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An Akron Brass relief valve shall be installed on the suction side of the pump preset at 150 <br />psig. <br />Relief valve shall have a working range of 75 psig to 250 psig. <br />Outlet shall terminate below the frame rails with a 2.50" National Standard hose thread <br />adapter and shall have a "do not cap" warning tag. <br />Control shall be located behind an access door at the right (passenger's) side pump panel. <br />3RESSURE CONTROLLER <br />A Fire Research Corporation Pressure Governor shall be provided An electric pressure <br />governor shall be provided which is capable of automatically maintaining a desired preset <br />discharge pressure in the water pump. When operating in the pressure control mode, the <br />system shall automatically maintain the discharge pressure set by the operator (within the <br />discharge capabilities of the pump and water supply) regardless of flow, within the discharl <br />capacities of the water pump and water supply. <br />A pressure transducer shall be installed in the water discharge of the pump. The transducer <br />continuously monitors pump pressure sending a signal to the Electronic Control Module <br />(ECM). <br />The governor can be used in two (2) modes of operation, RPM mode and pressure modes. <br />In the RPM mode, the governor can be activated after vehicle parking brake has been set. <br />When in this mode, the governor shall maintain the set engine speed, regardless of engine <br />load (within engine operation capabilities). <br />In the pressure mode, the governor system can only operate after the fire pump has been <br />engaged and the vehicle parking brake has been set. When in the pressure mode, the pressu <br />controller monitors the pump pressure and varies engine speed to maintain a precise pump <br />pressure. The pressure controller shall use a quicker reacting J1939 database for engine <br />control. (excluding Cat engines) <br />A preset feature allows a predetermined pressure or rpm to be set. <br />A pump cavitation protection feature is also provided which shall return the engine to idle <br />should the pump cavitate. Cavitation is sensed by the combination ofpump pressure below <br />30 psi and engine speed above 2000 rpm for more than five (5) seconds. <br />The throttle shall be a Vernier style control, with a large control knob for use with a gloved <br />hand. A throttle ready light shall be provided adjacent to the throttle control. A large .75" <br />RPM display shall be provided to be visible at a glance. <br />Check engine and stop engine indicator lights shall be provided for easy viewing. <br />Large .75" push buttons shall be provided for menu, mode, preset, and silence selections. <br />The water tank level indicator shall be incorporated in the pressure governor. <br />A fuel level indicator shall be incorporated in thepressure controller. <br />A pump hour meter shall be incorporated in the pressure controller. <br />The pressure controller shall incorporate monitoring for engine temperature, oil pressure, <br />fuel level alarm, and voltage. Pump monitoring shall include, pump gearcase temperature, <br />error codes, diagnostic data, pump service reminders, and time stamped data logging, to <br />allow for fast accurate trouble shooting. It shall also notify the driver/engineer of any <br />2roblems with the engine and the apparatus. Complete understandable messages shall be <br />58 <br />