Johnson Controls P70KA-7 Pressure Control R-410A the AL-170 is used to

the AL-170 is used to direct supply air to actuators or other pneumatic devices when the coil is energized

they typically step down the voltage to 120V at the ignitor terminals

How often should I rebuild my ASCO solenoid valves

High-Durability Construction: Engineered to withstand the high-cycle thermal stress of modern heat exchangers

Johnson Controls P70KA-7 Pressure Control R-410A the AL-170 is used toThe Johnson Controls P70KA 7 Pressure Control is a heavy duty single pole, double throw (SPDT) switch engineered specifically for high pressure applications in industrial refrigeration. Designed for compatibility with ammonia refrigerant (R 717), this control features a robust bellows system that handles non corrosive liquids and gases common in large scale chillers and cold storage facilities. This unit operates as an "open high" pressure cutout,