A.O. Smith 750 & 1000 manual Lb/Lw Natural Gas Train/Blower Assembly- Model, Legend Orifice Table

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 Assembly	191832	22 ....	Orifice, Union (See Orifice Table Below)
*4 ....	Bracket, Blower	191773	23 ....	Plug, 1/8" Pipe	3348
*5 ....	Clamp, Hose	191794	24 ....	Port, Observation Lower	191572
6 ....	Elbow, 1"	1630	25 ....	Port, Observation Upper	191572-1
7 ....	Elbow, Union 1"	2482-1
			26 ....	Screen, Air Inlet	192041
8 ....	Elbow, Street 1"	190763
			27 ....	Screw, Cap 1/4"	190960-2
9 ....	Flange, Observation Port	191573
			28 ....	Srew, Flathead #8-32 x 1/2"	191542
10 ....	Gasket, Blower	191623
			29 ....	Screw, Flathead #8-32 x 3/4"	191542-1
11 ....	Gasket, Burner	191564
			30 ....	Switch, Low Pressure	191149-1
12 ....	Gasket, Manifold	191565
			31 ....	Tee, 1/8"	40119
13 ....	Gasket, Port (1/8" Thick)	191576
			*32 ....	Tee, Union	191633
14 ....	Manifold Assembly	191610
			*33 ....	Tubing, Pressure	191562
15 ....	Nipple, Close 1/8"	191147-1
16 ....	Nipple, Close Stainless	191772	*34 ....	U-Bolt Assembly	191938-1
17 ....	Nipple, Tapped	86397-11	35 ....	Valve, Main Gas	191956
18 ....	Nipple, 1" x 9 1/2"	86397	36 ....	Washer, Lock 1/4"	1006
19 ....	Nipple, 1" x 2"	1177	37 ....	Shutter, Blower	211694
19A ....	Nipple, Pipe 1"x2 1/2"	1179	38 ....	Flange, Shutter	211695
19B ....	Nipple, Pipe 1"x14 1/2"	86397-6	39 ....	Manual Firing Valve	3423-4
*Item Not Illustrated.
					DETAILBACKVIEW

Note: Manual firing valve (item 43) used on

US models made on or after 6/1/02.

LEGEND ORIFICE TABLE

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

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