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Weil-McLain FLAME GUARDIAN WC-1A manual

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Table of contents for the manual

  • Page 1

    P art Number 550-141-807/0298 LGB Gas–fir ed boiler Contents Flame Guardian WMBC -1A RM7895C Controller Electronic Pilot System IRI Control Supplement I . Installation ..................... 2 II . Gas piping ...................... 5 III. Wiring ............................. 5 IV. Startup ......................... 1 0 V. Sequence of operation 1 1 [...]

  • Page 2

    P art Number 550-141-807/0298 2 LGB (Series 2) — Control Supplement I Installation 1 . For use with LGB-6 through 12 boilers. 2 . L O CAL INSPECT OR MUST CER TIFY B OILER FOR IRI COMPLIANCE. 3 . Assemble pilot burner and flame sensor to main burners with pilot brackets. See Figures 2 and 3. Install ground wiring as shown in Figures 2 and 3. 4 . R[...]

  • Page 3

    P art Number 550-141-807/0298 3 Flame Guardian WMBC-1A Electronic Pilot System – IRI Figure 2 Q179 pilot burner assembly Figure 3 Main flame sensor assembly I Installation – continued LGB-A56 Locating Slot Igniter Sensor Q179 Pilot Burner 10-32 x 5/16“ Machine Screws(2) Ground Leadwire: Connect to WMBC P anel T erminal G2 (Ground T erminal) P[...]

  • Page 4

    P art Number 550-141-807/0298 4 LGB (Series 2) — Control Supplement 16 13 15 17 18 18 14 12 11 10 9 7 6 5 4 3 2 1 Boiler Jacket V ent to Outside Atmosphere Drip Leg Service V alve 9 Second motorized gas valve w/ on/off actuator 1 Manual main shut-off gas valve 2 Low gas pressure switch 3 Pilot manual shut-off valve 4 Motorized gas valve w/ on/off[...]

  • Page 5

    P art Number 550-141-807/0298 5 Flame Guardian WMBC-1A Electronic Pilot System – IRI 1 . Size gas piping considering: a. Diameter and length of gas supply piping. b. Number of fittings. c . Maximum gas consumption (including any possible future expansion). d. Allo wable pressure dr op from gas meter ou tle t to boiler . For pr essure dro ps, see [...]

  • Page 6

    Part Number 550-141-807/0298 6 LGB (Series 2) — Control Supplement P art Number 550-141-807/0298 7 Flame Guardian WMBC-1A Electronic Pilot System – IRI Figure 5 — WMBC-1A panel wiring schematic[...]

  • Page 7

    P art Number 550-141-807/0298 8 LGB (Series 2) — Control Supplement Figure 6 — WMBC-1A panel wiring diagram – factory wiring[...]

  • Page 8

    P art Number 550-141-807/0298 9 Flame Guardian WMBC-1A Electronic Pilot System – IRI Figure 7 — WMBC-1A field wiring diagram[...]

  • Page 9

    P art Number 550-141-807/0298 10 LGB (Series 2) — Control Supplement IV Start -up Low Fire Adjustment 1 . Disable high fire by disconnecting the blue wire in the two-stage gas valve. 2 . Connect manometer to gas manifold (manometer must be capable of measuring 0” to 14” W .C.). 3 . T urn on electrical power sup ply and g as supply t o boiler [...]

  • Page 10

    P art Number 550-141-807/0298 11 Flame Guardian WMBC-1A Electronic Pilot System – IRI V Sequence of operation 1 . Operating control begins startup sequence: a. Limit control contacts are closed. b. Purge timer is energized. 2 . Flame safeguard control pilot circuit energizes after 2.0 seconds. a. Pilot gas valve opens. b. Ignition transformer ene[...]

  • Page 11

    P art Number 550-141-807/0298 12 LGB (Series 2) — Control Supplement W eil-McLain 500 Blaine Street Michigan City , IN 46360-2388 http://www .weil-mclain.com VI P arts list – T able 3 Description Size Vendor/Part Number Weil-McLain Part Number Primary Control Honey well RM789 5C1012 510-35 0-431 Prepurg e Timing Card 2 .0 Seco nds Honey well ST[...]