Standard Scope of Supply:
The SF6-22 Multcore models are air cooled, silenced, oil free scroll compressor packages.
The air quality from all SF Scroll oil free compressors is TUV certified to ISO8573-1:2001 Part 1 to “Class 0” in terms total oil content.
Scope of Supply
- Two, three or four scroll compressor modules per machine
- IP55 totally enclosed fan cooled motors
- Elektronikon control module
- Belt driven scroll elements
- Emergency stop button
- Aftercooler with moisture separator
- Regulating system with VFT (Variable Flow Technology)
- Automatic condensate drain
- Integrated refrigerant dryer
Compression Element Module
| SF6-15 multicore compressors each has a mixture of compressor modules sized as follows: | |
| SF 6 = 2 modules | (2.2 kW + 3.7 kW) |
| SF 8 = 2 modules | (2 x 3.7 kW) |
| SF 11 = 3 modules | (3 x 3.7 kW) |
| SF 15 = 4 modules | (4 x 3.7 kW) |
| SF 17 = 3 modules | (3 x 5.5 kW) |
| SF22 = 4 modules | (4 x 5.5 kW) |
The Elektronikon control system matches the compressor capacity to the demand by starting and stopping modules as necessary to meet the demand. Running hours are equalised across the modules.
Compression & Drive Arrangement
Each Scroll element is belt driven from a TEFC, IP55, class F electric motor. The element consists of a fixed scroll and an orbiting scroll. The orbiting scroll seals off the inlet port and progressively compresses air into a smaller volume.
The result is a continuous flow of oil free and pulse free compressed air that leaves through a discharge port at the centre of the element.
The tension within the belts can be easily adjusted via a sliding frame.
Compression Element Cooling
Compression elements incorporate a cooling fan mounted on the drive shaft of the element.
Aftercooler
All units include an air-blast aftercooler with a separate cooling fan.
Flow Diagram
Air at inlet pressure enters the compression chamber at the exterior side of the scroll element. As the scroll continues to orbit, the air is progressively compressed into an increasingly smaller pocket. The compressed air is then discharged from the element, through the air cooler and check valve. This process provides a continuous flow of pulse-free compressed air.
Air System
The air system includes:
- Dry-type air intake filters for each element
- Check valve on each module
- Safety valve on each module
- Common air blast aftercooler with cooling fan
- Water separator
- Manual drain for condensate
- Automatic drain for condensate
- Integrated refrigerant dryer
Control Cubicle
Compressors are equipped with a control cubicle containing:
- Motor starters
- Transformers
- Emergency stop
- Elektronikon control, regulation, safety and indication panel
- All wiring
Control and Regulation
SF6-15 multicore compressors are equipped with the Variable Flow Technology (VFT) providing efficient start / stop control. The compressor capacity matches the needs of the application by starting and stopping compressor modules as necessary to save energy. The Elektronikon controller equalises the running hours across the compression element and ensures that they do not start simultaneously.
Elektronikon Controller
The Elektronikon controller regulates compressor operation and displays and monitors the following:
| Control Buttons | Indication | Alarm | Trip |
| Start Button | X | ||
| Stop Button | X | ||
| Emergency Stop Button | X | X | |
| Reset / Test Button | X | ||
| Operating Parameters | |||
| Voltage on | X | ||
| Automatic operation | X | ||
| Delivery Air | X | ||
| Total Hours Run | X | ||
| Air filter | X | ||
| Sensor error | X | ||
| High element temp outlet | X | X | X |
| Drive motor / fan overload | X | X | X |
| Emergency stop | X | X | |
| Digial Input Commands | |||
| Start | X | ||
| Programmed stop | X | ||
| Emergancy stop | X | ||
| Max number starts | X | ||
| Digital Output Compressor Status | |||
| Automatic Operation | X | ||
| General Warning | X | ||
| General Shutdown | X | ||
Features & Benefits
| Feature | Benefit |
| Scroll element | No metal to metal contact between the scrolls, therefore no need for lubrication. |
| Pure oil free “Class 0” air | No oil in the compression chamber, high quality oil free air. |
| Energy efficient EEF1 motors | Reduction of energy consumption |
| Start / Stop regulation | Energy efficient regulation |
| Super silent acoustic canopy | Reduced sound levels; low as 53dB(A) |
| Belt driven scroll element | Eliminating the need for a gearbox |