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A.O. Smith 750 & 1000 Replacement Parts List Manual page 5

Commercial power burner boiler series: 300 - 301

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Item Description
1 .... Blower ............................................................ 211613
2 .... Blower Adapter Assembly ............................. 191645
3 .... Blower Manifold Assembly ............................ 191832
*4 .... Bracket, Blower .............................................. 191773
*5 .... Clamp, Hose ................................................. 191794
6 .... Elbow, 1" ............................................................. 1630
7 .... Elbow, Union 1" .............................................. 2482-1
8 .... Elbow, Street 1" .............................................. 190763
9 .... Flange, Observation Port ............................... 191573
10 .... Gasket, Blower .............................................. 191623
11 .... Gasket, Burner ............................................... 191564
12 .... Gasket, Manifold ............................................ 191565
13 .... Gasket, Port (1/8" Thick) ................................ 191576
14 .... Manifold Assembly ........................................ 191610
15 .... Nipple, Close 1/8" ...................................... 191147-1
16 .... Nipple, Close Stainless ................................ 191772
17 .... Nipple, Tapped ........................................... 86397-11
18 .... Nipple, 1" x 9 1/2" ............................................. 86397
19 .... Nipple, 1" x 2" ......................................................1177
19A .... Nipple, Pipe 1"x2 1/2" ......................................... 1179
19B .... Nipple, Pipe 1"x14 1/2" ................................. 86397-6
*Item Not Illustrated.
Note: Manual firing valve (item 43) used on
US models made on or after 6/1/02.
LEGEND ORIFICE TABLE
Model
Natural Gas
LB & LW-500
191884-0
LB & LW-500
191884-1
LB & LW-500
191884-2
LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY- MODEL 500
Model 500
Size (In.)
Elevation (Ft.)
0.391
0 - 2000
0.384
2001 - 3000
0.374
3001 - 4000
Item Description
20 .... Nut, Hex 1/4" ..................................................... 170272
21 .... Orifice, Air .......................................................... 192737
22 .... Orifice, Union (See Orifice Table Below)
23 .... Plug, 1/8" Pipe .................................................... 3348
24 .... Port, Observation Lower ................................... 191572
25 .... Port, Observation Upper ................................. 191572-1
26 .... Screen, Air Inlet ................................................. 192041
27 .... Screw, Cap 1/4" .............................................. 190960-2
28 .... Srew, Flathead #8-32 x 1/2" ............................. 191542
29 .... Screw, Flathead #8-32 x 3/4" ......................... 191542-1
30 .... Switch, Low Pressure .................................... 191149-1
31 .... Tee, 1/8" ............................................................. 40119
*32 .... Tee, Union ........................................................ 191633
*33 .... Tubing, Pressure .............................................. 191562
*34 .... U-Bolt Assembly ............................................. 191938-1
35 .... Valve, Main Gas ................................................ 191956
36 .... Washer, Lock 1/4" .............................................. 1006
37 .... Shutter, Blower ................................................. 211694
38 .... Flange, Shutter ................................................. 211695
39 .... Manual Firing Valve .......................................... 3423-4
5
Model 500
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