Optimized Performance: Maintains precise superheat to prevent liquid slugging and maximize heat transfer efficiency

the momentary start switch frequent contact points may have oxidized or the internal spring failed

Always verify electrical loads against the SPDT contact ratings to ensure compatibility with your existing control circuit

170" ID and ability to maintain structural integrity in low-pressure pneumatic pulse applications up to 1 atm

Signal Integrity: Minimizes signal noise to maintain accurate flame sensing through the ignition lead

Johnson Controls A28AA-20 Temperature Control Els PW 29614 Optimized Performance: Maintains precise superheatThe Johnson Controls A28AA 20 is a heavy duty two stage temperature control designed for multi stage heating or cooling applications in commercial refrigeration and HVAC systems. Featuring dual SPDT switches, this controller allows for independent sequencing of equipment loads, making it ideal for managing staged compressor banks or ventilation systems. The unit operates across a wide voltage range, including 120 208 240 277 Vac, ensuring