K1494-2 - Lincoln Electric SF2400 Fan Manual Starter Switch 115V

Technical Retrofit for Prism 2400 Fan Units

The Lincoln Electric K1494-2 is a specialized Starter Overload Switch designed for the SF2400 Fan, commonly found in the Prism 2400 centralized fume extraction systems. This component is critical for specific configuration scenarios where the standard Arc Sensor or Lamp Kit (which typically automates the fan start/stop based on welding current or light) is not utilized. In the absence of these automatic triggers, the extraction unit requires a dedicated method to manage power input and motor protection. The K1494-2 provides this functionality, enabling a hard-wired, manual On/Off control interface for the 115V version of the fan.

Technically, this device serves two primary functions: motor control and thermal overload protection. When retrofitting a Prism 2400 unit for 115V single-phase operation without the low-voltage control loop provided by the sensor kits, the K1494-2 ensures that the high-voltage circuit is managed safely. It protects the fan's windings from excessive current draw that could occur during locked-rotor conditions or voltage sags, which is essential for the longevity of the 1 HP motor used in the SF2400 assembly. The switch is rated specifically for the amperage draw of the SF2400 at 115V, ensuring precise trip characteristics that generic switches cannot guarantee.

Installation of the K1494-2 is intended for qualified maintenance personnel or electricians. It replaces or supplements the standard control logic board connections, effectively bypassing the need for the sensor inputs. This makes it an ideal solution for custom fabrication cells, robotics enclosures where external PLC control might be used in conjunction with manual overrides, or simple manual welding stations. By using this genuine Lincoln Electric part, you ensure compliance with the equipment's electrical schematics and maintain the integrity of the system's warranty and safety ratings.