MSA FireHawk M7, Инструкция по эксплуатации и руководство пользователя, Страница: 49 / 56

EXTENDAIRE SYSTEMS
INSTRUCTIONS FOR USE
GENERAL INFORMATION
Two air masks equipped with an ExtendAire System can
share a common air supply during emergency escape.
When connecting two ExtendAire Systems, two
ExtendAire II Systems or one ExtendAire System and one
ExtendAire II System, both users will receive intermediate
pressure air from the donor's first stage regulator and
cylinder. The duration of the remaining air supply will be
reduced by at least half.
The SCBA is approved by NIOSH without inter-connecting
two users to one apparatus. NIOSH does not certify
“buddy breathers”. Therefore, the attachment of the
receiver's regulator to the donor's apparatus voids the
NIOSH approval for both air masks.
Air Hose: When used as a combination apparatus, the
device shall be supplied with respirable air through air
supply hose with a minimum length of 8 feet and maxi-
mum length of 300 feet within the pressure range of 85-90
psi. A maximum of 12 sections of straight or uncoiled air
supply hose may be used in making up the working
length of hose. When using coiled hose, a maximum of
six sections may be used and each section is considered
to be 50 feet long. Hose sections vary from 8 feet to 100
feet lengths. The air-line connection to the apparatus is to
be made through approved quick-disconnects only. The
purity of the air supply is the responsibility of the user. The
respirator is approved only when the air supplied meets
the requirements of the Compressed Gas Association
Specification G-7. 1989 quality verification level (Grade) D
for Gaseous Air.
Use this emergency escape breathing system for life
threatening emergencies and simulated training exer-
cises only. All other adequate means of escape must
be considered before using this device.
• During use the air supply, and consequently the
service time, is reduced approximately in half.
Before connecting two users make sure the air
supply is sufficient for both users to escape; other-
wise do not use the system.
• DO NOT use the system if the donor's audible
alarm is ringing.
• The NIOSH Approval for both apparatus are void
when this device is used, due to the difficulty in
maneuvering during escape. Exercise extreme care
while connected together. Mobility and range of
motion will be limited when donor's and receiver's
air masks are connected.
• Maintain slack in the air lines during maneuvering
and while connected together. DO NOT pull on the
hoses.
If the above measures cannot be followed or to pro-
vide greater escape protection, use the Quick-Fill
System. It maintains approval while transfilling and
does not exhibit the above hazards.
DO NOT use the Quick-Fill ® System, URC Assembly, or
ExtendAire System accessories if there is any possibil-
ity that the environment contains a CBRN warfare
agent. These air mask accessories are not approved
for use in atmospheres containing CBRN warfare
agents. Misuse can result in serious injury or death.
EMERGENCY ESCAPE BREATHING SYSTEM:
INSTRUCTIONS FOR USE
The ExtendAire Systems use Snap-Tite quick-discon-
nects.
The Snap-Tite quick-disconnect has two significant fea-
tures.
1. It is single action to connect. The coupler is pushed
firmly over the plug to engage.
2. It is a locking type that requires two actions to discon-
nect.
a. Push the two sides of the quick-disconnect towards
each other. (The plug should advance into the cou-
pler end approximately 1/8".)
b. Slide the coupler’s outer sleeve away from the plug.
Pull the plug out of the coupler. Ensure that unused
quick-disconnect plugs and couples are protected
by dust caps.
DO NOT install or attempt to use any hose assembly
or fitting other than those supplied by MSA for the
ExtendAire System. Misuse can result in serious injury
or death.
PREPARATION FOR USE
BEFORE ENTERING A TOXIC ATMOSPHERE
1. Don the apparatus as described in the donning sec-
tion.
a. ExtendAire System - Ensure proper engagement of
the Snap-Tite quick-disconnect coupling on the
intermediate pressure hose (at the manifold tee).
b. ExtendAire II System - Ensure Manifold and hose
are fully contained in the ExtendAire II System
pouch and that the snaps are fastened.
49 TAL 1705 (L) Rev. 18 - 10082858