Honeywell SM20020 PCB (control board)

Honeywell board SM20020 Original control board for Alfa Calor boilers and other gas equipment. Honeywell board SM20020 is a specialized electronic module designed for controlling gas boilers. This device is also known under part number 534.568.020 in warehouse accounting systems, and in Honeywell technical documentation it may be referred to as Kit - Spare part - PCB assembly (spare parts kit - printed circuit board assembly). Purpose and compatibility: The SM20020 control board was developed by Honeywell engineers to provide a full control cycle for gas equipment. Installing this module allows: Automating boiler startup: The board initiates the complete startup sequence in compliance with all set time intervals. Processing sensor readings: The module continuously reads information from temperature sensors, draft sensors, and pressure sensors, adjusting operating modes. Ensuring safe operation: The system automatically locks the boiler in the absence of airflow or flame extinction during the safe period. Compatibility and installation: The Honeywell SM20020 board is installed in Alfa Calor gas boilers. The module is a standard printed circuit board with an integrated transformer protected by an EMC filter. Characteristic Value Manufacturer Honeywell Part number (SKU) SM20020 Device type Control board Compatibility Alfa Calor boilers Purpose Control of startup sequence, sensor signal processing, safety systems Category Electronic boards Important note: The manufacturer reserves the right to make changes to the design of the Honeywell SM20020 control board without prior notice, which may affect appearance and packaging but does not affect