MSA C420 User manual

The warranties made by MSA with respect to the product are voided if the product is
not used and serviced according to the instructions in this manual. For any additional
information relative to use or repair, write or call 1-800-MSA-2222 during regular
working hours.
See separate insert for NIOSH Approval Information.
P/N 10071373 (PAPR), P/N 10080165 (PAPR/CBRN)
C 20
Powered Air-
Purifying Respirator
Industrial Application
CBRN Application
TAL 706 (L) Rev. 2 © MSA 2007 Prnt. Spec. 10000005389(A) Mat. 10072074
Doc. 10072074
THIS MANUAL INCLUDING THE WARNINGS AND CAUTIONS INSIDE, MUST BE READ
AND FOLLOWED CAREFULLY BY ALL PERSONS WHO HAVE, OR WILL HAVE, THE
RESPONSIBILITY FOR USING OR SERVICING THE PRODUCT. These respirators will per-
form as designed only if they are used and serviced according to the instructions.
OTHERWISE, THEY COULD FAIL TO PERFORM AS DESIGNED, AND PERSONS WHO
RELY ON THESE RESPIRATORS COULD SUSTAIN SERIOUS PERSONAL INJURY OR
DEATH.
INSTRUCTIONS

INTRODUCTION
NIOSH APPROVAL INFORMATION
CAUTIONS AND LIMITATIONS
A - Not for use in atmospheres containing less than 19.5
percent oxygen.
B - Not for use in atmospheres immediately dangerous to
life or health.
C - Do not exceed maximum use concentrations estab-
lished by regulatory standards.
F- Do not use powered air-purifying respirators if airflow
is less than four cfm (115 lpm) for tight fitting face-
pieces or six cfm (170 lpm) for hoods and/or helmets.
H - Follow established cartridge and canister change
schedules or observe ESLI to ensure that cartridges
and canisters are replaced before breakthrough
occurs.
I – Contains electrical parts that may cause an ignition in
flammable or explosive atmospheres.
J - Failure to properly use and maintain this product could
result in injury or death.
L - Follow the manufacturer's User's Instructions for
changing cartridges and/or filters.
M -All approved respirators shall be selected fitted used
and maintained in accordance with MSHA OSHA and
other applicable regulations.
N - Never substitute modify add or omit parts. Use only
exact replacement parts in the configuration as speci-
fied by the manufacturer.
O - Refer to User's Instructions and/or maintenance man-
uals for information on use and maintenance of these
respirators.
P - NIOSH does not evaluate respirators for use as surgi-
cal masks.
S – Special or critical User’s Instructions and/or specific
use limitation may apply. Refer to the User’s
Instructions before donning.
PAPR/CBRN APPLICATION
A- Not for use in atmospheres containing less than 19.5
percent oxygen.
F- Do not use powered air-purifying respirators if air flow
is less than four cfm (115 lpm) for tight fitting face-
pieces or six cfm (170 lpm) for hoods and/or helmets.
H- Follow established cartridge and cartridge change
schedules or observe ESLI to ensure cartridges and
canisters are replaced before breakthrough occurs.
I- Contains electrical parts that may cause an ignition
source in flammable or explosive atmospheres.
J- Failure to properly use and maintain this product
could result in injury or death.
L- Follow the manufacturer's User's Instructions for
changing canisters.
M- All approved respirators shall be selected fitted
used and maintained in accordance with MSHA
OSHA and other applicable regulations.
N- Never substitute modify add or omit parts. Use only
exact replacement parts in the configuration as spec-
ified by the manufacturer.
O- Refer to User's Instructions and/or maintenance
manuals for information on use and maintenance of
these respirators.
R- Some CBRN agents may not present immediate
effects from exposure but can result in delayed
impairment illness and death.
S- Special or critical User’s Instructions and/or specific
use limitations apply. Refer to User’s Instructions
before donning.
T- Direct contact with CBRN agents requires proper
handling of the respirator after each use and between
multiple entries during the same use.
Decontamination and disposal procedures must be
followed. If contaminated with liquid chemical warfare
agents dispose of the respirator after decontamina-
tion.
Y- This respirator provides respiratory protection against
inhalation of radiological and nuclear dust particles.
2
TAL 706 (L) Rev. 2 - 10072074
TABLE OF CONTENTS
GeneralDescription ................................................................................7
LimitationsofUse .................................................................................7
PreparingtheC420PAPRForUse ....................................................................9
FlowTest .......................................................................................10
DonningandUse .................................................................................13
NegativePressureLeakTest ........................................................................13
RemovingtheRespirator ...........................................................................15
CleaningandInspection............................................................................17
Storage.........................................................................................19
ChargingtheC420RechargeableBattery ..............................................................21
CartridgeandBatteryDisposal ......................................................................23
Recertification....................................................................................25

INTRODUCTION
Procedures for monitoring radiation exposure and
full radiation protection must be followed.
Z- If during use and unexpected hazard is encountered
such as a secondary CBRN device; pockets of
entrapped hazard or any unforeseen hazard immedi-
ately leave the area for clean air.
BB- Not for use in entry into atmospheres immediately
dangerous to life or health.
CC- For entry do not exceed maximum use concentra-
tions established by regulatory standards.
GG- Direct contact with CBRN agents requires proper
handling of the respirator after use. Correct disposal
procedures must be followed.
QQ- Use in conjunction with personal protective ensem-
bles that provide appropriate levels of protection
against dermal hazard. Failure to do so may result in
personal injury even when the respirator is fitted
properly used and maintained.
UU- The respirator should not be used beyond eight (8)
hours after initial exposure to chemical warfare
agents to avoid the possibility of agent permeation. If
liquid exposure is encountered the respirator should
not be used for more than two (2) hours.
VV- PAPRS with TC-23C approvals may NOT be used for
escape from IDLH atmospheres.
S – SPECIAL OR CRITICAL USER’S INSTRUCTIONS
During use of the C420 PAPR the atmosphere must be
monitored for the level of contamination and a means of
escape must be provided in the event that the contamina-
tion level increases to immediately dangerous to life and
health (IDLH) levels.
The C420 PAPR must be properly inspected before use
properly decontaminated if necessary after use properly
cleaned and maintained after use and properly stored
between uses.
The C420 PAPR contains a battery and may not be taken
into or used in atmospheres containing flammable or
explosive gases vapors or dusts when the concentration
of such contaminants is near or above the lower flamma-
ble limit (LFL).
Do not use the C420 PAPR for firefighting in oxygen-defi-
cient atmospheres or for protection against airborne con-
taminants from which the cartridge does not protect.
3TAL 706 (L) Rev. 2 - 10072074

NOTES
4
TAL 706 (L) Rev. 2 - 10072074

INSTRUCTIONS FOR USE AND CARE
CBRN Application
•This respirator provi es LIMITED protection. It is
NIOSH approve for respiratory protection against
atmospheres containing CBRN (chemical, biologi-
cal, ra iological, an nuclear) warfare agents; how-
ever, it cannot protect against all possible warfare
agents.
• Some CBRN agents may not present imme iate
effects from exposure, but can result in elaye
impairment, illness, or eath.
• DO NOT use without a complete un erstan ing of
the instructions an limitations for this respirator
an proper training. Misuse can prevent the respi-
rator from provi ing the necessary protection.
• CBRN agents may NOT be etectable by smell or
sight. Don respirator before entering an area sus-
pecte of containing CBRN agent. Follow proce-
ures establishe by proper authorities.
• DO NOT use this respirator beyon eight (8) hours
after initial use in an atmosphere containing CBRN
agents or beyon two (2) hours after initial use in
an atmosphere containing CBRN agents in liqui of
mist form; otherwise agent permeation may occur.
• DO NOT remove respirator until respirator an
clothing are econtaminate ; otherwise exposure
to CBRN agent may result. Follow econtamination
an isposal proce ures establishe by appropri-
ate authorities.
1. An a equate respiratory protection program must
inclu e knowle ge of hazar s, hazar assessment,
selection of proper respiratory protective equip-
ment, instruction an training in the use of equip-
ment, inspection an maintenance of equipment,
an me ical surveillance.
2. This respirator will perform as esigne only if
use an maintaine accor ing to the manufactur-
er's instructions. The Program A ministrator an
the users must rea an un erstan these instruc-
tions before using or servicing this pro uct.
3. If the respirator oes not perform as specifie in
this manual, it must not be use until it has been
checke by authorize personnel.
4. DO NOT alter, mo ify, or substitute any compo-
nents.
5. Inspect the respirator regularly an maintain it
accor ing to the instructions. Repairs must only be
ma e by properly traine personnel.
6. This respiratory protective evice oes not supply
oxygen. Use only in a equately ventilate areas
which conform to the appropriate stan ar .
7. This respirator must be use in conjunction with
the proper cartri ges for protection against specif-
ic contaminants. If you cannot etermine that the
cartri ges use with this evice is esigne for the
contaminant, or if you o not know the i entity of
the contaminant, o not use this evice.
8. DO NOT use when concentrations of contaminants
are unknown.
9. DO NOT block the cartri ges.
10. DO NOT use when appropriate exposure limit (PEL,
REL, TLV, etc.) is not known.
11. Leave the contaminate area imme iately if:
a. Breathing becomes ifficult
b.Dizziness or other istress occurs
c. You taste or smell the contaminant
.You experience nose or throat irritation
e. Instructe by responsible in ivi uals
11. Use strictly in accor ance with the instructions,
labels, an limitations pertaining to this evice.
Follow an establishe canister/cartri ge(s)
changeout sche ule.
12. This respirator may not provi e a satisfactory seal
with certain facial characteristics, such as bear s
or large si eburns that prevent irect contact
between the skin an the sealing surface of the
facepiece. Do not use this facepiece if such con i-
tions exist.
13. DO NOT wear eyeglasses un er the facepiece. The
temples or si ebars on eyeglasses will prevent an
air-tight seal. If you must wear glasses, install the
spectacle kit.
14. The user must perform a respirator fit test
(Quantitative Test or Qualitative Test) an follow all
warnings an limitations specifie .
15. Wear impermeable protective clothing to prevent
exposure to gases an vapors which can poison by
skin absorption.
16. DO NOT use this respiratory protective evice in
explosive atmospheres.
17. DO NOT use for urethane paints or other paints
containing iisocyanates unless an appropriate
cartri ge change-out sche ule is evelope . Due
to their poor warning properties, over exposure
can occur without user awareness an result in
severe permanent amage to the respiratory sys-
tem. If unable to evelop an appropriate change-
out sche ule, use an air-supplie respirator or
SCBA.
18. The C420 PAPR has no user-serviceable parts
except as instructe in this manual.
19. DO NOT rop the C420 PAPR. If the C420 PAPR is
roppe leave the contaminate area imme iately
an inspect the unit for amage. If the plastic car-
tri ge or blower housing is cracke it may cause
contaminants to get into the system.
Failure to follow all warnings, instructions, an estab-
lishe protective measures can result in serious per-
sonal injury or eath.
5TAL 706 (L) Rev. 2 - 10072074

INSTRUCTIONS FOR USE AND CARE
The C420 PAPR must be properly prepared for use flow
tested properly donned and a negative pressure leak test
must be conducted in an area known to be free of conta-
minants before it can be used.
Before entry into a contaminated area the maximum safe
duration of use must be estimated. The maximum safe
duration of use depends primarily on:
•The amount and type of contamination in the air and
the capacity of the cartridge to absorb or neutralize
that contaminant.
• The amount of airborne particles (dust) in the atmos-
phere.
• The charge contained in the battery.
• The physiological limits of the respirator user.
The maximum expected cartridge life shall be predeter-
mined based on a determination of the amount of conta-
minant in the atmosphere and the capacity of the car-
tridges together with the expected air flow through the
cartridges. An average airflow of approximately two cubic
feet per minute (2 CFM) will flow through each cartridge
during prolonged use.
The single use battery may be used up to eight (8) hours
under certain conditions. The rechargeable battery may
be used for up to four (4) hours under certain conditions.
Air flow must be checked as described in these instruc-
tions for maximum protection.
After four (4) hours of use the user must leave the conta-
minated area decontaminate if required and check the
airflow with the Airflow Indicator (Refer to the Flow Test
with Cartridges Installed section) when using the single
use battery. Thereafter the air flow must be checked at
least every two (2) hours of use. (Refer to the In-Use Flow
Test section) After four (4) hours of use the user must
leave the contaminated area decontaminate if required
and discontinue using the respirator when using the
rechargeable battery.
6
TAL 706 (L) Rev. 2 - 10072074

GENERAL DESCRIPTION
DESCRIPTION
The C420 Respirator is a blower-assisted air-purifying
respirator referred to as a Powered Air-Purifying
Respirator or a PAPR.
The filtering system consists of a waist-mounted battery-
driven blower assembly device and two (2) cartridge-type
filter media. The blower assembly contains an electric
motor driving an air blower. A compartment for a non-
rechargeable 6 volt (nominal) lithium-sulfur dioxide (LI-
SO2) battery pack or a rechargeable 4.8 volt (nominal)
nickel-metal hydride (NiMH) battery pack is located on the
bottom of the blower assembly. There are two (2) thread-
ed inlets on the front of the blower assembly for the
attachment of the cartridges (sold separately). The user of
the respirator breathes ambient air after the air has
passed through the cartridges. The cartridges include a
mechanical filter to trap airborne particles and may also
include a sorbent bed of impregnated activated carbon to
trap and/or neutralize various gases/vapors.
The blower assembly assists breathing by drawing air
through the cartridges and delivering the purified air
through a breathing tube to the facepiece. An airflow indi-
cator (P/N S-30020) used to check for minimum airflow is
provided with the C420 PAPR filtering system. To maintain
respiratory protection:
• The user must be properly fit tested to the respirator
facepiece before use (refer to the appropriate
Facepiece User Instructions Manual)
• The blower with cartridges installed must be tested
with the airflow indicator both prior to use and at pre-
scribed intervals during use to monitor battery life and
cartridge efficiency.
The C420 PAPR can be used with MSA Millennium®
Facepiece and Ultra Elite®Facepiece. Refer to the sepa-
rate NIOSH Approval Labels (P/N 10071373 and
10080165) for a complete list of approved part numbers
and limitations.
RESPIRATOR USE LIMITATIONS
The respirator must not be worn in atmospheres which
exceed any of the following limitations:
1. Maximum use concentrations
a. Full facepiece and hood PAPRs: 1000 times the
exposure limit for the contaminants present.
b.Half-facepiece PAPRs: 50 times the exposure limit
for the contaminants present.
c. 1000 parts per million organic vapors (for organic
vapor respirators).
2. The limitations outlined in the applicable NIOSH
approval.
3. Any applicable limitation contained in a standard
established by a regulatory agency (such as OSHA)
with jurisdiction over the wearer.
4. This respirator can be used for protection against a
mixture of contaminants that are present simultane-
ously or alternately against one contaminant then
another (using the same cartridges or filters) if the
mixture meets the following conditions:
a. The cartridge/canister/filter must be approved for all
contaminants present.
b.Particulates (dusts mists fumes asbestos
radionuclides) can be mixed with any other particu-
late or any gas or vapor for which the cartridge/can-
ister is approved.
c. Contaminants present simultaneously must be below
IDLH levels for the specific contaminants. If any one
contaminant in the mixture exceeds the IDLH con-
centration then the entire mixture must be treated as
IDLH and the respirator cannot be used (except for
escape from particulates with appropriate filter).”
EXPOSURE LIMITS
A listing of acceptable exposure limits from the following
sources is provided in MSA’s Response® Respirator
Selector:
- American Conference of Governmental Industrial
Hygienists (ACGIH)
- Occupational Safety and Health Administration
(OSHA)
- National Institute for Occupational Safety and Health
(NIOSH)
- American Industrial Hygiene Association (AIHA)
Contact MSA at 1-800-MSA-2222 for information.
Exposure Limits for Mixtures
The American Conference of Governmental Industrial
Hygienists (ACGIH) publishes the following information to
determine the TLV of a mixture.
First determine the total concentration of the chemical
mixture (CMixture) from the individual contaminant con-
centrations (C1C2C3. . . ) using the following formula:
CMixture=C1+C2+ C3+ . . .
The TLV of the mixture is found by using the following for-
mula where T1T2T3. . . are the individual contaminant
TLVs and C1C2C3. . . are the individual contaminant
concentrations:
Only use these equations if the contaminants present are
actually mixed. Some substances do not mix and may be
present separately for example in pockets or at different
levels. In that case the lowest TLV of the substances pre-
sent must be used to determine the appropriate respirator
category for protection against all contaminants present.
7TAL 706 (L) Rev. 2 - 10072074
TMixture=CMixture
+ + + . . .
T1T2T3
C1C2C3

GENERAL DESCRIPTION
See MSA’s Response Respirator Selector for additional
information.
Technical Information
Airflow: When used with the MSA battery packs the C420
PAPR provides a constant filtered airflow of a minimum of
115 l/m to the facepiece.
Battery Packs: Non-rechargeable 6 volt (nominal) lithium-
sulfur dioxide (LI-SO2) battery pack or a rechargeable 4.8
volt (nominal) nickel-metal hydride (NiMH) battery pack.
Weight: Blower assembly with battery pack and two car-
tridges (approximately 4lbs).
Contents
The C420 PAPR filtering system kit is shipped with the
components listed.
Note: Upon receipt of PAPR kit inspect the contents for
shipping damage and ensure all components are present.
• C420 PAPR Blower Assembly
•Breathing Tube Assembly
• Decon Belt Assembly
• LI-SO2 Single Use Battery Pack
• Airflow Indicator
• User’s Instruction Manual (with NIOSH Approval
Information)
8
TAL 706 (L) Rev. 2 - 10072074

PREPARING THE C420 PAPR FOR USE
CHECKPOINTS BEFORE USE
1. Check that all parts of the respirator are complete and
undamaged. See the Inspection section for inspection
procedures.
2. Check that the cartridge or canister approval is appro-
priate and effective against the contaminant in the use
environment. Always use two MSA cartridges or can-
isters of the same type.
DO NOT cross threa any C420 PAPR components
uring assembly. Cross threa ing can cause the con-
nection to feel tight, but a sufficient seal woul not be
achieve . Failure to follow this warning can result in
serious personal injury or eath.
INSTALLING THE WAISTBELT
1. Note the lacing path of the belt through the male
buckle.
2. Remove the male buckle and keeper loop from the
end of the belt.
3. Thread the belt through the two belt loops on the back
of the blower assembly.
4. Replace the keeper loop and lace the male buckle
back onto the belt.
Note: Ensure the belt is properly tightened so that the
C420 PAPR blower does not fall off or slide down the
body during use.
INSTALLING THE BATTERY PACK
Note: Each battery cap assembly has a retaining lanyard
to prevent loss.
Lithium-Sulfur Dioxi e (LI-SO2) Battery Pack
When powering the blower assembly with the LI-SO2
Battery Pack use the black battery cap assembly sup-
plied with the C420 PAPR blower assembly.
Nickel-Metal Hy ri e Battery Pack
Note: Before initial battery pack use or if battery pack
has not been used for an extended period of time (several
months) perform (3) 6-hour charge/4-hour discharge
cycles for optimum battery performance. The discharge
cycles should be completed with the blower running in a
non-hazardous environment with no breathing tube or
cartridges attached to the blower.
Note: See the Charging the C240 Rechargeable Battery
section for detailed battery charger use instructions.
When powering the blower assembly with the NiMH
Battery Pack use the green battery cap assembly sup-
plied with the NiMH Battery Pack.
DO NOT completely ischarge a rechargeable battery.
Rechargeable batteries must not be use for more
than four (4) hours at a time. Failure to follow this cau-
tion can result in re uce airflow an can cause the
battery to be permanently amage .
Installing the Green Battery Cap Assembly (for NiMH
Battery Packs only)
1. Remove the black battery cap assembly by turning it
counter-clockwise.
2. Feed the split ring on the retaining lanyard through the
securing hole on the C420 PAPR blower housing.
3. Retain the black cap assembly for possible future use
with LI-SO2 Battery Packs.
4. Attach the green battery cap assembly by feeding the
split ring on the retaining lanyard completely through
the securing hole on the C420 PAPR blower housing.
Installing the Battery Pack into the Battery
Compartment of the Blower Assembly
DO NOT use any battery which shows signs of am-
age, such as bulging, swelling, isfigurement, or liqui
in the plastic wrap. Failure to follow this warning can
result in serious personal injury or eath.
1. Ensure the blower switch is in the “OFF” position.
Note: Damage may occur to the battery if the switch is
left in the “ON” position when the battery is installed.
2. Remove the battery cap assembly from the C420
PAPR blower by turning it counter-clockwise.
3. Remove the battery from its packaging.
4. Inspect the battery for signs of damage.
The Lithium-Sulfur Dioxi e (LI-SO2) Battery Pack use
in this equipment contains pressurize Sulfur Dioxi e
(SO2) gas. The gas is toxic an the battery must not
be abuse in any way which may cause the battery to
rupture. DO NOT han le the battery irectly if you
etect an o or like that of vinegar or rotten eggs.
Such o or in icates exposure to battery gas leakage,
which can lea to serious personal injury or eath.
9TAL 706 (L) Rev. 2 - 10072074

PREPARING THE C420 PAPR FOR USE
5. Install the battery into
the battery compart-
ment in the blower
assembly contact end
(metal ring) first. An ori-
entation label is located
just 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 In icator
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
the airflow indicator.
With the blower
assembly running and
no cartridges installed
the red ball will rise to
the 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 cartri ges are
appropriate for use in the environment. A filter car-
tri ge which is not esigne for the contaminant
present may not provi e protection.
• Two new MSA cartri ges of the same type must be
installe before each use.
• DO NOT reuse cartri ges. Cartri ges are inten e
for one time use only.
Failure to follow this warning can result in serious per-
sonal injury or eath.
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 expire cartri ge.
DO NOT use the canister/cartri ge if the bag is
opene , amage , or missing. The cartri ge must be
in its original packaging prior to use in a contaminate
environment. Do not reuse the cartri ge.
Failure to follow this warning can result in serious per-
sonal injury or eath.
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

PREPARING THE C420 PAPR FOR USE
the plugs. The plugs will be used when storing the
C420 PAPR.
5. Inspect the gray gas-
kets in each of the car-
tridge ports. If either
gasket 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 amage or missing. Failure to follow this
warning can result in serious personal injury or eath.
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 cartri ges. Over-tightening
may istort the gasket resulting in leakage that may
expose the user to substances resulting in serious
personal injury or eath.
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 cartri ges in a contaminate area.
Be sure to follow applicable econtamination pro-
ce ures
• If the respirator oes not perform as specifie , it
must not be use until it has been checke by
authorize personnel.
• Return to a non-contaminate area imme iately if
you experience unusual sensations (nausea, izzi-
ness, eye irritation, unusual o or or taste, exces-
sive fatigue, or ifficulty breathing).
Failure to follow this warning can result in serious per-
sonal injury or eath.
AIRFLOW TEST (WITH CARTRIDGES INSTALLED)
Failure to verify proper airflow from the blower assem-
bly may result in re uce performance of the unit,
resulting in serious personal injury or eath.
Con ucting 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

PREPARING THE C420 PAPR FOR USE
2. Inspect the gray gasket
in the breathing tube
inlet. If gasket is dam-
aged or missing
replace the gasket (P/N
B-10022-001).
3. Attach the breathing
tube inlet to the blower
outlet connection and
snugly hand-tighten.
Attaching the Breathing Tube Assembly to the
Facepiece
1. Remove the green plug from the breathing tube outlet.
Do not discard the plug. The plug will be used when
storing the breathing tube.
2. Attach the breathing tube outlet to the facepiece inlet
connection and snugly hand-tighten using the hand-
wheel.
The han wheel on the breathing tube must rotate eas-
ily. If ebris has stoppe the han wheel from rotating
easily, the faceseal coul leak if the breathing tube
gets move while on the user’s face. Failure to follow
this warning can result in serious personal injury or
eath.
The C420 PAPR is now ready for use. The user must fol-
low the donning procedures before actual use of the res-
pirator.
12
TAL 706 (L) Rev. 2 - 10072074

DONNING AND USE
DONNING
Note: Refer to the facepiece user instructions for face-
piece donning instructions.
• Donning, offing, an obtaining an checking for a
proper facepiece seal must be one in an area
known to be free of contaminants. The user must
have practice this proce ure before attempting to
use the respirator for respiratory protection.
• When wearing an Ultra Elite Facepiece, ensure the
breathing tube connection is parallel to the user’s
shoul ers.
• When wearing a Millennium Facepiece, ensure that
the breathing tube goes aroun the bo y on the
same si e as it is connecte to the facepiece
breathing tube inlet.
Failure to follow this warning can result in serious per-
sonal injury or eath.
Donning the Blower Assembly
1. Examine the breathing tube assembly to verify that it
is properly tightened to both the facepiece and the
blower assembly.
2. Examine the cartridges to verify that they are properly
installed to the blower assembly.
3. Turn the switch to the “ON” position to confirm that
the battery is installed and the blower assembly is
working.
4. Turn the switch to the “OFF” position.
5. Don the waistbelt with the blower assembly with the
C420 PAPR blower outlet located at the top of the
unit.
6. Fasten the buckle and
adjust the waistbelt.
The C420 PAPR blower may be worn in multiple positions
on the waist. When the respirator is donned ensure:
• that the breathing tube is not excessively tight. During
use there should be no movements that can cause the
breathing tube to become tight and pull the facepiece
away from the face which could break the facepiece
seal.
• that the breathing tube is not excessively loose.
During use there should not be enough slack in the
breathing tube such that it could get caught on some-
thing and pull the facepiece away from the face which
could break the facepiece seal.
If either one of these conditions is present one of the fol-
lowing actions must be taken:
• change the position of the blower on the waist to cre-
ate or remove slack in the breathing tube.
• use a different length breathing tube to create or
remove slack in the breathing tube.
Note: The C420 PAPR may be used with either a standard
(PN S-30116) or a long (PN S-30118) breathing tube.
Note: Use a buddy if the situation permits to ensure that
the C420 PAPR is donned correctly (the head harness is
in place the blower is positioned correctly the waist belt
is secure and all components are properly assembled
and tightened).
NEGATIVE PRESSURE SEAL TEST
The Negative Pressure Seal Test must be performed each
time the facepiece is donned. A good face-to-facepiece
seal must be verified before entering a hazardous area.
Perform the test as follows:
1. Ensure respirator is assembled properly.
2. Close off the inlet side of both cartridges by placing
palms of the hands over cartridge inlets and press
firmly to seal inlets.
3. Inhale gently and hold breath for 10 seconds. If the
seal is good the facepiece will collapse and remain
collapsed against face. Remove hands and breathe
normally.
4. If the facepiece did not remain collapsed during the
test or any leakage is noticed check each cartridge
or breathing tube connection for looseness or cross
threading. Perform Negative Pressure Seal Test again.
5. If this does not correct the leak the facepiece will not
provide protection. If the leakage is from the face seal
a different size mask may be tried. If other than face
seal leakage is detected the cause of the leak must
be corrected before performing another test.
Note: Protective clothing and headwear if used must be
arranged so that it does not interfere with the fit of the
facepiece or restrict airflow to the cartridges.
This evice may not seal properly with your face if you
have a bear , gross si eburns or similar physical
characteristics (see ANSI Z88.2). An improper facial
seal may allow contaminants to leak into the face-
piece, re ucing or eliminating respiratory protection.
Do not use this evice if such con itions exist. The
negative pressure seal test must be con ucte an
passe before each use. Never remove the facepiece
13 TAL 706 (L) Rev. 2 - 10072074

DONNING AND USE
except in a safe, non-hazar ous, non-toxic atmos-
phere. Failure to follow this warning can result in seri-
ous personal injury or eath.
USING THE C420 PAPR
Once the user has properly donned the respirator the
blower should be turned on and the hazardous atmos-
phere may be entered.
Imme iately leave the contaminate area if the air-
borne contaminant is etecte by o or, taste, eye irri-
tation, or if any iscomfort is felt uring use. Failure to
follow this warning can result in serious personal
injury or eath.
If air flow is noticeably ecrease or stops completely,
leave the contaminate area imme iately. Failure to
follow this warning can result in serious personal
injury or eath.
If the battery compartment becomes hot to the touch,
leave the contaminate area an turn the switch to
the “OFF” position imme iately, econtaminate if nec-
essary, an check the respirator. Failure to follow this
warning can result in serious personal injury or eath.
IN-USE FLOW TEST
When to Con uct an In-Use Flow Test
1. If at any time the user leaves the contaminated area
perform an in use flow test and negative pressure seal
test before reentering the contaminated area.
2. If using a single use LI-SO2 battery conduct an in-use
flow test after four (4) hours of use and again two (2)
hours later after six (6) hours of use.
Con ucting an In-Use Flow Test
Note: The user must leave the contaminated area and if
necessary be decontaminated.
1. Remove the breathing tube from the blower.
2. Install the airflow indicator (Refer to the Air Flow Test
with Cartridges Installed section).
3. Turn the blower assem-
bly switch to the “ON”
position. Ensure the
red ball rises above the
line on the air flow indi-
cator.
DO NOT use the respirator if the re ball oes not rise
completely above the line on the air flow in icator.
Failure to follow this warning can result in serious per-
sonal injury or eath.
a. If the red ball does not rise completely above the
line on the air flow indicator:
• Replace the battery and recheck airflow
• Reseat the canisters and recheck airflow.
b. If the red ball still DOES NOT rise completely above
the line on the air flow indicator remove the respira-
tor from service.
Note: If after obtaining an acceptable flow test the user
intends to reenter the contaminated area a successful
negative pressure seal test must be performed (Refer to
the Donning section).
14
TAL 706 (L) Rev. 2 - 10072074

REMOVING THE RESPIRATOR
DECONTAMINATION
DO NOT remove respirator until respirator an protec-
tive clothing are econtaminate ; otherwise, exposure
to contaminants may result. Follow econtamination
an isposal proce ures establishe by appropriate
authorities. Failure to follow this warning may result in
serious personal injury or eath.
Once the protective equipment has been decontaminated
proper disposal of affected equipment must be per-
formed. Disposal is to be performed as required by feder-
al state and/or local laws.
When conditions are safe to remove and handle the respi-
rator the switch can be moved to the “OFF” position and
accessories/components (belt cartridges etc) can be
removed. Refer to the facepiece user’s instruction manual.
DO NOT reuse the cartri ges. Cartri ges are consi -
ere to be in service when they are remove from
their packaging. Cartri ges are inten e for one time
use only an must be ispose of upon termination of
use.
1. Open the battery compartment by unthreading
(counter-clockwise) the battery cap assembly.
2. Remove the battery.
a. The non-rechargeable LI-SO2 battery must be dis-
posed of on termination of use. Do not reuse the
battery.
b.The rechargeable battery can be charged according
to the instructions on the battery label in the
Charging the C420 Rechareable Battery section of
these User Instructions.
The rechargeable battery can only be charge using
the MSA battery charger. Failure to follow this warning
can result in serious personal injury or eath.
DO NOT ispose of batteries as or inary trash. Follow
the instructions inclu e in the Disposal of Cartri ges
an Batteries section.
3. Clean inspect and prepare the C420 PAPR for the
next use.
15 TAL 706 (L) Rev. 2 - 10072074

NOTES
16
TAL 706 (L) Rev. 2 - 10072074

CLEANING AND INSPECTION
CLEANING AND DISINFECTING
All components (facepiece breathing tube motor-blower
battery pack and waistbelt) must be thoroughly cleaned
after each use. Clean the respirator after each use with
Confidence Plus® Cleaner (P/N 10009971) from MSA.
Refer to the label for use instructions. A solution as effec-
tive as Confidence Plus Cleaning Solution and compatible
with MSA respirator components may be substituted.
Be careful that you o not breathe or touch the conta-
minant in han ling the respirator or its parts. Use
equipment esigne to protect you from the specific
contaminant. If necessary, ispose of equipment to
protect yourself from the contaminant. Failure to fol-
low this warning can result in serious personal injury
or eath.
Note: The used cartridges and LI-SO2 battery must be
removed from the respirator and disposed of as directed
in the Disposal of Battery and Cartridges section.
1. Preparing the cleaner:
a. Follow the instructions with the Confidence Plus
Cleaning Solution.
b.If the Confidence Plus Cleaning Solution is not
used prepare in accordance with the instructions
provided with cleaning products.
2. Disconnect the breathing tube from the facepiece.
3. Clean and disinfect the facepiece. Refer to the face-
piece user’s instruction:
4. Separate the motor-blower breathing tube waistbelt
and filter or chemical cartridges.
5. Inspect the equipment for worn inlet gaskets dam-
aged threads cracked plastic components rubber
parts worn or frayed belts or other damaged compo-
nents. Make note of any damaged components and
replace before storage.
6. Use a damp cloth or sponge saturated with
Confidence Plus or equivalent cleaning solution to
wipe the breathing tube and motor-blower clean.
7. Carefully clean the breathing tube connection and car-
tridge ports to remove deposits that could prevent an
airtight seal.
DO NOT submerge the blower assembly. If acci ental
submersion occurs, the blower assembly must be
allowe to air ry thoroughly an then teste with the
Airflow In icator to verify that the motor was not am-
age . Failure to follow this warning can result in seri-
ous personal injury or eath.
8. Thoroughly wash and rinse the support belt in the
Confidence Plus or equivalent cleaning solution. A soft
brush or sponge may be used.
9. Re-assemble the respirator so that it will be ready for
use.
INSPECTION
1. Examine all hardware to ensure proper condition of
threads couplings and adapters.
2. Examine all gaskets and seals and ensure that they
are present and in good condition.
3. Examine the blower assembly and breathing tube
assembly for damage or cracks. Ensure that there are
no loose objects rattling inside the blower assembly.
4. Correct any deficiencies immediately or tag the respi-
rator as in need of repair and remove it from service.
5. Ensure that the unit is working properly before stor-
age.
17 TAL 706 (L) Rev. 2 - 10072074

NOTES
18
TAL 706 (L) Rev. 2 - 10072074

STORAGE
STORAGE
• Ensure that the unit is working properly before
storage by temporarily installing a battery an
check the airflow as instructe in the Before Use
section. Remove the battery after testing.
•DO NOT store the unit with the battery installe .
Always remove the battery from the blower assem-
bly for storage. Store the battery an the blower
assembly away from sunlight, heat, or moisture.
Storing the Respirator
• Install the green seal plugs over the outlet and into the
cartridge mounting ports of the blower assembly.
• Install the green seal
plugs over the outlet
and into the blower inlet
of the breathing tube
assembly.
• Store only undamaged respirators and breathing tubes
for further use. When not in use store the respirator in
cool dry and clean ambient air.
Storage for CBRN Application Only
Cartridges must be stored in ONE of the configurations
listed:
• Cartridges must be stored in original unopened foil
bag and in the extended clamshell (P/N 10046578) or
• Cartridges must be stored in original unopened foil
bag and in the original unopened carton.
The facepiece must be stored in an extended clamshell
(P/N 10046578). The clamshell is provided as a conve-
nient storage container to protect the facepiece and one
cartridge. Replace the clamshell if it becomes damaged.
Storing the batteries
• Store the batteries in normal conditions (room temper-
ature/50% relative humidity/away from direct sunlight).
• The LI-SO2 battery is designed for extended shelf life
when properly stored. The LI-SO2 battery is not
rechargeable.
• The NiMH battery is rechargeable. Follow the instruc-
tions on the battery label or refer to the Charging the
C420 Rechargeable Battery section of this manual.
• Keep this user’s instruction manual with the complete
respirator.
19 TAL 706 (L) Rev. 2 - 10072074

NOTES
20
TAL 706 (L) Rev. 2 - 10072074