Eaton Cutler-Hammer LMR Instructions Manual

IM05805001K 5Effective November 20033.11 Internal Connections3.11.1 Pump RunningThe LMR monitors the auxiliary contact of the main RUNcontactor. The auxilliary contact is factory connectedbetween terminal 33 on the main board and terminal49 on TB1. Upon detecting a contact closure, the PumpRunning LED will illuminate on the membrane display.3.11.2 Local StartThe Local Start pushbutton, is factory connected betweenterminals 34 on the main board and terminal 49 on TB1.The pushbutton is located on the enclosure flange.3.11.3 Emergency Start (MSH)The Emergency Start contact, MSH, a micro-switch activatedby the forward movement of the emergency handle, isfactory connected between terminals 40-49, and is initiatedby the actuation of the emergency handle. Upon detecting acontact closure, its respective LED will illuminate. Both 8CRand AT control relays will energize simultaneously thusstarting all motors across-the-line.3.11.4 Stop PushbuttonFactory connected between terminals 41-49, the STOPpushbutton will de-energize the main Run contactor(s)when depressed.For both automatic and semi-automatic operation, if thewater pressure is NOT restored, the pump will stop whilethe STOP pushbutton is depressed. Upon releasing theSTOP pushbutton, the pump will restart.After a manual start, the STOP pushbutton must be used tostop the fire pump. If the pump is started automatically viaa pressure drop, pressing the STOP pushbutton will resetthe controller.A restart time delay of 2 seconds between starting andstopping the pump allows the residual voltage of themotor to decay prior to the motor starting again.3.11.5 External ACK.ALARM / STEP PushbuttonsThe black pushbuttons located on the flange of the controllerare used to acknowledge alarms and reset the commonalarm relay, 3CR, in addition to stepping through thecontroller readings.The ACK.ALARM pushbutton is factory wired betweenterminals 47-49, and the STEP pushbutton between 48-49.3.12 Relay BoardThe Relay Board is equipped with seven (7) relays for bothfactory and user connection. Figure 2, page 14, clearly showsthe customer connections.Each relay consists of two (2) Form-C contacts. The relaydesignations are as follows:1CR: 1CR energizes for all starts regardless of the type-of-start request. 1CR energizes the interposing relay,8CR, which in turn energizes the contactor(s) to startthe fire pump.2CR: Upon the detection of a Phase Failure by thecontroller card, 2CR will de-energize and the Phase FailureLED, on the membrane faceplate, will illuminate. The 2CRrelay is programmed for fail-safe operation – therefore, it isenergized when conditions are normal and will de-energizeupon detec-tion of a Phase Failure. Terminals 65-66-67 arepre-wired to TB1. Terminals 68-69-70, on the Relay Board,provide an additional Form-C contact for the user.3CR: Upon the detection of any of the alarms listed inSection 4, 3CR will de-energize and the respective alarmLED, on the membrane faceplate, will illuminate. The 3CRrelay is pro-grammed for fail-safe operation – therefore, it isenergized when conditions are normal and will de-energizeupon detection of an alarm condition. Terminals 71-72-73are pre-wired to TB1.When the optional horn/bell is ordered, terminals 74-75control this device. Terminals 74-75-76, on the relay board,provide an additional Form-C contact for the user.4CR: This relay is used for all reduced voltage type ofcontrollers and is for factory use only. After a specified timethe acceleration relay switches the controller from reducedvoltage to full voltage. It is not used in across-the-line starters.5CR: Upon the detection of a Phase Reversal by thecontroller card, 5CR will energize and the Phase ReversalLED, on the membrane faceplate, will illuminate. Terminals83-84-85 are pre-wired to TB1. Terminals 86-87-88, onthe relay board, provide an additional Form-C contact forthe user.Refer to Section 3.5 of this manual for the Phase ReversalDIP Switch settings.6CR: The Future #1 relay is programmable by the user.Refer to Section 6 for programming.7CR: The ‘LRP’ relay is used to trip the shunt trip, housedin the Circuit Interrupter’s (CB) frame, upon detection of aLocked Rotor condition.4. Main Display PanelThe main display panel, located inside the enclosure behindthe plexiglass panel, serves many operator interfacefunctions (refer to Figure 4, page 16):• Status & Alarm LEDs• Pressure Reading• 3-Phase Voltmeter• 3-Phase Ammeter• Start & Stop Pressure Settings• Weekly Timer Setting• Status & Alarm Messages• Elapsed Time Meter (Hours)• Number of Operations• Programming FunctionsThe software version of the controller can either be viewedupon power up, on the LCD display, or on the Status printout(refer to 6.2).The controller will initially display pressure. To step betweenreadings, refer to Section 4.3.