OPERATE GPFU - Continued
9.
When heater is no longer needed, turn control knob (9) counterclockwise to OFF
position.
NOTE
Do Steps (1) through (5) only when Nuclear, Biological, or Chemical
(NBC) attack is over and/or when ordered to do so.
1.
When protective masks (1) are no longer needed, disconnect air duct hose breakaway
sockets (2) from canisters (3).