1. Introduction
This manual provides essential information for the safe and efficient operation of your BITMAIN Antminer S21 Pro 220T. Please read this manual thoroughly before setup and operation to ensure proper usage and to prevent damage to the device or injury.
Important Safety Notice:
- Ensure correct input voltage. Incorrect voltage can cause severe damage to the server.
- The actual hashrate, power on wall, and power efficiency may fluctuate. Refer to specifications for typical values.
- Operate the device within specified environmental conditions to maintain performance and longevity.
2. Product Overview
The BITMAIN Antminer S21 Pro 220T is an air-cooled Bitcoin miner designed for SHA256 algorithm cryptocurrencies such as BTC, BCH, and BSV. It features a typical hashrate of 220 TH/s and a power efficiency of 15 J/TH.
Figure 1: Front view of the Antminer S21 Pro 220T, showing the dual cooling fans and internal components.
Figure 2: Rear view of the Antminer S21 Pro 220T, highlighting the control board, network port, and power input area.
3. Setup Instructions
- Unpacking: Carefully remove the Antminer from its packaging. Inspect for any visible damage.
- Placement: Place the miner in a well-ventilated area. Ensure adequate space around the intake and exhaust fans for optimal airflow. Avoid placing it in dusty or humid environments.
- Power Connection: Connect the provided power supply unit (PSU) to the miner. Ensure the power cord is securely connected to the PSU and then to a compatible 220-277V power outlet. Verify the input voltage matches the miner's requirements to prevent damage.
- Network Connection: Connect an RJ45 Ethernet cable from your network router/switch to the Ethernet port on the miner's control board.
- Initial Power On: Once all connections are secure, power on the miner. The fans will start, and indicator lights on the control board will illuminate.
- Configuration: Access the miner's web interface via its IP address (usually found using an IP scanner tool on your network). Log in with default credentials (refer to manufacturer's documentation for specifics). Configure your mining pool settings and wallet address.
4. Operating Instructions
- Monitoring: Regularly monitor the miner's status through its web interface. Check hashrate, temperature, and fan speed to ensure optimal performance.
- Environmental Conditions: Maintain an operating temperature between -20°C and 45°C. For altitudes between 900m and 2000m, the maximum operating temperature decreases by 1°C for every 300m increase in altitude. Maintain non-condensing humidity between 10% and 90% RH.
- Shutdown: To safely shut down the miner, use the software shutdown option in the web interface if available, or simply disconnect the power after ensuring all mining processes have ceased.
5. Maintenance
- Dust Removal: Periodically clean the miner, especially the cooling fans and heatsinks, to prevent dust buildup. Dust can impede airflow and lead to overheating. Use compressed air for best results.
- Firmware Updates: Check the official BITMAIN website for firmware updates. Keeping the firmware updated can improve performance, stability, and security. Follow manufacturer's instructions carefully during updates.
- Cable Inspection: Regularly inspect all power and network cables for any signs of wear or damage. Replace damaged cables immediately.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Miner not powering on | No power supply, incorrect voltage, faulty power cable. | Check power connections, ensure correct 220-277V input, test power cable. |
| Low hashrate | Overheating, network issues, outdated firmware, incorrect pool settings. | Ensure proper ventilation, check network connectivity, update firmware, verify pool configuration. |
| Network connection issues | Faulty Ethernet cable, incorrect network settings, router issues. | Replace Ethernet cable, check miner's IP configuration, restart router. |
| Overheating | Poor ventilation, dust buildup, high ambient temperature. | Improve airflow, clean fans/heatsinks, reduce ambient temperature. |
7. Specifications
| Characteristic | Value |
|---|---|
| Model | Antminer S21 Pro 220T |
| Crypto Algorithm | SHA256 |
| Supported Coins | BTC/BCH/BSV |
| Typical Hashrate | 220 TH/s |
| Power on Wall @25°C | 3300 Watt |
| Power Efficiency @25°C | 15 J/TH |
| Input Voltage | 220~277 V |
| Input Frequency Range | 50~60 Hz |
| Maximum Input Current | 20 Amp |
| Network Connection | RJ45 Ethernet 10/100M |
| Dimensions (L*W*H, w/o package) | 450*219*293 mm (17.72 x 8.62 x 11.54 inches) |
| Net Weight | 18.5 kg (40.79 lbs) |
| Noise @30°C | 76 dBA |
| Operation Temperature | -20~45 °C |
| Storage Temperature | -20~70 °C |
| Operation Humidity (non-condensing) | 10%~90% RH |
| Operation Altitude | ≤2000 m |
8. Warranty Information
The BITMAIN Antminer S21 Pro 220T comes with a 365-day warranty from the date of purchase. This warranty covers manufacturing defects under normal use conditions.
Important Warranty Note:
- Damage caused by incorrect input voltage, improper installation, unauthorized modifications, or operation outside specified environmental conditions may void the warranty.
- Due to the special nature of mining equipment, returns not due to product failure may incur a return fee of 30% of the product price.
9. Support
For technical support, troubleshooting assistance, or warranty claims, please contact the manufacturer, BITMAIN, through their official website or designated support channels. Ensure you have your product model and purchase information ready when contacting support.
For general inquiries, you may also refer to the seller's support information if applicable.