(12) Phase 31: air-IN. 3SOL is energized (opened). Filtered atmospheric air
enters the chamber and raises the chamber pressure to atmospheric reading. When
the chamber pressure reaches atmospheric reading, 3SOL is de-energized (closed).
(13) Phase 35: gasket retract (single door units). 10SOL is de-energized
(closed to steam/opened to ejector). 6SOL is energized (opened). Water to the ejector
creates a negative pressure in the gasket groove, retracting the door gasket within 30
seconds. Then the complete buzzer sounds and shuts off after the door is opened or
one minute has elapsed.
(14) Phase 35: gasket retract (double door units). The complete buzzer
sounds and shuts off after either the unseal door ("M" in figure 1-5) has been pressed or
one minute has elapsed. Pressing the desired unseal door de-energizes (closes to
steam/opens to the ejector) the gasket solenoid valves (10SOL and 11SOL). 6SOL is
energized (opened). Water to the ejector creates a negative pressure in the gasket
grooves, retracting the door gaskets within 30 seconds, and doors can be opened.
b. Unwrapped Instruments Cycle (16 x 16 only). Refer to figure 1-12.
Figure 1-12. Unwrapped instrument cycle (16 x 16 only).