TM 3-4240-302-30&P-5
particulate and gas filters to the airflow
the outside must wait 5 minutes within the PE
valve.The filtered air passes through the airflow
before entering the shelter. Contamination is
valve and is carried by airduct hoses to the
purged by the flow of filtered air. The protective
protective entrance (PE) through the airflow
entrance control module (PECM) automatically
valve and silencer and to the shelter through the
adjusts the airflow valve and silencer assembly
air conditioner. Pressure sensing components
to maintain the proper air pressure inside the
in the compartment control module (CCM)
protective entrance.
automatically adjust the airflow valve to maintain
a positive pressure in the shelter.
d. CPE System Configurations.
Collective
protection equipment is configured to fit the needs of a
(2) The PE provides a pressurized transition area
specific application and may differ from the typical
between
the
shelter
and
the
outside
system discussed above.
contaminated zone. Personnel entering from
TYPICAL CPE CONFIGURATION
1-2