Description
Product Overview
The Tjernlund AS2SW3 3‑Speed Switch is engineered to provide dependable speed selection for AS2 transfer fans used in a variety of industrial ventilation systems. Constructed from high‑grade polymer components, the switch offers a smooth tactile feel while resisting wear from frequent operation. The white finish not only matches many equipment housings but also adds a level of visibility for quick identification during maintenance. Package dimensions of 4.6 x 4.5 x 4.1 inches and a lightweight of 5.6 ounces make it easy to handle and install. The included hardware—switch plate, ergonomic knob, and wire nuts—ensures a complete solution right out of the box, reducing the need for additional parts.
![[Product front view showing all components]](https://www.buildgoods.store/wp-content/uploads/2026/07/8e16160d572e4e0f8f91009d7d89ec5b.jpg)
Usage
This switch is ideal for environments where precise airflow control is essential, such as manufacturing plants, warehouses, and large‑scale HVAC installations. Operators can quickly adjust fan speed to low, medium, or high settings, allowing for energy‑efficient operation during off‑peak hours or maximum ventilation when required. The design accommodates standard wiring practices, making it suitable for retrofits as well as new installations. Because the switch is rated for current applications common to industrial fans, it can be trusted in harsh conditions, including exposure to dust, temperature fluctuations, and occasional vibration.
Why Choose Us
Choosing the Tjernlund AS2SW3 means selecting a product backed by a legacy of American manufacturing excellence. Each unit undergoes rigorous quality inspections to meet the expectations of industrial users who cannot afford downtime. The switch’s durable polymer housing resists cracking and corrosion, extending service life beyond typical competitors. Additionally, Tjernlund provides responsive technical support and a clear warranty policy, giving customers confidence that any issues will be addressed promptly. The combination of reliable performance, ease of installation, and comprehensive after‑sales service makes this switch a prudent investment for any facility seeking long‑term operational stability.
Key Features
- Three‑position speed control lets you select low, medium, or high fan output effortlessly.
- White switch plate and knob provide a clean, professional appearance that blends with most equipment enclosures.
- Included wire nuts simplify wiring, reducing installation time and the need for extra accessories.
- Robust polymer construction resists wear, corrosion, and temperature extremes for long‑lasting reliability.
- Dedicated customer support and warranty coverage ensure peace of mind after purchase.
FAQ
What fan models are compatible with the AS2SW3 switch?
The AS2SW3 is specifically designed for Tjernlund AS2 series transfer fans, but it can also work with other fans that use a standard three‑speed control interface, provided the voltage and current ratings match.
Is the switch rated for outdoor installation?
While the switch is built to withstand harsh indoor industrial environments, it is not rated for direct exposure to rain or extreme outdoor conditions. For outdoor use, a protective enclosure is recommended.
Can the switch be mounted on a panel with other controls?
Yes, the compact dimensions allow the AS2SW3 to be installed alongside other switches and indicators on a standard industrial control panel, making it easy to integrate into existing layouts.
What is the warranty period for this product?
Tjernlund offers a one‑year limited warranty covering manufacturing defects, ensuring that any material or workmanship issues are addressed without additional cost.
How do I replace a faulty switch?
To replace the switch, disconnect power, remove the mounting screws, detach the wiring using the supplied wire nuts, and install the new unit following the same wiring configuration. Detailed instructions are included in the product manual.




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