Trane SWT3335 Flow Switch

The Trane SWT3335 Flow Switch is a high-precision 24V Thermal Sensor Flow Switch designed for critical monitoring in industrial and commercial HVAC systems. Utilizing thermal dispersion technology, this OEM component detects fluid velocity and temperature shifts within the piping system to ensure optimal operational sequences. It is an essential safeguard for Trane AquaStream chillers, CenTraVac units, and Series R systems, providing a control signal to the HVAC control circuit when flow rates deviate from set thresholds. This proactive monitoring prevents equipment damage from low-flow or no-flow conditions that often lead to frozen evaporator bundles or compressor failure. Specifically engineered for rugged environments, the Trane SWT3335 features an IP67 rated enclosure for superior dust and water resistance and is rated for high-pressure applications up to 25 Bar. For contractors performing chiller maintenance or flow sensor replacement, this 24V AC/DC switch offers reliable, wear-free measurement without the mechanical failure points found in traditional paddle-style switches.

• OEM Compatibility: Exact replacement for Trane SWT03335 and X13790871040, ensuring seamless integration with existing chiller controls.
• Thermal Dispersion Sensing: Provides wear-free flow monitoring by detecting temperature differences in the media, eliminating the need for moving parts in the flow stream.
• High-Pressure Durability: Rated for up to 25 Bar, making it suitable for demanding commercial chilled water and process cooling lines.
• Environmental Protection: The IP67 housing protects internal electronics from moisture and ingress in mechanical room environments.
• Accurate Detection: Capable of measuring flow velocities up to 60 cm/s for precise system feedback and early diagnostic warnings.

• How do I verify if the sensor is functioning? Check for 24V AC/DC at the input. The switch provides a signal to the controller; if the chiller displays a "loss of flow" diagnostic while the pump is active, inspect the sensor probe for scale buildup or electrical failure.
• Does orientation matter during installation? Yes. To ensure accurate thermal sensor flow switch readings, the arrow on the housing must align with the direction of the fluid flow. Mount it in a straight pipe run (minimum 5 pipe diameters) away from elbows or valves to avoid turbulence.
• What fluid media is this switch compatible with? While the SWT3335 is standard for water-based systems, verify your specific media. For high-concentration glycol units, always cross-reference the part number to ensure thermal conductivity calibration matches the fluid.

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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.