Weil-McLain LGB-4 manual

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Table of contents for the manual

  • Page 1

    P art Number 550-141-918/0304 LG LG LG LG LG B B B B B Refer to LGB LGB LGB LGB LGB • Installation • Start-Up • Service • P arts Manual for additional information Control Sup plement must only be used by a qualified installer/ser vice technician. Read all instructions before installing. Failur e to follow all instructions in pro p er order [...]

  • Page 2

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Cont rol Suppl em ent • UCS • N at. Gas 2 Figure 1a Pilot burner assembly Figure 1b Pilot location I nstall pilot burner . See Figures 1a and 1b. Follo w Figure 1b for pilot burner location, placing the burner with pilot bracket in the fourth position from the [...]

  • Page 3

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Control Supple ment • UCS • N at. Gas 3 T able 1 Gas supply pipe capacities 1 . Size natural gas piping from T able 1. Size piping to pr ov ide proper inlet pr essure to gas valv e w hen operating at rated input. a. Inlet gas press ure to manual main shut-off g[...]

  • Page 4

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Cont rol Suppl em ent • UCS • N at. Gas 4 III Wiring[...]

  • Page 5

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Control Supple ment • UCS • N at. Gas 5 Figure 2 Wiring diagram Sequence of operation 1 . Operating control begins start-up sequence. a. Limit control contacts are closed. 2 . Ignition control module energized. a. Pilot gas valve opens. b. Pilot ignition spark [...]

  • Page 6

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Cont rol Suppl em ent • UCS • N at. Gas 6 A. This boiler is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand. B. BEFORE OPERATING , smell all around the boiler area for gas. Be sure to smell next to th[...]

  • Page 7

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Control Supple ment • UCS • N at. Gas 7 V V erification testing Before starting boiler for the first time and at least annually (during annual inspection and start-up), follow the procedures below to verify boiler controls are operating correctly and that autom[...]

  • Page 8

    P art Number 550-141-918/0304 LGB LGB LGB LGB LGB -4 -4 -4 -4 -4 & 5 5 5 5 5 • Cont rol Suppl em ent • UCS • N at. Gas 8 W eil-McLain 500 Blaine Street Michigan City , IN 46360-2388 http://www .weil-mclain.com Figure 3 Control and gas components VI P arts list[...]