The preliminary design of the Japanese Experiment Module (JEM) has started in January 1990. As a result of the JEM configuration review activity which was focused on the development cost and schedule prior to getting into the preliminary design, a part of the JEM Environmental Control and Life Support System (ECLSS) functions was changed.
This paper presents the JEM ECLS system baseline and the subsystem configuration at the start of the Phase C/D. Also the outline of the preliminary cabin air ventilation testing which started in March 1989 is described.
