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Figure 1-29. Static Mode, External Power, Cool Mode, NBC Off
Figure 1-31. Static Mode, External Power, Cool Mode, Thermostat Open, NBC Off

TM-10-5410-228-24 Chemical Biologiocal Protective Shelter (CBPS) System NSN 5410-01-441-8054 (Green) (EIC:5ZT) NSN 5410-01-482-4633 (Tan) Manual
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TM 10-5410-228-24
1.16.22 Static Mode, External Power, Cool Mode, Rib Fan On, NBC Off.
When the hydraulic circuit is in the cool mode and air beam pressure is reduced to below 1.5 psi for any
reason, the rib fan motor, M4, is automatically turned on. This is accomplished by applying +24 Vdc to the
coils of solenoid valves SV2, SV5, SV6, SV7, SV8, and SV9. SV2, SV5, SV6, and SV8 are opened and SV7 and
SV9 are closed. This diverts the hydraulic fluid flow away from the condenser fan, M1C, the compressor
motor, M1A, and through the rib fan motor, M4. The speed of the rib fan is controlled by flow control FP5
which diverts hydraulic fluid flow around the rib fan motor to limit its speed and pressure for safety. When
air beam pressure is increased to 2.9 psi, the system is returned to the previous condition.
Valve
SV1
SV2
SV4
SV5
SV6
SV7
SV8
SV9
Energized State
OFF
ON
OFF
ON
ON
ON
ON
ON
Position
Closed
Open
Closed
Open
Open
Closed
Open
Closed
Figure 1-30. Static Mode, External Power, Cool Mode, Rib Fan On, NBC Off
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