OCENCO M-20.2 Instruction Manual

OCENCO M-20.2

Self-Contained Self-Rescuer

Emergency Escape Breathing Device

INSTRUCTION MANUAL

Manual No: NH22050

Revision F, ECN 2760

Page 1 of 16

WARNINGS AND CAUTIONS

WARNINGS

1) WEARERS MUST BE FULLY TRAINED IN THE USE AND CARE OF THE EQUIPMENT.

2) INDIVIDUAL WARNINGS MUST BE STRICTLY ADHERED TO WHICH, IF NOT, IT COULD RESULT
IN INJURY AND OR DEATH OF PERSONNEL.

3) THE M-20.2 EEBD MUST NOT BE USED FOR PURPOSES OTHER THAN THOSE OUTLINED IN
THIS MANUAL.

4) THE M-20.2 EEBD IS NOT TO BE USED UNDERWATER.

CAUTIONS

1) THE M-20.2 EEBD MUST BE REGULARLY INSPECTED TO ENSURE OPERATIONAL READINESS.

2) IF THE M-20.2 EEBD FAILS ANY OF THE INSPECTIONS, REMOVE THE UNIT FROM SERVICE
IMMEDIATELY.

3) REMOVE THE UNIT FROM SERVICE IF THE TAMPER BALL IS MISSING.

4) THE FLOW OF OXYGEN WILL BEGIN AUTOMATICALLY WHEN THE UNIT IS REMOVED FROM IT’S
BASE. YOU SHOULD NOT EXPECT TO HEAR THE FLOW OF OXYGEN OR SEE THE BREATHING
BAG INFLATE.

Page 3 of 16

SECTION 1

CLASSIFICATION OF THE M-20.2 EEBD

The Ocenco M-20.2 is a belt worn or stored, compressed-oxygen, Emergency Escape Breathing Device
(EEBD). The M-20.2 EEBD instantly provides breathable air, independent of the surrounding atmosphere,
to a person escaping from any area of toxic gas or oxygen deficiency.

The M-20.2 EEBD meets or exceeds the EEBD requirement for confined spaces onboard ships in the
United States Navy, the 10 minute self-contained closed circuit breathing apparatus requirement for
escape from confined space, and the EEBD requirement for use in maritime shipboard confined spaces as
required in the SOLAS Convention.

Page 4 of 16

SECTION 2

METHOD OF OPERATION

Oxygen automatically and continuously flows from the cylinder to the breathing bag when the unit is pulled
from the base.

During inhalation, and whenever the bag flattens, the oxygen regulator increases the oxygen flow into the
breathing bag.

During inhalation, oxygen passes from the breathing bag through the scrubber and into the mouthpiece.

During exhalation, carbon dioxide laden air is exhaled through the scrubber and then into the breathing
bag.

During inhalation and exhalation, carbon dioxide is absorbed by the lithium hydroxide scrubber.

Occasionally, during low work rates, the oxygen regulator supplies more oxygen than the user can
consume. When this occurs, the excess gas automatically vents through the relief valve.

The starting of the oxygen flow, the increased flow rate during high work rates, and the occasional venting
of gas through the relief valve, all occur automatically: the user needs only to breathe.

1. Constant Flow of Oxygen

2. Demand Flow of Oxygen

3. Inhalation

4. Exhalation

5. Relief Valve Exhaust

3

2

4

1

5

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