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Technicians should verify the Carrier 321979-401 part number against the unit’s specific bill of materials or the data plate for the correct serial range
this mechanical expansion device ensures precise metering to the evaporator
which minimize arcing and extend the service life of electrical connections
This unit is designed for 208-230V single-phase electrical systems typically found in commercial and residential heat pump or AC applications
making it suitable for high-pressure water and air systems where standard valves fail
Belimo S2A-F Auxiliary Switch 340155-7026 Technicians should verify the CarrierThe Belimo S2A F Auxiliary Switch is a high performance, field addable accessory designed for Belimo LF and TF series actuators. Engineered for precision feedback and auxiliary circuit control, this unit features two independent Single Pole Double Throw (SPDT) switches, providing reliable signaling for end stop positioning or interlocking with external equipment like fans or dampers. Rated for 3A at 250 VAC, the S2A F switch offers an adjustable
