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10/24/97 FRI 16:02 FA% W W GOETSCH f�019 � � Sequence Of Operation FTA Limited Service Controllers 75Q � INTRODUCT/ON t M is energized.The pump motor will stop only Reference,to Wiring Schematic, Publication after the minimum run time is complete an�1 system WS750-10 will be essential in following this pressure is above the stop (high)setting cf 1 PS Seque�ce.of Operatlon. (see note 10,WS750-10). The Ilne numbers referred to in the text.appear to 3. If the jumperis removed from 12 and 13 arni placed the left side on the Wiring Schematic. between 11 and 12, minimum run time bec�ins The numbers to the �ght of the contacto�or aiter the system pressure is restored to th��stop co�trol relay coil symbols (1M, 1CR, 2CR,eta) a�e (high) setting of pressure switch 1PS. the line numbers on which the contactor or control 4. The minimum run timer may be disabled ior relay contects a�e located.A line under the number automatic start/manual stop by using�o jumpers indlcates a normally closed contact. Numbers with between terminals 11, 12 and 13,in which :,ase the no line are no�mally open contacts. Numbers above motor will run until manually shut down by which a T appears indicate a timed contact. depressing the"Stop" pushbutton. 5. When the system pressure drops to the st.art (low) ENERG/Z1NG THE CONTROLLER setting of pressure switch 1PS, control rel.�y 2CFi, 1. Close the circuit breaker by moving the handle energizes and seals itself with a normally��pen to the"On" position. NOTE-The motor may contact. 1CR deenergizes when the norm��lly give a slight bump due to the time delay closed contact of 2CR opens. 1CR contacts between closing the breaker a�d energiiing close, energizing motor contaCtor 1M. Reie�to relay 1CR.To preve�t this slight bump, "PUMP MOTOR STARTING SEpUENCE",below. depress and hold the"Stop" pushbutton until 6. The pump motor w(II ru� until: the circult breaker has closed. a. System pressure rises to the stop (high) 2. The phase monitor, FTA435, energizes, e�erglzing setting of 1 PS and; relay 4CR.The phase monitor also lights the"Power b. Minimum run timer 1TR times out oF�ening On" pilot light. 1TR contact, deenergizing relay 2CF.. 3. Upon energiZing the controller, other devices Normally closed 2CR Contacts close remain deenergizing unless there is a call to energiiing 1CR. The normally closecl 1CR start from pressure switch 1 PS, or from the contaCts open,deenergizing motor "Sta,rt" pushbuttons, or the deluge valve.The contactor 1 M,stopping the motor. deluge valve contacts are only operational if 7, When the above conditions are met and 1CF1 is the jumper hes been removed betwesn again energized, the cont�oller is i�the st��ndby terminals 8 and 10. If engaged,the Emergency cond'Rion and ready to start the pump mo�:or Run Mechanism wi�l cause the pump motor to should a start signal be received. run as described in "EMERGENCY RUN MECHANISM" below. A11?OMAT/C STAAT-MANUAL STOP 4. The controller is now ready to start the pump The pump motor is sterted by pre.ssure switcli motor shauld a start slgnal be received. 1 PS or deluge valve DV but must be stopped AUTOMAT/C START AND STOP manually with the"Stop"pushbutton.Jumpers between terminals 11, 12,and 13 must be removed 1: Pressure switch 1 PS initiates the automatic (see note 10, WS750-10). start and stop circuits for the pump motor_ �, The controlle�starts automatically when s�stem However,the pump motor stop mode is deter- pressure drops to the start(low)setting ot mined by minimum run timer 1TR and the pressure switch 1 PS control relay 2CR jumpers connected between terminals 11, 12, energizes, deenergizing 1CR a�d energiziiig a�d 13. The stop mode can function in one of motor contactor 1 M. Control relay 2CR seals three ways. The minimum run timer functlons itself. The controller will then proceed thrc�ugh in the following manner the starting sequence_ Refer to"PUMP MC)TOR 2. The factory setting includes a jumper between gTARTING SEQUENCE"below.The minimum terminels 12 and 13, and �o jumper betwee� run timer hes no effect on this operstion. terminals 11 and 12. In this mode, minimum run time begins when the pump motor contacto� I r%I'�/'�O�l�/I�C. Fire Pump Control Division