Specifications

79 of 104
Discharges
The foam system shall be plumbed to the lower rear crosslay, lower front crosslay, left side of front
bumper, lower center crosslay, left rear outlet and front bumper turret.
System Electrical Load
The foam proportioning shall not impose an electrical load on the vehicle electrical system any greater
than five (5) amps at 12VDC.
Tank Selector
An electric valve shall be used for the foam supply valve. The foam supply valve shall be controlled at
the foam system control head for ease of operation. The supply valve shall be electric, remote
controlled, to eliminate air pockets in the foam tank supply hose.
Maintenance Message
A message shall be displayed on the control head to advise when system maintenance needs to be
performed. The message shall display interval for cleaning the foam strainer, cleaning for the water
strainers, and changing the hydraulic oil.
Flush System
The system shall be designed such that a flush mode shall be provided to allow the system to flush all
foam concentrate with clear water. The flush circuit control logic shall ensure the foam tank supply
valve is closed prior to opening the flush valve. The flush valve shall be operated at the foam system
control head for ease of operation. The valve shall be electrically controlled and located as close to the
foam tank supply valve as possible. A manual flush drain valve shall be labeled and conveniently
located.
FOAM GENERATING SYSTEM, CAF Bidder Complies: Yes ( ) No ( )
A 140 cfm capacity compressed air foam, shall be provided. The system shall supply six (6) discharges
with compressed air foam. It shall be capable of providing foam solution or compressed air foam from
any of the specified CAFS discharges simultaneously. In addition, the consistency of the compressed
air foam (wet to dry) from each discharge shall be adjustable. All CAF capable discharges shall have
the discharge valve control, air injection control, and discharge pressure gauge mounted in a group on
the operator's panel. Each CAF capable discharge shall feature a check valve to prevent reverse flows
of compressed air foam that is integrated into the discharge valve. The wafer check valve shall be a
type and design approved by the manufacturer of the discharge valve.
DISCHARGES TO CAF CAPABLE Bidder Complies: Yes ( ) No ( )
The front discharge, front turret, 3 crosslays, rear discharge discharges shall be capable of discharging
compressed air foam. There is no second pump on the vehicle
AIR COMPRESSOR, HYDRAULIC DRIVEN Bidder Complies: Yes ( ) No ( )
An oil flooded rotary screw compressor rated for at least 140cfm @ 150psig shall be provided. The
compressor shall be mounted in an area that allows for proper service and maintenance of the
components. The compressor shall be driven by a hydraulic drive system. The hydraulic drive system
shall be driven by the vehicle transmission through a PTO. All components of the system shall be sized
and rated for the system to deliver compressed air, uninterrupted, for up to two (2) hours at a time
without undue stresses, vibrations, or overheating. The air compressor shall be capable of delivering
the rated capacity of the compressor when the fire pump is delivering 250gpm @120psi from tank or
draft.
The hydraulic compressor drive system shall be comprised of a variable displacement piston type
hydraulic pump supplying a fixed displacement piston hydraulic motor. The displacement of the
hydraulic pump shall be controlled by a fixed orifice type, load sensing, hydraulic circuit. The hydraulic
system shall have a properly sized reservoir, cooler, filter(s) and accessory components. The
components shall be mounted in the vehicle body to facilitate routine maintenance operations. The