attachment 2 section i ? technical specifications commuter coach ...

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ATTACHMENT 2
system air flow shall be separated from the engine compartment by fire resistant material. Piping
through the bulkhead shall be copper, steel, or brass, and shall be sealed with fire-resistant material at
the firewall. Wiring may pass through the bulkhead only if connectors or other means are provided to
prevent or retard fire propagation through the firewall. The conduit and bulkhead connectors shall be
sealed with fireproof material at the firewall. Engine access panels in the firewall shall be fabricated of
fireproof material and secured with fireproof fasteners. These panels, their fasteners, and the firewall
shall be constructed and reinforced to minimize warping of the panels during a fire that will
compromise the integrity of the firewall. The coach body shall be adequately sealed to prevent the
intrusion of smoke, fuel, and fumes into the coach interior.
2.7.10 FIRE SUPPRESSION SYSTEM
An Amerex V-25 or approved equal fire suppression system shall be provided. Each nozzle will
provide at least 240 cubic feet of flooding coverage with application coverage of at least 900 square
inches. Cast iron fittings may not be used. All hoses shall be secured to prevent rubbing/contact with
suspension/chassis components.
Actuation of the agent the cylinder valve used to distribute the extinguishing agent shall be
accomplished by a mechanical control header/lever. The lever shall lock in only the fully open or fully
closed position. Remote actuation shall be accomplished by a pneumatic control head releasing
nitrogen gas by striking a push button. The tanks shall have an operating pressure of 1800 psig and
shall be equipped with a pressure gage with a green area showing acceptable operating range.
The presence of fire shall be detected by devices approved by Factory Mutual Research Corporation as
heat actuated fire detectors. A circuit monitor shall provide electrical supervision of the power, heat
detection and system actuation. The enclosure shall be watertight. The control shall indicate Normal,
Fire and Fault conditions. A red LED shall clearly be labeled fire. The circuit monitor shall also be
equipped with an audible alarm that is activated in either the Fire or Fault situation. A method to
silence the alarm shall be provided.
A circuit supervision and control capability shall be provided for the fire suppression system shall be
visible to and accessible by a seated operator. The control shall supervise the automatic fire
suppression system electrical circuits, facilitate the connection for these various circuits and provide
auxiliary contacts that control external vehicle shutdown or safety devices in the event of activation of
the fire suppression system. This panel shall also control the nitrogen cylinder by showing pressure. A
battery backup shall be provided. An internal test circuit and internal diagnostic capability shall be
supplied.
A dry chemical fire suppression agent distribution system with two (2) nozzles shall be installed. The
entire system shall be approved by the Factory Mutual Research Corporation for mobile equipment
operating between -65 degrees F and +150 degrees F. Nozzles shall be brass and equipped with dust
caps that are displaced by the chemical flow and fall in an area so that they do not add fuel for a fire.
2.7.11 EXTERIOR AND APPLIED PANELS
2.7.11.1 STRENGTH AND INSTALLATION