Using The Respirator In Standby; Emergency Operation - 3M SCOTT AIR-PAK X3 PRO Operating & Maintenance Instructions

Using the Respirator in Standby

When the respirator is in standby, it is in place on your body with the shoulder straps properly adjusted and the waist
belt buckled. However, the facepiece is not donned and the respirator is not being used.
1 Leave the cylinder valve fully open and verify that the air-saver mechanism is engaged. Remove the facepiece
but leave the regulator attached to the facepiece.
2 Keep the facepiece ready for use in one of the following ways:
•
Hang the facepiece from the snap clip on the left shoulder pad (if installed).
•
Hang the facepiece from the optional neck carrying strap.
NOTE
To prevent damage to the facepiece, do not let the facepiece hang loose without securing it.
3 Detach the regulator from the facepiece until needed.
a Place your right hand over the regulator cover with your thumb on the regulator lock tab or latch.
b Engage the lock tab or latch and rotate the regulator 1/4 turn clockwise (viewed from inside of facepiece).
c When the red purge valve is in the 12 o'clock position, remove the regulator from the facepiece.
You can store the regulator on the optional regulator holder on the waist belt.

Emergency Operation

The respirator functions automatically, requiring only the opening of the cylinder valve and the proper donning of the
facepiece to begin use and the closing of the cylinder valve to end use. If there is an actual or suspected malfunction,
use one of the emergency procedures listed below.
These emergency operation procedures are for emergency use only and are meant to supplement — not replace —
the emergency procedures prescribed by your respiratory protection program. If you must perform an emergency
operation, leave the hazardous area at once. Following these emergency procedures will increase the rate of
consumption of the air supply and may cause the end-of-service indicator alarms to diminish in intensity or stop
completely. Failure to leave the hazardous area immediately may result in serious injury or death.
•
If any end-of-service time indicator alarm (Vibralert or HUD) actuates during use, even if the air supply has not
been depleted to approximately 33% of full rated capacity, leave the contaminated area at once.
•
If the air supply is partially or completely cut off during use, fully open the red purge valve on the regulator by
turning it counterclockwise (the pointer on the knob points downward) and ensure that the cylinder valve is fully
opened (turned fully counterclockwise). Leave the contaminated area at once after opening the purge valve.
•
If the air supply begins to flow freely into the facepiece during use, fully open the red purge valve knob on the
regulator by turning it counterclockwise (the pointer on the knob points downward). Partially close the cylinder
valve by pushing in and rotating clockwise to regulate the flow of air to satisfy your air requirements. Do not close
the cylinder valve completely. Leave the contaminated area at once after partially closing the cylinder valve.
•
If there is a blockage of air flow or sudden and complete loss of the system air supply and respiratory protection,
leave the contaminated area at once. Use all necessary precautions and follow emergency procedures
prescribed by your established respiratory protection program.
If you employ any of the above procedures, remove the respirator from service and tag it for repair by authorized
personnel.
P/N 595373-01 Rev C 202004
SPECIAL USE SITUATIONS
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