CFA MSA G1 User manual

MSA G1 Classic
Breathing Apparatus
Reference Manual
This manual is published for use within CFA in conjunction with participation in a
course of instruction.
It has been developed having regard to current CFA occupational health and safety
guidelines and “Safety First” principles.
Edition 1
December 2019

SAFETY FIRST
MSA G1 Classic Breathing Apparatus
CFA acknowledges the assistance and contribution of its members, volunteer and staff.This publication is based
on materials provided by MSA, the Safety Company, Schlüsselstrasse 12, 28640 Rappersil-Jona, Switzerland,
Permission to use the materials has been granted by MSA.
© State of Victoria (Country Fire Authority) 2019
The w orkcontained in this publication is licensed under a Creative Commons Attribution 4.0 licence,
http://creativecommons.org/licenses/by/4.0/. You are free to re-use the workunder that licence, on the condition
that you credit the State of Victoria (Country Fire Authority) as author, indicate if changes weremade and comply
withthe other licence terms. The licence does not apply to:
•any branding, including Country Fire Authority (CFA) and Government logos;
•any photographs and images; and
•any content supplied by third parties.
CFA makes this information available on the understanding that you take reasonable care whenusing it. If you
have any uncertainty about the application of the information to your particular circumstances you should obtain
professional advice.
CFA does not accept responsibility for how you apply or rely on the information in this
publication.
Publisher
First published December 2018 in Australia by CFA Training (RTO 3739), CFA Headquarters, 8 Lakeside Drive,
Burw ood East, Victoria 3151.
Edition 2 published May 2019.
For any matters relating to this publication, contact: Manager Learning Governance & Systems, CFA
Headquarters, 8 Lakeside Drive, Burwood East, Victoria 3151.

Edition 1 – December 2019 SAFETY FIRST i
MSA G1 Classic Breathing Apparatus
Contents
Foreword........................................................................................................................1
Introduction................................................................................................................... 2
Awareness of MSA G1 Electronic BA................................................................................2
Related Resources ..........................................................................................................5
Icons in this Manual .........................................................................................................5
Chapter 1 Specifications and General Precautionary Safety Measures.......7
Terminology ....................................................................................................................7
General Description and Specifications of the G1 C ...........................................................8
Precautionary Safety Measures ......................................................................................10
Chapter 2 Cylinder and Components...................................................................13
Cylinder ........................................................................................................................13
MSA G1 Classic BA.......................................................................................................19
Components..................................................................................................................20
Chapter 3 Operation..................................................................................................39
Functional Pre-Operational Check ..................................................................................39
Visual Inspection ...........................................................................................................39
Changing the Cylinder....................................................................................................43
Functional Test..............................................................................................................48
Chapter 4 Donning and Doffing.............................................................................53
Flash Hood....................................................................................................................53
Don the BA Set..............................................................................................................58
Distress Signal Unit........................................................................................................68
Post Incident Wash-Down ..............................................................................................70
Doff the BA set..............................................................................................................71
Doff the Flash Hood.......................................................................................................77
Emergency Shared Air Procedure (Buddy Breathing).......................................................79
Chapter 5 After-use Care and Maintenance........................................................85
Authorised Service.........................................................................................................85
Cleaning the BA After Use..............................................................................................85
After Doffing..................................................................................................................88

Contents
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MSA G1 Classic Breathing Apparatus
Cleaning of Facemask ...................................................................................................88
Cleaning the DSU..........................................................................................................92
Storage of the BA ..........................................................................................................92
Abbreviations..............................................................................................................93
Acknowledgements...................................................................................................93

Foreword
Edition 1 – December 2019 SAFETY FIRST 1
MSA G1 Classic Breathing Apparatus
Foreword
After extensive testing and consultation with other emergency services in Victoria, CFA
commencedthe deployment of the MSA G1 range of BAduring 2018. This
standardises the BA sets throughout CFA and enhance inter-operability between
services.
The MSA G1 Classic BA brings added comfort to the wearer by way of larger, non-slip,
shoulder straps,weight distribution being on the hips rather than the shoulders, and a
rotating height adjustable lumber support to cater for all body types.
An additional safety feature of the MSA G1 Classic BAis the ability to attach, through a
buddy breathing line, to other users.
The MSA G1 Classic BAfacemask has been designed with a speech diaphragm and
incorporates an open port to help direct the voice and enable clear communications
between users. The air flow is directed over the interior visor of the maskto eliminate
fogging of the visor. There are three sizes(small,medium and large) available to
ensure a comfortable and secure seal for all users.The medium sizefacemaskfits
98% of users.
The MSA G1 Classic BA provides flexibility for operators and controllers and will
provide a base platform for future growth in BA technology.
This manual described how to operate the MSA G1 Classic breathing apparatus.

Introduction
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MSA G1 Classic Breathing Apparatus
Introduction
This manual is designed to provide you with information and instructions on the
operation and capabilities of the MSA G1 Classic (G1 C) self-contained breathing
apparatus (BA).
This manual contains information about the G1 C BA and covers the following topics:
specifications and general precautionary measures;
cylinder and components;
operation;
donning and doffing; and
after-use care maintenance.
It also contains a list of abbreviations.
Awareness of MSA G1 Electronic BA
Deployment
Throughout Victoria, there are two MSA G1 BA sets being utilised: the MSA G1
Electronic (MSA G1 E) and the MSA G1 Classic (MSA G1 C).
The MSA G1 E will be used by:
all CFA Class 5 brigades (as well as MFB and Ambulance Victoria);
CFA Class 4 brigades that support CFA Class 5 brigades that have a pumper or a
pumper tanker. There are been a few exceptions to this.
all CFA Class 3 brigades that directly support a Class 5 brigade with pumper or
pumper tanker only.
The MSA G1 C will be used at all other CFA brigades.
This manual covers the operation of the MSA G1 C.

Introduction
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MSA G1 Classic Breathing Apparatus
Aboutthe MSAG1 Electronic
The purpose of this topic is to ensure awareness of the MSA G1 E.
Both MSA G1 sets provide added comfortfor the wearer by way of larger, non-slip
shoulder straps,weight distribution being on the hips rather than the shoulders and a
rotating height adjustable lumber support catering for all body types. Both sets have
buddy breathing capability and the MSA G1 facemask, with three sizes available,
allows for a personalised fit, clearer communications and improved vision.
The MSA G1 C and MSA G1 E have the same buddy breathing manifold, enabling the
different sets to connect to each other in the event of an emergency and making it
possible for BA operators to share air. Furthermore, both sets have a low-pressure
warning whistle which operates at 55+/- 5 bar.
The MSA G1 E is electronic, while the MSA G1 C has pneumatic gauges and whistles.
The MSA G1 E set:
contains a battery;
has flashing buddy lights;
has a power module;
has an electronic low air alarm that will sound at 100 bar; and
a series of different alarms (including motion alarms) built into a dual gauge (i.e.
both digital and analogue) control module.

Contents
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MSA G1 Classic Breathing Apparatus
Comparison
This table provides a high-level overview of the two types MSA G1 sets.
Component MSA G1 Classic
(Pneumatic) MSG G1 Electronic (Electronic) 1
Wear comfort
large, non-slip shoulder straps
weight distribution being on the hips
rather than the shoulders
a rotating height adjustable lumber
support

Buddy breathing system 
Buddy lights 
Facemaskin three sizes 
Low pressurewarning whistle operating at
55+/- 5 bar 
Battery 
Power module 
Electronic low air alarm at 100 bar 
Series of different electronic alarms 
Stand-alone distress signal unit (DSU) 
Gauge Analogue Digital and analogue
ProceduresandFireGroundPractices
The procedures and Fire Ground Practices (FGPs) have been closely aligned between
the two MSA G1 models.During operations there is no difference when breathing air.
The differences relate to the lights and alarm sounds of the MSA G1 E BA. The MSA
G1 C and MSA G1 E remain interoperable and the procedures and processes arethe
same.
If you are working alongside a brigade that is using an MSA G1 E set, they remain
interoperable with the MSA G1 C and the procedures and process arestill the same.
1Refer to the MSA G1 Electronic manual for information about the components and operation.

Introduction
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MSA G1 Classic Breathing Apparatus
Related Resources
To identify additional and other related resources available, CFA members should
searchthe Members Online website using the title and key terms from this publication.
The website also contains the current CFA policies and procedures. Familiarity with
these will enable you to appropriately apply your learning.
Other manuals and documentation that relate to this equipment are:
conversion package PowerPoint for MSA G1 C;
MSA G1 CBA System Operating Manual;
MSA G1 FacepieceOperating Manual;
300 bar cylinder training video;
facemaskfitting procedures; and
CFA/MFB MSA G1 Electronic training material.
Icons in this Manual
The icons used in this reference manual have these meanings.
This icon is a safety note or safety warning. You must pay attention to the
information identified by this icon.
This icon is important information. You must pay attention to the information
identified by this icon.

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MSA G1 Classic Breathing Apparatus
Notes
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Chapter1
SpecificationsandGeneralPrecautionarySafety Measures
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MSA G1 Classic Breathing Apparatus
Chapter 1
Specifications and General
Precautionary Safety Measures
Thischapter contains information about:
terminology;
general description and specifications of the G1C; and
precautionarysafety measures.
Terminology
A wide range of terms refer to compressedair breathing apparatus used in irrespirable
atmospheres. Someof the terms include:
self-contained compressedair breathing apparatus (SCBA);
compressed air breathing apparatus (CABA); or
breathing apparatus (BA).
This manual uses the term breathing apparatus (BA).
BA Control/Entry
MFB use the term BA Entry. BA Entry is the term given to the entry point to the
fireground. All personnel going past this point into the incident must wear BA. The BA
Entry Officer is stationed at this point, and this is where BA tally tags are deposited and
collected.
The BA Control Officer is in charge of the overall control of the BA operations.

Chapter1
SpecificationsandGeneralPrecautionarySafety Measures
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MSA G1 Classic Breathing Apparatus
General Description and Specifications of the G1 C
Cylinder
Component Specification
Casing Carbon wrap aluminium composite
Size 625 mm x160 mm
Weight (total operational) 7.20 kg
Valve 90° assembly
Ratchet safety valve
Pressure 300 bar
Water capacity 6.8 litre
MSAG1 ClassicBA
The MSA G1 C is a pressure-demand self-contained breathing apparatus. It operates
independently from the ambient air in atmospheres immediately dangerous to life or
health (IDLH).
Breathable air is supplied to the operator from a compressed air cylinder via a pressure
reducer, a demand valve and a full facemask. The exhalation air is released directly
into the atmosphere via a one-way exhalation valve
The specifications for the G1 C BAare summarisedin this table.
Item Specification
Make MSA
Model G1 Classic
Back plate weight 4.8 kg
Total weight (including mask) 5.46 kg
Fully operational weight (including
cylinder) 12.46 kg
Standards NFPA, NIOSH, EN, British and Australian
Low pressurewarning whistle Operates at 55 ± 5 bar
Carry handle capacity 180 kg

Chapter1
SpecificationsandGeneralPrecautionarySafety Measures
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MSA G1 Classic Breathing Apparatus
Item Specification
Pressurereducer capacity 700 lpm
Tested underwater to 1 metre
Cleaning temperature +40˚C to +50˚C maximum
MSAMotionScoutDistressSignalUnit
This table summarises thespecifications of the MSA Motion Scout Distress Signal Unit
(DSU).
Component Specification
Size 95 mm x 70 mm x 44 mm
Housing Over moulded 2K (Silicone)
Version Activated by ON/OFF key
Audio output Main alarm 95 dB at 3 metres
Operating temperature -20°C to 55°C
Visual alarm Two bright red flashing LEDs for motion
and manually activated alarm visible from
the front, top and sides
Audible frequency 2000 to 3000 Hz
Weight including clip and batteries 230 g
Battery 2 x AA batteries
200 hours (activated)
> 8 hours (full alarm)
Controls 2 buttons
Display 3 LEDs
Intrinsically safe and tested to standards ATEX II 1G Ex ia IIC T3 / T4
Ingress protection rating (protection
against intrusion) IP67 (dust tight and protected against
immersion)
Flame engulfment EN 137

Chapter1
SpecificationsandGeneralPrecautionarySafety Measures
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MSA G1 Classic Breathing Apparatus
Precautionary Safety Measures
Error!
Objects
cannot be
created
from
editing
fieldcodes.
Only use the BA after receiving training on how to operate, don and doff
the set and correctafter-use maintenance.
Always verify the set’s operability. Do not usethe set if any of the tests
fail.
Do not expose the BA to any substances that will or might attack any part
of it or causing it to not perform as designed and approved.
Only use approved filling stations in accordance with Australian Standards
and National Regulations when filling cylinders.
Safe personapproach,dynamicriskassessment
Operators must apply the principles of Dynamic Risk Assessment outlined in
Joint Standing Operating ProcedureJ08.02 at all times.
Critical pressures
BA must not be placed on an appliance or in serviceif the pressurein the
cylinder is less than 250 bar.
BA operator must not commence initial operations if the pressurein the
cylinder is less 250 bar. Re-entry may commenceat 200 bar pressure
after completing a DRA and with the approval of the Incident Controller.
BA cylinder pressureof approximately 100 bar, notwithstanding a dynamic
risk assessment, should be allowed for exit/wash down activities.
BA cylinder pressureof approximately 110 bar is required for hazmat
decontamination.

Chapter1
SpecificationsandGeneralPrecautionarySafety Measures
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MSA G1 Classic Breathing Apparatus
Use in water
The BA is not intentionally to be used in water. However, under crucialcircumstances it
will operate in water to a depth of 1 metre.
Personal Flotation Devices (PFD) must be used in conjunction with BA for all marine
and waterway emergencies and for firefighting when working within two metres of a
body of water.
Othertypesof personalprotectiveequipment
Other types of personal protective equipment (PPE) worn during use of the BA must
also meet the prescribed standards.

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Notes
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Chapter2
CylinderandComponents
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MSA G1 Classic Breathing Apparatus
Chapter 2
Cylinder and Components
Thischapter contains information about the:
general principals of operation;
cylinder;
cylinder carriage; and
MSA G1 C BA components.
Cylinder
The compressed air cylinder used with the G1 C BA is a carbon wrap, aluminium
compositecylinder with a fibreglass outer wrap. These layers are then coated in a final
resin layer.
Figure 1 – Dräger300bar cylinder

Chapter2
CylinderandComponents
14 SAFETY FIRST Edition 1 – December 2019
MSA G1 Classic Breathing Apparatus
Figure 2 – Dräger300bar cylinder andcylinder makeup
Cylinderandvalveassembly
The cylinder and valve assemblystores high pressureair which will be reduced to
provide the BA operator breathable air.
The valve assemblyprovides the BA operator the ability to open the pressure to the
rest of the system. The valve assemblyconsists of a handwheel for opening and
closing the valve and a threaded high pressureconnection.
The 300 bar cylinder has a:
right angle valve;
ratcheting cylinder valve;
excess flow valve;
burst disc;
a vent hole in the threaded sectionto protect 200 bar pressure reducers from being
over pressurisedand
two passive radio frequency identification (RFID) chips for asset management
purposes.
The purpose of the excess flow valve is to reduce the rate of escaping air if required,
so that the cylinder does not becomea projectile. It does not affect performance during
normal use.
300 bar valve
Excess flow valve/filter
Aluminium liner
Protexal anti-corrosion layer
Carbon wrap
Fibreglass wrap
Fibreglass wrap
Final resin layer

Chapter2
CylinderandComponents
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MSA G1 Classic Breathing Apparatus
The burst disc is a safety mechanism that has been incorporated into the valve of the
cylinder. It is a sheet of thin metal that is designed to rupture at a specified pressure to
prevent over pressurisationof the cylinder. The burst disk is rated to a nominal burst
pressureof 405 bar and has a tolerance of -35 bar.
The two passive RFIDs are located in the handwheel and the neck of the cylinder.
The 300 bar cylinder will connect to a 200 bar pressurereducer as the
thread sizes arethe same(3/4 BSP) but the 300 bar cylinder will not
seal on a 200 bar pressure reducer.
A vent hole is located in the threaded section of 300 bar cylinder valves
to protect 200 bar pressurereducers.
Safe workingpractices
The cylinder meets all relevant Australian standards.
Do not drop the cylinder or bump the valve knob and handwheel.
Do not carry or move a cylinder by the handwheel. (Refer to the Carrying
of cylinders paragraph later on in this chapter how to correctly carrya
cylinder.)
Only use the handwheel to open and closethe cylinder valve.
Remove a cylinder from service and return to the State PPE&C
Management Centre with a fault report if:
it shows evidence of exposure to high heat or flame (such as labels
turned to a brown colour, charred or missing);
it has been dropped or the valve is out of alignment;
it is outside the hydrostatic testing date;
scratches or gouges in the resin layer of the cylinder have displaced
carbon fibres; or
any other damage is suspected.

Chapter2
CylinderandComponents
16 SAFETY FIRST Edition 1 – December 2019
MSA G1 Classic Breathing Apparatus
Only use the cylinder after receiving proper training.
Do not alter, modify or substitute any components without approval from
the State PPE&C Management Centre or adhering to CFA procedures.
Inspect the cylinder before and after use.
Do not use the cylinder if it is outside the hydrostatic testing date.
Misuse can result in serious injury or death.
Breathing apparatus cylinders should be fully recharged as soon as
possible after use.
Always leave some pressurein the cylinder, never fully exhaust it. As this
stopsnon-treated air from entering the cylinder which may contain
moistureand airborne contaminants.
Cylindervalve
The cylinder valve incorporates a soft plastic seat that is surrounded by brass. These
seats are easily damaged by over-tightening of the cylinder valve.
Figure 3 – softplasticsealusedinBAcylinders