Always verify the pressure vessel number on the valve nameplate before installation to ensure exact internal fitment

easy-to-read scale plate for accurate field setpoints

This valve supports multi-positional mounting

This support is designed for use in both natural gas and propane configurations within compatible Carrier HVAC equipment

This Negative Temperature Coefficient (NTC) sensor is the general lower thermistor

Resideo VU843A1004 Actuator R-407A Always verify the pressure vesselThe Resideo VU843A1004 is a professional grade fan coil actuator engineered for reliable service in high rise residential and commercial hydronic systems. Operating on a 24Vac power supply, this two position replacement actuator utilizes a 2 wire SPST control signal to manage flow through normally closed VU53 series valve bodies. The unit features a robust spring return mechanism, ensuring a fail safe close in the event of power loss. With a precise