A.O. Smith 750 & 1000 Replacement Parts List Manual page 2

LB/LW WATERWAYS & COMBUSTION CHAMBER PARTS LIST
Item Description
1 ................ Bracket ........................................................................................ 191602 ........................ 191602 .................... 191602
2 ................ Burner and Cone Assembly ....................................................... 191850 ...................... 191850-1 ................ 191850-2
3 ................ Combustion Chamber Assembly ............................................ 191529-2 .................... 191529-3 ................ 192129-1
4 ................ Connector, Hose ......................................................................... 191765 ........................ 191765 .................... 191765
5 ................ Coupling, Flexible w/Gasket ....................................................... 191780 ........................ 191780 .................. 191780-1
6 ................ Cover, Outer ................................................................................ 210408 ........................ 210408 .................... 210404
7 ................ Gasket, Outer ............................................................................ 211594-1 .................... 211594-1 ................ 211594-1
8 ................ Gasket, Burner .......................................................................... 191564-1 .................... 191564-1 ................ 191564-1
9 ................ Gasket, Inner ............................................................................... 211594 ........................ 211594 .................... 211594
10 ................ Housing Assembly ..................................................................... 211742 ...................... 211742-1 ................ 211742-2
11 ................ Ignitor .......................................................................................... 192334 ........................ 192334 .................... 192334
12 ................ Insulation, Burner ....................................................................... 191618 ........................ 191618 .................... 191618
13 ................ Nut, Manifold ............................................................................... 191555 ........................ 191555 .................. 191555-1
14 ................ O-Ring ......................................................................................... 191556 ........................ 191556 .................. 191556-2
15 ................ Probe, Outlet Temp./ECO ........................................................... 210572 ........................ 210572 .................... 210572
16 ................ Probe, Inlet Temp. ...................................................................... 210571 ........................ 210571 .................... 210571
17 ................ Screw, Machine #8-32, 3/8" Long, SST ..................................... 210444 ........................ 210444 .................... 210444
18 ................ Screw, Machine #8-32, 1" Long SST ......................................... 191770 ........................ 191770 .................... 191770
*19 ................ Sealer, Silicone Hi-Temp ......................................................... 191482-1 .................... 191482-1 ................ 191482-1
20 ................ Sensor, Flame ............................................................................ 210421 ........................ 210421 .................... 210421
21 ................ Spacer Ring ................................................................................ 191554 ........................ 191554 .................. 191554-1
22 ................ Switch, Safety Flow ..................................................................... 211480 ........................ 211480 .................... 211480
23 ................ Tee Assembly ............................................................................. 191583 ........................ 191583 .................... 192387
24 ................ Tube Assembly, Primary (LW Models) ...................................... 210900 ........................ 210900 .................... 192388
24 ................ Tube Assembly, Primary (LB Models) ....................................... 210901 ........................ 210901 .................... 192225
25 ................ Tube Assembly, Outlet ............................................................... 210425 ........................ 210425 .................... 210426
26 ................ Tube Assembly, Secondary ....................................................... 210912 ........................ 210912 .................... 192386
27 ................ Washer, Flat #8 SST ................................................................... 191768 ........................ 191768 .................... 191768
28 ................ Restrictor-Air, Top Cover .......................................................... 191926-1 .................... 191926-1 ................ 191926-1
*Item Not Illustrated.
LW Models
LB Models
Model 500
Note: Replacement housing assemblies (item 10) are currently all steel
type. When replacing the housing assembly both the inner gasket
(item 9) and outer gasket (item 7) must also be replaced. In addition,
high temperature silicone sealant (item 19) is required to fix the gaskets
to the surfaces.
The Tub Replacement Kit is available for replacing housing assemblies.
When ordering use p/n 211742 for LB/LW 500 models, p/n 211742-1 for
LB/LW 750 models and p/n 211742-2 for LB/LW 1000 models.
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Model 750 Model 1000