Fog Hashing C2 Setup Guide

Guides & How-To Product Guides
1

Setup Guide for the Fog Hashing C2 Immersion-Tank Boiler / Air Heating hybrid unit:

Please familiarize yourself with the manufacturer’s documentation before proceeding!

Watch a video tutorial of the C2 kit from the Fog Hashing team here:

Fog Hashing C2 Immersion Container + Dry Cooler

System Capacity: Accommodates 2 Bitcoin mining rigs (e.g., Antminer S19/S21 series) Kit Contents:

  • 1 × Immersion tank (C2)

  • 1 × Dry cooler

  • 5 m dielectric oil tubing (2 × hoses)

  • Gaskets (4 ×)

  • Electric oil-filling pump + 24 V DC adapter

  • Miner lift handles (2 ×)

  • Fan simulators (Antminer-compatible, 2 ×)

  • Printed user manual

Prerequisites (Customer-Supplied)

Item Qty Notes
C13–C14 power cord 2 1 × tank, 1 × dry cooler; 200–240 V, 50/60 Hz
Miner power cords As needed C19 or PDU tails
PDU (optional) 1 Recommended for clean power distribution
Ethernet cables 2 Cat5e or better
Dielectric fluid ~60 L Fog Hashing/F3 approved single-phase fluid¹

Component Familiarization

Immersion Tank (C2)

  1. OLED display & control button – system status, pump start/stop

  2. C14 power inlet – 200–240 V

  3. Coolant inlet (bottom) – marked “IN”

  4. Coolant outlet (top) – marked “OUT”

  5. Cable passthrough grommets – power + Ethernet

  6. Overflow trough – fill reference mark

  7. Drain port – 4 screws, bottom plate

Dry Cooler

  1. Coolant inlet (higher port) – from tank outlet

  2. Coolant outlet (lower port) – to tank inlet

  3. C14 power inlet – 200–240 V

  4. EC fan array – variable speed

  5. Exhaust vent – rear

  6. Control box (behind 4 screws) – mode toggle switch

Installation Location Guidelines

  1. Permanent placement – once filled, relocation is messy and risks spillage.

  2. Outdoor dry-cooler option – shade mandatory; avoid direct sun.

  3. Airflow clearance – ≥ 0.6 m (2 ft) behind dry cooler.

  4. Max tubing length – 5 m standard; contact Exergy for extensions.

  5. Max elevation difference – ≤ 3 m (10 ft) between tank and dry cooler.

Step-by-Step Setup

1. Unboxing & Inspection

2. Verify Kit Contents (see table above).

3. Hydraulic Connections

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  1. Insert gaskets into hose quick-connect ends.

  2. Connect hoses without cross-flow:

    • Tank OUT (top) → Dry-cooler IN (higher)

    • Tank IN (bottom) → Dry-cooler OUT (lower)

  3. Hand-tighten; do not overtighten.

4. Miner Preparation

  1. Attach lift handles to front bezel of each miner (4 screws each).

  2. Insert fan simulators into miner fan headers (prevents error 0x02).

5. Load Miners

  1. Lower rigs vertically using handles; ensure PSU faces cable passthrough.

  2. Route power + Ethernet through grommets; seal lightly.

6. Electrical

  1. Plug C13 cords into tank and dry cooler C14 inlets.

  2. Connect to 200–240 V circuit (≤ 15 A per leg recommended).

7. Initial Coolant Fill

  1. Place oil pump discharge into overflow trough.

  2. Fill until fluid reaches overflow groove (≈ 45 L).

  3. Draining note: remove 4 bottom-plate screws; reverse pump hose into drain port to extract residual fluid from internal piping.

8. System Power-On & Circulation Prime

  1. Press OLED button → enters self-check (≈ 30 s).

  2. Internal pump circulates; level drops ~10–15 L.

  3. Top-up to overflow groove again; repeat until level stabilizes (± 1 cm).

  4. If pump cavitates: open red exhaust valve on pump until steady flow, then close.

9. Miner Networking & Hashing

  1. Connect miner power cords to PDU.

  2. Connect Ethernet; scan 192.168.x.x subnet (Angry IP Scanner, etc.).

  3. Configure pool URL/worker in miner UI (default login: root/root).

  4. Long-press OLED button → cuts miner power (emergency stop).

10. Dry-Cooler Mode Selection

Mode Activation Temp Max-Speed Temp Toggle Position
Normal (cooling) 20.5 °C 28.9 °C Switch UP
Heating (hashrate heat) 41.3 °C 49.7 °C Switch DOWN

For Dry Coolers Manufactured after June 2024 - AC/FC Control

The updated Fog Hashing dry cooler for the C2 immersion tank features AC/FC fan modes, providing precise control over cooling and heating performance.

Note: All dry coolers manufactured after June 2024 include enhanced AC/FC fan control as standard.

AC Mode (Automatic Temperature Control)

AC mode automatically adjusts fan speed based on a target oil outlet temperature (the fluid returning to the immersion tank).

Activation & Configuration

  1. Press the dial inward (like a button) until AC flashes on the display.

  2. Rotate the dial to set your desired target temperature.

    • Default: 45°C

    • Recommended for balanced miner cooling and heating efficiency.

Operation

  • The system dynamically increases or decreases fan speed to maintain the set outlet temperature.

  • The display cycles between:

    • HI: Inlet oil temperature (entering the dry cooler)

    • LO: Outlet oil temperature (returning to the tank)

FC Mode (Fixed Fan Speed Control)

FC mode runs the fans at a constant speed, regardless of fluid temperature.

Activation & Configuration

  1. Press the dial → rotate to FC → press again to confirm.

  2. Rotate the dial to select fan speed:

    • 1 = Lowest speed

    • 99 = Highest speed

    • 0 = Fans stopped

  3. Press the dial to confirm your selection.

Operation

  • Fan speed remains fixed at the selected value.

  • The display continues to cycle:

    • HI: Inlet oil temperature

    • LO: Outlet oil temperature

Quick Reference Summary

Mode Control Type Adjustment Method Display Behavior
AC Automatic (temp-based) Set target outlet temp via dial Cycles HI (inlet) → LO (outlet)
FC Manual (speed-based) Set fixed speed (0–99) Cycles HI (inlet) → LO (outlet)

Tip: Use AC mode for energy-efficient, temperature-stable operation. Use FC mode for testing, diagnostics, or specific airflow requirements.

For additional support, contact us at: support@exergyheat.com