Donning the Blo
w
er/Lo
w Battery Alarm
8
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 apporpriate blower unit. One or two battery
packs may be used (See instructions and warning on page 4). 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 PA3BU/PA3ISBU Blower
Unit.
For Hoods:
Insert the PA1BT Breathing Tube approximately 5 inches into the
air entry sleeve at the rear of the hood being used
(see Figure 7)
.
Install nylon clamp S18051 over air entry sleeve and breathing
tube, inserting clamp locks through two holes in plastic anchor
plate that is sewn into hood (RT Hoods DO NOT have a plastic
anchor plate.).
Engage clamp locks and squeeze together until tight.
For Loose Fitting Facepieces:
If the loose fitting facepiece hood is being used, insert the bayonet
connector of the PA20LFBT Breathing Tube into the hood connector
and turn clockwise until it locks in place
(see Figure 8)
.
For All Headpieces:
Attach the other end of breathing tube to blower unit by screwing
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.
PA3BU/PA3ISBU Low Voltage Alarm
Both the PA3BU and PA3ISBU Blower units are equipped with a
Low Voltage Alarm. This device will activate if the battery voltage
is below acceptable levels. The PA3BU Low Voltage Alarm is an
electronic 77 dba beep. The PA3ISBU Low Voltage Alarm is a
mechanical pulsing of the blower. In either case, the alarm is
internal to the blower and the sound will be carried up the
breathing tube into the hood. Sounding of the alarm indicates that
insufficient airflow may be imminent. The user should immediately
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), and/or the
filter/cartridge should be replaced.
The PA3BU/PA3ISBU Low Voltage Alarm must not be solely 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, as
required by NIOSH.
NOTE
The PA3BU/PA3ISBU blower is 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
Voltage Alarm sounds and the filter cartridges are 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 cartridges may need to be changed.
The use of any cartridge not approved with the
PA3BU/PA3ISBU blower units may put the user at risk and
could result in death or serious injury.
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 PA3BU/PA3ISBU voltage
Alarm should sound, or if the user experiences any difficulty in
breathing, or senses any taste or any odors from the hazard, the
user should leave the hazardous area immediately. Failure to
observe these warnings could result in death or serious injury.
WARNING
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Figure 7
Figure 8
