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4. Donning Instructions:
4.1 When to use the M-20
The M-20 should be used immediately at the first indication of a fire or explosion
even though no smoke is visible. Carbon monoxide is odorless and colorless, so
you could breathe fatal amount of the gas before smoke is present. If you
suspect an oxygen deficient atmosphere, put on the M-20 since it also gives you
protection in an oxygen depleted atmosphere. Don
’t wait: put on the apparatus
and escape to fresh air.
Possible Indications of an emergency:
1. Sight of smoke
2. Smell of smoke
3. Sight of fire
4. Fire alarm or carbon monoxide alarm
5. Sudden increase of air temperature
6. Sound of explosion
7. Vibrations of explosion
8. Interruption of ventilation
9. Someone around you has difficulty breathing or passes out
In the event of an emergency, always
don your self-rescuer before attempting to
escape or help others.
4.2 How to Use the M-20
4.2.1 Donning the M-20:
1.) Release yellow lever and discard cover.
2.) Remove unit by pulling yellow neck strap upwards.
3.) Insert yellow mouthpiece.
4.) Fit yellow noseclip
5.) Fit and adjust yellow neck strap
6.) Breathe through mouth and escape.
These are the six fundamental steps that should be practiced numerous times by
the trainees.
Depending on style of hardhat used, it may be necessary to remove the hat before
fitting the neck strap.
