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The Lennox Y8736 TXV Kit is a field-installed 3-ton thermal expansion valve specifically engineered for high-efficiency R410A air conditioning and heat pump systems
preventing electrical leakage even under high-temperature cycling
operating on 230V single-phase power
Automatic Reset: Eliminates the need for manual intervention once temperatures return to the 135°F safety range
maintaining stable superheat levels and protecting the compressor from liquid slugging
Siemens Building Technology 540-670B Sensor 323613-751 The Lennox Y8736 TXV KitThe Siemens 540 670B is a TEC Room Sensor designed for integration with Siemens Building Technologies terminal equipment controllers. This unit provides precision room temperature sensing and features a local setpoint adjustment slider and a manual override button for temporary occupancy requests. Built for durability in commercial environments, the 540 670B utilizes a 10K Ohm Type II thermistor to ensure accurate HVAC automation feedback and stable