The Kromschröder BCU 370 is a burner control for modulating forced-draught gas burners with direct ignition or pilot ignition. The type code defines flame supervision, ignition equipment, valve proving and communication options.
Flame Supervision
- U0: continuous operation with ionization sensing, or intermittent operation with a UVS detector.
- U1: continuous operation with a UVC 1 detector.
Configuration Options
- Q: 120 V AC; W: 230 V AC, both 50/60 Hz.
- D3: valve-proving option.
- B1: PROFIBUS DP communication option.
- External ignition transformer or integrated ignition options I1, I2 and I3.
Installation
The enclosure is rated IP54. The ambient range is −20 to +60 °C, or −10 to +60 °C for versions with integrated ignition.

