Featured Heater
3-in-1 Herman Nelson Recirculating Heater
588,000 BTU/h
RUN TIME: 19 Hours at 100% Load
Manuals & Technical Documentation
Looking for troubleshooting help? Start with the Interactive Guide above. For full manuals, download your model below.


Best viewed using Adobe Acrobat Reader. Some browser PDF viewers may limit functionality.
🔧 Interactive Troubleshooting Guide – BT400 NEX-D (Diesel)
Having an issue in the field? Our interactive PDF guide helps you diagnose common BT400 NEX-D problems step-by-step — fast.
What You’ll Find Inside
- Clickable troubleshooting paths
- Faster fault identification
- Designed for technicians & operators
- Works offline once downloaded
Opens a guide overview page with download instructions.