PREPARING THE C420 PAPR FOR USE
5. Install the battery into
t
he battery compart-
ment in the blower
assembly, contact end
(metal ring) first. An ori-
entation label is located
j
ust inside the battery
compartment.
6. Replace the battery cap assembly by threading it
clockwise onto the blower assembly.
AIRFLOW TEST (LESS CARTRIDGES)
Testing the Operation of the Blower Assembly with the
Airflow Indicator
1. Inspect the airflow indi-
cator to verify that the
O-ring is present and in
good condition. The
red ball must move
freely within the col-
umn.
2. Remove the green seal plugs from the outlet and car-
tridge mounting ports of the blower assembly. Do not
discard the plugs. The plugs will be used when storing
the C420 PAPR.
3. Insert the airflow indi-
cator into the blower
assembly air outlet.
Push the airflow indica-
tor into the air outlet
until it bottoms out on
the shoulder.
4. Position the blower assembly in an upright position so
the airflow indicator is vertical on top of the blower
assembly.
5. Turn the blower to the “ON” position to verify opera-
tion.
6. Support the blower assembly on a horizontal surface
so that the airflow indicator is approximately vertical.
7. Observe the reading on
t
he airflow indicator.
With the blower
assembly running and
no cartridges installed,
the red ball will rise to
t
he top of the airflow
indicator.
8. Turn the blower to the “OFF” position.
9. Remove the airflow indicator
INSTALLING/REPLACING THE CARTRIDGES
• Know the contaminant(s) in the environment before
entering. Always check that the filter cartridges are
appropriate for use in the environment. A filter car-
tridge which is not designed for the contaminant
present may not provide protection.
• Two new MSA cartridges of the same type must be
installed before each use.
• DO NOT reuse cartridges. Cartridges are intended
for one time use only.
Failure to follow this warning can result in serious per-
sonal injury or death.
Note: The C420 PAPR must be used with two MSA car-
tridges of the same type. Refer to the NIOSH Approval
Label for approval information.
After verifying that the cartridge type is appropriate for
use in the environment:
1. Verify shelf life expiration date on carton, bag, and
canister/cartridge(s) label has not been exceeded.
DO NOT use an expired cartridge.
DO NOT use the canister/cartridge if the bag is
opened, damaged, or missing. The cartridge must be
in its original packaging prior to use in a contaminated
environment. Do not reuse the cartridge.
Failure to follow this warning can result in serious per-
sonal injury or death.
2. Remove cartridges from the packaging.
3. Inspect the cartridges to be sure that it is not dam-
aged.
4. Remove the green protective plugs from the blower
assembly cartridge inlets and outlet. Do not discard
10
TAL 706 (L) Rev. 2 - 10072074
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