Specifications

70 of 104
Relief valve shall have a working range of 75 psig to 200 psig.
Outlet shall terminate below the framerails with a 2.50" National Standard hose thread adapter and
shall have a "do not cap" warning tag.
Control shall be located behind an access door at the right (passenger's) side pump panel.
PRESSURE CONTROLLER Bidder Complies: Yes ( ) No ( )
A pressure Governor shall be provided. An electric pressure governor shall be provided which is
capable of automatically maintaining a desired preset discharge pressure in the water pump. When
operating in the pressure control mode, the system shall automatically maintain the discharge pressure
set by the operator (within the discharge capabilities of the pump and water supply) regardless of flow,
within the discharge capacities of the water pump and water supply.
A pressure transducer shall be installed in the water discharge of the pump. The transducer
continuously monitors pump pressure sending a signal to the Electronic Control Module (ECM).
The governor can be used in two (2) modes of operation, RPM mode and pressure modes.
In the RPM mode, the governor can be activated after vehicle parking brake has been set. When in
this mode, the governor shall maintain the set engine speed, regardless of engine load (within engine
operation capabilities).
In the pressure mode, the governor system can only operate after the fire pump has been engaged
and the vehicle parking brake has been set. When in the pressure mode, the pressure controller
monitors the pump pressure and varies engine speed to maintain a precise pump pressure. The
pressure controller shall use a quicker reacting J1939 database for engine control (excluding Cat
engines).
A preset feature allows a predetermined pressure or rpm to be set.
A pump cavitation protection feature is also provided which shall return the engine to idle should the
pump cavitate. Cavitation is sensed by the combination of pump pressure below 30 psi and engine
speed above 2000 rpm for more than five (5) seconds.
The throttle shall be a vernier style control, with a large control knob for use with a gloved hand. A
throttle ready light shall be provided adjacent to the throttle control. A large .75" RPM display shall be
provided to be visible at a glance.
Check engine, and stop engine indicator lights shall be provided for easy viewing.
Large .75" push buttons shall be provided for menu, mode, preset, and silence selections.
The water tank level indicator shall be incorporated in the pressure governor.
A fuel level indicator shall be incorporated in the pressure controller.
A pump hour meter shall be incorporated in the pressure controller.
The pressure controller shall incorporate monitoring for engine temperature, oil pressure, fuel level
alarm, and voltage. Pump monitoring shall include, pump gearcase temperature, error codes,
diagnostic data, pump service reminders, and time stamped data logging, to allow for fast accurate
trouble shooting. It shall also notify the driver/engineer of any problems with the engine and the
apparatus. Complete understandable messages shall be provided in a 20-character display, providing
for fewer abbreviations in the messages. An automatic dim feature shall be included for night
operations.
The pressure controller shall include a USB port for easy software upgrades, which can be downloaded
through a USB memory stick, eliminating the need for a laptop for software installations.