Trane CNT2239 Temperature Control 30067439-890 the RFS-4100-040 must be mounted

the RFS-4100-040 must be mounted with the diaphragm in a vertical plane to maintain its calibrated operating set point and prevent gravity-induced errors

Its robust internal construction ensures consistent performance under demanding duty cycles

Once the high-limit setpoint is reached and the circuit opens

ensuring a precise fit in specific furnace and coil configurations

Trane CNT2239 Temperature Control 30067439-890 the RFS-4100-040 must be mountedThe Trane CNT2239 Temperature Control is a rugged, manual reset mechanical thermostat designed for high performance HVACR applications. Engineered to monitor and regulate environmental conditions within a precise 30 to 100F temperature range, this control is the designated direct replacement for CNT2222 and serves as the official updated version of the A19ACA 17. For technicians in the field, this unit provides the reliable SPST (Single Pole Single