Premaire Cadet Operation; Air-Supply Hose And Pressure Gauge; Operating Principles; Interconnecting Air-Supply Hoses - MSA PremAire CADET Manuel D'instructions

PREMAIRE CADET OPERATION

The PremAire CADET Supplied-Air Respirator provides
respirable air to the user on demand - not constantly, as
in a constant-flow type device. As such, it is suitable for
use with a large, compressed air cylinder of breathable air
or a bank of cylinders set up in cascade fashion.
Alternatively, the PremAire CADET Respirator can be used
with a compressor system designed and configured to
supply respirable breathing air to the respirator, within the
NIOSH approved pressure range. The PremAire CADET
Respirator is designed to maintain a slight positive pres-
sure of air inside the facepiece, whether the wearer is
inhaling or exhaling, to prevent contaminants from enter-
ing the facepiece, should there be slight face-to-facepiece
seal leakage.
DO NOT use the PremAire CADET Respirator in an
IDLH atmosphere. Failure to follow these warnings
can result in serious personal injury or death.
IDLH means conditions that pose an immediate threat
to life or health or conditions that pose an immediate
threat of severe exposure to contaminants, such as
radioactive materials, which are likely to have adverse
cumulative or delayed effects on health [Title 42 CFR,
Part 84].
Non-IDLH means any hazardous atmosphere which
may produce physical discomfort immediately, chronic
poisoning after repeated exposure, or acute adverse
physiological symptoms after prolonged exposure.
[Title 42 CFR Part 84].
In normal use, the pressure-demand respirator is connect-
ed to an air supply of a type and duration selected by the
user and will provide respiratory protection as long as the
user remains connected to the air supply.
The heart of the PremAire CADET Respirator is a pres-
sure-demand regulator mounted at the facepiece. This
mask mounted regulator maintains a slight positive pres-
sure within the facepiece while regulating and reducing
the air supply to a breathable pressure. This is accom-
plished by using a diaphragm that senses the breathing
demands of the user in a controlled feedback state.

AIR-SUPPLY HOSE AND PRESSURE GAUGE

PremAire CADET Respirators can be used with a wide
range of MSA air-supply hose, which can be interconnect-
ed up to a maximum length of 300 feet. A maximum of 12
sections of air-supply hose may be used in making up the
maximum 300 feet working length of hose. Each section
of coiled hose is considered 50 feet in length (maximum 6
sections). MSA air-supply hoses have various temperature
limitations.

OPERATING PRINCIPLES

WARNING
DO NOT use the PremAire CADET Respirator
whenever ambient or inlet-air temperatures exceed
the limits specified below for each hose material.
Failure to follow this warning can result in serious per-
sonal injury or death.
HOSE
MATERIAL
Polyvinyl Chloride
Neoprene
Nylon

INTERCONNECTING AIR-SUPPLY HOSES

MSA air-supply hoses can be interconnected up to a
maximum length of 300 feet without voiding the NIOSH
approval. MSA offers both threaded and locking-type
quick disconnects.
This typical threaded connector method can be used to interconnect sec-
tions of approved air-supply hose to the PremAire System.
CEJN - Chrome
Quick Disconnect Socket with Check Valve 476956
Air Supply Hose
(3/4 - 16 UNF)
Socket and Plug Assembly 479009
SNAP-TITE — Aluminum
Socket and Plug Assembly 47901
Locking quick-disconnects easily connect by pushing the
plug and socket together. To separate, push the plug and
socket together, then pull the sleeve from the plug.
5
WARNING
RECOMMENDED
LIMITS
32˚F/120˚F
-25˚F/212˚F
-20˚F/180˚F
Quick Disconnect Plug 476955 (No Check Valve)
(3/4 - 16 UNF)
TAL 706 (L) Rev. 8 - 800810