Description
The Johnson Controls P70KA-1 is a commercial-grade high pressure cutout control engineered to protect refrigeration and HVAC systems from dangerous high-side pressure conditions. When system pressure exceeds the setpoint, the control locks out and requires a manual reset before the system can restart — a critical safety feature that prevents nuisance cycling and forces technician verification before resuming operation.
Switching Configuration
- L-M1: Close High switching (contacts close on rising pressure)
- L-M2: Open High switching (contacts open on rising pressure)
- 4-wire, 2-circuit design for flexible wiring and dual-load control
Pressure Specifications
- Operating pressure range: 50 to 450 Psig
- Maximum bellows pressure: 525 Psig
Connection & Sensing
- 36″ capillary tube for remote pressure sensing
- 1/4″ flare nut fitting for easy field connection to system refrigerant lines
Safety & Reset
- Lockout function: requires manual reset after cutout event
- Prevents automatic restart — ensures technician inspection before system resumes
Typical Applications
- Commercial refrigeration compressor protection
- Air conditioning high-side pressure cutout
- Chiller and condensing unit safety circuits
- Industrial process cooling systems
The P70KA-1 is built to Johnson Controls’ exacting standards, delivering reliable pressure sensing and positive circuit interruption in demanding HVAC/R environments. The dual-circuit, 4-wire configuration allows simultaneous control of multiple loads or alarm circuits from a single sensing point.
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