White-Rodgers 1311-104 Valve

The White-Rodgers 1311-104 is a professional-grade 3-wire hydronic zone valve engineered for precision flow control in residential and commercial heating systems. Designed for 1-1/4" I.D. tubing, this motor-actuated valve manages distribution to specific zones, ensuring efficient thermal management. Operating on 24 VAC at 60Hz, the 1311-104 includes a built-in auxiliary switch (end switch) to signal the boiler or circulator pump once the valve reaches the fully open position. This model supports a maximum water temperature of 240F and a maximum system pressure of 50 PSI. Built for durability in high-demand environments, it maintains a 15 PSI maximum differential across the valve. This unit serves as a direct replacement for the F94-0779 and is compatible with standard 3-wire thermostat configurations, providing a reliable solution for hot water heating systems requiring high-capacity flow and consistent seat sealing under pressure.

Key Benefits for Technicians:

• High-Temperature Rating: Engineered to withstand hydronic heating environments up to 240F.
• Integrated Auxiliary Switch: Simplifies wiring by providing a dry contact to initiate the burner or pump circuit.
• Optimized Flow Rate: The 1-1/4" porting ensures minimal pressure drop in high-volume zone valve replacement applications.
• Heavy-Duty Construction: Designed to handle a 50 PSI maximum system pressure without compromising seal integrity.
• Direct Compatibility: Exact replacement for White-Rodgers 1311-104 and legacy F94-0779 models, reducing field modification time.

Common Installation & Support Questions:

How do you wire a 3-wire zone valve to a 2-wire thermostat?
When installing the White-Rodgers 1311-104, the 3-wire configuration typically requires a common lead, a hot lead from the thermostat, and an end switch circuit. If using a 2-wire thermostat, an isolation relay may be required to properly manage the 24V zone valve wiring and prevent feedback to the transformer.

What causes a hydronic zone valve to fail to open?
Common failure points include a burnt-out motor actuator or scale buildup on the valve seat. For the 1311-104 valve, ensure the 24VAC supply is consistent and check the auxiliary switch continuity to confirm the motor is completing its travel.

Can this valve be mounted in any orientation?
For optimal performance and to prevent air trapping or moisture damage to the motor, it is recommended to mount the White-Rodgers 1-1/4 zone valve in a vertical or horizontal pipe run with the actuator head positioned above the piping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.