A O Smith 750 1000 User Manual

PSD-3-153

COMMERCIAL POWER BURNER BOILER

REPLACEMENT PARTS LIST

COPPERBOILERSFORHYDRONIC

HEATING & HOT WATER SUPPLY

LEGEND MODELS LB/LW: 500, 750 & 1000

SERIES: 300 - 301

WIRING/HARNESS&PROBES

See page 12

PROPANEGASTRAINASSEMBLY

See pages 8-10

NATURALGAS

TRAIN/BLOWER

ASSEMBLY

See pages 5-7

JACKET/FRAMEASSEMBLY

See page 4

WATERWAYS&

COMBUSTION

CHAMBER

See page 2

CONTROLBOARD

See page 11

BY-PASS

See pages 8-10

EXHAUST &DRAIN

ASSEMBLY

See page 3

WATERINLET

See page 3

A.O. SMITH WATER PRODUCTS CO., INC.

5621 W. 115TH STREET • ALSIP, ILLINOIS 60803

Phone: 1-800-433-2545 • Fax: 1-800-433-2515

Website: www.hotwater.com

PRINTED IN U.S.A. 0403

211691-000

LB/LW EXHAUST, DRAIN & WATER INLET ASSEMBLY PARTS LIST

Item

Description

Model 500

Model 750

Model 1000

1 ................ Clamp, Hose (Large)......................................................................... 191794-1 ..............191794-1 ............ 191794-1

2 ................ Clamp, Hose (Small)......................................................................... 191794-3 ..............191794-3 ............ 191794-3

3 ................ Nut, Hex .............................................................................................. 191817-1 ..............191817-1 ............ 191817-1

5 ................ Drain, Flange ....................................................................................... 191620 ................. 191620 ................ 191620

6 ................ Drain, Flange Assembly ...................................................................... 191625 ................. 191625 ................ 191625

7 ................ Elbow .................................................................................................... 191664 ................. 191664 ................ 191664

9 ................ Gasket, Drain ....................................................................................... 191622 ................. 191622 ................ 191622

10 ............... Gasket, Vent ......................................................................................... 191683 ................. 191683 .............. 191683-1

11 ............... Nipple ................................................................................................. 20373-15 ..............20373-15 ............ 20373-18

12 ............... Nut, Hex 1/4" (Serrated) ....................................................................... 210226 ................. 210226 ................ 210226

13 ............... O-Ring ................................................................................................ 191556-1 ..............191556-1 ............ 191556-1

14 ............... Plate, Drain Seal .................................................................................. 191626 ................. 191626 ................ 191626

15 ............... Pump Assembly, Circulator (LW Models) ........................................... 211611 ................. 211612 ................ 211538

16 ............... Tube Assembly, Inlet (LW Models) ................................................... 210897-1 ..............210897-2 .............. 192308

17 ............... Tube Assembly, Primary (LB Models) ................................................ 210901 ................. 210901 ................ 192225

18 ............... Tube Assembly, Primary (LW Models)................................................ 210900 ................. 210900 ................ 192388

19 ............... Tubing, Condensate ......................................................................... 191746-24 ........... 191746-24 .......... 191746-24

20 ............... Tubing, Pressure .............................................................................. 191562-26 ........... 191562-26 .......... 191562-26

21 ............... U-Bolt Assembly .................................................................................. 191938 ................. 191938 ................ 191938

22 ............... Valve Drain ............................................................................................ 26273 ................... 26273 .................. 26273

23 ............... Vent Assembly ..................................................................................... 210499 ................. 210499 ................ 210494

24 ............... Vent Flange ........................................................................................ 191685-4 ..............191685-4 ............ 191685-5

25 ............... Washer, Plain..................................................................................... 76820-18 ..............76820-18 ............ 76820-18

26 ............... Vent Support, Bracket (1000 Model Only) ............................................ - - - - - .................... - - - - -.................. 192194

27 ............... Vent, Restricting Ring (500 Model Only) ........................................... 191923-2 ................. - - - - -................... - - - - -

28 ............... Vent, Restricting Ring (Series 301 LP)................................................ - - - - - .................... - - - - -................ 191923-1

LB/LW JACKET/FRAME ASSEMBLY

Item

Description

Model 500

Model 750

Model 1000

1 .......... Bolt, Machine 5/16" - 18 ..............................................................191358-1 ................... 191358-1................... 191358-2

2 .......... Control Panel Assembly .............................................................210601-1 ................... 210601-1..................... 210601

3 .......... Display Board ............................................................................... 210219 ....................... 210219 ...................... 210219

4 .......... Frame Assembly .......................................................................... 210495 ..................... 210495-1................... 210501-1

5 .......... Gasket, Dispaly ............................................................................ 210130 ....................... 210130 ...................... 210130

6 .......... Grommet ....................................................................................... 97591 ......................... 97591......................... 97591

7 .......... Handle .......................................................................................... 191802 ....................... 191802 ...................... 191802

8 .......... Junction Box Assembly ...............................................................190438-1 ................... 190438-1................... 190438-1

9 .......... Junction Box Cover ........................................................................ 2233 ........................... 2233........................... 2233

10 ......... Label, Control Panel .................................................................... 210561 ....................... 210561 .................... 210561-1

11 ......... Locknut, Star ................................................................................... 1953 ........................... 1953........................... 1953

12 ......... Locknut #6 -32.............................................................................. 210207 ....................... 210207 ...................... 210207

13 ......... Nipple, Chase ............................................................................... 41994 ......................... 41994......................... 41994

14 ......... Nut, Lock Hex 5/16" - 18 (1000 Model Only) ................................. - - - - -.......................... - - - - - ......................... 97896

15 ......... Panel Assembly, Left Side ..........................................................191796-1 ................... 191796-1................... 191796-3

16 ......... Panel Assembly, Right Side ........................................................ 191796 ....................... 191796 .................... 191796-2

17 ......... Panel, Lower Front ....................................................................... 191805 ....................... 191805 .................... 191805-1

18 ......... Panel, Rear (Natural) ................................................................... 191748 ..................... 191748-1..................... 192191

........... Panel Rear (Propane).................................................................. 191748 ..................... 191748-4..................... 210020

19 ......... Panel, Top Cover .......................................................................... 191609 ....................... 191609 .................... 191609-1

20 ......... Plate, Rear Cover (1000 Model Only) ............................................- - - - -.......................... - - - - - ........................ 210214

21 ......... Screw, Hex Head 5/16" ................................................................ 210125 ....................... 210125 ...................... 210125

22 ......... Screw, Hex Head #6-32 ............................................................... 210206 ....................... 210206 ...................... 210206

23 ......... Switch, Blower Prover .................................................................. 191666 ....................... 191666 ...................... 191666

24 ......... Switch, Blocked Flue .................................................................... 191667 ....................... 191667 ...................... 191667

25 ......... Switch, Rocker.............................................................................. 191665 ..................... 191665-1................... 191665-1

26 ......... Support Bracket (Propane Only) .................................................... - - - - -......................... 210019 ...................... 210017

27 ......... Transformer (75VA)...................................................................... 192528 ....................... 192528 ....................... - - - - -

........... Transformer (100VA) ..................................................................... - - - - -.......................... - - - - - ........................ 210449

28 ......... U-Bolt Assembly (Water way) ...................................................... 191938 ....................... 191938 ...................... 191938

29 ......... Washer, Flat ................................................................................. 191359 ....................... 191359 ...................... 191359

30 ......... Washer, Lock ............................................................................... 191480 ....................... 191480 ...................... 191480

31 ......... Switch, Relay ..................................................................................- - - - -......................... 211546 ...................... 211546

32 ......... Blower Speed Control.................................................................. 191922 ........................ - - - - - ......................... - - - - -

33 ......... Control Bracket Assembly ........................................................... 210902 ..................... 210902-3................... 192167-2

LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY- MODEL 500

Item Description

Model 500

Item Description

Model 500

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

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.

DETAILBACKVIEW

Note: Manual firing valve (item 43) used on

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

LEGENDORIFICETABLE

Model

Natural Gas Size (In.) Elevation(Ft.)

LB & LW-500

191884-0

191884-1

191884-2

0.391

0.384

0.374

0 - 2000

2001 - 3000

3001 - 4000

LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY- MODEL 750

Item Description

Model 750

Item Description

Model 750

1 ..... Blower ............................................................. 211614

2 ..... Blower Adapter Assembly .............................. 191645

3 ..... Blower Manifold Assembly ............................. 191832

*4 ..... Bracket, Blower ............................................... 191773

*5 ..... Clamp, Hose ................................................... 191794

6 ..... Elbow, 1" ........................................................... 1630

7 ..... Face Bushing 1"x1 1/4" ................................... 99376

*9 ..... Flange, Observation Port ................................ 191573

10 ..... Gasket, Blower................................................ 191623

*11 ..... Gasket, Burner ................................................ 191564

12 ..... Gasket, Manifold ............................................. 191565

*13 ..... Gasket, Port (1/8" Thick) ............................... 191576-1

*14 ..... Gasket, Port (1/16" Thick) ............................... 191576

15 ..... Manifold Assembly ......................................... 191610

16 ..... Nipple, Close 1/8"......................................... 191147-1

17 ..... Nipple, Close Stainless ................................. 191772

18 ..... Nipple, 1x4 1/2" with Tap .............................. 86397-14

19 ..... Nipple, 1" x 9 1/2" ............................................. 86397

20 ..... Nipple, 1" x 2" .................................................... 1177

20A ... Nipple, 1"x15 1/2" ......................................... 86397-13

20B... Nipple, 1 1/4" x 2" .......................................... 86505-29

20C .. Nipple, 1"xClose ............................................... 1342

20D .. Nipple, 1"x4" ................................................... 86397-7

21 ....Nut, Hex 1/4" ..................................................... 170272

22 ....Orifice, Air ........................................................ 192737-1

23 ....Orifice, Union (See Orifice Table Below)

24 ....Plug, 1/8" Pipe .................................................... 3348

*25 ....Port, Observation Lower ................................... 191572

*26 ....Port, Observation Upper ................................. 191572-1

27 ....Screen, Air Inlet................................................. 192041

*28 ....Screw, Cap 1/4" .............................................. 190960-2

*29 ....Srew, Flathead #8-32 x 1/2" ............................. 191542

*30 ....Screw, Flathead #8-32 x 3/4" ......................... 191542-1

31 ....Switch, Low Pressure .................................... 191149-1

33 ....Tee, 1/8" ............................................................. 40119

*34 ....Tee, Union ........................................................ 191633

*35 ....Tubing, Pressure .............................................. 191562

*36 ....Tubing, Top Cover Assembly ........................... 191925

*37 ....U-Bolt Assembly ............................................. 191938-1

38 ....Valve, Main Gas ............................................... 78481-3

*39 ....Washer, Lock 1/4" .............................................. 1006

40 ....Valve, Solenoid Gas ......................................... 192189

41 ....Shutter, Blower ................................................. 211694

42 ....Flange, Shutter ................................................. 211695

43 ....Manual Firing Valve .......................................... 3423-4

*Item Not Illustrated.

DETAILBACKVIEW

LEGENDORIFICETABLE

for boilers built on or after 6/01/02.

Model

Natural Gas Size (In.) Elevation(Ft.)

LB & LW-750 191884-11

LB & LW-750 191884-12

LB & LW-750 191884-13

0.464

0.450

0.443

0 - 2000

2001 - 3000

3001 - 4000

LEGENDORIFICETABLE

Model

Natural Gas Size (In.) Elevation(Ft.)

LB & LW-750

191884-3

191884-5

191884-7

0.484

0.469

0.461

0 - 2000

2001 - 3000

3001 - 4000

Note: Manual firing valve (item 43) used on

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

LB/LW NATURAL GAS TRAIN/BLOWER ASSEMBLY - MODEL 1000

Item Description

Model 1000 Item Description

Model 1000

1 .....Blower ............................................................... 192195

2 .....Blower Adapter Assembly .............................. 192215-1

3 .....Blower Manifold Assembly ............................... 192217

4 .....Bracket, Blower ................................................. 210214

5 .....Clamp, Hose .................................................. 191794-3

6 .....Elbow, 1-1/4" ..................................................... 192216

7 .....Elbow, Union 1-1/4" ......................................... 86506-1

8 .....Flanged 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

24 ....Orifice, Air (Series 30211 - L.P. Gas) ............ 192737-2

25 ....Orifice, Union (See Orifice Table Below)

26 ....Plug, 1/8" Pipe .................................................... 3348

27 ....Port, Observation Lower ................................... 191572

28 ....Port, Observation Upper ................................. 191572-1

29 ....Screen, Air Inlet............................................... 192220-1

30 ....Screw, Cap 1/4" .............................................. 190960-2

31 ....Srew, Flathead #8-32 x 1/2" ............................. 191542

32 ....Screw, Flathead #8-32 x 3/4" ......................... 191542-1

33 ....Switch, Low 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-Bolt Assembly (Gas Train) ......................... 191938-3

41 ....Valve, Main Gas ............................................... 78481-3

42 ....Valve, Firing....................................................... 3423-3

43 ....Valve, Solenoid Gas ......................................... 192189

44 ....Washer, Plain ................................................. 76820-18

42 ....Manual, Shut-off Valve ...................................... 211695

*Item Not Illustrated.

DETAILBACKVIEW

LEGEND ORIFICE TABLE

Natural

Gas

Size

(inches)

0.555

Elevation

(Feet)

192222

192222-1

192222-2

0-2000

0.537

2001-3000

3001-4000

0.533

LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 500

Item Description

Model 500

Item Description

Model 500

10 ....Elbow, 90° Street, 1" ............................................... 190763

11 ....Elbow, 90°, 1".......................................................... 1630

12 ....Nipple, 1" ................................................................ 1179

13 ....Nipple, 1" ............................................................ 86397-11

14 ....Nipple, 1/8" ......................................................... 191147-1

15 ....Tee, 1/8" .................................................................40119

16 ....Nipple, Close Stainless .......................................191772

17 ....Orifice, Union .............................. See Orifice Table Below

1 .....Valve, Main Gas .............................................. 191956-1

2 .....Regulator, LP ..................................................... - - - - -

3 .....Valve, Manual Shut-Off ..................................... 3423-4

4 .....Pipe Plug ............................................................ 3348

5 .....Switch, Low Gas Pressure............................. 191149-3

6 .....Nipple, 1" ........................................................... 86397

7 .....Nipple, 1" ......................................................... 85397-6

8 .....Nipple, 1" ............................................................ 1177

9 .....Elbow, Union, 1" ...................................................... 2482-1

LB/LW 500 ORIFICE TABLE

Propane Gas

Size (In.)

Elevation(Ft.)

192741

192741-1

192741-2

0.229

0.226

0.223

0 - 2000

2001 - 3000

3001 - 4000

LB/LW BY-PASS PARTS LIST - MODEL 500

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.

Item Description

Model 500

Please update these numbers

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.

LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 750

Item

Description

Model 750

Item Description

Model 750

12 .......Nipple, 1-1/4" ............................................... 86505-3

13 .......Nipple, 1-1/4" ..............................................86397-11

14 .......Nipple, 1-1/4" ............................................... 86505-4

15 .......Tee, 1/8" ........................................................192465

16 .......Connector, Angle 1/8".....................................1578

17 .......Bleeder, Tube ...............................................210016

18 .......Bleeder, Tube ...............................................192461

19 .......Bushing, 1" x 1-1/4" .......................................99376

20 .......Nipple, Close Stainless ...............................191772

21 .......Orifice, Union .............................. See Orifice Table Below

1 .......Valve, Main Gas .............................................77780

2 .......Regulator, LP ................................................192460

3 .......Valve, Manual Shut-Off ................................. 3423-3

4 .......Pipe Plug ........................................................3348

5 .......Switch, Low Gas Pressure.........................191149-3

6 .......Nipple, 1-1/4" ............................................... 86505-8

7 .......Nipple, 1-1/4 ................................................ 86505-2

8 .......Nipple, 1-1/4" .............................................. 86505-10

9 .......Elbow, Union ,1-1/4" ......................................... 86506

10 .......Elbow, 90° Street , 1-1/4" .................................. 94516

11 .......Elbow, 90°, 1-1/4" .........................................192216

LB/LW 750 ORIFICE TABLE

Propane Gas

192741-3

192741-5

192741-7

Size (In.)

0.286

Elevation(Ft.)

0 - 2000

0.282

2001 - 3000

3001 - 4000

0.278

LB/LW BY-PASS PARTS LIST - MODEL 750

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

Item Description

Model 750

1 .....Ball Valve ..............................................................191935

2 .....Hex Reducing Bushing LW Models

.....(for use w/Relief Valve)........................................ 91940-1

3 .....Relief valve:

..... LB Model .......................................................... 210451-1

..... 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 ........................................... 3423-3

*9 .....Orifice, Gas Assembly (See Orifice Table)

*10 .....Tube, Condensate ............................................ 191746-120

*11 .....Strap, Cable ......................................................... 99592-2

*Item Not Illustrated.

LB/LW PROPANE GAS TRAIN ASSEMBLY - MODEL 1000

Part No.

Item Description

Part No.

1 ...... Valve, Main Gas, LP 300 Series .................. 77780

2 ...... Regulator, LP 301 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, Union 1-1/4” ..................................... 86506

10 ......Elbow, 90 Street 1-1/4”................................. 94516

11 ......Elbow, 90 1-1/4” ......................................... 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, Angle 1/8” ................................... 1578

17 ......Bleeder, Tube.............................................. 210016

18 ......Bleeder, Tube.............................................. 192461

19 ......Nipple, Close Stainless ........................... 191772-1

20 ......Orifice, Union ....................... See Orifice Table Below

LB/LW 1000 ORIFICE TABLE

Propane Gas

Size (In.)

Elevation(Ft.)

192739

192739-1

192739-2

0.333

0.329

0.325

0 - 2000

2001 - 3000

3001 - 4000

LB/LW BY-PASS PARTS LIST - MODEL 1000

Description Part No.

On LB models the circulating pump must be between

the boiler inlet and the bypass (see figure below).

Item

LW models have pump mounted inside the jacket.

Please update these numbers

1 ........ Ball Valve ........................................................................ 191935

*2 ........ Tank/Pump Kit (LW Models) .......................................... 210625

3 ........ Hex Reducing Bushing (LB Model) .............................. 91940-8

4 ........ Flush Bushing (LB Model) ........................................... 192163-2

5 ........ Relief Valve (LW Model) ................................................ 98883-3

........ Relief Valve (LB Model) ................................................ 210451-2

6 ........ Strap, Cable (not shown).............................................. 99592-2

7 ........ Tee, Condensate ......................................................... 192040-1

8 ........ Tee (For use w/relief valve):

............... 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, Manual Shutoff ..................................................... 3423-3

13 ........ Vent Patch Assembly ..................................................... 192161

14 ........ Nipple (For use w/relief valve)

............... LW Model .............................................................. 20373-12

............... LB Model ................................................................ 92706-4

15 ........ Clamp, Hose................................................................ 191794-1

*Item Not Illustrated.

LB/LW CONTROL BOARD WHC 1502

Part Number 210128

LB/LW WIRING CHART

COLOR

White

GAUGE

PART NUMBER ***

41974

Black

99650

Green

41972

White

86580

Black

86578

Green

69058

White

Black

Green

Blue

Red

Yellow

Brown

170595

170596

170606

191719

170603

170604

170890

191700

191702

191699

191694

191708

191717

White/Red

White/Yellow

White/Black

Black/White

Yellow/Blue

Red/Green

*** Use dash number to indicate length of wire.

Example: 20 inch long red wire would be expressed as 170603-20.

LB/LW 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.

Ignition

Harness Assembly

210575

Tank Probe

Harness Assembly

210604

Pressure Flow Switch

Harness Assembly

210576

Power Harness Assembly

210579-1

(-0 0n -500 Models Only)

Transformer

Harness Assembly

210578 (Model 1000)

211330 (Models 500 & 750)

Gas Valve Harness Assembly

210574-1 (Propane)

210574-2 (Nat. & Prop. Model 500)

Blower

Harness Assembly

210609 (Model 1000)

Outlet Temperature

Control/ ECO Assembly

210572

Inlet Temperature

Control Assembly

210571

Tank Probe (LW Models)

211541-1

A.O. SMITH WATER PRODUCTS CO., INC.

5621 W. 115TH STREET • ALSIP, ILLINOIS 60803

Phone: 1-800-433-2545 • Fax: 1-800-433-2515

Website: www.hotwater.com

PSD, Alsip, IL

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