Gardner Denver Elmo Rietschle twister S Series User manual

S
S-Serie
S Series
Schraube
Screw
Edition: 1.0 ·11.09.2019 ·BA 833-OXY-EN
Operating Instructions
S-VSI 100 OXY
Vacuum pump
Translation of the original Operating Instructions

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Table of contents
Table of contents
1 Foreword................................................................... 4
1.1 Principles ................................................................... 4
1.2 Target group ................................................................. 4
1.3 Supplier documentation and accompanying documents .............................. 4
1.4 Abbreviations ................................................................ 4
1.5 Directives, standards, laws ..................................................... 4
1.6 Symbols and meaning ......................................................... 5
1.7 Specialist terms and meaning ................................................... 6
1.8 Copyright ................................................................... 6
2 Safety ..................................................................... 7
2.1 Labelling of warnings .......................................................... 7
2.2 General..................................................................... 7
2.3 Intended use ................................................................ 7
2.4 Inadmissible operating modes................................................... 8
2.5 Personnel qualification and training............................................... 8
2.6 Safety-conscious working ...................................................... 8
2.7 Safety instructions for the user .................................................. 8
2.8 Safety instructions for installation, commissioning and maintenance..................... 9
2.9 Guarantee terms ............................................................. 9
3 Transport, storage and disposal................................................ 10
3.1 Transport ................................................................... 10
3.1.1 Unpacking and checking the as-delivered condition .......................... 10
3.1.2 Lift and transport ..................................................... 10
3.2 Storage..................................................................... 11
3.2.1 Ambient conditions during storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Disposal .................................................................... 11
4 Product overview and functioning .............................................. 12
4.1 Product overview - continuous flow cooling (standard)................................ 12
4.2 Product overview - circulation cooling (water-air-heat exchanger) ....................... 13
4.3 Data plate................................................................... 14
4.4 Description.................................................................. 14
4.5 Fields of application........................................................... 15
4.6 Accessories ................................................................. 15
4.7 Cooling of the machine ........................................................ 15
4.7.1 Continuous flow cooling (standard) ....................................... 15
4.7.2 Circulation cooling (water-air-heat exchanger) ............................... 16
5 Installation ................................................................. 17
5.1 Preparation of installation ...................................................... 17
5.2 Installation .................................................................. 17
5.3 Connection of pipes........................................................... 18
5.4 Connect cooling water......................................................... 19
5.4.1 Cooling water connection for continuous flow cooling ........................ 19
5.4.2 Cooling water connection for circulating cooling ............................. 20
5.5 Check lubricating oil .......................................................... 20

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Table of contents
5.6 Connect to the energy supply network ............................................ 21
5.6.1 Connection of motor................................................... 21
5.6.2 Connection of sensors ................................................. 21
5.6.3 Connect fan / circulation pump (circulating cooling) .......................... 21
6 Commissioning and decommissioning .......................................... 22
6.1 Start-up .................................................................... 22
6.1.1 Check the rotation direction ............................................. 22
6.1.2 After-run ............................................................ 23
6.2 Decommissioning/ storing ...................................................... 24
6.3 Recommissioning............................................................. 24
7 Maintenance and repair....................................................... 25
7.1 Ensure operational safety....................................................... 25
7.2 Maintenance tasks ............................................................ 26
7.2.1 Change the oil........................................................ 26
7.2.2 Air filter ............................................................. 28
7.2.3 Cooling ............................................................. 30
7.2.4 Coupling ............................................................ 32
7.3 Repair/ service ............................................................... 33
7.4 Spare parts.................................................................. 33
8 Malfunctions: Causes and elimination........................................... 34
9 Technical Data .............................................................. 35

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Preface
1 Foreword
1.1 Principles
These Operating Instructions:
• Are a part of the following screw vacuum pumps of the type S-VSI 100 OXY
• Describes how to use them safely and properly in all life phases
• Must be available where the equipment is used.
1.2 Target group
The target group for these instructions is technically trained personnel.
1.3 Supplier documentation and accompanying documents
Document Contents No.
Supplier documentation
Operating Instructions BA 833-OXY
Declaration of Conformity C 0084
Declaration of no-objection 7.7025.003.17
Spare parts list Spare parts documents E 833-OXY
Data sheet Technical data and characteristic curves D 833-OXY
Info sheet
Storage guideline for lubricants I 100
Storage guideline for machines I 150
Recommended water quality I 832
Manufacturer’s declaration EU Directive 2011/65/EU (RoHS II) —
1.4 Abbreviations
Fig. Figure
S-VSI Vacuum pump
m3/h Pumping capacity
mbar (abs.) Final vacuum, operating vacuum
1.5 Directives, standards, laws
See Declaration of Conformity.

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Preface
1.6 Symbols and meaning
Symbol Explanation
ØInstructions, action
a), b),... Instructions in several steps
Results
Reference
Warning signs Obey all safety instructions with this symbol in order to avoid injury or
death.
Warns of potential risk of injury
Warns of electrical voltage
Warns of suspended loads
Warns of hot surface
Warns of automatic or unexpected start-up of the machine
Warning of potentially explosive substances and mixtures
Mandatory signs Obey all instructions with this symbol in order to avoid injury or death.
Observe the Operating Instructions
Wear eye protection
Wear protective gloves
Wear safety shoes
Wear ear protection
Disconnect the plant and secure it against unexpected restart
Information, note
Protection of environment

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Preface
1.7 Specialist terms and meaning
Term Explanation
Machine Pump and motor combination ready for connection
Motor Pump drive motor
Vacuum pump Machine for creating underpressure (vacuum)
OXY Vacuum pumps for delivering gases with increased percentage of oxygen
and other oxidising agents
Screw Design or operating principle of the machine
Suction capacity Vacuum pump volume flow related to the condition in the inlet connection
Final pressure (abs.) The maximum vacuum that a pump reaches when the inlet opening is
closed, indicated as absolute pressure
Permanent vacuum Vacuum or the inlet pressure range, at which the pump operates in con-
tinuous operation.
The permanent vacuum or inlet pressure is ≥ than the final vacuum and <
than the atmospheric pressure.
Noise emission Noise emitted at a specific loading state indicated as a numeric value,
sound pressure level dB(A) as per EN ISO 3744.
1.8 Copyright
Passing on or copying this document, using and providing information on its contents is prohibited unless
expressly permitted. Contraventions will lead to claims for damages.

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Safety
2 Safety
The manufacturer is not responsible for damage due to non-observance of the whole documentation.
2.1 Labelling of warnings
Warning Danger level Consequences of
non-observance
DANGER Imminent danger Death, severe bodily injury
WARNING Possible imminent danger Death, severe bodily injury
CAUTION Possible hazardous situation Slight bodily injury
CAUTION Possible hazardous situation Material damage
2.2 General
These operating instructions contain basic instructions for installation, commissioning, maintenance and in-
spection work which must be obeyed to ensure the safe operation of the machine and prevent physical and
material damage.
Observe the safety instructions in all chapters.
The operating instructions must be read by the responsible technical personnel / user before installing and
commissioning and must be fully understood. The contents of the operating instructions must always be
available on site for the technical personnel / user. Instructions attached directly to the machine must be
obeyed and must always remain legible. For example, this applies:
• Symbols for connections
• Data plate and motor data plate
• Information signs and warning plates
The user is responsible for observing local regulations.
2.3 Intended use
The machine must only be operated in such areas as are described in the operating instructions:
• Only operate the machine in technically perfect condition
• Do not operate the machine when it is only partially assembled
• The machine must only be operated at an ambient temperature and inlet temperature of between 5 and
40 °C
Please contact us for temperatures outside this range.
• The machine may pump, compress or extract the following media:
• All non-explosive, non-combustible, non-aggressive and non-poisonous dry gases and gas-air
mixtures
• It can also pump extremely damp gases. Water vapour compatibility is very high.
• It is suitable for exhausting air or other gases with increased percentage of oxygen (content by volume
>21 % and <60 %) and other gaseous oxidising agents.
If used under critical conditions and/or in case of any doubts, contact the manufacturer. If this is not ob-
served, this can cause personal injuries and property damage.

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Safety
2.4 Inadmissible operating modes
• Exhausting, conveying and compressing of explosive, inflammable, aggressive, or poisonous media, e.g.
dust as per ATEX zone 20-22, solvents
• Using the machine in non-commercial plants unless the necessary precautions and protective measures
are taken in the plant
• Installation in potentially explosive environments
• Using the machine in areas with ionising radiation
• Back pressures on the outlet side:
S-VSI 3.0 kW > + 0.2 bar
• Modifications to machine and accessories
2.5 Personnel qualification and training
• Ensure that people entrusted with working on the machine have read and understood these operating
instructions before starting work, particularly the safety instructions for installation, commissioning, main-
tenance and inspection work
• Manage the responsibilities, competences and monitoring of personnel
• All work must only be carried out by technical specialists:
• Installation, commissioning, maintenance and inspection work
• Work on the electrical system
• Personnel being trained to work on the machine must be supervised by technical specialists when work-
ing on the machine
2.6 Safety-conscious working
The following safety regulations apply in addition to the safety instructions and intended use listed in these
instructions:
• Accident prevention regulations, safety and operating regulations
• Standards and laws in force
2.7 Safety instructions for the user
• Hot parts of the machine must not be accessible during operation or must be fitted with a guard
• Persons must not be endangered by the free extraction or discharge of pumped media
• Risks arising from electrical energy must be eliminated
• The machine must not come into contact with flammable materials.
Risk of fire due to hot surfaces, output of hot pumped media or cooling air

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Safety
2.8 Safety instructions for installation, commissioning and maintenance
• The user ensures that any installation, commissioning and maintenance work is carried out by authorised,
qualified specialists who have gained sufficient information by an in-depth study of the operating instruc-
tions
• Only work on the machine when it stands still and is secured against accidental switching on
• Strictly observe the procedure for decommissioning the machine described in the operating instructions
• Fit or start up safety and protective devices again immediately after finishing work. Before recommission-
ing, follow the instructions listed for commissioning
• Alteration works or modifications to the machine are only permissible with the manufacturer's consent
• Only use original parts or parts approved by the manufacturer. The use of other parts may void the liabil-
ity for any resulting consequences
• Keep unauthorised people away from the machine
2.9 Guarantee terms
The manufacturer's guarantee will no longer apply in the following cases:
• Not intended use
• Nonobservance of these instructions
• Operation by insufficiently qualified staff
• Using spare parts that have not been approved by Gardner Denver Schopfheim GmbH
• Unauthorised modifications to the machine or the accessories supplied by Gardner Denver Schopfheim
GmbH

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Transport, storage and disposal
Fig. 1 Lift and transport
11
1Eyebolts
3 Transport, storage and disposal
3.1 Transport
3.1.1 Unpacking and checking the as-delivered condition
a) Unpack the machine on receipt and check for transport damage. Sealing plugs must be undamaged.
b) Immediately notify the manufacturer of transport damages.
c) Dispose of the packaging in accordance with the local regulations in force.
3.1.2 Lift and transport
WARNING Death by falling down or tipping over of the transported goods!
Falling down or tipping over of transported goods can cause serious or fatal injuries.
Limbs can be crushed.
ØSelect the lifting device according to the total weight to be transported.
ØSecure the machine against tipping over and falling.
ØDo not stand underneath a suspended load.
ØPut the goods to be conveyed on a horizontal base
(max. inclination: 10 ° in all directions).
WARNING Bodily injury resulting from improper operation!
Improper operation of the lifting gear and the transported goods can cause serious or
fatal injuries.
ØLoads crosswise to the eye bolt are not permitted.
ØAvoid impact stress.
a) Tighten the eyebolt (Fig. 1/1) firmly.
b) The machine must be suspended on the eyebolt using the lifting device for lifting and transporting.
In case of longer transports, put the pump in a transport crate or on a pallet. With this, secure the pump
against tipping over and slipping away!

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Transport, storage and disposal
3.2 Storage
CAUTION Material damage caused by improper storage!
Improper storage can damage the machine.
The storage area must meet the following conditions:
ØDust-free
ØVibration free
ØClose the inlet and the discharge connection with a locking plug to avoid pollution.
3.2.1 Ambient conditions during storage
Ambient conditions Value
Relative humidity 0 % to 80 %
Storage temperature -10 °C to +60 °C
The machine must be stored in a dry environment with normal air humidity. It should not be
stored for more than 6 months.
See Info "Storage instructions", page 4.
3.3 Disposal
WARNING Danger due to flammable, corrosive or poisonous substances!
Machine with contact to hazardous substances can cause serious burns, cauterisa-
tion or poisoning.
ØBefore disposal decontaminate the machine.
ØWear suitable protective clothing.
For disposing of observe the following items:
a) Collect oils and grease separately and dispose of in accordance with the local regulations in force.
b) Do not mix solvents, cold cleaning agent and paint residues.
c) Remove components and dispose of them in accordance with the local regulations in force.
d) Dispose of the machine in accordance with the national and local regulations in force.
e) Parts subject to wear and tear (marked as such in the spare parts list) are special waste and must be
disposed of in accordance with the national and local waste laws.

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A Vacuum connection
BExhaust air outlet
CCooling water inlet G
3/8
DCooling water outlet G
3/8
D1Cooling water drain
ECooling air inlet
FCooling air outlet
H, H1Oil filling point
I, I1Oil sight glass
K, K1Oil discharge point
MOil recommendation plate
NData plate
ORotation direction plate
PDrive motor
P1Motor data plate (see Fig. 3)
QHot surfaces > 70 °C
UGas ballast valve
U1Vent valve
Z Exhaust silencer
Fig. 2 Screw vacuum pumps S-VSI 100 OXY with continuous flow cooling
Product overview and functioning
F
F
A
E
M
M
O
I1
K1
H1
K
H
I C D
B
A
Q
N P
P1
Z
U1
D1U
4 Product overview and functioning
4.1 Product overview - continuous flow cooling (standard)

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Fig. 3 Screw vacuum pump S-VSI 100 OXY with circulation cooling
A Vacuum connection G 2
BExhaust air outlet G 2
D1Cooling water drain
ECooling air inlet
FCooling air outlet
H, H1Oil filling point
IOil sight glass
KOil discharge point
MOil recommendation plate
NData plate
ORotation direction plate
PDrive motor
P1Motor data plate
QHot surfaces > 70 °C
RHeat exchanger
UGas ballast valve
U1Vent valve
U2Temperature control
U4Liquid level monitor
VAFan (IP 44)
V1Terminal box fan
W1Circulation pump (IP42)
W2Manometer
W3Pressure compensation tank
W4Ball valve (filling cooling water)
W5Vent screw (heat exchanger)
W6Vent screw (cooling water circulation)
Z Exhaust silencer
Product overview and functioning
P1
F
E
Z
A
W1
VAV1
P
Q
U2 U1
M
U4
D1
W5NH
W2W3W4
E
B
U
W6
R
F
F
F
KI
H1
4.2 Product overview - circulation cooling (water-air-heat exchanger)

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Fig. 4 Data plate
Product overview and functioning
1 Type / size (mechanical version)
2 Serial number
3 Year of construction
4 Data matrix barcode
5 Item No.
6 Driving speed 50Hz
7 Motor output 50Hz
8 Operating mode
9 Suction capacity
10 Final pressure (abs.)
Johann-Sutter-Straße 6+8, D-79650 Schopfheim, www.elmorietschle.de Made in Germany
EN 60034
S-VSI 100 (07)
0,10 mbar (abs)
100,0 m³/h
3,00 kW
vacuum pump
2910 /min
ID: 10266207GG
S1 100%
BJ: 2019
SN: 1234567890
7
45
10
2
689
1 3
4.3 Data plate
The following information is encoded as barcode:
• Material number (MA)
• Production order (PR)
• Serial Number (SC)
4.4 Description
The TWISTER S-VSI is a twin-screw vacuum pump in which two parallel screw rotors roll off against each
other contactless and dry. The gas to be fed in is hereby enclosed in the pump's suction chamber and com-
pressed by the rotary movement of the screw rotors in the direction of the outlet. The gas sucked in is grad-
ually compressed to atmospheric pressure. The counter-rotating screw rotors are synchronised by a gear
pair in the gearbox. The gears of the synchronized gearbox and the bearings are lubricated with oil. These
components are in a gearbox that also contains the oil supply. Oil conveying devices always ensure that the
bearings and the gears are sufficiently supplied with oil at all permissible speeds.
The gearbox and the compression chamber are separated from each other by special seals. The gearbox is
sealed from the outside with piston sealing rings and O-rings, the compressor chamber with piston rings.
The TWISTER S-VSI is driven by standard flanged three phase motors via a clutch (with an elastomer
component).
To be able to distinguish them from the standard variants, the VSI OXY pumps are blue painted.

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Product overview and functioning
4.5 Fields of application
The vacuum pumps VSI OXY are suitable for exhausting air or other gases with increased percentage of
oxygen (content by volume between 21 % and 60 %).
They are suitable for the evacuation of closed systems or for a continuous vacuum within the following
intake pressure ranges: 0.1 - 1000 mbar (abs.)
The maximum pumping capacity with unrestricted suction is 110 m3/h at 50 Hz. Data sheet D 833-OXY or
D 833-UK_OXYshows the dependency of the pumping capacity on the intake pressure.
If the unit is switched on more frequently (at regular intervals of > 10 times per hour) or at higher
ambient temperatures and inlet temperatures, excess temperature limit of the motor winding and
the bearings may be exceeded.
Contact the manufacturer regarding such operating conditions.
If it is installed in the open air the unit must be protected from environmental influences (e.g. by a
protective roof).
CAUTION Property damage due to not intended operation!
Improper operation can damage the machine.
ØThe screw vacuum pump S-VSI100 with 3 kW motor may only be operated in
continuous operation S1.
4.6 Accessories
The following accessories are options and on request available from Gardner Denver.
4.7 Cooling of the machine
4.7.1 Continuous flow cooling (standard)
With fresh water cooling, water flows continuously through the cavity of the double walled compressor
housing.

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Fig. 5 Circulation cooling
Product overview and functioning
U1Vent valve
U2Temperature control
U4Liquid level monitor
VAFan (IP 44)
W1Circulation pump (IP42)
W2Manometer
W3Pressure compensation tank
RHeat exchanger
W1W2W3
U2 U1U4 VA
R
4.7.2 Circulation cooling (water-air-heat exchanger)
With circulation cooling, the compressor is filled onetime with a water-Glysantin-mixture. This is continuously
pumped through the compressor and the heat exchanger using a circulation pump. The heat exchanger is
air-cooled (fan).
For safety reasons, the cooling system is fitted with a temperature control.
The required pressure compensation is controlled by a pressure compensation container filled with air.
Temperature control
Monitors the temperature of the cooling water. Default mode: Tmax = 60 °C
Liquid level monitor / manometer
Monitors the filling level of the cooling water. Factory-provided filling quantity (filling pressure): pmax = 1.2 bar
Pressure compensation container
Controls the operating pressure of the cooling water. System pressure: pmax = 1.2 bar
Circulation pump
Pumps the cooling water through the compressor. Voltage: 230 V AC
Fan
Cools the cooling water in the heat exchanger. Voltage: 230 V AC
For connection of sensors see chapter5.4.2 on page 20.
The operating instructions for the monitoring elements are enclosed with the machine.

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Installation
5 Installation
DANGER Risk to life due to incorrect installation and commissioning!
Improper or wrong installation can cause serious injuries or death.
ØOnly authorised specialist personnel that have been trained about the safety regula-
tions for handling of oxygen plants are allowed to install and commission the pump.
ØThe regulations for safety and health at work BGR 500 issued by the professional
associations (Operation of oxygen plants) or other relevant national regulations
must be met.
5.1 Preparation of installation
DANGER Risk of explosion due to inadmissible oxygen concentration!
The vacuum pump VSI OXY is not gas-tight. Oxygen enrichment in the room air can
cause explosions.
ØSufficiently vent the place of installation. The oxygen content by volume in the
room air may not exceed 21%.
Ensure the following conditions:
• Machine freely accessible from all sides
• Do not close ventilation grids and holes
• Sufficient space for installing and removing pipes and for maintenance work, particularly for the installa-
tion and deinstallation of the machine
• No external vibration effects
• Do not suck any hot exhaust air from other machines into the cooling system
Oil filling point (Fig. 2/, 3/H, H1), oil sight glasses (Fig. 2/I, I1, 3/I, I1) and oil drains (Fig. 2/K,
K1, 3/K), cooling water inlet (Fig. 2/C, 3/C) and cooling water outlet (Fig. 2/D, 3/D) must be easily
accessible.
The cooling air inlets (Fig. 2/E, 3/E) and the cooling air outlets (Fig. 2/F, 3/F) must be at least 30 cm
away from the adjacent walls. Cooling air coming out must not be sucked in again.
5.2 Installation
DANGER Risk of explosion due to pollution in the intake medium!
If pollutants are sucked in, especially organic substances, this can cause a severe
danger of explosion!
ØTo protect the VSI OXY, the user must install an appropriate filter on the inlet side.
Alternatively, the vacuum-tight intake filter (ZVF) can be installed.
CAUTION Property damage caused by improper installation!
Improper erection and installation can damage the machine.
ØThe machine may only be operated when it is set up horizontally
(Max. inclination: 8 ° in all directions).
ØSecure the machine against tipping over and falling.
ØThe floor must be plane and even.
ØThe bearing surface must be designed to be able to carry the weight of the machine.
ØThe non-return valve must not be removed.

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Installation
An output reduction is noticeable when installed at more than 1000 m above sea level. In this case,
please contact us.
It is possible to install the machine on a firm base without anchoring. When installing on a sub-
structure we recommend fixing it with flexible buffers.
5.3 Connection of pipes
CAUTION Material damage resulting from too high forces and torques of the pipes acting
on the unit!
If forces and torques during installation and operation are too high, the machine can
be damaged.
ØOnly screw in pipes by hand.
ØIf necessary, use flexible connections.
CAUTION Risk of injury due to closed exhaust air opening!
Closed, restricted or covered exhaust air openings can cause too high back pressure
in the machine.
ØNever close or restrict the exhaust air openings.
ØKeep the permissible back pressures on the drain side:
S-VSI 3.0 kW < + 0.2 bar
ØPrevent liquids from accumulating in the exhaust line.
a) Remove the blind plug from the vacuum connection.
b) Connect the pipes with the vacuum connection (Fig. 2/A, 3/A).
c) The exhausted air can be blown out through the exhaust air outlet (Fig. 2/B, 3/B) on the exhaust silencer
or conducted away using a hose or pipe. CAUTION! This must not cause the oxygen enrichment of
the room air!
To avoid distorting in the piping system, we recommend using compensators.
d) Check that the maximum back pressure is not exceeded!
The suction capacity of the vacuum pump is reduced if the inlet pipe is too narrow and/or too
long.

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Installation
5.4 Connect cooling water
CAUTION Risk of injury due to falling!
Fluid leakages can cause the floor to become slippery and persons can fall.
ØCheck pump for loss of cooling water and leakages.
ØWear non-slip shoes.
CAUTION Property damage due to the failing pump!
If the cooling water flow is reduced or interrupted, the cooling of the machine can-
not be ensured. This can cause the blackout failure of the machine and damage the
machine.
ØMake sure that the cooling water flow is not interrupted.
CAUTION Property damage due to missing cooling water control!
If there is no cooling water control, the machine can be damaged in case of malfunc-
tion or failure of cooling of the machine when the malfunction is not remedied imme-
diately.
ØPump is only allowed to be operated with cooling water control.
5.4.1 Cooling water connection for continuous flow cooling
CAUTION Property damage due to wrong coolant!
Dirt particles and aggressive water may lead to malfunctions or to premature wear in
the cooling system.
ØOnly use pH-neutral, clean and filtered water for cooling.
CAUTION Property damage due to improper operation!
Improper operation and wrong operating conditions can damage the machine.
ØThe operating pressure of the cooling water must not exceed 6 bars.
ØThe cooling water temperature must be between 15 and 45°C.
a) Connect the cooling water pipe to the cooling water inlet (Fig. 2/C) and the cooling water outlet pipe to
the cooling water outlet(Fig. 2/D).
b) Check the pump for cooling water leakages.
Suitable cooling water
See Info "Recommended water quality", page 4

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MAX
MIN
Fig. 6 Oil level
Installation
5.4.2 Cooling water connection for circulating cooling
On delivery, the pumps with water-air heat exchanger have already been filled with cooling water (Water-Gly-
santin-mixture at the ratio of 70:30).
a) Check the filling level of cooling water on the manometer (Fig. 3/W2).
Filling pressure: 0.6bar (g), max. 1.2bar (g)
b) Refill cooling water, if necessary.
For refilling see chapter7.2.2, page 28
WARNING Danger to health due to improper dealing with anti-freeze agents!
Anti-freeze may contain harmful ingredients, such as ethylene glycol, that could
damage your health, especially if swallowed.
ØUse the product only as intended and observe the safety instructions issued
by the manufacturer.
CAUTION Property damage due to wrong cooling water pressure!
If the cooling water pressure is too low or too high, cooling of the machine cannot
be ensured anymore and the machine can be damaged.
ØThe cooling water pressure must be within the above mentioned limits.
CAUTION Property damage caused by frost damage in the cooling water circuit!
Freezing cooling water may lead to extensive damage to the machine.
ØUse cooling water with at least 30 % antifreeze agent only.
ØThe amount of anti-freeze used must be adjusted to the ambient climatic
conditions.
5.5 Check lubricating oil
DANGER Risk of explosion due to wrong lubricating oil!
Using the wrong lubricating oil can cause a severe danger of explosion!
ØTo lubricate the vacuum pumps VSI OXY it is only allowed to use oil type OXY-
GEAR-LUBE 160 of Elmo Rietschle.
a) Check the lubricating oil level through the oil sight glass (Fig. 2/I, I1, 3/I) and top up, if necessary.
b) Refill lubricating oil (For suitable types see “Oil change”, page26) for the gear wheels and bearings on
the oil filling points (Fig. 2/H, H1, 3/H, H1) until the centre of the sight glasses (Fig. 2/I, I1, 3/I).
c) Reclose the oil filling points.