MSA G1 SCBA User manual

Operating Manual
G1 Air-Purifying Respirator (APR)
Full Facepiece Respirator
Order No.: 10158743/08
Print Spec: 10000005389 (F)
CR:800000053916
MSAsafety.com

© MSA 2021, 2022. All rights reserved
WARNING!
Read this manual carefully before using or maintaining the device. The device will perform as designed only if it is used and
maintained in accordance with the manufacturer's instructions. Otherwise, it could fail to perform as designed, and persons
who rely on this device could sustain serious injury or death.
The warranties made by MSA with respect to the product are voided if the product is not installed and used in accordance with
the instructions in this manual. Please protect yourself and your employees by following the instructions.
Please read and observe the WARNINGS and CAUTIONS inside. For additional information relative to use or repair, call
1-800-MSA-2222 during regular working hours.
For alternate languages, refer to part number 10162901.
MSA is a registered trademark of MSA Technology, LLC in the US, Europe and other Countries. For all other trademarks visit
https://us.msasafety.com/Trademarks.
1000 Cranberry Woods Drive
Cranberry Township, PA 16066
USA
1-800-MSA-2222
1-800-967-0398
For your local MSA contacts, please go to our website www.MSAsafety.com

Contents
1 Safety Regulations 5
1.1 NIOSH Approval Information 5
1.2 NIOSH Cautions and Limitations 5
1.3 NIOSH Cautions and Limitations of Use for Chemical, Biological, Radiological, and Nuclear (CBRN)
Applications 6
1.4 Important Notice for Respirator Users and Respiratory Protection Program Administrators 7
1.5 For CBRN Application Only 9
1.6 References 9
1.7 Contact Information 10
1.8 Warranty 10
2 Description 11
2.1 G1 Facepiece 11
2.2 APR/PAPR Adapters 11
2.3 OptimAir TL Powered Air-Purifying Respirator (PAPR) 12
2.4 Air Filtration Cartridges/Canisters 12
2.5 G1 Spectacle Kit 13
3 Size Selection 13
3.1 Respirator Fit Test 13
4 Visual Examinations 14
4.1 All Components 14
4.2 Facepiece 14
4.3 APR Adapter 15
4.4 Air Filtration Cartridge(s)/Canister 15
5 Before Use 15
5.1 Respirator Use Limitations 15
5.2 Exposure Limits 17
5.3 Mixtures of Contaminants 17
5.4 Exposure Limits for Mixtures 17
6 Preparing for Use 18
6.1 Installing the APR/PAPR Adapter (Single and Twin Port) 18
6.2 Installing/Replacing Air Filtration Cartridges/Canisters 19
7 Donning 20
7.1 Donning in Normal Weather 20
7.2 Donning in Cold Weather 23
7.3 Testing the Negative Pressure Seal 23
8 During Use 25
8.1 Cold Weather Operation 25
9 After Use 25
9.1 Doffing the Respirator 26
10 Cleaning and Disinfecting 27
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10.1 Facepiece 28
10.2 APR Adapter 29
11 G1 Spectacle Kit 32
12 Maintenance 33
13 Safekeeping and Storage 34
13.1 Facepiece 34
13.2 CBRN Applications 34
13.3 Shelf Life 34
14 Ordering Information 38
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1 Safety Regulations
This respirator complies with the National Institute for Occupational Safety and Health (NIOSH) regulation under 42 CFR Part
84.
1.1 NIOSH Approval Information
WARNING!
Read and obey all NIOSH approval limitations.
Failure to follow this warning can result in serious personal injury or death.
1.1.1 Certifying Agency Contact Information
National Institute for Occupational Safety and Health (NIOSH)
Phone: 800-CDC-4636
1.2 NIOSH 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 established by regulatory standards.
F- Do not use powered air-purifying respirators if airflow is less than four cfm (115 lpm) for tight
fitting facepieces 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.
J- Failure to properly use and maintain this product could result in injury or death.
L- Follow the manufacturer's User Instructions for changing cartridges, canisters 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 specified by the manufacturer.
O- Refer to User’s Instructions, and/or maintenance manuals for information on use and
maintenance of these respirators.
P- NIOSH does not evaluate respirators for use as surgical masks.
BB- Not for use for entry into atmospheres immediately dangerous to life or health.
CC- For entry, do not exceed maximum use concentrations established by regulatory standards.
FF-
Respirators are to be fit tested prior to use with the heaviest cartridges, canisters, filters and/or
accessories intended to be used. Fit testing should also be conducted while wearing all personal
protective equipment intended to be used. See User's Instruction for fit test requirements.
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1.3 NIOSH Cautions and Limitations of Use for Chemical, Biological, Radiological, and Nuclear (CBRN)
Applications
A- Not for use in atmospheres containing less than 19.5 percent oxygen.
J- Failure to properly use and maintain this product could result in injury or death.
L- Follow the manufacturer's User Instructions for changing cartridges, canisters 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 specified by the manufacturer.
O- Refer to Users 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, or death.
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
decontamination.
V- Not for use in atmospheres immediately dangerous to life and health or where hazards have not
been fully characterized.
W- Use replacement parts in the configuration as specified by the applicable regulations and
guidance.
X- Consult manufacturer’s User Instructions for information on the use, storage, and maintenance
of these respirators at various temperatures.
Y-
This respirator provides respiratory protection against inhalation of radiological and nuclear dust
particles. 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, immediately leave the area for clean air.
CC- For entry, do not exceed maximum use concentrations established by regulatory standards.
HH-
When used at defined occupational exposure limits, the rated service time cannot be exceeded.
Follow established canister change-out schedules or observe End-Of-Service-Life Indicators to
ensure that canisters are replaced before breakthrough occurs.
QQ-
Use in conjunction with personal protective ensembles that provide appropriate levels of
protection against dermal hazard. Failure to do so may result in personal injury even when the
respirator is properly fitted, used, and maintained.
UU-
The respirator should not be used beyond eight (8) hours after initial exposure to chemical
warfare agents to avoid possibility of agent permeation. If liquid exposure is encountered, the
respirator should not be used for more than two (2) hours.
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1.4 Important Notice for Respirator Users and Respiratory Protection Program Administrators
WARNING!
• This respirator provides LIMITED protection. A respirator paired with an appropriate particulate filter may help reduce
exposure to airborne biological agents, including avian (bird) flu virus, other types of influenza, SARS, or other bacterial
or viral biological agents, but WILL NOT ELIMINATE the risk of exposure, infection, illness, or death.
• This respirator is certified by NIOSH to comply with the requirements specified for the designated filter efficiency level;
however, the government has NOT established a safe level of exposure to biological agents. Therefore, the respirator
may NOT prevent transmission of influenza virus.
• Before occupational use of this respirator, a written respiratory protection program must be implemented meeting all the
local government requirements. In the United States, employers must comply with OSHA 29 CFR 1910.134, which
includes medical evaluation, training, and fit testing.
• An adequate respiratory protection program must include knowledge of hazards, hazard assessment, selection of
correct respiratory protective equipment, instruction and training in the use of equipment, inspection and maintenance of
equipment, and medical surveillance.
• This respirator will perform as designed only if it is used and maintained strictly according to the manufacturer's
instructions, labels, and limitations. The Program Administrator and the users must read and understand these
instructions before using or servicing this device.
• Do NOT substitute, modify, add, or omit parts. Use only exact replacement parts in the configuration specified by MSA.
• Examine the respirator regularly and maintain it according to the instructions in this manual. Only MSA trained repair
technicians can do repairs.
• If the respirator does not operate as specified in this manual, remove it from service and return it to an MSA trained repair
technician.
• This respiratory protective device does not supply oxygen. Use the device only in areas that have sufficient ventilation.
• Use this respirator with the correct air filtration cartridges/canisters for protection against specific chemical and/or
particulate contaminants. Do NOT use this device if you cannot make sure that the air filtration cartridges/canisters are
applicable for the contaminant. The respirator will not supply protection unless all inhaled air is pulled through an
applicable air filtration cartridge/canister.
• Do NOT use this device if:
○ The identity of the contaminant is unknown.
○ The concentration of the contaminant is unknown.
○ The permissible exposure limit (PEL), recommended exposure limit (REL), and/or threshold limit value (TLV) of
the contaminant is unknown.
• An approved professional must supply an applicable change-out schedule for air filtration cartridges/canisters, unless
the cartridges/canisters have an end-of-service-life indicator. The change-out schedule must include all factors that have
an effect on respiratory protection, including work practices and other conditions that are specific to the users'
environment.
• If this respirator is used for protection against substances that have poor warning properties, there is no secondary
method of notification about when to replace the air filtration cartridges/canisters. Obey applicable additional precautions
to prevent overexposure, such as a more conservative change-out schedule or use of a supplied-air respirator (SAR) or
self-contained breathing apparatus (SCBA).
• Do NOT use this device with urethane paints or other paints that have diisocyanates unless there is a change-out
schedule for air filtration cartridges/canisters. Because of their poor warning properties, overexposure to these
substances can occur without user awareness and result in severe permanent damage to the respiratory system.
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• Go out of a contaminated area immediately if:- Breathing becomes difficult.- Dizziness or other distress occurs.- You
taste or smell a contaminant.- You feel irritation of the nose or throat.- You are instructed to do so by responsible
personnel.
• If you have a beard, large sideburns, or similar physical characteristics that prevent direct contact between your skin and
the sealing surface of the facepiece, this device may not seal correctly with your face (refer to NFPA 1500, Standard on
Fire Department Occupational Safety and Health Program, and ANSI Z88.2, Practices for Respiratory Protection). An
incorrect facial seal can let contaminants leak into the facepiece, decreasing or removing respiratory protection. Do NOT
use this device if such conditions exist.
• Do a negative pressure seal test before each use.
• Individuals who wear eyeglasses must use the G1 spectacle kit to guarantee a correct fit. Ordinary eyeglasses cannot
be worn under the facepiece.
• Do NOT use this device in explosive or flammable atmospheres.
• Do NOT use this respirator, or air filtration cartridges/canisters for protection against exposure to radiation. They may
not supply sufficient protection.
• The respirator can help decrease exposure to airborne biological agents, including the H1N1 (swine) flu virus, avian (bird)
flu virus, other types of influenza, severe acute respiratory syndrome (SARS), or other bacterial or viral biological
agents, and the risk of influenza infection during a pandemic. This respirator does NOT remove the risk of exposure,
infection, illness, or death.
• The respirator is certified by NIOSH to comply with the requirements specified for the designated filter efficiency level.
Applicable authorities have not, however, set a safe level of exposure to biological agents. Therefore, the respirator may
not prevent transmission of the influenza virus.
• Refer to the Centers for Disease Control and Prevention (CDC) at www.cdc.gov for guidance on the use of respirators
to help decrease exposure to viral pathogens or other airborne biological agents in community, home, and occupational
settings. The CDC recommends fit testing, medical evaluations, and training for optimal effectiveness when a respirator
is used in a non-occupational setting. Neglecting these preparatory measures may cause an unsafe condition.
Respirators used in an occupational setting MUST be used in accordance with a complete respiratory protection
program as required by OSHA, which includes proper selection, training, fit-testing, and fit-checking. Detailed
information on a respiratory protection program is available by contacting OSHA or visiting www.osha.gov.
• The CDC recommends frequent hand washing and wearing gloves to help prevent transmission of disease due to
exposure to surfaces where contaminants may be present, and also immediately following removal of the respirator.
• Do NOT remove respirator in contaminated areas. The outer surface of the respirator MUST be treated as if it is
contaminated at all times. A respirator will NOT prevent one from exposure to the flu or other airborne biological agents in
other ways such as by touching the mouth, nose, or eyes with contaminated hands or objects. Biological agents, such
as the flu virus, can be transmitted when infected individuals cough or sneeze and spread virus particles through the air
to exposed surfaces which are touched. Tight-fitting safety goggles, or a full-facepiece respirator, may further help
prevent transmission of viral pathogens or other airborne biological agents.
• The G1 APR Facepiece is equipped with an exhalation valve. The facepiece does not filter air that is exhaled by the user
and this unfiltered air can enter the surrounding environment. Do not use where a sterile field is required without
additional, appropriate source control measures in place. Consult CDC guidance.
• ALWAYS clean cartridge/canister-style respirators before use in accordance with the instructions in this manual.
• This respirator is NOT for use by (a) children or (b) people with a medical condition who may be adversely affected by
using it.
• When filters are used in an application that makes sparks, make sure that the filters are protected by a shield. Sparks
can cause damage to filters and decrease the level of protection.
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1 Safety Regulations US

• Do NOT remove the respirator until it and other protective clothing are decontaminated. Otherwise, exposure to
contaminants can occur. In CBRN applications, this includes exposure to CBRN agents.
• Do NOT replace the air filtration cartridges/canisters in a contaminated area.
• Obey the decontamination and disposal procedures set by the applicable authorities.
• Make sure that there is no blockage of the air filtration cartridges/canisters.
• The respirator has no user-serviceable parts except as instructed in this manual.
• If the respirator falls to the ground during use, go out of the contaminated area immediately. Examine the device for
damage. If the device is damaged, contaminants can get into the filtration system.
Failure to follow these warnings can result in serious personal injury or death.
1.5 For CBRN Application Only
WARNING!
• Do NOT use this device without the correct training and a complete understanding of its limitations. Misuse can prevent
the respirator from supplying the necessary protection.
• This respirator supplies LIMITED protection. The device is approved by NIOSH for respiratory protection against
atmospheres containing chemical, biological, radiological, and nuclear (CBRN) warfare agents; however, it cannot
protect against all possible warfare agents.
• Use this device with the applicable personal protective equipment and clothing necessary to supply protection against
dermal hazards.
• Wear impermeable protective clothing to prevent exposure to gases and vapors that can poison by skin absorption.
• Exposure to some CBRN agents may not show immediate effects, but can result in delayed impairment, illness, or
death.
• CBRN agents may NOT be identified by smell or sight. Don the respirator before going into an area that may contain a
CBRN agent. Obey the procedures set by the applicable authorities.
• Do NOT use this respirator for more than 8 hours after initial use in an atmosphere that contains CBRN agents or more
than 2 hours after initial use in an atmosphere that contains CBRN agents in liquid or mist form. Otherwise, agent
permeation can occur.
Failure to obey these warnings, in addition to all instructions and protective measures for CBRN agents, can result
in serious injury or death.
1.6 References
For more information about the use and performance standards for the respirator, consult the following publications:
• ANSI Z88.2 latest edition, Practices for Respiratory Protection. American National Standards Institute,
https://webstore.ansi.org/Info/Sdolist
• CAN/CSA-Z94.4 latest edition, Selection, Use, and Care of Respirators. CSA Group, https://store.csagroup.org/
• ISO 2230 latest edition, Rubber Products - Guidelines for Storage. International Organization for Standardization,
https://www.iso.org/store.html
• NFPA 1500 latest edition, Standard on Fire Department Occupational Safety and Health Program, National Fire
Protection Association, https://www.nfpa.org/Codes-and-Standards
• Title 29 CFR Part 1910, Occupational Safety and Health Standards, https://www.osha.gov/law-regs.html
• Title 29 CFR Part 1910.134, Respiratory Protection Standard, https://www.osha.gov.law-regs.html
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1.7 Contact Information
For product concerns, contact your local MSA authorized repair center or distributor, who will provide the necessary
information to MSA for issue resolution.
To report any serious concerns or to inquire about the products, use the following contact information:
MSA North America
Corporate Center
MSA Canada MSA de Mexico, S A De C V
1000 Cranberry Woods Drive
Cranberry Township, PA 16066
Phone 1-800-MSA-2222
Fax [phone]
16435 118th Avenue
Edmonton AB T5V 1H2
Phone 1-800-MSA-2222
Fax [phone]
Fraccionamiento Industrial Avenida
Del Conde #6
76240 El Marques, Queretaro
Phone [phone]
Fax [phone]
1.8 Warranty
MSA - The Safety Company (MSA) warrants MSA G1 Air-Purifying Respirator (APR) to be free from defects in materials
and/or faulty workmanship for a period of fifteen (15) years from the date of sale by MSA. This warranty applies to all
components of the APR including all accessories and optional equipment purchased and supplied at the time of the original
sale of the APR, except consumable parts, as defined by the terms of sale. MSA’s obligation under this warranty is limited to
the repair or replacement, at MSA’s option, of the APR or components shown to be defective in either workmanship or
materials.
No agent, employee or representative of MSA may bind MSA to any affirmation, representation or modification of the warranty
concerning the goods sold under this contract. MSA makes no warranty concerning components or accessories not
manufactured by MSA, but will pass on to the Purchaser all warranties of manufacturers of such components.
MSA shall be released from all obligations under this warranty in the event that repairs or modifications are made by persons
other than its own or authorized service personnel, or if the warranty claim results from accident, alteration, misuse, or abuse.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTEES, EXPRESSED, IMPLIED, OR STATUTORY
INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. IN ADDITION, MSA EXPRESSLY DISCLAIMS ANY LIABILITY FOR ECONOMIC,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IN ANY WAY CONNECTED WITH THE SALE OR USE
OF MSA PRODUCTS, INCLUDING, BUT NOT LIMITED TO, LOSS OF ANTICIPATED PROFITS.
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1 Safety Regulations US

2 Description
The G1 Air-Purifying Respirator (APR), hereafter referred to as respirator or device, is an air-purifying respirator for use in
atmospheres which are not immediately dangerous to life or health (non-IDLH). Inhaled air is pulled through the air filtration
cartridges/canisters, which contain adsorbents and a filter that removes or neutralizes specific contaminants. Exhaled air is
released through the exhalation valve. This device is intended for applications where it is necessary for users to go into or work
within a hazardous area for a limited time.
For NIOSH approval information, refer to the G1APR Approval Insert (PN10160485).
For information about approved configurations for the head harness, refer toTable 1 .
The device has the following components:
• G1 facepiece
• APR adapter (single or twin port)
• Air filtration cartridge/canister
The device has the following optional component:
• G1 spectacle kit
2.1 G1 Facepiece
The facepiece is available in three sizes (small, medium, large). The nosecup is
available in three sizes (small, medium, large). The facepiece includes a large lens
to optimize field of view and a mechanical speech diaphragm to enhance speech
communication. When the facepiece is not connected to the APR adapter, an
opening in the facepiece connection lets airflow bypass the inhalation and
exhalation valves, which decreases breathing resistance and further enhances
speech communication. The facepiece includes a broad range of head harness
designs and material options. An optional spectacle kit is available.
2.2 APR/PAPR Adapters
The adapters let you attach air filtration cartridges/canisters to the facepiece.
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Adapters connect to the facepiece with a push-to-connect (PTC) connection and disconnect from the facepiece with a release
button.
Figure 1 APR Adapter, Single Port Figure 2 APRAdapter, Twin Port
2.3 OptimAir TL Powered Air-Purifying Respirator (PAPR)
The OptimAir TLis a blower-assisted Powered Air-Purifying Respirator (PAPR).
Refer to the OptimAir TL user instructions (PN10077289) for NIOSHapproval
information and Cautions and Limitations
2.4 Air Filtration Cartridges/Canisters
The air filtration cartridges/canister contains adsorbents and a filter that removes or neutralizes specific contaminants.
Figure 3 For Single Port Adapter Figure 4 For Two Port Adapter Figure 5 For OptimAir TLPAPR
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2 Description US

2.5 G1 Spectacle Kit
The G1 spectacle kit lets users mount eyeglasses inside the facepiece. Individuals who
wear eyeglasses must use the G1 spectacle kit to guarantee a correct fit. Eyeglasses
cannot be worn under the facepiece without the G1 spectacle kit.
3 Size Selection
NOTE: Individuals who wear eyeglasses must use the G1 spectacle kit to guarantee a correct fit. Ordinary eyeglasses cannot
be worn under the facepiece.
Regardless of facial dimensions and respirator sizing charts, users must do an actual qualitative or quantitative respirator fit
test to make sure that the correct respirator size is selected.
1. Do a fit test of the respirator size relative to your facial features and dimensions. Ask the safety administrator or program
manager for help selecting the initial size to try.
2. Don the respirator. Refer to 7 Donning for instructions.
3. Do a negative pressure seal test. Refer to 7.3 Testing the Negative Pressure Seal for instructions.
4. If the respirator does not pass the negative pressure seal test or feels uncomfortable, try the next nearest size relative to
your face.
5. Passing the negative pressure seal test does not verify that the size is correct. Do a qualitative or quantitative respirator
fit test to verify the size. If the respirator passes a negative pressure seal test but does NOT pass a respirator fit test, try
the next nearest size.
3.1 Respirator Fit Test
WARNING!
• Do quantitative or qualitative respirator fit tests routinely for each wearer of this respirator.
• Obey all specified warnings and limitations.
Failure to follow these warnings can result in serious personal injury or death.
Refer to ANSI Z88.2 latest version, Practices for Respiratory Protection, and Title 1910.134, Respiratory Protection Standard,
for information about respirator fit tests.
In addition to regular respirator fit tests, do a qualitative or quantitative respirator fit test after repairs or maintenance.
NOTE: The selection of a fit test method can have an effect on the maximum use concentration.
Use the instructions and adapter in a Quik Chek Kit (PN 805078) to do respirator fit testing.
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3.1.1 Quantitative Test
For use in a CBRN application, a fit factor of at least 2000, based on ambient aerosol fit test methods or equivalent, is
necessary before any type of respirator is assigned to an individual.
3.1.2 Qualitative Test
Only validated protocols are acceptable. The respirator must pass a test designed to assess a fit factor of at least 2000.
4 Visual Examinations
WARNING!
• Do NOT examine the respirator before it is decontaminated, cleaned, and disinfected if there is a risk of exposure to
contaminants. Obey the applicable decontamination procedures, clean and disinfect the respirator, then examine it.
• If the respirator shows any of the conditions listed in Section4 Visual Examinations, remove the respirator from service
and return it to an MSA trained repair technician.
• Do NOT substitute, modify, add, or omit parts. Use only exact replacement parts in the configuration specified by MSA.
Failure to follow these warnings can result in serious personal injury or death.
Do a visual inspection upon receipt, and before and after each use.
Examine the entire respirator after it is decontaminated, cleaned and disinfected.
4.1 All Components
Examine all components for deterioration, dirt, cracks, debris, tears, holes, stickiness, heat- or chemical-related damage, or
other signs of damage.
Make sure that the respirator is complete and assembled correctly. Refer to 6 Preparing for Use for instructions.
Do all of the following component-specific inspections.
4.2 Facepiece
Examine the lens for cracks, scratches, deformation, or color changes.
Make sure that the facepiece rubber has a tight seal and is attached to the lens ring tightly.
Make sure that the exhalation valve is clean and operates easily. Make sure that the valve moves off the seat and returns
when released (from inside the facepiece).
Examine the facepiece inlet for damage. Make sure that the inhalation valve is in position.
Examine the nosecup to make sure that the check valves or air guides are in position. Make sure that the nosecup is attached
to the component housing tightly.
Examine the nosecup, inhalation port, inhalation valves, exhalation valves, and exhalation port for dust, Kevlar fibers, and
other debris. If necessary, refer to 10 Cleaning and Disinfecting for instructions to clean these components.
Make sure that the straps for the head harness are not torn, cut, worn, fraying, or missing buckles.
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4 Visual Examinations US

4.3 APR Adapter
4.3.1 Single Port
Examine the APR adapter for cracks, scratches, deformation, or color changes.
Examine the adapter gasket (green), O-ring, and seal ring for wear or damage.
Remove the adapter cover to examine the exhalation valve. Make sure that the valve moves off the seat and returns when
released.
Examine the Rd 40 threads for damage.
4.3.2 Twin Port
Examine the APR adapter for cracks, scratches, deformation, or color changes.
Examine the adapter gasket (orange), O-ring, and seal ring for wear or damage.
Remove the adapter cover to examine the exhalation valve. Make sure that the valve moves off the seat and returns when
released.
Examine the bayonets for damage.
4.4 Air Filtration Cartridge(s)/Canister
4.4.1 Single Port Cartridge(s)/Canister
Examine the air filtration cartridge(s)/canister for cracks, scratches, deformation, or color changes.
Examine the Rd 40 threads for damage.
Look at the label on the air filtration cartridge(s)/canister to make sure that the shelf life has not expired.
4.4.2 Twin Port Cartridges
Examine the air filtration cartridges for cracks, scratches, deformation, or color changes.
Look at the label on the air filtration cartridge to make sure that the shelf life has not expired.
4.4.3 OptimAir TL PAPR
Refer to the OptimAir TL user instructions (PN10077289) for NIOSHapproval information and Cautions and Limitations.
5 Before Use
5.1 Respirator Use Limitations
WARNING!
• An approved professional must supply an applicable change-out schedule for air filtration cartridges/canisters, unless
the cartridges/canisters have an end-of-service-life indicator. The change-out schedule must include all factors that have
an effect on respiratory protection, including work practices and other conditions that are specific to the users'
environment.
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• If this respirator is used for protection against substances that have poor warning properties, there is no secondary
method of notification about when to replace the air filtration cartridges/canisters. Obey additional precautions to prevent
overexposure, such as a more conservative change-out schedule or use of an SAR or SCBA.
Failure to follow these warnings can result in serious personal injury or death.
This is an approved air-purifying respirator ONLY when it is used in an approved configuration. For information about approved
configurations, refer to the G1 APR Approval Insert (PN 10160485). For information about approved configurations for the head
harness, refer to Table 1 . Do not exceed the maximum use concentrations set by regulatory standards.
Users must comply with the following MSA respirator use limitations.
Do not exceed the following maximum use concentrations during use:
• 50 times the exposure limit for the contaminants in the environment if a quantitative fit test is used. Using a qualitative fit
test can decrease the maximum use concentration.
• Immediately dangerous to life or health (IDLH) concentration for any contaminant in the environment.
The following is a PARTIAL list of substances that have poor warning properties.
Acrolein Nitric Acid
Aniline Nitro compounds:
Arsine - Nitrogen oxides
Bromine - Nitroglycerin
Carbon monoxide - Nitromethane
Diisocyanates Ozone
Dimethyl sulfate Phosgene
Hydrogen cyanide Phosphine
Hydrogen selenide Phosphorous trichloride
Methanol Stibine
Methyl bromide Sulfur chloride
Methyl chloride Urethane or other diisocyanate containing paints
Methylene chloride Vinyl chloride
Nickel carbonyl
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5 Before Use US

5.2 Exposure Limits
Refer to the applicable exposure limits from the following sources:
• 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.
5.3 Mixtures of Contaminants
WARNING!
If any one contaminant in a mixture is the same as or more than the IDLH concentration, the entire mixture is IDLH. Do NOT
use the respirator, except for escape when the respirator is used in a gas mask configuration.
Failure to follow this warning can result in serious personal injury or death.
NIOSHapproves of mixing the following contaminants:organic vapors, chlorine, chloride dioxide, hydrogen sulfide, sulfur
dioxide, ammonia, and carbon monoxide.
Particulates can be mixed with any other particulate or any gas or vapor for which the air filtration cartridges/canisters are
approved.
This respirator can be used for protection against a mixture of contaminants in an environment at the same time or against one
contaminant then another (using the same air filtration cartridges/canisters) ONLY in the following conditions:
• The air filtration cartridges/canisters are approved for all contaminants in the environment.
• Contaminants in the environment at the same time are less than the IDLH levels for the specific contaminants.
5.4 Exposure Limits for Mixtures
ACGIH publishes the following information to calculate the threshold limit value (TLV) of a mixture:
First, use the following formula to calculate the total concentration of the chemical mixture (CMixture) from the individual
contaminant concentrations (C1, C2, C3...):
(CMixture) = C1+C2+C3…
Use the following formula to calculate the TLV of the mixture, where T1, T2, T3, ... are the individual contaminant TLVs and
C1, C2, C3... are the individual contaminant concentrations:
TMixture =CMixture
C1+C2+C3+ ....
T1T2T3
Use these equations ONLY if the contaminants in the environment are actually mixed. Some substances do not mix and may
be in the environment separately, for example, in pockets or at different levels. In that case, use the lowest TLV of the
substances in the environment to find the applicable respirator category for protection against all contaminants in the
environment.
17 G1 APR Facepiece
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6 Preparing for Use
Make sure that the device does not have any of the conditions listed in 4 Visual Examinations.
Make sure that there are no parts missing from the assembled device.
Make sure that the device is in an approved configuration. For information about approved configurations, refer to the G1APR
Approval Insert (PN10160485).
Make sure that the air filtration cartridges/canisters are approved for and effective against all contaminants in the environment.
Make sure that the head harness is in an approved configuration.
Head Harness Neck Strap
Model # Description Model # Description Model # Description
7-2830-1 Rubber 7-2829-1 Cloth
7-2776-1 4-Point Kevlar (Yellow) Approved Approved
7-2777-1 5-Point Kevlar (Yellow) Approved Approved
7-2778-1 5-Point Rubber Approved Approved
7-3104-1 4-Point Cloth (Black) Not approved Approved
7-2917-1 5-Point Kevlar Alternate (Yellow) Approved Approved
Table 1 Approved configurations for the head harness
6.1 Installing the APR/PAPR Adapter (Single and Twin Port)
1. Push the APR adapter inward until you hear a click when it engages correctly in
the facepiece. When the APR adapter is installed correctly and the facepiece is
held in the as-worn position, the MSA logo is aligned horizontally.
2. Pull on the APR adapter to make sure that it is attached tightly to the facepiece.
G1 APR Facepiece 18
6 Preparing for Use US

6.2 Installing/Replacing Air Filtration Cartridges/Canisters
WARNING!
• Use this respirator with the correct air filtration cartridges/canisters for protection against specific chemical or particulate
contaminants. Do NOT use this device if you cannot make sure that the air filtration cartridges/canisters are applicable
for the contaminant. The respirator will not supply protection unless all inhaled air is pulled through applicable air filtration
cartridges/canisters.
• Do NOT use air filtration cartridges/canisters with an expired shelf life.
• Do NOT use the air filtration cartridges/canisters if the packaging is opened, damaged, or missing. Make sure that the air
filtration cartridges/canisters are in its original packaging before use in a contaminated environment.
• Do NOT replace the air filtration cartridges/canisters in a contaminated area.
• Obey the decontamination and disposal procedures set by the applicable authorities.
Failure to follow these warnings can result in serious personal injury or death.
6.2.1 Single Port (APR/PAPR)
Use the air filtration cartridges/canisters immediately after removing them from the packaging.
Replace the air filtration cartridges/canisters after each use.
Discard used air filtration cartridges/canisters according to the decontamination and disposal procedures set by the applicable
authorities.
Obey the change-out schedule for the air filtration cartridges/canisters.
When used at specified occupational exposure limits, do NOT exceed the rated service time.
1. Remove the air filtration cartridges/canisters from the packaging.
2. Make sure that the air filtration cartridges/canisters are not damaged.
3. Make sure that the air filtration cartridges/canisters are applicable for use against all contaminants in the environment.
4. Look at the label on the air filtration cartridges/canisters to make sure that the shelf life has not expired. If the shelf life
has expired, do NOT use the air filtration cartridges/canisters.
5. Attach the air filtration cartridges/canisters to the facepiece port and hand-tighten
it.
6.2.2 Twin Port (APROnly)
Use the air filtration cartridges immediately after removing them from the packaging.
Replace the air filtration cartridges after each use.
Discard used air filtration cartridges according to the decontamination and disposal procedures set by the applicable
authorities.
Obey the change-out schedule for the air filtration cartridges.
19 G1 APR Facepiece
US 6 Preparing for Use

When used at specified occupational exposure limits, do NOT exceed the rated service time.
1. Remove the air filtration cartridges from thepackaging.
2. Make sure that the air filtration cartridges are not damaged.
3. Make sure that the air filtration cartridges are applicable for use against all contaminants in the environment.
4. Look at the label on the air filtration cartridges to make sure that the shelf life has not expired. If the shelf life has
expired, do NOT use the air filtration cartridges.
5. Attach the air filtration cartridges to the facepiece port.
a. Align the small lug on the connector with the match-mark on the cartridge
body to mate the cartridge cutouts with the bayonet lugs.
b. Turn the cartridge clockwise until tight.
7 Donning
WARNING!
• If you have a beard, large sideburns, or similar physical characteristics that prevent direct contact between your skin and
the sealing surface of the facepiece, this device may not seal correctly with your face (refer to NFPA 1500, Standard on
Fire Department Occupational Safety and Health Program, and ANSI Z88.2, Practices for Respiratory Protection). An
incorrect facial seal can let contaminants leak into the facepiece, decreasing or removing respiratory protection. Do NOT
use this device if such conditions exist.
• Do a negative pressure seal test before each use and before going into a toxic atmosphere.
• Make sure that the correct nosecup is installed in the facepiece. Refer to the G1 APR Approval Insert (PN 10160485) for
information about approved configurations.
• Individuals who wear eyeglasses must use the G1 spectacle kit to guarantee a correct fit. Ordinary eyeglasses cannot
be worn under the facepiece.
• Wear impermeable protective clothing to prevent exposure to gases and vapors that can poison by skin absorption.
• Only remove the respirator in a safe, nonhazardous, nontoxic atmosphere.
Failure to follow these warnings can result in serious personal injury or death.
Make sure that the APR adapter and applicable air filtration cartridges/canisters are installed before you don the respirator.
When the respirator is adjusted correctly, the user should not taste or smell the contaminant, or feel irritation of the eyes, nose,
or throat. The user's inhalation resistance should be as experienced during training.
7.1 Donning in Normal Weather
WARNING!
• Make sure that the top of the facepiece seal is in direct contact with your forehead.
• Make sure that there is no hair between the facepiece seal and your skin.
Failure to follow these warnings can result in serious personal injury or death.
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