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Summary of Contents for OCENCO M-20
- Page 1 Ocenco Incorporated M-20 Self Contained Self Rescuer Instruction Manual Manual No. N22069 Revision A, ECN 3071 Page 1 of 15...
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Page 2: Table Of Contents
3.1 How to Care for the M-20 3.2 How to Inspect the M-20 4. Donning Instructions 4.1 When to use the M-20 4.2 How to use the M-20 4.3 Transition from the M-20 to the EBA 6.5. Page 2 of 15... -
Page 3: Introduction
The M-20 was designed with two primary objectives, reliability and ease of use. The M-20 is the easiest of all self-rescuers to use. Six simple steps (see section 5.4) and these six steps should be practiced over and over by the trainees until it becomes second nature. -
Page 4: Description Of The
2.2.3 Duration The M-20 is approved jointly in the United States by the National Institute of Occupational Safety and Health (NIOSH) and the Mine Safety and Health Administration (MSHA) for a duration of 10 minutes. The duration of all self- rescuers can vary depending on the user’s oxygen consumption rate. -
Page 5: Components
2.3 Components The M-20 consists of four main assemblies: the cover, the base, the latch and the breathing Assembly. In the description of these assemblies the component names are in UPPERCASE letters. 2.3.1 COVER Assembly The COVER has an integral yellow TAB which, when lifted, releases any vacuum developed due to the change in atmospheric pressure from the surface to underground. - Page 6 M-20 Case 1. Cover 2. Overcase Cover 3. Latch Band 4. Base 5. Overcase Base 6. S-Hook 7. Tamper Ball 8. Lever Page 6 of 15...
- Page 7 8. Activation Cable: the stainless steel Activation Cable is attached to the oxygen Controller and permanently attached to the inside of the Base. Pulling the M-20 out of its Base releases the Activation Cable from the Oxygen Controller and starts the flow of oxygen into the Breathing Bag.
- Page 8 M-20 Breathing Assembly Noseclip (yellow) Mouthpiece (yellow) Neck Strap (yellow) Neck Strap O-ring Cylinder Oxygen Controller Gauge Activation Cable Scrubber 10. Breathing Bag 11. Relief Valve Information Label Page 8 of 15...
- Page 9 140 degrees F (60º C) Storage at temperatures above 140 degrees F (60º C) for short periods will not adversely affect the M-20. In an emergency, don the M-20 regardless of temperature. Scrubber life is limited to one escape event or one oxygen charge Mandatory factory service is required after 10 years if stored and 5 years if M-20 is carried.
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Page 10: Theory Of Operation
M-20 Theory of Operation Constant Flow of Oxygen Demand Flow of Oxygen Inhalation Exhalation Relief Valve Exhaust Page 10 of 15... -
Page 11: Care And Maintenance
Within the system of distributing the M-20’s to mining personnel there should be consideration for accountability of the condition of the self-rescuer when it is returned. Teaching trainees to care for the M-20 must be a combination of instruction and enforcement. -
Page 12: How To Inspect The
4.) Ensure that the M-20 EEBD has not exceeded the life date printed on the information label. Ensure belt worn period (5 consecutive years) has not expired. If the M-20 fails any of the above inspections, it should be removed from service and returned to Ocenco Incorporated facility. Page 12 of 15... -
Page 13: Donning Instructions
4. Donning Instructions: 4.1 When to use the M-20 The M-20 should be used immediately at the first indication of a fire or explosion even though no smoke is visible. Carbon monoxide is odorless and colorless, so you could breathe fatal amount of the gas before smoke is present. If you suspect an oxygen deficient atmosphere, put on the M-20 since it also gives you protection in an oxygen depleted atmosphere. -
Page 14: Transition From The M-20 To The Eba
Storing the Ocenco, Incorporated EBA 6.5 within reach of the M-20 allows an extension of escape time. Transition from the M-20 to EBA 6.5 should first be illustrated by use of the training video and then practiced, “hands on”, by the trainees. The training video shows the donning of the M-20 and then shows the following transition to the EBA 6.5:... - Page 15 Proper handling, maintenance, and other information as supplied in this manual are essential to the effective use of the EBA 6.5. The user should be familiar with Instructions for Use 1-12 before attempting to use the EBA 6.5. M-20 Approval Label Page 15 of 15...
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