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Weil-McLain LGB 6-20 Series manual

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Table of contents for the manual

  • Page 1

    P art Number 550-141-816/0798 Contents I . New installation .......... 2 II . Existing installation .... 4 III. Water and steam trim components .................. 4 IV. Gas piping ................... 5 V. Wiring ........................... 5 Sequence of operation ..... 8 Wiring procedure .............. 8 VI. Leak test procedure ... 1 0 VII. Operati[...]

  • Page 2

    P art Number 550-141-816/0798 2 LGB -6 to LGB -20 Ser ies 2 – Control S upplement I New installation 1 . R emove all bu r ners from base bo x assembly . Remo ve 3.95 mm natural gas main burner orifices in manifold. Install 2.40 mm propane gas main burner orifices. Use pipe dope sparingly only on male ends. Use pipe dope compatible with propane ga[...]

  • Page 3

    P art Number 550-141-816/0798 3 CSD-1 Control System – Propane gas Figure 1 Pilot burner assembly , typical Figure 2 Main flame sensor assembly I New installation – continued[...]

  • Page 4

    P art Number 550-141-816/0798 4 LGB -6 to LGB -20 Ser ies 2 – Control S upplement 1 . These instructions are for use with Propane Control Cartons as listed in Gas Control Arrangement, T able 2 (page 2). 2 . Remove jacket door(s) and access panel(s). 3 . Disconnect wiring and tubing from existing pilot burner and main flame sensor . 4 . Remove all[...]

  • Page 5

    P art Number 550-141-816/0798 5 CSD-1 Control System – Propane gas IV Gas piping 1 . Contact gas supplier to siz e pip es, tanks and regulator . a. Inlet gas pressure to manual main shut-off gas valve — minimum 11” W .C., maxim um 13” W .C. b. If pressure to gas valv e exc eeds 13” W .C., install 100% lock-up gas pressure regulat or upstr[...]

  • Page 6

    Part Number 550-141-816/0798 6 LGB-6 to LGB -20 Series 2 – Control Supplement P art Number 550-141-816/0798 7 CSD-1 Control System – Propane gas Figure 3 Wiring diagram SENSOR MAIN FLAME FIRING RATE CONTROL (WHEN USED) STAGE COMBINATION VALVE W/REGULATOR MAIN GAS VALVE - TWO MAIN GAS VALVE TERMINAL. FIELD WIRED TO GAS VALVE OR FIRING IGNITION C[...]

  • Page 7

    P art Number 550-141-816/0798 8 LGB -6 to LGB -20 Ser ies 2 – Control S upplement 1 . Operating control begins startup sequence. a. Limit control contacts are closed. 2 . Pilot proving module energized. a. Pilot solenoid opens. b. Pilot ignition spark begins. c . Pilot ignites. d. Pilot proves. 3 . Main flame proving module energized from pilot p[...]

  • Page 8

    P art Number 550-141-816/0798 9 CSD-1 Control System – Propane gas Figure 5 Field wiring diagram[...]

  • Page 9

    P art Number 550-141-816/0798 10 LGB -6 to LGB -20 Ser ies 2 – Control S upplement 1 . Remove red (MV) and blue (PV) wires from main gas valve. 2 . Close main test firing valve attached to the manifold. 3 . Check that both leak test valves are closed and remove plugs. 4 . Attach manometer to first leak test valve. 5 . Open first leak test valve a[...]

  • Page 10

    P art Number 550-141-816/0798 11 CSD-1 Control System – Propane gas This document is intended only as a supplement to the LGB Gas-Fired Boiler Manual . Follow all instructions in the Manual, including those regarding start-up (found in Section VIII, “Placing boiler in operation ”). A . This boiler is equipped with a pilot which must be lighte[...]

  • Page 11

    P art Number 550-141-816/0798 12 LGB -6 to LGB -20 Ser ies 2 – Control S upplement W eil-McLain 500 Blaine Street Michigan City , IN 46360-2388 http://www .weil-mclain.com VIII P arts list Figure 6 Ref . No. Descri ption Size Vendor /Part Nu mber Weil- McLain P art Number 1 Main flame sen sor Honeyw ell 392956 511-724- 274 Main bur ner with pilo [...]