CREW CONTROLS AND INDICATORS - Continued
Ventilated Face Piece System (VFPS)
Control Box On/Off Switch
When ON, this switch activates air puri-
fier unit and supplies electrical power for
operation of M3 heaters.
This switch is a two-position toggle
swtich, covered by a red guard.
The switch lever is positioned up for ON
and down for OFF.
Control Box Power Indicator Lamp
This blue-green lamp lights when on/off
switch is positioned ON.
M3 Heater Control Knob
Warms breathable filter air received at each
ventilated face piece (VFP).
When NBC power control box on/off switch
is on, control knob at each heater can be
turned on and adjusted for desired heater.
Turning control knob clockwise increases
heat. Each heater IS individually controlled.