Page 11 of 32
P/N 89332-01 Rev F 7/11
OPERATIONAL TESTING
1. Fully depress the center of the air saver/donning switch on the
top of the regulator and release.
2. Slowly open the cylinder valve by fully rotating knob counterclock-
wise. The bell alarm shall actuate and then stop. There shall be
no airflow from the facepiece
3. Don the facepiece or hold the facepiece to the face to effect a good
seal. Inhale sharply to automatically start the flow of air. Breathe
normally from the facepiece to ensure proper operation.
4 Remove facepiece from face. Air shall freely flow from the
facepiece.
5. Fully depress the center of the air saver/donning switch on the
top of regulator and release. The flow of air from the facepiece
shall stop.
6. Rotate purge valve 1/2 turn counterclockwise (pointer on knob
downward). Air shall freely flow from the regulator.
7. Rotate purge valve 1/2 turn clockwise to full closed position
(pointer on knob upward). Airflow from regulator shall stop.
8. Push in and rotate cylinder valve knob clockwise to close. When
cylinder valve is fully closed, open purge valve slightly to vent
residual air pressure from system. The bell alarm shall actuate
as the pressure drops below approximately 1/4 full. When airflow
stops, return purge valve to the fully closed position (pointer on
knob upward).
CAUTION
DO NOT USE TOOLS TO OPEN OR CLOSE
THE PURGE VALVE. OPEN OR CLOSE BY
USING FINGER-PRESSURE ONLY. ROTATION
OF THE PURGE VALVE IS LIMITED TO 1/2
TURN. USE OF TOOLS TO OPEN OR CLOSE
PURGE VALVE MAY RESULT IN DAMAGE TO
THE PURGE VALVE.
WARNING
FAILURE TO CHECK ENGAGEMENT OF
THE COUPLING AS DESCRIBED MAY LEAD
TO HOSE SEPARATION AND LOSS OF
BREATHING AIR RESULTING IN SERIOUS
INJURY OR DEATH.
WARNING
IF THE END OF SERVICE INDICATOR BELL
ALARM DOES 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
INDICATOR BELL ALARM MAY RESULT IN
SERIOUS INJURY OR DEATH.
CAUTION
WRENCHES SHALL NOT BE USED TO
TIGHTEN THE HOSE COUPLING. OVER
TIGHTENING THE HOSE COUPLING MAY
DAMAGE THE NIPPLE SEAL.
AV-3000 FACEPIECES ONLY
FIGURE 4
BLACK Nose Cup
BEHIND Face Seal
FIGURE 5
GRAY Nose Cup
IN FRONT OF Face Seal
BLACK
BEHIND
FACE SEAL
GRAY
IN FRONT OF
FACE SEAL
AV-2000 FACEPIECES ONLY
AV-2000 Nose Cup
Always BEHIND the Face Seal
FIGURE 6
b) The AV-2000, the Weld-O-Vista, and the SCOTT-O-VISTA, the
Nose Cup always goes BEHIND the face seal REGARDLESS
of the color of the nose cup. See FIGURE 6.
12. Verify that the facepiece is clean.
13. Adjust the head straps to the full outward position.
If no damage is found, proceed to the
OPERATIONAL TESTING.
CAUTION
OVERTIGHTENING THE CYLINDER VALVE
MAY CAUSE DAMAGE THAT COULD RESULT
IN LEAKAGE OF AIR FROM THE CYLINDER.
USE NO TOOLS TO CLOSE THE CYLINDER
VALVE.