North FRONTIER Series, Инструкция пользователя

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2.0 DESCRIPTION OF FRONTIER SCBA
The North FRONTIER is a self-contained, open-circuit, compressed-air breathing apparatus that is
approved by the National Institute of Occupational Safety and Health (NIOSH). (Figure 1)
Positive pressure is maintained within the facepiece during use, thus providing the highest degree of
respiratory protection in irrespirable atmospheres by preventing any inward leakage.
The FRONTIER consists of several major components described in the following paragraphs:
2.1 FACEPIECE OR HOOD
The North facepiece assembly has a four-point adjustable head harness. The facepiece standard
seal has a blended shape to ensure a proper fit. A standard inner-mask oral/nasal cup reduces
dead-air space and CO2 buildup. (Figure 2)
The North AirHood is also available for users that prefer to wear their own eyeglasses or may have
facial hair that may interfere with the sealing surface. The sealing surface of the hood is around the
neck, and there may not be any hair or jewelry interfering with the neck seal. The North AirHood is
NIOSH approved for entry into an IDLH atmosphere. The AirHood has a hard visor with a permanent
anti-fog coating that offers excellent vision, an inner oral/nasal cup to reduce CO2 build-up, and
adjustable side straps for a comfortable fit. The AirHood is available in two sizes to comfortably fit
any person. (Figure 2)
The AirHood facepiece is made of several components, each having different reactions to chemical
environments. It is vital to ensure that you have objective evidence that the hood will be able to
maintain its integrity against the expected chemical exposure during operations. This can be accom-
plished by tests you conduct or by contacting North for further information. Listed below are a few,
but not necessarily all chemicals that are known to work well with the AirHood's material:
Urethane (blue) Vinyl (clear)
Alcohols Weak acids
Fuels Strong alkali solution
Mineral oils Organic acids
Greases, oils
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Do not expose the respirator to excessive heat (above 140°F / 60°C), moisture, or contaminating
substances during storage. Excessive heat may distort the facepiece or hood, and their compo-
nents, resulting in the inability to achieve a proper fit. Moisture and contaminated air can dam-
age the demand and exhalation valves. Either of these conditions will expose you to the risk of
serious injury, illness or death.
NOTE
CAUTION
MANUAL BYPASS: The FRONTIER has a manually operated bypass which provides a continuous
flow of air to the facepiece or hood when required, independent of normal operation of the regula-
tor. The bypass is opened by turning the red knob on the Compact Demand Valve 90 degrees.