System Design Parameters; Verifying System Integrity During Non-Emergency Conditions; Weekly Self-Test; Verifying System Integrity During Emergency Conditions - Simplex 4100U Application Manual

System Design Parameters

Verifying System
Integrity During
Non-Emergency
Conditions

Weekly Self-Test

Verifying System
Integrity During
Emergency
Conditions
Automatic
Activation
The means for verifying system integrity during a non-emergency condition varies depending on
whether the smoke control system is a "dedicated" or a "non-dedicated" system.
•
Dedicated Smoke Control Components: Solely used for smoke control functions and are
not operated in a non-emergency condition. Dedicated system equipment is therefore required
to incorporate an automatic weekly self-test of each smoke control function.
•
Non-dedicated Smoke Control Components: HVAC components within a building which
are operated regularly. The normal "comfort" level associated with the proper operation of the
equipment serves as the means of maintaining system integrity.
The weekly self-test consists of the smoke control system automatically commanding the
associated function to operate and expecting, within a specified time, that the associated proof
sensor will operate. A valid proof sensor operation does not have to be annunciated. However, the
lack of an expected proof sensor operation should produce an audible trouble signal and indicate
the specific device which did not operate.
Smoke control system equipment must verify that a fan or damper has achieved its required end
function during emergency conditions. This end-process verification consists of monitoring fans
by vane or pressure differential switches, and dampers by degree-of-opening switches. These
monitored switches are further connected back to an input monitoring circuit of the Smoke
Control System Equipment, programmed to expect a signal within a specified time after an
automatic or manual activation. Annunciation of the end-process verifies that the process operates
as intended; if the proof sensors fail to operate, an audible trouble signal is sounded.
Where equipment used for smoke control is also used for normal building operation, control of
this equipment must be preempted or overridden as required for smoke control. Automatic
activation of systems and equipment for zoned smoke control must have the highest priority over
all other sources of automatic control within the building. This equipment includes air
supply/return fans and dampers subject to automatic control according to building occupancy
schedules, energy management, or other purposes. The following controls should not be
automatically overridden:
•
Static pressure high limits.
•
Duct smoke detectors on supply air systems.
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