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10/24/97 FRI 16:04 FA% � w GOETSCH �021 <br /> , - <br /> Sequence of Operations FT,,q� <br /> Jockey Pump Controller 500 <br /> � <br /> �n�rRovucno,v <br /> The purpose of the jockey pump control- 2. For automatic operation with a minimum ru�, <br /> ler and jockey pump is to boost small volume period. controllers are provided with function <br /> drops in pressure with a sma11 pump to avoid TR, an adjustabie timing device located atop <br /> unnecessary cycfing of a large fire pump. contactor M, which will be held energized fo��a <br /> preset time. The purpose of the�ming device <br /> 1. The jockey pump controller selector is to eliminate unnecessary cyciing of the <br /> switch (H-O-A) allows the conVoller to be jockey pump for smali pressure changes. <br /> pre-set as follows: Some controllers may provide the timing <br /> A. Manual in "H" hand. function by means of a separate relay, TR, and <br /> B, Off in "O". timed timing head contacts TR to hold <br /> C. Automatic operadon in the "A"posi- contactor M energized for a pre-set time eve� <br /> tion. though the pressure has been restored. <br /> MANUAL OPERATION 3. 8ranch circuit conductor protection may be <br /> Upon switching from "O"to "H�, the M provided by line fuses 1� 2, 3 FU o�by a circuit <br /> contactor coil will electrically be energized breaker depending upon conflguration. <br /> closing M contacts on L1A, L2A, L3A, start- <br /> ing and running the motor. The motor will 4, Various options such as controt arcuit opera- <br /> continue to run unless there occurs: tion from low voltage cantrol circuit transformer <br /> A. A major fault opening fuses 1, 2, 3 T1, may be selected. Qther modifications such <br /> FU. as pilot lights and alarms may be added de- <br /> a. A motor overload opening normally pending upon customer selectiens. <br /> closed contacts OL on wi�e 6. The <br /> overload relay will remain tripped unti( <br /> manually reset after clearing the <br /> overload condition. <br /> C. The main selector switch is returned <br /> to 'O"for off. <br /> AUTOMATIC OPERATION <br /> 1. Automatic operation is the same except <br /> that the pump motor contactor M is <br /> energized by a drop in pressure sensed <br /> by pressure switch PS. <br /> . riretrol; Inc. <br /> s Industria/ Contro! Div�sion 0� <br /> 10fi MacKenan Drive• P.O. Bvx 9000•Cary, NC 27512• FAX (919) 460-5250�(919�460-5200 <br />