A.O. Smith 750 & 1000 Boiler User Manual


 
5
LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY- MODEL 500
Item Description Model 500
Item Description Model 500
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
*Item Not Illustrated.
DETAIL BACK VIEW
Note: Manual firing valve (item 43) used on
US models made on or after 6/1/02.
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
Model Natural Gas Size (In.) Elevation (Ft.)
LB & LW-500 191884-0 0.391 0 - 2000
LB & LW-500 191884-1 0.384 2001 - 3000
LB & LW-500 191884-2 0.374 3001 - 4000
LEGEND ORIFICE TABLE