Vintage Air's Trinary Switch Kit for beadlock crimp fittings combines low-pressure and high-pressure compressor clutch cutoff functions with an electric fan engagement signal at 254 PSI, protecting the A/C compressor while automatically triggering the cooling fan when the system needs it. It's recommended for all electric fan installations.
Vintage Air Installation Instructions (PDF)
California Proposition 65 Warning (PDF)
Specifications:
- Function: Low pressure compressor clutch cutoff
- Function: High pressure compressor clutch cutoff
- Function: Electric fan engagement signal
- Low pressure cutoff: 30 PSI
- High pressure cutoff: 406 PSI
- Fan engagement signal: 254 PSI
- Fitting type: Beadlock crimp
- Part Number: 24678-VUS
FAQ
What does the Vintage Air 24678-VUS trinary switch do?
It combines low and high pressure compressor clutch cutoff with an electric fan engagement signal in one switch.
At what pressure does the low-pressure cutoff activate?
30 PSI.
At what pressure does the high-pressure cutoff activate?
406 PSI.
At what pressure does it trigger the electric fan?
254 PSI.
What fitting type does this switch use?
Beadlock crimp fittings.

