Antminer S21 Hydro: Master Your Investment
Essential Operating Guide for Peak Performance & ROI
Antminer S21 Hydro Operating Manual
The Bitmain Antminer S21 XP Hydro represents a significant leap in mining efficiency, harnessing the power of hydro-cooling to achieve unparalleled hashrates and reduced energy consumption.
To fully capitalize on this advanced technology and ensure a sustained return on investment, meticulous adherence to proper operating procedures is paramount.
This comprehensive guide provides technicians with the essential knowledge for seamless deployment, optimal performance, and long-term stability of the S21 XP Hydro within hydro-cooled mining environments.
1. Hardware Overview
Model: Antminer S21 XP Hydro (473Th/s)
Manufacturer: Bitmain
Algorithm: SHA-256 (supports BTC, BCH, BSV)
Key Specifications:
| Feature | Specification |
|---|---|
| Hashrate | 473 TH/s |
| Power Consumption | 5,676W @ 35°C |
| Efficiency | 12 J/TH |
| Cooling System | Hydro-cooling (closed-loop) |
| Noise Level | 50 dB |
| Dimensions (L×W×H) | 410 × 170 × 209 mm |
| Weight | 12.3 kg (net) / 13.6 kg (gross) |
| Input Voltage | 380–415V AC (3-phase) |
| Network Interface | RJ45 Ethernet (10/100M) |
2. Startup Procedures
Pre-Installation Checklist
1. Power Requirements:
- Ensure a 3-phase power supply (380–415V) with a 30A circuit.
- Use a certified PDU (Power Distribution Unit) and C20 power cable.
2. Cooling System Setup:
- Connect hydro-cooling lines to DN10 (OD10 mm) connectors.
- Use deionized/pure water or antifreeze (pH 8.5–9.5).
- Verify coolant flow rate: 8.0–10.0 L/min at ≤3.5 bar pressure.
- Ensure inlet coolant temperature: 20–50°C.
3. Environment:
- Operating temperature: 20–50°C.
- Humidity: 10–90% (non-condensing).
- Ventilation: Ensure adequate airflow around the unit.
3. Installation and Configuration
Step 1: Physical Setup
- Mount the miner in a dust-free, vibration-resistant location.
- Connect hydro-cooling lines and power cables securely.
Step 2: Network Configuration
- Connect the Ethernet cable to the RJ45 port.
- Access the miner’s IP via Bitmain’s Antminer Configuration Tool or router interface.
Step 3: Mining Pool Setup
- Log in to the miner’s web interface (default IP: 192.168.1.1).
- Navigate to Miner Configuration > Pool Settings.
- Add pool details (example for ViaBTC):
- URL: stratum+tcp://btc.viabtc.com:25
- Worker: your_username.worker_name
- Password: x
4. Operating Guidelines
Daily Monitoring
- Dashboard Metrics: Track real-time hashrate, temperature, and power usage via the web interface.
- Coolant Health: Check for leaks, flow rate stability, and pH levels weekly.
Maintenance Schedule:
| Task | Frequency | Action |
|---|---|---|
| Coolant Replacement | Annually | Flush system, refill with fresh coolant |
| Filter Cleaning | Monthly | Clean inlet/outlet filters |
| Firmware Updates | Quarterly | Download updates from Bitmain’s site |
| Fan Inspection | Quarterly | Test fan speed, replace if noisy |
5. Safety and Compliance
Electrical Safety:
- Always ground the unit (resistance ≤0.3Ω).
- Use fire extinguishers rated for electrical fires nearby.
Coolant Handling:
- Wear gloves when handling antifreeze.
- Dispose of coolant per local environmental regulations.
Noise Control:
- Deploy in sound-dampened enclosures if noise exceeds 65 dB.
6. Troubleshooting
| Issue | Solution |
|---|---|
| Low Hashrate | Check coolant flow, firmware updates, or pool connectivity |
| Overheating | Verify coolant temperature ≤50°C and clean filters |
| Connection Errors | Reboot miner, test Ethernet cable, confirm pool URL |
7. Environmental Requirements
1. Coolant Parameters
- Inlet coolant temperature: 20°C to 50°C. Note: The miner cannot start if the inlet temperature is below 20°C
- Coolant flow rate: 8.0–10.0 liters per minute (L/min)
- Coolant pressure: ≤3.5 bar
- Coolant type: Antifreeze, deionized water, or pure water
- Coolant pH: 8.5–9.5
- Coolant conductivity:
- Must be less than 100 μS/cm.
- When first running, it should be less than 20 μS/cm; replace fluid if above 100 μS/cm
2. Ambient & Operating Environment
- Operating temperature: 0°C to 40°C (recommended), but can tolerate -20°C to 70°C for storage
- Maximum ambient temperature:
- 30°C if outlet coolant is 35°C
- 40°C if outlet coolant is 45°C
- 45°C if coolant is 50°C1.
- Humidity: 10% to 90% RH (non-condensing)
- Storage temperature: -20°C to 70°C
3. Physical & Installation Requirements
- Water pipe connector: DN10 (10 mm diameter)
- Power supply: 380–415V AC, 3-phase, 50–60Hz
- Network: RJ45 Ethernet (10/100M)
Summary Table
| Parameter | Requirement |
|---|---|
| Inlet coolant temp. | 20°C to 50°C |
| Coolant flow rate | 8.0–10.0 L/min |
| Coolant pressure | ≤3.5 bar |
| Coolant type | Antifreeze, deionized/pure water |
| Coolant pH | 8.5–9.5 |
| Coolant conductivity | <100 μS/cm (start: <20 μS/cm) |
| Operating temp. | 0°C to 40°C (storage: -20°C to 70°C) |
| Ambient humidity | 10% to 90% RH (non-condensing) |
| Water pipe connector | DN10 (10 mm) |
| Power supply | 380–415V AC, 3-phase, 50–60Hz |
Proper adherence to these environmental requirements is essential for safe, efficient, and reliable operation of the Antminer S21 XP Hydro.
Failure to meet these parameters can result in hardware malfunctions, reduced efficiency, or voided warranty.
8. Warranty and Support
Warranty:
365 days (void if used outside AntSpace HK3 systems).
Support:
Contact Bitmain Support or authorized resellers for repairs.
Final Notes:
- Always power off the unit before maintenance.
- For overclocking, gradually increase frequency while monitoring temperature and efficiency.
Consistent, high-yield operation of the Antminer S21 XP Hydro hinges on a deep understanding of its technical specifications and adherence to best practices.
While this manual equips you with the fundamental knowledge, the complexities of large-scale hydro mining deployments often necessitate specialized expertise to maximize uptime and profitability.
Why risk suboptimal performance or costly downtime due to operational oversights?
Our seasoned team offers comprehensive support, from initial setup and system integration to ongoing maintenance and performance optimization, ensuring your hydro mining investment delivers its full potential.
Partner with us to unlock peak efficiency and secure a rapid return on your S21 XP Hydro deployment.