A. O. Smith BTR-120 Parts List
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TER HEATER HEA
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TER HEA
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ULLETINULLETIN
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ULLETIN
BB
PSD - Alsip, Illinois
Date: December 20, 1999 No. 137 Rev. 2
Subject: Gas Water Heater Conversion Policy
To: All Accounts
* This supersede all previous letters and field bulletins concerning residential and commercial water heater conversion.
ULLETINULLETIN
TERTER
TER
TERTER
GAS WATER HEATER CONVERSION POLICY
All A.O. Smith Water Products Company’s residential and commercial gas water heaters are designed certified by CSA or UL,
under ANSI Standards for operation on one type of gas only, as indicated on the water heater’s model number and rating
plate.
A.O. Smith realizes that there may be certain situations where a field conversion may be necessary and in order to facilitate
such a conversion, A. O. Smith complies with CSA or UL regulations ensuring that a field conversion be appropriately and
safely completed.
An improper field conversion from one type of gas to another could cause potentially dangerous conditions that may cause an
explosion or fire resulting in property damage, bodily injury or both.
A.O. SMITH WILL ONLY ALLOW THE CONVERSION OF GAS WATER HEATERS FROM LP GAS (PROPANE) TO
NATURAL GAS. THE CONVERSION OF A GAS WATER HEATER FROM NATURAL GAS TO LP GAS (PROPANE) IS
NOT ALLOWED UNDER ANY CIRCUMSTANCES.
A.O. Smith will provide kits as demand warrants through our Parts Department, phone no.
1-800-433-2545. Prices, dimensions and specifications are subject to change without notice.
Each conversion kit is to be installed by an A.O. Smith service agent or a gas utility serviceman in accordance with
A.O. Smith’s written instructions and all codes and requirements of the authority having jurisdiction. Failure to follow
instructions could result in serious injury or property damage. The utility performing this work assumes responsibility for
this conversion.
Changing the Input on Gas Water Heaters
The only changes to the input of a gas water heater allowed are:
• Adjustments to match that shown on the rating plate of the heater. The installation instructions supplied with the
heater indicate if adjustments to input are a required procedure.
• Changes made as required to adjust the heater for proper operation at high altitude as determined by a qualified
service technician. Service manuals include the proper procedure for adjusting heaters at high altitudes.
Conversion of Gas Water Heaters
The conversion of LP gas (Propane) to Natural gas is ONLY allowed providing:
• The conversion is done as part of a gas utility’s program where propane appliances were installed anticipating the
completion of natural gas service to the area. The conversion must be done under the direct supervision of the
utility and by their service representatives.
Claims of damage or injury arising from the unauthorized conversion of any A.O. Smith water heater not design certified for
conversion will be the complete and total responsibility of the person or entity making the conversion.
If you have any questions regarding the above policy, please contact the A.O. Smith Parts Department at 1-800-433-2545 or
our Technical Information Center at 1-800-527-1953.
A.O. SMITH WATER PRODUCTS CO., INC.
5621 W. 115TH STREET • ALSIP, ILLINOIS 60803
FAX: 1-800-433-2515 • www.hotwater.com
Printed in the U.S.A. 2574 04/00 No. 137 Rev. 2
PHONE: 1-800-433-2545
PSD-3-427/a
COMMERCIAL TANK TYPE WATER HEATER
REPLACEMENT PARTS LIST
MODELS BTR(C) 120 THRU 500A:
STANDARD AND ASME (A)
SERIES 104/105/106/107
EFFIKAL DAMPER DRIVE ASSEMBLY
22b
22c
GAS V ALVES
HONEYWELL VALVE BTR(C) 500A
51
52
WHITE RODGERS VALVE BTR(C) 120 - 400A
51
52
A.O. SMITH WATER PRODUCTS COMPANY
5621 W. 115TH STREET • ALSIP, ILLINOIS 60803
PHONE: 1-800-433-2545 • FAX: 1-800-433-2515
Website: www.aosmithwaterheaters.com
PRINTED IN U.S.A. 0803 195813-000
- 1 -
CLEANOUT ASSEMBLY
WIRE TERMINALS
46
HONEYWELL CONTROL IGNITION MODULE
17
78468 99593(.250 X .032) 78469 (.250 X .032)
192834 (.187 X .032)
18
5
4
6
7
57
55
58
17
56
5
4
47
54
3
43
44
41
60
- 2 -
ITEM PARTS DESCRIPTION BTR 120 BTR 154 BTR 180 BTR 197 BTR 198
1 ............ Flue Baffle .................................... 193595 .............. 192199-3.............193795-1 ............ 193696 ................193696
2 ............ Jacket Base ................................. 193862 ..............193862.................193819 ................ 193819 ................ 193819
3 ............ Main Burner Orifice Bracket ......... 98044(3)............ 98044(3) ..............98044(5) ............. 98044(5)..............98044(5)
4 ............ Main Burner .................................. 98047................. 98047...................98047 .................. 98047 ................... 98047
5 ............ Main Burner w/Pilot Bracket......... 193873-1........... 193873-1 .............193873-1 ............ 193873-1 .............193873-1
6 ............ Pilot Burner, Natural .................... 193314-4 ........... 193314-4 .............193314-4 ............ 193314-4 .............193314-4
7 ............ Pilot Burner, LP ............................ 193314-3 ........... 193314-3 .............193314-3 ............ 193314-3.............193314-3
8 ............ Floor Shield Assembly ................ 193864 .............. 193864.................193824 ................ 193824 ................193824
9 ............
CLEANOUT ASSEMBLY
11 ..... Gasket ..........................................99038................. 99038 ...................99038 .................. 99038................... 99038
12 ..... Pressure Plate ............................. 99037................. 99037...................99037 .................. 99037 ................... 99037
13 ..... Screws, Self Tapping .................. 69852 ................. 69852...................69852 .................. 69852 ................... 69852
17 .......... Control, Ignition Module............... 193325 ..............193325.................193325 ................ 193325 ................ 193325
18 .......... Control, Dual w/ECO ................... 192828 .............. 192828.................192828 ................ 192828 ................192828
19 .......... Cover, Cleanout ........................... 181260 .............. 181260.................181260 ................ 181260 ................181260
20 .......... Cover, Inner .................................. 193393-1 ........... 193393-2 .............193608 ................ 193608 ................193608
21 .......... Jacket Cover.................................
22a........ Drafthood ..................................... 193596 ..............193596-1 .............191790 ................ 191790 ................191790
22b........ Damper Drive Assembly ............. 194484 .............. 194484.................194484 ................ 194484 ................194484
22c ........ Harness Adapter.......................... 194459 ..............194459.................194459 ................ 194459 ................194459
23 .......... Top Insulation .............................. 41560-56 ........... 41560-56 .............192867 ................ 192867 ................192867
LABELS
24 ..... L&O Label .................................... 193620 .............. 193620.................193620 ................ 193620 ................193620
26 ..... Cleanout....................................... 193914 .............. 193914.................193914 ................ 193914 ................193914
27 ..... *Bilingual Instruction ................... 193912 .............. 193912.................193912 ................ 193912 ................193912
28 ..... *Ultra Coat .................................... 193860
29 ..... *ECO Instruction .......................... 193911 ..............193911.................193911 ................ 193911 ................193911
30 ..... *Flammable Vapors .................... 192872 ..............192872.................192872 ................ 192872 ................192872
31 ..... *Help Line .................................... 190600 .............. 190600.................190600 ................ 190600 ................190600
32 ..... *Instruction ................................... 170345 ..............170345.................170345 ................ 170345 ................170345
33 ..... *Master Fit .................................... 193859 .............. 193859.................193859 ................ 193859 ................193859
34 ..... *Pilot .............................................193915 ..............193915.................193915 ................ 193915 ................193915
35 ..... *Propane ...................................... 182572 ..............182572.................182572 ................ 182572 ................182572
36 ..... *Relief Valve ................................. 200042 ..............
37 ..... *Water Inlet................................... 161040 ..............161040.................161040 ................ 161040 ................161040
38 ..... *Water Outlet ................................ 161040-1........... 161040-1 .............161040-1 ............ 161040-1 .............161040-1
39 ..... *Wiring Diagram .......................... 193621 .............. 193621.................193621 ................ 193621 ................ 193621
40 .......... Leg................................................ 193826 .............. 193826.................193826 ................ 193826 ................193826
41 .......... Manifold ........................................ 76244................. 76244...................76244-2 ............... 76244-2 ...............76244-2
42 .......... *Instruction Manual ...................... 195779 .............. 195779.................195779 ................ 195779 ................195779
43 .......... Main Burner Orifice, Natural… .... 76243-32 ........... 76243-30 .............76243-35 ............ 76243-32 ............. 76243-32
44 .......... Main Burner Orifice, LP ................ 76243-49 ........... 76243-46 .............76243-51
45 .......... Anode Rod ................................... 43817-38 ........... 43817-38 .............43817-38 ............ 43817-42 .............43817-42
46 .......... T&P Relief Valve........................... 99465-7............. 99465-7 ...............99465-7............... 99465-7...............99465-7
47 .......... Transformer ................................. 193444 ..............193444.................193444 ................ 193444 ................193444
48 .......... *Pilot Tubing ................................. 1417-60 ............. 1417-60 ...............1417-60 ............... 1417-60 ...............1417-60
49 .......... Inlet Tube ..................................... 193729 .............. 192626.................193729 ................ 192626 ................192626
50 .......... Drain Valve ................................... 26273-6 ............. 26273-6 ...............26273-6 ............... 26273-6 ...............26273-6
51 .......... Gas Valve Natural ........................ 192827 .............. 192827.................192827 ................ 192827 ................192827
52 .......... Gas Valve LP ................................ 192827-1 ........... 192827-1 .............192827-1 ............ 192827-1 .............
53 .......... Wire Conduit ................................ 193456-1 ........... 193456-1 .............193456-1 ............ 193456-1 .............193456-1
54 .......... Ground Wire ................................. 77948-7............. 77948-7 ...............77948-7............... 77948-7 ...............77948-7
55 .......... Switch Panel/Mounting Plate ....... 193448 ..............193448.................193448 ................ 193448 ................193448
56 .......... Off/On Switch ................................ 193243 ..............193243.................193243 ................ 193243 ................193243
57 .......... Bushing........................................ 193404 ..............193404.................193404 ................ 193404 ................193404
58 .......... Jumper Wire ................................. 193476 ..............193476.................193476 ................ 193476 ................ 193476
59 .......... Control Box Panel ........................ 193447 .............. 193447.................193447 ................ 193447 ................193447
60 .......... Cover - Burner .............................. 98185 ................. 98185...................98185-2 ............... 98185-2 ...............98185-2
61 .......... The Eliminator ..............................
62 .......... Galvanized Pipe Union, 1 1/2” ..... 195127 ..............195127.................195127 ................ 195127 ................195127
Collar ............................................ 74060................. 74060...................74060 .................. 74060...................74060
BTR
97062-6............. 97062-6 ...............97062-7............... 97062-7...............97062-7
BTR
.............. 193860.................193860 ................ 193860 ................193860
200042.................200042 ................ 200042 ................200042
BTR
............ 76243-49.............76243-49
192827-1
BTR
195100 ..............195100.................195098 ................ 195098 ................ 195098
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ITEM PARTS DESCRIPTION BTR 199 BTR 200/A BTR 250/A BTR 251/A BTR 275/A
1 ...........Flue Baffle .................................... 193795-1.............. 193889................ 193595 .................193595.................193945
2 ...........Jacket Base ................................. 193819 .................192095................ 192095 ................. 193919.................192095
3 ...........Main Burner Orifice Bracket......... 98044(5)............... 98044(5) ............. 098044(5) ............ 098044(7) ............098044(5)
4 ...........Main Burner.................................. 98047 ...................98047.................. 98047 ................... 98047...................98047
5 ...........Main Burner w/Pilot Bracket ........ 193873-1.............. 193873-1 ............ 193873-1.............. 193873-1 .............193873-1
6 ...........Pilot Burner, Natural .................... 193314-4..............193314-4 ............ 193314-4.............. 193314-4 .............193314-4
7 ...........Pilot Burner, LP ............................ 193314-3 .............. 193314-3 ............ 193314-3.............. 193314-3 .............193314-3
8 ...........Floor Shield Assembly ................ 193824 ................. 170259-3 ............ 193943 .................193864-1 .............193943
9 ...........
CLEANOUT ASSEMBLY
11 ....Gasket .......................................... 99038 ...................99038 .................. 99038 ................... 99038...................99038
12 ....Pressure Plate ............................. 99037 ................... 99037 .................. 99037 ................... 99037 ...................99037
13 ....Screws, Self Tapping .................. 69852 ...................69852.................. 69852 ................... 69852...................69852
17 .........Control, Ignition Module .............. 193325 ................. 193325................ 193325 ................. 193325.................193325
18 .........Control, Dual w/ECO ................... 192828 ................. 192828 ................ 192828 ................. 192828.................192828
19 .........Cover, Cleanout ........................... 181260 ................. 181260 ................ 181260 ................. 181260.................181260
20 .........Cover, Inner.................................. 193608 ................. 193392................ 193392 .................193391.................193392
21 .........Jacket Cover ................................ 97062-7................ 170256 ................ 170256 ................. 97062...................170256
22a.......Drafthood ..................................... 191790 .................191790 ................ 193891 ................. 193891.................193891
22b.......Damper Drive Assembly ............. 194484 ................. 194484 ................ 194484 ................. 194484.................194484
22c .......Harness Adapter ......................... 194459 ................. 194459 ................ 194459 ................. 194459.................194459
23 .........Top Insulation .............................. 192867 ................. 192867................ 192867 .................41560-56 .............192867
LABELS
24 ....L&O Label .................................... 193620 .................193620................ 193620 ................. 193620.................193620
26 ....Cleanout ...................................... 193914 .................193914................ 193914 ................. 193914.................193914
27 ....*Bilingual Instruction ................... 193912 ................. 193912 ................ 193912 ................. 193912.................193912
28 ....*Ultra Coat ...................................
29 ....*ECO Instruction .......................... 193911 .................193911................ 193911 ................. 193911.................193911
30 ....*Flammable Vapors .................... 192872 .................193911................ 192872................. 192872.................192872
31 ....*Help Line .................................... 190600 .................190600................ 190600 ................. 190600.................190600
32 ....*Instruction................................... 170345 .................170345................ 170345 ................. 170345.................170345
33 ....*Master Fit .................................... 193859 .................193859................ 193859 ................. 193859.................193859
34 ....*Pilot ............................................. 193915 ................. 193915 ................ 193915 ................. 193915.................193915
35 ....*Propane...................................... 182572 .................182572................ 182572 ................. 182572.................182572
36 ....*Relief Valve................................. 200042
37 ....*Water Inlet .................................. 161040 ................. 161040................ 161040 ................. 161040.................161040
38 ....*Water Outlet................................ 161040-1..............161040-1 ............ 161040-1.............. 161040-1 .............161040-1
39 ....*Wiring Diagram .......................... 193621 ................. 193621................ 193621 .................193621.................193621
40 .........Leg ............................................... 193826 .................193826................ 193826................. 193826.................193826
41 .........Manifold........................................ 76244-2 ................ 76244-2 .............. 76244-2................ 76244-3 ...............76244-2
42 .........*Instruction Manual ...................... 195779 ................. 195779 ................ 195779 ................. 195779.................195779
43 .........Main Burner Orifice, Natural........ 76243-32.............. 76243-32 ............ 76243-30.............. 76243-33 .............76243-29
44 .........Main Burner Orifice, LP................ 76243-49 .............. 76243-48 ............
45 .........Anode Rod ................................... 43817-38..............180618-42 .......... 180618-42 ...........43817-38 .............180618-42
46 .........T&P Relief Valve .......................... 99465-7................ 99465-7 .............. 192467 ................. 192467.................192467
47 .........Transformer ................................. 193444 ................. 193444................ 193444 .................193444.................193444
48 .........*Pilot Tubing ................................ 193729 ................. 1417-60 .............. 1417-60 ................ 1417-60 ...............1417-60
49 .........Inlet Tube ..................................... 193729 ................. 193729 ................ 192626 ................. na .........................192626
50 .........Drain Valve................................... 26273-6 ................ 26273-6 .............. 26273-6................ 26273-6 ...............26273-6
51 .........Gas Valve Natural........................ 192827 ................. 192827................ 192827 .................192827.................192827
52 .........Gas Valve LP ............................... 192827-1.............. 192827-1 ............ 192827-1 .............. 192827-1 .............192827-1
53 .........Wire Conduit ................................ 193456-1..............193456-1 ............ 193456-1.............. 193456-1 .............193456-1
54 .........Ground Wire................................. 193448 ................. 77948-7 .............. 77948-7................ 77948-7 ...............77948-7
55 .........Switch Panel/Mounting Plate ....... 193448 .................193448................ 193448 ................. 193448.................193448
56 .........Off/On Switch ............................... 193243 ................. 193243 ................ 193243 ................. 193243.................193243
57 .........Bushing ........................................ 193404 ................. 193404................ 193404 .................193404.................193404
58 .........Jumper Wire ................................ 193476 .................193476................ 193476................. 193476.................193476
59 .........Control Box Panel........................ 193447 ................. 193447................ 193447 .................193447.................193447
60 .........Cover - Burner.............................. 98185-2................98185-2 .............. 98185-2 ................ 98185-3 ...............98185-2
61 .......... The Eliminator ..............................
62 .......... Galvanized Pipe Union, 1 1/2” ..... 195127 ..............195127.................195127 ................ 195127 ................195127
Collar............................................ 74060 ................... 74060 .................. 74060 ...................74060...................74060
BTR
BTR
193860 ................. 193860................ 193860 ................. 193860.................193860
.................200042................ 200042 ................. 200042.................200042
BTR
76243-45 .............. 76243-51 .............76243-44
BTR
195098 ..............195098.................195098 ................ 195102 ................ 195098
- 4 -
ITEM PARTS DESCRIPTION BTR 305/A BTR 365/A BTR 400/A BTR 500/A
1 ...........Flue Baffle .........................................193595....................... 193696 ........................193995 ....................... 193995
2 ...........Jacket Base ...................................... 193919 ....................... 193986 ........................193999 ....................... 193986
3 ...........Main Burner Orifice Bracket..............098044(7) ..................098044(9) ...................098044(9) .................. 098044(9)
4 ...........Main Burner....................................... 192322 .......................98047 ..........................192322 ....................... 192322
5 ...........Main Burner w/Pilot Bracket .............193873.......................193873-1 ....................193873 ....................... 193873
6 ...........Pilot Burner, Natural .........................193314-4 ...................193314-4 ....................193314-4 ................... 193314-4
7 ...........Pilot Burner, LP ................................. 193314-3 ...................193314-3 ....................193314-3 ................... 193314-3
8 ...........Floor Shield Assembly ..................... 193864-1 ................... 193984 ........................193997 ....................... 193984
9 ...........Collar.................................................74060.........................74060..........................74060 ......................... 74060
CLEANOUT ASSEMBLY
11 ....Gasket ...............................................99038.........................99038 ..........................
12 ....Pressure Plate ..................................99037 .........................99037 ..........................99037 ......................... 99037
13 ....Screws, Self Tapping ....................... 69852 ......................... 69852 ..........................69852 ......................... 69852
17 .........Control, Ignition Module ................... 193325.......................193325........................193325 ....................... 193325
18 .........Control, Dual w/ECO ........................ 192828.......................192828........................192828 ....................... 192828
19 .........Cover, Cleanout ................................181260....................... 181260 ........................181260 ....................... 181260
20 .........Cover, Inner....................................... 193391 .......................193608 ........................193392 ....................... 193608
21 .........Jacket Cover .....................................97062 .........................97062-7 ......................170256 ....................... 97062-7
22a.......Drafthood .......................................... 193891.......................193891........................193891 ....................... 193891
22b.......Damper Drive Assembly .................. 194484 ....................... 194484 ........................194484 ....................... 194484
22c .......Harness Adapter ..............................
23 .........Top Insulation ................................... 41560-56 ...................192867........................192867 ....................... 192867
LABELS
24 ....L&O Label .........................................193620.......................193620 ........................193620 ....................... 194008
26 ....Cleanout ...........................................193914.......................193914........................193914 ....................... 193914
27 ....*Bilingual Instruction ........................ 193912.......................193912........................193912 ....................... 193912
28 ....*Ultra Coat ........................................ 193860.......................193860 ........................193860 ....................... 193860
29 ....*ECO Instruction ...............................193911.......................193911 ........................193911 ....................... 193911
30 ....*Flammable Vapors .........................192872.......................192872 ........................192872 ....................... 192872
31 ....*Help Line ......................................... 190600.......................190600........................190600 ....................... 190600
32 ....*Instruction........................................170345.......................170345........................170345 ....................... 170345
33 ....*Master Fit ......................................... 193859 ....................... 193859 ........................193859 ....................... 193859
34 ....*Pilot ..................................................193915....................... 193915 ........................193915 ....................... 193915
35 ....*Propane...........................................182572.......................182572 ........................182572 ....................... 182572
36 ....*Relief Valve......................................200042....................... 200042 ........................200042 ....................... 200042
37 ....*Water Inlet .......................................161040-0 ................... 161040-0 ....................161040-0 ................... 161040-0
38 ....*Water Outlet.....................................161040-1 ...................161040-1 ....................161040-1 ................... 161040-1
39 ....*Wiring Diagram ...............................193621....................... 193621 ........................193621 ....................... 193621
40 .........Leg ....................................................193826.......................193826........................193826 ....................... 194093
41 .........Manifold............................................. 76244-3 ..................... 76244-4 ......................76244-4...................... 76244-4
42 .........*Instruction Manual ...........................195779.......................195779 ........................195779
43 .........Main Burner Orifice, NAT…… ...........76243-37 ...................76243-32 ....................76243-31 ................... 76243-28
44 .........Main Burner Orifice, LP..................... 76243-48 ................... 76243-49 ....................76243-48 ................... 76243-44
45 .........Anode Rod ........................................43817-38 ...................180618-42 ..................180618-42 ................. 180618-42
46 .........T&P Relief Valve ...............................192467.......................192467........................192467 ....................... 192467
47 .........Transformer ...................................... 193444 .......................193444........................193444 ....................... 193444
48 .........*Pilot Tubing ..................................... 1417-60 .....................1417-60 ......................1417-60...................... 1417-60
49 .........Inlet Tube .......................................... na ...............................192626........................192626 ....................... 192626
50 .........Drain Valve........................................ 26273-6 .....................26273-6 ......................26273-6 ...................... 26273-6
51 .........Gas Valve Natural.............................192827-2 ...................192827-2 ....................192827-2 ................... 193366-0
52 .........Gas Valve LP ....................................192827-3 ................... 192827-3 ....................192827-3
53 .........Wire Conduit ..................................... 193456-1 ................... 193456-1 ....................193456-1 ................... 193456-1
54 .........Ground Wire......................................77948-7 .....................77948-7 ......................77948-7...................... 77948-7
55 .........Switch Panel/Mounting Plate ............ 193448 ....................... 193448 ........................193448 ....................... 193448
56 .........Off/On Switch ....................................193243 .......................193243 ........................193243 ....................... 193243
57 .........Bushing ............................................. 193404 .......................193404 ........................193404 ....................... 193404
58 .........Jumper Wire ..................................... 193476.......................193476........................193476 ....................... 193476
59 .........Control Box Panel.............................193447....................... 193447 ........................193447 ....................... 193447
60 .........Cover - Burner...................................98185-3 .....................98185-4 ......................98185-4...................... 194111
61 .........The Eliminator .................................. 195102 ....................... 195098 ........................195098 ....................... 195102
62 .........Galvanized Pipe Union, 1 1/2” .........195127 .......................
BTR
194459....................... 194459 ........................194459 ....................... 194459
BTR
BTR
BTR
195127........................195127 ....................... 195127
99038 ......................... 99038
....................... 195779
................... 193366-1
- 5 -
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