5
PA30 Series Powered Air-Purifying Respirator
PA3/PA3IS Blower Assembly User Manual
Mounting the Breathing Tube on the
PA3BU/PA3ISBU Blower
Ensure that a rubber gasket is in place in the breathing tube
coupler on the blower unit.
Screw one end of the breathing tube into the blower unit (hand
tight is sufficient)
(see Figure 2)
.
Ensure that neither the breathing tube nor the filter is blocked.
Ensure that the ON/OFF Switch is in the OFF position.
Switch on the blower. If the Low Voltage Alarm sounds at this time,
the battery needs to be recharged. See instructions on page 4
regarding properly charging the battery.
NOTE
On the PA3BU unit, the low voltage alarm will sound a
short beep as the power switch is cycled on and off,
indicating that the alarm is functioning properly. The
alarm will sound continuously to indicate low voltage.
Checking Airflow with the Airflow Indicator
(PA1AFI)
With the blower switched ON and the filters/cartridges mounted,
take the free end of the breathing tube in one hand, hold it upright
and place the Airflow Indicator into the end of the tube
(see Figure 3)
.
Apply a light downward pressure to the Airflow Indicator to get a
reasonable seal at the breathing tube end. Ensure that the air
outlet holes in the Airflow Indicator tube are not blocked. Two
hands may be used if preferred, one to hold the breathing tube
and one to hold the Airflow Indicator.
The position of the ball in the Airflow Indicator should be
observed. If any part of the ball is below the PASS LINE on the
Airflow Indicator, check for:
• Blower malfunction.
• Clogged or damaged Air-Purifying filter elements on the HE
filters or the combination cartridges with HE filters. See
“Mounting and Replacing Cartridges on the Blower Unit” on
page 7.
• Low voltage or battery malfunction.
If the ball is completely above the PASS LINE on the Airflow
Indicator, then the system is ready for use.
NOTE
On the PA3BU unit, due to the back-pressure of the ball,
the Low Voltage Alarm may sound when a reading is
being taken. If the ball bounces, let it stabilize, and then
read the lowest point.
When the blower passes the flow test, it is ready to use.
If the blower malfunctions during use in a hazardous area:
DO NOT
remove the respirator hood, blower or waist-belt while
in the hazardous area.
DO
remain calm and
LEAVE
the hazardous area immediately.
After reaching a hazard-free area, immediately remove the
respirator.
DO NOT
use a blower that fails the flow test.
Use
ONLY
Bullard cartridges which comply with and have the
NIOSH approval label and which are appropriate for the
contaminant.
Failure to observe these warnings could result in death or
serious injury.
WARNING
Mounting the Br
eathing T
ube/Checking Airflo
w
www.bullard.com
Figure 2
Figure 3
Gasket
