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TECHNICAL MANUAL

OPERATION AND MAINTENANCE MANUALWITH ILLUSTRATED PARTS BREAKDOWN

ORGANIZATIONAL LEVEL

SELF-CONTAINED BREATHING APPARATUS

BREATHING AIR CHARGING SYSTEM (SCBA BACS)

0910-LP-103-6441

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

PUBLISHED BY DIRECTION OF THE COMMANDER, NAVAL SEA SYSTEMS COMMAND

0 9 1 0 L P 1 0 3 6 4 4 1

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TECHNICAL MANUAL

OPERATION AND MAINTENANCE MANUALWITH ILLUSTRATED PARTS BREAKDOWN

ORGANIZATIONAL LEVEL

SELF-CONTAINED BREATHING APPARATUS

BREATHING AIR CHARGING SYSTEM (SCBA BACS)

0910-LP-103-6441

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

PUBLISHED BY DIRECTION OF THE COMMANDER, NAVAL SEA SYSTEMS COMMAND

28 AUGUST 2004

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INSERT LATEST CHANGE PAGES. DESTROY SUPERCEDED PAGES.

NOTE: The portion of the text affected by the changes is indicatedby a vertical line in the outer margins of the page. Changesto illustrations are indicated by miniature pointing hands.

Dates of issue for original and changed pages are:

Original .........0 ...................12 January 1998

Revision ........1 ....................28 August 2004

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TABLE OF CONTENTS

Section Page

LIST OF ILLUSTRATIONS............................................................................................................................iv

LIST OF TABLES .............................................................................................................................................. v

FOREWORD.....................................................................................................................................................vii

ABBREVIATIONS AND ACRONYMS..........................................................................................................ix

SAFETY SUMMARY .......................................................................................................................................xi

CHAPTER 1 INTRODUCTION AND SAFETY PRECAUTIONS.......................................................... 1-1

1.1 INTRODUCTION........................................................................................................................... 1-1

1.1.1 Purpose ................................................................................................................................ 1-1

1.1.2 Scope................................................................................................................................... 1-1

1.2 SYSTEM DESCRIPTION .............................................................................................................. 1-1

1.3 SPECIFICATIONS ......................................................................................................................... 1-2

1.4 SAFETY PRECAUTIONS.............................................................................................................. 1-31.4.1 Standard Safety Precautions................................................................................................ 1-4

1.4.2 General Safety Instructions ................................................................................................. 1-4

1.4.3 Warnings, Cautions, And Notes .......................................................................................... 1-4

1.4.4 Special Precautions.............................................................................................................. 1-4

1.5 EQUIPMENT AND ACCESSORIES SUPPLIED ......................................................................... 1-4

1.6 REFERENCE PUBLICATIONS NOT SUPPLIED........................................................................ 1-5

1.7 EQUIPMENT ACCEPTANCE....................................................................................................... 1-6

1.7.1 Inventory ............................................................................................................................. 1-6

1.7.2 Maintenance Verification.................................................................................................... 1-6

1.7.3 Inspection ............................................................................................................................ 1-6

1.8 INITIAL OPERATIONAL TEST................................................................................................... 1-6

1.9 STORAGE REQUIREMENTS....................................................................................................... 1-6

CHAPTER 2 OPERATION.......................................................................................................................... 2-1

2.1 INTRODUCTION........................................................................................................................... 2-1

2.2 CONTROLS AND INDICATORS ................................................................................................. 2-1

2.3 OPERATING PROCEDURES........................................................................................................ 2-6

2.3.1 Setup.................................................................................................................................... 2-6

2.3.2 Operation............................................................................................................................. 2-7

2.3.3 Disassembly....................................................................................................................... 2-10

2.3.4 Emergency Operation........................................................................................................ 2-10

CHAPTER 3 FUNCTIONAL DESCRIPTION ........................................................................................... 3-1

3.1 INTRODUCTION........................................................................................................................... 3-1

3.2 DESCRIPTION............................................................................................................................... 3-2

3.2.1 ABPA .................................................................................................................................. 3-2

3.2.1.1 Drive Air Inlet Pressure Gauge (AHP G201) ........................................................ 3-2

3.2.1.2 Drive Air Regulator (AHP-V201).......................................................................... 3-2

3.2.1.3 Regulated Air Pressure Gauge (ALP-G202).......................................................... 3-2

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TABLE OF CONTENTS (Continued)

Section Page

3.2.1.4 Drive Air Filter .......................................................................................................3-2

3.2.1.5 Drive Air Relief Valve (ALP-V202) ......................................................................3-2

3.2.1.6 Drive Air Bleed Valve (ALP-V204).......................................................................3-2

3.2.1.7 Drive Air Control Valve (ALP-V203)....................................................................3-2

3.2.1.8 Filtered Air Inlet Pressure Gauge (AHP-G204)......................................................3-3

3.2.1.9 Filtered Air Inlet Valve (AHP-V206).....................................................................3-3

3.2.1.10 Booster Pump........................................................................................................3-3

3.2.1.11 Surge Tank............................................................................................................3-4

3.2.1.12 Filtered Air Relief Valve (AHP-V207).................................................................3-4

3.2.1.13 Pilot Switch (AHP-V205).....................................................................................3-4

3.2.1.14 In-Line Filter.........................................................................................................3-43.2.1.15 Filtered Air Outlet Pressure Gauge (AHP-G203).................................................3-4

3.2.2 HPFA....................................................................................................................................3-4

3.2.2.1 Coalescor Filter.......................................................................................................3-4

3.2.2.2 Relief Valve (AHP-V304) ......................................................................................3-4

3.2.2.3 Check Valve (AHP-V303)......................................................................................3-4

3.2.2.4 Cartridge Holders....................................................................................................3-4

3.2.2.5 Manifold .................................................................................................................3-4

3.2.2.6 H2O/CO Indicator ...................................................................................................3-4

3.2.2.7 HPFA Indicator (AHP-G301).................................................................................3-4

3.2.2.8 In-Line Filters .........................................................................................................3-43.2.2.9 Shutoff Valve (AHP-V301)....................................................................................3-4

3.2.2.10 Bleed Valve (AHP-V302).....................................................................................3-5

3.2.2.11 Drain Valve (AHP-V305).....................................................................................3-5

3.2.3 Connecting Hose Assemblies...............................................................................................3-5

3.2.3.1 Drive Air Hose Assembly.......................................................................................3-6

3.2.3.2 Filtered Air Hose Assembly ...................................................................................3-6

3.2.3.3 Filtered Air Supply Hose Assembly .......................................................................3-6

3.2.3.4 Quick-Charge Wand ...............................................................................................3-6

CHAPTER 4 SCHEDULED MAINTENANCE ..........................................................................................4-1

4.1 INTRODUCTION............................................................................................................................4-1

4.2 SCOPE .............................................................................................................................................4-1

4.3 SAFETY REQUIREMENTS...........................................................................................................4-1

4.4 MAINTENANCE CONCEPT .........................................................................................................4-1

4.4.1 Scheduled Maintenance........................................................................................................4-1

4.4.2 Unscheduled Maintenance ...................................................................................................4-2

4.5 PLANNED MAINTENANCE SYSTEM ........................................................................................4-2

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Section Page

4.6 UNITED STATES NAVY MAINTENANCE AND MATERIAL MANAGEMENT SYSTEM

COVERAGE AND PROBLEM REPORTING .............................................................................. 4-2

4.7 GENERAL MAINTENANCE INSTRUCTIONS .......................................................................... 4-3

4.7.1 Equipment Disassembly and Parts Replacement................................................................. 4-3

4.7.1.1 Bagging Components............................................................................................. 4-3

4.7.2 General Cleaning Procedure................................................................................................ 4-4

4.7.3 Leak Detection .................................................................................................................... 4-4

4.7.4 Anti-seize Tape.................................................................................................................... 4-4

4.7.5 Lubricants............................................................................................................................ 4-4

4.7.6 O-Rings ............................................................................................................................... 4-4

4.7.6.1 O-Ring Removal .................................................................................................... 4-44.7.6.2 O-Ring Installation................................................................................................. 4-4

CHAPTER 5 TROUBLESHOOTING......................................................................................................... 5-1

5.1 INTRODUCTION........................................................................................................................... 5-1

5.2 GENERAL TROUBLESHOOTING INSTRUCTIONS................................................................. 5-1

CHAPTER 6 CORRECTIVE MAINTENANCE ....................................................................................... 6-1

6.1 INTRODUCTION........................................................................................................................... 6-1

6.1.1 Scope................................................................................................................................... 6-1

6.1.2 Safety Requirements............................................................................................................ 6-1

6.2 GENERAL MAINTENANCE INFORMATION ........................................................................... 6-1

6.2.1 Maintenance Parts ............................................................................................................... 6-26.2.2 Related Maintenance ........................................................................................................... 6-2

6.3 TEST EQUIPMENT AND TOOLS................................................................................................ 6-2

6.4 MATERIALS REQUIRED............................................................................................................. 6-3

6.5 GENERAL MAINTENANCE PROCEDURES ............................................................................. 6-3

6.5.1 System Tightness Test......................................................................................................... 6-3

6.5.1.1 ABPA Tightness Test ............................................................................................ 6-3

6.5.1.2 HPFA Tightness Test ............................................................................................. 6-4

6.6 ABPA CORRECTIVE MAINTENANCE...................................................................................... 6-5

6.6.1 Booster Pump Removal and Installation............................................................................. 6-5

6.6.2 Drive Air Regulator (AHP-V201) Removal and Installation.............................................. 6-9

6.6.3 Drive Air Relief Valve (ALP-V202) Removal and Installation........................................ 6-13

6.6.4 Drive Air Control Valve (ALP-V203) Removal and Installation ..................................... 6-15

6.6.5 Drive Air Bleed Valve (ALP-V204) Removal and Installation ........................................ 6-17

6.6.6 Pilot Switch (AHP-V205) Removal and Installation ........................................................ 6-19

6.6.7 Filtered Air Inlet Valve (AHP-V206) Removal and Installation....................................... 6-21

6.6.8 Surge Tank and Filtered Air Relief Valve (AHP-V207) Removal and Installation.......... 6-24

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6.6.9 Drive Air Inlet Pressure Gauge (AHP-G201), Regulated Air Pressure Gauge (AHP-G202),

and Filtered Air Inlet Pressure Gauge (AHP-G204) Removal and Installation.................6-26

6.6.10 Filtered Air Outlet Pressure Gauge (AHP-G203) Removal and Installation ...................6-28

6.6.11 Drive Air Filter Removal and Installation........................................................................6-30

6.6.12 In-Line Filter Removal and Installation...........................................................................6-31

6.6.13 Spooler Valve Assembly Removal and Installation.........................................................6-32

6.7 HPFA Corrective Maintenance ......................................................................................................6-36

6.7.1 Bleeding HPFA ..................................................................................................................6-37

6.7.2 Filter Removal and Installation..........................................................................................6-37

6.7.3 Shut Off Valve (AHP-V301) Removal and Installation.....................................................6-38

6.7.4 Check Valve (AHP-V303) Removal and Installation ........................................................6-406.7.5 Drain Valve (AHP-V305) Removal and Installation .........................................................6-41

CHAPTER 7 ILLUSTRATED PARTS BREAKDOWN ............................................................................7-1

7.1 INTRODUCTION............................................................................................................................7-1

7.2 PARTS LISTS AND ILLUSTRATIONS ........................................................................................7-1

7.3 LIST OF MANUFACTURERS.......................................................................................................7-1

APPENDIX A OPERATIONAL CHECKLISTS .......................................................................................A-1

A-1 INTRODUCTION..........................................................................................................................A-1

A-2 CHECKLISTS PROVIDED ..........................................................................................................A-1

LIST OF ILLUSTRATIONS

Figure Page

1-1 SCBA BACS ............................................................................................................................... 1-2

2-1 Air Booster Pump Assembly (ABPA) Controls and Indicators .................................................. 2-22-2 High-Pressure Filter Assembly (HPFA) Controls and Indicators ............................................... 2-3

2-3 Filtered Air Supply Hose Assembly (H-103) Controls and Indicators........................................ 2-4

2-4 Inlet/Outlet Connection Points..................................................................................................... 2-5

3-1 SCBA BACS Functional Schematic and Flow Diagram............................................................. 3-13-2 Air Booster Pump Assembly (ABPA)......................................................................................... 3-3

3-3 High Pressure Filter Assembly (HPFA) ...................................................................................... 3-56-1 Booster Pump............................................................................................................................... 6-8

6-2 Drive Air Regulator (AHP-V201) ............................................................................................. 6-10

6-3 Drive Air Relief Valve (ALP-V202) ......................................................................................... 6-146-4 Drive Air Control Valve (ALP-V203)....................................................................................... 6-15

6-5 Drive Air Bleed Valve (ALP-V204).......................................................................................... 6-18

6-6 Pilot Switch (AHP-V205).......................................................................................................... 6-19

6-7 Filtered Air Inlet Valve (AHP-V206)........................................................................................ 6-22

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LIST OF ILLUSTRATIONS (Continued)

Figure Page

6-8 Surge Tank with Filtered Air Relief Valve (AHP-V207).......................................................... 6-25

6-9 Drive Air Inlet Gauge (AHP-G201), Regulated Air Pressure Gauge (ALP-G202), and Filtered

Air Inlet Pressure Gauge (AHP-G204) ..................................................................................... 6-27

6-10 Filtered Air Outlet Pressure Gauge (AHP-G203).................................................................... 6-296-11 Drive Air Filter ........................................................................................................................ 6-30

6-12 In-Line Filter............................................................................................................................ 6-32

6-13 Tube Assembly........................................................................................................................ 6-336-14 Banjo Fitting Hex Nut ............................................................................................................. 6-34

6-15 Spooler Valve Assembly ......................................................................................................... 6-346-16 Spooler Valve Installation and Removal Tool ........................................................................ 6-35

6-17 Spooler Valve Sleeve............................................................................................................... 6-35

6-18 Filter......................................................................................................................................... 6-386-19 Shutoff Valve (AHP-V301)..................................................................................................... 6-39

6-20 Check Valve (AHP-V303)....................................................................................................... 6-41

6-21 Drain Valve (AHP-V305)........................................................................................................ 6-427-1 ABPA (Sheet 1 of 4)..................................................................................................................... 7-2

7-2 HPFA (Sheet 1 of 2) .................................................................................................................... 7-9

LIST OF TABLES

Table Page

1-1 SCBA BACS Specifications........................................................................................................ 1-31-2 Equipment and Accessories Supplied.......................................................................................... 1-5

1-3 Reference Publications Not Supplied .......................................................................................... 1-5

4-1 SCBA BACS Planned Maintenance System............................................................................... 4-2

5-1 ABPA Troubleshooting Guidelines............................................................................................. 5-15-2 HPFA Troubleshooting Guidelines ............................................................................................. 5-4

6-1 Tools Required ............................................................................................................................ 6-2

6-2 Materials Required ...................................................................................................................... 6-37-1 ABPA Parts List .......................................................................................................................... 7-6

7-2 HPFA Parts List......................................................................................................................... 7-11

7-3 Drive Air Hose Assembly Parts List ......................................................................................... 7-137-4 Filtered Air Hose Assembly Parts List ...................................................................................... 7-14

7-5 Filtered Air Supply Hose Assembly Parts List.......................................................................... 7-15

7-6 List of Manufacturers ................................................................................................................ 7-16A-1 Setup Checklist .......................................................................................................................... A-3

A-2 Operation Checklist ................................................................................................................... A-5

A-3 Disassembly Checklist............................................................................................................... A-9

A-4 Emergency Operation Checklist .............................................................................................. A-11

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FOREWORD

This technical manual contains procedures for operation and maintenance of the Self-Contained Breathing

Apparatus Breathing Air Charging System (SCBA BACS). The information in this manual is presented inseven chapters and one appendix, as follows:

Chapter 1 Introduction and Safety Precautions

Chapter 2 Operation

Chapter 3 Functional Description

Chapter 4 Scheduled Maintenance

Chapter 5 Troubleshooting

Chapter 6 Corrective Maintenance

Chapter 7 Illustrated Parts Breakdown

Appendix A Operational Checklists

Ships, training activities, supply points, depots, Naval Shipyards, and Supervisors of Shipbuilding are

requested to arrange for the maximum practical use and evaluation of Naval Sea Systems Command

(NAVSEA) technical manuals. The In-Service Engineering Agent (ISEA) may be contacted at Commanding

Officer, Naval Surface Warfare Center Panama City, Attn: Code E53, 110 Vernon Avenue, Panama City, FL

32407.

All errors, omissions, discrepancies, and suggestions for improvement to NAVSEA technical manuals shall be

forwarded to: Naval System Data Support Activity (NSDSA), Code 5E30, Port Hueneme Division, Naval

Surface Warfare Center.

Technical Manual Deficiency/Evaluation Report (TMDER) (formally form NAVSEA 4160/1) can now be

accessed, completed, and transmitted electronically to NSDSA. To access this form from the Internet, enter:

http://nsdsa.phdnswc.navy.mil/

At the Home Page, click on the TMDER icon. Complete the form and transmit as directed. All comments

shall be thoroughly investigated and originators will be advised of action resulting from those comments.

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ABBREVIATIONS AND ACRONYMS

3-M Maintenance and Material Management

ABPA Air Booster Pump Assembly

AHP Air High Pressure

ALP Air Low PressureAo Operational Availability

BACS Breathing Air Charging System

CAGE Commercial and Government Entity

CGA Compressed Gas Association

CIN Course Identification Number

CO Carbon Monoxide

FEDLOG Federal Logistics Record

H2O Water

HP High Pressure

HPFA High-Pressure Filter AssemblyIPB Illustrated Parts Breakdown

ISEA In-Service Engineering Agent

MDS Maintenance Data Sheet

METCAL Metrology and Calibration

MIL-STD Military Standard

MIP Maintenance Index Page

MRC Maintenance Requirement Card

MS Military Specification

NAVOSH Navy Occupational Safety and Health

NAVSEA Naval Sea Systems Command

NID Non-ionic DetergentNSDSA Naval System Data Support Activity

NSN National Stock Number

OPNAV Office of the Chief of Naval Operations

OPNAVINST Office of the Chief of Naval Operations Instruction

PMS Planned Maintenance System

QD Quick Disconnect

SAE Society of Automotive Engineers

SCBA Self-Contained Breathing Apparatus

SCBA BACS Self-Contained Breathing Apparatus Breathing Air Charging System

SCFM Standard Cubic Feet Per MinuteSTEP Shipboard Training Enhancement Program

TMDER Technical Manual Deficiency/Evaluation Report

TSP Trisodium Phosphate

USN United States Navy

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SAFETY SUMMARY

1. GENERAL SAFETY NOTICES.

The general safety notices supplement specific warnings and cautions appearing in this manual. All general

safety notices and specific warnings and cautions must be understood and applied during all Self-Contained

Breathing Apparatus Breathing Air Charging System (SCBA BACS) operation and maintenance functions.

Should situations arise that are not covered in the general or specific safety notices, the commanding officer,

or other authority, will issue orders as deemed necessary to cover the specific situation. In addition, refer to

Office of the Chief of Naval Operations Instruction (OPNAVINST) 5100.19,Navy Occupational Safety and

Health (NAVOSH) Program Manual for Forces Afloat, Vol I/II/III or OPNAVINST 5100.23,Navy

Occupational Safety and Health (NAVOSH) Program Manualfor any situation not covered in the general or

specific safety notices.

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CHAPTER 1INTRODUCTION AND SAFETY PRECAUTIONS

1.1 INTRODUCTION.

1.1.1 Purpose. This manual contains technical information necessary to install, operate, troubleshoot, andmaintains the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS), hereinafter

referred to as BACS (Figure 1-1). Reference to additional publications is given if auxiliary manuals exist or if

lengthy procedures are required.

1.1.2 Scope. Information in this manual is presented in seven chapters and one appendix as follows:

Chapter 1,Introduction and Safety Precautions, introduces safety considerations; presents a system

description and specifications; reference data and publications; lists of equipment, accessories, and

documents supplied with each system; equipment acceptance procedures; initial operational test

procedures; and storage requirements.

Chapter 2, Operation, provides a description of SCBA controls and indicators and detailed instructions

on BACS setup, operating, and disassembly procedures. This chapter also provides BACS emergency

shutdown procedures.

Chapter 3, Functional Description, provides a detailed description of the function of each major

component of the BACS.

Chapter 4, Scheduled Maintenance, provides information required to perform scheduled and general

maintenance procedures on the BACS.

Chapter 5, Troubleshooting, provides tables to isolate BACS equipment malfunctions and direct the

user to related maintenance procedures.

Chapter 6, Corrective Maintenance, provides procedures required to perform corrective maintenance

on the BACS.

Chapter 7,Illustrated Parts Breakdown, provides illustrated parts breakdown for major components of

the BACS.

Appendix A, Operational Checklists, provides reproducible copies of checklists for BACS setup,

operating, disassembly, and emergency procedures.

1.2 SYSTEM DESCRIPTION.

The BACS (Figure 1-1) is used to recharge SCBA cylinder assemblies with breathing quality air (Grade D as

defined by Compressed Gas Association [CGA] publication G-7.1). High Pressure Filter Assemblies (HPFAs)are hard mounted to the ships bulkheads at various locations throughout the ship. The Air Booster Pump

Assembly (ABPA) and connecting hose assemblies are portable and can be moved from one HPFA filterstation to another. Personnel should become familiar with the shipboard location of all system components.

Refer to Chapter 3 for a complete functional description of the system.

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1.3 SPECIFICATIONS.

Table 1-1 lists the specifications for the BACS.

Figure 1-1. SCBA BACS.

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Table 1-1. SCBA BACS Specifications.

Equipment Specifications

SCBA BACS Specifications

o Setup Time: 15 minuteso Operational Availability (AO): 90%

Subassemblies

o High-Pressure Filter Assembly (HPFA)

o Air Booster Pump Assembly (ABPA)o Connecting Hose Assemblies

High-Pressure FilterAssembly

Specifications

o Dimensions: 9.0 in. x 11.0 in. x 28.0 in. (LxWxH)

o Weight: 68 lbo Bulkhead-mounted aluminum housing

o Filter cartridge duration: maximum usage life 6 months (shelf life 18 months)

o Produces Grade D air IAW CGA G-7.1

o High Pressure (HP) air requirements: 2,000 - 3,000 psig

o Maximum flow rate: 60 scfm (filtered air only)o Maximum operating pressure: 3,000 psig

o Relief valve (AHP-V304) setting: 3,300 psig

Air Booster Pump

Assembly Specifications

o Dimensions: 33.5 in. x 14.4 in. x 22.5 in. (LxWxH)

o Weight: 108 lbo Portable aluminum frameo HP air requirements: 2,000 - 3,000 psig

o Boosts filtered HPFA air to 4,500 psig

o Filtered air relief valve (AHP-V207) setting: 5,300 psig

o Nominal drive air pressure: 125 psigo Drive air relief valve (ALP-V202) setting: 150 psig

Connecting Hose

Assemblies

Specifications

o Drive Air/Filtered Air Hose Assemblies nominal operating pressure:3,000 psig

o Filtered Air Supply Hose Assembly nominal operating pressure: 4,500 psigo Thermoplastic hose

Components

o Drive Air Hose Assembly (H-101)o Filtered Air Hose Assembly (H-102)o Filtered Air Supply Hose Assembly (H-103)

1.4 SAFETY PRECAUTIONS.

Personnel using the BACS (Figure 1-1) shall observe the safety precautions specified in this technical manual.

Personnel must understand the potential hazards associated with the BACS before operating or performing

maintenance on the equipment. The following safety guidelines apply to operation and maintenance

procedures in general and do not appear elsewhere in this publication, except by reference. Personnel must

understand and comply with these guidelines during operation and maintenance of the BACS. The Safety

Summary includes a comprehensive list of warnings and cautions that affect the system.

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1-4

1.4.1 Standard Safety Precautions. The BACS shall be used only after personnel have been properlyinstructed and have completed the BACS Shipboard Training Enhancement Program (STEP) operation

training course. Personnel must u nd limitations. Personnel should

complete the BACS STEP maintenance training course.

P oroughly y practices the potential hazards associated

w before operat on the equipment.

1.4.2 General Safety Inst ruc

se the equipment IAW instructions, labels, a

also

ersonne

ith the BACS

l must be th familiar with all safet

ing o e

and understand

r p rforming maintenance

tions. Standard operational and maintenance safety precautions containedin the following documents apply

Forces afloat must compl erations (OPNAVINST) 5100.19,

tional S NAVOSH) Program Manual for Forces Afloat, Vol I/II/III

Shore activities must com INST 5100.23,Navy Occupational Safety and Health

(NAVOSH) Program Man

1.4.3 Warnings, Cautions, A

to the SCBA BACS:

y with Office of the Chief of Naval Op

Navy Occupa afety and Health (

ply with OPNAV

ual.

nd Notes.

The warnings, cautions, and notes st be followed to prevent

hazards to personnel and damage warnings, cautions, and notes

a the text of i

appearing throughout this technical manual mu

to equipment. The following notations define

s they are used in th s manual:

WARNING

Warnings highl dure,

practice, condit

result in injury

ight an essential operating or maintenance proce

ictly observed, couldion, or statement, which, if not str

to, or death of, personnel.

CAUTION

Cautions refer re, practice,

condition, o ich, if not strictly observed, could result in

damage to, or d ssion effectiveness, or

long-term health

NOTE

an operating or maintenance procedure, practice,

condition, or statement that is essential, but not of a known hazardous

to an operating or maintenance procedu

r statement, wh

estruction of, equipment, loss of mi

hazards to personnel.

Notes refer to

nature.

1.4.4 Special Precautions. The warnings, cautions, and notes appearing throughout this technicamust be followed to prevent hazards to personnel and damage to equipment.

1.5

l manual

EQUIPMENT AND ACCESSORIES SUPPLIED.

Table 1-2 provides a listing of the equipment and accessories that are supplied with each BACS.

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Part Number (PN)

Table 1-2. Equipment and Accessories Supplied.

Qty Item Reference Number or

1 EACH SCBA BACS Components:o

High Pressure Filter Assembly (HPFA)

1

1

PN 53

o Air Booster Pump Assembly (ABPA)

o 3)1

711ASSY7245941

PN 53711ASSY7245940

PN 53711ASSY7245948-1

o Drive Air Hose Assembly (H-101)1o Filtered Air Hose Assembly (H-102)1

Filtered Air Supply Hose Assembly (H-10

PN 53711ASSY7245944-2PN 53711ASSY7245944-1

o Quick-Charge Wand1 PN 200150-03

REF

Apparatus Breathing Air Charging System (SCBA BACS)

Planned Maintenance System (PMS) for Self-Contained Breathing MIP 5519/018

1 C

o Strap Wrench

PN 53711-7245957

PN 54325A22

EA H Special Tools:

o Spanner Wrench23

1 Quantity is ship class dependent.2

One per HPFA.3 One per ship system.

1.6 REFERENCE PUBLICATIONS NOT SUPPLIED.

Table 1-3 lists reference publications that are not supplied with each BACS.

lication Number Application

Table 1-3 Reference Publications Not Supplied.

Publication Title Pub

BACS Shipboard Training Enhancement Program(STEP) Operational Course Identification Number5-0008 Computer-based training(CIN) A49

BACS STEP Maintenance CIN A495-0039 Computer-based training

Cleaning of Ship t cleaningboard Compressed Air Systems Military Standard(MIL-STD-1622)

Componen

Commodity Spe and testing

fiberglass cylinders

cification for Air CGA G-7.1 Inspecting

Metrology and Calibration (METCAL) Program 4734.1A Calibration and

maintenance of gauges

NAVSEA

Navy Occupatio

Program Manua

nd

ce safety

nal Safety and Health (NAVOSH)

l

OPNAVINST 5100.23 Operation a

maintenan

Navy Occupatio and Health (NAVOSH) OPNAVINST 5100.19 Operation andnal SafetyProgram Manual for Forces Afloat, Vol I/II/III maintenance safety

Self-Contained Breathing Apparatus ScottAir-Pak

4.5

S6220-EN-MMO-010 Operation andmaintenance manual

Ships Maintenance and Material Management OPNAV

(3-M) Manual

INST 4790.4 (Series) Failure analysis

reporting

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EQUIPMENT ACCEP1.7 TANCE.

Upon receipt, BACS components must be inventoried and inspected. The equipment will not be ready forimm e operational use; shipboard installation is required.

1. n r

ediat

7.1 Inve to y . To ensure receipt of all items, conduct a visual inventory f all components IAW Table 1-

2. The shipment in the sh Verify allserial numbers co g lists.

1.7.2 Maintena

o

should be compared with the packing lists included ipping documentation.rrespond with the accompanying packin

nce Verification. Examine the maintenance records acco ,Maintenance Req rify that requ e has

been performed. if any, before operating the equipm

1.7.3 Inspe

mpanying shipments (e.g.

uirement Cards [(MRCs)] and logbooks) to ve ired scheduled maintenanc

Perform omitted MRCs, ent.

ction. Carefully remove each item from its packing container. Perform a thorough inspection,no di d by the packing and manufacturing process. Inspect for completeness of

assemblies, faulty cracks, corrosion, and deterioration. Check the ABPA and HPFA for

damage to the alu d control panel, and inspect the unit to ens trols and

on.

TIONAL TEST

ting any screpancies cause

workmanship, dirt,

minum frames an ure that all con

indicators are in good operating conditi

1.8 INITIAL OPERA .

a. Install filter cartridges and indicator elements IAW MIP 5519/018.

3.1.

rocedures paragraph 2.3.2.

d. Perform system tig

e. Disass IAW procedures described in paragraph 2.3.3.

1

b. Set up the BACS IAW procedures in paragraph 2.

c. Using an SCBA cylinder, conduct operational test IAW operating p

htness test IAW paragraph 6.5.1.

emble the BACS

.9 STORAGE REQUIREMENTS.

The BACS is a breathing supply support system; co e handled and stor

B repar ng-term storage

Lay-up SCBA Breathing Air Charging System. Gen rage precautions are listed as follows:

peratures higher than F (48.8C) or lower t

ight; s rubber compo

en

co en stored.

mponents must b ed with care. If the

ACS will not be used for 90 days or longer, p e the system for lo

eral long-term sto

IAW MRC LU-1,

Do not store components in tem 120 han 0F (-17C).

Do not store components in direct sunl sunlight deteriorate nents.

Ensure components are dry and clean wh stored.

Ensure flexible parts are not subjected to ntinuous distortion wh

Ensure storage area is well-ventilated.

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CHAPTER 2

2.1 INTRODUCTION

OPERATION

.

A description and illustration of the controls and indicators of the Self-Contained Breathing Apparatus

mergency operation

procedures. Checklists for these procedures are provided in Appendix A.

This chapter contains the following information:

Breathing Air Charging System (SCBA BACS); hereinafter referred to as BACS.

Operational use procedures providing setup, operation, disassembly, and e

2.2 CONTROLS AND INDICATORS.

Controls and indicators for the Air Booster Pump Assembly (ABPA), the High Pressure Filter Assemb

(HPFA), and the Filtered Air Supply Hose A

ly

ssembly (H-103) are illustrated in Figures 2-1 through 2-3. The

following information is provided for each illustration:

Number identifies corresponding callout

Nomenclature item name

Function provides brief description of function of item

Normal Operating Condition describes position of item during operational use or identifies

g hose assemblies.

maximum psig reading.

Figure 2-4 illustrates the connection points for correct attachment of the connectin

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No. Nomenclature FunctionNormal Operating

Condition

1 Filtered Air Outlet Pressure Gauge

(AHP-G203)

Indicates charging air pressure 4,500 psig

2 Filtered Air Inlet Pressure Gauge

(AHP-G204)

Indicates pressure from the HPFA 3,000 psig

3 Drive Air Bleed Valve

(ALP-V204)

Releases remaining drive air when charging is

complete

Closed

4 Regulated Air Pressure Gauge

(ALP-G202)

Indicates reduced drive air pressure after drive air

has been regulated

125 psig

5 Drive Air Inlet Pressure Gauge(AHP-G201)

Indicates drive air pressure from HPFA 3,000 psig

6 Filtered Air Inlet Valve(AHP-V206) Controls high-pressure filtered air from HPFA Open

7 Drive Air Control Valve

(ALP-V203)

Controls drive air flow to booster pump from

HPFA

Open

8 Drive Air Regulator

(AHP-V201)

Regulates drive air pressure from HPFA 125 psig

Figure 2-1. Air Booster Pump Assembly (ABPA) Controls and Indicators.

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No. Nomenclature FunctionNormal Operating

Condition

1 HPFA Indicator (AHP-G301) Indicates air pressure in cartridge holders and

manifold block

3,000 psig

2 Shutoff Valve (AHP-V301) Stops air flow to ABPA Open

3 Bleed Valve (AHP-V302) Bleeds air pressure in HPFA Closed

4 Drain Valve (AHP-V305) Drains moisture from coalescor Closed

5 H2O/CO Indicator Indicates presence of water (H2O) or carbon

monoxide (CO) in breathing air

Blue (H2O) and

yellow (CO)

6 Relief Valve (AHP-V304) Protects HPFA from over-pressurization Closed

Figure 2-2. High-Pressure Filter Assembly (HPFA) Controls and Indicators.

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No. Nomperating

Conditionenclature Function

Normal O

1 Shutoff Knob, Hose Isolation Va

(AHP-V101, A

lve

HP-V102)*

ssembly

(H-103)

Shutoff for Filtered Air Supply Hose A Closed

2 Bleed Handle, Hose Isol(AHP-V101, A

ation ValveHP-V102)* Supply Hose Assembly (H-103)

Bleeds filtered air supply from Filtered Air Closed

* B A 2 refer to the

Fig s.

oth HP-V101 and AHP-V10 Hose Isolation Valve.

ure 2-3. Filtered Air Supply Hose Assembly (H-103) Controls and Indicator

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Figu ts.re 2-4. Inlet/Outlet Connection Poin

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3 OPERATING PROCEDURES2. .

ragraphs 2.3.1 through 2.3.4 address the following procedures: setup, operation, disassembly, andergency operations. Appendix A provides corresponding checklists to be copied and used as needed.

2.3.1 Setup

Paem

. The Setup Checklist (Table A-1) should be completed when the following procedures are

performed.

a. Move ABPA within 5 to 7 feet of HPFA.

b. Ensure ship high-pressure (HP) air system valve is closed.

WARNING

A color change from blue to pink in the H2O/CO indicator reveals high

moisture content; a color change from yellow to brown indicates a high

CO content. Any color change requires replacement of filter cartridges

and indicator elements to avoid serious injury or death to personnel.

c. Check HPFA H2O/CO indicator for appropriate colors.

d. Ensure HPFA shutoff valve (AHP-V301) and drain valve (AHP-V305) are closed.

WARNING

Before opening bleed valves, ensure all personnel stand clear to avoid

serious injury or death from flying debris. Operator shall announce

BLEEDING DOWN to warn nearby personnel. Operator must wear

protective eyewear and hearing protection to prevent personal injury.

e. Open HPFA bleed valve (AHP-V302). Bleed pressure; close valve.

CAUTION

Ensure hoses are routed to avoid equipment damage.

f ve PA ir inlet

att

g ere d AB ed air inletes, and atta

ose Assembly (H-103) to ABPA filtered air

supply.

i. Ensure Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102)

sh

. Remove dust caps, connect dri

quick-disconnect sockets, and

air hose assembly (H-101) to HPFA and AB

ach snap shackles to eye nuts.

drive a

. Remove dust caps, connect filtquick-disconnect nippl

d air hose assembly (H-102) to HPFA anch snap shackles to eye nuts.

PA filter

h. Remove dust caps and connect Filtered Air Supply H

utoff knobs and bleed handles are closed.

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3.2 Operation2. . The Operation Checklist (Table A-2) should be completed when the following proceduresmed.

WARNING

are perfor

Before operating the BACS, ensure that a gas sample has been takenwithin the last three months IAW Maintenance Requirements Cards

(MRC) Q-1 to ensure that Grade D air quality, as defined by CGA G-7.1,

is being produced to avoid serious injury or death to personnel.

a. Ensure ABPA drive air regulator (AHP-V201) is fully unloaded by rotating counterclockwise.

b. Ensure ABPA drive air control valve (ALP-V203), drive air bleed valve (ALP-V204), and filtered

air inlet valve (AHP-206) are closed.

c. Slowly open ship HP air system supply valve.

d. Turn HPFA shutoff valve (AHP-V301) fully counterclockwise, then back off valve 1/4 turn.

e. Adjust ABPA drive air regulator (AHP-V201) until regulated air pressure gauge (ALP-G202) reads

125 5 psig.

NOTE

The system can be configured to charge the following: (1) one or two

SCBA cylinders, (2) one or two quick-charge wands, or (3) one SCBA

cylinder and one quick-charge wand.

f. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly(ies) and/or quick-

charge wand(s) supplied with SCBAs.

WARNING

Do not refill any SCBA cylinder assembly that is damaged. Failures to

inspect, depressurize, and remove a damaged SCBA cylinder assembly

may result in serious injury or death to personnel.

g. Prior to charging an SCBA cylinder assembly, inspect entire SCBA or SCBA cylinder assembly for

evidence of exposure to chemicals, high temperature, impact damage, or worn components.

NOTE

If quick-charge wands are used, proceed to step s.

h. Open SCBA cylinder(s) valve fully by rotating counterclockwise, then back off valve 1/4 turn.

Filtered air outlet pressure gauge (AHP-G203) will indicate SCBA cylinder pressure.

NOTE

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se Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102)

shutoff knobs for each SCBA cylinder assembly connected.

essure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to sixcomplete turns.

NOTE

inutes to

vent moisture during charging evolution.

l. When air booster pump stops or SCBA dual-reading pressure indicator reads approximately

4,500 psig, close Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-101/

AHP

i. Open Filtered Air Supply Ho

j. Open ABPA filtered air inlet valve (AHP-V206).

k. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet

pr

Open HPFA drain valve (AHP-V305) approximately every 15 m

-V102) shutoff knob(s).

WARNING





m. Close each SCBA cylinder valve fully; y Hose Assembly (H-103) hose

isolation valves (AHP-V101/AHP-V102) bleed handle(s) to bleed air between each SCBA cylinder

assem bleed

handl

n. Disco er assembly. If

mission is complete, proceed to step y. If not, continue with next step.

o. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly.

p. Open each SCBA cylinder valve fully, k off valve 1/4 turn.

q. Open Filtered A HP-V101/AHP-V102)

shutoff knob(s) for each SCBA cylinder assembly connected.

r. plete, proceed to step y.

open Filtered Air Suppl

bly and the corresponding hose isolation valve (AHP-V101/AHP-V102). Close

e(s).

nnect Filtered Air Supply Hose Assembly (H-103) from each SCBA cylind

and then bac

ir Supply Hose Assembly (H-103) hose isolation valves (A

As needed, repeat procedure beginning with step l. When mission is com

CAUTION

Ensure hoses are routed to avoid equipment damage.

s. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102)

t. Open ABPA filtered air inlet valve (AHP-V206).

shutoff knob(s) for each quick-charge wand connected in step f.

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ure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six

complete turns counterclockwise.

v. Connect a quick-charge wand to each

w. As each SCBA is filled, di

x. Repe

y. Close

u. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet

press

SCBA.

sconnect quick-charge wand.

at steps v and w as needed. When mission is complete, proceed to step y.

ship HP air system valve.

WARNING


ebris. Operator shall announce


ated air pressure gauge (ALP-G202) and drive air inlet

pressure gauge (AHP-G201) should read zero.

z. Slow 204). Bleed

drive

aa. Close HPFA shutoff valve (AHP-V301).

WARNING

serious injury or death from flying d


NOTE

ABPA regul

ly open HPFA drain valve (AHP-V305) and ABPA drive air bleed valve (ALP-V

air circuit. Close valves (AHP-V305 and ALP-V204).

Before opening bleed valves, rsonnel stand clear to avoid


NOTE

bb. Depressurize system IAW one of the foll

(1) SCBA cylinder assembly charging configuration

(a) Connect Filtered Air Supply Hose Assembly (H 103) to each SCBA cylinder

assembly and open Filtered Air Supply Hose Assembly (H-103) hose isolation valves

(b) Bleed system using Filtered Air Supply Hose Assembly (H-103) hose isolation

valves (AHP-V101/AHP-V102) bleed handle(s).

ensure all pe



ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet

pressure gauge (AHP-G204) should read zero.

owing:

(AHP-V101/AHP-V102) shutoff knob(s).

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bleed handle(s).

e Assembly (H-103) from SCBA cylinder

assembly.

(a) Bleed system using Filtered Air Supply Hose Assembly (H-103) hose isolation

valves (AHP-V101/AHP-V

s

ob(s) and bleed handle(s).

cc. valve (AHP-V206) and drive air control valve (ALP-V203) fully

clockwise.

dd. Back off ABPA drive air regulator (AH spring tension is released. The BACS is nowin STANDBY condition.

2.3.3 Disasse

(c) Close Filtered Air Supply Hose Assembly (H-103) hose isolation valves

(AHP-V101/AHP-V102) shutoff knob(s) and

(d) Disconnect Filtered Air Supply Hos

(2) Quick-charge configuration

102) bleed handle(s).

(b) Close Filtered Air Supply Hose Assembly (H-103) hose isolation valve

(AHP-V101/AHP-V102) shutoff kn

(c) Remove quick-charge wand from Filtered Air Supply Hose Assembly (H-103).

Rotate ABPA filtered air inlet

P-V201) until

mbly. The Disassembly Checklist (Table A-3) should be completed when the ferformed.

nnect drive air hose assembly (H-101) and filtered air hose assembly (H-10

ollowing

procedures are p

a. Disco 2) from HPFA and

b.

c. FA and ABPA drive air and filtered air connection points.

ABPA. Cap hose assemblies.

Disconnect Filtered Air Supply Hose Assembly (H-103) from ABPA. Cap hose assembly.

Cap all HP

d. Perform scheduled maintenance, as required.

e. Stow hose assemblies and ABPA IAW ship procedures.

2.3.4 Emergency Operation. Emergency operation procedures shall be followBACS not operate in a normal manner. An Emergency Operation Checklist (Table

ed immediately should the

A-4) should be completed.

a. Immediately close ship HP air system valve.

b. Refer to Chapter 5, Troubleshooting,for fault isolation procedures.

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.1 I

CHAPTER 3FUNCTIONAL DESCRIPTION

3 NTRODUCTION.

This chapter defines the functions of the major equipment groups for the Self-Contained Breathing Apparatus

Breathing Air Charging System (SCBA BACS). A description of how the equipment operates is also

Figure 3-1. SCBA BACS Functional Schematic and Flow Diagram.

FILTERIN-LINE

FILTER

IN-LINE

H-103

H-101

HP AIR GAUGE

included. Figure 3-1 provides a functional schematic and flow diagram of the system.

MANIFOLD

PUMPBOOSTER

SWITCHPILOTFILTER

DRIVE AIR

H-102

SYSTEM VALVE

HP AIR

AIR BOOSTER PUMP ASSEMBLY

HIGH PRESSURE FILTER ASSEMBLY

P

AHP-V301

AHP-G301

INDICATOR

AHP-V302

DESICCANTFILTER

AHP-V303

AHP-V305

AHP-V304

SHIP'S AIR IN

HOPCALITE/DESICCANT/

CHARCOAL FILTER

AHP-G201 ALP-G202ALP-V204

REG

AHP-V201 ALP-V203

AHP-V205

ALP-V202

AHP-V206

AHP-G204

TANK

SURGE

AHP-G203

P

EXTERNAL PILOT AIR INLET

AHP-V207

DRIVE AIR INLET

DRIVEAIR INLET

FILTERAIR INLET

CHARGEQUICK

WAND

FILTERAIR SUPPLY

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.2 DESCRIPTIO3 N.

The BACS is used by shipboard damage control and firefighting personnel as a means to charge SCBAs to aressure of 4,500 ps t

(CGA) G-7.1). The BACS can be used for charging SCBA cylinder assemblies or for quick-charging SCBA.

The BACS is comprised of three subassemblies: the Air Booster Pump Assembly (ABPA), the High Pressure

m the shiphigh-pressure air system. The ship high-pressure air system is hard-piped into the bulkhead-mounted HPFA,

assemblies. The filtered mblies via a Filtered Air Supply

Hose Assembly (H-102). The unfiltered high-pressure air from the HPFA is used to operate the booster pump.

3.2.1 ABPA

p i wi h breathing quality air (Grade D as defined by the Compressed Gas Association

Filter Assembly (HPFA), and connecting hose assemblies. The BACS receives high-pressure air fro

where it is divided into filtered and unfiltered air and then routed to the ABPA via two high-pressure hose

air is used to charge SCBA or SCBA cylinder asse

. The ABP ular frame. Theframe supports a control panel and is shielded by protective front and back covers. The ABPA receives both

e

ABPA via a quick disconnect (QD), passes by a gauge, and flows through a shutoff valve, where airflow into

4,500 psig (1) to the sensing port of a pilot switch (AHP-V205),

SCBA cyl essure relief valve is attached to the surge tank and is used to prevent

red

d passes through a filter into a cross before taking three paths: (1) to the pilot

circuit; an hat controls booster pump speed. Figure 3-2 illustrates and lists

ompo

A is a two-man portable system housed within an aluminum tub

high-pressure filtered air and high-pressure drive (unfiltered) air from the HPFA. The filtered air enters th

the booster pump is controlled. The air enters the booster pump, where the air pressure is increased to

. The high-pressure air then takes three paths:

which controls the flow of drive air to the booster pump; (2) to a surge tank, which serves to absorb high-pressure fluctuations during operation; and (3) through an in-line filter, past a high pressure gauge, and into the

inder assembly. A high-pr

over-pressurization of the filtered air circuit. The drive air enters the ABPA via a QD, passes a high-pressure

gauge, and flows through a regulator, where pressure is reduced to 125 5 psig. The reduced air is monito

by a low-pressure gauge answitch (AHP-V205), which automatically stops the flow of drive air to the booster pump when the filtered air

pressure reaches 4,500 psig; (2) to a relief valve (AHP-V304) that prevents over-pressurization of the drive air

d (3) past a flow control valve t

c nents of the ABPA

3.2.1.1 Drive Air Inlet Pressure Gauge (AHP-G201). The drive air Inlet P0 to 5,000 psig pressure gauge that displays regulator inlet pressure from the HPFA.

ressure Indicator is a

3.2.1.2 Drive Air Regulator (AHP-V201). The drive air regulator reduces the ship high-pressure airstemsy to 125 5 psig.

3.2.1.3 Regulated Ai r Pressure Gauge (ALP-G202). The Regulated Air Pressure Indicator is a 0 to200 psig pressure gauge that displays the reduced air pressure reading after the drive air pressure is regulated.

3.2.1.4 Drive Air Filter . The drive air filter removesan automatic drain valve (AHP-V305).

moisture and debris from drive air. This filter also has

3.2.1.5 Drive Air Relief Valve (ALP-V202). The drive air relief valve is located between the drive airgulator (AHP-V201) and booster pump and actuates if drive air exceeds 150 psig.

2.1.6 Drive Air B leed Valve (ALP-V204)

re

3. . The drive air bleed valve is used to release remaining driveair to the atmosphere after charging is complete.

3.2.1.7 Drive Air Contro l Valve (ALP-V203). The Drive Air Control Valve is a needle valve thatcontrols the flow of drive air to the booster pump. The more the drive air valve is opened, the faster the

booster pump will operate.

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Number Nomenclature Number Nomenclature

1 Filtered Air Outlet Pressure Gauge 9 Booster Pump

2 Drive Air Relief Valve 10 Drive Air Regulator

3 In-Line Filter 11 Drive Air Filter

4 Filtered Air Inlet Pressure Gauge 12 Drive Air Control Valve

5 Drive Air Bleed Valve 13 Surge Tank

6 Filtered Air Inlet Valve 14 Filtered Air Relief valve

7 Regulated Air Pressure Gauge 15 Pilot Switch

8 Drive Air Inlet Pressure Gauge

Figure 3-2. Air Booster Pump Assembly (ABPA).

3.2.1.8 Filtered Air Inlet Pressure Gauge (AHP-G204). The Filtered Air Inlet Pressure Gauge is a0 to 5,000 psig pressure gauge that indicates the filtered air pressure from the HPFA.

3.2.1.9 Filtered Air Inlet Valve (AHP-V206). The Filtered Air Inlet Valve is a needle valve that is usedto control filtered air flow through the booster pump to the SCBA cylinder assemblies.

3.2.1.10 Booster Pump. The booster pump, powered by low pressure drive air, is used to compress airfiltered by the HPFA to 4,500 psig.

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3.2.1.11 Surge Tank. The surge tank provides a volume to absorb high pressure fluctuations.

3.2.1.12 Filtered Air Relief Valve (AHP-V207). The Filtered Air Relief Valve is a relief valve that islocated on the surge tank, and actuates if air pressure exceeds 5,300 psig.

3.2.1.13 Pilot Switch (AHP-V205). The pilot switch senses when the booster pump discharge pressure

reaches 4,500 psig and shuts off the drive air supply.

3.2.1.14 In-Line Filter. The in-line filter removes particulates from booster pump discharge prior toentering the quick-charge wands.

3.2.1.15 Filtered Air Outlet Pressure Gauge (AHP-G203). The Filtered Air Outlet Pressure Gauge isa 0 to 6,000 psig pressure gauge that indicates charging air pressure.

3.2.2 HPFA. The HPFA is bulkhead-mounted and hard-piped into the ship high-pressure service line via abulkhead union in the top back center of the HPFA. Air flows through the bulkhead fitting to a tee that directs

the air to either (1) the drive air quick disconnect nipple and in-line filter ready for discharge to the ABP

(2) to the HPFA filters. Air directed to the HPFA filters first passes through a coalescor filter, through a check

valve, and then to the two cartridge holders. The first cartridge holder houses a desiccant cartridge for

moisture removal. The second cartridge holder houses a cartridge that contains a desiccant for moisture

removal, as well as a catalyst for conversion of carbon monoxide (CO) to carbon dioxide (CO

A or

al

ts

2), and charco

for odor removal. From the cartridge holders, the air enters the manifold, which directs the air to an H2O/COindicator housing and a pressure gauge. The air then passes through a micronic filter to a shutoff valve and a

quick disconnect socket, and is ready for discharge to the ABPA. Figure 3-3 illustrates and lists componen

of the HPFA.

3.2.2.1 Coalescor Filter. The coalescor filter removes moisture from air supplied by the shiphigh-pressure air system.

3.2.2.2 Relief Valve (AHP-V304). The relief valve actuates if pressure in the filter assembly exceed3,300 psig.

s

3.2.2.3 Check Valve (AHP-V303). The check valve ensures a one-way flow of air from the shiphigh-pressure air system to the cartridge holders.

3.2.2.4 Cartridge Holders. The two cartridge holders are identical, but hold different filter cartridges.The first, located on the right side of the assembly (labeled TOWER 1) holds a desiccant cartridge for moisture

removal; the second, located on the left side of the assembly (labeled TOWER 2) holds a composite filter

3.2.2.5 Manifold

element containing a desiccant, a catalyst for conversion of CO to CO2, and charcoal for odor removal.

. The manifold houses the H2O/CO indicator, HPFA gauge (AHP-G301), in-line filter,

3.2.2.6 H

shutoff valve (AHP-V301), and bleed valve (AHP-V302).

2O/CO Indicator. The H2O/ CO indicator is located downstream of the cartridge holders and

3.2.2.7 HPFA Indicator (AHP-G301)

indicates the presence of water and carbon monoxide in breathing air.

. The HPFA Indicator is a 0 to 5,000 psig pressure indicator thatdisplays filtered air pressure in the HPFA.

3.2.2.8 In-Line Filters. The first in-line filter removes particulates from the drive air before it is dischargedto the ABPA and the second removes any remaining particulates from the filtered air.

2.2.9 Shutoff Valve (AHP-V301)3. . The shutoff valve controls filtered air flow to the ABPA.

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umb um tureN er Nomenclature N ber Nomencla

1 7Relief Valve Drain Valve

2 8HPFA Indicator Coalescor Filter

3 9 alveDrain Check V

4 10 Cartridge HolderBleed Valve

5 Shutoff Valve 11 Manifold

6 H2O/CO Indicator 12 In-Line Filter

Figure 3-3. High Pressure Filter Assembly (HPFA).

3.2.2.10 Bleed Valve (AHP-V302). The bleed valve is used to release air from the filter assembly prior tochanging filter cartridges.

3.2.2.11 Drain Valve (AHP-V305). The drain valve is used to periodically remove oil and moisture that

blies

has fallen to the bottom of the coalescor filter housing.

3.2.3 Connecting Hose Assem .

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3.2.3.1 Drive Air Hose Assembly. The Drive Air Hose Assembly (H-101) connects the HPFA drive airoutlet QD to the ABPA drive air inlet QD.

3.2.3.2 Filtered Air Hose Assembly. The Filtered Air Hose Assembly (H-102) connects the HPFAfiltered air outlet QD to the ABPA filtered air inlet QD.

3.2.3.3 Filtered Air Supply Hose Assembly. The Filtered Air Supply Hose Assembly (H-103) connectsto the ABPA using a CGA 347 nipple with hand-tight nut. The Filtered Air Supply Hose Assembly (H-103)

SCBA cylinder and/or quick charge.

consists of two branches, each containing a combination bleed and shutoff valve. This design allows two

possible charging configurations

3.2.3.4 Quick-Charge Wand. The Quick-Charge Wand is purchased from the SCBA manufacturer andallows a quick-charge operation when connected to the Filtered Air Supply Hose Assembly (H-103).

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CHAPTER 4SCHEDULED MAINTENANCE

WARNING

Omission or negligent performance of prescribed maintenance

procedures for this equipment could result in equipment failure and

serious injury or death to personnel.

4.1 INTRODUCTION.

Proper scheduling and performance of preventive maintenance actions reduces equipment failures and ensures

efficient performance of the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA

BACS), hereinafter referred to as BACS. This chapter outlines safety requirements, defines the maintenance

concept, references the BACS Planned Maintenance System (PMS), discusses reporting requirements, andprovides general maintenance instructions relating to both scheduled and unscheduled (corrective)

maintenance actions.

4.2 SCOPE.

The preventive maintenance requirements for the BACS are addressed in this chapter to assist supervisors and

maintenance personnel in planning, scheduling, and documenting maintenance actions. The information in thischapter supplements the BACS PMS (paragraph 4.5) and is presented in the following sequence:

Safety Requirements

Maintenance Concept

Planned Maintenance System

United States Navy (USN) Maintenance and Material Management (3-M) System Coverage and

Problem Reporting

General Maintenance

4.3 SAFETY EQU

Instructions

R IREMENTS.

Maintenance personnel shall read and thoroughly understan e sa contained in this manual

and the approp te M quirement Card (MRC) contained in the SC MS before

performing an ain CS. Forces afloat should al th Office of the Chief of

val Operations Instructi Navy Occupation (NAVOSH)ogram Manual for Force OPNAVINST 5100.23,

vy Occupational Safety and Health (NAVOSH) Program Manual.

d th fety precautions

BA BACS Pria aintenance Re

y m tenance on the BA

on (OPNAVINST) 5100.19,

so comply wi

al Safety and HealthNaPr s Afloat, Vol I/II/III. Shore activities should comply with

Na

4.4 MAINTENANCE CONCEPT.

The BACS maintenance concept is based on the Navy PMS, which classifies maintenance into two categories

scheduled and unscheduled.

:

4.4.1 Scheduled Maintenance. Scheduled maintenance primarily ireliable system operation and includes actions such as in

nvolves actions required to ensure

spection, cleaning, lubrication, leak testing, and

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es located in Chapter 2 of this manual.

operational testing. Scheduled maintenance requirements are provided in the BACS PMS (paragraph 4.5) and

are also integrated in the operating procedur

4.4.2 Unscheduled Maintenance. Unscheduled (corrective) maintenance includes actions required tlocate equipment faults and to correct failures or perform

o

ance degradations. Unscheduled maintenance actions

that include troubleshooting and parts replacements are performed by maintenance technicians who are

adequately trained in the appropriate service requirements. Unscheduled maintenance is covered in Chapter 5,Troubleshooting, and in Chapter 6, Corrective Maintenance.

4.5 PLANNED MAINTENANCE SYSTEM.

Table 4-1 lists the nine MRCs that govern the SCBA BACS PMS. The MRCs are indexed and referenced on

Maintenance Index Page (MIP) 5519/018, SCBA BACS. MIP 5519/018 provides a summary of the

maintenance actions found on the MRCs, along with periodicity codes, personnel requirements, man-hours,d any related maintenance.

Table 4-1. SCBA BACS Planned Maintenance System.

Periodicity MRC Description

an

Q-1 Analyze Charging System Air Quality

Q-2 Test Operate Air Booster Pump Assembly (ABPA)

S-1 Replace High-Pressure Filter Assembly (HPFA) Tower Cartridges and HPFA H2O/CO IndicatorElements

A-1 Replace Air Booster Pump Assembly (ABPA) Drive Air Filter and Seal

A-2 Replace High-Pressure Filter Assembly (HPFA) Coalescor Element

A-3 Inspect Teflon, Thermoplastic, and Metal Hoses, End Fittings, and Supports

18M-1 Remove ABPA Pressure Gauge(s), deliver to IMA for calibration, install calibrated ABPA PressureGauge(s), and Test for Leaks

36M-1 Test Set Pressure of Drive Air Relief Valve (ALP-V202); Remove and Deliver Valve(s) to IMA forTesting

R-1 Inspect SCBA BACS

4.6 UNITED STATES NAVY MAINTENANCE AND MATERIAL MANAGEMENT SYSTEMCOVERAGE AND PROBLEM REPORTING.

The provisions of the OPNAVINST 4790.4 series, Ships Maintenance and Material Management (3-M)

Manual, apply to the SCBA BACS. Accordingly, any problems or need for corrective maintenance arising

from performance of the maintenance actions contained in the SCBA BACS MRCs should be properly

reported using Office of the Chief of Naval Operations (OPNAV) Form 4790/2K to ensure timely and accurate

Maintenance Data System (MDS) documentation of SCBA BACS performance in the Fleet. In addition to

Fleet requirements, MDS input from Fleet units is used by the In-Service Engineering Agent (ISEA) to

identify and correct problems within the system itself or the related documentation and provisioning, including

Coordinated Shipboard Allowance List support. The ISEA may be contacted at Commanding Officer, Naval

Surface Warfare Center Panama City, Attn: Code E53, 110 Vernon Avenue, Panama City, FL 32407.

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4.7 GENERAL MAINTENANCE INSTRUCTIONS.

WARNING

If in doubt about the serviceabilit

immediately. Use only approved maintenance parts. Component failure

he HPFA, ensure high pressure air

source is turned off and all pressure has been bled from the system.

exposure to escaping high pressure gas may result in serious

injury or death to personnel.

OT LOOSEN OR TIGHTEN FITTINGS WHILE SYSTEM ISUNDER PRESSURE. Failure to comply could result in damage to

nd serious injury or death to personnel.

y of a part, repair or replace it

during operations may result in serious injury or death to personnel.

Before performing maintenance on t

Accidental

Do not use trisodium phosphate (TSP) for cleaning HPFA or ABPA

aluminum components. Use may result in equipment failure and serious

injury or death to personnel.

DO N

equipment a

4.7.1 Equipment Disassembly and Parts Replacement. Disassemble equipment only as necessaryfor each scheduled maintenance procedure. Ensure proper tag-out procedures are performed prior to

conducting maintenance. Use only approved BACS replacement components. Ensure all replacement

components have been cleaned IAW MIL-STD-1622, Cleaning of Shipboard Compressed Air Systems.

4.7.1.1 Bagging Components. To maintain cleanliness of system, replace all dust caps and bag allexp d orming maintenance.

WARNING

ose components while perf

Cleanliness is imperative in handling and maintaining the SCBA BACS.

st be kept free of oil, grease, rust, or other

within an assembly could result in

d serious injury or death to personnel.

All tools and parts mu

contamination. Foreign substances

equipment failure an

WARNING

Do not use TSP for cleaning HPFA or ABPA aluminum components. Usemay result in equipment failure and serious injury or death to personnel.

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4.7.2 General Cleaning Procedure. Clean is defined as free of all loose scale, rust, grit, filings, dirt, oil,grease, and other foreign substances when viewed by the unaided eye. It is vitally important to keep the work

area and parts clean during maintenance of breathing air systems and equipment. To avoid introducing

esh

4.7.3 Leak Detection

contaminants or foreign particles into joints or connections that need to be opened for maintenance, clean the

affected parts with a soft bristle brush and cleaning solution prepared by mixing 1 teaspoon of MIL-D-16791,

Type 1 non-ionic detergent (NID) to 1 gallon of warm, fresh water. Rinse the cleaned parts with clean, fr

water and wipe dry with a clean cloth or air dry.

. The use of MIL-L-25567D, Type I leak-detection compound is preferred for leakhat were broken for maintenance. The NID solution

mentioned in paragraph 4.7.2 may also be used for leak testing if necessary.

testing all SCBA BACS air system connections t

4.7.4 Anti-seize Tape. The use of MIL-T-27730 anti-seize tape is required for all BACS pipe thretaping applications. Apply tape as follows:

ad

Thoroughly clean male and female threads assuring the removal of all previously applied anti-seize

tape. Do not allow f any taped fittings.

ale pipe thread beginning hird thread.

ing ca le the threads twice.

e anti-

4.7.5

tape particles to enter lines or valves during disassembly o

Wrap tape in spiral direction of m with second or t

Us re not to contaminate the tape, encirc

Us seize tape on pipe threads only.

Lubricants. Only MIL-S-8660 lubricant is authorized. Apply lubricants sparingly.

4.7.6 ingsO-R . inspected for damage andreplaced if necess

CAUTION

Exposed O-rings that are not required to be removed shall be

ary.

To avoid damage to O-ring groove, remove O-rings only using fingers or

the appropriate tool from an O-ring extractor kit.

4.7.6.1 O-Ring Removal. If an O-ring cannot be removed with fingers, use an O-ring installation andremoval tool. Scratching the O-ring groove may cause leakage or premature seal failure. Unless otherwise

directed, all removed O-rings shall be cut and discarded.

4.7.6.2 O-Ring Installation. Strict cleanliness and proper lubrication are essential during O-ringinstallation. Ensure new O-rings are of the proper size and material. To ensure correct installation, observe

the following:

Visually inspect new O-rings for deformities or compression set, hardening, or brittleness, nicks or

cuts, pits or blisters, or any other signs of damage. Cut and discard damaged O-rings and obtain new

O-rings for replacement.

Ensure parts are clean throughout the replacement procedure. Dirt, chips, or foreign particles in

O-ring grooves can cause leakage or damage to O-rings.

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Lubricate O-rings before assembly. Use only approved lubricants for O-rings. Apply lubricant

sparingly; excess lubricant can foul other

Do not needed for

proper i

Ensure ent of large O-rings

with rel

Do not ble, support,

cone, or

When re or exposed.

During installation of face seal O-rings,

When re ment.Rotating g of seals.

components.

overstretch O-rings during replacement. To avoid O-ring damage, stretch only as

nstallation.

O-rings are not twisted in groove as twisting occurs easily during replacem

atively small cross-sectional diameters.

force O-rings over corners, threads, splines, ports, or other sharp edges. Use thim

other device to prevent O-rings from contacting sharp edges of parts.

assembling SAE/MS straight-thread connections, ensure O-rings are not pinched

ensure O-rings are properly aligned.

assembling components, apply closing force to produce straight, longitudinal moveor twisting movements should be avoided to prevent bunching, cutting, or tearin

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CHAPTER 5

5.1 INTRODUCTION

TROUBLESHOOTING

.

This chapter contains the troubleshooti

source of equipment ction or performance degradation in the Self-Contained Breathing Apparatus

Bre i

5.2 GENE IONS

ng procedures and data necessary to assist personnel in locating the

malfun

ath ng Air Charging System (SCBA BACS).

RAL TROUBLESHOOTING INSTRUCT .

Trou le

This ma spections, or corrective

acti

notif t

Tab ctive actions for Air

Boo r

Referenapplicab

Table 5-1. ABPA Troubleshooting Guidelines.

Symptom Possible Cause(s) Fault Locating Procedure Corrective Action(s)

b shooting is based on locating potential faults in the equipment and taking timely corrective action.

nual cannot possibly list all malfunctions that may occur nor all causes, tests, in

ons that may apply. If a malfunction is not listed or is not remedied by the suggested corrective action(s),

y he supervisor.

les 5-1 and 5-2 list symptoms, possible causes, fault locating procedures, and corre

ste Pump Assembly (ABPA) and High-Pressure Filter Assembly (HPFA) malfunctions and failures.

ces to additional maintenance procedures located elsewhere in this manual are included wherele.

a. Ship high-pressure airsystem valve(s)

closed.

a. Ensure high-pressure airis available to HPFA and

ABPA.

a. If no pressure indicated, ensurecorrect execution of setup and

operating procedures in

paragraphs 2.3.1 and 2.3.2 have

been followed correctly.

1. Drive air inletpressure gauge

(AHP-G201)

not operational.

b. Drive air inletpressure gauge (AHP-

G201) failed.

b. Compare drive air inletpressure gauge (AHP-

G201) to high-pressure

air gauge on bulkhead.

b. Replace gauge IAW paragraph6.6.9.

a. Ship high-pressure airsystem valve(s)

closed.

a. Check drive air inletpressure gauge (AHP-

G201) reading.

a. If no pressure indicated, ensurecorrect execution of setup and

operating procedures in

paragraphs 2.3.1 and 2.3.2 have

been followed correctly.

b. Regulated air pressure

gauge (ALP-G202)failed.

b. Open drive air bleed

valve (ALP-V204).

b. If air escapes from (ALP-

V204), replace regulated airpressure gauge (ALP-G202)

IAW paragraph 6.6.9.

2. Regulated airpressure gauge

(ALP-G202)

not operational.

c. Drive air regulator

failed.

c. Determine if regulator

control knob rotates

freely.

c. If regulator control knob rotates

freely, adjust regulator control

knob IAW paragraph 6.6.2.d. If

regulator control knob does notrotate freely, replace drive air

regulator IAW paragraph 6.6.2.

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