Extendaire Ii Repair And Service; Repair And Service - MSA ExtendAire II Instructions D'utilisation

NOTE: For rescue belts, pouch must
be attached to the quick-release strap
on the backside for the FireHawk
Rescue Belt II (or to the auxiliary strap
for the Rescue Belt I)
"
Placing the regulator holder on the quick-release straps of the
FireHawk Rescue Belt II will impede the use of the quick-release
function of the rescue belt. Failure to follow this warning can result
in serious personal injury or death.
NOTE: For rescue belts, the regulator
holder must be moved from the
auxiliary strap to the waist belt.
NOTE: For swiveling lumbar pads
found on the AirHawk II Air Masks
or NFPA 1981, 2002 Edition air masks,
the left waist belt pull-strap must be
routed as shown.
12. Coil the ExtendAire II System
manifold and hose and insert
into the pouch. Orient the
manifold so that it is near the
opening of the pouch.
ExtendAire II Repair and Service
WARNING
13. Close the pouch and snap all
three (3) snaps closed.
"
DO NOT pressurize the system until all hoses and fittings are
properly secured with u-clips. Pressurizing the system with
unsecured hoses can cause the hoses to release explosively.
Properly install and secure all hoses and fittings before pressuring
the system. Failure to follow this warning can result in serious
personal injury or death.
Checking for Leaks and Proper Operation
The air mask must hold system pressure without leaks to provide
adequate protection.
1. Pressurize the air mask by attaching the Audi-Larm Audible Alarm
Assembly to a fully charged cylinder.
2. Close the bypass on the Firehawk Second Stage Regulator and
open they cylinder valve completely. The FireHawk M7 Control
Module or pressure gauge will indicate the pressure of the
system.
3. Close the cylinder valve and watch the FireHawk M7 Control
Module or pressure gauge. There should not be a drop in
pressure if the system is leak tight. (The maximum allowable
pressure drop is 100 psi in 10 seconds)
4.
If there is a noticeable decrease in pressure, a leak test is required
before using the air mask.

REPAIR AND SERVICE

The repair and service of the ExtendAire II Intermediate Pressure
Accessory Kit is designated by MSA as end user serviceable.
The following repairs require that the cylinder be disconnected
from the air mask. For additional illustrations and supplemental
instructions, refer to the Installing the ExtendAire II Intermediate
Pressure Accessory Kit section of this manual.
Replacing the Dust Cover
To replace the dust cover, the ExtendAire II Dust Cover Kit, P/N
10111351, is required.
1. Remove the two (2) screws in the first stage regulator bracket and
remove the PR14 First Stage Regulator. Do not remove the
regulator bracket from the backplate. Discard the screws.
2. Remove the lower u-clip and the ExtendAire II emergency
breathing hose from the PR14 First Stage Regulator.
3. Remove the ExtendAire II emergency breathing hose from the
hose restraint and from the pouch.
7
WARNING
MSA 419 (L) Rev. 5 - 10110648