LEYBOLD VARODRY VD65 User manual

VARODRY
VD65/ VD100/ VD160/ VD200
Operating instructions 300766038_002_C1
Part No.
111065...
111100...
111160...
111200...

Copyright notice
©Leybold GmbH. All rights reserved.
Trademark credit
Leybold and the Leybold logo are trademarks of Leybold GmbH, Bonner Strasse 498,
D-50968 Cologne.
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1 Safety and compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 Denition of Warnings and Cautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Important Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Mechanical Hazards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Electrical Hazards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Thermal Hazards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Hazards Caused by Materials and Substances. . . . . . . . . . . . . . . . . . . . 8
2.5 Noise Hazard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 Risk of Damaging the Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Supplied Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Transport and Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Placement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Conforming Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2.1 Non-conforming Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3 Connect the Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4 Removal of Pump Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.5 Electrical Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.6 Optional VFD Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.7 Purge Gas/Gas Ballast Connection (optional). . . . . . . . . . . . . . . . . . . . 16
5.8 Manual Gas Ballast Conguration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.9 Connecting solenoid gas ballast/purge valves. . . . . . . . . . . . . . . . . . . . 17
6 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Switching Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Leybold Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1 Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2 Pump Timing Belt Change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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Contents

7.3 Replace the Belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.4 Blow Off Valve Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.1 Waste Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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Contents

List of Figures
Figure 1. Dimensional drawing (mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 2. Transportation of the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 3. Connections and controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. Remove the cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 5. Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 6. Arrow - direction of rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 7. Manual gas ballast conguration. . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 8. Connecting solenoid gas ballast/purge valves. . . . . . . . . . . . . . . . 18
Figure 9. Blow off valve cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
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List of Figures

1 Safety and compliance
1.1 Denition of Warnings and Cautions
NOTICE:
Obligation to Provide Information
Read and follow these instructions carefully before installing and commissioning to
ensure optimum and safe operation right from the start.
Safe and proper operation is guaranteed when used correctly and in accordance with
the instructions contained in these operating instructions. Please read all safety
instructions in this section and the rest of this manual carefully and make sure that
these instructions are followed. The device may be operated and maintained only by
trained personnel in the proper condition and as described in the operating
instructions. Also observe local and state requirements and regulations. If you have
any questions regarding safety, operation or maintenance of the device, please
contact our nearest subsidiary.
DANGER:
Danger indicates a hazard with a high level of risk which, if not avoided, will result in
death or serious injury.
WARNING:
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
CAUTION:
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
NOTICE:
Information about properties or instructions for an action which, if ignored, will cause
damage to the pump or the system.
We reserve the right to change the design and the stated data. The illustrations are not
binding.
Keep the instructions for future use.
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Safety and compliance

2 Important Safety Information
Pressures given in bar or mbar are absolute values. If exceptionally a gauge pressure is
meant, a “g” is added (for example, bar (g)).
2.1 Mechanical Hazards
1. Avoid exposing any part of the human body to the vacuum.
2. Select a secure place for the appliance (level surface).
3. Never operate the pump without a connected intake line or without tting a blank
ange.
4. The discharge port of the pump must not be blocked or constricted. Never operate
the pump with a seal-off stopper in place blanking off the exhaust port. Operate the
pump only with a connected vacuum system to the intake ange.
5. With a closed exhaust pipe, the pump can generate up to 1.5 bar (g) overpressure
on the exhaust. The exhaust pipes should be laid out accordingly.
6. Condensates from the pump can collect inside or at the exhaust, escape and spill
onto the oor, when operating the pump without an exhaust line or during transport
with an exhaust being not blanked off. In this case there exists the risk of slipping.
7. Take note of the labelling of inlet and outlet. A mix-up can lead to dangerous build-
up of pressure in the vacuum system or in the system. After each change of the
electrical connection, check the pump's rotational direction.
8. In case of power supply outage, the vacuum system is ventilated by the pump. If
this is not wanted, install a non-return valve at the inlet.
9. After a loss of power, the pump restarts independently. If this is not wanted, install a
restart inhibitor.
10. Do not operate the pump with any of the covers removed. This may result in serious
injury.
WARNING:
When rotated in the wrong direction, the pump will generate up to 4.5bar (g) pressure
at the inlet. If a vacuum system is connected, the pressure build up can lead to
explosion of the system.
2.2 Electrical Hazards
1. Housing parts must not be removed.
2. The electrical connection must only be provided by a trained person.Obey the
national regulations in the country of use like EN 50110-1 for Europe.
3. Note the information on the IP type of protection.
DANGER:
After a mains power failure the pump will run up automatically again. This also applies
in the case of an emergency shut-down. In order to prevent the pump from running
up automatically again, the pump must be integrated within a control arrangement
such that it can only be switched on manually again after the mains power has
returned.
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Important Safety Information

2.3 Thermal Hazards
CAUTION:
The surface of the pump may attain temperatures over 80 °C. There is the risk of burn
injury.
1. Before servicing and maintenance work, always leave the pump to cool down.
2.4 Hazards Caused by Materials and Substances
DANGER:
Before commissioning the pump, make sure that the media which are to be pumped
are compatible with each other so as to avoid hazardous situations. Observe the
instructions for proper and improper use of the pump in Conforming Use.
2.5 Noise Hazard
CAUTION:
The noise level of the pump during ultimate pressure operation corresponds to the
values stated in the technical data. In other operating modes and depending on the
connected vacuum system, higher values can be expected. Make sure that suitable
protection measures are taken to protect your hearing.
2.6 Risk of Damaging the Pump
1. Before starting up for the rst time, the motor circuit must be equipped with a
suitable protective motor switch. Please take note of the information in these
Operating Instructions and on the electric motor (wiring diagram).
2. Do not allow the ingestion of objects (screws, nuts, washers, pieces of wire, etc.)
through the inlet port. If required, use an inlet lter.
3. Do not use the pump for applications that produce abrasive or adhesive powders or
condensible vapors that can leave adhesive or high viscosity deposits. When
planning to pump vapors other than water vapor please contact our sales or service
department for advice.
4. This pump is suited for pumping water vapor within the specied water vapor
tolerance limits.
5. Avoid vapors that can condense into liquids when being compressed inside the
pump, if these substances exceed the vapor tolerance of the pump.
6. In the case of wet processes we recommend the installation of liquid separators
upstream and downstream of the pump as well as the use of the gas ballast.
7. The exhaust line should be laid so that it slopes down and away from the pump so
as to prevent condensate from back streaming into the pump.
8. Avoid the entry of particles and uids.
9. The air intakes of the pump and the motor must remain free.
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Important Safety Information

3 Description
The VARODRY is a dry-compressing vacuum pump and can evacuate containers in the
rough vacuum range.
The pump is connected to a 3-phase network on the motor terminal board and operated
directly from the mains. It is air-cooled and requires minimum maintenance.
3.1 Supplied Equipment
The pump is delivered ready for operation. Intake and exhaust anges are covered with
caps.
3.2 Technical Data
Table 1 Technical data
VARODRY 65 100 160 200
Maximum pumping speed without gas ballast 65 m3/h 105 m3/h 150 m3/h 200 m3/h
Ultimate pressure without gas ballast 0.01 mbar
Maximum permissible inlet pressure 1200 mbar
Maximum permissible discharge pressure
(Relative to ambient)5) 200 mbar
Water vapor tolerance with gas ballast4) 20/60 mbar
Water vapor capacity with gas ballast 4) 0.8/2 kg/h 1.2/3.1 kg/h 11.9/5.1 kg/h 2.4/6.7 kg/h
Permissible ambient temperature 0 to +40 °C
Storage temperature -20 to +60 °C
Noise level without external silencer, at ultimate pressure
(50/60 Hz, according to DIN EN ISO 2151) 64/67 dB(A) 64/67 dB(A) 70/72 dB(A) 70/72 dB(A)
Relative ambient atmospheric humidity 95%, non-condensing
Max. Installation height 1) Up to 1000 m above sea level
Cooling Air
Mains voltage 50 Hz versions 2) 400 V+/-10% or 200 V+/-10%
Mains voltage 60 Hz versions 2) 460 V+/-10% or 230 V+/-10%
380 V+/-10% or 200 V+/-10%
Phases 3-ph
Max. Current 50 Hz versions 200/400 V 3) 6.4/3.2 A 8.6/4.3 A 12.6/6.3 A 17.0/8.5 A
Max. Current 60 Hz versions 230/460 V 3) 5.6/2.8 A 7.6/3.8 A 10.6/5.3 A 14.8/7.4 A
Max. Current 60 Hz versions 200/380 V 3) 6.0/3.4 A 8.3/4.6 A 12.8/6.9 A 16.9/10.0 A
Max. Power consumption 1500 W 2200 W 3000 W 4000 W
Permissible motor speed 2) 50/60Hz
Protection class IP 55
Intake connection G 2"
Discharge ange DN G 1 1/2"
Weight (approximate) 105 kg 115 kg 130 kg 140 kg
1) Please inquire for installation heights above 1000 m.
2) Depending on version 50 or 60Hz. Please see pump nameplate.
3) Motor protective switch must be suitable for operation with IE3 motors.
4) Depending on installed conguration. Please see chapter purge gas for details.
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Description

5) Up to 200 mbar possible depending on the inlet pressure of the pump. Please consult
Leybold if 50 mbar is exceeded
Figure 1. Dimensional drawing (mm)
1. Optional inlet position 1. Optional inlet position
Variable dimensions VD65 VD100 VD160 VD200
A 773 865 402 153
B 670 762 494 194
C 402 957 647 270
D 153 957 647 270
3.3 Accessories
Table 2 Accessories
Centering ring, aluminium, FPM DN 40 ISO-KF 18208
Clamping ring, aluminium DN 40 ISO-KF 18343
Inlet adapter G 1¼" 111005A21
Inlet adapter DN40 ISO-KF 111005A20
Inlet adapter DN63 ISO-K 111005A24
Exhaust adapter DN40 ISO-KF 111005A30
Replacement timing belt 50 Hz versions E6525604
Replacement timing belt 60 Hz versions E6525605
Belt replacement tool kit EK6530942
Pump ushing kit
Inlet non return valve (for operation > 10 mbar) 111005A15
Inlet adapter NPT 1¼ - 11.5 111005A22
Inlet adapter NPT 2 - 11.5 111005A23
Exhaust adapter NPT 1½ - 11.5 111005A31
Blow off valve replacement kit EK6525317
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Description

Caster kit 111005A50
Fail safe gear replacement kit EK6528264
Inlet non return valve repair kit EK1637009390
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Description

4 Transport and Storage
Transport the pump on a pallet or with a crane using both lifting eyes at the top of the
pump. Never try to lift the pump on just one lifting eye. Figure: Transportation of the pump
on page 12.
Storage
Until the pump is put into operation, store the pump in a dry place, preferably at room
temperature, sealed with the supplied end caps.
Figure 2. Transportation of the pump
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Transport and Storage

5 Installation
Figure 3. Connections and controls
1. Cooling air - out 2. Inlet ange
3. Cooling air - out 4. Exhaust ange
5. Purge gas port (optional) 6. Electrical feedthroughs
7. Lifting eye 8. Cooling air - in
1. Cooling air - out 2. Inlet ange
3. Cooling air - out 4. Exhaust ange
5. Purge gas port (optional) 6. Electrical feedthroughs
7. Lifting eye 8. Cooling air - in
5.1 Placement
The cooling air intake and outlets must not have a blockage to prevent insufcient cooling
of the pump. Figure: Connections and controls on page 13.
5.2 Conforming Use
The VARODRY range is designed for use in light and medium industrial applications. The
pumps are capable to handle small amounts of dust and liquids however the use of inlet
lters or liquid traps is recommended in such cases. They are not hermetically sealed and
will release small amounts of pumped gases to ambient even if the exhaust port is
connected to an exhaust pipework. They are suitable for pumping water steam or other
vapors within the limits of the vapor tolerance. The pump can be used both continuously
at a suction pressure range of 0.01 mbar to 1050 mbar as well as for cyclic pump
operations within this pressure range.
5.2.1 Non-conforming Use
The VARODRY is not suited for pumping of:
▪Radioactive substances
▪Explosive substances
▪Ignitable gas mixtures
▪Pyrophoric gases
▪Liquids
▪Media in signicant amounts condensing in the pump (Except from water)
▪Solids
▪Corrosive gases
▪Oxidative substances with the exception of £ 21% oxygen in the air
▪Toxic gases
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Installation

5.3 Connect the Pump
▪Remove the caps. We recommend that you retain the caps for decommissioning of
the pump.
▪During installation work on the intake and discharge lines do not subject anges to
any excessive stresses.
Intake side
▪At the intake side, connect the pipework to the vacuum chamber.
▪The intake line must be clean. Deposits in the intake line can degas and impair the
vacuum. The connecting anges must be clean and undamaged.
Note:
Do not allow the ingestion of any objects (screws, welding beads, nuts, washers,
pieces of wire, etc.) through the intake port of the pump.
Exhaust line
▪Connect the exhaust line with a hose/pipework to the pump, or when operating the
pump without a connected exhaust line, operate the pump only in a well ventilated
room.
▪The cross-section of the exhaust line must at least match the inside diameter of the
connections.
▪When pumping vapors, we recommend connecting a condensate separator at the
exhaust. The exhaust lines should be laid so that they drop down and away, thereby
preventing condensate from owing back into the pump.
DANGER:
The operator must check, whether the pumped gases will lead to safety risks on the
environment if the pump is operated without an exhaust line (i.e. risk of suffocation,
risk of slipping due to condensing vapors, etc.).
CAUTION:
Smaller cross sections may cause an undesirable overpressure within the system. Do
not start the pump with a constricted or blocked exhaust. Ensure that any valves or
blocking devices in the exhaust line are open. Clogged exhaust lines will reduce the
available pumping speed, increase temperature and cause overloading of the pump
motor or a dangerous overpressure within the system. There is the risk of bursting.
The pump can generate pressures up to 1.5 bar (g) at the exhaust, when the
discharge line is shut.
5.4 Removal of Pump Cover
In order to access the electrical terminals, the purge gas or gas ballast connections the
pump cover has to be removed. To do the pump maintenance, remove only the front
cover of the pump.
To remove the pump cover, do the following steps:
1. Allow the pump to cool down in order to avoid receiving burns from hot surfaces
underneath the cover.
2. Disconnect the inlet ange from the vacuum system.
3. Remove the four side screws of front pump cover. Figure: Remove the cover on
page 15.
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Installation

4. Slide the front cover by hand and remove from the pump.
5. Remove the four side screws of back pump cover.
6. Slide the back cover by hand and remove from the pump.
Figure 4. Remove the cover
1. Front cover 2. Back cover 1. Front cover 2. Back cover
5.5 Electrical Connection
VARODRY is supplied with three-phase motor but without accessories for electrical
connection. They must be connected via the appropriate cable, and a suitable motor
protection switch.
The pump cover must be removed to connect the motor cable.
Set the switch in accordance with the rating on the pump nameplate.
Please observe the diagram inside the motor junction box.
Figure 5. Electrical connection
After connecting the motor and after every time you alter the wiring, check the direction of
rotation. To do so, briey switch on the motor and make sure that the pump fan rotates in
counter-clockwise direction. If not, interchange two phases of the connection.
An arrow (sticker) indicating the correct direction of rotation is placed on the drive cover.
To avoid damage to the pump or the vacuum system make sure that the inlet of the
pump is not connected to a closed vacuum system when doing this test. Running the
pump at full speed in the wrong direction of rotation will generate pressures up to 4.5 bar
(g) at the inlet port, if not vented to atmosphere.
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Installation

Figure 6. Arrow - direction of rotation
5.6 Optional VFD Use
If desired the VARODRY pumps can be operated via an external variable frequency drive
(VFD). However it is not allowed to run the VARODRY with more than the nominal speed.
A range of suitable VFDs is available as accessories. Please consult Leybold if other types
of VFDs shall be used. The permissible motor speed dened in the technical data must
be obeyed.
Please note that the pump performance and power consumption is not a linear function
of motor speed.
5.7 Purge Gas/Gas Ballast Connection (optional)
The VARODRY has a gas ballast system and an optional seal-purge system. It consists of
three components.
1. Gas ballast
The VARODRY is equipped with a gas ballast which feeds ambient air into the pump
to dilute condensable vapors and keep the partial pressure below the condensation
level. The VARODRY offers two levels of water vapor tolerance, 20 mbar and 60
mbar. The tolerance level can be selected depending on the application
requirements. A high vapor tolerance will reduce the vacuum performance of the
pump. If the presence of condensable vapors in the pumped gases can be ruled out
the gas ballast can be closed. Using the gas ballast will improve the vapor handling
but reduce the vacuum performance of the pump.
2. Seal purge exhaust side (optional)
The VARODRY range has no hermetically sealed shaft feedthroughs at the exhaust
side. Therefore small amounts of gases inside the pump will escape into the ambient
air if no seal purge is used. In order to avoid this the shaft seals at the exhaust side
can be loaded with purge gas. The purge gas will create a gas barrier that will
prevent gas from inside the pump to escape. Note that a fraction of the purge gas
will also escape to the ambient. Make sure that the pump is operated in a room with
good ventilation if other gases than air are used as purge gas.
3. Seal purge inlet side
Inlet seal purge can be used if there is a risk that harmful amounts of dust or
condensable vapors are present at the inlet of the pump. Such substances could
migrate to the inlet side bearings of the pump and reduce the service interval
signicantly. The inlet side purge is typically only used whenever the inlet pressure
increases and is active until a pressure equalization is reached.
Based on the pump type, the VARODRY has either a manual gas ballast or 3
solenoid valves for inlet & outlet seal purge and gas ballast mounted underneath the
pump enclosure.
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Installation

5.8 Manual Gas Ballast Conguration
The VARODRY with manual gas ballast (standard version) is delivered with components
that can be mounted to the pump body in order to achieve different water vapor
tolerances. The following pictures show the possible setups.
When changing the setup, make sure that the gaskets are in good condition and that the
parts are tightened properly.
Figure 7. Manual gas ballast conguration
A. Nozzle 60 mbar water vapor tolerance B. Nozzle 20 mbar water vapor tolerance
C. Silencer/Filter D. Plug (no gas ballast)
A. Nozzle 60 mbar water vapor tolerance B. Nozzle 20 mbar water vapor tolerance
C. Silencer/Filter D. Plug (no gas ballast)
5.9 Connecting solenoid gas ballast/purge valves
The VARODRY with solenoid valves (optional) has three separate valves as shown in
Figure: Connecting solenoid gas ballast/purge valves on page 18.
Connect 24 V DC (!) supply voltage to the solenoid valves that will be used in the
application. The valves can be activated independently depending on the application
requirements.
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Installation

Figure 8. Connecting solenoid gas ballast/purge valves
A. Nozzle 60 mbar water vapor tolerance +
solenoid valve
B. Nozzle 20 mbar water vapor tolerance
C. Silencer/Filter
A. Nozzle 60 mbar water vapor tolerance +
solenoid valve
B. Nozzle 20 mbar water vapor tolerance
C. Silencer/Filter
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Installation

6 Operation
Start the VARODRY by applying the supply voltage.
WARNING:
Connect the pump to an exhaust gas pipework if other gases than clean air are
pumped.The exhaust of the pump must not be blocked or constricted. Never operate
the pump with the seal-off stoppers in place blanking off the exhaust port.
The VARODRY can be started up to 20 times per hour.
6.1 Switching Off
Switch off the pump by disconnecting from the mains voltage.
If condensable vapors have been conveyed, operate the pump for 30 minutes with closed
process valve and open gas-ballast before switching off in order to evaporate the residual
condensate.
The pump will run down for several seconds. Due to the design, the vacuum system is
then vented through the pump, if no valve is closed between the pump and the vacuum
system. In this case, the pump runs backwards until the pressure is equalized. In case of
vacuum chambers exceeding a dened volume a valve must be closed before switching
off the pump to avoid over-speeding of the pump and contamination of the vacuum
system with dust streaming back from the exhaust pipework.
The maximum chamber sizes to be vented through the pump are:
VARODRY VD 65: 500 l
VARODRY VD 100: 800 l
VARODRY VD 160-200: 1000 l
The ventilation process may take several minutes, depending on the size of the container.
Wait for the pressure equalization before opening the vacuum system or disconnecting
the pump from the vacuum system.
In order to avoid back-venting of the vacuum chamber close the inlet of the pump with a
valve before switching off. A suitable inlet non return valve is available as optional
accessory.
6.2 Leybold Service
Whenever you send us equipment, indicate whether the equipment is contaminated or is
free of substances which could pose a health hazard. If it is contaminated, specify exactly
which substances are involved. You must use the form we have prepared for this
purpose.
The form Declaration of Contamination for Compressors, Vacuum Pumps and
Components is available on www.leybold.com-> Downloads -> Download Documents.
Attach the form to each pump. This statement detailing the type of contamination is
required to satisfy legal requirements and for the protection of our employees.
We will return to the sender any equipment which is not accompanied by a contamination
statement.
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300766038_002 - © Leybold
Operation

7 Maintenance
7.1 Maintenance Schedule
For the VARODRY products two types of maintenance are required:
1. Belt change
2. Pump overhaul
The belt change can be done by the user of the pump.(See instructions in Pump Timing
Belt Change on page 20).
The pump overhaul requires special equipments and must be done by Leybold Service
only.
For determining the operation hours, the VARODRY is equipped with a battery powered
hour meter. In order to access the hour meter the pump cover has to be removed. (see
picture 3.2)
The lifetime of the battery is limited to 3-5 years. If the battery is empty the hour meter
needs to be repaced. Contact Leybold Service for hour meter replacement.
Maintenance Interval (operation hours)
Ambient temperature:
0 °C-30 °C
Ambient temperature:
30 °C-40 °C
Belt change 6000 hours or 25000 start
cycles 4,800 hours or 25000 start cycles
Overhaul 24000 hours 19200 hours
Blow off valve inspection
(applications which form deposits
only)
6000 hours 4200 hours
7.2 Pump Timing Belt Change
The pump timing belt is subjected to wear and must be replaced after a dened operation
period (see maintenance schedule). The belt exchange can be either performed by
Leybold Service or by the pump user.
Accessories required:
▪Replacement timing belt (50 Hz Versions: E6525604, 60 Hz Versions: E6525605)
▪Belt replacement tool kit (EK6530942)
▪Tools for disconnecting the vacuum pipework
▪Allen key tool: 5 mm + 8 mm
▪Spanners: 19 mm
▪Torque wrench: 2.5 Nm ‑40 Nm
▪Soft brush for cleaning
300766038_002 - © Leybold
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Maintenance