Weil McLain 389-900-221 Control Panel R-22 Accurate calibration of the L195-40F

Accurate calibration of the L195-40F temperature differential is vital for preventing heat exchanger damage and ensuring consistent airflow monitoring

Does the 1-2 PSI spring require a specific mounting position

water pooling in the burner compartment

Standard IC extraction tools and anti-static procedures are required to prevent damage to the chip during control board integration

Advanced Diagnostics: Features a high-visibility LED that flashes specific fault codes

Weil McLain 389-900-221 Control Panel R-22 Accurate calibration of the L195-40FThe Weil McLain 389 900 221 BCP 8W is a high performance multiple boiler control panel engineered for hydronic applications requiring precision staging. For technicians managing multi unit configurations, this hydronic heating controller manages up to 8 stages out of the box, with the ability to expand to 24 stages using extension modules. By incorporating outdoor reset control, the BCP 8W automatically adjusts the system set point based on ambient