Service Life; Intrinsic Safety - Scott 2.2 Operating & Maintenance Instructions

SERVICE lIFE

Each configuration of self-contained breathing apparatus (SCBA) certi-
fied by NIOSH is assigned a "service life" classification for a duration
time of each size of air supply cylinder (30 minute, 45 minute, etc.).
The service life duration time is determined by NIOSH using a breathing
machine designed to simulate an average adult user performing work at
a "moderate work rate."
Do not expect to obtain the NIOSH rated service life duration time from this
respirator on each use. The work being performed may be more or less
strenuous than that used in the NIOSH test. Where work is more strenuous,
the duration may be less than one half the NIOSH rated service life and the
time remaining after either end of service indicator alarm actuates may
be similarly reduced. The end of service indicator alarms actuate when
approximately 33% of full cylinder pressure remains in the cylinder and
valve assembly. Although all end of service indicator alarms are set to
actuate at the set point of approximately 33% of full rated service pres-
sure, they are completely independent of each other and therefore may
not actuate at precisely the same moment. The alarms will continue to
operate until the cylinder is nearly depleted.
The duration time of the respirator will depend on such factors as:
1. the degree of physical activity of the user;
2. the physical condition of the user;
3. the degree to which the user's breathing is affected by emotional
factors;
4. the degree of training or experience which the user has with this or
similar equipment;
5. whether or not the cylinder is fully charged at the start of the work
period;
6. the possible presence in the compressed air of carbon dioxide con-
centrations greater than .04% normally found in atmospheric air;
7. the atmospheric pressure; for example, if used in a pressurized tun-
nel or caisson at 2 atmospheres (15 psi gauge or approximately 30
psi absolute) the duration will be one-half as long as when used at
1 atmosphere; and at 3 atmospheres will be one-third as long;
8. loose or improperly fitting facepiece;
9. the condition of the respirator.

INTRINSIC SAFETy

The SCOTT AIR-PAK X3 SNAP-CHANGE SCBA respirator equipped
with a Heads-Up Display P/N 200280-SERIES and/or a PASS distress
alarm P/N 201160-SERIES is listed by SGS U.S. TESTING COmPANY
INC. as intrinsically safe per ANSI/UL Std. UL-913 for use in Class I,
II, Division 1, Groups C, D, E, F, and G Hazardous Locations.
To maintain the Intrinsic Safety Listing, the respirator must be inspected
regularly per the following Regular Operational Inspection procedures.
Do not tamper with or substitute components in any manner. Use only
batteries of the type indicated in the Battery Replacement instructions.
Open the battery compartments only in an area known to be free of
flammable or explosive hazards.
P/N 595279-01 Rev. B 5/14 Page 6 of 48
WARNING
S U B S T I T U T I O N O F C O M P O N E N T S M Ay
IMPAIR INTRINSIC SAFETy. TO REDUCE
THE RISK OF IGNITION OF A FlAMMABlE
ATMOSPHERE, BATTERIES MUST ONly
BE CHANGED IN AN AREA KNOWN TO
BE NONFlAMMABlE. TO REDUCE THE
RISK OF EXPlOSION, DO NOT MIX OlD
BATTERIES WITH UNUSED BATTERIES,
O R M I X B AT T E R I E S F R O M D I F F E R E N T
MANUFACTURERS.
WARNING
l O O S E O R W O R N E l E C T R I C A l
C O N D U C T O R S O R I N S TA l l AT I O N O F
INCORRECT BATTERIES MAy CAUSE A
HAZARDOUS SITUATION IN A FlAMMABlE
O R E X P l O S I V E A R E A . FA I l U R E T O
REGUlARly INSPECT THE RESPIRATOR,
INClUDING All ElECTRONIC COMPONENTS,
AS DESCRIBED IN THIS INSTRUCTION OR
FAIlURE TO CORRECT DAMAGE TO THE
ElECTRONIC COMPONENTS, MAy IMPAIR
THE INTRINSIC SAFETy OF THE UNIT. THE
INSTAllATION OF INCORRECT BATTERIES
O R S U B S T I T U T I O N O F A N y O T H E R
COMPONENTS MAy IMPAIR THE INTRINSIC
SAFETy OF THE UNIT. IF THE RESPIRATOR
IS USED IN AN EXPlOSIVE OR FlAMMABlE
ATMOSPHERE, IMPAIRING THE INTRINSIC
SAFETy OF THE UNIT MAy lEAD TO A FIRE
OR AN EXPlOSION WHICH COUlD RESUlT
IN SERIOUS INJURy OR DEATH.