Low Battery; Low Temperature Operation; Using The Ric/Uac In Low Temperatures - 3M SCOTT AIR-PAK X3 PRO Operating & Maintenance Instructions

OPERATING THE RESPIRATOR
•
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 respirator 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.

Low Battery

You should always test your batteries before using your respirator as described in
in Chapter 2.
As the batteries begin to approach the end of their useful life, the low battery condition will be indicated by the
following:
•
The low battery indicator at the far right of the HUD will light for twenty (20) seconds and then begin to flash ten
(10) times per second.
•
If the respirator is equipped with a PASS device (distress alarm), the green lights on the control module and
backframe will go out.
While in low-battery condition, the HUD and the PASS device will continue to operate for a period of time greater
than the longest duration cylinder available for the respirator. However, you must replace the batteries before you use
the respirator again. See

Low Temperature Operation

Store respirators intended for routine or emergency use in areas where the temperature is maintained above freezing
(32° F / 0° C).
If a respirator's storage location can reach temperatures below freezing, you must ensure that all components of the
respirator are thoroughly dried after cleaning 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 use, do not exhale into the facepiece until the facepiece is completely donned and the nose cup
is properly in place against the face. This will prevent fogging of the cold facepiece.
The respirator cylinder must be refilled with compressed air that meets the requirements for Grade D or higher
compressed air as specified in the Compressed Gas Association publication CGA G-7.1 and has a dew point of -65°
F (-54° C) or lower.
If, after using the respirator, you doff the facepiece in a safe breathing area at temperatures near or below freezing,
place the facepiece and connected regulator under your outerwear to keep it warm next to your body in case
respirator reuse is required. At a minimum, remove the regulator and keep it warm.
Whenever the respirator is in place but not in use (standby condition) in areas at or below freezing, protect the
facepiece and regulator from exposure to water.

Using the RIC/UAC in Low Temperatures

Use the protective cap to keep the high pressure air inlet of the RIC/UAC coupling covered and dry at all times. Water
on the inlet may freeze, preventing connection to the RIC/UAC charging hose assembly or preventing removal of the
RIC/UAC charging hose assembly once connected.
34
"Chapter 5: Replacing Batteries" on page 43.
"Testing the Batteries" on page 16
P/N 595373-01 Rev C 202004