Description
The Lennox 10M51 is a manual reset (M/R), single pole double throw (SPDT) high pressure switch engineered to protect refrigeration and air conditioning systems from potentially damaging high-pressure conditions. With a 450 PSI cut-out (CO) set point, this switch interrupts the circuit when system pressure exceeds the rated threshold, preventing compressor damage and system failures.
Key Features
- Manual reset (M/R) operation — requires deliberate technician reset after a high-pressure trip, preventing automatic restart into unsafe conditions
- Single Pole Double Throw (SPDT) switching action for versatile circuit control and monitoring
- 450 PSI cut-out (CO) set point for reliable high-pressure protection
- OEM Lennox replacement part — engineered to factory specifications for direct compatibility
- Designed for use in residential and light commercial HVAC and refrigeration applications
Why Manual Reset Matters
Unlike automatic reset pressure switches, the manual reset design of the Lennox 10M51 ensures that a qualified technician must diagnose and clear the root cause of the high-pressure condition before the system is allowed to restart. This added layer of safety helps protect compressors, refrigerant circuits, and connected equipment from repeated exposure to over-pressure events.
Application
- Lennox OEM replacement high pressure switch
- Compatible with select Lennox air conditioning and heat pump systems
- Suitable for refrigeration and HVAC high-side pressure protection circuits
Specifications
- SKU: 10M51
- Brand: Lennox
- Switch Type: High Pressure
- Reset Type: Manual Reset (M/R)
- Switching Action: SPDT (Single Pole Double Throw)
- Cut-Out Pressure: 450 PSI CO
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