1. Kaeser Direct Drive ESD Rotary Screw Compressor

2. Overview of Features Optimized specific power
Redesigned air inlet duct
Sigma Control 2™ featuring web browser connectivity and energy control strategies for improved part load efficiency
Kaeser designed, high efficiency moisture separator
Enhanced package layout supports easier connectivity, service, and system integration
SFC includes Siemens’ latest variable frequency drive technology
Variable speed fan motor for cooling fluid fan
Remote grease fittings for drive motor and fan motor bearings
© Kaeser Compressors, Inc., USA / V2.0 /

3. Energy Saving Features
Sigma Profile airend design
1:1 direct drive - no losses
Excellent motor efficiencies
Minimal pressure drop across separator, piping, valves, and cooler
Heat recovery ready
© Kaeser Compressors, Inc., USA / V2.0 /

4. Sigma Profile and Specific Power Advantage
Optimized Sigma Profile 5:6 design provides enhanced specific power
Larger displacement
Greater flexibility in pressure selection
© Kaeser Compressors, Inc., USA / V2.0 /

5. Sigma Profile and Specific Power Advantage
Precision ground finish on rotors creates less fluid friction and shear
Closer tolerances and unequal diameter rotors significantly reduce back-flow
© Kaeser Compressors, Inc., USA / V2.0 /

6. Standard Drive Motor Features
Premium efficiency for lower input kW
TEFC design protects windings from dirt, dust, moisture, etc.
Class F insulation
EISA compliant
Anti-vibration motor mounts
Wye-delta soft start
© Kaeser Compressors, Inc., USA / V2.0 /

7. Direct Drive Coupling Most efficient drive system 1:1 direct drive
Minimizes radial loads on motor and airend
No gears means no gear noise or loss of efficiency
Cast iron spool piece assures perfect alignment
Requires no maintenance
© Kaeser Compressors, Inc., USA / V2.0 /

8. Air Inlet Duct and Air Filter
Air filter (easy access from above or below, no tools required)
Air inlet
Sigma Control 2™ (with percent air filter contamination)
© Kaeser Compressors, Inc., USA / V2.0 /

9. Fluid Separator Tank
New tangential air inlet improves air/fluid separation
Separator tank cover pivots for easy element access
© Kaeser Compressors, Inc., USA / V2.0 /

10. Sigma Control 2™ Large display Advanced communication features
RFID key ensures authorized access
© Kaeser Compressors, Inc., USA / V2.0 /

11. Sigma Control 2™ Communications Access
Standard:
Ethernet (web browser access)
RS 485 I/O Bus
RS 485 USS Interface
Optional:
Profibus (shown)
Modbus
Device net
Profinet*
* Available early 2012
© Kaeser Compressors, Inc., USA / V2.0 /

12. Sigma Control 2™ with SD Card
PC updates
Back-up user settings
Performance data storage
© Kaeser Compressors, Inc., USA / V2.0 /

13. Sigma Control 2™ Energy Saving Options
3 x PT100
Dynamic control – Monitors motor winding temperature to minimize idle time
Vario control
Quadro control
Dual control
Continuous
© Kaeser Compressors, Inc., USA / V2.0 /

14. New High Efficiency Moisture Separator with Eco-Drain
Efficient condensate removal with low pressure drop
No air loss Eco-Drain with alarm feedback to Sigma Control 2™
Stainless steel construction
© Kaeser Compressors, Inc., USA / V2.0 /

15. Service Accessibility
Single latch e-z access removable panels (left-side)
Wide-opening doors
No central pillar on main service access
External grease fittings for all motors
Easy motor access via removable pillar
© Kaeser Compressors, Inc., USA / V2.0 /

16. Air-Cooled Unit: Front View
Fluid cooler fan
Aftercooler fan
Variable speed fluid cooler motor:
Saves energy
Improved temperature control
Separate fixed-speed aftercooler motor
Individual fan shrouds
© Kaeser Compressors, Inc., USA / V2.0 /

17. Air-Cooled Unit: Back View
Aftercooler
Fluid cooler
Fluid separator tank
Moisture separator with Eco-Drain
© Kaeser Compressors, Inc., USA / V2.0 /

18. Water-Cooled Unit: Back View
Standard: Stainless steel, plate-type heat exchangers
Optional: Shell and tube heat exchangers
Special materials available
Disassembles for cleaning
Shown with optional shell and tube heat exchangers
© Kaeser Compressors, Inc., USA / V2.0 /

19. SFC Units Package Layout
Variable speed drive motor:
No add-on cabinet
Short drive motor cables
Clean wire runs
Variable speed fan motor:
Speed determined by fluid temperature
Allows further power reduction at lower inlet temperatures
Sinamics drive – Latest Siemens drive
© Kaeser Compressors, Inc., USA / V2.0 /