Trane BAS-APG001-EN, Engineered Smoke Control System for Tracer Summit ast actuator fail checka

Figure 59 illustrates a basic actuator failure routine. Some changes are necessary when automatic self-testing is added to the program. The different ways of controlling an actuator have different means of resetting a failure. The failure reset is automatic if a failure is discovered during an automatic smoke alarm response or manual override from the smoke control panel. The failure indication is only maintained while there is a failure. On the other hand, the triggering of a system self-test, either scheduled or manual, will reset any failures discovered during a previous system self test. Figure 60 and Figure 61 on page 111 show the changes necessary to any dedicated system failure test routine. In either case, the connected BCU should be programmed to store the actuator failure in the alarm log.

Binary variable 21 goes true for a minimum of 10 seconds whenever a system self-test is triggered (see Figure 56 on page 106). This will reset any stored failures from a previous system self-test.

Figure 60. ast actuator fail checka 3-13-06