OPERATION UNDER EMERGENCY CONDITIONS.
a. NBC (nuclear, biological, chemical).
This unit has provisions
external NBC filtering source. The location of the NBC connection point is shown if Figure 2-
it be necessary
in conditions requiring use
of NBC filtration equipment,
see specific instructions for your shelter or facility installation. For additional general NBC
information, refer to MIL-HDBK-116, Environmental Control of Small Shelters. The following
are general suggestions for operation in NBC hazards and do not apply if they conflict with
instructions for you shelter or facility installation.
(1) The fresh air damper should be closed, the opening should be covered with duct tape
(2) The conditioned air inlet louvers should be adjusted (partially or completely) closed
in conjunction with the NBC filter intake volume. This will cause a more positive pressure on
inside of shelter or enclosure and keep air from being drawn.
b. Power conservation. During periods when full 208 volt, 3 phase power is in critically
short supply, the air conditioner should not be turned off completely, but should be operated in
VENTILATE mode only.
Figure 2-5. Nuclear, Biological,