www.bullard.com
PA30IS Series Powered Air-Purifying Respirator
PA3IS Blower Assembly User Manual
5
Mounting the Cartridges / Donning the Blo
w
er
Mounting and Replacing Cartridges on the Blower Unit
The useful life of a chemical cartridge for vapors and gases will vary with the
concentration and nature of the contaminant, the breathing rate of the respirator
wearer, and ambient temperature and humidity.
The Occupational Safety and Health Administration (OSHA) regulations 29 CFR
1910.134 require that the employer must implement a change schedule when
using Air-Purifying respirators for protection against gases and vapors, if there
is no end-of-service-life indicator on the cartridges. The change schedule must
be based on objective data that will ensure that the cartridges are replaced
before the end of their service life. Factors to consider include workplace condi-
tions such as contaminant concentration, relative humidity, temperature, work
activities, respirator use pattern (e.g., continuous or intermittent use), presence
of other contaminants, potential for contaminant migration/desorption, health
effects of the gas or vapor, and the presence of any warning properties. Contact
Bullard for further information on change-out schedules.
High efficiency particulate filters must be replaced when retained particles clog
the filters and reduce air flow below acceptable levels, as indicated by testing
with the Air Flow Indicator.
To Replace Cartridges
Remove the air-purifying element from its packaging, and inspect for damage. If
in doubt do not use.
Check that the air-purifying element has not exceeded its “use-by” date and that
the connecting thread is in good condition.
Check that the air-purifying element is appropriate to the hazard. If in doubt
consult your respirator program administrator or supervisor.
Check that the threads in the blower unit port are in good condition and clear of
contaminant.
Check that the PA3ISBU blower ports
have the rubber gasket seals present.
Remove the air-purifying element
seals
(see Figure 4)
.
Screw the air-purifying elements into
the receptacles
(see Figure 5)
until the cartridge is hand tight.
DO
NOT OVER-TIGHTEN.
When using the two PAPRFC1 filter
cartridges, install the filter plug into
one of the ports. DO NOT OVER-
TIGHTEN (Figure 6).
Donning the Blower and Respirator
Prepare to don the blower, battery and hood in a safe, hazard-free area and do
the following:
Check that the cartridges are properly mounted on the blower unit.
Prior to assembling the system, place the battery in the battery compartment
on the back of the blower. Make sure that the correct battery is used in the ap-
propriate blower unit. (See instructions and warning on page 2). 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 cartridges used are suitable for the contaminant in question and
are compatible with the PA3ISBU Blower Unit.
WARNING
The use of any cartridge not approved with the PA3ISBU blower units may put
the user at risk and could result in death or serious injury.
Donning the PA3ISBU with the CC20
Series Hood
Adjusting and Installing Headband Suspension
in Hood
NOTE
20LF and 20LF2 series loose-fitting facepiece hoods have a sewn-in
headband.
NOTE
RT Series hoods do not use a suspension.
To change the headband size, unlock the four pins from the sizing holes. Place
the headband on your head. Pull down, allowing headband to expand until it feels
comfortable. The headband will automatically adjust to your size. Lock into place
by pushing the four pins into the sizing holes (Figure 7).
NOTE
If using the optional 20RT ratchet headband suspension, refer to the
instruction sheet provided with the 20RT.
Adjust Crown Straps for Vertical Fit
To improve suspension comfort, adjust crown
straps vertically by repositioning the crown
strap posts in the crown straps. Vertical
adjustment makes the headband ride higher or
lower on the wearer’s head. To adjust, push
crown strap post from slot, move to new slot,
and snap in to secure. Move key to desired
vertical position. Repeat for other crown strap
post (Figure 8).
Figure 4
Figure 5
Figure 6
8
64
7
63
7
62
7
61
7
60
7
59
7
58
7
57
6
56
6
55
6
54
6
53
7/8
3/4
5/8
1/2
3/8
1/8
7/8
3/4
5/8
1/2
SIZE
Figure 7
Figure 8
Crown strap
Crown
strap
post
Brow pad
