KAESER ASK 28 User manual

Operating Manual
Screw Compressor
ASK
901824 12 E
Manufacturer:
KAESER KOMPRESSOREN SE
96410 Coburg • PO Box 2143 • GERMANY • Tel. [phone] • Fax [phone]
http://www.kaeser.com

Original instructions
/KKW/SASK 2.22 en SBA-SCHRAUBEN-SC2IO
/KKW/SSC 2.08
20170919 084918

1 Regarding this document
1.1 Using this document ......................................................................................................... 1
1.2 Further documents ........................................................................................................... 1
1.3 Copyright .......................................................................................................................... 1
1.4 Symbols and labels .......................................................................................................... 1
1.4.1 Warnings ............................................................................................................. 1
1.4.2 Potential damage warnings ................................................................................ 2
1.4.3 Other alerts and their symbols ............................................................................ 2
2 Technical Specifications
2.1 Nameplate ........................................................................................................................ 4
2.2 Options ............................................................................................................................. 4
2.3 Mass ................................................................................................................................. 5
2.4 Temperature ..................................................................................................................... 5
2.5 Ambient conditions ........................................................................................................... 5
2.6 Ventilation ........................................................................................................................ 6
2.7 Pressure ........................................................................................................................... 6
2.8 Flow rate (constant delivery volume relative to intake conditions) ................................... 7
2.9 Cooling oil recommendation ............................................................................................. 8
2.10 Cooling oil charge quantity ............................................................................................... 9
2.11 Motors and power ............................................................................................................ 10
2.11.1 Compressor drive motor ..................................................................................... 10
2.11.2 Fan motor ........................................................................................................... 11
2.12 Noise emission [dB(A)] ..................................................................................................... 11
2.13 Electrical connection ........................................................................................................ 11
2.14 Power supply specifications ............................................................................................. 12
2.14.1 Mains frequency: 50 Hz ...................................................................................... 12
2.14.2 Mains frequency: 60 Hz ...................................................................................... 13
2.15 Heat recovery ................................................................................................................... 14
3 Safety and Responsibility
3.1 Basic instructions ............................................................................................................. 18
3.2 Specified use .................................................................................................................... 18
3.3 Improper use .................................................................................................................... 18
3.4 User's responsibilities ....................................................................................................... 18
3.4.1 Observe statutory and universally accepted regulations .................................... 18
3.4.2 Determining personnel ........................................................................................ 19
3.4.3 Keeping to Inspection Schedules and Accident Prevention Regulations ........... 19
3.5 Dangers ............................................................................................................................ 20
3.5.1 Safely dealing with sources of danger ................................................................ 20
3.5.2 Safe machine operation ...................................................................................... 22
3.5.3 Organisational Measures .................................................................................... 24
3.5.4 Danger Areas ...................................................................................................... 24
3.6 Safety devices .................................................................................................................. 25
3.7 Service life of safety functions .......................................................................................... 25
3.8 Safety signs ...................................................................................................................... 26
3.9 Emergency situations ....................................................................................................... 27
3.9.1 Correct fire fighting ............................................................................................. 27
3.9.2 Treating injuries from handling cooling oil .......................................................... 27
3.10 Warranty ........................................................................................................................... 28
3.11 Environment protection .................................................................................................... 28
4 Design and Function
4.1 Housing ............................................................................................................................ 29
4.2 Machine function .............................................................................................................. 30
4.2.1 Safety devices .................................................................................................... 30
Contents
901824 12 E
Operating Manual Screw Compressor
ASK i

4.2.2 Floating relay contacts ........................................................................................ 31
4.3 Operating panel SIGMA CONTROL 2 ............................................................................. 31
4.4 Operating modes and control modes ............................................................................... 34
4.4.1 Machine operating modes .................................................................................. 34
4.4.2 Control modes .................................................................................................... 34
4.5 Options ............................................................................................................................. 36
4.5.1 SIGMA CONTROL 2 controller: Connection to control technology .................... 36
4.5.2 Machine mountings ............................................................................................. 36
4.5.3 Heat recovery ..................................................................................................... 36
5 Installation and Operating Conditions
5.1 Ensuring safety ................................................................................................................ 38
5.2 Installation conditions ....................................................................................................... 38
5.2.1 Determining location and clearances .................................................................. 38
5.2.2 Ensuring the machine room ventilation ............................................................... 39
5.2.3 Exhaust duct design ........................................................................................... 40
5.3 Operating the machine in a compressed air network ....................................................... 40
6 Installation
6.1 Ensuring safety ................................................................................................................ 41
6.2 Reporting Transport Damage ........................................................................................... 42
6.3 Connecting the machine with the compressed air network .............................................. 42
6.4 Connecting the external pressure transducer .................................................................. 42
6.5 Connecting the machine with the power supply ............................................................... 43
6.6 Options ............................................................................................................................. 44
6.6.1 Anchoring the machine ....................................................................................... 44
6.6.2 Connecting the heat recovery system ................................................................ 44
7 Initial Start-up
7.1 Ensuring safety ................................................................................................................ 46
7.2 Instructions to be observed before commissioning .......................................................... 47
7.3 Checking installation and operating conditions ................................................................ 47
7.4 Setting the overload protection cut-out ............................................................................ 48
7.5 Setting the motor overload protection switch ................................................................... 48
7.6 Pouring cooling oil into the airend .................................................................................... 48
7.7 Activating and deactivating the MODULATING control .................................................... 49
7.8 Starting the machine for the first time .............................................................................. 50
7.9 Setting the set point pressure .......................................................................................... 51
7.10 Setting the display language ............................................................................................ 51
8 Operation
8.1 Switching on and off ......................................................................................................... 52
8.1.1 Switching on ....................................................................................................... 52
8.1.2 Switching off ....................................................................................................... 52
8.2 Switching off in an emergency and switching on again .................................................... 53
8.3 Using the remote control for switching on and off ............................................................ 53
8.4 Using the timer for switching on and off ........................................................................... 54
8.5 Interpreting operation messages ...................................................................................... 55
8.6 Acknowledging alarm and warning messages ................................................................. 55
9 Fault Recognition and Rectification
9.1 Basic instructions ............................................................................................................. 57
9.2 Other faults ....................................................................................................................... 57
10 Maintenance
10.1 Ensuring safety ................................................................................................................ 59
10.2 Following the maintenance plan ....................................................................................... 60
Contents
ii
Operating Manual Screw Compressor
ASK 901824 12 E

10.2.1 Logging maintenance work ................................................................................. 60
10.2.2 Resetting maintenance interval counters ............................................................ 60
10.2.3 Regular maintenance tasks ................................................................................ 60
10.2.4 Cooling oil Change interval ................................................................................. 61
10.2.5 Regular service tasks ......................................................................................... 62
10.3 Cooler: Cleaning or Renewing the Filter Mats ................................................................. 63
10.4 Control cabinet: Clean or renew the filter mat .................................................................. 63
10.5 Cooler maintenance ......................................................................................................... 64
10.6 Maintain the heat recovery system .................................................................................. 65
10.7 Air Filter Maintenance ...................................................................................................... 66
10.8 Motor maintenance .......................................................................................................... 66
10.9 Drive belt maintenance .................................................................................................... 67
10.10 Testing the pressure relief valve ...................................................................................... 68
10.11 Check the safety shut-down due to excessive airend discharge temperature. ................ 69
10.12 Check the EMERGENCY STOP control device ............................................................... 69
10.13 Checking the cooling oil level ........................................................................................... 69
10.14 Venting the machine (de-pressurising) ............................................................................ 70
10.15 Replenish cooling oil ........................................................................................................ 72
10.15.1 Venting the machine (de-pressurising) ............................................................... 72
10.15.2 Topping up with cooling oil and trial run ............................................................. 73
10.16 Changing the cooling oil ................................................................................................... 74
10.17 Changing the oil filter ....................................................................................................... 79
10.18 Changing the oil separator cartridge ................................................................................ 80
10.19 Documenting maintenance and service work .................................................................. 83
11 Spares, Operating Materials, Service
11.1 Note the nameplate .......................................................................................................... 84
11.2 Ordering consumable parts and operating fluids/materials .............................................. 84
11.3 KAESER AIR SERVICE ................................................................................................... 84
11.4 Replacement parts for service and repair ........................................................................ 85
12 Decommissioning, Storage and Transport
12.1 De-commissioning ............................................................................................................ 88
12.1.1 Temporary de-commissioning ............................................................................ 88
12.1.2 Long-term de-commissioning ............................................................................. 88
12.2 Packing ............................................................................................................................ 89
12.3 Storage ............................................................................................................................. 89
12.4 Transport .......................................................................................................................... 89
12.4.1 Safety .................................................................................................................. 89
12.4.2 Transport with a forklift truck ............................................................................... 89
12.4.3 Transport with a hoist ......................................................................................... 90
12.5 Disposal ........................................................................................................................... 92
12.5.1 Dispose of the battery in accordance with local environmental regulations. ...... 92
13 Annex
13.1 Pipeline and instrument flow diagram (P&I diagram) ....................................................... 93
13.2 Pipeline and instrument flow diagram (P&I diagram) MODULATING control .................. 99
13.3 Dimensional drawing ........................................................................................................ 105
13.4 Electrical Diagram ............................................................................................................ 108
Contents
901824 12 E
Operating Manual Screw Compressor
ASK iii

Contents
iv
Operating Manual Screw Compressor
ASK 901824 12 E

Fig. 1 Maximum relative humidity of intake air ..................................................................................... 6
Fig. 2 Location of safety signs .............................................................................................................. 26
Fig. 3 Housing overview ....................................................................................................................... 29
Fig. 4 Machine layout ........................................................................................................................... 30
Fig. 5 Keys – overview ......................................................................................................................... 31
Fig. 6 Indicators – overview .................................................................................................................. 32
Fig. 7 RFID reader ................................................................................................................................ 33
Fig. 8 Machine mountings .................................................................................................................... 36
Fig. 9 Function of the heat recovery ..................................................................................................... 37
Fig. 10 Recommended machine placement and dimensions [mm] ........................................................ 39
Fig. 11 Compressed air pipework ........................................................................................................... 42
Fig. 12 Connecting the heat recovery system ........................................................................................ 44
Fig. 13 Airend filling port ......................................................................................................................... 49
Fig. 14 Activating and deactivating the MODULATING control .............................................................. 50
Fig. 15 Switching on and off ................................................................................................................... 52
Fig. 16 Switching off in an emergency ................................................................................................... 53
Fig. 17 Using the remote control for switching on and off ...................................................................... 54
Fig. 18 Using the timer for switching on and off ..................................................................................... 55
Fig. 19 Acknowledging messages .......................................................................................................... 56
Fig. 20 Filter mat for the air and oil cooler .............................................................................................. 63
Fig. 21 Switching cabinet ventilation ...................................................................................................... 64
Fig. 22 Filter mat for the air and oil cooler .............................................................................................. 65
Fig. 23 Air filter maintenance .................................................................................................................. 66
Fig. 24 Drive belt maintenance ............................................................................................................... 67
Fig. 25 Check the EMERGENCY STOP control device ......................................................................... 69
Fig. 26 Checking the cooling oil level ..................................................................................................... 70
Fig. 27 Venting the machine ................................................................................................................... 71
Fig. 28 Replenish cooling oil .................................................................................................................. 72
Fig. 29 Changing the cooling oil, pressuring the oil separator tank ........................................................ 75
Fig. 30 Changing the cooling oil Oil separator tank ................................................................................ 76
Fig. 31 Changing the cooling oil Oil cooler ............................................................................................. 76
Fig. 32 Changing the cooling oil Compressor block ............................................................................... 77
Fig. 33 Changing the cooling oil Heat recovery ...................................................................................... 78
Fig. 34 Changing the cooling oil Filling with cooling oil .......................................................................... 78
Fig. 35 Changing the oil filter .................................................................................................................. 79
Fig. 36 Changing the oil separator cartridge .......................................................................................... 81
Fig. 37 Transporting with a forklift truck ................................................................................................. 90
Fig. 38 Transporting with a crane ........................................................................................................... 91
Fig. 39 Battery labelling .......................................................................................................................... 92
List of Illustrations
901824 12 E
Operating Manual Screw Compressor
ASK v

List of Illustrations
vi
Operating Manual Screw Compressor
ASK 901824 12 E

Tab. 1 Danger levels and their definition (personal injury) .................................................................... 1
Tab. 2 Danger levels and their definition (damage to property) ............................................................ 2
Tab. 3 Nameplate .................................................................................................................................. 4
Tab. 4 Options ....................................................................................................................................... 4
Tab. 5 Mass ........................................................................................................................................... 5
Tab. 6 Temperature ............................................................................................................................... 5
Tab. 7 Ambient conditions ..................................................................................................................... 5
Tab. 8 Overview Ventilation (50Hz) ....................................................................................................... 6
Tab. 9 Overview Ventilation (60Hz) ....................................................................................................... 6
Tab. 10 Pressure relief valve activating pressure (50Hz) ........................................................................ 7
Tab. 11 Pressure relief valve activating pressure (60Hz) ........................................................................ 7
Tab. 12 Flow rate (50Hz) ......................................................................................................................... 7
Tab. 13 Flow rate (60 Hz) ........................................................................................................................ 7
Tab. 14 Cooling oil recommendation ....................................................................................................... 8
Tab. 15 Cooling oil recommendation (food processing) .......................................................................... 8
Tab. 16 Cooling oil recommendation (machines for snow cannons) ....................................................... 9
Tab. 17 Cooling oil charge quantity ........................................................................................................ 10
Tab. 18 Cooling oil charge (Option W2) .................................................................................................. 10
Tab. 19 Cooling oil charge (option W3) ................................................................................................... 10
Tab. 20 Compressor drive motor ............................................................................................................. 10
Tab. 21 Compressor drive motor: Rated speed for 50 Hz ....................................................................... 10
Tab. 22 Compressor drive motor: Rated speed for 60 Hz ....................................................................... 10
Tab. 23 Fan motor (50Hz) ....................................................................................................................... 11
Tab. 24 Fan motor (60Hz) ....................................................................................................................... 11
Tab. 25 Noise emission [dB(A)] ............................................................................................................... 11
Tab. 26 Supply details 200V / 3 / 50Hz ................................................................................................... 12
Tab. 27 Supply details 230V / 3 / 50Hz ................................................................................................... 13
Tab. 28 Supply details 400V / 3 / 50Hz ................................................................................................... 13
Tab. 29 Network conditions at 400V / 3 / 50Hz ....................................................................................... 13
Tab. 30 Supply details 230V / 3 / 60Hz ................................................................................................... 13
Tab. 31 Supply details 380V / 3 / 60Hz ................................................................................................... 14
Tab. 32 Supply details 440V / 3 / 60Hz ................................................................................................... 14
Tab. 33 Supply details 460V / 3 / 60Hz ................................................................................................... 14
Tab. 34 Heat recovery: Individual design data ........................................................................................ 15
Tab. 35 Specification: Heat exchanger (Option W2/W3) ......................................................................... 15
Tab. 36 Quality of the heat receiving medium ......................................................................................... 16
Tab. 37 Heat capacity (Option W2/W3) ................................................................................................... 16
Tab. 38 Flow rate / pressure drop (option W2) ........................................................................................ 16
Tab. 39 Flow rate / pressure drop (option W3) ........................................................................................ 16
Tab. 40 Inspection intervals according to Ordinance on Industrial Safety and Health ............................ 20
Tab. 41 Danger Areas ............................................................................................................................. 25
Tab. 42 Category and Performance Level ............................................................................................... 25
Tab. 43 Safety signs ................................................................................................................................ 26
Tab. 44 Keys ........................................................................................................................................... 31
Tab. 45 LEDs ........................................................................................................................................... 32
Tab. 46 RFID reader ................................................................................................................................ 33
Tab. 47 Energy-saving control modes ..................................................................................................... 35
Tab. 48 Components ............................................................................................................................... 36
Tab. 49 Re-commissioning after storage ................................................................................................. 47
Tab. 50 Installation conditions checklist .................................................................................................. 47
Tab. 51 Activating and deactivating the MODULATING control .............................................................. 49
Tab. 52 Machine identification ................................................................................................................. 54
Tab. 53 Remote control identification ...................................................................................................... 54
Tab. 54 Machine identification ................................................................................................................. 55
List of Tables
901824 12 E
Operating Manual Screw Compressor
ASK vii

Tab. 55 Other faults and remedies .......................................................................................................... 57
Tab. 56 Advise others that the machine is being serviced. ..................................................................... 59
Tab. 57 Regular maintenance tasks ........................................................................................................ 61
Tab. 58 Cooling oil Change intervals ....................................................................................................... 62
Tab. 59 Regular service tasks ................................................................................................................. 62
Tab. 60 Logged maintenance tasks ........................................................................................................ 83
Tab. 61 Consumable parts ...................................................................................................................... 84
List of Tables
viii
Operating Manual Screw Compressor
ASK 901824 12 E

1 Regarding this document
1.1 Using this document
The operating manual is a component of the product. It describes the machine as it was at the time
of first delivery after manufacture.
➤ Keep the operating manual in a safe place throughout the life of the machine.
➤ Supply any successive owner or user with this operating manual.
➤ Please insert any amendment or revision of the operating manual sent to you.
➤ Enter details from the machine nameplate and individual items of equipment in the table in
chapter 2.
1.2 Further documents
Further documents included with this operating manual are:
■ Certificate of acceptance / operating instructions for the pressure vessel
■ Declaration of Conformity in accordance with the applicable directive
■ Operating manual for SIGMA CONTROL 2
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 operating manual is protected by copyright. Any queries regarding the use or duplication of
this documentation should be referred to KAESER. Correct use of information will be fully suppor‐
ted.
1.4 Symbols and labels
➤ Please note the symbols and labels used in this document.
1.4.1 Warnings
Warning notices indicate dangers that may result in injury when disregarded.
Warning notices indicate three levels of danger identified by the corresponding signal word:
Signal term Meaning Consequences of non-compliance
DANGER Warns of an imminent threat of danger Will result in death or severe injury
WARNING Warns of possible danger May result in death or severe injury
CAUTION Warns of a potentially dangerous situation May result in a moderate physical injury
Tab. 1 Danger levels and their definition (personal injury)
Warning notices preceding a chapter apply to the entire chapter, including all sub-sections.
1 Regarding this document
1.1 Using this document
901824 12 E
Operating Manual Screw Compressor
ASK 1

Example:
DANGER
These show the kind of danger and its source.
The possible consequences of ignoring a warning are shown here.
If you ignore the warning notice, the "DANGER" signal word indicates a lethal or severe in‐
jury will occur.
➤ The measures required to protect yourself from danger are shown here.
Warning notes referring to a sub-section or the subsequent action are integrated into the procedure
and numbered as an action.
Example:
1. WARNING!
These show the kind of danger and its source.
The possible consequences of ignoring a warning are shown here.
If you ignore the warning notice, the "WARNING" signal word indicates that a lethal or severe
injury may occur.
➤ The measures required to protect yourself from danger are shown here.
2. Always read and comply with warning instructions.
1.4.2 Potential damage warnings
Contrary to the warnings shown above, damage warnings do not indicate a potential personal in‐
jury.
Warning notices for damages are identified by their signal term.
Signal term Meaning Consequences of non-compliance
NOTE Warns of a potentially dangerous situation Damage to property is possible
Tab. 2 Danger levels and their definition (damage to property)
Example:
NOTICE
These show the kind of danger and its source.
Potential effects when ignoring the warning are indicated here.
➤ The protective measures against the damages are shown here.
➤ Carefully read and fully comply with warnings against damages.
1.4.3 Other alerts and their symbols
This symbol identifies particularly important information.
1 Regarding this document
1.4 Symbols and labels
2
Operating Manual Screw Compressor
ASK 901824 12 E

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 denotes lists of actions comprising one stage of a task.
Operating instructions with several steps are numbered in the sequence of the operating steps.
Information relating to one option only are marked with an option code (e.g., H1 indicates that
this section applies only to machines with screw-in machine feet). Option codes used in this
operating manual are explained in chapter 2.2.
Information referring to potential problems are identified by a question mark.
The cause is named in the help text ...
➤ ... as is a solution.
This symbol identifies important information or measures regarding the protection of the envi‐
ronment.
Further information Further subjects are introduced here.
1 Regarding this document
1.4 Symbols and labels
901824 12 E
Operating Manual Screw Compressor
ASK 3
Option H1

2 Technical Specifications
2.1 Nameplate
The model designation and important technical information are given on the machine's nameplate.
The nameplate is located on the outside of the machine:
■ above the cooler, or
■ on the rear of the machine.
➤ Enter here the nameplate data as a reference:
Feature Value
Rotary screw compressor
Material no.
Serial no.
Year of manufacture
Rated power
Rated motor speed
Maximum working pressure
Ambient temperature
Tab. 3 Nameplate
2.2 Options
The table contains a list of possible options. The options for this machine are shown near the
nameplate.
➤ Enter options here as a reference:
Option Option code Provided?
MODULATINGcontrol C1
SIGMA CONTROL 2:
Connection to control technology available
C3 —
IT 3-phase supply C35 —
SIGMA CONTROL 2:
Connection to control technology not provided
C48 ✓
Bolt-down machine mounts H1
Air cooling K1 ✓
Transformer power supply for refrigeration dryer T2 —
Heat recovery ΔT=25 K W2
Heat recovery ΔT=55 K W3
Provided: ✓
not available: —
Tab. 4 Options
2 Technical Specifications
2.1 Nameplate
4
Operating Manual Screw Compressor
ASK 901824 12 E

2.3 Mass
The values shown are maximum values. Actual mass of individual machines are dependent on
equipment fitted.
ASK 28 ASK 34 ASK 40
Mass [kg] 485 505 525
Tab. 5 Mass
2.4 Temperature
ASK 28 ASK 34 ASK 40
Minimum cut-in tempera‐
ture [°C]
3 3 3
Typical airend discharge
temperature during oper‐
ation [°C]
65 – 100 65 – 100 65 – 100
Maximum airend dis‐
charge temperature (au‐
tomatic safety shut-down)
[°C]
110 110 110
Tab. 6 Temperature
2.5 Ambient conditions
ASK 28 ASK 34 ASK 40
Maximum elevation amsl
[m]
1000 1000 1000
Permissible ambient tem‐
perature [°C]
3 – 45 3 – 45 3 – 45
Cooling air temperature
[°C]
3 – 45 3 – 45 3 – 45
Intake air temperature
[°C]
3 – 45 3 – 45 3 – 45
* Higher altitudes are permissible only after consultation with the manufacturer.
Tab. 7 Ambient conditions
2 Technical Specifications
2.3 Mass
901824 12 E
Operating Manual Screw Compressor
ASK 5

Fig. 1 Maximum relative humidity of intake air
TIntake air temperature [°C]
HMaximum relative humidity of intake air [%]
2.6 Ventilation
The values given are minimum guide values.
Mains frequency: 50 Hz
ASK 28 ASK 34 ASK 40
Inlet aperture Z see fig‐
ure 10 [m2]
0.5 0.5 0.6
Forced ventilation with
exhaust fan:
Flow rate [m3/h] at 100
Pa
6000 7500 9000
Tab. 8 Overview Ventilation (50Hz)
Mains frequency: 60 Hz
ASK 28 ASK 34 ASK 40
Inlet aperture Z see fig‐
ure 10 [m2]
0.5 0.5 0.6
Forced ventilation with
exhaust fan:
Flow rate [m3/h] at 100
Pa
6000 7500 9000
Tab. 9 Overview Ventilation (60Hz)
2.7 Pressure
Maximum working pressure: (see nameplate)
2 Technical Specifications
2.6 Ventilation
6
Operating Manual Screw Compressor
ASK 901824 12 E

Pressure relief valve activating pressure at 50 Hz [bar]:
Maximum working over‐
pressure [bar]
ASK 28 ASK 34 ASK 40
8.0 10 10 10
11.0 13 13 13
15.0 16* 16* 16*
* China: 15.9
Tab. 10 Pressure relief valve activating pressure (50Hz)
Pressure relief valve activating pressure at 60 Hz [bar]:
Maximum working over‐
pressure [bar]
ASK 28 ASK 34 ASK 40
8.5 10 10 10
11.0 13 13 13
15.0 16 16 16
Tab. 11 Pressure relief valve activating pressure (60Hz)
2.8 Flow rate (constant delivery volume relative to intake conditions)
Flow rate [m3/min] at 50 Hz mains frequency:
Max. working pres‐
sure [bar]
ASK 28 ASK 34 ASK 40
8.0 2.85 3.50 4.05
11.0 2.38 2.98 3.50
15.0 1.90 2.47 2.90
Flow rate as per ISO 1217:2009. Annex C
Tab. 12 Flow rate (50Hz)
Flow rate [m3/min] at 60 Hz mains frequency:
Max. working pres‐
sure [bar]
ASK 28 ASK 34 ASK 40
8.5 2.80 3.40 4.00
11.0 2.40 2.90 3.45
15.0 1.82 2.40 2.83
Flow rate as per ISO 1217:2009. Annex C
Tab. 13 Flow rate (60 Hz)
2 Technical Specifications
2.8 Flow rate (constant delivery volume relative to intake conditions)
901824 12 E
Operating Manual Screw Compressor
ASK 7

2.9 Cooling oil recommendation
A sticker showing the type of oil used is located near the oil separator tank filler.
Information on ordering cooling oil is found in chapter 11.
Cooling oils for general applications
SIGMA FLUID
MOL S-460 S-570
Description Mineral oil Silicone-free
synthetic oil
Synthetic oil
Application Standard oil for all appli‐
cations except in con‐
nection with foodstuffs.
Particularly suitable for
machines with a low du‐
ty cycle.
Standard oil for all applica‐
tions except in connection
with foodstuffs.
Particularly suitable for ma‐
chines with a high duty cycle.
Not suitable for East- / South-
East-Asian countries.
Special oil for ambient
conditions with high tem‐
peratures and humidity.
Standard oil for all appli‐
cations except in connec‐
tion with foodstuffs.
Particularly suitable for
machines with a high duty
cycle.
Approval — — —
Viscosity at
40 °C
44 mm2/s
(DIN 51562–1)
45 mm2/s
(D 445; ASTM test)
52.8 mm2/s
(D 445; ASTM test)
Viscosity at
100 °C
6.8 mm2/s
(DIN 51562-1)
7.2 mm2/s
(D 445; ASTM test)
8.0 mm2/s
(D 445; ASTM test)
Flash point 220 °C
(ISO 2592)
238 °C
(D 92; ASTM test)
258 °C
(D 92; ASTM test)
Density at
15 °C
—864 kg/m3
(ISO 12185)
0.869 kg/l
(D 1298; ASTM test)
Pour point –33 C
(ISO 3016)
–46 ℃
(D 97; ASTM test)
–54 ℃
(D 97; ASTM test)
Demulsibility
at 54 °C
— 40/40/0/10 min
(D 1401; ASTM test)
15 min
(D 1401; ASTM test)
Tab. 14 Cooling oil recommendation
Cooling oils for applications in food processing
SIGMA FLUID
FG-460 FG-680
Description Synthetic oil Synthetic oil
Application Specifically for machines in applica‐
tions where the compressed air
may come into contact with food‐
stuff.
Special oil for ambient conditions with
high temperatures and humidity.
Specifically for machines in applications
where the compressed air may come into
contact with foodstuff.
2 Technical Specifications
2.9 Cooling oil recommendation
8
Operating Manual Screw Compressor
ASK 901824 12 E

SIGMA FLUID
FG-460 FG-680
Approval USDA H-1, NSF
Approved for the manufacture of
food packaging, meat and poultry
processing and other food process‐
ing applications.
USDA H-1, NSF
Approved for the manufacture of food
packaging, meat and poultry processing
and other food processing applications.
Viscosity at 40 °C 50.7 mm2/s
(D 445; ASTM test)
70.0 mm2/s
(D 445; ASTM test)
Viscosity at
100 °C
8.2 mm2/s
(D 445; ASTM test)
10.4 mm2/s
(D 445; ASTM test)
Flash point 245 °C
(D 92; ASTM test)
245 °C
(D 92; ASTM test)
Density at 15 °C — —
Pour point — —
Demulsibility at
54 °C
— —
Tab. 15 Cooling oil recommendation (food processing)
Cooling oils for the operation with snow cannons
SIGMA FLUID
PANOLIN HLP SYNTH 46
Description Saturated synthetic ester with additives (mineral oil free).
Easily biologically degradable as per OECD criteria.
Application Specifically designed for machines intended for the operation with snow
cannons.
Approval —
Viscosity at 40 °C 47 mm2/s
Viscosity at
100 °C
8.1 mm2/s
Flash point >210 °C
Density at 15 °C 0.92 g/ml
Pour point –35 °C
Demulsibility at 54 °C —
Tab. 16 Cooling oil recommendation (machines for snow cannons)
2.10 Cooling oil charge quantity
The cooling oil charge quantity depends on the optional heat recovery system. For machines with
options W2 or W3, the volume required additionally for the heat recovery must be added to the
charge.
2 Technical Specifications
2.10 Cooling oil charge quantity
901824 12 E
Operating Manual Screw Compressor
ASK 9

ASK 28 ASK 34 ASK 40
Fluid volume* [l] 11 11 11
Topping up volume [l]
(minimum–maximum)
2 2 2
* plus the cooling oil volume of the heat recovery system.
Tab. 17 Cooling oil charge quantity
Heat recovery
ASK 28 ASK 34 ASK 40
Additional charge vol‐
ume [l]
1.2 1.2 1.2
Tab. 18 Cooling oil charge (Option W2)
ASK 28 ASK 34 ASK 40
Additional charge vol‐
ume [l]
1.2 1.2 1.2
Tab. 19 Cooling oil charge (option W3)
2.11 Motors and power
2.11.1 Compressor drive motor
ASK 28 ASK 34 ASK 40
Rated power [kW] 15.0 18.5 22.0
Enclosure protection IP 55 IP 55 IP 55
Tab. 20 Compressor drive motor
Rated speed [min−1] (Mains frequency: 50 Hz):
Max. working pres‐
sure [bar]
ASK 28 ASK 34 ASK 40
8.0 2960 2960 2960
11.0 2960 2960 2960
15.0 2960 2960 2960
Tab. 21 Compressor drive motor: Rated speed for 50 Hz
Rated speed [min−1] (Mains frequency: 60 Hz):
Max. working pres‐
sure [bar]
ASK 28 ASK 34 ASK 40
8.5 3565 3565 3565
2 Technical Specifications
2.11 Motors and power
10
Operating Manual Screw Compressor
ASK 901824 12 E
Option W2/W3
Option W2
Option W3