Description
The Johnson Controls A421ABT-02C Single Stage Electronic Temperature Control regulates compatible heating or cooling equipment from temperature feedback. Its electronic sensing circuit monitors the connected temperature input and switches a single output stage when the programmed operating condition is reached. The 120240VAC rating allows the control to operate from compatible electrical supply circuits. The controller installs with the sensor and electrical wiring connected to the corresponding equipment terminals in HVAC systems. By rotating the connected load according to temperature changes, it supports controlled heating or cooling operation, maintains the selected temperature range, and coordinates equipment response during normal operating cycles.
