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Smoke detection and system activation
BAS-APG001-EN 13
Zoned smoke control detection and activation
Zoned smoke control activation occurs on a signal from either a sprinkler
water flow switch or a heat detector. For maximum benefit, the zoned
smoke control system should only respond to the first alarm. Two design
techniques that prevent detection of smoke in zones other than the first
zone reporting are:
• Not activating smoke control on smoke detector signals
• Activating smoke control on signals from two separate smoke
detectors located in the same zone
Stairwell smoke control detection and activation
Stairwell smoke control activation occurs on an alarm signal from any
device, including sprinkler water flow switches, heat detectors, smoke
detectors, and manual pull stations (pull boxes). Most stairwell smoke
control systems operate in the same manner regardless of the source of
the alarm signal.
Elevator smoke control detection and activation
Elevator smoke control activation occurs on an alarm signal from any
device, including sprinkler water flow switches, heat detectors, smoke
detectors, and manual pull stations (pull boxes). Most elevator smoke
control systems operate in the same manner regardless of the source of
the alarm signal.
Atrium smoke exhausting detection and activation
Atrium smoke exhausting activation occurs on a signal from a beam
smoke detector. A beam smoke detector consists of a light beam
transmitter and a light beam sensor. Typically, the transmitter and the
sensor are located apart from each other. However, when located together,
the transmitter sends its beam to the opposite side of the atrium. At the
opposite side, the beam reflects back to the sensor.
Note:
Zoned smoke control should not activate on a signal from a
manual pull station (pull box). If pull box activation does not
occur in the zone that contains the fire, activation incorrectly
identifies the smoke zone.
Note:
The description of elevator smoke control detection and
activation does not apply to pressurization systems for
elevators intended for occupant evacuation.
Note:
Atrium smoke control should not activate on a signal from a
manual pull station (pull box). Atrium smoke exhaust systems
have different operating modes depending on fire location.