Pfeiffer Vacuum HENA 201 User manual

OPERATING INSTRUCTIONS
EN
Translation of the Original
HENA 201 | 251 | 301 | 301 S
Rotary vane pump

Dear Customer,
Thank you for choosing a Pfeiffer Vacuum product. Your new rotary vane pump is designed
to support you by its performance, its perfect operation and without interfering your individual
application. The name Pfeiffer Vacuum stands for high-quality vacuum technology, a
comprehensive and complete range of top-quality products and first-class service. With this
expertise, we have acquired a multitude of skills contributing to an efficient and secure
implementation of our product.
Knowing that our product must not interfere with your actual work, we are convinced that our
product offers you the solution that supports you in the effective and trouble-free execution of
your individual application.
Please read these operating instructions before putting your product into operation for the
first time. If you have any questions or suggestions, please feel free to contact info@pfeiffer-
vacuum.de.
Further operating instructions from Pfeiffer Vacuum can be found in the Download Center on
our website.
Disclaimer of liability
These operating instructions describe all models and variants of your product. Note that your
product may not be equipped with all features described in this document. Pfeiffer Vacuum
constantly adapts its products to the latest state of the art without prior notice. Please take
into account that online operating instructions can deviate from the printed operating
instructions supplied with your product.
Furthermore, Pfeiffer Vacuum assumes no responsibility or liability for damage resulting from
the use of the product that contradicts its proper use or is explicitly defined as foreseeable
misuse.
Copyright
This document is the intellectual property of Pfeiffer Vacuum and all contents of this
document are protected by copyright. They may not be copied, altered, reproduced or
published without the prior written permission of Pfeiffer Vacuum.
We reserve the right to make changes to the technical data and information in this document.
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Table of contents
1 About this manual 7
1.1 Validity 7
1.1.1 Applicable documents 7
1.1.2 Variants 7
1.2 Target group 7
1.3 Conventions 7
1.3.1 Instructions in the text 7
1.3.2 Pictographs 8
1.3.3 Stickers on the product 8
1.3.4 Abbreviations 9
1.4 Trademark proof 9
2 Safety 10
2.1 General safety instructions 10
2.2 Safety instructions 10
2.3 Safety precautions 13
2.4 Limits of use of the product 14
2.5 Proper use 14
2.6 Foreseeable improper use 14
2.7 Personnel qualification 14
2.7.1 Ensuring personnel qualification 15
2.7.2 Personnel qualification for maintenance and repair 15
2.7.3 Advanced training with Pfeiffer Vacuum 15
3 Product description 16
3.1 Function 16
3.1.1 Operating fluid 16
3.1.2 Operating fluid return via the float valve 17
3.1.3 Cooling 17
3.1.4 Gas ballast 17
3.2 Identifying the product 17
3.3 Product features 17
3.4 Scope of delivery 17
4 Transportation and Storage 18
4.1 Transporting the vacuum pump 18
4.2 Storing the vacuum pump 19
5 Installation 20
5.1 Installing the vacuum pump 20
5.2 Connecting the vacuum side 20
5.3 Connecting the exhaust side 21
5.4 Filling the operating fluid 21
5.5 Connect the oil/water heat exchanger 22
5.6 Establishing mains connection 24
5.6.1 Connect three phase motor with 12-pin terminal board 24
5.6.2 Connect three phase motor with 6-pin terminal board 25
5.6.3 Frequency inverter for vacuum pumps with 3-phase motor 25
5.6.4 Checking the direction of rotation 26
5.6.5 Setting the motor protection switch 26
5.6.6 Connecting the PTC thermistor tripping unit 27
6 Operation 28
6.1 Putting the vacuum pump into operation 28
6.2 Switching on the vacuum pump 28
6.3 Operating the rotary vane pump with gas ballast 29
6.4 Refilling operating fluid 30
Table of contents
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6.5 Switching off the vacuum pump 31
7 Maintenance 32
7.1 Maintenance instructions 32
7.2 Checklist for inspection and maintenance 32
7.3 Changing the operating fluid 34
7.3.1 Determine degree of aging of P3 operating fluid 34
7.3.2 Changing the operating fluid 35
7.3.3 Rinsing and cleaning the rotary vane vacuum pump 36
7.3.4 Changing the operating fluid filter 37
7.4 Change the exhaust filter in the operating fluid separator 37
7.4.1 Dismantling the exhaust filters 38
7.4.2 Mounting the exhaust filters 39
7.5 Cleaning the intake strainer 40
7.6 Cleaning the gas ballast filter 40
7.7 Changing the operating fluid type 41
8 Decommissioning 42
8.1 Shutting down for longer periods 42
8.2 Recommissioning 42
8.3 Disposing of the vacuum pump 42
9 Malfunctions 43
10 Service solutions from Pfeiffer Vacuum 45
11 Spare parts 47
11.1 Ordering spare parts packs 47
11.2 Operating fluids – Maintenance level 1 47
11.3 Maintenance kit – maintenance level 2 47
11.4 Overhaul kit – maintenance level 3 48
11.5 Set of seals 48
11.6 Set of vanes 48
11.7 Coupling set 48
12 Accessories 49
12.1 Accessory information 49
12.2 Ordering accessories 49
13 Technical data and dimensions 50
13.1 General 50
13.2 Technical data 50
13.3 Dimensions 52
Declaration of conformity 58
Table of contents
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List of tables
Tbl. 1: Stickers on the product 8
Tbl. 2: Abbreviations used in this document 9
Tbl. 3: Limits of use of the product 14
Tbl. 4: Features of the rotary vane pumps 17
Tbl. 5: Requirements on the cooling water composition 23
Tbl. 6: Motor protection switch setting values for Hena 201 (from index "A") 26
Tbl. 7: Motor protection switch setting values for Hena 251 | Hena 301 (from index
"A")
26
Tbl. 8: Maintenance intervals 33
Tbl. 9: Troubleshooting for rotary vane pumps 44
Tbl. 10: Spare parts packages Hena 201 47
Tbl. 11: Spare parts packages Hena 251 | Hena 301 | Hena 301 S 47
Tbl. 12: Consumables 47
Tbl. 13: Accessories 49
Tbl. 14: Consumables 49
Tbl. 15: Conversion table: Pressure units 50
Tbl. 16: Conversion table: Units for gas throughput 50
Tbl. 17: Technical data Hena 201 | Hena 251 51
Tbl. 18: Technical data Hena 301 | Hena 301 S 52
List of tables
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List of figures
Fig. 1: Position of the stickers on the product 8
Fig. 2: Operating principle 16
Fig. 3: Structure of the rotary vane pump 16
Fig. 4: Transporting the vacuum pump 18
Fig. 5: Minimum distances to the lateral limitations (top view) 20
Fig. 6: Filling the operating fluid 22
Fig. 7: Cooling water connection 23
Fig. 8: Double star circuit 24
Fig. 9: Delta connection 24
Fig. 10: Star circuit 25
Fig. 11: Delta connection 25
Fig. 12: Star circuit 25
Fig. 13: Connection example with PTC thermistor tripping unit 27
Fig. 14: Gas ballast valve 30
Fig. 15: Refilling operating fluid 30
Fig. 16: Draining the operating fluid 36
Fig. 17: Changing the operating fluid filter 37
Fig. 18: Dismantling the exhaust filters 38
Fig. 19: Mounting the exhaust filters 39
Fig. 20: Dismantling / assembling the intake strainer 40
Fig. 21: Cleaning the gas ballast filter 41
Fig. 22: Dimensions Hena 201 | Three phase motor IE3 53
Fig. 23: Dimensions Hena 251 | Three phase motor IE3 54
Fig. 24: Dimensions Hena 301 | Three phase motor IE3 55
Fig. 25: Dimensions Hena 301 | Three phase motor IE3 and oil/water heat exchang-
er
56
Fig. 26: Dimensions Hena 301 S | Three phase motor IE3 57
List of figures
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1 About this manual
IMPORTANT
Read carefully before use.
Keep the manual for future consultation.
1.1 Validity
These operating instructions are for customers of Pfeiffer Vacuum. They describe the function of the
designated product and provide the most important information for safe usage of the product. The de-
scriptions comply with applicable directives. All information provided in these operating instructions refer
to the current development status of the product. The documentation remains valid as long as the cus-
tomer does not modify the product in any way.
1.1.1 Applicable documents
Document Number
Declaration of conformity A component of these instructions
You can find this document in the Pfeiffer Vacuum Download Center.
1.1.2 Variants
These instructions apply to HenaLine vacuum pumps.
Pump type Pump version
Hena 201 Standard version of rotary vane pump
Hena 251 Standard version of rotary vane pump
Hena 301 Standard version of rotary vane pump
Rotary vane pump with water cooling
Hena 301 S Rotary vane pump with limited intake pressure
1.2 Target group
These operating instructions are aimed at all persons performing the following activities on the product:
●Transportation
●Setup (Installation)
●Usage and operation
●Decommissioning
●Maintenance and cleaning
●Storage or disposal
The work described in this document is only permitted to be performed by persons with the appropriate
technical qualifications (expert personnel) or who have received the relevant training from Pfeiffer Vac-
uum.
1.3 Conventions
1.3.1 Instructions in the text
Usage instructions in the document follow a general structure that is complete in itself. The required ac-
tion is indicated by an individual step or multi-part action steps.
Individual action step
A horizontal, solid triangle indicates the only step in an action.
►This is an individual action step.
About this manual
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Sequence of multi-part action steps
The numerical list indicates an action with multiple necessary steps.
1. Step 1
2. Step 2
3. ...
1.3.2 Pictographs
Pictographs used in the document indicate useful information.
Note
Tip
1.3.3 Stickers on the product
This section describes all the stickers on the product along with their meaning.
D-35614 Asslar
Mod.
P/N
S/N
Hena 201
PK D03 455 A
xxxxxxxxx
Made in Switzerland 2019/08
Oil
S (N )
n
Mass
2
P3 6.5 l
max. 360.0 m /h
max. 1800 1/min
227.0 kg
3
Rating plate (example)
Rating plate of the rotary vane vacuum pump
Motor rating plate (not shown)
Warning hot surface
This sticker warns of injuries caused by high temperatures in case of touching
without protection during operation.
Operating instructions note
This sticker indicates that this operating instructions must be read before per-
forming any tasks.
Arrow indicating direction of rotation
The direction of rotation arrow indicates the required motor rotation direction.
Tbl. 1: Stickers on the product
12 3 4
Fig. 1: Position of the stickers on the product
1 Rating plate of the rotary vane vacuum pump 3 Operating instructions note
2 Hot surface warning sign 4 Arrow indicating direction of rotation
About this manual
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1.3.4 Abbreviations
Abbreviation Meaning in this document
BA Operating instructions
ID Internal diameter
IE3 Efficiency of the electric motors (premium efficiency class)
N.N. Mean sea level
PE Earthed conductor (protective earth)
PTC Temperature-dependent resistor (positive temperature coefficient)
PVC Polyvinyl chloride (PVC)
WAF width across flats
RSSR Radial shaft seal ring
MM Maintenance manual
Tbl. 2: Abbreviations used in this document
1.4 Trademark proof
●Loctite® is a trademark of HENKEL IP & HOLDING GMBH.
About this manual
9/60

2 Safety
2.1 General safety instructions
This document includes the following 4 risk levels and 1 information level.
DANGER
Imminent danger
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
►Instructions on avoiding the hazardous situation
WARNING
Possibly imminent danger
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
►Instructions on avoiding the hazardous situation
CAUTION
Possibly imminent danger
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
►Instructions on avoiding the hazardous situation
NOTICE
Danger of property damage
Notice is used to address practices not related to physical injury.
►Instructions on avoiding property damage
Notes, tips or examples indicate important information on the product or on this document.
2.2 Safety instructions
All safety instructions in this document are based on the results of the risk assessment carried out in
accordance with Machinery Directive 2006/42/EC Annex I and DIN EN ISO 12100 Section 5. Where ap-
plicable, all life cycle phases of the product were taken into account.
Risks during transport
WARNING
Risk of serious injury from swinging, toppling or falling objects
During transport, there is a risk of crushing and impact on swinging, toppling or falling objects. There
is a risk of injuries to limbs, up to and including bone fractures and head injuries.
►Secure the danger zone if necessary.
►Pay attention to the center of gravity of the load during transport.
►Ensure even movements and moderate speeds.
►Observe safe handling of the transport devices.
►Avoid sloping attachment aids.
►Never stack products.
►Wear protective equipment, e.g. safety shoes.
Safety
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Risks during installation
DANGER
Danger to life from electric shock
Contact with exposed and live elements generate an electric shock. Incorrect connection of the mains
supply leads to the risk of live housing parts that can be touched. There is a risk to life.
►Before the installation, check that the connection leads are voltage-free.
►Make sure that electrical installations are only carried out by qualified electricians.
►Provide adequate grounding for the device.
►After connection work, do a PE conductor check.
CAUTION
Danger of injury from moving parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. There
is a risk of injury to fingers and hands if they enter the operating range of rotating parts.
►Safely disconnect motor from the mains.
►Secure the motor against reactivation.
►Dismantle the vacuum pump for inspection, away from the system if necessary.
Risks during operation
WARNING
Danger of poisoning due to toxic process media escaping from the exhaust pipe
During operation with no exhaust line, the vacuum pump allows exhaust gases and vapors to escape
freely into the air. There is a risk of injury and fatality due to poisoning in processes with toxic process
media.
►Observe the pertinent regulations for handling toxic process media.
►Safely purge toxic process media via an exhaust line.
►Use appropriate filter equipment to separate toxic process media.
WARNING
Risk of burns from ejected hot oil mist
During operation, hot pressurized oil mist escapes from the operating fluid separator.
►Only operate the vacuum pump with the filler screw securely fitted.
►Open the locking screws on the separator only while the vacuum pump is switched off.
CAUTION
Risk of injury from suction of body parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically.
There is a risk of minor injuries to fingers and hands (e.g. hematoma) from direct contact with the
vacuum flange.
►Maintain sufficient distance to the vacuum flange during all work.
►Safely disconnect motor from the mains.
►Secure the motor against re-start.
CAUTION
Danger of injury from bursting as a result of high pressure in the exhaust line
Faulty or inadequate exhaust pipes lead to dangerous situations, e.g. increased exhaust pressure.
There is a danger of bursting. Injuries caused by flying fragments, the escaping of high pressure, and
damage to the unit cannot be excluded.
►Route the exhaust line without shut-off units.
►Observe the permissible pressures and pressure differentials for the product.
►Check the function of the exhaust line on a regular basis.
Safety
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CAUTION
Danger of burns on hot surfaces
Depending on the operating and ambient conditions, the surface temperature of the vacuum pump
can increase to above 70 °C.
►Provide suitable touch protection.
Risks during maintenance, decommissioning and malfunctions
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
►Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
►Decontaminate affected parts before carrying out maintenance work.
►Wear protective equipment.
WARNING
Danger to life from electric shock in the event of a fault
In the event of a fault, devices connected to the mains may be live. There is a danger to life from
electric shock when making contact with live components.
►Always keep the mains connection freely accessible so you can disconnect it at any time.
WARNING
Health hazard and risk of environmental damage from toxic contaminated operating fluid
Toxic process media can cause operating fluid contamination. When changing the operating fluid,
there is a health hazard due to contact with poisonous substances. Illegal disposal of toxic substan-
ces causes environmental damage.
►Wear suitable personal protective equipment when handling these media.
►Dispose of the operating fluid according to locally applicable regulations.
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
►Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
►Decontaminate affected parts before carrying out maintenance work.
►Wear protective equipment.
CAUTION
Risk of injury from suction of body parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically.
There is a risk of minor injuries to fingers and hands (e.g. hematoma) from direct contact with the
vacuum flange.
►Maintain sufficient distance to the vacuum flange during all work.
►Safely disconnect motor from the mains.
►Secure the motor against re-start.
Safety
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CAUTION
Scalding from hot operating fluid
Danger of burns when draining operating fluid if it comes into contact with the skin.
►Wear protective equipment.
►Use a suitable collection vessel.
CAUTION
Danger of burns on hot surfaces
In the event of a fault, the surface temperature of the vacuum pump can increase to above 105 °C.
►Allow the vacuum pump to cool down before carrying out any work.
►Wear personal protective equipment if necessary.
CAUTION
Danger of injury from moving parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. There
is a risk of injury to fingers and hands if they enter the operating range of rotating parts.
►Safely disconnect motor from the mains.
►Secure the motor against reactivation.
►Dismantle the vacuum pump for inspection, away from the system if necessary.
2.3 Safety precautions
Duty to provide information on potential dangers
The product holder or user is obliged to make all operating personnel aware of dangers
posed by this product.
Every person who is involved in the installation, operation or maintenance of the product
must read, understand and adhere to the safety-related parts of this document.
Infringement of conformity due to modifications to the product
The Declaration of Conformity from the manufacturer is no longer valid if the operator
changes the original product or installs additional equipment.
●Following the installation into a system, the operator is required to check and re-evalu-
ate the conformity of the overall system in the context of the relevant European Direc-
tives, before commissioning that system.
General safety precautions when handling the product
►Observe all applicable safety and accident prevention regulations.
►Check that all safety measures are observed at regular intervals.
►Do not expose body parts to the vacuum.
►Always ensure a secure connection to the earthed conductor (PE).
►Never disconnect plug connections during operation.
►Observe the above shutdown procedures.
►Keep lines and cables away from hot surfaces (> 70 °C).
►Never fill or operate the unit with cleaning agents or cleaning agent residues.
►Do not carry out your own conversions or modifications on the unit.
►Observe the unit protection class prior to installation or operation in other environments.
►Provide suitable touch protection, if the surface temperature exceeds 70 °C.
Safety
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2.4 Limits of use of the product
Parameter Hena 201, Hena 251,
Hena 301
Hena 301 S
Installation location ● Indoors, protected from
dust deposits
● Outdoors, protected from
direct weather influences
● Indoors, protected from
dust deposits
● Outdoors, protected from
direct weather influences
Installation altitude max. 1000 m above sea level max. 1000 m above sea level
Orientation horizontal horizontal
permissible angle of inclination ±1 ° ±1 °
Ambient temperature +12 °C to +40 °C +12 °C to +40 °C
Relative air humidity max. 85 % max. 85 %
Pumped medium intake tempera-
ture, max. +80 °C +80 °C
Permissible operating pressure
range during continuous operation < 800 hPa ≤ 100 hPa
Exhaust pressure Atmospheric pressure Atmospheric pressure
Tbl. 3: Limits of use of the product
2.5 Proper use
►Use the vacuum pump for vacuum generation only.
►When pumping media with an oxygen concentration level of ≥ 21 %, only use perfluorinated, syn-
thetic oils (F4, F5, A113) as operating fluid.
►Adhere to the installation, commissioning, operating, and maintenance instructions.
►Do not use any accessory parts other than those recommended by Pfeiffer Vacuum.
2.6 Foreseeable improper use
Misuse of the product invalidates all warranty and liability claims. Improper use is any, even unintended,
use, which is contrary to the product purpose; and in particular:
●Pumping of corrosive media
●Pumping radioactive media
●Pumping of gases that introduce an ignition source to the suction chamber
●Pumping of gases that contain impurities such as particles, dust, or condensate
●Pumping explosive media
●Pumping of media with a propensity to sublimation
●Pumping of fluids
●Use of the vacuum pump in potentially explosive atmospheres
●Use of the vacuum pump outside the specified area of application
●Use for pressure generation
●Use in strong electrical, magnetic, or electromagnetic fields
●Connection to vacuum pumps or equipment which are not suitable for this purpose according to
their operating instructions
●Connection to devices with exposed live parts
●Use of accessories or spare parts not listed in these operating instructions
●Use of operating fluids other than those specified by Pfeiffer Vacuum
●Use of D1 or mineral oil as operating fluid with an oxygen concentration level of > 21%
Mineral oils are combustible and ignite in high temperatures and when they come into contact with
pure oxygen. This oils oxidize heavily and thus lose their lubricating capacity.
2.7 Personnel qualification
The work described in this document may only be carried out by persons who have appropriate profes-
sional qualifications and the necessary experience or who have completed the necessary training as
provided by Pfeiffer Vacuum.
Safety
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Training people
1. Train the technical personnel on the product.
2. Only let personnel to be trained work with and on the product when under the supervision of
trained personnel.
3. Only allow trained technical personnel to work with the product.
4. Before starting work, make sure that the commissioned personnel have read and understood
these operating instructions and all applicable documents, in particular the safety, maintenance
and repair information.
2.7.1 Ensuring personnel qualification
Specialist for mechanical work
Only a trained specialist may carry out mechanical work. Within the meaning of this document, special-
ists are people responsible for construction, mechanical installation, troubleshooting and maintenance
of the product, and who have the following qualifications:
●Qualification in the mechanical field in accordance with nationally applicable regulations
●Knowledge of this documentation
Specialist for electrotechnical work
Only a trained electrician may carry out electrical engineering work. Within the meaning of this docu-
ment, electricians are people responsible for electrical installation, commissioning, troubleshooting, and
maintenance of the product, and who have the following qualifications:
●Qualification in the electrical engineering field in accordance with nationally applicable regulations
●Knowledge of this documentation
In addition, these individuals must be familiar with applicable safety regulations and laws, as well as the
other standards, guidelines, and laws referred to in this documentation. The above individuals must
have an explicitly granted operational authorization to commission, program, configure, mark, and earth
devices, systems, and circuits in accordance with safety technology standards.
Trained individuals
Only adequately trained individuals may carry out all works in other transport, storage, operation and
disposal fields. Such training must ensure that individuals are capable of carrying out the required activi-
ties and work steps safely and properly.
2.7.2 Personnel qualification for maintenance and repair
Advanced training courses
Pfeiffer Vacuum offers advanced training courses to maintenance levels 2 and 3.
Adequately trained individuals are:
●Maintenance level 1
─Customer (trained specialist)
●Maintenance level 2
─Customer with technical education
─Pfeiffer Vacuum service technician
●Maintenance level 3
─Customer with Pfeiffer Vacuum service training
─Pfeiffer Vacuum service technician
2.7.3 Advanced training with Pfeiffer Vacuum
For optimal and trouble-free use of this product, Pfeiffer Vacuum offers a comprehensive range of
courses and technical trainings.
For more information, please contact Pfeiffer Vacuum technical training.
Safety
15/60

3 Product description
3.1 Function
The rotary vane pumps of the HenaLine are single-stage, oil-sealed rotary positive displacement pumps
with air cooling and circulatory lubrication. A non-return valve in the vacuum connection closes the in-
take line automatically when the rotary vane pump is switched off and prevents an operating fluid return
flow. The integrated oil mist filter cleans the conveyed gas and prevents the operating fluid mist from
being emitted at the exhaust. An operating fluid filter is also installed for cleaning the operating fluid.
Fig. 2: Operating principle
The pumping system is made up of the housing, the eccentrically mounted rotor, and the centrifugally
sliding vanes, which divide the suction chamber into multiple chambers. The volume of each chamber
changes periodically as the rotor rotates. This causes the gas to be continuously drawn in at the vac-
uum connection and compressed in the suction chamber by the rotation of the rotor until the exhaust
valve opens against the atmospheric pressure and the gas leaves the suction chamber.
1
2
3
4
5
6
7
8
12
11
10
9
Fig. 3: Structure of the rotary vane pump
1 Operating fluid separator 7 Sight glass
2 Vacuum connection 8 Operating fluid filter
3 Gas ballast valve 9 Motor
4 Exhaust connection 10 Motor terminal box
5 Filler screw with manometer 11 Intermediate flange
6 Drain screw 12 Axial fan with oil / air heat exchanger
3.1.1 Operating fluid
The pump oil, also known as operating fluid, fulfills various tasks in a rotary vane pump:
●lubrication of all moving parts
●filling part of the dead volume under the exhaust valve
●sealing the gap between the intake and exhaust channel, and between the vanes and the working
chamber
●ensuring an optimal temperature balance through heat transfer
Product description
16/60

3.1.2 Operating fluid return via the float valve
Function of the operating fluid return
The operating fluid return functions only at an operating pressure of < 800 hPa.
The vacuum pumps are equipped with an operating fluid return as standard. If the operating fluid col-
lected in the operating fluid separator reaches a certain level, a float valve opens and the ejected oper-
ating fluid is returned to the intake port of the vacuum pump.
3.1.3 Cooling
The vacuum pump is cooled by heat radiation from its surface, the air flow of the two fan impellers and
by the pumped gas.
In case of thermally unfavorable ambient conditions, Pfeiffer Vacuum recommends the use of a pump
version with oil/water heat exchanger. The oil/water heater is installed at the factory. The oil/water heat
exchanger cannot be retrofitted.
●Air cooling (standard)
●Oil/water heat exchanger (optional)
3.1.4 Gas ballast
An integrated gas ballast system serves the controlled supply of ambient air or inert gas into the suction
chamber. Gas ballast supports the reduction of condensate accumulating in the pumping system.
3.2 Identifying the product
►To ensure clear identification of the product when communicating with Pfeiffer Vacuum, always
keep all of the information on the rating plate to hand.
►Observe the motor-specific data on the motor rating plate attached separately.
3.3 Product features
Pump type Characteristics
Hena 201 ●Nominal pumping speed 200 – 240 m3/h
Hena 251 ●Nominal pumping speed 250 – 300 m3/h
Hena 301 ●Nominal pumping speed 300 – 360 m3/h
● Oil/water heat exchanger (optional)
Hena 301 S ●Nominal pumping speed 300 – 360 m3/h
● Limited intake pressure
● 3 exhaust filters
● max. continuous intake pressure ≤ 100 hPa
Tbl. 4: Features of the rotary vane pumps
3.4 Scope of delivery
●Rotary vane vacuum pump with motor
●Operating fluid
●Locking caps for vacuum and exhaust connection
●Operating instructions
Product description
17/60

4 Transportation and Storage
4.1 Transporting the vacuum pump
WARNING
Risk of serious injury from swinging, toppling or falling objects
During transport, there is a risk of crushing and impact on swinging, toppling or falling objects. There
is a risk of injuries to limbs, up to and including bone fractures and head injuries.
►Secure the danger zone if necessary.
►Pay attention to the center of gravity of the load during transport.
►Ensure even movements and moderate speeds.
►Observe safe handling of the transport devices.
►Avoid sloping attachment aids.
►Never stack products.
►Wear protective equipment, e.g. safety shoes.
NOTICE
Equipment damage from operating fluid leaking into the pumping system.
If the vacuum pump is tipped, the operating fluid will overflow into the pumping system, resulting in
the vane breaking when the vacuum pump is switched on.
►Always transport the vacuum pump horizontally or without operating fluid filling.
►Fill in the operating fluid only at the final installation location.
Pfeiffer Vacuum recommends keeping the transport packaging and original protective cov-
er.
General information regarding safe transport
1. Observe the weight specified on packaging.
2. Use personal protective equipment, e.g. safety shoes.
3. Use transport equipment (e.g. fork lift truck or lift truck).
4. Where possible, always transport or ship the product in the original packaging.
5. Be mindful of transport damage.
6. Always place the product on an adequately sized, level surface.
Transporting the vacuum pump with its packaging
1. Observe safe handling of manually operated transport devices.
2. Note the center of gravity of the load.
3. Use a fork lift truck or pallet truck to transport the vacuum pump on a pallet in its packaging.
4. Ensure harmonious movements and moderate speeds.
5. To protect the inside of the pump, leave both protective caps on the connections during transport.
2
1
Fig. 4: Transporting the vacuum pump
1 Protective cap 2 Crane lug
Transportation and Storage
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Transporting the vacuum pump without its packaging
1. Unpack the vacuum pump.
2. To protect the inside of the pump, leave the protective caps on the connections during transport.
3. For lifting, use the crane lug provided for this purpose, located on the top of the pump.
4. Lift the vacuum pump out of the transport packaging.
5. Always place the vacuum pump on an adequately sized, level surface.
4.2 Storing the vacuum pump
Pfeiffer Vacuum recommends storing the products in their original transport packaging.
Procedure
1. Seal the vacuum and exhaust connection.
2. Make sure that the gas ballast valve is closed.
3. Store the vacuum pump only in dry, dust-free rooms, within the specified ambient conditions.
4. In rooms with humid or aggressive atmospheres: Hermetically seal the vacuum pump together
with a drying agent in a plastic bag.
5. Change the operating fluid if the storage period is longer than 2 years.
Transportation and Storage
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5 Installation
5.1 Installing the vacuum pump
> 500 mm
> 500 mm
> 200 mm
Fig. 5: Minimum distances to the lateral limitations (top view)
Procedure
1. Place the vacuum pump on a flat, horizontal surface, to safeguard the operating fluid supply.
2. Observe the permissible angle of inclination of ±1°.
3. Screw the vacuum pump onto the rubber-metal buffers on the mounting surface.
4. When installing the pump in a closed housing, ensure adequate air circulation.
5. Keep the sight glass and gas ballast valve visible and freely accessible.
6. Keep the voltage and frequency specifications on the motor rating plate visible and freely accessi-
ble.
5.2 Connecting the vacuum side
NOTICE
Property damage from contaminated gases
Pumping down gases that contain impurities (condensate, particles) damages the vacuum pump.
►Use suitable filters or separators from the Pfeiffer Vacuum range of accessories, to protect the
vacuum pump.
Installation and operation of accessories
Pfeiffer Vacuum offers a series of special, compatible accessories for its rotary vane
pumps.
●You can find information and ordering options for approved accessories online.
●Described accessories are not included in the shipment.
Required consumables
●Screw lock, e.g. Loctite 245 or Loctite 577
Procedure
1. Remove the protective cap from the vacuum connection.
2. Establish the shortest possible pipeline between vacuum pump and vacuum chamber.
3. Choose a minimum diameter equal to the nominal diameter of the vacuum connection.
4. Clean the connection threads.
5. For sealing, apply screw lock to the thread turns.
6. Install the piping with pipe components and fasteners from the Pfeiffer Vacuum Components
Shop.
7. Use screw lock for the thread.
8. Support or suspend the piping to the vacuum pump so that no piping system forces act on the
vacuum pump.
9. Use a separator or filter from the Pfeiffer Vacuum line of accessories if necessary.
As an alternative, screwing flanges DN 63/100 ISO-K / G 2" are available from Pfeiffer Vacuum Acces-
sories.
Installation
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