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Opening of Bids - Two (2) More or Less Custom Rear Mount Pumpers Spec C - Sentinel Emergency Solutions
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Opening of Bids - Two (2) More or Less Custom Rear Mount Pumpers Spec C - Sentinel Emergency Solutions
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Board of Public Works
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Projects
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9/8/2020
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fromthedischargesideofthe pump for coolingtheengine water. Heat exchanger shall be <br />cylindricaltypeandshallbe a separate unit.Itshallbeinstalledinthepump orengine <br />compartmentwith the control locatedon the pump operator's controlpanel. ExchangershallYES/NO <br />be plumbedto themaster drain valve. <br />INTAKE RELIEF VALVE <br />An Akron Brassrelief valve shallbeinstalledon thesuctionsideofthe pumppresetat 150 <br />psig. <br />Reliefvalve shall have a workingrangeof 75psig to 250 psig. <br />Outlet shallterminate below the framerails with a 2.50" NationalStandardhose thread <br />adapterandshall have a"do not cap" warningtag. <br />YES/NO <br />Control shall belocated behindan access doorat theright(passenger's)side pump panel. <br />PRESSURE CONTROLLER <br />A Fire Research Corporation Pressure Governor shall be provided. An electricpressure <br />governorshallbe providedwhichiscapableof automaticallymaintaininga desired preset <br />discharge pressureinthewater pump.Whenoperating in thepressure controlmode, the <br />systemshallautomaticallymaintainthedischargepressureset bythe operator (withinthe <br />discharge capabilitiesofthe pump and water supply)regardlessofflow, within the discharge <br />capacities ofthe water pump and watersupply. <br />A pressure transducer shallbe installedin the waterdischarge of the pump. Thetransducer <br />continuouslymonitors pump pressuresending a signalto the Electronic Control Module <br />(ECM). <br />The governor can be used in two (2)modes ofoperation, RPM modeandpressuremodes. <br />In the RPMmode, the governorcanbe activatedaftervehicleparkingbrake hasbeenset. <br />Wheninthis mode,thegovernor shallmaintainthesetengine speed,regardless ofengine <br />load(within engineoperation capabilities). <br />In the pressuremode,thegovernor systemcanonlyoperateafterthefire pumphas been <br />engaged andthevehicle parkingbrake hasbeen set.When inthe pressuremode,the pressure <br />controllermonitorsthe pumppressure and variesengine speedtomaintain aprecisepump <br />pressure. The pressure controller shallusea quickerreactingJ1939database forengine <br />control.(excluding Catengines) <br />A presetfeatureallowsa predeterminedpressure orrpm to be set. <br />A pump cavitation protection featureisalsoprovidedwhichshallreturntheengine toidle <br />should the pumpcavitate.Cavitationissensed bythecombination of pump pressurebelow <br />30 psi andengine speedabove 2000rpm formore than five (5)seconds. <br />The throttle shall bea Vernierstylecontrol, with alarge control knob for use witha gloved <br />hand. A throttlereadylightshall beprovided adjacent to thethrottle control. Alarge .75" <br />RPM display shall be provided tobevisibleat a glance. <br />Check engine andstop engine indicatorlightsshallbeprovidedforeasy viewing. <br />Large.75"pushbuttonsshallbe providedformenu,mode, preset,andsilenceselections. <br />The watertanklevelindicator shall beincorporatedinthe pressuregovernor. <br />PDF created with pdfFactory Pro trial version www.pdffactory.com <br /> <br />
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