Emergency Operation; Use Of Alternate Cylinders - Scott 2.2 Operating & Maintenance Instructions

EMERGENCy OPERATION

The respirator is automatic in function. It requires only the opening of the
cylinder valve and the proper donning of the facepiece to begin use, and
the closing of the cylinder valve to end use. If there is a malfunction or a
suspected malfunction, use one of the emergency procedures listed below:
1. If any end of service time indicator alarm actuates during use, (the
VIBRALERT or the HEADS-UP DISPLAY rapidly flashing red light),
even if the air supply has not been depleted to approximately 33%
of full rated capacity, LEAVE THE CONTAmINATED AREA AT ONCE.
IF THE VIBRALERT ACTUATES BEFORE THE AIR SUPPLY IS DE-
PLETED TO APPROXImATELY 33% OF FULL RATED CAPACITY, IT mAY
INDICATE A FAILURE OF THE PRImARY REDUCER PATH IN THE PRES-
SURE REDUCER, A mALFUNCTIONING REmOTE AIR SUPPLY GAUGE,
OR A FAILURE OF THE END OF SERVICE INDICATOR ALARm. LEAVE
THE AREA REQUIRING RESPIRATORY PROTECTION ImmEDIATELY
WHEN EITHER ALARm IS ACTUATED.
2. If the air supply is partially or completely cut off during use, fully open
the red purge valve on the regulator by turning it counterclockwise
(pointer on knob downward) and check to be sure the cylinder valve
is fully opened (turned fully counterclockwise). LEAVE THE CON-
TAmINATED AREA AT ONCE AFTER OPENING THE PURGE VALVE.
3. If the air supply begins to flow freely into the facepiece during use,
fully open the red purge valve knob on the regulator by turning it
counterclockwise (pointer on knob downward). Partially close the
cylinder valve by pushing in and rotating clockwise to regulate the
flow of air to satisfy the requirements of the user. Do not close the
cylinder valve completely. LEAVE THE CONTAmINATED AREA AT
ONCE AFTER PARTIALLY CLOSING CYLINDER VALVE.
4. If there is a blockage of air flow or sudden and complete loss of the
system air supply so that there is total loss of respiratory protection,
LEAVE THE CONTAmINATED AREA AT ONCE. USE ALL NECES-
SARY PRECAUTIONS AND FOLLOW EmERGENCY PROCEDURES
PRESCRIBED BY YOUR ESTABLISHED RESPIRATORY PROTEC-
TION PROGRAm.
If any of the above procedures are used, REmOVE THE RESPIRA-
TOR FROm SERVICE AND TAG FOR REPAIR BY AUTHORIZED
PERSONNEL.

USE OF ALTERNATE CYLINDERS

If SCOTT cylinder and valve assemblies of different pressures are used
in emergency situations, the following conditions will be observed:
• A fully charged 2216 psig rated cylinder or 3000 psig rated cylinder
installed on an AIR-PAK model 4.5 SCBA will cause the remote
pressure gauge to indicate less than "FULL" and the end of service
indicator alarms will activate well before approximately two thirds of
the air has been consumed.
• A fully charged 3000 psig rated cylinder installed in an AIR-PAK model
2.2 SCBA will cause the remote gauge to indicate more than "FULL"
and the end of service indicator alarms will not activate until mORE
than approximately two thirds of the air supply has been consumed.
• A 4500 or 5500 psig rated cylinder cannot be installed on an AIR-PAK
model 2.2 or 3.0 SCBA. The high pressure coupling between the res-
pirator and the cylinder will not seal when the coupling is threaded to
the cylinder and a large, high volume air leak will occur at the cylinder
connection when the cylinder is opened. This is intended to prevent
the lower pressure respirator components from being pressurized to
4500 or 5500 psig accidentally.
• A fully charged 5500 psig rated cylinder installed in an AIR-PAK model
4.5 SCBA will cause the RIC UAC Relief Valve to open and vent the
excess pressure. When the pressure in the cylinder has been reduced
to the operating pressure of the 4.5 SCBA, the valve will close. The
remote gauge and the end of service indicator alarms will operate
normally.
NOTE
Page 35 of 48
WARNING
T H E S E E M E R G E N C y
PROCEDURES ARE FOR EMERGENCy USE
ONly AND ARE MEANT TO SUPPlEMENT,
N O T R E P l A C E , T H E
P R O C E D U R E S P R E S C R I B E D B y y O U R
RESPIRATORy PROTECTION PROGRAM.
IF THEIR USE IS REQUIRED, lEAVE THE
HAZARDOUS AREA AT ONCE.
THESE EMERGENCy PROCEDURES WIll
INCREASE THE RATE OF CONSUMPTION
OF THE AIR SUPPly AND MAy CAUSE THE
END OF SERVICE INDICATOR AlARMS
TO D I M I N I S H I N I N T E N S I T y O R S TO P
COMPlETEly. FAIlURE TO lEAVE THE
H A Z A R D O U S A R E A I M M E D I AT E ly M Ay
RESUlT IN SERIOUS INJURy OR DEATH.
WARNING
THE AIRFlOW THROUGH THE RESPIRATOR
WHEN THE PURGE VAlVE IS IN USE CAN
EXCEED 200 lITERS PER MINUTE.
REDUCE AIR CONSUMPTION, THE AIRFlOW
MAy BE REDUCED By PARTIAlly ClOSING
THE PURGE VAlVE. FAIlURE TO lEAVE
THE HAZARDOUS AREA WHEN THE PURGE
VAlVE IS IN USE MAy RESUlT IN A SUDDEN
TERMINATION OF BREATHING AIR WHICH
COUlD CAUSE SERIOUS INJURy OR DEATH.
WARNING
EMERGENCy PROCEDURE #3 IS THE ONly
TIME THE RESPIRATOR MAy BE OPERATED
WITH THE CylINDER VAlVE lESS THAN
FUlly OPENED.
WARNING
THE USE OF ANy AIR CylINDER OTHER
THAN A CylINDER AND VAlVE ASSEMBly
APPROVED FOR USE WITH THE SPECIFIC
S C O T T A I R - PA K R E S P I R ATO R M O D E l
BEING SERVICED MAy RESUlT IN lOSS
OF AIR FROM THE CylINDER OR IMPROPER
OPERATION OF THE RESPIRATOR.
SEE THE NIOSH APPROVAl lABEl (SCOTT
DOCUMENT 595281-01) SUPPlIED WITH
THESE INSTRUCTIONS FOR CylINDER AND
VAlVE ASSEMBlIES APPROVED FOR USE
WITH SPECIFIC SCOTT AIR-PAK MODElS.
P/N 595279-01 Rev. B 5/14
O P E R A T I O N
E M E R G E N C y
USE OF
TO