Embraer EMB145 Operation Manual page 2180

OXYGEN
PURITAN BENNET PBE UNIT
During the donning sequence, a chlorate candle is automatically
actuated as the adjustment straps are pulled to secure the oronasal
mask cone against the face. The oxygen generated by a chlorate
candle will inflate the hood, providing adequate initial breathing volume.
A speaking diaphragm is installed in the oronasal mask cone to
enhance communication.
Determining the unit's serviceability consists in visually checking the
vacuum seal through the clear access door of the hood's container. If
the sealed bag appear tightly compressed, the seal is in good
condition. On the other hand, if the sealed bag appears inflated, the
unit should be replaced.
OPERATION
When use of the hood is needed:
1 - Grasp and strongly pull red access handle to disengage the cover.
Locate red I.D. tag and pull sharply to tear open vacuum-sealed bag.
2 - Pull PBE out of sealed bag and shake hood to open.
3 - Place both hands inside the neckseal opening with palms facing
each other and PBE visor facing downward with the CO2 container
resting on top of hands.
4 - With the head bent forward, guide PBE neckseal over the top of the
head and down over the face using the hands to shield the face and
glasses from the oronasal mask cone.
5 - With both hands, grasp the adjustment straps at the lower corners
of the visor and pull outward sharply to actuate the starter candle.
Within 1-5 seconds, a rushing noise of oxygen entering the hood
will be heard and inflation will be evident.
CAUTION: THE OXYGEN PRODUCED BY PBE UNIT WILL
VIGOROUSLY ACCELERATE COMBUSTION. DO NOT
INTENTIONALLY EXPOSE THE PBE UNIT TO DIRECT
FLAME CONTACT OR REMOVE IT IN THE IMMEDIATE
PRESENCE OF FIRE OR FLAME. DUE TO OXYGEN
SATURATION OF THE HAIR. DO NOT SMOKE OR
BECOME EXPOSED TO FIRE OR FLAME IMMEDIATELY
AFTER REMOVING PBE UNIT.
Page
2-16-25
AIRPLANE
OPERATIONS
MANUAL
Code
4 01
OCTOBER 02, 2001