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Chapter 7 Programming
118 BAS-APG001-EN
Nondedicated smoke purge
(UL-864: 3.21.h)
The term nondedicated refers to a system that provides the building’s
HVAC functioning under normal conditions and a smoke control objective
during a fire alarm condition.
The main concern when designing a nondedicated system is for
programming to ensure that, once a smoke alarm or FSCP override
occurs, any component of the smoke control system is controlled solely by
automatic smoke control or manual override commands. For details
regarding priority, see
Table 28 on page 101.
Figure 70 shows an example of programming for a nondedicated system
to implement the priorities in Table 28. In this figure, the smoke control
dampers for Floor 1 are controlled. The actuator position, either Open or
Closed, will default to whatever the HVAC system commands. There are
two states that will turn control over to either automatic smoke control or
FSCP overrides:
• If the broadcast general smoke alarm is TRUE, or
• If the FSCP override switch is set to either Open or Closed.
Figure 70. Implementing priorities for a nondedicated system:
Controlling damper actuators