Johnson Controls A19AAC-9 SPDT Thermostat Temperature Control 100°F/240°F 6" Capillary1 HP,

The Johnson Controls A19AAC-9 SPDT Temperature Control is essentially a single-stage remote bulb thermostat that is used in controlling temperatures in heaters and coolers amongst other HVAC facilities. It employs a liquid filled sensor with a capillary tube to measure temperature from a distance. The features include a SPDT switch that activates heating or cooling equipment up to 1HP depending on the set temperature and the actual temperature. This is well suitable for the various HVAC uses as it covers a temperature level of 100°F – 240 °F. In the same way, the 6°F differential also prevents the HVAC system from short cycling which is damaging to the system and may also be beneficial to the energy efficiency.