and GC-146 series fans

Featuring an adjustable temperature dial and pilot light indicator

allowing you to match the VFD performance to the specific CFM requirements of the air handler or condenser fan

Key Benefits: Versatile Mounting: Includes hardware for both return duct and living space wall installations

McDonnell & Miller FS7-4WJ Switch 322057-301 and GC-146 series fansThe McDonnell & Miller FS7 4WJ Flow Switch (Part Number 120261) is an industrial grade liquid flow switch engineered for high pressure applications where environmental protection is paramount. This unit features a 1 1 4" BSPT connection and is housed in a rugged NEMA 4X enclosure, providing superior resistance against corrosion, moisture, and debris in mechanical rooms or processing plants. Rated for a maximum pressure of 300 PSI (21 kg cm), the FS7