December 2013
REQUEST FOR PROPOSALS FOR
PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES
RFP SRTA-2014-01
TECHNICAL SPECIFICATIONS
PAGE-22
13.2 Nozzles
a. Nozzles shall be brass, and be of the design approved by FMRC for use with the
vehicle suppression system specified herein. Nozzles shall be located to protect
specific hazards as identified by the system installer and the equipment owner.
All nozzles are to be fitted with dust caps that, upon system actuation, are
displaced to allow full chemical flow. The caps are to be constructed so that upon
displacement they do not drop into a fire hazard where they can contribute as
fuel to an in-progress fire.
b. Nozzles shall be of the type to provide both total flooding and local application
coverage. Nozzle coverage shall be modular to provide a minimum single nozzle
total flooding coverage of 244 cu. ft. or local application coverage of 900 sq. in.
Nozzles shall be combined with appropriate agent cylinders to yield 4, 6, or 8
nozzle combinations. A minimum of four (4) nozzles shall be provided in the
engine compartment.
13.3 Extinguishing Agent
The system shall use as its extinguishing agent ammonium phosphate base,
multipurpose class ABC dry chemical. This agent shall be approved for use with the
system specified herein by Factory Mutual Research Corporation. Extinguishing agents
that are of known ozone depleting nature or are suspected carcinogens are not
acceptable.
13.4 Hoses and Fittings
Fittings shall be galvanized malleable or ductile iron, black or galvanized steel, stainless
steel, copper or brass. Cast iron fittings shall not be used. Hose shall be, at minimum,
single wire braid, rubber hose conforming to and marked as SAE 100 R5 or SAE 100 R1.
13.5 System Actuation-Remote
Actuation of the agent cylinder valve(s) for distribution of the extinguishing chemical shall
be accomplished by a pneumatic control head. Actuation pressure of the pneumatic
control head shall be supplied by remote nitrogen cylinders independent of the agent
expellant pressure. Release of nitrogen gas from the remote cylinders shall be
accomplished by the manual striking of a palm button and, optionally, by the automatic
firing of an electrically initiated gas generating cartridge (squib).
13.6 Fire Detection
Detection of fires shall be accomplished by devices approved for use by Factory Mutual
Research Corporation as Heat Actuated Fire Detectors. The detectors shall be normally
open and shall be capable of carrying sufficient amperage for the purposes of firing the
gas generating cartridge (squib).
13.7 Suppression System Circuit Supervison
a. An electrical circuit monitor (circuit monitor plus) shall be provided for the
automatic suppression system. This circuit monitor shall provide electrical
supervision of the automatic fire suppression system POWER, HEAT
(22 pages)
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