Class 1 Pressure Governor Operator`s Manual
Contents
1. and decrease commands from the INC and DEC switches within the operating capabilities of the engine When the INC switch is pressed INCREASE is displayed in the message center When the DEC switch is pressed DECREASE is displayed Each time the INC or DEC switch is released the current en gine RPM is maintained by the governor and the message cen ter will display RPM to indicate that the governor is active and which mode it is operating in When the PTO Engaged Interlock is active pressure mode can be selected and governor operation is identical to RPM mode except that PSI is displayed instead of RPM and the PRES SURE LED will be illuminated Ss i MESSAGE CENTER NO INTLK PUMP ENGAGED OKAY TO PUMP THROTTLE READY MESSAGE CENTER RPM PUMP ENGAGED O OKAY TO PUMP THROTTLE READY MESSAGE CENTER INCREASE PUMP ENGAGED OKAY TO PUMP THROTTLE READY MESSAGE CENTER DECREASE PUMP ENGAGED O OKAY To PUMP THROTTLE READY MESSAGE CENTER RPM O PUMP ENGAGED O OKAY To PUMP THROTTLE READY MESSAGE CENTER PSI PUMP ENGAGED OKAY To PUMP THROTTLE READY Operation Whenever you desire to return to idle press the IDLE switch with a firm positive switch depression The message center will display IDLE REQ and the engine speed will be reduced to normal idle This clears the govern2. AGE CENTER MODE PUMP ENGAGED OKAY To PUMP THROTTLE READY Operation When operating in pressure mode once the pump pressure exceeds 70 PSI the governor will monitor the pump discharge pressure and respond to changes in pressure by modulating engine pump speed If the discharge pressure drops and the governor is unable to regain pressure within 4 seconds the Message Center will flash INTAKE to indicate an insufficient water supply the gov ernor will then reduce speed to the point that the pressure was last achieved At this time the Message Center will display OP ERATOR and will no longer attempt to automatically regulate a decrease in pressure until the pump operator presses the DEC INC or PRESET switches The governor will respond to an increase in pressure if it occurs If the pump discharge pressure drops below 30 PSI for more than 5 seconds the governor will return the engine to idle LOSUPPLY will be displayed in the message center The gov ernor enters it s initial power up state and a mode must be se lected to enable governing again noTE While the governor is determining cavitation the dis charge pressure drop will be treated normally Thatis the en gine will be commanded to increase speed to compensate for the pressure reduction within the Trim Limit This could result in the engine running at a speed that can cause a pressure spike eS 6 i MESSAGE CEN
3. TER PSI PUMP ENGAGED OKAY TO PUMP THROTTLE READY MESSAGE CENTER INTAKE PUMP ENGAGED O OKAY To PUMP O THROTTLE READY MESSAGE CENTER OPERATOR PUMP ENGAGED O OKAY TO PUMP O THROTTLE READY MESSAGE CENTER INTAKE PUMP ENGAGED O OKAY TO PUMP THROTTLE READY MESSAGE CENTER LOSUPPLY PUMP ENGAGED OKAY To PUMP THROTTLE READY MESSAGE CENTER MODE PUMP ENGAGED O OKAY TO PUMP O THROTTLE READY
4. This is to prevent high pressures from being introduced by a distracted operator New Messages OPERATOR will be flash anytime the governor can t achieve a desired pressure This indicates that the governor will not increase engine speed until the pump operator intervenes INTAKE will be displayed anytime the governor is operating in pressure mode and the discharge pressure drops below 30 PSI If pressure remains below 30 PSI the display will change to LoSupply and engine speed will be reduced to idle When LoSupply is displayed the governor is no longer active and the operator must ensure an adequate water supply and reinstate governing using the MODE Switch and either INC or PRESET OPERATOR will be flashed anytime the governor can t achieve a function or pressure This indicates that the governor will not increase engine speed until the pump operator intervenes CTRL INC will be flash in the display if the governor cannot regain the set pressure It will change to OPERATOR flashing if pressure cannot be regained within 4 seconds During these periods the governor will not command an increase in engine speed and will return to the last known engine speed command where the setpoint was achieved 4 1U a i When the governor is initially powered up neither the RPM nor the PRESSURE LED will be illuminated If the IDLE Switch is held on prior to power being applied the informa tion will remain in the message center as long the IDLE Swit
5. Throttle will be the first mode RPM Mode When the unit is in RPM mode the display will read THROTTLE and the green RPM LED will be illuminated Engine speed is controlled by the INCrease and DECrease switches the display will indicate INCREASE or DECREASE as appropriate when these switches are depressed The governor will maintain the last output signal attained with these switches The engine will maintain an RPM appropriate for the throttle signal being sent NOTE IF WHILE OPERATING IN RPM MODE THE PRESSURE INCREASES MORE THAN 50 PSI FROM THE PRESSURE LOGGED AT THE LAST SWITCH PRESS THE GOVERNOR WILL LIMIT THE PRESSURE INCREASE TO NO MORE THAN A 50 PSI DIFFERENTIAL THE GOVERNOR MAY REDUCE ENGINE RPM TO ACHIEVE THIS AND THE MESSAGE PSI LIMIT wit BE DISPLAYED IN THE MESSAGE CENTER NOTE THE GOVERNOR WILL NOT ATTEMPT TO REGULATE PRESSURE IN THIS MODE ONLY LIMIT THE DIFFERENTIAL PRESSURE TO 50 PSI FROM THE PRESSURE PRESENT WHEN THE LAST SWITCH WAS PRESSED Pressure Mode When the unit is operating in the Pressure mode the display will show PRES SURE and the amber PRESSURE LED will be illuminated Pump pressure is set by using the INCrease and DECrease switches The governor will attempt to maintain the last pressure achieved with these switches The display will indicate INCREASE or DECREASE as appropriate The governor maintains pump pressure by controlling engine RPM in response to a signal from the pressu
6. at is set in memory Idle Mode Pressing the IDLE switch at any time returns the engine to idle speed NOTE A FIRM POSITIVE SWITCH DEPRESSION IS NECESSARY TO ACTIVATE THIS FEATURE AND A QUICK PRESS MIGHT BE IGNORED SENSOR Whenever the transducer signal is below 0 3 VDC or above 4 8 VDC a sensor fault will be logged and SENSOR will be displayed in the message center SENSOR will flash if the failure occurs while operating in PSI Mode Once a failure is detected the gover CAUTION nor can no longer maintain a pressure setting It will hold the current engine RPM and only operate as a throttle Once the SENSOR message is displayed it will not clear until power to the governor is reset It is extremely important that the cause for this message is investigated The governor cannot control discharge pressure properly unless the sensor signal is reliable and cor rect Switch Session Pressure Increase If the INC switch is held the governor will not allow a change greater than 80 PSI without releasing the INC switch and pressing it again This is only applicable when the discharge pressure is above 90 PSI This function prevents high pressures from being introduced by a distracted operator Pressure Water Loss If the discharge pressure drops below 30 PSI for any reason engine speed will not be increased The governor output voltage will reduce to the last known value engine RPM where the pressure setpoint was obtained The
7. ch is depressed At this point the operator must select an operating mode with the MODE switch before the governor will operate The governor will check for a valid pressure transducer sig nal at power up if none is found SENSOR will be displayed in the message center The governor will operate but will not be able to maintain a pump pressure If no interlocks are established NO INTLK will be displayed in the message center when the MODE switch is pressed and the governor will not respond to an increase or decrease request If only the OEM throttle interlock is active you may select RPM mode and RPM will be displayed C manuals Uni Gov V6 107490 Operation MESSAGE CENTER IDLE REQ PUMP ENGAGED OKAY TO PUMP THROTTLE READY MESSAGE CENTER V6 0b444 PUMP ENGAGED O OKAY To PUMP THROTTLE READY MESSAGE CENTER MODE O PUMP ENGAGED O OKAY To PUMP O THROTTLE READY MESSAGE CENTER SENSOR PUMP ENGAGED O OKAY TO PUMP THROTTLE READY MESSAGE CENTER NO INTLK PUMP ENGAGED OKAY TO PUMP THROTTLE READY MESSAGE CENTER RPM PUMP ENGAGED O OKAY To PUMP e THROTTLE READY Operation If you attempt to select pressure mode NO INTLK will be dis played when the MODE switch is pressed and the governor will revert to RPM mode and RPM will be displayed The governor will respond to increase
8. display will flash INTAKE during this low pressure condition If the pressure in creases above 30 PSI OPERATOR will flash and the governor will not increase output unless the operator presses the INC or PRESET switches If pressure above 30 PSI is not regained within 5 seconds the governor will return the engine to idle and display LoSupply The operator must make certain that the water supply is adequate and then reinstate governing using the MODE INC and or PRESET switches Pressure Recovery Cavitation TRIM The governor has a trim adjustment this can be set between 5 and 20 of maximum throttle This parameter limits the governor s maximum increase in a pressure recovery attempt The message center will flash OPERATOR when this limit is reached and the RPM will not increase further The operator must take positive action to restore discharge pressure If pressure is not restored within 4 seconds the governor will reduce output to the last known output where pressure was maintained The operator must input a new setpoint with the INC DEC or PRESET switches If the pressure rises above the original setpoint and the governor controls a decrease in engine speed the governor will return to normal operation and PSI MODE is displayed C manuals Uni Gov V6 107490 3 v amp Features Version Display While the governor is at idle and MODE is being displayed if the IDLE switch is depressed for 7 seconds the message center will scro
9. http CLASS 1 PRESSURE GOVERNOR OPERATOR S MANUAL Gauges Flowmeters Electronic Controls Plumbing Components And More PRESET 607 N W 27 Avenue Ocala Florida 34475 Phone 352 629 5020 FAX 352 629 2902 www class1 com Overview Electronic Engine Pressure Governor The Class1 Pressure Governor is designed to maintain a selected pump pressure or engine speed setting This unit will work with electronically controlled engines that accept a variable analog voltage signal 0 5 VDC or a Pulse Width Modulated Signal PWM 12 87 at 400 Hz as a remote accelera tor throttle signal Included in the package The standard governor control is shipped with the following components Package 105244 Package 105246 Governor Control C1 PN 107396 107269 Pressure Transducer C1 PN 100581 100581 User Manual C1 PN 107490 107490 Installation Harness C1 PN 105247 Not Included Modes of Operation Power On When the unit is first powered up the display will show MODE and the engine will remain at idle until the mode switch is pressed to select the desired operating mode PSI MODE or RPM MODE There is an internal relay that should be used to turn on the remote throttle at the engine ECU This relay will not energize until the MODE switch is pressed and a valid throttle ready input is present at Pin 2 of the 12 pin connector If the pump is engaged and the OK to Pump LED is illuminated PRESSURE will be the first mode selected otherwise
10. ll through the version number governor settings and I O voltage When the sequence is complete the display will return to MODE and normal operation is available PSI Enable The pressure governor will not control pressure until a discharge pressure of 70 PSI is attained It will act as a throttle until this pressure point is achieved Setting PRESET If the PRESET switch is the held down for 10 seconds after a Power On Cycle before pressing any other switch the governor will enter the PRESET programming mode Selecting Engine Type Only the INC and PRESET switches are active in the engine selection menu Selecting the engine type is only necessary at first power on of anew governor RPM Preset Disable If there is pressure on the pump transducer or the Pump Engaged Interlock is active RPM Preset is disabled and a DISABLED message will be displayed in the Message Center Pressure Preset While the governor is attempting to reach the preset PSI the increase is tested at intervals and if the pressure is not increasing the governor will maintain the engine speed at the point the pressure stops increasing and uses that as the pressure setpoint High Idle The High Idle feature is disabled if there is gt 10 PSI at the pump transducer Switch Session Pressure If the INC switch is held and the operating pressure is above 90 PSI the governor will not allow a change greater than 80 PSI without releasing the INC switch and pressing it again
11. or of any pressure or RPM set points and MODE will be displayed in the mes sage center The PRESET switch can be used anytime after an operating mode has been chosen to promptly bring the engine or pump to the preset point The message center will display PRESET while the engine is being adjusted and then either RPM or PSI will be dis played dependent on the operating mode selected While the governor is powered up and the OEM Throttle In terlock is active a remote High Idle function is available A 12 volt input is available to activate this feature This feature will not activate ifa governing mode has been selected the pump engaged interlock is active or the throttle interlock is lost If the High Idle is active it will drop out if the pump is engaged or the throttle interlock is lost While the high idle feature is active Highldle will be displayed in the message center The INC and DEC switches are active in the High Idle Mode C manuals Uni Gov V6 107490 MESSAGE CENTER IDLE REQ PUMP ENGAGED okay To Pump THROTTLE READY MESSAGE CENTER MODE Pump ENGAGED okay To pumP THROTTLE READY MESSAGE CENTER PRESET Pump ENGAGED okay To PumP THROTTLE READY MESSAGE CENTER RPM MODE PUMP ENGAGED okay To pump THROTTLE READY MESSAGE CENTER P SI MODE PUMP ENGAGED okay To Pump THROTTLE READY MESS
12. re transducer mounted on the pump When controlling in this manner the display will show CTRL DEC or CTRL INC Switching between modes Pressing the mode switch will change the governor from RPM to Pressure mode without a significant change in engine speed or pump pressure The message center will indicate PRESSURE or THROTTLE as appropriate once the mode change has been made When switching to PRESSURE the pressure setpoint is whatever pressure is on the transducer at the change 2 a i Overview Preset Mode Pressing the PRESET switch in either mode will control the engine to attain the preset RPM or pump pressure programmed in governor memory If there is more than 10 PSI pressure on the pump the RPM Preset is disabled and the Message Center will display DISABLED High Idle Mode An input is available to bring the engine speed to a PRESET RPM High Idle from a remotely mounted switch While operating in this mode the display will show HIGHIDLE This function is inoperative when the pump engaged input is active there is more than 10 PSI on the pressure transducer or if the MODE switch on the governor has been pressed Pressing the IDLE switch causes the high idle to drop out and the high idle input must be toggled off and then on again to reinstate high idle The INC and DEC switches are active in high idle mode and the engine speed can be adjusted changing engine speed in this manner will not change the preset RPM th
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