A.O. Smith LB-1000 Application guide

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A.O. SMITH WATER PRODUCTS CO., INC.
5621 W. 115TH STREET • ALSIP, ILLINOIS 60803
Phone: [phone] • Fax: [phone]
Website: www.hotwater.com
PRINTED IN U.S.A. 0502 211591-000
NATURALGAS
TRAIN/BLOWER
ASSEMBLY
See page 5
PROPANEGASTRAINASSEMBLY
See page 6
WATERWAYS&
COMBUSTION
CHAMBER
See page 2
EXHAUST &DRAIN
ASSEMBLY
See page 3
BY-PASS
See page 6
WIRING/HARNESS&PROBES
See page 8
JACKET/FRAMEASSEMBLY
See page 4
CONTROLBOARD
See page 7
WATERINLET
See page 3
PSD-3-152/a
COMMERCIALPOWERBURNERBOILER
REPLACEMENT PARTS LIST
COPPERBOILERSFORHYDRONIC
HEATING & HOT WATER SUPPLY
LEGENDMODELSLB/LW:1000
SERIES300,301

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Item Description Part Number
1.....Bracket .................................................. 191602
2.....Burner and Cone Assembly ...................191850-2
3.....Combustion ChamberAsembly .............. 211592
4.....Connector,Hose..................................... 191765
5.....Coupling, Flexible w/Gasket ..................191780-1
6.....CoverOuter ............................................ 210404
7.....Gasket, Outer........................................211594-1
8.....Gasket, Burner ......................................191564-1
9.....Gasket, Inner.......................................... 211594
10 ....Housing Assembly ................................211635-2
11.....Ignitor ..................................................... 192334
12 ....Insulation,Burner ................................... 191618
13 ....Nut,Manifold .........................................191555-1
14 ....O-Ring ...................................................191556-2
15 ....Probe,OutletTemp./ECO....................... 210572
LB/LW WATERWAYS & COMBUSTION CHAMBER PARTS LIST
16 ....Probe,InletTemp ................................... 210571
17 ....Screw,#8-32,3/8"Long,SST................. 210444
18 ....Screw, Machine #8-32, 1"Long, SST ..... 191770
19 ....Sealer,Silicone (not shown) ..................191482-1
20 ....Sensor, Flame ........................................ 210421
21 ....SpacerRing ..........................................191554-1
22 ....Switch, Safety Flow................................ 211480
23 ....Tee Assembly......................................... 192387
24 ....Tube Assembly, Primary (LW Models) .... 192388
24 .... Tube Assembly, Primary (LB Models)..... 192225
25 ....Tube Assembly, Outlet ........................... 210426
26 .... Tube Assembly, Secondary .................... 192386
27 ....Washer, Flat #8 SST .............................. 191768
28 ....Restrictor-Air, TopCover ........................191926-1
Item Description Part Number
LW Models
LB Models

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1.... Clamp,Hose (Large) ..............................191794-1
2.... Clamp, Hose(Small) ..............................191794-3
3.... Nut, Hex.................................................191817-1
5.... Drain,Flange........................................... 191620
6.... Drain, FlangeAssembly .......................... 191625
7.... Elbow ...................................................... 191664
9.... Gasket, Drain.......................................... 191622
10 .... Gasket, Vent ..........................................191683-1
11.... Nipple.....................................................20373-18
12 .... Nut, Hex1/4" (Serrated) .......................... 210226
13 .... O-Ring....................................................191556-1
14 .... Plate, DrainSeal ..................................... 191626
15 .... Pump Ass'y, Circulator (LW Models) ....... 211538
Item Description Part NumberItem Description Part Number
16 .... Tube Assembly, Inlet (LW Models) .......... 192308
17 .... Tube Assembly, Primary (LB Models) ..... 192225
18 .... Tube Assembly, Primary (LW Models)..... 192388
19.... Tubing,Condensate ................................ 191746
20.... Tubing, Pressure ..................................... 191562
21.... U-Bolt Assembly ..................................... 191938
22.... ValveDrain ............................................... 26273
23.... Vent Assembly........................................ 210494
24.... VentFlange............................................191685-5
25 .... Washer, Plain.........................................76820-18
26 .... Vent Support, Bracket ............................. 192194
27 .... Vent, Restricting Ring (Series 301, LP) ..191923-1
LB/LW EXHAUST, DRAIN & WATER INLET ASSEMBLY PARTS LIST

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Item Description Part No.
1 .... Bolt Machine 5/16” - 18" ......................191358-2
2 .... ControlPanelAssembly ........................ 210601
3 .... Display Board ....................................... 210219
4 .... Frame Assembly .................................210501-1
5 .... Gasket, Display .................................... 210130
6 .... Grommet ............................................... 97951
7 .... Handle .................................................. 191802
8 .... Junction Box Assembly ........................190438-1
9 .... JunctionBoxCover .................................. 2233
10 .... Label,ControlPanel..............................210561-1
11 .... Locknut, Star........................................... 1953
12 .... Locknut#6-32....................................... 210207
13 .... Nipple,Chase......................................... 41994
14 .... Nut, Lock Hex 5/16” - 18" ........................ 97896
15 .... Panel Assembly, Left Side ....................191796-3
16 .... Panel Assembly, Right Side ..................191796-2
17 .... Panel,LowerFront ...............................191805-1
18 .... Panel,Rear(Natural).............................. 192191
18 .... Panel,Rear(Propane)............................ 210020
19 .... Panel,TopCover ..................................191609-1
20 .... Plate,RearCover................................... 210214
21 .... Screw,HexHead5/16” .......................... 210125
22 .... Screw,HexHead#6-32 ........................ 210206
23 .... Switch,BlowerProver ............................ 191666
24 .... Switch, Blocked Flue ............................. 191667
25 .... Switch , Rocker ....................................191665-1
26 .... SupportBracket(PropaneOnly) ............. 210017
27 .... Transformer(100VA) .............................. 210449
28 .... U - Bolt Assembly (Waterway) ............... 191938
29 .... Washer, Flat.......................................... 191359
30 .... Washer, Lock ........................................ 191480
31 .... Switch, Relay ........................................ 211546
Item Description Part No.
LB/LW JACKET/FRAME ASSEMBLY

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LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY
Item Description Part No.
1 .... Blower .................................................. 192195
2 .... Blower AdapterAssembly....................192215-1
3 .... BlowerManifold Assembly .................... 192217
4 .... Bracket, Blower .................................... 210214
5 .... Clamp,Hose........................................191794-3
6 .... Elbow, 1-1/4"......................................... 192216
7 .... Elbow, Union1-1/4"...............................86506-1
8 .... Flange,Observation Port....................... 191573
9 .... Gasket, Blower Air Inlet ........................ 192213
10 .... Gasket,Burner ..................................... 191564
11 .... Gasket,Manifold................................... 191565
12 .... Gasket, Port (1/8" Thick) ...................... 191576
13 .... Nut, Hex 1/4", Serrated......................... 210226
14 .... Manifold Assembly - Air/Gas ................ 192309
15 .... Nipple,Close 1/8" ................................191147-3
16 .... Nipple, Close Stainless........................191772-1
17 .... Nipple,Tapped ......................................86505-3
18 .... Nipple, 1-1/4" x 38 1/2" ........................86505-28
19 .... Nipple, 1-1/4" x 28 3/4" ........................86505-27
20 .... Nipple, 1-1/4" x 2".................................. 86505
21 .... Nipple, 1-1/4" x 3".................................86505-2
22 .... Nipple, 1-1/4" x 4".................................86505-6
23 .... Nut, Hex 1/4” .......................................191817-1
24 .... Orifice, Air (Series 300 - Nat. Gas).......192737-3
.... Orifice, Air (Series 3011 - L.P. Gas)......192737-2
25 .... Orifice,Union ................. See Orifice Table Below
26 .... Plug, 1/8" Pipe........................................ 3348
27 .... Port,ObservationLower ........................ 191572
28 .... Port,ObservationUpper .......................191572-1
29 .... Screen,Air Inlet ...................................192220-1
30 .... Screw, Cap1/4" ...................................190960-2
31 .... Screw, Flathead#8-32 x 1/2" ................ 191542
32 .... Screw, Flathead#8-32 x 3/4" ...............191542-1
33 .... Switch, Low Gas Pressure...................191149-1
34 .... Shutter,Blower ..................................... 192593
35 .... Shutter Flange ...................................... 192592
36 .... Tee, 1/8" ................................................ 40119
37 .... Tee, Pressure ....................................... 191633
38 .... Tubing,Pressure................................... 191562
40 .... U-BoltAssembly(Gas Train) ...............191938-3
41 .... Valve,Main Gas....................................78481-3
42 .... Valve,Firing .......................................... 3423-3
43 .... Valve, SolenoidGas.............................. 192189
44 .... Washer, Plain ......................................76820-18
Item Description Part No.
DETAILBACKVIEW
LEGENDORIFICE TABLE
Natural Propane Size Elevation
Gas Gas (inches) (Feet)
192222 --- 0.555 0-2000
192222-1 --- 0.537 2001-3000
192222-2 --- 0.533 3001-4000
--- 192739 0.333 0-2000
--- 192739-1 0.329 2001-3000
--- 192739-2 0.325 3001-4000

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Please update these numbers
LB/LW PROPANE GAS TRAIN ASSEMBLY
Item Description Part No.
1 .... Valve, Main Gas, LP 300 Series............. 77780
2 .... Regulator, LP301 Series ...................... 192460
3 .... Valve,Firing .......................................... 3423-3
4 .... Pipe Plug ................................................ 3348
5 .... Switch, Low Gas Pressure...................191149-3
6 .... Nipple,1-1/4” .......................................86505-13
7 .... Nipple,1-1/4” ....................................... 86505-2
8 .... Nipple,1-1/4” ...................................... 86505-17
9 .... Elbow, Union1-1/4” ................................ 86506
Item Description Part No.
10 .... Elbow, 90 Street1-1/4”.......................... 94516
11 .... Elbow, 901-1/4” .................................... 192216
12 .... Nipple,1-1/4”w/Tapping ..................... 86505-32
13 .... Nipple, 1-1/4” ........................................86505-6
14 .... Nipple, 1-1/4” ...................................... 86505-4
15 .... Tee,1/8”NPT Branch............................ 192465
16 .... Connector, Angle1/8” ............................ 1578
17 .... Bleeder,Tube........................................ 210016
18 .... Bleeder,Tube........................................ 192461
1 ...... Ball Valve ............................................................... 191935
2 ...... Tank/Pump Kit (LW Models Only - Not Shown) ...... 210625
3 ...... HexReducing Bushing(LB Only).......................... 91940-8
4 ...... Flush Bushing (LB Only) .......................................192163-2
5 ...... ReliefValve(LWModel) ........................................ 98883-3
...... ReliefValve(LB Model) .........................................210451-2
6 ...... Strap, Cable(not shown)....................................... 99592-2
7 ...... Tee,Condensate ...................................................192040-1
8 ...... Tee(Forusew/reliefvalve):
.............LW Model ....................................................... 78685-4
.............LB Model......................................................... 191584
9 ...... Tee 2"x2"x2" .......................................................... 191584
10 ...... Tee 2"x2"x3/4" ...................................................... 78685-4
11 ...... Valve,Drain............................................................. 26273
12 ...... Valve,ManualShutoff............................................. 3423-3
13 ...... Vent Patch Assembly ............................................ 192161
14 ...... Nipple(For use w/reliefvalve)
.............LW Model .......................................................20373-12
.............LB Model........................................................ 92706-4
15 ...... Clamp,Hose.........................................................191794-1
Item Description Part No.
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.
LB/LW BY-PASS PARTS LIST

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LB/LW 1000 WIRING CHART
COLOR GAUGE PARTNUMBER***
White 14 41974
Black 14 99650
Green 14 41972
White 16 86580
Black 16 86578
Green 16 69058
White 18 170595
Black 18 170596
Green 18 170606
Blue 18 191719
Red 18 170603
Yellow 18 170604
Brown 18 170890
White/Red 18 191700
White/Yellow 18 191702
White/Black 18 191699
Black/White 18 191694
Yellow/Blue 18 191708
Red/Green 18 191717
*** Use dash number to indicate length of wire.
Example: 20 inch long red wire would be expressed as 170603-20.
LB/LW CONTROL BOARD WHC 1502
Part Number 210128
WHC1502

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Outlet Temperature
Control/ ECO Assembly
210572
Tank Probe (LW Models)
211541-1
Inlet Temperature
Control Assembly
210571
WIRING AND HARNESS ASSEMBLY
78468 99593-6 78469 191673 42573 210091 210152 99599-2
22-16 Ga. 16-14 Ga. 22-18 Ga. #10 Stud 22-18 Ga.
Tank Probe
Harness Assembly
210604
Pressure Flow Switch
Harness Assembly
210576
Power
Harness Assembly
210579-1
Gas Valve
Harness Assembly
210574-1 (Propane) Transformer
Harness Assembly
210578
Blower
Harness Assembly
210609
Ignition
Harness Assembly
210575