Resideo 123773A/U replacement sail for S688A sail switch 4 volts

Product Description

The Resideo 123773A/U Replacement Sail is a critical sensing element for the S688A Sail Switch, providing reliable airflow detection. This replacement sail assembly actuates the switch when duct velocity reaches the required threshold, ensuring auxiliary equipment operates only during active blower cycles. Designed for light commercial and residential HVAC systems, it withstands static pressure fluctuations and prevents equipment operation during low-flow conditions. This component operates at 4 Volts.

• Engineered for direct compatibility with S688A series sail switches.
• Compatible with both horizontal and vertical duct orientations for flexible application.
• Designed for low-velocity sensitivity, catching light air currents for reliable equipment interlock.

Product Highlights

Ensures proper airflow detection and equipment interlock in HVAC systems, protecting components during low-flow conditions.

Product Information

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: 123773A/U