KAESER KOMPRESSOREN EPC-2-G Series User instructions

Assembly and operating manual
2-stage piston compressor
EPC-2-G
No.: 9_5753_04 E
Manufacturer:
KAESER KOMPRESSOREN GmbH
96410 Coburg • PO Box 2143 • GERMANY • Tel. [phone] • Fax [phone]
http://www.kaeser.com

Original instructions
/KKW/PEPC 1.04 en SBA-KOLBEN-AGGREGAT 2-STUFIG

1 Regarding this document
1.1 Using this document ......................................................................................................... 1
1.2 Further documents ........................................................................................................... 1
1.3 Copyright .......................................................................................................................... 1
1.4 Symbols and markings ..................................................................................................... 1
1.4.1 Warning notices .................................................................................................. 1
1.4.2 Other notices and symbols ................................................................................. 2
2Technical Specification
2.1 Nameplate ........................................................................................................................ 3
2.2 Options ............................................................................................................................. 3
2.3 Weight .............................................................................................................................. 3
2.4 Compressor block ............................................................................................................ 4
2.5 Ambient Conditions .......................................................................................................... 4
2.6 Ventilation ........................................................................................................................ 4
2.7 Pressure ........................................................................................................................... 5
2.8 Sound Pressure Level ...................................................................................................... 5
2.9 Motor power and speed ................................................................................................... 6
2.10 Compressor oil recommendations ................................................................................... 6
2.10.1 Compressor oil charge ........................................................................................ 7
2.11 Power Supply ................................................................................................................... 7
2.11.1 Three-phase power supply ................................................................................. 8
2.11.2 Electrical connection details for oil level monitoring ........................................... 11
2.12 Network Conditions .......................................................................................................... 12
2.12.1 Mains conditions at 400V/3/50Hz ....................................................................... 12
2.13 Machine duty cycle ........................................................................................................... 12
3 Safety and Responsibility
3.1 Basic Information ............................................................................................................. 14
3.2 Specified Use ................................................................................................................... 14
3.3 Improper use .................................................................................................................... 14
3.4 User's responsibilities ....................................................................................................... 14
3.4.1 Observe statutory and universally accepted regulations .................................... 14
3.4.2 Defining personnel .............................................................................................. 15
3.4.3 Inspection Schedules and Accident Prevention Regulations ............................. 15
3.5 Dangers ............................................................................................................................ 16
3.5.1 Safely dealing with sources of danger ................................................................ 16
3.5.2 Safe machine operation ...................................................................................... 18
3.5.3 Organisational Measures .................................................................................... 18
3.5.4 Danger Areas ...................................................................................................... 19
3.6 Safety Devices ................................................................................................................. 19
3.7 Safety Signs ..................................................................................................................... 19
3.8 Information signs .............................................................................................................. 20
3.9 Emergency situations ....................................................................................................... 21
3.9.1 Correct fire fighting ............................................................................................. 21
3.9.2 Remove any compressor oil from your person. .................................................. 21
3.10 Warranty ........................................................................................................................... 21
3.11 Environmental Protection ................................................................................................. 22
4 Design and Function
4.1 Outline of the machine ..................................................................................................... 23
4.1.1 Main components ............................................................................................... 23
4.1.2 Function .............................................................................................................. 23
4.2 Options ............................................................................................................................. 24
4.2.1 Oil level monitoring ............................................................................................. 24
4.2.2 Adjustable machine mountings ........................................................................... 24
Contents
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G i

4.2.3 Silenced air filter ................................................................................................. 25
4.2.4 Air filter with plastic casing .................................................................................. 25
4.2.5 Castors ............................................................................................................... 26
4.2.6 Bolt-on machine mounts for mounting on tank ................................................... 26
4.3 Operating modes and control modes ............................................................................... 27
4.3.1 Operating modes ................................................................................................ 27
4.3.2 External control unit ........................................................................................... 27
4.4 Safety devices .................................................................................................................. 27
4.4.1 Safety and regulating devices ............................................................................. 28
4.5 Accessories ...................................................................................................................... 28
5 Installation and Operating Conditions
5.1 Safety ............................................................................................................................... 29
5.2 Installation conditions ....................................................................................................... 29
5.2.1 Determining location and clearances .................................................................. 29
5.2.2 Ensuring adequate ventilation ............................................................................ 30
5.2.3 Operation in a compressed air network .............................................................. 31
6 Installation
6.1 Safety ............................................................................................................................... 32
6.2 Reporting Transport Damage ........................................................................................... 32
6.3 Fitting the antivibration mounts ........................................................................................ 32
6.4 Compressed Air Connection ............................................................................................ 33
6.5 Typical installation for safety and regulating devices ....................................................... 33
6.6 Connecting the Power Supply .......................................................................................... 34
6.7 Options ............................................................................................................................. 35
6.7.1 Oil level monitoring ............................................................................................ 35
6.7.2 Anchoring the Machine ....................................................................................... 38
6.7.3 Mounting the machine on a compressed air tank ............................................... 38
6.8 Retrofitting the Sound Enclosure (accessory) .................................................................. 39
6.8.1 Dismantling the sound enclosure ........................................................................ 39
6.8.2 Vent the machine (depressurize) ........................................................................ 39
6.8.3 Fitting the Sound Enclosure ................................................................................ 40
7 Initial Start-up
7.1 Safety ............................................................................................................................... 41
7.2 Instructions to be observed before commissioning or recommissioning .......................... 41
7.3 Checking installation and operating conditions ................................................................ 42
7.4 Motor overload protection ................................................................................................ 43
7.4.1 Checking the motor protection device ................................................................ 43
7.5 Checking direction of rotation ........................................................................................... 43
7.6 Starting the Machine for the First Time ............................................................................ 43
7.7 Measuring the air receiver filling time ............................................................................... 44
8 Operation
8.1 Switching on and off ......................................................................................................... 45
8.1.1 Direct online starting ........................................................................................... 45
8.1.2 Direct online start with solenoid valve ................................................................. 46
8.1.3 Star-delta starting ............................................................................................... 46
9 Fault Recognition and Rectification
9.1 Basic Information ............................................................................................................. 48
9.2 Alarms .............................................................................................................................. 48
10 Maintenance
10.1 Safety ............................................................................................................................... 50
10.2 Maintenance Schedule ..................................................................................................... 50
Contents
ii
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

10.2.1 Logging maintenance work ................................................................................. 50
10.2.2 Regular maintenance tasks ................................................................................ 51
10.2.3 Oil change interval .............................................................................................. 51
10.2.4 Regular service tasks ......................................................................................... 51
10.3 Maintaining the air cooler or fan guard ............................................................................. 52
10.3.1 Cleaning the air cooler or fan guard ................................................................... 53
10.4 Air filter maintenance ....................................................................................................... 53
10.5 Air filter (noise absorbing) maintenance ........................................................................... 54
10.6 Air filter (with plastic casing) ............................................................................................. 55
10.7 Drive Motor Maintenance ................................................................................................. 56
10.8 Checking the oil level ....................................................................................................... 56
10.9 Topping up the compressor oil ......................................................................................... 57
10.10 Changing the compressor oil ........................................................................................... 57
10.11 Testing the pressure relief valve ...................................................................................... 58
10.11.1 Pressure relief valves on the cylinder head, collecting pipe and air cooler ........ 58
10.12 Venting the machine (de-pressurising) ............................................................................ 59
10.13 Solenoid Valve Maintenance ............................................................................................ 60
10.13.1 Clean the solenoid valve ..................................................................................... 60
10.13.2 Changing the solenoid valve. .............................................................................. 61
10.14 Cylinder head and valves ................................................................................................. 61
10.14.1 Checking the cylinder head and valves .............................................................. 61
10.14.2 Cleaning the cylinder head and valves ............................................................... 62
10.14.3 Starting the machine and carrying out a trial run ................................................ 62
10.15 Document maintenance and service work. ...................................................................... 63
11 Spares, Operating Materials, Service
11.1 Note the Nameplate ......................................................................................................... 64
11.2 Ordering consumable parts and operating fluids/materials .............................................. 64
11.3 KAESER AIR SERVICE .................................................................................................. 65
11.4 Service Addresses ........................................................................................................... 65
11.5 Spare Parts for Service and Repair ................................................................................. 65
12 Decommissioning, Storage and Transport
12.1 De-commissioning ............................................................................................................ 66
12.2 Packing ............................................................................................................................ 66
12.3 Storage ............................................................................................................................. 66
12.4 Transporting ..................................................................................................................... 67
12.4.1 Safety .................................................................................................................. 67
12.4.2 Transporting with a forklift truck .......................................................................... 67
12.4.3 Transporting with a crane ................................................................................... 67
12.5 Disposal ........................................................................................................................... 68
13 Annex
13.1 Pipeline and instrument flow diagram (P+I diagram) ....................................................... 69
13.2 Dimensional Drawing ....................................................................................................... 72
13.3 Electrical diagram ............................................................................................................ 76
Contents
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G iii

Contents
iv
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

Fig. 1 Location of safety signs .............................................................................................................. 20
Fig. 2 List of main components ............................................................................................................ 23
Fig. 3 Machine layout ........................................................................................................................... 23
Fig. 4 Oil level monitoring ..................................................................................................................... 24
Fig. 5 Adjustable machine mountings .................................................................................................. 25
Fig. 6 Silenced air filter ......................................................................................................................... 25
Fig. 7 Air filter with plastic casing ......................................................................................................... 26
Fig. 8 Castors ....................................................................................................................................... 26
Fig. 9 Bolt-on machine foot .................................................................................................................. 27
Fig. 10 Recommended machine placement and dimensions [mm] ........................................................ 30
Fig. 11 Fitting the antivibration mounts .................................................................................................. 33
Fig. 12 Compressed air connection ........................................................................................................ 33
Fig. 13 Suggested Safety and Control Devices ...................................................................................... 34
Fig. 14 Oil level monitor connections .................................................................................................... 36
Fig. 15 Changing the oil level monitoring setting .................................................................................... 37
Fig. 16 Securing the bolt-on machine mounts ........................................................................................ 38
Fig. 17 Securing the bolt-on machine mounts ........................................................................................ 38
Fig. 18 Removing the air filter ................................................................................................................ 39
Fig. 19 Fitting the Sound Enclosure ....................................................................................................... 40
Fig. 20 Switching on and off ................................................................................................................... 45
Fig. 21 Cleaning the air cooler or fan guard ........................................................................................... 52
Fig. 22 Air filter maintenance .................................................................................................................. 53
Fig. 23 Air Filter (noise absorbing) Maintenance .................................................................................... 54
Fig. 24 Air filter (with plastic casing) ....................................................................................................... 55
Fig. 25 Checking the oil level ................................................................................................................. 56
Fig. 26 Changing the compressor oil ...................................................................................................... 58
Fig. 27 Checking the pressure relief valves on the cylinder head, collecting pipe and air cooler .......... 59
Fig. 28 Cleaning the solenoid valve ....................................................................................................... 60
Fig. 29 Changing the solenoid valve. ..................................................................................................... 61
Fig. 30 Consumable parts ...................................................................................................................... 64
Fig. 31 Transporting with a forklift truck ................................................................................................. 67
Fig. 32 Transporting with a crane ........................................................................................................... 68
List of Illustrations
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G v

List of Illustrations
vi
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

Tab. 1 The levels of danger and their meaning ..................................................................................... 2
Tab. 2 Nameplate .................................................................................................................................. 3
Tab. 3 Options ....................................................................................................................................... 3
Tab. 4 Weight ........................................................................................................................................ 3
Tab. 5 Compressor block specification .................................................................................................. 4
Tab. 6 Ambient Conditions .................................................................................................................... 4
Tab. 7 Ventilation ................................................................................................................................... 4
Tab. 8 Activating pressure of the cylinder relief valve EPC 150-2 und EPC 230-2 .............................. 5
Tab. 9 Activating pressure of the cylinder relief valve EPC 420-2 bis EPC 1000-2 ............................. 5
Tab. 10 Activating pressure of the air cooler relief valve EPC 420-2 bis EPC 1000-2 ........................... 5
Tab. 11 Sound Pressure Level ................................................................................................................ 5
Tab. 12 Power and speed ...................................................................................................................... 6
Tab. 13 Permissible starting frequency ................................................................................................... 6
Tab. 14 Compressor oil recommendations .............................................................................................. 7
Tab. 15 Compressor oil charge ............................................................................................................... 7
Tab. 16 Supply details 230V/3/50Hz ....................................................................................................... 8
Tab. 17 Supply details 400V/3/50Hz ....................................................................................................... 9
Tab. 18 Supply details 500V/3/50Hz ....................................................................................................... 9
Tab. 19 Supply details 690V/3/50Hz ....................................................................................................... 9
Tab. 20 Supply details 230V/3/60Hz ....................................................................................................... 10
Tab. 21 Supply details 380V/3/60Hz ....................................................................................................... 10
Tab. 22 Supply details 440V/3/60Hz ....................................................................................................... 11
Tab. 23 Supply details 460V/3/60Hz ....................................................................................................... 11
Tab. 24 Connection details for oil level monitoring .................................................................................. 11
Tab. 25 Network impedance .................................................................................................................... 12
Tab. 26 Machine duty cycle ..................................................................................................................... 12
Tab. 27 Inspection intervals according to Ordinance on Industrial Safety and Health ............................ 15
Tab. 28 Danger Areas ............................................................................................................................. 19
Tab. 29 Safety Signs ............................................................................................................................... 20
Tab. 30 Information signs ........................................................................................................................ 20
Tab. 31 Oil level monitor .......................................................................................................................... 35
Tab. 32 Re-commissioning after storage ................................................................................................. 42
Tab. 33 Checklist of installation conditions .............................................................................................. 42
Tab. 34 Air receiver charging time ........................................................................................................... 44
Tab. 35 Faults and remedies ................................................................................................................... 48
Tab. 36 Regular maintenance tasks ........................................................................................................ 51
Tab. 37 Oil change intervals .................................................................................................................... 51
Tab. 38 Regular service tasks ................................................................................................................. 52
Tab. 39 Tightening moment ..................................................................................................................... 62
Tab. 40 Logged maintenance tasks ........................................................................................................ 63
Tab. 41 Consumable parts ...................................................................................................................... 64
List of Tables
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G vii

List of Tables
viii
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

1 Regarding this document
1.1 Using this document
This document, hereafter called the service manual, contains important information about all life pha‐
ses of the machine.
The service manual is part of the machine. It describes the machine as it was at the time of first
delivery after manufacture.
➤ Keep the service manual in a safe place throughout the life of the machine.
➤ Pass the manual on to the next owner/user of the machine.
➤ Ensure that all amendments received are entered in the manual.
➤ Enter details from the machine nameplate and individual items of equipment in the table in chap‐
ter 2.
1.2 Further documents
Included with this operating manual are additional documents intended to assist in the safe operation
of the machine:
■ Installation declaration according to applicable directives.
Missing documents can be requested from KAESER.
➤ Make sure all documents are complete and observe the instructions contained in them.
➤ Make sure you provide the data from the nameplate when ordering documents.
1.3 Copyright
This service manual is copyright protected. Queries regarding use or duplication of the documentation
should be referred to KAESER. Correct use of information will be fully supported.
1.4 Symbols and markings
1.4.1 Warning notices
Warning notices indicate three levels of danger signified by the signal word.
■ DANGER
■ WARNING
■ CAUTION
DANGER
These show the kind of danger and its source.
The possible consequences of ignoring a warning are shown here.
The signal word "DANGER" indicates that death or severe injury can result from ignoring the warn‐
ing.
➤ The measures required to protect yourself from danger are shown here.
1 Regarding this document
1.1 Using this document
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G 1

➤ Always read and comply with warning instructions.
Signal word Meaning Consequences of non-observance
DANGER Warns of an imminent threat of danger Death or serious injury may result
WARNING Warns of possible danger Death or serious injury are possible
CAUTION Warns of a possibly dangerous situa‐
tion
Light injuries or material damage are possible
Tab. 1 The levels of danger and their meaning
1.4.2 Other notices and symbols
This symbol refers to particularly important information.
Material Here you will find details on special tools, operating materials or spare parts.
Precondition Here you will find conditional requirements necessary to carry out the task.
Here conditions relevant to safety are named that will help you to avoid dangerous situations.
➤ This symbol is is placed by lists of actions comprising one stage of a task.In lists of actions with
several stages the sequence of actions is numbered.
This symbol is is placed by lists of actions comprising one stage of a task.
In lists of actions with several stages the sequence of actions is numbered.Information that refers
to only one option is marked with an indicator (e.g.: H1 means that this section is only valid for
machines with adjustable machine feet).
Information referring to potential problems are identified by a question mark.
The cause is named in the help text ...
➤ ... and a remedy given.
This symbol refers to important information or measures concerning environmental protection.
Further information Here, your attention is drawn to further topics.
1 Regarding this document
1.4 Symbols and markings
2
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E
Option H1

2 Technical Specification
2.1 Nameplate
The machine's nameplate provides the model designation and important technical information.
➤ Enter here the nameplate data as a reference:
Feature Value
Reciprocating Compressor
Part No.
Serial No.
Year of manufacture
Maximum working pressure
Delivery
Rated voltage
Synchronous speed
Rated power
Ambient temperature
Tab. 2 Nameplate
2.2 Options
The table contains a list of possible options.
➤ Enter options here as a reference.
Option Option code Available?
Oil level monitor C5
Adjustable machine mountings H1
Silenced air filter H9
Air filter with plastic casing H10
Castors H14
Bolt-on machine mounts for mounting on tank H20
Tab. 3 Options
2.3 Weight
The weight indicated is the maximum weight. The actual weight depends on equipment fitted.
Model Weight [kg]
EPC 150-2-G 40/-*
EPC 230-2-G 45/100*
* Machine with sound enclosure
2 Technical Specification
2.1 Nameplate
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G 3

Model Weight [kg]
EPC 420-2-G 70/160*
EPC 550-2-G 95/155*
EPC 750-2-G 125/260*
EPC 1000-2-G 130/240*
* Machine with sound enclosure
Tab. 4 Weight
2.4 Compressor block
Model Theoretical displace‐
ment [l/min]
Delivery at 12 bar
[l/min]
Number of cylinders
KC 150-2 150 112 2
KC 236-2 230 188 2
KC 420-2 420 336 2
KC 550-2 550 450 2
KC 750-2 750 610 2
KC 1000-2 1000 820 2
Tab. 5 Compressor block specification
2.5 Ambient Conditions
Installation
Maximum altitude AMSL*
[m]
1000
Permissible ambient tem‐
perature [°C]
5–35
* Higher altitudes are permissible only after consultation with the manufacturer.
Tab. 6 Ambient Conditions
2.6 Ventilation
The values given are minimum guide values.
Model Inlet aperture (Z) [m2] Exhaust fan (A) [m3/h]
EPC 150-2-G 0.4 330
EPC 230-2-G 0.4 510
EPC 420-2-G 0.4 900
EPC 550-2-G 0.4 1200
EPC 750-2-G 0.5 1650
*Forced ventilation: required airflow for static ventilator thrust at maximum duty cycle [ΔT 10 K]
2 Technical Specification
2.4 Compressor block
4
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

Model Inlet aperture (Z) [m2] Exhaust fan (A) [m3/h]
EPC 1000-2-G 0.75 2250
*Forced ventilation: required airflow for static ventilator thrust at maximum duty cycle [ΔT 10 K]
Tab. 7 Ventilation
2.7 Pressure
Activating pressure of the cylinder relief valve EPC 150-2 und EPC 230-2
Maximum working pres‐
sure [bar]
15
Activating pressure [bar] 17.5
Tab. 8 Activating pressure of the cylinder relief valve EPC 150-2 und EPC 230-2
Activating pressure of the cylinder relief valve EPC 420-2 bis EPC 1000-2
Maximum working pres‐
sure [bar]
15
Activating pressure [bar] 11
Tab. 9 Activating pressure of the cylinder relief valve EPC 420-2 bis EPC 1000-2
Activating pressure of the air cooler relief valve EPC 420-2 bis EPC 1000-2
Maximum working pres‐
sure [bar]
15
Activating pressure [bar] 17.5
Tab. 10 Activating pressure of the air cooler relief valve EPC 420-2 bis EPC 1000-2
2.8 Sound Pressure Level
Operational state
■ Operating mode LOAD at rated speed, rated air flow and nominal pressure.
Measurement conditions
■ Mean sound pressure level at 1 m distance to EN ISO 2151
Model Sound pressure level [dB(A)] Sound pressure level with enclo‐
sure
[dB(A)]
EPC 150-2-G 75 65
EPC 230-2-G 76 66
EPC 420-2-G 76 67
EPC 550-2-G 78 68
EPC 750-2-G 80 70
2 Technical Specification
2.7 Pressure
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G 5

Model Sound pressure level [dB(A)] Sound pressure level with enclo‐
sure
[dB(A)]
EPC 1000-2-G 82 72
Tab. 11 Sound Pressure Level
2.9 Motor power and speed
➤ Read off the enclosure protection rating from the motor nameplate and enter in the table:
Model Rated power
[kW]
Synchronous
speed [min-1]
(50 Hz)
Synchronous
speed [min-1] (60
Hz)
Degree of pro‐
tection
KC 150-2 1.1 1500 1800
KC 236-2 1.7 1500 1800
KC 420-2 3.0 1500 1800
KC 550-2 4.0 1500 1800
KC 750-2 5.5 1500 1800
KC 1000-2 7.5 1500 1800
Tab. 12 Power and speed
Permissible starting frequency
➤ Read-off the permissible starting frequency of the motor from the table below.
Rated power [kW] Permissible starting frequency [1/h]
1.1 20
1.7 20
3.0 15
4.0 15
5.5 15
7.5 15
Tab. 13 Permissible starting frequency
2.10 Compressor oil recommendations
The standard compressor oil is SAE 5 W30 or VDL 150.
For special applications FGPor S 150 compressor oil is used and the machine carries a sticker indi‐
cating this.
Information on ordering compressor oil is found in chapter 11.
2 Technical Specification
2.9 Motor power and speed
6
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

➤ Mark the oil that your compressor contains in the table below.
Standard oil Special oil
EPC 150-2/
EPC 230-2
EPC 420-2 bis
EPC 1000-2
Oil type SAE 5 W30 VDL 150 FGP S 150
Application Standard oil for all
applications ex‐
cept in connection
with foodstuffs.
Standard oil for all
applications ex‐
cept in connection
with foodstuffs.
Specifically for ma‐
chines in applica‐
tions where the
compressed air
may come into
contact with food‐
stuff.
Special oil for ma‐
chines under high
operational de‐
mand.
Maximum permis‐
sible oil change in‐
terval in operating
hours/years.
1000/2* 1000/1* 1000/2* 2000/1*
Oil contained in my
compressor
* Cool to moderate ambient temperatures, low humidity, low to average duty cycle.
Tab. 14 Compressor oil recommendations
2.10.1 Compressor oil charge
Model Total charge [litres] Topping up volume [litres]
(minimum–maximum)
KC 150-2 1.1 0.1
KC 236-2 1.1 0.1
KC 420-2 1.2 0.2
KC 550-2 1.2 0.2
KC 750-2 1.5 0.4
KC 1000-2 1.5 0.4
Tab. 15 Compressor oil charge
2.11 Power Supply
Basic requirements
The machine is designed for a power supply conforming to EN 60204–1 (IEC 60204–1), section 4.3.
In the absence of other user-specified conditions, the limits laid down in this standard must be adhered
to.
It is recommended that the supplier and user confer and agree on the basis of the EN 60204–1,
Annex B.
2 Technical Specification
2.11 Power Supply
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G 7

2.11.1 Three-phase power supply
The machine requires a symmetrical three-phase power supply.
In a symmetrical three-phase supply the phase angles and voltages are all the same.
This machine may only be supplied from an earthed TN or TT three-phase supply in which the neutral
point is earthed.
Connection to an IT supply is not permitted without taking further measures (earth leak detection,
etc.).
Further information When connecting to a European 400 V/3/50 Hz power supply the requirements in chapter 2.12 are
also to be observed.
See electrical diagram in 13.3.
2.11.1.1 Power supply specifications
The following supply cable conductor cross sections (copper multi-core) and fusing (slow-blow
class gL) are selected according to German
DIN VDE 0100-430 (IEC 60364–4–43 and IEC 60364–4–473)) and DIN VDE 0298–4 standards for
30 °C ambient temperature and wiring type C.
➤ For other application conditions, check conductor diameters and change accordingly.
➤ Cables laid side-by-side must be separated by a distance equal to one cable diameter.
Other conditions would include, for example:
■ Higher temperature
■ Other cable installation method
■ Cable length >50 m
■ Bundled cables
Mains frequency: 50 Hz
Rated voltage: 230V±10%/3/50Hz
Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
150-2-G 4.7 ● 10 4 x 1.5 – –
230-2-G 6.9 ● 10 4 x 1.5 10 4 x 1.5
420-2-G 11.8 ● 25 4 x 4 16 4 x 2.5
550-2-G 17.3 ○ 35 4 x 6 20 4 x 2.5
750-2-G 21.0 ○ 50 4 x 10 25 4 x 4
1000-2-G 29.4 ○ 63 4 x 16 35 4 x 6
● Pressure switch
○ Controller (star-delta)
Tab. 16 Supply details 230V/3/50Hz
2 Technical Specification
2.11 Power Supply
8
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E

Rated voltage: 400V±10%/3/50Hz
Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
150-2-G 2.7 ● 6 4 x 1.5 - -
230-2-G 4.0 ● 10 4 x 1.5 6 4 x 1.5
420-2-G 6.8 ● 16 4 x 2.5 10 4 x 1.5
550-2-G 10.0 ● 20 4 x 2.5 16 4 x 2.5
750-2-G 12.0 ● 16 4 x 2.5 16 4 x 2.5
1000-2-G 18.0 ○ 25 4 x 4 20 4 x 2.5
● Pressure switch
○ Controller (star-delta)
Tab. 17 Supply details 400V/3/50Hz
Rated voltage: 500V±10%/3/50Hz
Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
150-2-G 2.2 ● 6 4 x 1.5 – –
230-2-G 3.2 ● 10 4 x 1.5 6 4 x 1.5
420-2-G 5.2 ● 10 4 x 1.5 6 4 x 1.5
550-2-G 8.0 ● 16 4 x 2.5 10 4 x 1.5
750-2-G 9.6 ● 20 4 x 2.5 10 4 x 1.5
1000-2-G 14.4 ○ 35 4 x 6 16 4 x 2.5
● Pressure switch
○ Controller (star-delta)
Tab. 18 Supply details 500V/3/50Hz
Rated voltage: 690V±10%/3/50Hz
Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
150-2-G 1.6 ● 6 4 x 1.5 – –
230-2-G 1.8 ● 6 4 x 1.5 – –
420-2-G 3.9 ● 10 4 x 1.5 – –
550-2-G 5.8 ● 10 4 x 2.5 – –
750-2-G 6.9 ● 16 4 x 2.5 – –
● Pressure switch
○ Controller (star-delta)
2 Technical Specification
2.11 Power Supply
No.: 9_5753_04 E
Assembly and operating manual 2-stage piston compressor
EPC-2-G 9

Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
1000-2-G 10.4 ● 20 4 x 2.5 – –
● Pressure switch
○ Controller (star-delta)
Tab. 19 Supply details 690V/3/50Hz
Mains frequency: 60 Hz
Rated voltage: 230V±10%/3/60Hz
Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
150-2-G 4.6 ● 10 4 x 1.5 – –
230-2-G 6.9 ● 16 4 x 2.5 – –
420-2-G 10.9 ● 20 4 x 2.5 16 4 x 2.5
550-2-G 17.4 ○ 35 4 x 6 20 4 x 2.5
750-2-G 21.0 ○ 50 4 x 10 25 4 x 4
1000-2-G 28.0 ○ 63 4 x 16 35 4 x 6
● Pressure switch
○ Controller (star-delta)
Tab. 20 Supply details 230V/3/60Hz
Rated voltage: 380V±10%/3/60Hz
Direct online starting Star-delta starting
EPC type Current input
[A]
Backup fuse
[A]
Supply cable
[mm2]
Backup fuse
[A]
Supply cable
[mm2]
150-2-G 2.8 ● 6 4 x 1.5 – –
230-2-G 4.2 ● 10 4 x 1.5 – –
420-2-G 7.1 ● 16 4 x 2.5 10 4 x 1.5
550-2-G 10.5 ● 20 4 x 2.5 16 4 x 2.5
750-2-G 12.5 ● 25 4 x 4 16 4 x 2.5
1000-2-G 19.0 ○ 35 4 x 6 20 4 x 2.5
● Pressure switch
○ Controller (star-delta)
Tab. 21 Supply details 380V/3/60Hz
2 Technical Specification
2.11 Power Supply
10
Assembly and operating manual 2-stage piston compressor
EPC-2-G No.: 9_5753_04 E