Johnson Controls A99BB-400 Temperature Sensor Quick Servicing: The in-line drain

Quick Servicing: The in-line drain design features removable caps for straightforward inspection and flushing during routine maintenance

This 36-inch tube provides the necessary coverage for mid-size commercial ductwork

Will this thermostat work with 277V electrical systems

If the inducer fails to maintain the specified negative pressure

The SPDT (Single Pole Double Throw) configuration allows it to handle diverse switching tasks

Johnson Controls A99BB-400 Temperature Sensor Quick Servicing: The in-line drainThe Johnson Controls A99BB 400 Temperature Sensor is a precision PTC silicon sensor engineered for high accuracy temperature monitoring in commercial refrigeration and HVAC systems. Designed for seamless integration with System 450 controls and Penn A419 A421 series controllers, this thermistor style sensor features a linear resistance to temperature output, minimizing calibration drift in the field. The A99BB 400 is equipped with a 13 foot PVC cable