Scott AIR-PAK 75 Operating & Maintenance Instructions page 27

BEGIN USE OF THE RESPIRATOR
1. Fully depress the center of the air saver/donning switch on top of
regulator and release. The breathing regulator is equipped with an
air saver/donning switch to prevent the rapid loss of air supply when
the cylinder valve is open and the facepiece is removed from the
face or the regulator is removed from the facepiece.
2. If the regulator is not attached to the facepiece, proceed as follows:
a) Verify that the regulator gasket is not damaged and is in place
around the outlet port of the regulator.
b) Align the two flats of the regulator outlet port with the corre-
sponding flats in the facepiece port (the red purge valve on the
regulator will be in the 12 o'clock position). Insert the regulator
into the facepiece port.
c) Rotate the regulator counterclockwise (as viewed from inside
of facepiece) until the red purge valve knob is on the left side
of the facepiece. The lock tab on the regulator will lock into the
facepiece retainer with a "click." When the lock tab is properly
engaged, the regulator will not rotate.
FIGURE 13
I n s t a l l t h e r e g u l a t o r o n
t h e f a c e p i e c e . F u l l y o p e n
the cylinder valve knob by
t u r n i n g c o u n t e r c l o c k w i s e
( a p p r o x i m a t e l y 2 ½ t u r n s ) .
VIBRALERT alarm on regulator
will sound momentarily, then
shut off. The Heads-Up Display
will initialize.
3. Slowly open cylinder valve fully by turning the valve knob counter-
clockwise until it stops (approximately 2 1/2 full turns of the knob).
4. Observe the operation of the alarms:
a) The VIBRALERT end of service indicator alarm will actuate and
then stop.
b) The HEAdS-uP dISPLAY shall initialize for twenty (20) seconds
and then display the cylinder level.
c) The PAK-ALERT distress alarm will actuate when the cylinder
valve is opened and will sound three quick audible chirps accom-
panied by a green flashing on the PAK-ALERT control console.
Refer to the Operating and maintenance instructions for the
installed PAK-ALERT distress alarm. The part number for the
required instructions appears on the PAK-ALERT Sensor module.
If the air saver/donning switch has not been depressed prior to open-
ing the cylinder valve, the VIBRALERT Alarm will not actuate due to
the air flowing freely on the facepiece.
5. With facepiece sealed to face, inhale sharply to actuate respirator.
Air will then be supplied during inhalation.
IF AIR IS nOT SuPPLIEd On FIRST InHALATIOn, CHECK THAT THE
CYLIndER VALVE IS FuLLY OPEn, THE REmOTE gAugE IndICATES
PRESSuRE In THE CYLIndER, And THE FACEPIECE IS SEALEd TO
THE FACE.
NOTE
Page 27 of 48
WARNING
THE CYLINDER VALVE MUST BE FULLY
OPENED FOR PROPER OPERATION OF THE
RESPIRATOR. USE OF A RESPIRATOR WITH
THE CYLINDER VALVE PARTIALLY OPENED
MAY CAUSE A REDUCTION OF THE AIR
SUPPLIED TO THE USER AND/OR A SUDDEN
AND COMPLETE LOSS OF AIR SUPPLIED TO
THE USER. A REDUCTION OR LOSS OF AIR
TO THE USER MAY RESULT IN ExPOSING
T H E U S E R TO T H E AT M O S P H E R E T H E
RESPIRATOR IS INTENDED TO PROTECT
AGAINST.
USE OF RESPIRATOR
CONTINUED ON NExT PAGE...
P/N 595252-01 Rev. B 5/14