A.O. Smith LB/LW 700 manual LB/LW Propane GAS Train Assembly Model, LB/LW BY-PASS Parts List Model

LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 500

Item	Description	Model 500	Item	Description	Model 500
1	Valve, Main Gas	191956-1	10 ....	Elbow, 90° Street, 1"	190763
2	Regulator, LP	- - - - -	11 ....	Elbow, 90°, 1"	1630
3	Valve, Manual Shut-Off	3423-4	12 ....	Nipple, 1"	1179
4	Pipe Plug	3348	13 ....	Nipple, 1"	86397-11
5	Switch, Low Gas Pressure	191149-3	14 ....	Nipple, 1/8"	191147-1
6	Nipple, 1"	86397	15 ....	Tee, 1/8"	40119
7	Nipple, 1"	85397-6	16 ....	Nipple, Close Stainless	191772
8	Nipple, 1"	1177	17 ....	Orifice, Union	See Orifice Table Below
9	Elbow, Union, 1"	2482-1

LB/LW 500 ORIFICE TABLE

Propane Gas	Size (In.)	Elevation (Ft.)
192741	0.229	0 - 2000
192741-1	0.226	2001 - 3000
192741-2	0.223	3001 - 4000

On LB models the circulating pump must be between the boiler inlet and the bypass (see figure below). LW models have pump mounted inside the jacket.

Please update these numbers

LB/LW BY-PASS PARTS LIST - MODEL 500

Item	Description	Model 500
1	Ball Valve	191935
2	Hex Reducing Bushing LW Models
.....	(for use w/Relief Valve)	91940-1
3	Relief valve:
.....	LB Model	210451
.....	LW Model	98883-3
4	Tee, 2" x 2" x 1"	78685-2
5	Tee, 2"	191584
6	Tee, 2" x 2" x 2"	78685-4
7	Valve, Drain	26273
*8	Valve, Manual Shutoff	- - - - -
*9	Orifice, Gas Assembly (See Orifice Table)
*10	Tube, Condensate	191746-120
*11	Strap, Cable	99592-2

*Item Not Illustrated.

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