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COMMERCIAL POWER BURNER BOILER
REPLACEMENT PARTS LIST
COPPER BOILERS FOR HYDRONIC
WIRING/HARNESS & PROBES
See page 12 HEATING & HOT WATER SUPPLY
PROPANE GAS TRAIN ASSEMBLY
LEGEND MODELS LB/LW: 500, 750 & 1000
See pages 8-10
SERIES: 400 - 401
NATURAL GAS
TRAIN/BLOWER
ASSEMBLY
See pages 5-7
JACKET/FRAME ASSEMBLY
See page 4
WATERWAYS &
COMBUSTION
CHAMBER
See page 2
CONTROL BOARD
See page 11
BY-PASS
See pages 8-10
EXHAUST & DRAIN
ASSEMBLY
See page 3
WATER INLET
See page 3
A.O. Smith Water Heater Pa
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LB/LW WATERWAYS & COMBUSTION CHAMBER PARTS LIST Item Description Model 500 Model 750 Model 1000 1 ................ Bracket ........................................................................................ 191602 ........................ 191602 .................... 191602 2 ................ Burner, Assembly ........................................................................ 211615 ...................... 211615-1 .................211615-2 3 ................ Combustion Chamber Assembly
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LB/LW EXHAUST, DRAIN & WATER INLET ASSEMBLY PARTS LIST Item Description Model 500 Model 750 Model 1000 1 ................ Clamp, Hose (Large) .......................................................................... 191794-1 .............. 191794-1 ............. 191794-1 2 ................ Clamp, Hose (Small) .......................................................................... 191794-3 .............. 191794-3 ............. 191794-3 3 ................ Nut, Hex .............................
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LB/LW JACKET/FRAME ASSEMBLY Item Description Model 500 Model 750 Model 1000 1 .......... Bolt, Machine 5/16" - 18 .............................................................. 191358-1 .....................191358-1 ....................191358-2 2 .......... Control Panel Assembly .............................................................. 210601-1 .....................210601-1 ..................... 210601 3 .......... Display Board (LB Models) .................................................
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LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY- MODEL 500 Item Description Model 500 Item Description Model 500 1 ....Blower..............................................................211613 20 ....Nut, Hex 1/4" ..................................................... 170272 2 ....Blower Adapter Assembly ...............................191645 21 ....Orifice, Air ......................................................... 192737 3 ....Blower Manifold Asse
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LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY- MODEL 750 Item Description Model 750 Item Description Model 750 1 ..... Blower .............................................................191652-1 21 ....Nut, Hex 1/4" ..................................................... 170272 2 ..... Blower Adapter Assembly ............................... 191645 22 ....Orifice, Air ........................................................192737-2 3 ..... Blower Manifold Assembly .............................. 191832 2
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LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY - MODEL 1000 Item Description Model 1000 Item Description Model 1000 1 .....Blower................................................................ 192195 24 ....Orifice, Air (Series 300 - Nat. Gas)..................192737-3 2 .....Blower Adapter Assembly ................................192215-1 24 ....Orifice, Air (Series 30211 - L.P. Gas) ..............192737-2 3 .....Blower Manifold Assembly ................................ 192217 25 ....Orifice, Union (
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LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 500 Item Description Model 500 Item Description Model 500 10 ....Elbow, 90° Street, 1" ................................................ 190763 1 .....Valve, Main Gas ...............................................191956-1 11 ....Elbow, 90°, 1" .......................................................... 1630 2 .....Regulator, LP ..................................................... - - - - - 12 ....Nipple, 1" ...............................................
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LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 750 Item Description Model 750 Item Description Model 750 1 .......Valve, Main Gas ............................................. 77780 12 .......Nipple, 1-1/4" ........................................................ 86505-3 2 .......Regulator, LP ................................................ 192460 13 .......Nipple, 1-1/4" ...........
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LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 1000 Item Description Part No. Item Description Part No. 1 ...... Valve, Main Gas, LP 300 Series ................... 77780 10 ...... Elbow, 90 Street 1-1/4” ................................. 94516 2 ...... Regulator, LP 301 Series ............................ 192460 11 ...... Elbow, 90 1-1/4” .......................................... 192216 3 ...... Valve, Firing..................................................3423-3 12 ...... Nipple, 1-1/4” w/Tapping..
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LB/LW CONTROL BOARD WHC 1502 Part Number 210128 LB/LW WIRING CHART COLOR GAUGE PART NUMBER *** White 14 41974 Black 14 99650 Green 14 41972 White 16 86580 Black 16 86578 Green 16 69058 White 18 170595 Black 18 170596 Green 18 170606 Blue 18 191719 Red 18 170603 Yellow 18 170604 Brown 18 170890 White/Red 18 191700 White/Yellow 18 191702 White/Black 18 191699 Black/White 18 191694 Yellow/Blue 18 191708 Red/Green 18 191717 *** Use dash number to indicate length of wire. Example: 20 inch
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LB/LW WIRING AND HARNESS ASSEMBLY 78468 99593-6 78469 191673 42573 210091 210152 99599-2 22-16 Ga. 16-14 Ga. 22-18 Ga. #10 Stud 22-18 Ga. Ignition Harness Assembly 210575 Tank Probe Pressure Flow Switch Harness Assembly Harness Assembly 210604 210576 Power Harness Assembly 210579-1 (-0 0n -500 Models Only) Transformer Gas Valve Harness Assembly Harness Assembly Blower 210574-1 (Propane) Harness Assembly 210578 (Model 1000) 210574-2 (Nat. & Prop. Model 500) 211330 (Models 500 & 750) 210609
