known for its thermal shock resistance and reliable performance in 120V gas heating applications

1 and HKN4460

it is UL listed for pressures up to 650 PSIG

s line-voltage operation eliminates the need for external step-down transformers at the terminal unit

Johnson Controls A28AA-4 Temperature Control Els PW 29614 known for its thermal shockThe Johnson Controls A28AA 4 is a heavy duty two stage temperature control designed for versatile HVAC applications requiring sequenced switching. This electro mechanical thermostat features dual SPDT switch action, allowing for precise control over two separate circuits based on temperature fluctuations. With a wide 30 to 110 degree setpoint range and a multi voltage capacity of 120 208 240 277 Vac, it is a standard component for commercial cooling