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Designed for the Williams 5507 Series and 6007 Series
Debris Resistance: True line-sized internals and an integral strainer help prevent sediment from compromising valve seating
Built for durability in commercial and residential settings
Can this transducer be used with ammonia systems
Check for corroded electrical connections or loose spade terminals before assuming the contactor itself has failed
Johnson Controls A28AA-20 Temperature Control 30067439-890 Designed for the Williams 5507The 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
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