Johnson Controls A19AAD-12 Remote Bulb Temperature Control Switch -30/50°F,Open-Low, 7Ft Capillary ,2.5Feet Differential

The Johnson Controls A19AAD-12 Remote Bulb Temperature Control Switch is a device designed to maintain a desired temperature range in various HVAC applications. It features a remote sensor bulb connected by a 7-foot capillary tube to a switch unit. The sensor detects the surrounding temperature and triggers the switch based on pre-set settings. This switch operates with a Single Pole, Single Throw (SPST) mechanism, meaning it controls a single circuit with an "on" or "off" state. When the temperature falls below the set point (adjustable between -30°F and 50°F), the switch turns "on," potentially activating heating equipment. Conversely, if the temperature rises above the set point with a 2.5°F differential, the switch turns "off," potentially stopping heating equipment. This remote temperature control offers several benefits. Firstly, it allows for precise temperature control in areas where a traditional wall-mounted thermostat might not be ideal, like within ducts or near heat sources.