1. Introduction
Thank you for choosing the Scheppach HC120DC 100L Oil-Lubricated Air Compressor. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new air compressor. Please read this manual thoroughly before initial use and keep it for future reference. This compressor is designed for versatile use in home workshops, garages, and various professional applications, providing reliable compressed air for a wide range of pneumatic tools.
2. Safety Instructions
WARNING: Failure to follow these safety instructions may result in serious injury, electric shock, fire, or property damage.
- Always read and understand the entire manual before operating the compressor.
- Wear appropriate personal protective equipment, including safety glasses or goggles, hearing protection, and sturdy footwear.
- Ensure the compressor is placed on a stable, level surface in a well-ventilated area.
- Do not operate the compressor in damp or wet conditions, or in the presence of flammable liquids or gases.
- Before performing any maintenance, adjustments, or cleaning, always disconnect the compressor from the power supply and ensure the tank is depressurized.
- Keep children and unauthorized persons away from the operating compressor.
- Regularly check the pressure relief valve for proper function. Do not tamper with or disable safety devices.
- Ensure the electrical supply matches the voltage requirements specified on the compressor's rating plate.
- Never direct compressed air at people or animals.
- Drain condensation from the air tank daily to prevent corrosion and maintain tank integrity.
3. Product Overview
The Scheppach HC120DC air compressor features a robust design for reliable performance. Familiarize yourself with its main components:
This image displays the complete Scheppach HC120DC air compressor, highlighting its blue 100-liter tank, the motor and pump assembly on top, wheels for portability, and the integrated handle.
- Air Tank (100 Liters): Stores compressed air.
- Motor (3.0 HP / 2.2 kW): Powers the compressor pump.
- Double Cylinder Pump: Efficiently compresses air.
- Pressure Switch: Automatically starts and stops the motor to maintain tank pressure.
- Pressure Regulator: Allows adjustment of the output air pressure to suit the tool being used.
- Pressure Gauges: Display tank pressure and regulated output pressure.
- Quick Connect Couplings (x2): For fast and easy connection of air tools.
- Wheels and Handle: Provide mobility for the unit.
- Drain Valve: Located at the bottom of the tank for draining condensation.
- Oil Fill Cap/Sight Glass: For checking and adding compressor oil.
- Air Filter: Filters incoming air to protect the pump.
- Safety Valve: Releases excess pressure if the pressure switch fails.
This image provides a detailed view of the compressor's control panel, showing the two pressure gauges (one for tank pressure, one for regulated output pressure) and the two quick-connect air outlets.
4. Setup
Follow these steps to prepare your compressor for first use:
- Unpacking: Carefully remove the compressor from its packaging. Inspect for any shipping damage. Report any damage to your supplier immediately.
- Attach Wheels and Handle: Securely attach the wheels and handle using the provided hardware. Refer to the assembly diagram in the separate assembly guide if necessary.
- Check Oil Level: The compressor is oil-lubricated. Before first use, check the oil level using the sight glass or dipstick. Ensure the oil level is between the minimum and maximum marks. If low, add suitable compressor oil (refer to specifications for oil type).
- Install Air Filter: Attach the air filter to the designated inlet port on the pump. This protects the pump from dust and debris.
- Electrical Connection: Connect the compressor to a grounded 230 Volt power outlet. Ensure the circuit can handle the compressor's power requirements (2.2 kW). Avoid using extension cords if possible; if one is necessary, ensure it is heavy-duty and rated for the compressor's power.
- Initial Break-in (Important for Oil-Lubricated Compressors): For the first 30 minutes of operation, run the compressor with the drain valve fully open. This allows the internal components to seat properly without building up pressure. After 30 minutes, close the drain valve and allow the tank to fill.
5. Operating Instructions
Operating your Scheppach HC120DC compressor is straightforward:
- Power On: Ensure the compressor is plugged in. Flip the main power switch to the 'ON' position. The motor will start, and the tank will begin to fill with air.
- Monitor Pressure: Observe the tank pressure gauge. The compressor will automatically shut off once the maximum tank pressure (10 bar) is reached. It will restart automatically when the tank pressure drops below a preset minimum.
- Adjust Output Pressure: Use the pressure regulator knob to set the desired working pressure for your air tool. The regulated output pressure will be displayed on the second pressure gauge.
- Connect Air Tool: Attach your pneumatic tool to one of the quick-connect couplings. Ensure a secure connection.
- Begin Work: You can now operate your air tool.
- Shut Down: When finished, turn the main power switch to the 'OFF' position. Disconnect the air tool.
- Depressurize and Drain: Open the drain valve at the bottom of the tank to release any remaining air pressure and drain accumulated condensation. This is crucial for preventing rust and extending tank life. Close the drain valve after depressurizing and draining.
This image shows a person using the Scheppach HC120DC air compressor to inflate a car tire, demonstrating a common application for the unit.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your compressor:
- Daily/After Each Use:
- Drain condensation from the air tank.
- Check oil level and top up if necessary.
- Weekly/Every 10 Hours of Operation:
- Clean the air filter. Replace if heavily soiled or damaged.
- Inspect all hoses and fittings for leaks or damage.
- Monthly/Every 50 Hours of Operation:
- Change the compressor oil. Refer to the specifications for the correct oil type.
- Check the tightness of all bolts and nuts.
- Test the safety valve by pulling its ring briefly while the tank is pressurized. Air should escape.
- Annually: Have the compressor inspected by a qualified service technician.
Always disconnect power and depressurize the tank before performing any maintenance.
7. Troubleshooting
Here are solutions to common issues you might encounter:
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor does not start | No power supply; Power switch off; Thermal overload activated; Low voltage. | Check power connection and fuse; Turn power switch on; Allow motor to cool and reset; Ensure proper voltage supply. |
| Low air pressure / Slow tank fill | Air leaks in hoses/fittings; Clogged air filter; Worn piston rings/valves; Insufficient oil. | Check and tighten connections, replace damaged parts; Clean/replace air filter; Contact service for pump repair; Check and add oil. |
| Excessive noise or vibration | Loose components; Compressor not on level surface; Worn bearings. | Tighten all bolts and nuts; Place on a stable, level surface; Contact service for inspection. |
| Oil leakage | Loose oil drain plug; Damaged seals; Overfilled oil. | Tighten drain plug; Contact service for seal replacement; Drain excess oil. |
| Safety valve activates frequently | Pressure switch faulty; Regulator set too high. | Contact service for pressure switch replacement; Adjust regulator to desired working pressure. |
If you encounter problems not listed here or if the suggested solutions do not resolve the issue, please contact Scheppach customer support or a qualified service technician.
8. Specifications
| Brand | Scheppach |
| Model | SC-HC120DC |
| Tank Volume | 100 Liters |
| Motor Power | 3.0 HP / 2.2 kW |
| Max. Operating Pressure | 10 bar |
| Air Delivery (Capacity) | 412 liters per minute |
| Voltage | 230 Volts |
| Noise Level | 97 dB |
| Weight | 52 Kilograms |
| Special Feature | Double cylinder |
| Power Source | Compressed Air (Electric Motor Driven) |
Note: Product specifications are subject to change without prior notice for improvement.
9. Warranty and Support
For warranty information, please refer to the documentation included with your purchase or visit the official Scheppach website. Scheppach provides comprehensive customer support for its products.
If you require technical assistance, spare parts, or have questions regarding your compressor, please contact Scheppach customer service directly. Ensure you have your model number (SC-HC120DC) and purchase date available when contacting support.
Scheppach Official Website: www.scheppach.com
