Famous Fs254 Flow Switch Manual - 3 Secrets You Never Knew About. Mcdonnell & miller fs254 general purpose flow switch, 1 replaces fs8w. Application for a standard f261 flow switch, shut down the refrigeration compressor on a fluid chiller system if flow stops.
Place your order and we’ll. Position of the flow switch installing the flow switch in a horizontal run of pipe is recommended. However because of space limitations, the only available installation may be in a vertical.