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This chapter provides instructions for changing the batteries in an 3M Scott Air-Pak X3 Pro SCBA with a Personal
Alert Safety System (PASS) device, also known as a distress alarm.
Before You Begin
Because certain accessories and features require batteries for operation, always verify that this equipment and its
accessories have fresh batteries before use.
WARNING
Batteries are required for proper operation of this equipment. Failure to install batteries and to perform a
regular operational inspection may cause malfunction of the equipment, which could result in serious injury
or death.
Replacing Batteries in Respirators with PASS
3M Scott Air-Pak SCBAs equipped with a PASS device require 6 AA batteries for operation. The 6 batteries power
both the Heads-Up Display (HUD) and the PASS device; separate batteries in the gauge console are not required. Only
a trained operator should replace batteries in a clean, nonflammable area.
WARNING
Change batteries only in areas known to be non-flammable and non-explosive. Changing batteries in a
flammable or explosive atmosphere may cause an ignition, which could result in serious injury or death.
To replace the batteries
1
Close the respirator cylinder valve and open the regulator purge valve to let out all the trapped air.
CAUTION
Do not use tools to close the cylinder valve. Over-tightening the cylinder valve may cause damage that
could result in air leaking from the cylinder.
2 Close the regulator purge valve.
3 Press the manual reset (yellow) button on the remote pressure gauge console twice.
A 15-second beep sequence may occur as the residual air bleeds off. The unit will sound a 2-tone chirp as the elec-
tronics are deactivated, and the green light will go out.
P/N 595360-01
Rev G
Rev G
202004
P/N 595360-01
202004
REPLACING BATTERIES
CHAPTER 4
51
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