Sealminer A2 Series Hydro Cooling: How to Install and Operate Safely

The Sealminer A2 Hydro miner from Bitdeer delivers high performance and energy efficiency with advanced liquid cooling—making it ideal for dense, large-scale mining deployments. This guide summarizes key steps for safe installation, configuration, and maintenance, with direct references to specific sections of the official manual.

Click here to download the Sealminer A2 Hydro Cooling User Manual (PDF)

1. Key Components and Interfaces

(See User Manual Section 1)

The Sealminer A2 Hydro follows a standard 2U form factor with:

• Ethernet port, status LEDs, IP report button, reset button
• Coolant inlet (blue) and outlet (red) ports
• Power interface and mounting handle

These designs make it easy to manage and scale operations within standard 19-inch water-cooled racks.

2. Environmental Requirements and Cooling System Specifications

(See User Manual Sections 2–3)

To ensure long-term safety and stable performance:

• Coolant inlet temperature:
• Normal mode: 20–55°C
• High Hash mode: 20–45°C
• Minimum flow rate: ≥10.2 L/min
• Max inlet pressure: ≤350 kPa
• Recommended coolant: distilled water + corrosion inhibitor + antifreeze

Additional system requirements:

• No copper allowed – use stainless steel piping only
• Main filter ≥100 mesh, with a 10μm side filter recommended
• Install a 3.5 bar pressure relief valve and constant pressure expansion tank

3. Installation and Rack Mounting Process

(See User Manual Section 4)

1. Slide the miner slowly into the rack track (two-person installation recommended)
2. Secure the front panel using mounting screws
3. Connect inlet and outlet pipes using factory-supplied quick connectors
4. Run coolant through the system before powering on

⚠️ Do not power on the machine until all air has been fully expelled from the system.

4. Proper Shutdown and Uninstallation

(See User Manual Section 4)

When removing or storing the miner:

1. Shut down and disconnect power
2. Remove Ethernet and power cables
3. Disconnect inlet first, then outlet
4. Unscrew the front panel and pull the unit out (two-person lift)
5. Use air pressure to fully drain coolant from the miner

If storage exceeds 2 hours or ambient temperature nears the coolant’s freezing point, complete drainage is required.

5. Pre-Startup Checks and Power Management

(See User Manual Section 5)

Before startup:

• Ensure coolant is circulating, no leaks, and air has been purged
• Only one miner should be filled and started at a time
• Check for condensation before startup, especially after rapid temperature changes

During startup:

• Turn on all cooling components (pumps, fans, valves) before powering servers
• Let the cooling system stabilize before running miners at full load

After shutdown:

• Drain coolant within 2 hours if miner is disconnected from the cooling system

6. Network Setup and Mining Configuration

(See User Manual Sections 7–8)

• Default IP mode is DHCP
• Use the Sealminer Tool to scan IP (hold “IP Report” for 5 seconds)
• Log in via browser using seal/seal
• Enter your mining pool URL and worker name
• Static IP setup is optional (Network > Settings)

Changes take effect immediately, no reboot required.

7. Monitoring and Batch Management

(See User Manual Sections 9–10)

From the user dashboard, you can view:

• Total and per-board hashrate
• Temperature readings and cooling status
• Pool connectivity

Use Sealminer Tool to batch manage firmware upgrades and config changes.

8. Component Disassembly and Replacement

(See User Manual Section 11)

Manual includes diagrams and step-by-step instructions for:

• Removing the control board (disconnect cables and screws)
• Removing hashboards (drain coolant, release pressure, remove copper bars and plates)
• Removing the power supply (similar process)

Follow exact procedures to avoid accidental damage.

9. Warranty Scope and Exclusion Reminders

(See User Manual Sections 12–13)

Warranty is void in cases including (but not limited to):

• Using non-compliant coolant or piping materials
• Missing expansion tank or relief valve, causing overpressure
• Incomplete system cleaning leading to blockages
• Improper connector insertion, resulting in leaks or overheating
• Failing to drain coolant post-shutdown
• Damage caused by condensation or unfiltered debris

Strict compliance with manual instructions is required for warranty coverage.

Download the Full User Manual (PDF)

For full technical details, diagrams, and safety procedures:
Click here to download the Sealminer A2 Hydro Cooling User Manual (PDF)