MSA G1 SCBA Operating Manual page 35

WARNING!
If the primary low-pressure warning device does not alarm, the power module does not make a sound,
or the buddy lights or HUD lights do not come on, remove the SCBA from service. Make sure an MSA
trained and certified repair technician corrects the unsatisfactory condition before returning the SCBA
to service.
Failure to obey this warning can result in serious personal injury or death.
(18) Make sure the pressure reading on the control module display does not decrease more than
100 psi in 10 seconds.
a) If the pressure reading does NOT decrease more than 100 psi, turn the handwheel counter-
clockwise to open the cylinder valve.
b) If the pressure reading decreases more than 100 psi, a significant leak is indicated. Remove
the SCBA from service.
WARNING!
– Do NOT use the SCBA if the pressure gauge on the cylinder valve assembly and the control
module readings are not within 5 percent of full cylinder pressure:
• 2216 psi systems = 110 psi
• 4500 psi systems = 225 psi
• 5500 psi systems = 275 psi
– Do NOT use the SCBA if any of the following conditions occur:
• Pressure decreases more than 100 psi in 10 seconds
• Pressure reducer warning signal does not activate or does not continuously activate down to
pressures of 200 psi
• Control module or HUD does not light correctly
– Return the SCBA to an MSA trained and certified repair technician for repair.
Failure to obey these warnings can result in serious personal injury or death.
(15) Make sure there is no airflow from the regulator. If there
is airflow, do Steps (11) through (14) again.
(16) Make sure the control module and the HUD pressure
indicators show a full cylinder.
(17) Turn the handwheel clockwise to close the cylinder
valve.
G1 SCBA 2018 Edition
Donning
US
35