PREPARING THE C420 PAPR FOR USE
the plugs. The plugs will be used when storing the
C
420 PAPR.
5. Inspect the gray gas-
kets in each of the car-
tridge ports. If either
g
asket is damaged or
missing, replace the
gasket(s) (P/N B-
60026-002).
Note: When replacing the gasket(s), take proper care to
ensure that the cartridge inlet port threads are not dam-
aged.
DO NOT use a C420 PAPR blower with one or both of
the gaskets damaged or missing. Failure to follow this
warning can result in serious personal injury or death.
6. Remove both cartridges from their packaging.
7. Inspect the cartridges to be sure that they are not
damaged.
Note: Cartridges are considered to be in service when
they are removed from their packaging. Cartridges are
intended for one time use only.
8. Attach both cartridges
to the blower assembly
by threading them
snugly into the car-
tridge ports, hand-
tight.
DO NOT over-tighten the cartridges. Over-tightening
may distort the gasket resulting in leakage that may
expose the user to substances resulting in serious
personal injury or death.
For CBRN Applications Only
DO NOT use this respirator beyond eight (8) hours after
initial use in an atmosphere containing CBRN agents or
beyond two (2) hours after initial use in an atmosphere
containing CBRN agents in liquid or mist form; otherwise,
agent permeation may occur.
• DO NOT replace cartridges in a contaminated area.
Be sure to follow applicable decontamination pro-
cedures
• If the respirator does not perform as specified, it
m
ust not be used until it has been checked by
authorized personnel.
• Return to a non-contaminated area immediately if
you experience unusual sensations (nausea, dizzi-
ness, eye irritation, unusual odor or taste, exces-
sive fatigue, or difficulty breathing).
Failure to follow this warning can result in serious per-
sonal injury or death.
AIRFLOW TEST (WITH CARTRIDGES INSTALLED)
Failure to verify proper airflow from the blower assem-
bly may result in reduced performance of the unit,
resulting in serious personal injury or death.
Conducting the Airflow Test
1. Inspect the airflow indicator to verify that the O-ring is
present and in good condition. The red ball must
move freely within the column.
2. Position the C420 PAPR blower in the upright position
so the airflow indicator is vertical on top of the C420
PAPR blower assembly.
3. Insert the airflow indicator into the blower assembly air
outlet. Push the airflow indicator into the air outlet until
it bottoms out on the shoulder.
4. Turn the blower assembly to the “ON” position.
5. Support the blower assembly on a horizontal surface
so that the airflow indicator is approximately vertical.
6. Observe the reading on the airflow indicator.
Acceptable performance shall be indicated by the
position of the red ball being above the line marked on
the outside of the column.
Note: With fresh cartridges and a new battery installed,
the red ball should rise nearly to the top of the airflow
indicator.
INSTALLING THE BREATHING TUBE
Attaching the Breathing Tube assembly to the Blower
1. Remove the green plug from the breathing tube inlet.
Do not discard the plug. The plug will be used when
storing the breathing tube.
11
TAL 706 (L) Rev. 2 - 10072074
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