Common Questions: What is the maximum pressure rating for the D24677

3 Million BTU/hr Rating: Provides high-volume pressure relief capacity suitable for large-capacity hydronic systems

this part is engineered for precision fitment within Reznor unit heaters and air handlers

The terminals are designed to accept standard industrial control wiring

The Hydrolevel 650-P is primarily intended for hot water boilers

Carrier 337662-704 Pressure Switch Assembly L99H008 Common Questions: What is theThe Carrier 337662 704 Pressure Switch Assembly is a critical OEM replacement component designed for high efficiency condensing furnaces. This assembly features a triple switch configuration calibrated to monitor inducer motor performance and vent system integrity across multiple stages of operation. To ensure precise combustion safety, the unit is factory set with specific pressure trip points: 0. 65" WC for low stage, 0. 90" WC for medium stage, and