The S2A-F add-on switch is for use only on our fire and smoke actuator models FSAF, FSNF, and new style FSLF with top holes. They are not intended for general damper applications because of mounting complexity and the availability of better options.
Option 1: Acquire a “–S” spring return actuator with integral switch (EF, AF and NF series "–S" switch is 2xSPDT; LF and TF series "–S" switch is 1xSPDT). If you have a new unused spring return actuator contact Belimo Customer service and request a Return Material Authorization (RMA) replacement “–S” model and return the original as instructed. NOTE: Restocking fee and incremental price increase may apply.
Option 2: Purchase a P475 series external switch kit. Mount the P475 onto a ½” damper shaft and P475-1 onto a 1” damper shaft. This 1xSPDT non-mercury switch uses a roller ball and mechanical action to provide open and closed damper position status.
For more information on the S2A-F click here.
For more information on the P475 click here; for the P475-1 click here.
Contact Customer Service or Technical Support for assistance or further information in USA 800‑543-9038, Canada 866-805-7089 or Brazil + 55 11 3643-5656.