Instruction/ maintenance manual of the product LGB 6-20 Series Weil-McLain
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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 .
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.
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.
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).
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.
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.
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.
P art Number 550-141-816/0798 9 CSD-1 Control System – Propane gas Figure 5 Field wiring diagram.
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.
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 ”).
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 .
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