American Audio VELOCITY - REV 4-05 Operations Instructions download pdf (Page 135)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-130 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

B. At aerial and underground stations, the fire alarm system will report to the

Emergency Management Panel (as well as to SCADA), where it will have a

remote annunciator and a graphical and tabular display which will guide first

responders to the location of the alarm.

C. There shall be two evacuation zones per station (at the underground and aerial

stations) – an all evacuation zone, and an ancillary area only zone. The fire

system will be programmed so that any one smoke or heat detector activation in

the ancillary area will evacuate only the ancillary area. Any smoke detector in

the public area will evacuate the entire station. Any two smoke or heat detectors

anywhere in the station will evacuate the entire station. Any water flow alarm

within the station will evacuate the entire station. Water flow or smoke detect

alarms outside of the station will not evacuate the station.

D. Underground stations shall have two deluge systems – one for each track.

Activation of the deluge system shall cause the power on the affected track to be

removed. This removal of power should occur in two ways – one through the

deluge button being pushed, and one through the flow switch that senses the

deluge water flow (through the fire panel).

E. Underground and aerial station’s TC&C rooms shall typically be protected by

pre-action systems, which will be activated by a cross zone of smoke detectors

and the activation of a low pressure switch.

F. Elevators shall be recalled through the fire panel by activation of an elevator

lobby smoke detector, or elevator equipment room detector. Alternate floor

recall will be required as needed.

G. Elevator equipment rooms shall be shunt-tripped through the fire panel by

activation of a heat detector in the elevator equipment room (present code

requires a heat detector within 18 inches of each sprinkler head). The AC power

used to shunt trip the elevator room must also be monitored. In addition, when

the room is shunt-tripped, the battery lowering device must be disabled (also

through a control or relay module from the fire panel).

H. Fans (except the Emergency fans) over 2000cfm shall shut down through the

fire panel, and fire smoke dampers shall close. In an underground station, a

shutdown scheme should be designed so that a fire detector or a water flow

switch in that area will shut down all fans and close all dampers in that area.

I. Fire system design shall minimize false alarms through the use of intelligent

detectors, alarm verification, detector placement, and type of detector.

Additionally, detectors in the public area and in cross passages should require

carbon monoxide, infrared, smoke, and heat detection (or similar technology) to

activate an alarm, in order to minimize the effects of false alarms on train

movement and station evacuation or it may be possible to use a fully combined

fire and gas alarm system, if such a system can be shown to meet Metro’s

needs, with the concurrence of Metro and the AHJ.

J. In stations where a gas detection system is located, the fire alarm system may

be used as the means of evacuating the station based on a high gas alarm (with

1 2 ... 130 131 132 133 134 135 136 137 138 139 140 ... 190 191

Comments to this Manuals

No comments

American Audio VELOCITY - REV 4-05 Operations Instructions Page 135

Comments to this Manuals