1.16 HYDRAULIC SYSTEM Continued.
Table 1-1. Hydraulic Components
This solenoid controls speed of vent (NBC) fan. In normal vent (NBC) mode, SV6 remains
unenergized or closed. SV6 becomes energized only during non-NBC mode.
Flow to heating circuit controlled by this solenoid. Under normal operation of system, this
solenoid is unenergized or open which allows fluid to return to reservoir and filter. When
heat is requested, SV7 is closed forcing fluid over heating relief valve, RD2.
The rib inflation fan is operated by this solenoid. It is normally closed and is energized or
opened only when rib fan is needed.
Under normal operational modes this solenoid remains energized or closed to allow normal
flow through the recirculation fan motor. During NBC operation using external power, this
solenoid is opened to isolate recirculation fan motor which reduces the total system load or