EXTENDAIRE SYSTEMS
The adapter hose assembly is approximately 20 inches
long. It has a different quick-disconnect on each end.
1. A Snap-Tite coupler on one end. This connects to the
manifold tee on the air mask intermediate pressure
hose.
2. A Foster quick-disconnect plug on the other end. This
connects to an airline with suitable Foster couplers.
3. A Hansen quick-disconnect plug on the other end.
This connects to an airline with suitable Hansen cou-
plers.
The Foster quick-disconnect has two significant features.
1. It is single action to connect. The coupler is pushed
firmly over the plug to engage.
2. It is a non-locking type. The coupler sleeve is rotated
approximately 1/8 of a turn to disengage.
The Hansen quick-disconnect has two significant fea-
tures.
1. To engage: Slide the outer sleeve on the coupler end
back and hold sleeve. Push coupler firmly over the
Hansen plug and release sleeve to engage coupler.
2. To disengage: Slide the outer sleeve on the coupler
end back (away from the plug). The disconnect will be
ready to separate, remove the coupler.
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. Push the two sides of the quickdisconnect
towards each other firmly. (The plug should advance
into the coupler end approximately 1/8”.) Now, slide
the coupler outer sleeve away from the plug. Pull the
plug out of the coupler
DO NOT install or attempt to use any hose assembly
or fitting other than those supplied by MSA for the
ExtendAire I System. Misuse can result in serious per-
sonal injury or death.
AIRLINE MODE
The cylinder valve on the air mask cylinder must be
closed and remain closed during use in the airline
mode. Failure to do so can result in depletion of the
cylinder air. Misuse can result in serious personal
injury or death.
1. Remove the dust cap from the quick-disconnect plug
on the intermediate pressure hose manifold.
2. Attach the adapter hose. Locate the end with the
Snap-Tite coupler. Push the Snap-Tite coupler onto
the MMR intermediate pressure hose manifold tee.
Pull on the coupling to ensure that it has locked in
place.
3. Clip the other end of the adapter hose to the belt loop
using the “dog-clip.”
4. Turn on the primary air source for use with the airline.
5. Remove the attached dust cap.
6. Push the coupling on the airline hose firmly over the
plug on the adapter hose. Pull on the coupling to
ensure that it has locked into place.
7. Close the cylinder valve on the air mask.
Note:
If operating in the airline mode at the lowest possi-
ble air supply pressures, some Audi-larms may produce
nuisance alarms. Although it is important that you
respond to all alarms immediately, a slight increase in
supply pressure will prevent the nuisance alarms from
occuring. While remaining within the approved pressure
limits, increase the supply pressure in 2 psi increments
until the nuisance alarm ceases.
NIOSH limitations for this device require that not more
than 20 percent of the cylinder air be used during
entry before connecting to the airline.
CYLINDER MODE
To switch from the airline mode back to the cylinder mode
the following disengagement procedure must be followed.
1. Open the cylinder valve on the air mask cylinder. Air
will be delivered to the user.
2. Disconnect the airline from the adapter hose using the
quick-disconnect fitting.
3. Replace the dust cover.
EMERGENCY OPERATION
If the airline supply should fail for any reason as detected
by interrupted breathing, perform the following:
1. Open the air mask cylinder valve.
2. Disconnect the airline quick-disconnect fitting from the
adapter hose.
3. Replace the dust cover.
4. If air is still not delivered to the facepiece, the second
stage bypass should be activated. Immediately return
to fresh air.
AIR SUPPLY
1. Air hose. Any one or combination of hoses ranging
from 8-300 feet may be used. A maximum of 12 sec-
tions of hose can be used to make up the maximum
working length of hose. The adapter hose is consid-
ered one section of hose (P/N 10127109 Foster, P/N
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