MSA PremAire Cadet Escape G1 Operating Manual page 16

DO NOT use the respirator if it exhibits leakage. Return the respirator to an MSA trained or certified
repair person to correct the condition. Misuse can result in serious injury or death.
WARNING
(7) Check for bypass operation. Grasp the red knob and turn it
counter-clockwise. Listen for airflow. Turn the knob clockwise to
close the bypass.
PremAire Cadet Escape G1
Operation
US
16