Carrier ZONEBB3ZAC01 Control 320074-702 the PWLX03S provides maximum versatility

the PWLX03S provides maximum versatility for pump differential pressure monitoring and cooling water system balancing

The SPST contact function (specifically NO+NC) is built to handle high electrical loads with minimal bounce time

making it a preferred choice for HVAC burner manifold setups and large-scale boiler applications

this thermostat provides both integral temperature sensing and manual setpoint adjustment within a 60-85°F range

This specific model is designed for a horizontal orientation with the warmer-cooler text aligned for side-to-side operation

Carrier ZONEBB3ZAC01 Control 320074-702 the PWLX03S provides maximum versatilityThe Carrier ZONEBB3ZAC01 3 Zone Control System is a professional grade solution designed for precise climate management in residential or light commercial applications. Engineered for multi zone HVAC control, this board supports up to 3 zone 2H 2C systems, offering seamless integration with standard 24V heat pumps, air conditioners, and furnace configurations. This backplate mounted controller utilizes duct temperature sensors to manage air balancing