Weekly self-test of dedicated systems
Weekly self-test of dedicated systems
Dedicated
Dedicated smoke control system equipment must be programmed to automatically test itself on a weekly basis. The tests ensure that the system will operate if needed. Nondedicated smoke control system mechanical equipment is assumed to be tested by the working HVAC system.
Two approaches can be used to test the mechanical function of the system: either test each damper or fan as if it is being overridden from the smoke control panel, or test the reaction to each floor alarm. The first technique, which is the most comprehensive and requires the least programming, will be discussed. In either case, a failure must be annunciated at the smoke control panel both visually and audibly. It is acceptable to use the Trouble LED, the relevant failure LED, and the interior audio alert.
An AST can be triggered either from a BMTX BCU or manually at the smoke control panel. Figure 55 shows a program fragment that triggers the AST. The scheduled trigger uses a Tracer Summit controlled binary variable. To manually trigger the AST, the user disables the smoke control panel and silences the audio alarms for 15 to 20 seconds. The AST signal is then sent to the mechanical system control to start the
Figure 55. Triggering the automatic self-test (AST)
At the receiving end of the AST signal is the mechanical system which is under test. The automatic
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