PA20 Series Powered Air-Purifying Respirator
PA1/PA2 Blower Assembly User Manual
6
Donning the Blower and Respirator
Prepare to don the blower and hood in a safe, hazard- free
area and do the following:
Check that the blower unit is securely clamped closed.
Prior to assembling the system, fit the blower and belt
around the user’s waist. With the blower at the rear of the
user, adjust the belt for a comfortable fit.
Remove the belt and blower.
Ensure that the filter is an approved filter suitable for the
challenge being applied and is compatible with the PAPR.
The use of any filter not approved with the PA1BU and
PA2BU units may put the user at risk and could result in
death or serious injury.
For Respirator Hoods:
Insert the breathing tube 5 inches into the air entry sleeve
at the rear of the hood being used
(see Figure 6)
.
Install nylon clamp over air entry sleeve and breathing
tube, inserting clamp locks through two holes in plastic
anchorplate that is sewn into hood. Locks should face away
from user’s neck
(see Figure 7)
.
Engage clamp locks and squeeze together until tight.
For Loose-Fitting Facepiece Hoods:
The 20LFM and 20LFL hoods have a sewn-in breathing tube
connector on the back. The PA20LFBT breathing tube has a
special connector on the hood end with bayonet type pins.
Insert the bayonet connector of the PA20LFBT breathing
tube in the hood connector and turn clockwise until it locks
in place
(see Figure 8)
.
For PA20 Powered Air-Purifying Respirators:
For PA20 powered air-purifying respirators, attach other
end of breathing tube to PA1BU or PA2BU by screwing
the adapters together.
Remove any protective film covering the visor of the hood.
Put on the belt and blower assembly and make any final
adjustments to the belt as necessary, keeping the breathing
tube and hood behind the head.
Switch on the blower.
Place the hood on the head making any final adjustments to
the fit as required at this time to ensure a comfortable and
stable fit. See the CC20/PA20 Series Tychem Hood User
Manual.
PA1BU Low Battery Alarm
The PA1BU Blower unit is fitted with a Low Battery Alarm.
This device will activate if the battery power is below
acceptable levels. The device is indicating that insufficient
airflow is imminent. The user should do the following:
Leave the hazard area, remove the headpiece, disconnect
the breathing tube from the hood and check the airflow with
the airflow indicator (see page 5).
If the airflow indicator indicates insufficient airflow, the
battery should be fully charged (see “Battery Pack” on
page 4).
The PA1BU Low Battery Alarm should not be relied upon as
an indication of a low air flow condition. Only the Air Flow
Indicator should be utilized for checking for adequate
air flow.
NOTE
The PA1BU and PA2BU blowers are provided with a
circuit to protect the battery. It will not allow the
battery to be discharged below a safe voltage for
the cells, regardless of airflow, without the Alarm
sounding. When the Low Battery Alarm sounds
(PA1BU blower only) and the filter is not clogged,
the battery should be recharged to protect the
battery and thereby prolong the working life of the
unit. If the ball in the Airflow Indicator is
BELOW
or
PARTLY BELOW
the
PASS LINE
with a fully
charged battery, the filter may need to be changed.
Clean off the outside of the unit to prevent contaminated
material falling into the blower unit when it is opened and
then change the filter.
WARNING
Donning the Blo
w
er/Lo
w Battery Alarm
WARNING
Do not enter a hazardous area until you are sure that
the blower and hood are fully operational and the
blower is running. The user should periodically leave
the hazardous area to check the airflow through the
system. If the PA1 Low Battery Alarm should sound, or
if the user experiences any laboring of breath, any
grittiness between the teeth or any odors from the
hazard, he/she should leave the hazardous area
immediately. Failure to observe these warnings could
result in death or serious injury.
Figure 6
Figure 7
Figure 8