Johnson Controls P128AA-17 Lube Oil Pressure Control with 120 Second Time Delay

The Johnson Controls P128AA-17 is a dependable low-pressure lube oil cutout control designed for pressure-lubricated refrigeration compressors. This manual reset control features a built-in time delay relay that provides 120 seconds of motor run time, allowing oil pressure to build up before the compressor trips and preventing nuisance lockouts due to intermittent loss of oil pressure.

Key Features:

• Adjustable pressure range: 8 to 70 PSI for flexible application compatibility
• 120-second manual reset time delay for reliable compressor protection
• Trip-free time delay relay that cannot be manually overridden during fault conditions
• 1/4-inch external flare pressure connection compatible with refrigerant hose or cap tube
• 120/240 VAC dual voltage heater circuit for versatile installation
• Pressure-actuated contacts that open on increased pressure difference between oil and low-pressure connections

The P128AA series provides essential safety protection by monitoring the differential pressure between the oil pump discharge and compressor suction. If oil pressure falls below the safe operating threshold during the timing period, the control will trip and shut down the compressor to prevent damage. The manual reset feature ensures that technicians must investigate and correct the cause before restarting the system.