Allweiler CNH-B series Installation instructions

Centrifugal pump with
volute casing
Original Operating Manual CNH-B series
Version BA-2017.02 en-US
ID-No. 550 115
145-353/0
ALLWEILER GmbH
Postfach 1140
Allweilerstr. 1
78301 Radolfzell
Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: http://www.allweiler.com
We reserve the right to make technical changes.
Read carefully before use.
Save for future use.

Table of contents
Table of contents
1 About this document ............................... 6
1.1 Target groups ................................. 6
1.2 Other applicable documents ................ 6
1.3 Warnings and symbols ....................... 7
1.4 Technical terms ............................... 7
2 Safety ................................................. 8
2.1 Intended use .................................. 8
2.2 General safety instructions .................. 8
2.2.1 Product safety ................................ 8
2.2.2 Operator's obligations ........................ 9
2.2.3 Duties of the operating personnel ... .. .. . . . . 9
2.3 Special hazards .............................. 9
2.3.1 Explosion hazard area ....................... 9
2.3.2 Hazardous pumped media .................. 9
3 Layout and function ................................ 10
3.1 Labels ......................................... 10
3.1.1 Type plate ..................................... 10
3.1.2 ATEX plate .................................... 10
3.1.3 Pump type code .............................. 10
3.2 Construction .................................. 11
3.3 Shaft seals .................................... 11
3.3.1 Mechanical seals ............................. 11
3.3.2 Packing gland ................................ 11
3.4 Auxiliary systems . .. .. . . . . . . . . . .. .. .. .. .. . . . . . 12
3.4.1 Sealing systems . . . . . .. . . . . . . . . . . . . . .. . . . . .. .. 12
3.4.2 Cooling the bearing housing ................ 13
3.4.3 Cooling the shaft seal ........................ 13
3.4.4 Heating the housing .......................... 13
4 Transport, storage and disposal .................. 14
4.1 Transport ...................................... 14
4.1.1 Unpacking and inspection on delivery .. .. . . 14
4.1.2 Lifting .......................................... 14
4.2 Preservation .................................. 15
4.3 Storage ....................................... 15
4.4 Remove the preservative treatment .. .. . . . . 15
4.5 Disposal ....................................... 15
5 Setup and connection .............................. 16
5.1 Preparing the setup .......................... 16
5.1.1 Checking the ambient conditions .. .. . . . .. . . 16
5.1.2 Preparing the site for the installation .. . . . .. 16
5.1.3 Preparing the foundations and installation
surface ........................................ 16
5.1.4 Remove the preservative treatment ... . . . .. 16
5.1.5 Installing the heat insulation (optional) ... . . 16
5.2 Installing with foundations ................... 17
5.2.1 Setting the pump aggregate on the
foundation .................................... 17
5.2.2 Fixing the pump aggregate .................. 17
5.3 Installation without foundation . . .. . . . .. . . . . . . 18
5.4 Mounting the motor .......................... 18
5.5 Planning the piping ........................... 18
5.5.1 Specifying supports and flange
connections ................................... 18
5.5.2 Specifying nominal diameters . . . .. . . . .. .. . . . 19
5.5.3 Specifying pipe lengths ...................... 19
5.5.4 Optimizing cross-section and direction
changes ....................................... 19
5.5.5 Discharging leaks ............................ 19
5.5.6 Providing safety and control devices
(recommended) .............................. 19
5.6 Connecting the pipes ........................ 19
5.6.1 Keep the piping clean ........................ 19
5.6.2 Installing auxiliary piping ..................... 20
5.6.3 Installing the suction pipe .................... 20
5.6.4 Installing the pressure pipe .................. 20
5.6.5 Inspection for stress-free pipe
connections ................................... 20
5.6.6 Inspecting the support foot (183.1) for
distortion ...................................... 20
5.7 Electrical connection ......................... 20
5.7.1 Connecting the motor ........................ 20
5.7.2 Checking the direction of rotation . . . . . . . . . . . 20
5.8 Precisely align the coupling ................. 21
5.9 Aligning the motor ............................ 22
5.9.1 Aligning the motor using sets of shims .. . .. 22
5.9.2 Aligning the motor with adjusting
screws ........................................ 22
5.10 Installing the coupling guard ................ 22
6Operation ............................................ 23
6.1 Preparations for the initial start-up .. . . . . . . . . 23
6.1.1 Identifying the pump type .................... 23
6.1.2 Remove the preservative treatment ... . . . .. 23
6.1.3 Lubricating the bearings ..................... 23
6.1.4 Preparing auxiliary systems (if
available) ..................................... 24
6.1.5 Filling and bleeding .......................... 24
6.2 Start-up ....................................... 25
6.2.1 Switching on .................................. 25
6.2.2 Switching off .................................. 26
6.3 Shutting down ................................ 26
6.4 Start-up following a shutdown period ... .. .. 27
6.5 Running the stand-by pump ................. 27
7 Maintenance ......................................... 28
7.1 Inspections ................................... 28
7.2 Maintenance .................................. 28
7.2.1 Antifriction bearings lubricated with
grease ......................................... 28
7.2.2 Antifriction bearing with oil lubrication . . . . .. 28
7.2.3 Mechanical seals ............................. 29
7.2.4 Packing gland ................................ 29
7.2.5 Cleaning the pump ........................... 29
7.3 Disassembling ................................ 29
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Table of contents
7.3.1 Returning the pump to the manufac-
turer ........................................... 30
7.3.2 Preparations for disassembling ............. 30
7.4 Assembling the pump ........................ 30
7.5 Ordering replacement parts ................. 31
8 Troubleshooting .................................... 32
9 Appendix ............................................. 35
9.1 Sectional drawings ........................... 35
9.1.1 Auxiliary connections ........................ 35
9.1.2 Part numbers and designations ............. 35
9.1.3 Overview sectional drawing ................. 37
9.1.4 Variants ....................................... 39
9.1.5 Coupling guard ............................... 42
9.2 Technical specifications ...................... 43
9.2.1 Ambient conditions ........................... 43
9.2.2 Parameters for auxiliary systems .. . . .. . . . .. 43
9.2.3 Sound pressure level ........................ 44
9.2.4 Tightening torques ........................... 44
9.2.5 Lubricants ..................................... 45
9.2.6 Cleaning agents .............................. 45
9.2.7 Height offset to align the motor using
adjusting screw ............................... 46
9.2.8 Flange loads according to ISO 5199 . . . . .. . 47
9.3 Spare parts for 2 years of continuous
operation according to DIN 24296 . . . .. . . . .. 49
9.4 Declaration of harmlessness ................ 50
9.5 Declaration of conformity according to EC
Machine Directives ........................... 51
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Table of contents
List of figures
Fig. 1 Type plate (example) ........................ 10
Fig. 2 ATEX plate (example) ........................ 10
Fig. 3 Pump type code (example) .................. 10
Fig. 4 CNH-B construction (with oil
lubrication) .................................... 11
Fig. 5 Single mechanical seal with quenching
(sketch) ....................................... 12
Fig. 6 Double mechanical seal with external seal
barrier/buffer fluid reservoir (sketch) ........ 12
Fig. 7 Cooling the bearing housing ................ 13
Fig. 8 Cooling the shaft seal ........................ 13
Fig. 9 Heating the housing .......................... 13
Fig. 10 Fastening the lifting gear to the pump
aggregate ..................................... 14
Fig. 11 Attaching the lifting gear to the pump ....... 14
Fig. 12 Installation with foundation .................. 17
Fig. 13 Checking for distortion ....................... 17
Fig. 14 Installation without foundations .. . . .. . . . .. . . 18
Fig. 15 Straight pipe lengths upstream
and downstream of the pump
(recommended) .............................. 19
Fig. 16 Checking the alignment of the
coupling ....................................... 21
Fig. 17 Inspecting for lateral and vertical
misalignment ................................. 21
Fig. 18 Inspecting for angular misalignment .. . . .. . . 21
Fig. 19 Aligning the motor with adjusting
screws ........................................ 22
Fig. 20 Checking the oil level ........................ 23
Fig. 21 CNH-B with single mechanical seal . . . . . . . . 37
Fig. 22 Dust protection version in category 2D . . . . . 38
Fig. 23 CNH-B - version with intermediate ring .. . . . 39
Fig. 24 CNH-B - version with cooling of bearing
housing ....................................... 39
Fig. 25 CNH-B - version with axially-centered
feet ............................................ 39
Fig. 26 CNH-B – heating on both sides ............. 39
Fig. 27 Single mechanical seal and quenching .. . . . 40
Fig. 28 Two single mechanical seals in tandem
arrangement .................................. 40
Fig. 29 Double mechanical seal ..................... 41
Fig. 30 Cartridge mechanical seal for single or
double mechanical seals .................... 41
Fig. 31 Single mechanical seal with stationary spring
and quench ................................... 41
Fig. 32 Single mechanical seal with stationary spring
in tandem arrangement ...................... 42
Fig. 33 Coupling guard on base plate versions . . . . . 42
Fig. 34 Flange loads at the pump ................... 47
Fig. 35 Correction factor M and operating
temperature ................................... 48
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Table of contents
List of tables
Tab. 1 Target groups and their duties . .. . . . .. . .. . . . 6
Tab. 2 Other applicable documents and their
purpose ....................................... 6
Tab. 3 Warnings and consequences of disregarding
them ........................................... 7
Tab. 4 Symbols and their meaning ................. 7
Tab. 5 Technical terms and their meaning . . . . . . . . . 7
Tab. 6 Design characteristics ....................... 10
Tab. 7 Quenching - variants and characteris-
tics ............................................. 12
Tab. 8 Blocking - variants and characteristics .. .. . 12
Tab. 9 Treatment for storage ........................ 15
Tab. 10 Actions to be taken for pump
shutdowns .................................... 26
Tab. 11 Measures depending on nature of pumped
medium ....................................... 26
Tab. 12 Actions to be taken after prolonged shutdown
periods ........................................ 27
Tab. 13 Actions for return ............................. 30
Tab. 14 Fault number assignment ................... 32
Tab. 15 Troubleshooting list .......................... 34
Tab. 16 Abbreviations for the connection
names ......................................... 35
Tab. 17 Designations of components listed with part
numbers ...................................... 36
Tab. 18 Dimension A for KU-type mechanical seals
according to EN 12756 ...................... 40
Tab. 19 Dimension A for mechanical seals according
to EN 12756 .................................. 41
Tab. 20 Dimension A for mechanical seals according
to EN 12756 .................................. 42
Tab. 21 Ambient conditions ........................... 43
Tab. 22 Operating parameter for sealing medium in
open flow system . . . . . . . . .. .. .. .. . . . . . .. . . .. .. 43
Tab. 23 Required amount of sealing medium .. .. . . . 43
Tab. 24 Operating parameters for sealing
medium ....................................... 43
Tab. 25 Operating parameters for heating
chamber ...................................... 43
Tab. 26 Parameters for coolant ...................... 43
Tab. 27 Sound pressure level ........................ 44
Tab. 28 Tightening torques ........................... 44
Tab. 29 Minimum amounts for oil lubrication ........ 45
Tab. 30 Cleaning agents .............................. 45
Tab. 31 Height setting on the adjusting screw . . . . . . 46
Tab. 32 Flange loads .................................. 47
Tab. 33 Replacement parts for 2 years of continuous
operation ...................................... 49
Tab. 34 Declaration of harmlessness ............... 50
Tab. 35 Declaration of conformity according to EC
machine directives ........................... 51
145-353/0 – 550 115 BA-2017.02 en-US CNH-B series 5

About this document
1 About this document
This manual
• is part of the pump
• applies to the pump series mentioned above
• describes safe and appropriate operation at all operating
phases
1.1 Target groups
Target group Duty
Operating company Keep this manual available at the site of operation of the equipment,
including for later use.
Ensure that personnel read and follow the instructions in this
manual and the other applicable documents, especially all safety
information and warnings.
Observe any additional rules and regulations referring to the
installation.
Qualified personnel, fitter Read, observe and follow this manual and the other applicable
documents, especially all safety information and warnings.
Tab. 1 Target groups and their duties
1.2 Other applicable documents
Document Purpose
ATEX additional instructions Operation in explosion hazard areas
Order data sheet Technical specifications, conditions of operation
Setup drawing Setup dimensions, connection dimensions, etc.
Technical description Technical specifications, operating limits
Sectional drawing Sectional drawing, parts numbers, component designations
Supplier documentation Technical documentation for parts supplied by subcontractors
Replacement parts list Ordering replacement parts
Declaration of conformity Conformity with standards
Contents of the declaration of conformity (→9.5 Declaration of
conformity according to EC Machine Directives, Page 51).
Tab. 2 Other applicable documents and their purpose
6 CNH-B series BA-2017.02 en-US 145-353/0 – 550 115

About this document
1.3 Warnings and symbols
Warning Risk level Consequences of disregard
DANGER Immediate acute risk Death, serious bodily harm
Potential acute risk Death, serious bodily harm
CAUTION Potential hazardous situation Minor bodily harm
NOTE Potential hazardous situation Material damage
Tab. 3 Warnings and consequences of disregarding them
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
Requirement
→Cross reference
Information, advice
Tab. 4 Symbols and their meaning
1.4 Technical terms
Term Meaning
Sealing medium Medium as seal barrier/buffer fluid or for quenching of shaft seals
Auxiliary systems Systems for operating the pump
Tab. 5 Technical terms and their meaning
145-353/0 – 550 115 BA-2017.02 en-US CNH-B series 7

Safety
2 Safety
The manufacturer does not accept any liability for damage
resulting from disregard of the entire documentation.
2.1 Intended use
• Only use the pump for pumping the agreed pumped media
(→order data sheet).
• Adhere to the operating limits and size-dependent mini-
mum flow rate.
• Avoid dry running:
Damage, such as destruction of mechanical seal and plas-
tic parts, will occur within only a few seconds.
– Make certain that the pump is only operated with, and
never without a pumped medium.
• Avoid cavitation:
– Fully open the suction-side armature, do not use to
adjust the flow rate.
– Do not open the pressure-side armature beyond the
agreed operating point.
• Avoid overheating:
– Do not operate the pump while the pressure-side arma-
ture is closed.
– Note the minimum flow (→order data sheet).
• Avoid damage to the motor:
– Do not open the pressure-side armature 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 about any other use of the
pump.
• Pumps delivered without a motor must be assembled into
a pump unit according to the provisions of EC Machine
Directive 2006/42/EC.
Prevention of obvious misuse (examples)
• Note the operating limits of the pump concerning temper-
ature, pressure, flow rate and motor speed (→order data
sheet).
• The power consumed by the pump will increase with
increasing density of the pumped medium. To avoid
overloading the pump, coupling or motor, stay within the
agreed density (→order data sheet).
Lower densities are permissible. Adapt auxiliary systems
accordingly.
• When pumping liquids containing solids, ensure that the
limits for the proportion of solids and the grain size are
maintained (→order data sheet, technical description).
• When using auxiliary systems, ensure that there is a con-
tinuous supply of the appropriate medium.
• Pumps used with water as the pumped liquid must not be
used for foodstuffs or drinking water. Use of the pump for
foodstuffs or drinking water must be specified in the order
data sheet.
• Only select the setup type according to this operating man-
ual. For example, the following are not allowed:
– Hanging base plate pumps in the pipe
– Overhead installation
– Installation in the immediate vicinity of extreme heat or
cold sources
– Installation too close to the wall
2.2 General safety instructions
Take note of the following instructions before carrying out
any work.
2.2.1 Product safety
The pump has been constructed according to the latest tech-
nology and recognized technical safety rules. Nevertheless,
operation of the pump can involve risk to life and health of the
user or of third parties and risk of damage to the pump and
other property.
• Only operate the pump if it is in perfect technical condition,
only use it 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
expose personnel or third parties to any risk.
• Should there be any safety-relevant fault, shut down the
pump immediately and have the fault corrected by appro-
priate personnel.
• In addition to the entire documentation for the product,
always comply with statutory or other safety and acci-
dent-prevention rules and with the applicable standards
and guidelines in the country where the pump is operated.
8 CNH-B series BA-2017.02 en-US 145-353/0 – 550 115

Safety
2.2.2 Operator's obligations
Safety-conscious operation
• Only operate the pump if it is in perfect technical condition,
only use it 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:
– adherence to intended use
– statutory or other safety and accident-prevention rules
– safety regulations governing the handling of hazardous
substances
– applicable standards and guidelines in the country
where the pump is operated
• Make protective equipment available.
Qualified personnel
• Make certain that all personnel tasked with work on the
pump have read and understood this manual and all other
applicable documents, especially the safety, maintenance
and repair instructions, before they start work.
• Organize responsibilities, who is in charge of any specific
duty and how personnel is supervised.
• Ensure that all work is carried out by specialist technicians
only:
–fitting, repair and maintenance work
– work on the pump electrical system
• Make certain that trainee personnel is supervised by a spe-
cialist technician when working on the pump.
Safety equipment
• Provide the following safety equipment and verify their
functionality:
– for hot, cold and moving parts: protection from acci-
dental contact with the pump parts provided by cus-
tomer
– for possible build up of electrostatic charge: ensure
appropriate earthing
Warranty
• Obtain the manufacturer's approval prior to carrying out
any modification, repair or alterations during the warranty
period.
• Only use original parts or parts that have been approved
by the manufacturer.
2.2.3 Duties of the operating personnel
• All directions given on the pump must be followed (and kept
legible), e.g. the arrow indicating the direction 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
– Donotusethemasafixing point for winches or sup-
ports
– Do not use them for storing paper or similar materials
– Do not use hot pump or motor components as a heating
point
– Do not de-ice using gas burners or similar tools
• Do not remove the guards to prevent contact with hot, cold
or moving parts during operation.
• Use protective equipment if necessary.
• Only carry out work on the pump while it is not running.
• Isolate the motor from its supply voltage and keep it locked
in that state while carrying out any fitting or maintenance
work.
•Refit the safety installations on the pump properly, as
required by regulations, after completion of work on the
pump.
2.3 Special hazards
2.3.1 Explosion hazard area
•(→ATEX additional instructions).
2.3.2 Hazardous pumped media
• Follow the safety regulations for the handling of hazardous
substances when pumping hazardous media (e.g. hot,
flammable, poisonous or potentially harmful).
• Use protective equipment when carrying out any work on
the pump.
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Layout and function
3 Layout and function
3.1 Labels
3.1.1 Type plate
11
10
13
12 4
5
6
1
2
3
98 7
Fig. 1 Type plate (example)
1 Pump number
2Pumptypecode
3 Year of manufacture
4 Impeller diameter
5 Minimal efficiency index (MEI)
6Etaefficiency (—.- = not specified)
7 Pump NPSH value
8Density
9 Kinematic viscosity
10 Motor speed
11 Power consumption
12 Differential head
13 Flow rate
3.1.2 ATEX plate
Technical File No.:
EX9 03 09 45910 002
II 2 G c b Tx
1
2
Fig. 2 ATEX plate (example)
1 Explosion protection mark
2 Reference to ATEX additional instructions
3.1.3 Pump type code
1
2
3
4
CNH 32 - -200 W20-B
5
6
F
Fig. 3 Pump type code (example)
1 Pump series
2Version
3 Pressure flange DN [mm]
4 Impeller nominal diameter [mm]
5 Design characteristics (see following table)
6 Material key
Abbreviation Design characteristic
FSpecial flange
GMechanical seals
H Housing and housing cover can be heated
I Housing cover can be heated
KCooling the shaft seal
S Special version
Tab. 6 Design characteristics
10 CNH-B series BA-2017.02 en-US 145-353/0 – 550 115

Layout and function
3.2 Construction
123
45
6
Fig. 4 CNH-B construction (with oil lubrication)
1 Impeller
2 Volute casing
3 Bearing housing
4Shaft
5 Shaft seal
6 Limit for heat insulation
3.3 Shaft seals
Only one of the following shaft seals can be used.
3.3.1 Mechanical seals
Mechanical seals will always leak a bit, due to the way they
work.
• Single mechanical seal
• Single mechanical seal with quenching
• Double mechanical seal with external seal barrier/buffer
fluid reservoir (blocking)
3.3.2 Packing gland
The packing gland must always leak slightly to carry the
frictional heat away.
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Layout and function
3.4 Auxiliary systems
3.4.1 Sealing systems
Only one of the following sealing systems can be used.
Quenching
123
Fig. 5 Single mechanical seal with quenching
(sketch)
1 Pumped medium
2 Single mechanical seal
3 Sealing medium (unpressurized)
When quenching, the pressure of the transported medium
exceeds the pressure of the sealing medium. The seal sur-
faces are lubricated by the transported medium.
Application examples:
• Pumped media that can crystallize in the atmosphere and
thus cause damage to the seal in the long-term
• Preventionofoffensiveodors
• Cooling seals
Variant Characteristics of the
sealing medium
Open flow system • supplied and drained
continuously
• unpressurized
Closed flow system • Circulates in a closed
circuit
• unpressurized
Tab. 7 Quenching - variants and characteristics
Blocking
21 3
Fig. 6 Double mechanical seal with external seal
barrier/buffer fluid reservoir
(sketch)
1 Pumped medium
2 Double mechanical seal
3 Sealing medium (pressurized)
When using seal barrier/buffer fluids, the pressure of the seal-
ing medium exceeds the pressure of the pumped medium. The
seal surfaces are lubricated by the sealing medium.
Application examples:
• Pumped media that can crystallize or carry solids, causing
damage to the seal in the long-term
• Toxic pumped media
• Pumped media presenting an environmental hazard
Variant Characteristics of the
sealing medium
Open flow system • supplied and drained
continuously
• pressurized
Closed flow system • Circulates in a closed
circuit
• pressurized
Tab. 8 Blocking - variants and characteristics
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Layout and function
3.4.2 Cooling the bearing housing
Fig. 7 Cooling the bearing housing
If the temperature of the medium being pumped >200 °C,
cool the bearing housing.
3.4.3 Cooling the shaft seal
Fig. 8 Cooling the shaft seal
3.4.4 Heating the housing
Fig. 9 Heating the housing
145-353/0 – 550 115 BA-2017.02 en-US CNH-B series 13

Transport, storage and disposal
4 Transport, storage and
disposal
4.1 Transport
For details of weight (→documents for the particular
order).
4.1.1 Unpacking and inspection on delivery
1. Unpack the pump/aggregate on delivery and inspect for
damage.
2. Report any damage to the manufacturer immediately.
3. Dispose of packaging material according to local regula-
tions.
4.1.2 Lifting
DANGER
Death or crushing of limbs caused by falling loads!
Use lifting gear appropriate for the total weight to be trans-
ported.
Fasten the lifting gear as shown in the illustrations below.
Never fasten the lifting gear onto the motor eyebolt (unless
used as a safety device against tipping over for units with
ahighcenterofgravity).
Do not stand under suspended loads.
Fig. 10 Fastening the lifting gear to the pump aggregate
Fig. 11 Attaching the lifting gear to the pump
Lift the pump/aggregate properly.
14 CNH-B series BA-2017.02 en-US 145-353/0 – 550 115

Transport, storage and disposal
4.2 Preservation
This is not necessary for non-rusting materials.
Contact the manufacturer for recommendations regarding
preservatives.
NOTE
Material damage due to inappropriate treatment for stor-
age!
Treat the pump properly, inside and out, for storage.
Preserving pump (observe the processing specifications of
the manufacturers)
Duration
[months]
Measures
Up to 6 All bare metal parts should be treated,
inside and outside.
6–12 All bare metal parts should be treated,
inside and outside.
Shrink-wrap the pump in plastic film.
12–24 All bare metal parts should be treated,
inside and outside.
Shrink-wrap the pump in plastic film.
Use VCI anticorrosive.
Tab. 9 Treatment for storage
4.3 Storage
NOTE
Material damage due to inappropriate storage.
Treat and store the pump properly.
1. Seal all openings with blind flanges, blind plugs or plastic
covers.
2. For models with oil-lubricated bearings and downtimes in
excess of one year:
– Remove reservoir
– Remove the connecting piece for the oil level regulator
– Seal the threaded hole
– Fill the bearing housing with oil, up to the brim
– Seal the bleed hole
3. Make certain that the storage room meets the following
conditions:
–dry
– frost-free
– vibration-free
4. Turn the shaft once a month.
5. Make certain that the shaft and the bearing change their
rotational position in the process.
4.4 Remove the preservative treatment
Only necessary for pumps treated with preservative.
WARNING
Risk of poisoning from preservative and cleaning agents
in the area of foods and drinking water.
Only use cleaning agents which are compatible with the
pumped liquid (→9.2.6 Cleaning agents, Page 45).
Completely remove all preservative agents.
NOTE
High water pressure or spray water can damage bearings!
Do not clean the bearing area with a water or steam jet.
NOTE
Damage to seals through incorrect cleaning agent!
Ensure that the cleaning agent will not attack the seals.
1. Choose a suitable cleaning agent for the application.
(→9.2.6 Cleaning agents, Page 45).
2. Dispose of preservative agent according to local regula-
tions.
3. For storage times in excess of 6 months:
– Replace the elastomers made from EP rubber (EPDM).
– Check all elastomer parts (O-rings, shaft seals) for
proper elasticity and replace if needed.
4.5 Disposal
Plastic parts can be contaminated by poisonous or radioac-
tivepumpedmediatosuchanextentthatcleaningwillbe
insufficient.
WARNING
Risk of poisoning and environmental damage caused by
pumped medium or oil!
Use protective equipment when carrying out any work on
the pump.
Prior to disposal of the pump:
– Catch and dispose of any medium or oil which runs out
in accordance with local regulations.
– Neutralize residues of pumped medium in the pump.
– Remove any preservative treatment (→4.4 Remove
the preservative treatment, Page 15).
Remove and dispose of any plastic parts in accordance
with local regulations.
Dispose of pump according in accordance with local regu-
lations.
145-353/0 – 550 115 BA-2017.02 en-US CNH-B series 15

Setup and connection
5 Setup and connection
For pumps in areas at risk of explosion (→ATEX additional
instructions).
NOTE
Material damage due to distortion or passage of electrical
current in the bearing!
Do not make any structural modifications to the pump unit
or pump casing.
Do not carry out any welding work on the pump unit or
pump casing.
NOTE
Material damage caused by dirt!
Do not remove transport seals until immediately before set-
ting up the pump.
Do not remove covers and transport and sealing covers
until immediately before connecting the piping to the pump.
5.1 Preparing the setup
5.1.1 Checking the ambient conditions
Make certain that the required ambient conditions are ful-
filled(→9.2.1 Ambient conditions, Page 43).
5.1.2 Preparing the site for the installation
Ensure that the site meets the following conditions:
– pump is freely accessible from all sides
–sufficient space for installation/removal of the pipes
and for maintenance and repair work, especially for the
removal and installation of the pump and the motor
– pump not exposed to external vibrations (damage to
bearings)
– frost protection
5.1.3 Preparing the foundations and installation surface
Installation options:
– with concrete foundations
– with steel foundation frame
– without foundations
Make certain that the foundations and installation surface
meet the following conditions:
–levelsurf
ace
– clean (no oil, dust or other impurities)
– foundations and surface can support the weight of the
pump aggregate and all operating forces
– ensure that the pump is stable and cannot tip over
– for concrete foundations: standard concrete of
strength class B 25
5.1.4 Remove the preservative treatment
If the pump is to be put into operation immediately
after installation and connection: Remove the preser-
vative treatment before installing (→4.4 Remove the
preservative treatment, Page 15).
5.1.5 Installing the heat insulation (optional)
Only necessary to maintain the temperature of the pumped
medium.
NOTE
Material damage on the bearing or shaft seal due to over-
heating!
Only install the heat insulation on the volute casing
(→Figure CNH-B construction (with oil lubrication),
Page 11).
Install the heat insulation properly.
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Setup and connection
5.2 Installing with foundations
NOTE
Material damage due to distortion of base plate
Place and fasten the base plate on the foundations as
described in the following.
5.2.1 Setting the pump aggregate on the foundation
Implements, tools and materials:
– foundation bolts (→installation drawing)
– steel washers
– non-shrinking mortar/concrete
– spirit level
1. Lift the pump aggregate (→4.1 Transport, Page 14).
2. Working from below, locate the foundation bolts in the base
plate fixing holes.
Follow the manufacturer's instruction when using adhesive
anchors.
3. Set the pump aggregate down onto the foundation. When
doing this, sink the foundation bolts into the prepared
anchoring holes.
32 1 2
Fig. 12 Installation with foundation
4. Use steel washers to align the pump to the height and sys-
tem dimensions as described in the following:
– Next to each foundation bolt (1) place a steel washer
(2) to the left and to the right.
– If the spacing between the fixing holes > 750 mm, place
additional steel washers (3) in the middle, on each side
ofthebaseplate.
5. Make certain that the steel washers lie flat against the base
plate, in full contact.
6. Use the integrated spirit levels to check that the pump is
level end to end and side to side with max. 1mm/m allow-
able tilt.
7. Repeat procedure until the base plate is correctly aligned.
5.2.2 Fixing the pump aggregate
Filling out the base plate with mortar grout will improve the
damping behavior.
1. Fill the anchoring holes with mortar grout.
2. When the mortar grout has set, screw down the base plate
at three points with the specified torque.
3. Before tightening the remaining bolts, compensate for any
unevenness in the surface, using metal spacing shims next
to each bolt.
4. Check the pump aggregate for any distortion, using a
straightedge:
1
Fig. 13 Checking for distortion
– Checkintwoplanesatanangleof90°tooneotheron
the circumference of the coupling.
– Check at the outer diameter using a straightedge (1):
Position the straightedge across both halves of the
coupling.
If there is a significant deviation, loosen the fixings to
thebaseplateandcorrectthedistortionbyinserting
more shims.
– Fill the inside of the base plate with concrete, if applica-
ble. Knock on the base plate to ensure that no cavities
are created in the process.
Couplings with a spacer piece (dismountable coupling) can
also be checked with a dial gauge.
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Setup and connection
5.3 Installation without foundation
This is only permissible if the pump is intended for installa-
tion without a foundation (→order data sheet).
Implements, tools and materials:
–Wrench
– Spirit level
1
1
1
1
2
4
5
3
Fig. 14 Installation without foundations
1. Lift the pump unit (→4.1.2 Lifting, Page 14).
2. Install four leveling feet (1) as shown.
– Do not forget the washer (3) under the base plate.
3. Set the pump aggregate down on the surface.
4. Use the adjustable feet (1) to adjust the height of the base
plate as shown above:
– Use a wrench (4) to hold the hex nut steady on the
leveling foot (5).
– Loosen the hex nut (2).
– Adjust the height by turning the hex nut (4).
– Tighten the hexagon nut (2) (→9.2.4 Tightening
torques, Page 44).
– Use the integrated spirit level to check whether the
pump is level end to end and side to side with a maxi-
mum allowable tilt of 1 mm/m.
– Repeat the procedure until the base plate is correctly
aligned.
5.4 Mounting the motor
Only necessary if the pump aggregate is assembled on
site.
NOTE
Material damage caused by knocks and bumps!
Keep the coupling halves properly aligned when pushing
on the motor.
Do not knock or hit any component of the pump.
1. Smear a very thin coat of molybdenum disulfite (e.g.
Molykote) on the shaft ends of the pump and motor.
2. Insert shaft keys.
3. Without a mounting rig: Remove rubber buffers and warm
up both halves of the coupling to approx. 100 °C.
4. Slideonthepump-sideandmotor-sidecouplinghalves
until the shaft ends and the center of the coupling are flush
with one other. When doing this, ensure that the prescribed
spacing between the two halves of the coupling is main-
tained (→assembly instructions for the coupling).
5. Tighten the grub screws on both halves of the coupling.
6. Use suitable metal shims under the motor to align the end
of the motor shaft to the end of the pump shaft.
7. Fit the motor bolts, but do not tighten them yet
(→5.9 Aligning the motor, Page 22).
5.5 Planning the piping
5.5.1 Specifying supports and flange connections
NOTE
Material damage due to excessive forces and torque,
exerted by the piping, on the pump.
Do not exceed permissible limits (→9.2.8 Flange loads
according to ISO 5199, Page 47).
1. Calculate pipe forces taking every possible operating con-
dition into account:
– cold/warm
– empty/full
– unpressurized/pressurized
– shift in position of flanges
2. Ensure that pipe supports have permanent low-friction
properties and will not seize up through corrosion.
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Setup and connection
5.5.2 Specifying nominal diameters
Keep the flow resistance in the pipes as low as possible.
1. Where possible, make sure the nominal suction pipe diam-
eter is ≥as possible to the nominal suction flange diameter.
– Recommended flowratespeed<1m/s
2. Make sure the nominal pressure pipe diameter is ≥as pos-
sible to the nominal pressure flange diameter.
– Recommended flowratespeed<3m/s
5.5.3 Specifying pipe lengths
C
D
B
A
Fig. 15 Straight pipe lengths upstream and downstream
of the pump (recommended)
A > 5x suction pipe nominal diameter
B suction pipe nominal diameter
C pressure pipe nominal diameter
D > 5x pressure pipe nominal diameter
Maintain recommended minimum values when installing
the pump.
Suction side: shorter pipes are possible but can restrict
hydraulic performance.
Pressure side: shorter pipes are possible but can lead to
increased operating noise.
5.5.4 Optimizing cross-section and direction changes
1. Avoid bending radii of less than 1.5 times the nominal pipe
diameter.
2. Avoid abrupt changes of cross-section along the piping
system.
5.5.5 Discharging leaks
WARNING
Risk of injury and poisoning due to hazardous pumped
liquids!
Safely collect any leaking pumped liquid, then discharge
and dispose of it in accordance with environmental regula-
tions.
1. Provide equipment for collecting and discharging leaking
liquids.
2. Ensure the free discharge of leaking liquids.
5.5.6 Providing safety and control devices
(recommended)
Avoid contamination
1. Integrate filter into the suction pipe.
2. To monitor contamination, fit a differential pressure gauge
with a contact manometer.
Avoid reverse running
Install a non return valve between the pressure flange and
the gate valve to ensure that the medium will not flow back
whenthepumpisswitchedoff.
Make provisions for isolating and shutting off the pipes
For maintenance and repair work.
Provide shut-off devices in the suction and pressure pipes.
Allow the measurement of the operating conditions
1. Provide manometers for pressure measurements in suc-
tion and pressure pipes.
2. Provide load monitors (overload and underload) on the
motor side.
3. Provide for pump-side temperature measurement.
5.6 Connecting the pipes
5.6.1 Keep the piping clean
NOTE
Material damage due to impurities in the pump!
Make certain that no impurities can get into the pump.
1. Clean all piping components and armatures prior to assem-
bly.
2. Ensure that no flange gaskets protrude inwards.
3. Remove blind flanges, plugs, protective foils and/or protec-
tive paint on flanges.
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Setup and connection
5.6.2 Installing auxiliary piping
Follow manufacturers' specifications for any existing auxil-
iary systems.
1. Install the auxiliary pipes so that they are stress-free and
don't leak, to the auxiliary connections (→installation draw-
ing).
2. To avoid air pockets: run pipes with a continuous slope up
to the pump.
5.6.3 Installing the suction pipe
1. Remove transport and sealing covers from the pump.
2. To avoid air pockets: run pipes with a continuous slope up
to the pump.
3. Ensure that no gaskets protrude inwards.
4. For suction operation: Install a foot valve in the suction line
to prevent the pump and suction pipe from running empty
during downtime.
5.6.4 Installing the pressure pipe
1. Remove transport and sealing covers from the pump.
2. Install the pressure pipe.
3. Ensure that no gaskets protrude inwards.
5.6.5 Inspection for stress-free pipe connections
Piping complete and cooled down
NOTE
Material damage due to distorted pump casing
Ensure that all pipes are stress relieved when connected
to the pump.
1. Separate the pipe connecting flanges from the pump.
2. Check that pipes can move freely in all directions within the
expected range of expansion:
– Nominal diameter < 150 mm : by hand
– Nominal diameter > 150 mm : with short lever
3. Make certain that the flange surfaces are parallel.
4. Reconnect the pipe flanges to the pump.
5.6.6 Inspecting the support foot (183.1) for distortion
1. Loosen the bolts connecting the support foot to the base
plate.
2. If the support foot moves, compensate for distortion:
– lateral shift: by means of slotted holes
– height shift: by means of metal shims
3. Tighten the support foot bolts to the base plate, making cer-
tain that the bearing bracket is not distorted in the process.
5.7 Electrical connection
DANGER
Risk of death through electric shock!
Have all electrical work carried out by qualified electricians
only.
DANGER
Risk of death due to rotating parts!
Isolate the motor from its supply voltage and keep it locked
in that state while carrying out any fitting or maintenance
work.
5.7.1 Connecting the motor
Follow the instructions of the motor manufacturer.
1. Connect the motor according to the connection diagram.
2. Make sure that no danger arises due to electrical energy.
3. Install an EMERGENCY STOP switch.
5.7.2 Checking the direction of rotation
DANGER
Risk of death due to rotating parts!
Use protective equipment when carrying out any work on
the pump.
Secure the shaft key from being thrown out when checking
the direction of rotation.
Keep adequate distance to rotating parts.
NOTE
Material damage caused by running dry or wrong direction
of rotation!
Uncouple the motor from the pump.
1. Switch motor on and immediately off again.
2. Check that the direction of rotation of the motor corre-
sponds to the rotational direction arrow on the pump.
3. If the direction of rotation is different: swap two phases.
4. Couple the motor to the pump.
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