Change Out - 3M Versaflo TR-300 PAPR Manual

3M™ Versaflo™ Powered and Supplied Air Respiratory Systems
Change-out g
The HE filter must be changed if:

the low airflow alarm is activated; ;

the airflow as shown by the airflow indicator falls below 6 CFM; or

the HE filter becomes damaged or wet.

For filters with nuisance level organic vapor relief,
earlier if smell, taste or irritation is detected.
The TR-3600 should be replaced when it is dirty or damaged and The TR 3600 should be replaced when it is dirty or damaged and
 
every time the HE filter is replaced.
The TR-362 should be replaced any time that any damage is noted.

An excessively loaded HE filter, prefilter or spark arrestor/prefilter

may also reduce battery pack run time. If run time is shorter than
expected replacing the filters may resolve the problem.
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replace filter as described or