(4) Phase 13: pressure pulse (first). Steam pressurizes the chamber
through 1SOL. 5SOL is energized (opened), permitting cooling water to condense
steam from the chamber and drain to waste. When the chamber pressure reaches (F),
psia, 1SOL and 5SOL are de-energized (closed) and Phase 12, negative pulse, begins.
(5) Phase 12: negative pulse (first). 2SOL and 6SOL are energized
(opened). Chamber steam is exhausted to the ejector, condensed, and drained. When
the chamber pressure is reduced to 9.7psia, 2SOL and 6SOL are de-energized
(closed).
(6) Phase 13: pressure pulse (second). Steam pressurizes the chamber
through 1SOL. 1SOL and 5SOL are energized (opened). When the chamber pressure
reaches (F) psia, 1SOL and 5SOL are de-energized (closed), and the second Phase 12,
negative pulse, begins.
(7) Phase 12: negative pulse (second). This phase is identical to first Phase
12, negative pulse, except the chamber pressure is reduced to 4.8psia before 2SOL
and 6SOL are de-energized (closed), and the third Phase 12, negative pulse, begins.
(8) Phase 13: pressure pulse (third). Steam pressurizes the chamber
through 1SOL. 1SOL and 5SOL are energized (opened). When the chamber pressure
reaches (F), psia, 1SOL and 5SOL are de-energized (closed), and the second Phase
12, negative pulse, begins.
(9) Phase 12: negative pulse (third). This phase is identical to second
Phase 12, negative pulse.
(10) Phase 17: heat/exposure. 1SOL and 5SOL are (opened). The steam
pressurizes the chamber. When the selected exposure temperature is reached (as
sensed by the temperature transducer in the chamber drain line), the exposure time
begins. 1SOL de-energizes (closes) and energizes (opens) as necessary to maintain
the selected exposure temperature. When the exposure time for a wrapped goods
cycle expires, 1SOL and 5SOL are de-energized (closed).
(11) Phase 24: vent/dry. 2SOL and 6SOL are energized (opened). The
chamber pressure is reduced to 4.8psia. 2SOL and 6SOL remain energized (opened)
for 20 seconds if no drying was selected. 2SOL and 6SOL are de-energized (closed).
(a) Vent will last until the dry timer displays time and begins to count
down. This phase is also known as exhaust.
(b)
At the end of the dry time, there is a 20 second delay before the
next phase.
MD0354
1-21