Abstract: A monitoring system is configured to monitor an environment within an enclosure of a heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system. The monitoring system includes a sensor configured to acquire data indicative of an environmental parameter value within the enclosure. The monitoring system also includes a controller configured to receive the data from the sensor, to determine occurrence of a thermal event within the enclosure based on the data, and to instruct a circuit breaker of the HVAC&R system to transition to a fault configuration in response to determining the occurrence of the thermal event.

Abstract: A security door is mounted for hinged movement on a frame and includes a wrap-around right-angle member mounted for pivotal movement at an edge of the door. In use the wrap-around member projects over a portion of the frame and provides additional locking. In a preferred form the member is controlled by a bar that also inserts and withdraws one or more locking bolts at the same time.