LEYBOLD VARODRY OEM VD65 User manual

VARODRY OEM
VD65/VD100/VD160/
VD200
Operating instructions 300890265_002_C3
Part No.
111065v12
111065v13
111065v22
111100v12
111100v13
111100v22
111160v12
111160v13
111160v22
111200v12
111200v13
111200v22

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.

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Supplied equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Transport and storage. . . . . . . . . . . . . . . . . . . . . . 13
5 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 Placement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Conforming use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.1 Non-conforming use. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Connect the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.4 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5 Optional VFD use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.6 Gas ballast. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.7 Gas ballast conguration. . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Switching off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1 Maintenance schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Tools required for maintenance. . . . . . . . . . . . . . . . . . . . . 19
7.3 Pump timing belt change. . . . . . . . . . . . . . . . . . . . . . . . . 20
7.4 Replace the belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.4.1 Disassemble drive enclosure. . . . . . . . . . . . . . . . . . . . . 20
Contents

7.4.2 Disassemble rotor disc, screw and fan. . . . . . . . . . . . . 21
7.4.3 Disassemble belt chamber cover. . . . . . . . . . . . . . . . . . 21
7.4.4 Disassemble fail safe gears. . . . . . . . . . . . . . . . . . . . . . 22
7.4.5 Disassemble belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4.6 Assemble tooth belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4.7 Assemble motor screw. . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4.8 Assemble fail safe gear. . . . . . . . . . . . . . . . . . . . . . . . . 26
7.4.9 Assemble belt chamber cover. . . . . . . . . . . . . . . . . . . . 27
7.4.10 Assemble fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.4.11 Assemble drive enclosure. . . . . . . . . . . . . . . . . . . . . . 28
7.4.12 Electric connection. . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.4.13 Verify motor rotation. . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.5 Blow off valve cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.6 Replace electrical motor. . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.6.1 Motor disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.6.2 Motor assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.7 Table: Motor part list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.1 Waste disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10 Leybold Service. . . . . . . . . . . . . . . . . . . . . . . . . . . 43
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Contents

Figure 1. Dimensional drawing, dimensions in mm. . . . . . . . . . . . . 12
Figure 2. Correct lifting of pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 3. Connections and controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 4. Arrow - direction of rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 5. Gas ballast conguration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6. Tools required for maintenance. . . . . . . . . . . . . . . . . . . . . . . 19
Figure 7. Blow Off Valve Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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
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.
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 4.5 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.
2.2 Electrical hazards
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.
1. Never connect the pump to mains power when the motor junction box
is not closed correctly.
2. The electrical connection must only be provided by a trained person.
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Important Safety Information

3. Obey the national regulations in the country of use like EN 50110-1 for
Europe.
4. Note the information on the IP type of protection.
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 powder vapour sales or service department for advice.
4. This pump is suited for pumping water vapour within the specied
water vapour tolerance limits.
5. Avoid vapour that can condense into liquids when being compressed
inside the pump, if these substances exceed the vapour 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.
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Important Safety Information

9. The air intakes of the pump and the motor must remain free.
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Important Safety Information

3 Description
The pump 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.
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Description

3.2 Technical data
Table 1 Technical data
VARODRY OEM 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
Ultimate pressure with gas ballast 0.1 mbar
Maximum permissible inlet pressure 1200 mbar
Maximum permissible discharge pressure
(Relative to ambient)5) 200 mbar
Water vapour tolerance with gas ballast4) 60 mbar
Water vapour capacity with gas ballast 4) 1.9 kg/h 2.9 kg/h 5.2 kg/h 6.9 kg/h
Permissible ambient temperature 0 to +40 °C
Storage temperature -20 to +60 °C
Noise level without external silencer, at ultimate pres‐
sure (according to DIN EN ISO 2151)
▪50 Hz versions 67 dB(A) 70 dB(A)
▪60 Hz versions 70 dB(A) 73 dB(A)
Relative ambient atmospheric humidity 95%, non-condensing
Maximum 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%
or
200/380 V ± 10% , 3 ph
Phases 3-ph
Maximum current 50 Hz versions 200/400 V3) 6.4/3.2 A 8.6/4.3 A 13.0/6.7 A 15.5/7.5 A
Maximum current 60 Hz versions 230/460 V3) 5.6/2.8 A 7.6/3.8 A 11.3/5.7 A 13.7/6.5 A
Maximum current 60 Hz versions 200/380 V3) 6.0/3.4 A 8.3/4.6 A 12.8/6.9 A 15.5/8.9 A
Permissible motor speed 2) 50/60 Hz
Protection class IP 55
Intake connection G 2"
Discharge ange DN G 1 1/2"
Weight (approximate) 85 kg 95 kg 105 kg 115 kg
1) Please inquire for installation heights above 1000 m.
2) Depending on version 50 or 60 Hz. See the pump nameplate.
3) Motor protective switch must be suitable for operation with IE3 motors.
4) Depending on installed conguration. See Gas ballast conguration on page 17 for details.
5) Up to 200 mbar possible depending on the inlet pressure of the pump. With higher outlet
pressure, the ultimate pressure will be higher.
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Description

Figure 1. Dimensional drawing, dimensions in mm
Variable dimensions VD65 VD100 VD160 VD200
A 630 722 875 875
B 592 684 837 837
C 130 130 174 174
D 402 494 647 647
E 385 385 405 424
F 99 139 219 219
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 EK6528531
Replacement timing belt 60 Hz versions EK6528533
Belt replacement tool kit EK6530942
Pump ushing kit 111005A00
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
Fail safe gear replacement kit EK6528264
Blow off valve replacement kit EK6525317
Replacement sealing plug for silencer E6542410
Outlet pipe VD65-100 E6536491
Outlet pipe VD160-200 E6536613
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Description

4 Transport and storage
Refer to Figure: Correct lifting of pump. 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.
Storage
Store the pump in a dry place, preferably at room temperature. The pump
must be sealed with the supplied end caps.
Figure 2. Correct lifting of pump
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Transport and storage

5 Installation
Figure 3. Connections and controls
1. Motor junction box 2. Gas ballast port
3. Pump exhaust 4. Motor fan
5. Pump inlet 6. Lifting eyes
7. Pump fan 8. Silencer
1. Motor junction box 2. Gas ballast port
3. Pump exhaust 4. Motor fan
5. Pump inlet 6. Lifting eyes
7. Pump fan 8. Silencer
5.1 Placement
The cooling air intake and outlets must not have a blockage to prevent
insufcient cooling of the pump. Refer to Figure: Connections and
controls.
Make sure that there is a gap of minimum 50 mm from pump surfaces in the
marked areas to assure sufcient cooling air ow.
Make sure that there is enough free space around the pump for
maintenance.
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Installation

5.2 Conforming use
The pump 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 vapours
within the limits of the vapour tolerance. The pump can be used both
continuously at a suction pressure range of 0.1 mbar to 1200 mbar as well
as for cyclic pump operations within this pressure range.
5.2.1 Non-conforming use
The pump 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
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
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 (for example risk of
suffocation, risk of slipping due to condensing vapours, etc.).
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Installation

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 overpressure at the exhaust, when the discharge line is shut.
The silencer has an internal burst protection plug to reduce the risk of bursting.
▪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 vapours, 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.
▪If there is a need for a leak tight silencer, use the outlet pipe accessory
▪E6536491 for VD65 - 100
▪E6536613 for VD160 - 200
5.4 Electrical connection
The pump is supplied with three-phase motor but without accessories for
electrical connection. They must be connected with the appropriate cable,
and a suitable motor protection switch.
Set the switch in accordance with the rating on the pump nameplate.
Please observe the diagram inside the motor junction box.
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 and
damage the pump, if not vented to atmosphere.
Figure 4. Arrow - direction of rotation
5.5 Optional VFD use
If desired the pumps can be operated via an external variable frequency
drive (VFD). However it is not allowed to run the pump with more than the
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Installation

nominal speed. A range of suitable VFDs is available as accessories. Please
consult us 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.
5.6 Gas ballast
The pump is equipped with a gas ballast which feeds ambient air into the
pump to dilute condensable vapours and keep the partial pressure below
the condensation level. With the gas ballast in use the pump has a water
vapour tolerance of 60 mbar. If the presence of condensable vapours in the
pumped gases can be ruled out the gas ballast can be closed. Using the
gas ballast will improve the vapour handling but reduce the vacuum
performance of the pump.
5.7 Gas ballast conguration
The pump can be operated with gas ballast active (open) or closed. When
changing the setup make sure that the gaskets are in good condition and
that the parts are tightened correctly.
Figure 5. Gas ballast conguration
A. Vapour tolerance 60 mbar B. No gas ballastA. Vapour tolerance 60 mbar B. No gas ballast
1. Non return valve 2. Nozzle
3. Silencer/Filter 4. Plug (no gas ballast)
1. Non return valve 2. Nozzle
3. Silencer/Filter 4. Plug (no gas ballast)
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Installation

6 Operation
Start the pump by applying the supply voltage. The pump can be started up
to 20 times per hour.
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.
6.1 Switching off
Switch off the pump by disconnecting from the mains voltage.
If condensable vapours 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 equalised. 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 OEM: 500 L
VARODRY VD 100 OEM: 800 L
VARODRY VD 160-200 OEM: 1000 L
The ventilation process may take several minutes, depending on the size of
the container. Wait for the pressure equalisations 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.
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Operation

7 Maintenance
7.1 Maintenance schedule
The maintenance for the pump includes the following:
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).
The pump overhaul requires special equipments and must be done by our
service engineer only.
Maintenance
Interval (operation hours)
Ambient temperature:
0 °C-30 °C
Ambient temperature:
30 °C-40 °C
Belt change 6,000 hours or 25,000 start
cycles
4,800 hours or 25,000 start
cycles
Overhaul 25,000 hours 20,000 hours
Blow off valve inspection
(applications which form de‐
posits only)
6,000 hours 4,800 hours
7.2 Tools required for maintenance
Figure 6. Tools required for maintenance
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Maintenance

Sr No. Description Quantity
1 Torque wrench 1
2 Allen key socket No.6 1
3 Socket wrench insert 22 1
4 Wrench 12 1
5 Allen key T handle 5 1
6 M8 hex screw 1
7 Mallet 1
8 Pulling device 1
9 Ratchet 1
Special tool kit for belt replacement (EK6530942)
10 Tool for belt tension measurement 1
11 Equipment fail safe gear adjustment 1
12 Tool for belt tension adjustment 1
7.3 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 us or by the pump user.
Accessories required:
▪Replacement timing belt
▪50 Hz Versions: EK6528531
▪60 Hz Versions: EK6528533
Refer to Tools required for maintenance on page 19 for more details.
7.4 Replace the belt
CAUTION:
Obey the safety regulations. Make sure that the main power source is disconnected
and all parts with electric supply are covered or closed.
Make sure that there is no pressure difference between inlet and outlet of the pump
during the belt change as the pressure difference will force the pump to rotate. If this
can not be ruled out disconnect the pump from the vacuum system before changing
the belt.
CAUTION:
Loosening the hexagon nuts of rotors will cause severe bearing damages.
7.4.1 Disassemble drive enclosure
1. Use a 5 mm Allen key to remove the 3 screws which secure the drive
enclosure.
2. Separate the drive enclosure from the pump.
3. Remove the foam by hand.
300890265_002_C3 - 09/2021 - © Leybold
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Maintenance