BioPak 240R-NIOSH User Instruction Manual
47C090, Revision C
Page 20 of 25
5. PRACTICAL USE
5.1 Breathing the Apparatus
There is no need to accelerate or deepen
normal breathing rates. The apparatus will
automatically adjust oxygen additions to
match the needs of the user.
5.2 Speaking
The facemasks are provided with speaking
diaphragms that transmit sound from the
interior of the facemask to the external
surrounding environment. Speak slightly
louder and slower than normal making every
effort to clearly pronounce words. Do not
shout.
Optional voice amplification devices can be
attached to the facemask prior to donning to
enhance clarity of speech. Contact
Biomarine
or your local distributor for
details and supply.
Reference system manuals for optional
microphones and communication
systems that may be employed with the
BioPak.
5.3 Alarming System
The wearer must frequently inspect the
pressure gauge and LED throughout the
duration of the mission.
Should the pressure gauge indicate
pressure in the
RED
colored area of the
gauge, the end of service life of the
apparatus is near; and, the wearer shall
retire to a safe location as quickly as
possible to doff the apparatus.
Should the LED flash
RED
and/or the horn
sounds, the wearer shall retire to a safe
location as quickly as possible to doff the
apparatus.
Should the LED cease to flash or is not
flashing
GREEN
, the wearer shall retire to a
safe location as quickly as possible to doff
the apparatus.
5.4 Coolant Replacement
If the breathing air becomes uncomfortable
to the wearer the ice canisters can be
replaced without doffing the apparatus or
breaking into the breathing loop.
Replacement of the ice canisters while
wearing the apparatus will require
assistance.
1. Remove the coolant covers from the
breathing chamber lid.
2. Remove the spent ice canisters from the
breathing chamber lid.
3. Install replacement, frozen coolant
canisters into the breathing chamber lid.
4. Replace the coolant lids on the
breathing chamber lid positioning the lid
handles vertically.
5.5 Emergency Bypass
The emergency bypass is for emergency
use only.
DO NOT
attempt to use the emergency
bypass to cool the breathing gas or clear the
facemask of fogging.
Depress in 1-2 second periods for optimal
use.
Continued use of the emergency bypass will
shorten apparatus duration.
5.6 Emergency Operation
Follow the procedures below in event of the
described emergency situation.
Equipment Failure
Should any component of the apparatus
experience a failure or should the apparatus
upper housing become dislodged, the
wearer shall immediately retire to safe
location to doff the apparatus.
