Description
Trane CNT3480 Low Limit Temperature Switch Overview
The Trane CNT3480 is an OEM-grade low limit temperature switch designed to protect HVAC air handling systems from dangerously cold air conditions. Equipped with a 20-foot capillary sensing element, this switch monitors air temperature across a wide coil or duct cross-section, tripping the system before freeze damage can occur to coils, piping, or downstream equipment.
Key Features
- OEM Trane replacement part — engineered for precise fit and function
- 20-foot capillary tube for broad-area temperature sensing across large duct or coil faces
- Low limit protection shuts down the air handler or fan when air temperature drops below the setpoint
- Helps prevent freeze damage to heating coils, chilled water coils, and associated piping
- Designed for reliable, long-service-life operation in commercial and residential air handling applications
- Direct OEM replacement ensures compatibility with applicable Trane air handling units
Application
The CNT3480 low limit temperature switch is commonly installed in Trane air handling units (AHUs) and fan coil systems where freeze protection is critical. The long 20-foot capillary is routed across the face of the coil or through the duct to sample a representative average air temperature, triggering a safety shutdown if temperatures fall to a potentially damaging level.
Why Choose the Trane CNT3480?
- Genuine Trane OEM quality for dependable performance
- Protects costly HVAC equipment from freeze-related damage
- Extended capillary length ensures accurate, area-averaged temperature sensing
- Easy drop-in replacement for existing Trane low limit switch applications
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