AO Smith Water Heater HW 300 THRU HW 670 User Manual

PSD-3-140/D

COMMERCIAL WATER HEATER

REPLACEMENT PARTS LIST

MODELS HW 300 THRU HW 670:

SERIES 932/933

INTERMITTENT

IGNITION CONTROL

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/parts

PRINTED IN U.S.A. 0601 2277

192358-000 REV.05

ROBERTSHAW

GAS VALVE

COIL HIGH LIMIT

ASSEMBLY

WIRE TERMINALS USED WITH ITEM 62

PILOT BURNER

ASSEMBLY

77951

85688

99593

78469

78468

Item

Parts Description

HW 300

HW 399/420

HW 520

HW670

1.......... Base, Assembly ................................................ 76195-700 ..........76193-700.......... 76193-700 ......... 76193-700

2.......... Box, Junction ...................................................... 190616-4 ............190616-4 ............ 190616-4 ........... 190616-4

3.......... Bracket, Gas Control String ..................................93764 ................. 93764 ................. 93764 ................. 93764

4.......... Bracket, Pilot (At Main Gas Burner) ......................190424 ............... 190424 ............... 190424 ............... 190424

5.......... Bracket, Shield .....................................................190473 ............... 190473 ............... 190473 ............... 190473

6.......... Burner, Main: Sea Level

..........

Natural Gas.................................................... 98593-20 .............98593-2 ............. 98593-21 ............ 98593-4

Propane Gas .................................................. 98593-1 ..............98593-3 ............. 98593-22 ............ 98593-5

7.......... Burner, Pilot (With Orifice):

..........

Natural Gas.................................................... 210871-0 ............210871-0 ............ 210871-0 ........... 210871-0

Propane Gas ................................................. 210871-1 ............210871-1 ............ 210871-1 ........... 210871-1

9.......... Bushing, Snap.......................................................98863 ................. 98863 ................. 98863 ................. 98863

10.......... Cap, Terminal End ................................................98206 ................. 98206 ................. 98206 ................. 98206

11.......... Clamp, Capillary Tube ..........................................94998 ................. 94998 ................. 94998 ................. 94998

12.......... Clamp, Tubing.......................................................68903 ................. 68903 ................. 68903 ................. 68903

13.......... Clip, Retainer ........................................................92979 ................. 92979 ................. 92979 ................. 92979

14.......... Coil, Combustion Chamber..................................97485 ................. 97486 ................. 99267 ................. 99267

15.......... Collector, Flue ................................................... 190285-10 .... 190285-1/190285 ..... 190285-5 ............. 190286

16.......... Control, Intermittent Ignition:

..........

Natural Gas (Series 932) ................................191182 ............... 191182................ 191182 ............... 191182

Propane Gas (Series 933) ............................ 191182-1............. 191182-1 ............ 191182-1 ........... 191182-1

17.......... Control, Limit ....................................................... 93661-4 ..............93661-4 .............. 93661-4 ............. 93661-4

18.......... Control, Limit (Protector Switch) ......................... 77981-2 ..............77981-2 .............. 77981-2 ............. 77981-2

19.......... Cover, Leg ......................................................... 97259-701 ..........97259-701.......... 97259-701 ......... 97259-701

20.......... Cover, Limit Control (Protector Switch) ............. 96667-706 ..........96667-706.......... 96667-706 ......... 96667-706

21.......... Cover, Peep Hole ............................................... 1050-702 ............1050-702 ............ 1050-702 ........... 1050-702

22.......... Cover, Top .......................................................... 96096-709 ..........96096-701.......... 96378-702 ......... 96378-701

23.......... *Decals:

..........

ASHRAE ...........................................................191857 ............... 191857 ............... 191857 ............... 191857

California ..........................................................42985 ................. 42985 ................. 42985 ................. 42985

Clearance — Models HW-300, 399 .............. 190022-1 ............190022-2 ................ - - - - ................... - - - -

Clearance — Models HW-420, 520 & 670 ........ - - - - .................. 76982 ................. 76982 ................. 76982

Flammable Vapors/Scald ................................192872 ............... 192872 ............... 192872 ............... 192872

Lighting & Operating ........................................191367 ............... 191367 ............... 191367 ............... 191367

M.E.A. ............................................................. 42929-22 ............42929-22 ............ 42929-23 ........... 42929-22

Pilot 77860 ......................................................77860 ................. 77860 ................. 77860

Protector ............................................................97315 ................. 97315 ................. 97315 ................. 97315

Warning............................................................190230 ............... 190230 ............... 190230 ............... 190230

Water Inlet .........................................................94518 ................. 94518 ................. 94518 ................. 94518

Water Outlet ......................................................94519 ................. 94519 ................. 94519 ................. 94519

Item

Parts Description

HW 300

HW 399/420

HW 520

HW670

Wiring Diagram:

..........

Natural Gas ...................................192359 .................. 192359 .................. 192359 .............. 192359

Propane Gas.................................192360 .................. 192360 .................. 192360 .............. 192360

24.......... Elbow, Union With 1/8" Pressure Tap ...........1854 ...................... 2482 ..................... 86506 ................ 86506

25.......... Exchanger, Heat ..........................................190922 .................. 190913 .................. 190889 .............. 190889

26.......... Fitting, Limit Control .....................................97570 .................... 97570 .................... 97570 ................ 97570

27.......... Grommet ......................................................96053 .................... 96053 .................... 96053 ................ 96053

28.......... Hood, Draft:

..........

Series 932 ................................ 190479-700 .. 98428-707/98428-704....98428-704........ 192256-700

Series 933 ................................ 190479-700 .. 98428-707/98428-704....98428-704......... 98428-700

30.......... Insulation, Blanket.......................................190175 ................ 190175-1 ............... 190175-2........... 190175-3

31.......... Insulation, Pyrofelt .......................................190176 .................. 190177 .................. 190177 .............. 190177

32.......... Insulator ..................................................... 32779-1 ................ 32779-1 ................. 32779-1 ..............32779-1

33.......... Jacket ...................................................... 211176 .................. 211177 ...................211178............... 211178

34.......... Leg

................................................... 96383-704 ............ 96383-701 .............96383-701......... 96383-701

35.......... Nut, Tie Rod .................................................85138 .................... 85138 .................... 85138 ................ 85138

36.......... Nut, Wing ..................................................... 1995-1................... 1995-1 ................... 1995-1 ................1995-1

37.......... Orifice, Pilot Burner:

..........

Natural Gas ............................................6210 ...................... 6210 ...................... 6210 .................. 6210

Propane Gas ........................................210913 .................. 210913 .................. 210913 .............. 210913

38.......... Plug, Pipe 1/8" Pressure Tap ........................3348 ...................... 3348 ...................... 3348 .................. 3348

39.......... Retainer, Door .............................................190429 .................. 190429 .................. 190429 .............. 190429

40.......... Ring, Support ...............................................95359 .................... 85405 .................... 85405 ................ 85405

41.......... Rod, Tie (3 Required) ................................... - - - - .................. 94453-11 ................ 94453-3 ..............94453-3

.......... Rod, Tie (2 Required) ................................ 94453-6 ................... - - - - ....................... - - - - ....................- - - -

.......... Rod, Tie (1 Required) ................................ 94453-2 ................... - - - - ....................... - - - - ................... - - - -

42.......... Screen, Peep Hole ........................................1051 ...................... 1051 ...................... 1051 .................. 1051

43.......... Screw, Thumb ..............................................97288 .................... 97288 .................... 97288 ................ 97288

44.......... Shield, Base Radiation .............................. 96015-1 .................. 96015 .................... 96015 ................ 96015

45.......... Shield, Door ................................................ 191119 .................. 191119 ...................191119............... 191119

46.......... Shield, Floor ............................................... 96025-1 .................. 96025 .................... 96025 ................ 96025

47.......... Shield, Leg ...................................................97265 .................... 97265 .................... 97265 ................ 97265

48.......... Shield, Pilot .................................................170247 .................. 170247 .................. 170247 .............. 170247

49.......... Skirt Assembly..............................................97260 .................... 97261 .................... 97262 ................ 97262

50.......... Stud, Floor Shield .........................................96384 .................... 96384 .................... 96384 ................ 96384

51.......... Switch, Safety Flow

..........

(Required but not supplied with unit) ..211480 .................. 211480 .................. 211480 .............. 211480

52.......... Tape, Asbestos Free (Used with Item 40) ...95072 .................. 95072-1 ................. 95072-1 ..............95072-1

53.......... Terminal, Segment (4 Required) .................98205 .................... 98205 .................... 98205 ................ 98205

54.......... Thermal Balancer ........................................98190 .................... 98190 .................... 98190 ................ 98190

55.......... Transformer .................................................99238 .................... 99238 .................... 99238 ................ 99238

56.......... Tube, Asbestos Free ....................................68831 .................... 68831 .................... 68831 ................ 68831

57.......... Tube, By-Pass ............................................ 96162-1 ................ 94451-3 .................. 97463 ................ 97463

58.......... Tubing, 1/4" x 60" Wire Assorted Fittings

..........

(User to cut to required length) ........... 1417-60 ................ 1417-60 ................. 1417-60 ..............1417-60

59.......... Valve, Gas Control:

..........

Natural Gas (Series 932)......................78450 .............78450-4/78450 ............ 78450 ................ 78450

Propane Gas (Series 933) ................. 78450-1 ......... 78450-5/78450-1 .......... 78450-1 ..............78450-1

60.......... Valve, Relief 50 PSI .....................................210451 ................ 210451-1 ............... 210451-1........... 210451-1

61.......... Wire, 200°C Tan with Terminals ...................6226 ...................... 6226 ...................... 6226 .................. 6226

62.......... *Wire, (See illustration for terminals —

.......... Order as required):

..........

16 AWG Stranded, 1050C, AWM & TEW

Black ..............................................86578 .................... 86578 .................... 86578 ................ 86578

Red.................................................86579 .................... 86579 .................... 86579 ................ 86579

White ..............................................86580 .................... 86580 .................... 86580 ................ 86580

18 AWG Stranded, 200°C

Tan .................................................78223 .................... 78223 .................... 78223 ................ 78223

63.......... Wire, Ground, 250°C ................................ 170889-69 ............ 170889-69 .............170889-69......... 170889-69

64.......... Standard hardware items to be purchased locally.

65.......... Glass Yarn (4 Req’d.) ................................. 68831-2 ................ 68831-3 ................. 68831-3 ..............68831-3

66.......... Glass Yarn (4 Req’d.) ................................. 68831-5 ................ 68831-4 ................. 68831-6 ..............68831-6

*Items not illustrated.

When ordering wire, indicate length required in inches. (Example: 86578-100 equals 100" length).

Part numbers underlined are recommended stock items for emergency replacement. (Consider gas used in your area only).

Request parts from PSD by giving all information such as model and series number, type of gas and specifications.

Parts List PSD-3-140/C supersedes Parts List PSD-3-140/A&B.

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 • Email: [email protected]

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