Refrigerant Alarm Monitoring

A small number of mechanical spaces have been identified on the Seattle campus that need refrigerant alarm monitoring due to the combination of quantity of refrigerant present, room ventilation (or lack thereof), and room size. In the chart below are listed the locations on the main Seattle Campus that require a portable refrigerant alarm monitor when entering, those areas with permanent refrigerant alarms linked to the fire alarm panel (FAP), and those areas that no longer require monitoring due to system removal or modification that drops the circuit(s) below the refrigerant volume of concern. To enter those spaces requiring a portable monitor, FS employees must be trained on the use and operation of the portable monitors, or be accompanied by a trained employee.

General Notes

  1. Refrigerant type and quantity taken from data provided by the Refrigeration Shop (quantity is from largest circuit only)
  2. Room volume was calculated in various manners
    • If RA Drawings were available that area was used and a 10’ height was assumed unless other sections were available
    • If RA Drawings were not available mechanical drawings were scaled and a 10’ height was assumed if other sections were not available
  3. Quantity of refrigerant in the room was calculated using the values from General Notes 1 and 2
  4. The maximum amount of refrigerant allowed per the Seattle Mechanical Code (current version)
  5. The ventilation system may not be controlled by a refrigerant purge condition
  6. Year of installation estimated based on record drawings
  7. Actual quantity for Hitchcock Hall is unknown, this quantity was estimated until final value is obtained from the contractor
  8. The chillers at Fish Teach, Henry Arts Gallery, and Nuclear Physics Laboratory have been retired and monitoring is no longer required at this time.
  9. The Mary Gates chiller charge-per -crcuit to mechroom volume falls under the requirement for monitoring
  10. C104 chiller replaced in 2010 with a chiller that contains 11.75 lbs R-410A.
  11. G Wing chiller replaced in 2010 with a chiller that contains 2 circuits of R134A 46lbs/each.