MSA AirElite 4h User Manual

User Advisory
MSA AirElite 4h Breathing Apparatus
October 2024
PLEASE READ NOW AND TAKE ACTION
Dear MSA Customer,
MSA is issuing this User Advisory to inform you of an updated start-up and donning procedure for
the MSA AirElite 4h Closed Circuit Breathing Apparatus.
MSA has received an isolated report from a customer that recently had an occurrence of a canister
malfunction during start-up of the device. Our investigation has determined that the likelihood for
another occurrence is very low.
MSA has not received any reports of injuries associated with this condition. However, it is necessary
that you follow the actions outlined in this notice.
The new procedure requires unit startup prior to donning the device. Further, the new procedure
requires the user to wait three minutes after the function test before connecting the hose to the face
mask, and another two minutes before tightening the waist belt.
Figure 1 – MSA AirElite 4h Closed Circuit Breathing Apparatus
Start-up and Donning Procedure
All customers must follow this new start-up and donning procedure detailed below, which replaces
the procedures defined in section "4 Operation" of the Operating Manual (10067731 rev 10). The
Operating Manual for the Air Elite will also be updated to Revision 11 to reflect this change.
Warning!: Start the device in a non-hazardous area that is free of flammable objects and equipped
with suitable fire extinguishing capabilities (metal box, sand).
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