Operational Testing - Scott 2.2 Operating & Maintenance Instructions

REGUlAR OPERATIONAl INSPECTION CONTINUED...

OPERATIONAL TESTING

1. Check that the breathing regulator purge valve (red knob on regula-
tor) is closed (full clockwise and pointer on knob upward).
2. Fully depress the center of the air saver/donning switch on the top
of the regulator and release.
3. Slowly open the cylinder valve by fully rotating the knob counterclock-
wise (approximately 2 1/2 turns).
a) VIBRALERT alarm shall actuate and then stop.
b) The HEADS-UP DISPLAY will initialize with all five lights on for
twenty seconds followed by display of cylinder supply level. If the
LOW BATTERY light at the far right of the display remains lit or
begins to flash, replace the batteries according to the BATTERY
REPLACEmENT section of this instruction before proceeding.
c) If the respirator is equipped with a PASS device, the PAK-ALERT
distress alarm will be actuated when the cylinder valve is opened.
Refer to REGULAR OPERATIONAL INSPECTION section of the
Operating and maintenance instructions for the PAK-ALERT dis-
tress alarm.
4. Check that the remote pressure gauge is operating properly and that
it reads within 10% of the value on the cylinder pressure gauge.
5. Don the facepiece or hold the facepiece to the face to affect a good
seal. Inhale sharply to automatically start the flow of air. Breathe
normally from the facepiece to ensure proper operation.
6. Remove facepiece from face. Air shall freely flow from the face-
piece.
7. Fully depress the air saver/donning switch on the top of regulator
and release. The flow of air from the facepiece shall stop. Examine
the complete respirator for air leaks. There shall be no leakage of
air from any part of the respirator.
8. The regulator is equipped with a red purge knob which allows air
to flow into the facepiece in an emergency without breathing on the
respirator. The purge control is also used to release residual air
from the respirator after the cylinder valve is turned off. Check the
purge valve as follows:
a) Rotate purge valve 1/2 turn counterclockwise (pointer on knob
downward). Air shall freely flow from the regulator.
b) Rotate purge valve 1/2 turn clockwise to full closed position
(pointer on knob upward). Air flow from regulator shall stop.
P/N 595279-01 Rev. B 5/14 Page 16 of 48
WARNING
I F T H E E N D O F S E R V I C E I N D I C AT O R
AlARMS DO NOT ACTUATE AS DESCRIBED
IN THIS INSTRUCTION, DO NOT USE THE
RESPIRATOR. REMOVE THE RESPIRATOR
FROM SERVICE AND TAG IT FOR REPAIR
By AUTHORIZED PERSONNEl. USE OF AN
IMPROPERly OPERATING END OF SERVICE
I N D I C ATO R M Ay R E S U lT I N S E R I O U S
INJURy OR DEATH.
WARNING
lEAKAGE OF AIR FROM A RESPIRATOR
MAy INDICATE A POTENTIAlly SERIOUS
DEFECT. AIR lEAKAGE MAy REDUCE THE
D U R AT I O N O F U S E A N D / O R T H E T I M E
REMAINING AFTER AN END OF SERVICE
AlARM ACTUATES OR MAy PREVENT AN
END OF SERVICE AlARM FROM ACTUATING.
USE OF A RESPIRATOR EXHIBITING AN
AIR lEAK MAy RESUlT IN EXPOSING THE
RESPIRATOR USER TO THE ATMOSPHERE
T H E R E S P I R AT O R I S I N T E N D E D T O
PROTECT AGAINST WHICH COUlD lEAD
TO SERIOUS INJURy OR DEATH.