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Dräger PSS BG 4 plus

Dräger PSS BG 4 plus
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WARNING
Strictly follow the Instructions for Use.
The user must fully understand and strictly observe the
instructions. Use the product only for the purposes specified
in the Intended use section of this document.
!
Dräger PSS BG 4 plus
i
Draeger BG4 Maintenance Manual
Draeger Training Department
Reference Only - Material subject to change without notice
Draeger Training 11/16 rev 1

Table of Contents

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Dräger PSS BG 4 plus Specifications

General IconGeneral
TypeClosed-circuit breathing apparatus
Air SupplyCompressed air
Oxygen Cylinder Capacity4 liters
Operating Pressure200 bar
Durationup to 4 hours
Breathing GasAir
Maximum Operating Depth40 meters
UsageFirefighting, rescue operations
WeightApprox. 15 kg (ready to use)

Summary

For your safety

General safety statements

Read and strictly follow all instructions for use and associated product instructions for safe operation.

Meaning of the alert icons

Defines DANGER, WARNING, CAUTION, and NOTICE icons used to highlight critical information for user awareness.

Description

Product overview

Provides a detailed overview and illustrations of the closed-circuit breathing apparatus and its Sentinel component.

Functional description

Explains how the closed-circuit breathing apparatus and its electronic monitoring system operate.

Intended use

Specifies that the apparatus supplies breathing air for approx. 4 hours for fire services and mining operations.

Limitations on use

Outlines general and specific cautions, limitations, and restrictions related to the usage period of the apparatus.

Approvals

Lists the approvals and standards the closed-circuit breathing apparatus and Sentinel meet, including DIN EN 145 and NIOSH.

Explanation of symbols and type-identifying marks

Explains symbols and type-identifying marks displayed on the Sentinel and the apparatus.

Use

Prerequisites

Lists necessary checks and conditions before using the apparatus, including protective gear and regulations.

Prior to first use

Details the steps for initial inspection and testing of the closed-circuit breathing apparatus before its first use.

Preparation for use

Guides users through the steps required to prepare the apparatus for use, including fitting components and initial tests.

Fitting the compressed oxygen cylinder

Provides instructions on how to correctly fit and secure the compressed oxygen cylinder into the apparatus.

Inserting an ice pack

Explains how to prepare and insert an ice pack into the breathing air cooler for temperature reduction.

Testing correct functioning of the closed-circuit breathing apparatus

Details the procedure for testing the correct functioning of the apparatus using the Sentinel display.

Donning the closed-circuit breathing apparatus

Provides step-by-step instructions on how to correctly put on and secure the closed-circuit breathing apparatus.

During use

Offers general instructions, emergency procedures, and alarm switching for during apparatus use.

After use

Outlines the steps for safely removing and preparing the apparatus for servicing after use.

Maintenance

Maintenance intervals

Specifies the recommended intervals and work to be done for the maintenance of various components.

Disassembly of the closed-circuit breathing apparatus

Details the systematic process for disassembling the apparatus, listing components to be removed.

Removing and testing the pressure relief valve

Explains how to remove and test the pressure relief valve, including checking O-rings and valve disks.

Removing the breathing air cooler

Guides the user through the process of removing the breathing air cooler and its associated parts.

Removing the lever

Describes the procedure for removing the lever, including lifting the safety knob.

Removing breathing bag, drain valve, minimum valve and where applicable the water absorber

Details the steps for removing the breathing bag, drain valve, minimum valve, and water absorber.

Removing the switch box

Explains how to remove the switch box from its holder using a slotted screwdriver.

Disassembling waist belt and shoulder straps

Provides instructions on how to disassemble the waist belt and shoulder straps for cleaning or replacement.

Unfastening the plug-in connectors on the medium-pressure hoses

Describes the method for unfastening plug-in connectors on medium-pressure hoses using a specific tool.

Cleaning and disinfecting

Outlines procedures for cleaning and disinfecting parts that contact exhaled air and other parts as needed.

Cleaning and disinfecting procedure for the USA only

Provides specific cleaning and disinfecting steps for users in the USA.

Cleaning and disinfecting procedure for other countries

Offers cleaning and disinfecting procedures tailored for users outside the USA.

Assembly of the closed-circuit breathing apparatus

Guides the user through the process of reassembling the apparatus after disassembly.

Fitting the minimum valve

Details how to fit the minimum valve, including checking for dryness and secure connection.

Fitting the breathing bag

Explains how to attach the pressure plate and slide the breathing bag into the apparatus.

Fitting the breathing air cooler

Describes how to position and fasten the breathing air cooler using the tensioning bar.

Connecting the hose of the constant metering valve

Guides the connection of the medium-pressure hose for the constant metering valve.

Assembling the connecting piece

Details the assembly of the connecting piece, including fitting valve disks and examining O-rings.

Fitting the breathing hoses

Provides instructions for fitting the breathing hoses, ensuring they are not twisted and secured with safety loops.

Testing of the closed-circuit breathing apparatus using the RZ7000

Describes how to perform leak-tightness and functional tests using the RZ7000 test unit.

Preparation of test

Outlines the initial steps for preparing the test unit and apparatus for testing.

Checking the response threshold of the low pressure warning

Details how to test the low-pressure warning activation point using the test unit.

Checking the inhalation valve

Explains the procedure to check the inhalation valve's function and pressure threshold.

Checking the exhalation valve

Describes how to test the exhalation valve's function and pressure threshold.

Checking the drain valve

Guides the user through testing the drain valve's opening pressure range.

Performing the leak test with positive pressure

Details the procedure for performing a leak test with positive pressure and checking pressure stability.

Checking the relief valve

Explains how to check the relief valve's opening pressure.

Performing the high pressure leak test (optional)

Outlines the optional procedure for performing a high-pressure leak test.

Checking constant metering valve and bypass valve

Describes how to test the constant metering valve and bypass valve for correct function.

Checking the minimum valve

Details the procedure for checking the minimum valve's opening pressure.

Checking the residual pressure warning

Explains how to check the residual pressure warning functionality and trigger points.

Inserting or replacing the Sentinel battery

Provides instructions for safely inserting or replacing the Sentinel battery.

Testing the functional capability of the Sentinel

Outlines how to test the Sentinel's functional capability without opening the cylinder valve.

Self-test sequence of the Sentinel

Explains the steps involved in the Sentinel's self-test sequence, including interface, battery, and leak tests.

Replacing the pressure reducer

Details the procedure for removing and installing the pressure reducer component.

Transport

Storage

Disposal

Technical data

Order list

Annex

Approval label

Shows the approval label detailing respirator configurations, limitations, and cautions.

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