OCENCO EBA-75 Instruction Manual

INSTRUCTION MANUAL

FOR THE

EBA-75

CLOSED-CIRCUIT ESCAPE RESPIRATOR (CCER)

CAPACITY 3

Manual Number: NH24053

Revision: A, ECN 3590

December 14, 2015

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CONTENTS PAGE

INTRODUCTION………………………………………………………………………………... 3

GENERAL INFORMATION……………………………………………………………………. 3

WARNING………………………………………………………………………………………... 3

SYSTEM DESCRIPTION & OPERATION…………………………………………………… 3

OCENCO EBA-75 FUNCTIONAL DIAGRAM………………………………………………… 4

INSTRUCTIONS FOR USE…………………………………………………………………….. 5

INSTRUCTIONS FOR USE FOR USER AT REST…………………………………………... 5

INSPECTION & MAINTENANCE…………………………………………………………….. 6

INSPECTION CHECKLIST……………………………………………………………………. 7

OCENCO EBA-75 PARTS DIAGRAM………………………………………………………… 8

SPECIFICATIONS………………………………………………………………………………. 10

DISPOSAL………………………………………………………………………………………… 11

REGISTRATION…………………………………………………………………………………. 11

INSTRUCTION & APPROVAL LABEL……………………………………………………….. 12

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INTRODUCTION

This manual describes the specifications of the Ocenco EBA-75 and explains the proper use of the
unit. This manual also identifies key components and their functions. It demonstrates the proper
procedures for donning and using the Ocenco EBA-75 and the procedures to be followed in
performing daily and 90-day inspections.

GENERAL INFORMATION

The EBA-75 has been approved by MSHA/NIOSH under 42 CFR 84 as a Capacity 3, Closed-Circuit
Escape Respirator (CCER).

Similarly, the EBA-75 has the ability to provide a person with up to 6.5 hours of oxygen if he remains
at rest and follows the procedures necessary for maximum conservation of oxygen as explained in the
section titled Instructions for Use for User at Rest.

Because the EBA-75 is a life-saving escape device, each person using the unit should:

1) Be thoroughly familiar with and trained in the procedures for donning, wearing, and inspecting the
unit as explained in the Instructions for Use section on page 5 and the Inspection and
Maintenance section on page 6.

2) Avoid physical abuse to the unit.

3) Follow all NIOSH and MSHA recommendations regarding the use of self-contained self-rescuers.

WARNING

The EBA-75 was designed and approved solely as an exit or escape device. The unit is not intended
or approved as an entry and rescue breathing apparatus. Furthermore, the unit was not designed or
approved for fire fighting or underwater breathing.

SYSTEM DESCRIPTION & OPERATION

The EBA-75 is a closed circuit self-contained self-rescue device designed to be wearable with an
additional protected harness for shoulder support. The unit is housed in a rugged transparent
polycarbonate case to permit rapid, easy visual inspection of all components and to give each user
greater confidence and familiarity in using the system.

The EBA-75 system consists of two simple sub-systems:

1) The compressed oxygen supply circuit, and

2) The closed breathing circuit.

The following descriptions refer to the included EBA-75 functional diagram shown on the next page.

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1) Compressed Oxygen Supply Circuit

Medical grade oxygen is stored in a DOT approved refillable oxygen bottle that has been pressurized
to 2250 psi and holds 110 liters of oxygen. The oxygen flow is controlled through a series of valves
and is activated by turning the ON/OFF valve counterclockwise. The pressure gauge is visible at all
times. The oxygen moves through the ON/OFF valve into a pressure reducing regulator that reduces
the oxygen pressure to 100 psi. The oxygen then passes from the pressure-reducing regulator
through a hose and into the demand regulator. The demand regulator provides a constant flow of 1.6
liters per minute with a minimum of 40 liters per minute upon demand. The oxygen then moves
through an additional hose from the demand regulator to the breathing bag.

2) Closed Breathing Circuit

The breathing bag is the reservoir of breathable gas and is constructed of durable urethane coated
nylon. Oxygen is inhaled from the breathing bag through an inhalation tube and mouthpiece. The
expired breath moves through the mouthpiece and to the CO2 scrubber through an exhalation tube.
The CO2 scrubber is constructed of steel with a lithium hydroxide bed to remove CO2 from the
expired breath. The scrubbed breath then re-enters the breathing bag through a tube connected to
the bottom of the scrubber and is mixed with fresh oxygen. A relief valve is located in the center of
the breathing bag to vent any excess pressure and to maintain the exhalation pressure of the
breathing circuit within safe limits.

EBA-75 FUNCTIONAL DIAGRAM

ON-OFF VALVE
* ACTIVATES SYSTEM

* PERMITS OXYGEN
CONSERVATION

FRANGIBLE DISC
* SAFETY RELIEF
* BOTTLE PRESSURE
RELIEVES AT 4800
PSI

PRESSURE REGULATOR
* REDUCES PRESSURE
TO 100 PSI

OXYGEN BOTTLE
* ALUMINUM CYLINDER
* 110 LITERS
* MEDICAL GRADE OXYGEN
* D.O.T. APPROVED
* REFILLABLE BY OCENCO
* 5000 P.S.I. TEST

PRESSURE GAUGE
* READS 2000-2500 PSI WHEN CHARGED

* VISIBLE DURING USE

ON

BREATHING BAG
* VOLUME - 5 LITERS

RELIEF VALVE
* RELIEVES EXCESS

PRESSURE OF THE
BREATHING BAG

DEMAND REGULATOR
* PROVIDES CONSTANT

FLOW OF 1.6 LITERS
PER MINUTE
* PROVIDES MINIMUM
DEMAND FLOW OF

40 LITERS PER MINUTE

MOUTHPIECE & VALVE ASSEMBLY

* CONTROLS INHALATION
AND EXHALATION
* REDUCES DEAD SPACE

SCRUBBER
* REMOVES CO

2

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