap.
Figure 3: Dimensions on the CVP centrifugal pump

3 Layout and function
12 CVP High-Pressure Centrifugal Pump
CVP 423
Flow rate at n = 2900 min-1
Motor
l/min 16.7
33.3
50
66.7
83.3
100
116.7
133.3
150
166.7
183.3
No. of Pump Output
m³/h 1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
stages H size (kW) L B
Total delivery head m
2 166
71 0.37 493 292
423/ 2
19
18
17
16
14
11
8
4 242
80 0.75 600 373
423/ 4
39
38
35
32
28
22
16
6 318
80 1.1 676 449
423/ 6
59
56
53
48
41
33
24
8 394
90 1.5 768 525
423/ 8
79
75
71
64
55
44
32
10 470
90 2.2 869 601
423/10
98
94
88
79
69
55
39
12 546
90 2.2 945 677
423/12
118
113
106
95
83
66
47
14 622
100 3.0 1068
763
423/14
137
131
123
111
96
77
55
16 698
100 3.0 1144
839
423/16
157
150
141
127
110
88
63
18 774
112 4.0 1234
915
423/18
177
169
159
143
124
99
71
Table 5: Values table CVP 423
CVP 426
Flow rate at n = 2900 min-1
Motor
l/min 16.7
33.3
50
66.7
83.3
100
116.7
133.3
150
166.7
183.3
No. of Pump Output
m³/h 1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
stages H size (kW) L B
Total delivery head m
2 166
71 0.55 493 292
426/ 2
22
22
21
20
19
18
17
15
12
9
6
4 242
80 1.1 600 373
426/ 4
44
43
42
41
39
37
33
29
25
19
12
6 318
90 1.5 692 449
426/ 6
65
64
63
61
59
55
50
44
37
28
17
8 394
90 2.2 793 525
426/ 8
87
86
84
82
78
73
67
59
49
37
23
10 470
100 3.0 916 611
426/10
108
107
105
102
98
91
83
73
61
46
29
12 546
112 4.0 1006
687
426/12
130
128
126
122
117
110
100
88
73
56
35
14 622
112 4.0 1082
763
426/14
151
149
147
143
137
128
116
102
86
65
40
16 698
132 5.5 1221
859
426/16
173
171
168
163
156
146
133
117
98
74
46
18 774
132 5.5 1297
935
426/18
195
192
189
183
176
164
150
132
110
83
52
Table 6: Values table CVP 426
CVP 428
Flow rate at n = 2900 min-1
Motor
l/min 16.7
50.0
83.3
116.7
150
166.7
183.3
200
216.7
233.3
250
No. of Pump Output
m³/h 1.0
3.0
5.0
7.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
stages H size (kW) L B
Total delivery head m
2 166
80 1.1 524
297
428/ 2
25
25
24
22
20
19
18
17
16
14
13
4 242
90 2.2 641
373
428/ 4
49
48
46
44
40
38
36
34
31
28
25
5 280
90 2.2 679
411
428/ 5
62
60
58
55
50
48
45
42
39
35
31
6 318
100 3.0 764
459
428/ 6
74
72
69
65
60
58
54
51
47
42
38
8 394
112 4.0 854
535
428/ 8
99
96
92
87
80
77
72
68
62
56
50
10 470
132 5.5 993
631
428/10
124
120
116
109
100
96
90
85
78
70
63
Table 7: Values table CVP 428
Note: 1) CVP 423 and 426/2-10 with V 18 small three-phase motor
2) CVP 423 and 426/12-18, and 428/2-10 V 1 three-phase motor and delivery casing with
threaded counter flange (round) R 1 1/4" PN 25; DIN 2567
3) Motor output applies to 50-Hz/2-pole three-phase motors

4 Transport and intermediate storage
CVP High-Pressure Centrifugal Pump 13
4 Transport and intermediate
storage
4.1 Transport
Weight information (→Other valid docu-
ments)
4.1.1 Unpacking and checking the de-
livery condition
1. Check that the delivery is complete
upon receipt.
2. Unpack the pump/unit upon delivery
and check for transport damage.
3. Notify the delivery company of any
transport damage immediately.
4. Dispose of the packaging material in
line with the applicable local regula-
tions.
4.1.2 Lifting
DANGER
Risk of death or crushed limbs from falling
transported goods!
►Choose lifting equipment that is suitable for
the total weight to be transported.
►Do not stand under suspended loads.
Figure 4: Lifting a CVP centrifugal pump

4 Transport and intermediate storage
14 CVP High-Pressure Centrifugal Pump
4.2 Intermediate storage
Ensure during intermediate storage that the
pump is not exposed to any weather conditions
for a long period of time. If the pump is de-
commissioned for a longer period of time (ap-
proximately 2 to 3 months), ensure that it is ful-
ly drained. (→6.2 Decommissioning, pg 24)
4.3 Storage
NOTICE
Material damage due to incorrect storage!
►Ensure that the pump is correctly stored.
1. Close all openings with blank flanges,
blind plugs or plastic covers.
2. Ensure that the storage area meets
the following conditions:
–dry
–free of frost
–free of vibrations
3. Rotate the shaft once per month by
several rotations.
NOTICE
Damage to bearings due to high water
pressure or splashing water!
►Do not use water jets or steam jet cleaners
to clean the bearing areas and motor.
NOTICE
Damage to seals due to incorrect cleaning
agent!
►Ensure that the cleaning agent does not
corrode the seals.
1. Choose the cleaning agent according
to the area of use.
2. Dispose of preservatives in line with
the applicable local regulations.
3. When storing for longer than 6
months:
–Check all elastomers (round seals,
shaft seal rings, gaskets and gland
packing) for elasticity, and replace
if necessary.

4 Transport and intermediate storage
CVP High-Pressure Centrifugal Pump 15
4.4 Disposal
Plastic parts may be contaminated by toxic
or radioactive pumping media. If this is the
case, cleaning is not sufficient.
WARNING
Risk of poisoning and environmental dam-
age from pumping medium!
►Use personal protective equipment when
performing work on the pump.
►Before disposing of the pump:
–Collect any remaining pumping
medium in the pump, and dispose
of it in line with the locally valid
regulations.
–Neutralize any pumping medium
residues in the pump.
►Dispose of the pump in line with the appli-
cable local regulations.

5 Assembly and installation
16 CVP High-Pressure Centrifugal Pump
5 Assembly and installation
NOTICE
Material damage due to contamination!
►Only remove covers, transport caps and
sealing caps immediately before connecting
the pump to the pipelines.
CAUTION
Ensure compliance with all safety specifi-
cations during installation and operation.
1. Please consult the manufacturer when
installing at altitudes over 1000 m
above mean sea level.
5.1.1 Preparing the installation loca-
tion
►Ensure that the installation location meets
the following conditions:
–pump is freely accessible from all
sides
–sufficient space for installing/removing
piping, as well as for maintenance and
repair work, in particular for in-
stalling/removing the pump and motor
–no effects from external vibrations on
the pump (bearing damage)
–protection against frost
5.1.2 Preparing the base surface and
foundations
►Ensure that the base surface and founda-
tions meet the following conditions:
–level
–clean (no oils, dust or other contami-
nations)
–foundations can support the weight of
the pump unit and all operating forces
–stability of the pump unit ensured
5.2 Installation
5.2.1 Installing the pump
Prior to installation, remove the packaging (if
present) and check the pump for any transport
damage. Ensure that the installation area is
dry and free of frost.
CAUTION
Do not operate the pump in areas where
there is a risk of explosion. Ensure that the
pump is installed and connected in line
with the local regulations.

5 Assembly and installation
CVP High-Pressure Centrifugal Pump 17
We recommend installing the pump on a
noise-insulating base, in order to prevent
transmission noises to parts of the building.
Provide an outlet for leakage fluid during
maintenance work.
The pump's suction casing is shown as the
base, and must be secured free of tension to a
foundation using 4 M12 screws (àFigure 5,
pg 17).
Figure 5: Foundation plan for CVP 423 to 428
CAUTION
Install the pump in such a way that pre-
vents flooding of building sections as the
result of a leak or when performing mainte-
nance work.
5.2.2 Assembling the motor
Clean the motor shaft of any anti-rust agent
and remove the keys if present.
Remove the socket head cap screws (29 and
30) of the coupling shells (28), place the motor
on the delivery casing (20 or 26), and secure
with screws (see Table 14, pg 34). Manually
tighten the socket head cap screws on the
coupling shells slightly, ensuring that the gap
between the coupling shells is even (àFigure
6, pg 18). Please also refer to 6.1.3 Checking
direction of rotation, pg 22 for information on
checking the direction of rotation.

5 Assembly and installation
18 CVP High-Pressure Centrifugal Pump
Figure 6: Overhead view of coupling
CAUTION
Incorrect direction of rotation on the pump
can lead to damage to the mechanical seal
and a reduction in performance. The pump
shaft must rotate clockwise, as seen from
the motor.
DANGER
Never operate the pump without the cou-
pling guard.
DANGER
Risk of death due to rotating parts!
►Use personal protective equipment when
performing work on the pump.
►Prevent the keys from being slung away
when checking the direction of rotation.
►Ensure sufficient clearance to rotating
parts.
5.2.3 Electrical connection
CAUTION
Electrical connection must be carried out
by a specialist electrician, in line with the
specifications of the local energy supplier
or the VDE.
Install a motor protection switch to protect the
motor.