Elmo Rietschle C-DLR 301 Quick guide

C
C-Serie
C-Series
Klaue
Claw
Edition: 2.0 ·20/01/2023 ·BA 887-EN
Translation of the original
Operating Instructions
C-DLR 301
Compressor
Keep in a safe place for future reference!

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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 Directives, standards, laws ..................................................... 4
1.5 Copyright ................................................................... 5
1.6 Disclaimer .................................................................. 5
1.7 Specialist terms and meaning ................................................... 5
2 Safety ..................................................................... 6
2.1 General..................................................................... 6
2.2 Labelling of warnings .......................................................... 6
2.3 Symbols and meaning ......................................................... 6
2.4 Intended use ................................................................ 8
2.5 Inadmissible operating modes................................................... 8
2.6 Personnel qualification and training............................................... 8
2.7 Personal protective equipment .................................................. 9
2.8 Safety-conscious working ...................................................... 9
2.9 Responsibilities of the user ..................................................... 10
2.10 Hazardous substances ........................................................ 10
2.10.1 Conveying media ..................................................... 10
2.10.2 Auxiliary materials and lubricant.......................................... 10
2.11 Safety equipment, monitored functions............................................ 11
2.12 Emergency Stop / Emergency Off ................................................ 11
2.13 Protection of environment ...................................................... 11
3 Transport and storage........................................................ 12
3.1 Transport ................................................................... 12
3.1.1 Unpack and check the as-delivered condition ............................... 12
3.1.2 Lift and transport ..................................................... 12
3.2 Storage..................................................................... 13
3.2.1 Ambient conditions during storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Product overview and functioning .............................................. 14
4.1 Product overview C-DLR301 ................................................... 14
4.2 Product overview C-DLR301 with frequency converter ............................... 15
4.3 Data plate................................................................... 16
4.4 Description.................................................................. 17
4.5 Fields of application........................................................... 17
4.6 Accessories ................................................................. 17
5 Installation ................................................................. 18
5.1 Preparation of installation ...................................................... 18
5.2 Installation .................................................................. 18
5.3 Connection of pipes........................................................... 19
5.4 Check lubricating oil .......................................................... 19
5.5 Connect to the energy supply network ............................................ 19
5.5.1 Connect motor, machine without frequency converter ........................ 20
5.5.2 Connect motor, machine with frequency converter ........................... 20

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Table of contents
6 Commissioning and decommissioning .......................................... 21
6.1 Start-up .................................................................... 21
6.1.1 Installation check ..................................................... 21
6.1.2 Check the rotation direction ............................................. 22
6.2 Decommissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2.1 Decommissioning of the machine ........................................ 22
6.2.2 Storing the machine ................................................... 22
6.3 Recommissioning............................................................. 22
7 Maintenance and repair....................................................... 23
7.1 Ensure operational safety ...................................................... 23
7.2 Maintenance table ............................................................ 24
7.3 Preparing maintenance works ................................................... 24
7.4 Cleaning of the compressor..................................................... 24
7.5 Lubricating Oil ............................................................... 25
7.5.1 Check/refill oil level.................................................... 25
7.5.2 Oil change........................................................... 26
7.6 Air filter ..................................................................... 27
7.7 Motor and coupling ........................................................... 28
7.7.1 Motor .............................................................. 28
7.7.2 Coupling / Fan ....................................................... 28
7.8 Safety valve ................................................................. 29
7.9 Frequency converter .......................................................... 29
7.10 Repair / service .............................................................. 29
7.11 Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8 Errors...................................................................... 31
9 Disassembly and disposal..................................................... 33
9.1 Disassembly................................................................. 33
9.2 Disposal .................................................................... 33
10 Technical Data .............................................................. 34

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Foreword
1 Foreword
1.1 Principles
These Operating Instructions:
• Are a part of the following contact-free running claw compressors.
• C-DLR 301
• C-DLR 301 with frequency converter (variants Fxxx)
• Describes the safe and proper use in all life phases and are to be observed by all responsible persons
• Include general information on installation, commissioning, maintenance and inspection
• Must be available at the place of application.
Figures presented in these Operating Instructions serve for better understanding and can deviate from the
components installed. This does not influence the validity of the details set out in the instructions.
1.2 Target group
Target group for these Operating Instructions are the technically trained specialist personnel which have
been qualified by appropriate training and instruction.
1.3 Supplier documentation and accompanying documents
Document Contents No.
Supplier documentation
Operating Instructions BA 887
Declaration of Conformity C 0079
Declaration of no-objection 7.7025.003.17
Connection diagram
(in the cover of the frequency converter) –
Spare parts list Spare parts documents E 887
Data sheet Technical data and characteristic curves D 889
Info sheet Storage guideline for lubricants I 100
Info sheet Storage guideline for machines I 150
Operating Instructions Operating instructions of the frequency convert-
er INVEOR M –
The documents can be ordered from our Service or downloaded using the following link:
• http://www.gd-elmorietschle.com
The operating instructions for the frequency converter is available at the following link:
• https://www.kostal-industrie-elektrik.com
1.4 Directives, standards, laws
See Declaration of Conformity.

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Foreword
1.5 Copyright
These Operating Instructions are intended for the customer's internal purposes.
Unless expressly permitted, passing on to third parties, copying of these documents, except for internal pur-
poses, as well as using and providing their contents to third parties, even in excerpts, is prohibited.
Contraventions will lead to claims for damages.
1.6 Disclaimer
Please note that we cannot accept any liability for damages arising from failure to observe the instructions.
Gardner Denver Schopfheim GmbH does not assume liability for the following cases:
• Not intended use
• Not complying with these instructions
• Nonobservance of all documents and specifications belonging to the overall documentation
• Erection, operation, maintenance and repair by insufficiently qualified staff
• Changing or removing of the manufacturing or serial number
• 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
Please, also consider that repairs are only allowed to be done by authorised workshops using original spare
parts; otherwise our guarantee will expire.
1.7 Specialist terms and meaning
Term Explanation
Machine Compressor and motor combination ready to be connected
Motor Compressor drive motor
Compressor Machine to produce excess pressure
Frequency converter A frequency converter allows an infinitely variable control of the speed.
Claw Design or operating principle of the machine
Volume flow The volume flow determines how much air or gas volume per time unit is
delivered by a compressor or flows through a pipe, specified in m³/h
Final compression pressure Maximum excess pressure that a compressor can generate, given as ex-
cess pressure in bar (g)
Noise emission Noise emitted at a specific loading state indicated as a numeric value,
sound pressure level dB(A) as per EN ISO 3744.
Abbreviation Meaning
Fig. Figure
Tab. Table
C-DLR Type name of compressor
FC Frequency converter

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Safety
2 Safety
The manufacturer shall not be liable for damages caused by non-observance of the whole documentation.
2.1 General
These Operating Instructions contain basic instructions for installation, commissioning, maintenance and in-
spection works which must be obeyed to ensure the safe operation of the machine and prevent physical and
material damages.
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 to:
• Symbols for connections
• Data plate and motor data plate
• Information and warning signs
The data plates on the machine may not be removed, not even if the machine is resold. For all queries about
the product, please always quote the serial number.
The user is responsible for observing local regulations.
2.2 Labelling of warnings
Warning Danger level
DANGER ...warns of a hazardous situation, which will lead to death or life-threatening
injuries if not avoided.
WARNING ...warns of a potentially dangerous situation, which can lead to death or seri-
ous injuries if not avoided.
CAUTION …warns of a hazardous situation, which can cause slight or medium personal
injuries if not avoided.
NOTICE ...warns of a situation that can cause damages to or destruction of material
assets if not avoided.
2.3 Symbols and meaning
Symbol Explanation
ØInstructions, action
a), b),... Instructions in several steps
Results
Reference

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Safety
Symbol Explanation
Warning signs Obey all safety instructions with this symbol in order to avoid injury or
death.
Warns of the potential risk of injury
Warns of electrical voltage
Warns of suspended loads
Warns of hot surface
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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Safety
2.4 Intended use
The machine is suitable for conveying the following media:
• All non-explosive, non-combustible, non-aggressive and non-poisonous, dry gases and gas-air
mixtures
The machine is permitted to be operated only in such areas that are described in these Operating
Instructions:
ØOnly operate the machine in technically perfect condition
ØThe 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
ØThe machine is only permitted to be operated within the speed range and frequency range that is speci-
fied on the data plate of the frequency converter
Any use extending beyond this use is seen as not in accordance with the intended use.
The intended use also includes the compliance with the operating data and operating agents specified in the
operating instructions, the listed maintenance works, as well as the details in the documentation issued by
the manufacturers of components and attachments.
If used under critical conditions and/or in case of any doubts, please contact the manufacturer. Non-obser-
vance can cause machine failures.
2.5 Inadmissible operating modes
• Extracting, conveying and compressing of explosive, inflammable, aggressive or poisonous media, e.g.
dust as per ATEX zone 20-22, solvents as well as gaseous oxygen and other oxidation agents, water
vapour, liquids or solids
• Erection and operation in potentially explosive environment (explosive gas/vapour/mist-air mixtures or
dust-air mixtures or hybrid mixtures of air and flammable substances)
• Using the machine in non-commercial plants unless the necessary precautions and protective measures
are taken in the plant
• Operation of the machine when it is only partially assembled
• Operation without cover sheet
• Operation without standard safety valve
• Using the machine in areas with ionising radiation
• Modifications to machine and accessories
• Changes of the basic settings of the frequency converter
• Operation by not or not sufficiently qualified personnel
2.6 Personnel qualification and training
All works are only allowed to be done by qualified and trained specialist personnel. Unauthorised persons
are not allowed to stay within the operating area and must be prevented from entering operating rooms by
suitable measures.
ØEnsure 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
ØResponsibilities, competences and monitoring of personnel must be regulated by the operating company

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Safety
ØThe following works are only allowed to be done by technical specialist personnel, who have been trained
and instructed for the works assigned:
• Transport only by forwarding agents
• Erection, commissioning, maintenance and inspection works, as well as troubleshooting by technical
specialist personnel (e.g. locksmith, mechanics)
• Works on the electrical system are only allowed to be done by electricians
ØPersonnel to be trained and laypersons may only carry out work on the machine when under the su-
pervision of authorised specialist personnel and must be instructed about possible hazards in a safety
instruction
Specialist personnel:
Persons that can evaluate work assigned to them and evaluate possible risks as a result of their training,
knowledge and experience as well as the applicable regulations.
Qualified electrician:
Specialist personnel that has obtained an electrotechnical specialist education and is familiar with work for
setting up, operation and maintenance of electrical systems and operating material.
Unauthorised persons:
Unauthorised persons are persons who cannot appropriately prove that they are qualified, trained, or in-
structed for the works on the compressor. Furthermore, those people are seen to be unauthorised persons,
who are, because of their physical, cognitive, and health abilities, not able to recognise hazards, caused by
this machine.
2.7 Personal protective equipment
The user must make sure that the required protective clothing and protective equipment is available on the
plant and used by the personnel. The national legal provisions and the national regulations for industrial
safety must be observed.
Recommended protective equipment:
Wear eye protection
Wear protective gloves
Wear safety shoes
Wear ear protection
2.8 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
ØHot parts of the machine must not be accessible during operation or must be fitted with a guard
ØPersons must not be endangered by the free extraction or discharge of pumped media
ØRisks arising from electrical energy must be eliminated
ØThe 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
2.9 Responsibilities of the user
During the whole operating period of the machine, the operating company is obliged to prove that the limits
have been met and the required maintenance and inspection works have been performed.
The user must ensure that:
• All works for installation, commissioning and maintenance are carried out by authorised and qualified
specialist personnel, who gained enough information by an in-depth study of the operating instructions
• All works on electrical equipment are done by an electrician in compliance with the regulations for electri-
cal installations
• The Operating Instructions are always available at the site of operation of the machine for the whole life
phase
• All safety instructions and signs on the machine are always complete and legible
• The operating and maintenance personnel take note of all safety instructions - especially of information
provided in these Operating Instructions - and observe them
• The personal protective equipment is available and is used by the personnel
• All safety-relevant regulations are met
• Unauthorised persons cannot enter the operating site
• Fire warning and firefighting possibilities have been installed and are active
• These Operating Instructions shall be amended by working instructions, as well as the duties to su-
pervise and report. With this they shall consider the operational distinctions. Among others, it refers to
instructions referring to:
• Organization of work
• Work procedures
• Specialist personnel assigned
In the event of accidents caused by the machine notify the Gardner Denver Schopfheim GmbH. Please find
contact data on the back page.
2.10 Hazardous substances
2.10.1 Conveying media
Machinery that may have contact to hazardous substances can cause serious burns, cauterisation or poi-
soning during disassembly, maintenance and repair work.
ØEach time before using our services, it is necessary for reasons of occupational safety and environmental
protection to indicate and declare hazardous substances on or in the plant.
ØSend the completed and signed declaration of no objection back to Gardner Denver Schopfheim. If no
declaration has been sent, we must assume that the plant is free from such substances. In case of doubt,
our service department reserves the right to reject the acceptance until the safety has been determined
without doubt.
2.10.2 Auxiliary materials and lubricant
Incorrect auxiliary materials and lubricants may decompose at high temperatures. The resulting vapours may
be harmful to health and cause fires.
ØUse exclusively the recommended auxiliary materials and lubricants
ØObserve the oil recommendation sign on the machine
ØObserve the safety data sheets of the substances used
ØEnsure proper use
ØObserve the maintenance intervals

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Safety
2.11 Safety equipment, monitored functions
Missing or non-functional safety equipment may lead to dangerous operating states and thus result in
life-threatening injuries.
ØDo not modify or bypass safety equipment and safety functions
ØCheck the function at regular intervals
2.12 Emergency Stop / Emergency Off
Missing safety equipment may lead to hazardous operating states. This can result in severe to mortal injury.
ØThe machine does not have its own Emergency Stop or Emergency Off. This must be implemented by
the user, for instance, by integration of the machine in the user's safety concept.
2.13 Protection of environment
Environmental damage may be caused by the incorrect disposal of operating material and materials. For
questions about environmental protection as well as national regulations, please consult your local disposal
company.
ØAll operating materials as well as all gases, vapours or liquids, e.g. lubricating oil escaping during opera-
tion and maintenance must be collected and disposed of in an environmentally friendly manner.

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Transport and storage
Fig. 1 Load handling equipment for lifting and transporting
1Eyebolt
2Transportation lashing
3 12
3Fixing screw
3 Transport and storage
3.1 Transport
WARNING Death by falling down or tipping over of the transported goods!
Falling 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.
ØAlways attach the machine on all present load handling equipment.
ØDo not stand underneath a suspended load.
ØPut the goods to be conveyed on a horizontal base
(max. inclination: 10 ° in all directions).
3.1.1 Unpack and check the as-delivered condition
a) Unpack the machine on receipt and check for transport damage.
b) Immediately notify the manufacturer of transport damages.
c) Check the scope of deliveries for completeness.
d) Dispose of the packaging in accordance with the local regulations in force.
3.1.2 Lift and transport
WARNING Bodily injury resulting from improper operation!
Improper operation of the lifting gear and the transported goods can cause seri-
ous or fatal injuries.
ØLift and transport the machine only on the permissible load handling
equipment
ØLoads crosswise to the load handling equipment are not permitted.
ØAvoid impact stress.
ØWear your personal protective equipment.

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Transport and storage
The machine is supplied on a pallet.
a) Unload the machine using a forklift or pallet truck and transport it to the place of installation.
b) Tightly fasten the eyebolt (Fig. 1/1) and the fixing screw (Fig. 1/3) on the transportation lashing (Fig. 1/2).
c) To lift and transport the machine, hook it in the eye bolt and the transportation lashing using a hoisting
gear.
d) Lift the machine off the pallet and align it.
3.2 Storage
NOTICE Material damage caused by improper storage!
Improper storage can damage the machine.
ØObserve the storage conditions described below.
3.2.1 Ambient conditions during storage
• Dust-free
• In a dry place
• Vibration free
• Protected against sun radiation
• Storage temperature: -200c to +700c
• Rel. air humidity: max. 80 %
• Close the openings air-tight
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.

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Product overview and functioning
F
E
Z
E
P
A
F
B
F
P1
I K D
S
Q
N
O
M H
4 Product overview and functioning
4.1 Product overview C-DLR301
AAir intake
BPressure line
DSafety valve
ECooling air inlet
FCooling air outlet
HOil filling point
IOil sight glass
KOil discharge point with magnet
MOil recommendation plate
NData plate
ODirection of rotation arrow
PDrive motor
P1Motor data plate
QHot surfaces > 70 °C
SIntake filter
ZIntake silencer
Fig. 2 Compressor C-DLR 301

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Product overview and functioning
F
E
Z
E
A
F
B
F
I K D
S
Q
N/N1
O
M H
PV
4.2 Product overview C-DLR301 with frequency converter
Fig. 3 Compressor C-DLR301 with frequency converter
A Air intake
BPressure line
D Safety valve
ECooling air inlet
FCooling air outlet
H Oil filling point
I Oil sight glass
K Oil discharge point with magnet
MOil recommendation plate
NData plate
N1Data plate - frequency converter
ODirection of rotation arrow
P Drive motor
Q Hot surfaces > 70 °C
SIntake filter
VFrequency converter
ZIntake silencer

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




 

22



1 Model / size (mechanical version)
2 Serial number
3 Year of construction
4 Data matrix barcode
5 Article No.
Fig. 4 Data plate for machines without frequency converter
6 Speed
7 Motor output
8 Operating mode
9 Volume flow
10 Excess pressure





22


22












 







Fig. 5 Data plates for machines with frequency converter
Product overview and functioning
7
4 5
10
2
689
1 3
3 521
6
487 9
10 11
4.3 Data plate
The following information is encoded as barcode:
• Material number (MA)
• Production order (PR)
• Serial Number (SC)
1 Model / size (mechanical version)
2 Year of construction
3 Serial number
4 Data matrix barcode
5 Article No.
6 Motor output
7 Volume flow
8 Excess pressure
9 Frequency range
10 Speed range
11 Motor output

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Product overview and functioning
4.4 Description
The C-DLR301 model is a double-shaft, rotary piston compressor, in which the claws roll against each oth-
er without contacting each other and are dry. The counter-rotating claw 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 com-
pression 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 C-DLR 301 range has a connecting thread on the outlet side and an intake silencer on the inlet side. The
intake air is cleaned by a filter cartridge.
The C-DLR301 is enclosed in an insulation hood. In order to dissipate compression heat, the cooling air is
sucked through between the compressor and the hood using a drum fan that sucks in the fresh cooling air
and discharges the heated air out of the cooling air outlet.
The C-DLR 301 is driven via a coupling by a flanged, three-phase standard motor.
In machines with frequency converter, the frequency converter is installed on the motor and allows the in-
finitely variable control of the speed.
To protect it against overload a safety valve is installed as standard.
4.5 Fields of application
These contact-free running claw compressors C-DLR 301 are suitable for the generation of excess pres-
sure between 0bar and the maximum pressure stated on the data plate (Fig. 4/10). Constant operation is
permissible.
The compressor has a flow rate of 290m3/h at 50Hz. The load limits (overpressure in bar) on the outlet side
are stated on the data plate. Data sheet D 889 or D 887-60 (C-DLR 301 with frequency converter) shows the
dependence of the flow rate from the overpressures.
If the unit is switched on more frequently (at regular intervals of approx. 10 times per hour) or at
higher ambient temperatures and inlet temperatures, excess temperature limit of the motor wind-
ing and the bearings may be exceeded.
Contact the manufacturer regarding such operating conditions.
Observe the ambient and inlet temperature (see chapter 2.4)
If it is installed in the open air the unit must be protected from environmental influences (e.g. by a
protective roof).
4.6 Accessories
The following accessories are options and on request available from Gardner Denver.

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Installation
5 Installation
We urgently recommend having the installation carried out by qualified specialist personnel. Gardner Denver
does not accept liability for damages caused by improper carrying out of installation.
5.1 Preparation of installation
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 instal-
lation and deinstallation of the machine
• No influence by external vibrations
• Hot exhaust air from other machines may not be sucked in the cooling system
• Oil filling position (Fig. 2/H), oil inspection glass (Fig. 2/I) and oil drain (Fig. 2/K) must easily be
available.
• For maintenance works, provide for a space of at least 40cm around the machine.
5.2 Installation
NOTICE 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 (see chapter 10).
NOTICE Property damage from overheating!
Due to too low cooling capacity, the machine can overheat and can be damaged.
ØEnsure for a good aeration and venting of the installation room.
Observe the ambient temperature: min. +5 °C, max. +40 °C
ØThe cooling air inlets and the cooling air outlets must be at least 30 cm away
from the adjacent walls. Cooling air coming out must not be sucked in again.
a) Align the compressor in the place of installation and, if necessary, bolt to the ground.
b) If available, check optional accessories for the correct mounting and correct electrical connection.
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.

19
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MAX
MIN
Fig. 6 Oil level in the sight glass
Installation
5.3 Connection of pipes
NOTICE Material damage resulting from too high forces and torques of the pipes
acting on the machine!
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.
The outlet connection is on the side of the machine (Fig. 2/B).
a) Remove the blind plug/adhesive film on the inlet (Fig. 2/A) and outlet connection (Fig. 2/B).
b) Connect the pipe to the outlet connection (Fig. 2/ B).
For connection lines (with the same pipe cross section as the machine connection) and more than 3
m length, it is reasonable to install a non-return valve, in order to avoid reverse running after switching
off. For suitable non-return valves for your application (accessories ZRK), please contact our Service
department.
c) Make sure that the outlet line is connected correctly and is leakproof!
The compressor volume flow is reduced if the pressure pipe is too narrow and/or too long.
5.4 Check lubricating oil
a) Check the lubricating oil level through the oil
sight glass (Fig. 2/I) and top up, if necessary.
b) Fill the lubricating oil for the gear wheels and
bearings at the oil filling point (Fig. 2/H) up to the
middle of the sight glass (Fig. 2/I).
For suitable types: see chapter 7.5
c) Reclose the oil filling point.
5.5 Connect to the energy supply network
DANGER Danger to life if the electrical installation has not been carried out profes-
sionally!
Installation that has not been carried out professionally or properly can cause
serious injuries or death. The whole electrical system can be destructed.
ØThe electrical installation must only be carried out by a qualified electrician
observing EN 60204.
ØThe main switch has to be provided by the user.
ØThe motor must be safeguarded via a motor protection switch. This must be
installed by the operating company.
NOTICE Property damage due to wrong energy supply!
Wrong operating voltages, frequencies or currents can cause loss of power or
damages to the machine.
ØThe conditions at the installation location must comply with the details on the
motor data plate.

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Installation
5.5.1 Connect motor, machine without frequency converter
Please find the electrical motor data on the data plate (Fig. 2/N) or the motor data plate (Fig. 2/P1). The mo-
tors comply with DIN EN 60034 and are designed in protection class IP 55 and insulation class F. The appro-
priate connection diagram is located in the terminal box of the motor (not existing for the version with plug
connection).
If not otherwise specified on the motor data plate, the following tolerances apply:
• ± 5 % voltage deviation referred to nominal value
• ± 2% frequency deviation
a) Compare the motor data with the data of the existing mains network (current type, voltage, network
frequency, permitted current value).
b) The direction of rotation of the motor must correspond with the direction of rotation arrow (Fig. 2/O) on
the motor flange. Check the rotation direction!
c) Directly connect the motor in the terminal box or use the optional connector (accessories).
For securing, a motor protection switch and a strain relief provide for a screwed cable connection to
connect of the connecting cable.
We recommend using motor protection circuit breakers with delayed switch off, depending on a
possible excess current. Temporary excess current can occur when the machine is started under
cold conditions.
5.5.2 Connect motor, machine with frequency converter
The drive consists of the motor and the frequency converter. The mechanical and electrical connection be-
tween engine and frequency converter has already been established at the time of delivery. The frequency
converter is parameterized with the basic settings.
Please find the electrical data on the data plate (Fig. 5, on the right). The electrical power supply values are
indicated on the data plate of the frequency converter.
If not otherwise specified on the data plate, the following tolerances apply:
• Input voltage: 3~ AC , 400V -15% to 480V +10%
• Input frequency: 47 to 63Hz ± 0 %
• Appropriate network configurations: TN / TT
a) Compare the motor data with the data of the existing mains network (current type, voltage, network
frequency, permitted current value).
b) Connect the frequency converter (Fig. 3/V) according to the operating instructions or the enclosed pin
configuration. Use suitable cable fittings or fasteners to comply with the protection class (IP 65).