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
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
HW
*
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
HW
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
HW
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
HW
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
HW
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
HW
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.
HW
HW
HW
HW
A.O. SMITH WATER PRODUCTS CO., INC.
5621 W. 115TH STREET • ALSIP, ILLINOIS 60803
PHONE: 1-800-433-2545 • FAX: 1-800-433-2515
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