Mira MB-90, Manual

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Warning
IF THE POSITIVE AIR PRESSURE
FROM THE BLOWER CEASES FOR
ANY REASON, LEAVE THE
CONTAMINATED AREA AS SOON AS
IT IS SAFE TO DO SO. LACK OF
POSITIVE AIR PRESSURE FROM THE
BLOWER MAY REDUCE THE
RESPIRATOR PROTECTION WHICH
COULD RESULT IN SERIOUS INJURY
OR DEATH.
Temporarily positioning the PAPR blower assembly at the front of the waist will facilitate performing a negative leak
pressure test.
If, for any reason, the blower assembly stops operating, becomes very noisy, or the
battery compartment becomes hot to the touch, immediately leave the area requiring
respiratory protection, turn the power switch to the OFF position and determine the
cause of the problem.
Do not submerge the blower assembly in water during use as water will be drawn into the filter elements. If accidental
immersion occurs during use, leave the area requiring respiratory protection, turn the unit off, remove the respirator from
service, and tag it for inspection and repair. If it becomes impossible to inhale through the filter elements after accidental
immersion, proceed as directed above.
If, for any reason, it becomes impossible to inhale through the respirator during use,
the user may have to disconnect the facepiece from the breathing tube or remove
the facepiece. THIS WILL TERMINATE RESPIRATORY PROTECTION AND THE USER
WILL BE BREATHING THE ATMOSPHERE THE RESPIRATOR WAS INTENDED TO
PROTECT AGAINST.
PERFORMING A NEGATIVE LEAK
PRESSURE TEST
EMERGENCY USE
With the unit donned and turned off, close the inlet side of both filter elements by covering them with your palms
or other airtight objects, and press firmly to seal the inlets.
1
Inhale slowly and hold your breath momentarily. The mask should be drawn slightly in toward your face and stay
there, indicating there are no obvious leaks in the system.
2
If air leakage is detected during this procedure, remove and replace the facepiece following the gas mask/full-face
respirator donning procedure before repeating the test. If leakage persists, DO NOT USE THE EQUIPMENT.
3
In addition to poor facepiece fit, leakage can result from loose breathing tube connections, improperly tightened filter elements, damaged or
missing gaskets at the breathing tube and/or filter element connections, a damaged or missing exhalation valve, or other damaged respirator
components. DO NOT USE A DAMAGED OR LEAKING RESPIRATOR. Make repairs and recheck respirator or remove from service and tag it for
repairs by authorized personnel.
To remove the breathing tube from the facepiece (if and when it is safe to do so), unthread the breathing tube from the facepiece.
Note
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