Air Handler Shutdown and Pressure Adjustment on 4th Floor from 7/25 to 7/29
On 7/25, the Hensel Phelps contractor shut down all air handler units on the 4th floor to test the pressure required to open the doors. However, the main air handler unit on the 4th floor failed to restart. With a major loss of air supply to the 4th floor, all room air differentials were affected. Positive-pressure rooms became less positive, and negative-pressure rooms became more negative as a result. Once the air handler was replaced on Monday, 7/29, the air pressures returned to their original range.
▶️ Recent 7-day graph of the Anteroom air pressure differential
New graphs with higher granular y-axis and MIN/MAX line indicators (from 7/17/2024 to 7/28/2024)
Anteroom Door Sensitivity Adjusted to Close Quicker
Non-HD Door Sensitivity Adjusted to Close Quicker
HD Door Sensitivity Adjusted to Close Quicker
Audible Alarm After 30 Seconds
Removed tape residue
Clear silicone seal behind the mirror in the anteroom
Clear silicone seal behind the signs in the buffer rooms
Clear silicone in crevices around non-HD passthrough box
Eye glass lens cleaner wipes
Sealed grummet holes on sides of hoods
