How the 66B works (quick technical overview)
The 66B’s thermostatic gas control modulates heat to keep an opening in the ice. The combustion chamber sits under a boot in the tank, warming water locally; automatic safety controls (AGA-listed) help ensure safe operation while maintaining water access for livestock.
Installation: step-by-step highlights
Always follow the official manual and local code. The summary below highlights recurring best-practice points from Trojan resources.
- Unbox & identify parts (heater body, burner/control, hookup kit, brackets).
- Mount to tank using the adjustable brackets; keep the unit slightly leaning forward to shed condensation. petecosupply
- Gas hookup: Regulator typically within ~7 ft; connect flexible hose from regulator to heater fitting. Blow out lines to purge moisture before connecting.
- Protect the hose assembly and sensing bulb from livestock damage (routing and shielding).
- Lighting: Follow the burner lighting procedure (Trojan has video quick-guides).
- Verify operation: Confirm flame stability, thermostat response, and water opening growth over the first 24–48 hours.
Winter storage & maintenance: When not in use, turn off gas, remove the heater, and store the burner assembly dry—do not wrap the Unitrol in plastic. trojanlivestock.com
Common troubleshooting (fast fixes)
- Won’t stay lit → Check regulator placement, purge moisture, confirm adequate LP level, inspect thermocouple/sensing bulb routing and draft exposure.
- Insufficient open water → Evaluate wind exposure, boot position, thermostat setting, and fuel supply; confirm brackets and forward lean for condensation runoff.
- Aging controls → Post-2017 assemblies may use Unitrol 7000SLC; verify control style before ordering replacement.
Parts & upgrades frequently paired with the 66B
- Complete Burner Assembly (for rebuilds and older units)
- Robert Shaw / Robertshaw Unitrol 7000SLC (post-2017 gas control)
- Pilot assemblies, hoses, regulators, hookup kits (propane)
For a complete list of available replacement parts for your 66B, visit our parts list.
| Feature | Trojan 66B (Kit #15000) | Electric Stock Tank De-icer |
|---|---|---|
| Power Source | LP or Natural Gas (no electricity required) | 120V or 240V AC electricity |
| Energy Independence | Fully off-grid, ideal for remote locations | Requires nearby electrical service |
| Operating Cost | Low propane or natural gas usage | Dependent on electricity rates |
| Heating Capacity | ~12,400 BTU/hr; opens ~3–5 ft radius | Typically 250–1500 watts; localized heating |
| Climate Suitability | Mild to extreme winter conditions to -30 degrees F. | Mild to moderate winter use |
| Maintenance | Annual check of burner, control, and hoses | Inspect cord and element for corrosion |
| Installation | Mounts to tank; connect LP/NG line, adjust brackets | Submersible; drop-in plug-and-play setup |
| Ideal For | Livestock tanks in remote pastures with no power | Barns or near-grid installations |