Johnson Controls Lube Oil Pressure Cutout Control with Second Time Delay

The Johnson Controls P28 Series lube oil pressure cutout control (also called an oil failure control or oil pressure safety switch) gives dependable, economical oil pressure protection for pressure-lubricated refrigeration compressors. It has a built-in time delay relay. The control shuts the compressor down if net oil pressure falls below the setpoint for longer than the delay period.

Key Features:

• Measures net oil pressure, which is the difference between oil gauge pressure and crankcase refrigerant pressure
• Built-in time delay relay with ambient temperature compensation. It allows pressure to build at startup and avoids nuisance shutdowns from brief pressure drops while running
• Trip-free manual reset that cannot be overridden by holding the reset button down
• Adjustable setpoint with direct-reading scale indication
• Dust-protected, enclosed Pennswitch switch unit
• Replaceable time delay relay assembly for field service
• Models are available with runlight and alarm terminals for remote monitoring of oil pressure status

The P28 Series is offered in several time delay, connection and reset configurations to suit different compressor and refrigerant applications. It is a proven choice for compressor protection in commercial and industrial refrigeration systems.