The red coding is a visual indicator for technicians to quickly identify the specific temperature rating and switch logic

and voltage match

commonly used with A1494

provides critical real-time data for boiler and water heater maintenance

Resideo SV9510M2511 Valve 30067439-890 The red coding is aThe Resideo SV9510M2511 SmartValve is a critical gas control solution designed for Direct Hot Surface Ignition (DSI) systems in medium to high capacity residential and light commercial heating equipment. Operating on 24Vac, this SmartValve System Control combines gas flow regulation and electronic ignition sequencing into a single, compact body. Engineered for reliability in demanding environments, it features a standard opening profile with a 1 2" x