Description
The Trane CNT3159 is a Single Pole Normally Open (SPNO) high-pressure switch engineered as an OEM replacement for Trane HVAC systems. Designed to monitor and protect refrigerant circuit integrity, this switch automatically opens the circuit when system pressure reaches the upper threshold and resets upon pressure drop — safeguarding compressors and system components from damaging over-pressure conditions.
How It Works
As a normally open (NO) switch, the CNT3159 closes the electrical circuit under normal operating pressure and opens — interrupting the control circuit — when refrigerant pressure rises to the trip point. This action triggers a protective shutdown, preventing compressor damage and system failures caused by high-side pressure excursions.
Key Specifications
- Part Number: CNT3159
- Switch Type: Single Pole Normally Open (SPNO)
- Switch Function: High Pressure (Hi #)
- Opening Pressure: 400 PSI
- Closing Pressure: 250 PSI
- OEM Trane Replacement Part
Features & Benefits
- OEM Trane part ensures proper fit and function in compatible Trane equipment
- SPNO design provides reliable circuit interruption at the set trip pressure
- High opening pressure setpoint (400 PSI) suited for high-pressure refrigerant systems
- 250 PSI closing/reset pressure provides a safe differential before re-engagement
- Protects compressors and refrigerant circuits from over-pressure damage
- Direct OEM replacement minimizes downtime and simplifies installation
Application
The CNT3159 is intended for use in Trane commercial and residential HVAC systems where high-pressure refrigerant circuit protection is required. Always verify compatibility with your specific Trane equipment model before installation.
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