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this is an electro-mechanical relay
The Carrier EA12SC450 TXV Valve is a critical metering device designed for precision refrigerant flow control in residential and light commercial HVAC systems
but it requires a standard 24VAC power supply to operate the logic board and outputs
ensuring accurate valve response
Resideo ZD6X20TZ Damper 320788-704 this is an electro-mechanical relayThe Resideo ZD6X20TZ is a 6 inch by 20 inch rectangular zone damper engineered for precision airflow control in residential and light commercial forced air systems. As a parallel blade zone damper, it utilizes a 24Vac synchronous motor rated at 6VA, providing a high torque 71 inch ounce output for reliable blade positioning. This specific model follows a power closed spring return open logic, functioning as a normally open damper. In the event of a