Low Temperature Operation - Scott AIR-PAK 75i 2.2 Operating & Maintenance Instructions

LOW TEMPERATURE OPERATION

Respirators intended for routine use and respirators not routinely used but
kept for emergency use shall be located in areas where the temperature
is maintained above freezing (32° F / 0° C).
If a respirator may be unavoidably kept at a temperature below freezing
before the next use, special care MUST be exercised to be certain that
all components of the respirator are THOROUGHLY DRIED after clean-
ing and before storage.
If a respirator has been unavoidably kept at a temperature below freezing
and it is not possible to bring it to room temperature before it is to be
used, do not exhale into the facepiece until the facepiece is completely
donned and the nose cup is properly in place against the face.
If, after using the respirator, the facepiece is doffed in a safe breathing
area which is at temperatures near or below freezing, place the facepiece
with regulator connected under outerwear to keep it warm next to the
body in case respirator reuse is required.
Whenever the respirator is in place but not in use in areas at or below
freezing, the facepiece and regulator MUST be protected against expo-
sure to water.
USE OF THE RIC UAC IN LOW TEMPERATURE
Keep the high pressure air inlet of the RIC UAC coupling dry at all times.
Water on the inlet may freeze preventing connection to the RIC UAC
filling hose assembly or preventing removal of the RIC UAC filling hose
assembly once connected.
If the RIC UAC filling hose assembly is used to fill a respirator cylinder in
temperatures less than 32° F / 0° C and the full respirator is then moved
indoors to warmer temperatures, the pressure in the cylinder MUST BE
CHECKED FOR EXCESS PRESSURE within two hours after the respirator
is moved indoors. If the pressure gauge on the cylinder is reading above
"full", excess pressure must be removed from the cylinders by releasing
air from the respirator until the pointer of the gauge is reading "full".
Page 31 of 44
WARNING
USE OF THIS RESPIRATOR AT TEMPERA-
TURES AT OR BELOW FREEZING (32°F / 0°
C) WITHOUT FOLLOWING THE LOW TEM-
PERATURE OPERATION INSTRUCTIONS
MAY RESULT IN OBSCURED VISION AND/
OR PARTIAL OR COMPLETE BLOCKAGE
OF THE AIRFLOW WHICH COULD LEAD TO
SERIOUS INJURY OR DEATH.
WARNING
A PROPERLY INSTALLED NOSE CUP AS-
SEMBLY IS REQUIRED FOR USE OF THIS
RESPIRATOR IN TEMPERATURES AT OR
BELOW FREEZING (32° F / 0° C). FAIL-
URE TO USE THE NOSE CUP MAY CAUSE
OBSCURED VISION AND/OR PARTIAL OR
COMPLETE BLOCKAGE OF THE AIRFLOW
WHICH COULD RESULT IN SERIOUS INJURY
OR DEATH.
WARNING
RESPIRATORS MUST BE THOROUGHLY DRY
BEFORE AND DURING STORAGE. MOISTURE
ON A RESPIRATOR IN BELOW FREEZING
TEMPERATURES MAY CAUSE A MALFUNC-
TION OF THE RESPIRATOR WHICH COULD
RESULT IN SERIOUS INJURY OR DEATH.
WARNING
IF A RESPIRATOR CYLINDER IS FILLED
IN TEMPERATURES LESS THAN 32° F / 0°
C AND THE FULL RESPIRATOR IS THEN
MOVED INDOORS TO WARMER TEMPERA-
TURES, THE PRESSURE IN THE CYLINDER
MUST BE CHECKED FOR EXCESS PRES-
SURE WITHIN TWO HOURS AFTER THE RES-
PIRATOR IS MOVED INDOORS. FAILURE TO
VERIFY THAT CYLINDER PRESSURE DOES
NOT EXCEED THE RECOMMENDED MAXI-
MUM FOR THE CYLINDER MAY RESULT IN
A SUDDEN RELEASE OF HIGH PRESSURE
AIR WHICH COULD CAUSE SERIOUS INJURY
OR DEATH.
P/N 595236-01 Rev. B 10/11