MSA M1 User manual

MSAsafety.com
Operating Manual
M1 Modular SCBA System
Order No.: 10195758/01

MSA Europe GmbH
Schlüsselstrasse 12
8645 Rapperswil-Jona
Switzerland
[email protected]
www.MSAsafety.com
© MSA 2019 All rights reserved

3
GB
M1 Modular SCBA System
Contents
1 Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Correct Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Liability Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Safety and Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Full Face Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Pneumatics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 Pressure Reducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Manifolds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.3 Lung Governed Demand Valve (LGDV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.4 Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.5 alphaCLICK 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.6 Medium Pressure Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.7 High Pressure Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.8 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 14
2.3 Harness and Carrier Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 Harness Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2 Backplate Adjustment Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.3 Cylinder Strap (Cylinder Configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.4 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 17
3 Visual Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1 Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Tightness Check of the Pressure Reducer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5 Donning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2 SCBA Donning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 During Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Cold Weather Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 After Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1 Removing the SCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2 Changing the Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8 Maintenance and Care of the SCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.1 Maintenance Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9 Safekeeping and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9.1 Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10 Marking/Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.1 Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.2 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 33
11 Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4
Safety Regulations
GB
M1 Modular SCBA System
1 Safety Regulations
1.1 Correct Use
The MSA M1 - referred to hereafter also as device - is a pressure-demand self-contained
breathing apparatus (SCBA) operating independent of the ambient air for use in firefighting in
atmospheres immediately dangerous to life or health.
In combination with a certified facepiece (full face mask) the device protects the wearer against
inhalation of hazardous substances and mixtures, harmful biological agents and oxygen defi-
ciency.
Breathable air according to EN 12021 is supplied to the user from a compressed air cylinder via
a pressure reducer, a lung governed demand valve and a facepiece. The exhalation air is released
directly into the ambient atmosphere.
When fitted with twin cylinders, the breathing apparatus might exceed the weight limit specified in
EN 137:2006.
DANGER!
This device is a pure gas protection device. It is not suitable for underwater diving.
WARNING!
Only trained individuals should be allowed to use the device after ensuring sufficient knowledge
on donning and general use of the device. Failure to follow this warning can result in serious
personal injury or death.
WARNING!
Read this manual carefully before using 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 for their safety could sustain serious
personal injury or death.
Before use the product operability must be verified. The product must not be used if the function
test is unsuccessful, it is damaged, a competent servicing/maintenance has not been made,
genuine MSA spare parts have not been used.
1.2 Liability Information
MSA accepts no liability in cases where the device has been used inappropriately or not as
intended. The selection and use of the device are the exclusive responsibility of the individual
operator.
Product liability claims, warranties and guarantees made by MSA with respect to the device are
voided, if it is not used, serviced or maintained in accordance with the instructions in this manual.

5
Safety Regulations
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M1 Modular SCBA System
1.3 Safety and Precautionary Measures
• Approved for use at temperatures between -40 °C and +60 °C depending on facepiece certifi-
cation. For detailed information, see chapter 10.
• The device may be used in potentially explosive atmospheres according to the class stated in
chapter 10.1.
• The ATEX class of any other equipment used together with this device has to be regarded as
well. The lowest class sets the limit.
• If the device is used in an explosive atmosphere, dissipative clothes and footwear must be
used in conjunction with dissipative grounds. When used in explosive atmospheres there must
be direct contact between the head harness of the mask and the head. Do not use head cover-
ings (e.g.fire hoods) under the head harness.
• Compatibility with other types of Personal Protective Equipment (PPE) worn during use of the
device (e. g. clothing and helmets) has to be ensured according to Directive 89/656/EC.
• Use of the device in a vicinity that generates strong electrostatic charges in explosive atmo-
spheres is not allowed.
• Do not expose the device to any substances that will or might attack any part of the SCBA,
causing the SCBA to not perform as designed and approve
1.4 Contact Information
In the event of a product concern, contact the local MSA authorized repair center or distributor,
they will provide the necessary information to MSA for issue resolution. To report any serious
concerns or to inquire about the products, go to MSAsafety.com for information on the local MSA
authorized repair center or distributor.
Only use breathable air quality in accordance with EN 12021 and other applicable
national regulations.

6
Description
GB
M1 Modular SCBA System
2 Description
The M1 SCBA is a pressure-demand self-contained open circuit breathing apparatus (SCBA)
operating independent of the ambient air for use in atmospheres immediately dangerous to life or
health.
Breathable air is supplied to the user from a compressed air cylinder via a pressure reducer, a
lung governed demand valve (LGDV) according to EN 137:2006 and a full face mask according
to EN 136:1998 (see operating manuals of lung governed demand valve and full face mask). The
exhalation air is released directly into the ambient atmosphere.
The M1 SCBA can be configured via an ATO code with SingleLine, classic pneumatic or fixed
pneumatic. The fixed pneumatic does not include an integrated medium pressure coupling to
easily disconnect the LGDV from the pressure reducer. The following overview shows all options
for the SingleLine and classic configuration:
Fig. 1 Overview of SingleLine configuration (left) and classic configuration (right)
Mirroring of displayed options is possible. A maximum of three medium pressure couplings is
allowed.
A SingleLine configuration B Classic configuration
1 SingleLine and warning signal 1 Front warning signal line and medium pressure coupling
with SingleLine manifold or warning signal on pressure
reducer
2 Air cascade connection** 2 Air cascade connection (option)*, **
3 QuickFill 4 Rescue line*
4 Rescue line 5 Pressure reducer
5 Pressure reducer 5a/b SingleLine ports (medium pressure and high pressure)
5a/b SingleLine ports (medium pressure and high pressure) 5c/d Medium pressure ports (only)
5c/d Medium pressure ports (only) 6 Main medium pressure line*
7 High-pressure line
* In case of air cascade connection option, rescue line must be removed if warning signal is in use
** For air cascade applications, use hose with non-return nipple
1
22
1
3
46
4
7
5a 5b
5c 5d
5
A B

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Description
GB
M1 Modular SCBA System
Fig. 2 Example of M1 SCBA with SingleLine
1 Cylinder strap 6 Backplate
2 SingleLine 7 Handle
3 Cylinder buckle 8 Hip belt
4 Shoulder strap 9 Pressure reducer
5 Manifold (here SingleLine SCOUT)
1345
6
7
8
9
2

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Description
GB
M1 Modular SCBA System
Fig. 3 System Overview (schematic representation)
1
22a 2b 2c
3
4a
4b
4g
5a
5b
6a 6b
7a
2d
7c
7b
4c
3a
3b
3c
4d
4e
4f
5c
8
4h

9
Description
GB
M1 Modular SCBA System
The backplate consists of an anatomically designed plate of antistatic plastic with handles for easy
transport of the apparatus. The pressure reducer is located in the lower section of the backplate.
On the upper part of the backplate, a cylinder support is attached with integrated hose retainer.
The shoulder straps and the hip belt are adjustable in length.
One or two compressed air cylinders can be placed on the cylinder support. The cylinder strap is
adjustable and after inserting the compressed air cylinder(s), it is tightened and secured using the
cylinder buckle.
The structure of the compressed air breathing apparatus is based on a modular design. This
allows the user to configure the compressed air breathing apparatus from the modules available
to match his specific requirements.
2.1 Full Face Mask
The M1 SCBA can be used with the G1 Facepiece, 3S and Ultra Elite full face mask. For more
information, see relevant operating manual.
1 Mask 5a Pressure reducer with alphaCLICK 2
2 Lung governed demand valve (LGDV) 5b Pressure reducer with handwheel
2a LGDV AS (Push-to-connect) Pneumatic Options
2b LGDV AS-B 5c Warning whistle with adapter
2c LGDV AE (M 45x3) 6a Buddy breather
2d LGDV ESA 6b QuickFill
3 Backplate 7a SingleLine SCOUT
Backplate Accessories 7b Combination gauge
3a Bumper 7c Manifold with gauge
3b Swivel only attachment for hip belt 8 Cylinder
3c Swivel and height adjustment attachment for hip belt
4a Basic harness
4b Advanced harness
4c eXXtreme harness
Harness Accessories
4d Rescue handle
4e Chest strap
4f Attachment point
4g LGDV retainer
4h Tunnel (eXXtreme harness)
Fig. 4 G1 Facepiece

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Description
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M1 Modular SCBA System
2.2 Pneumatics
2.2.1 Pressure Reducer
The pressure reducer reduces the cylinder pressure to medium pressure, which will be further
reduced by the LGDV to a pressure that is respirable by the user. The pressure reducer incorpo-
rates a fail safe design which ensures air flow to the user in the event of a malfunction within the
pressure reducer.
The pressure reducer incorporates a medium pressure relief valve, and a cylinder connector with
a sinter filter to capture particulates that may be in the air stream.
The pressure reducer is marked with a serial number, a material number, a QR code, the CE
marking and the month and year of manufacture (MM/YY).
For the non-electronic configuration, the pressure reducer can be connected to a manifold
containing a pressure gauge (showing the cylinder pressure), a warning whistle for low pressure
alarm and a connector for the LGDV (SL configuration). The pressure reducer can also be
connected to a high pressure hose with standard pressure gauge and a separate medium pres-
sure hose with LGDV (classic configuration). The warning whistle for low pressure alarm can be
directly connected at the pressure reducer or equipped with a hose to the upper end of the back-
plate.
For the electronic configuration, the pressure reducer is connected to the SingleLine SCOUT.
Fig. 5 Pressure reducer
Primary Low Pressure Warning Device
The primary low pressure warning device is an acoustic warning device (signal whistle). It triggers
a continuous warning signal when the cylinder pressure drops below 55 5 bar.
Depending on pneumatics, the low pressure warning device can be located at the M1 pressure
reducer next to the cylinder, connected to a hose on the upper back of the user (Fig. 6) or within
a SingleLine (SL) manifold (Fig. 7).
Fig. 6 Warning whistle with signal line at
pressure reducer Fig. 7 Example of SL manifold
1 Warning whistle
1
1

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Description
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M1 Modular SCBA System
2.2.2 Manifolds
Non-Electronic Configuration
Fig. 8 Combination gauge
Fig. 9 Standard manifold assembly
1 Pressure gauge 3 Warning whistle
2 Second connection (optional) 4 Lung governed demand valve coupling
1 Pressure gauge 3 Warning whistle
2 Lung governed demand valve coupling
3
4
2
1
1
2
3

12
Description
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M1 Modular SCBA System
Electronic Configuration
Fig. 10 Overview SingleLine SCOUT
For more information, see SingleLine SCOUT operating manual.
1 Second connection (optional) 6 Battery life indication
2 Pressure gauge 7 Warning device (warning whistle)
3 Pressure gauge lightning 8 Lung governed demand valve coupling
4 Buddy lights 9 Alarm button
5 Sound channel & safety key holder with safety
key (left)
10 Data transmission active
1
2
3
4
6
7
8
3
9
4
5
10
5

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Description
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M1 Modular SCBA System
2.2.3 Lung Governed Demand Valve (LGDV)
The M1 SCBA can be used with the following lung governed demand valves:
For more information, see LGDV operating manual.
2.2.4 Cylinders
The cylinder stores high pressure air which will be reduced to provide the user with breathable air.
Cylinders are available in multiple sizes. The cylinder valve provides the user the ability to supply
the pressure to the rest of the system. The cylinder valve has a handwheel for opening and closing
the valve and a threaded high pressure connection according to EN 144.
2.2.5 alphaCLICK 2
Optionally, an alphaCLICK 2 quick connection is available. In this case, the pressure reducer is
equipped with the male part of the coupling. The female part (alphaCLICK 2 cylinder adapter) is
screwed into the cylinder valve. When using the alphaCLICK 2 cylinder adapter, MSA recom-
mends to equip the cylinder valve with an excess flow valve.
2.2.6 Medium Pressure Lines
The compressed air breathing apparatus can be equipped with additional connections for medium
pressure:
• Medium pressure line with one coupling (used as main medium pressure line in classic config-
uration and rescue hose)
• Rescue line with buddy breather and flushing function
• Medium pressure line with Y-piece to connect one main LGDV and one LGDV for
rescue operations (used in classic configuration instead of medium pressure line with one
coupling)
• External medium pressure line (cascade hose on the hip belt with non-return valve)
Fig. 11 M1-AE LGDV M45x3 Fig. 12 M1-AS LGDV
Fig. 13 M1-ESA LGDV Fig. 14 M1-AS-B LGDV

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Description
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M1 Modular SCBA System
2.2.7 High Pressure Lines
QuickFill
The QuickFill coupling can be used to recharge the cylinder in extraordinary situations while it is
attached to the SCBA. The coupling can only be used for filling the cylinder(s) of the SCBA. The
SCBA itself cannot be used for filling other devices.
Fig. 15 QuickFill
The QuickFill coupling is a male QuickFill inlet for use by Rapid Intervention Teams for emergency
filling operations. The system also includes an automatically resetting pressure relief valve.
For more information, see QuickFill operating manual.
2.2.8 Accessories
The following pneumatics accessory is available:
• RespiHOOD

15
Description
GB
M1 Modular SCBA System
2.3 Harness and Carrier Assembly
The harness and carrier assembly consists of:
• Backplate (carrying the pressure reducer)
• Cylinder support to hold the cylinder and hoses
• Shoulder pads
• Adjustable pull straps
• Hip belt
• LGDV retainer (optional)
2.3.1 Harness Configurations
The harness is available in three versions:
• Basic - The basic harness (with plastic or metal buckles available) does not include any
padding and can only be used together with the basic hip belt.
Fig. 16 Basic harness
• Advanced - The advanced harness (with plastic or metal buckles available) includes an addi-
tional padding.
Fig. 17 Advanced harness

16
Description
GB
M1 Modular SCBA System
• eXXtreme - The eXXtreme harness (with metal buckles) includes an additional padding and a
strong basic layer for high temperature environment (e.g. high heat training).
Fig. 18 eXXtreme harness
• eXXtreme tunnel - The eXXtreme harness can be equipped with an additional tunnel to protect
the harness and the hoses against high temperature and flames (e.g. high heat training).
Fig. 19 eXXtreme harness tunnel (left and right)

17
Description
GB
M1 Modular SCBA System
2.3.2 Backplate Adjustment Options
The backplate offers three adjustment options:
• Basic option - This option provides a fixed position. It is a non-swivel unit that provides a lower
profile and light weight option for the user.
• Swivel option - This option provides a swivel feature to allow it to move with the user and to
keep it in the center of the back of the user.
• Height adjustment and swivel option - The backplate with height adjustment and swivel option
provides the user three positions for ideal comfort. The hip belt position can be adjusted by
hand. This option also provides a swivel feature to allow it to move with the user.
2.3.3 Cylinder Strap (Cylinder Configuration)
There are cylinder straps of different lengths for securing one or two compressed air cylinders with
metal or plastic buckles. The twin cylinder option does include a metal bracket to separate the
cylinders for better retention.
2.3.4 Accessories
The following accessories for the harness and carrier assembly are available:
• Chest strap
• Attachment points for accessories
• alphaBELT
• Rescue handle - The rescue handle is used in rescue operations to pull the non-moving wearer
of the SCBA out of a dangerous zone.
• Bumper - The bumper prevents the device from being damaged in the event that it is put down
heavily.
Fig. 20 Basic Fig. 21 Swivel Fig. 22 Height adjustment and swivel
Fig. 23 Single cylinder strap Fig. 24 Twin cylinder strap

18
Visual Inspections
GB
M1 Modular SCBA System
3 Visual Inspections
For inspection intervals of the device see chapter 8.1. Conduct a visual inspection upon receipt.
WARNING!
Do NOT examine the SCBA before it is decontaminated, cleaned, and disinfected if there is a
risk of exposure to hazardous contaminants. Obey the applicable decontamination proce-
dures, clean and disinfect the SCBA first, then examine it.
If the SCBA shows damage, deterioration, or any of the conditions listed in the Visual Inspec-
tions section, remove the SCBA from service and return it to an MSA trained and certified
repair technician.
Never substitute, modify, add, or omit parts. Use only exact replacement parts in the configu-
ration as specified by MSA.
Failure to obey these warnings can result in serious personal injury or death.
WARNING!
If the SCBA shows any of the conditions listed in the Visual Inspections section, remove the SCBA
from service. Make sure an MSA trained and certified repair technician corrects the unsatisfactory
condition before returning the SCBA to service.
Failure to follow this warning can result in serious personal injury or death.
WARNING!
Never substitute, modify, add, or omit parts. Use only exact replacement parts in the configuration
as specified by MSA.
Failure to follow this warning can result in serious personal injury or death.
All Components
(1) Inspect all components for deterioration, dirt, cracks, debris, tears, holes, stickiness, signs of
heat or chemical related damage or other visible signs of damage.
(2) Inspect all straps (shoulder straps, pull straps, hip belt, waist straps, full face mask head
harness) for tears, cuts, wear, abrasion, missing buckles or straps.
(3) Perform all component specific inspections listed below.
3.1 Cylinder
(1) Check the test date on the cylinder approval sticker located on the cylinder neck or on the
cylinder label.
a) Observe national regulations for inspection intervals.
Make sure that the cylinder in use is approved as part of the MSA M1 SCBA system and fulfills all
requirements to be in operation according to the cylinder manual and relevant national regula-
tions.

19
Functional Tests
GB
M1 Modular SCBA System
4 Functional Tests
WARNING!
If the SCBA does not operate correctly for all functional tests, remove the SCBA from service.
Make sure an MSA trained and certified repair technician corrects the unsatisfactory condition
before returning the SCBA to service. Failure to obey this warning can result in serious personal
injury or death.
If the SCBA has passed the visual inspection successfully, conduct the functional tests.
If any part of the SCBA fails the functional test, do not use the SCBA and return the device to a
certified repair technician.
NOTE: The functional checks must be conducted with a full cylinder. Before starting the tests,
check the pressure gauge on the cylinder valve to verify that the cylinder is full.
4.1 Tightness Check of the Pressure Reducer
(1) Connect compressed air cylinder (see chapter 7.2 "Changing the Cylinder").
(2) Open cylinder valve and check operating pressure on pressure gauge.
The pressure value must read minimum 270 bar for 300 bar cylinders.
(3) Close cylinder valve.
After 60 seconds the pressure drop in the pressure gauge must not exceed 10 bar.
(4) Check warning device:
a) Connect LGDV.
b) Pressurize the system by opening the cylinder valve.
c) Close the cylinder valve.
d) Observe the pressure gauge.
e) Activate flushing mode of lung governed demand valve, releasing all air pressure.
Warning must sound at 55 bar ± 5 bar for a 300 bar system.

20
Donning
GB
M1 Modular SCBA System
5 Donning
WARNING!
Before entering the hazardous area, the device must be put on.
Before entering the hazardous area, check the M1 electronic devices for mechanical damage.
If the SCBA does not function properly as described in this section, the SCBA must be
removed from service and must be checked and corrected for proper operation by an MSA
trained or certified repair person before using.
The full face mask may not seal properly with your face if you have a beard, gross sideburns
or similar physical characteristics. An improper facial seal may allow contaminants to leak into
the full face mask, reducing or eliminating respiratory protection. Do not use this device if such
conditions exist.
The full face mask seal must be checked before each use.
A nosecup must be installed in the full face mask.
In order to guarantee a proper fit for those wearing glasses, a spectacle kit must be worn since
ordinary glasses cannot be worn under the full face mask.
Never remove the full face mask except in a safe, non-hazardous, non-toxic atmosphere.
Users must wear suitable protective clothing and precautions must be taken so that the device
is not exposed to atmospheres that may be harmful to it.
Failure to follow these warnings can result in serious personal injury or death.
5.1 Preparation
The device must have passed all visual inspections and functional tests (see previous chapters)
before use.
(1) Ensure that the cylinder is fully pressurized.
(2) Check cylinder connection:
Threaded connect:
Check that the handwheel is hand-tight (no tools).
alphaCLICK 2 (Quick connect):
Ensure secure connection by pulling on quick connect coupling.
(3) Pull on the cylinder strap assembly to ensure the cylinder strap is attached securely.
(4) Fully extend the shoulder straps and the hip belt.