A. O. Smith BTH-120 Parts List

COMMERCIAL WATER HEATER PARTS LIST

MODEL BTH-120, 150, 199, 250

SERIES 970 & 973

CONTROL PANEL

PAGE 2

GAS VALVE

PAGE 4

TOP COVER CONTROLS

PAGE 2

EXHAUST ELBOW &

VENT KIT PARTS

PAGE 4

BURNER ASSEMBLY

PAGE 4

PRINTED IN THE U.S.A. 0206 PART NO. 196146-003

BTH-120 BTH-120 BTH-150

ITEM DESCRIPTION 970 973 970

1 ... Cleanout Cover.....................................................................181260........................... 181260............................. 181260 ..................

2 ... Cleanout Gasket....................................................................99038 ............................. 99038 ...............................99038...................

3 ... Cleanout Plate .......................................................................99037............................. 99037...............................99037...................

4 ... Top Cover, Left.....................................................................193885........................... 193885 .............................193885..................

5 ... Top Cover, Right ..................................................................193886........................... 193886.............................193886..................

6 ... Top Cover, Back, Nat. ..........................................................193887........................... 193887.............................193887..................

6 ... Top Cover, Back, Prop. ........................................................193887........................... 193887............................. 193887..................

7 ... Drain Valve ..........................................................................26273-6 ..........................26273-6 ........................... 26273-6 .................

8 ... T & P Relief Valve ............................................................... 99465-7 ..........................99465-7 ........................... 99465-7 .................

9 ... Upper Temp. Probe w/ECO..................................................196597........................... 196597.............................196597..................

10 ... Lower Temp. Probe ..............................................................196598........................... 196598 .............................196598..................

11 ... Anode, Alum. Alloy (4)....................................................... 183523-33 ......................183523-52 ....................... 183523-52...............

12 ... LABELS

.............Cleannout Label ...............................................................78754 ............................. 78754 ............................... 78754...................

.............Flammable Vapor/Scald .............................................. 184872-000 ....................184872-000 ..................... 184872-000 ..............

.............800 Help Line Label ........................................................190600........................... 190600.............................190600..................

.............Lighting/Operation (Eng.) WR/Natural..............................193292........................... 193292 ..............................- - - - -...................

.............Lighting/Operation (Eng.) WR/Prop. ....................................- - - ............................... - - - - - ..............................193358..................

.............Lighting/Operation (Fr.) - White-Rodgers ................................193460........................... 193460 ..............................- - - - -...................

.............Lighting/Operation (Eng.) HW/Natural.............................. - - - - -............................. - - - - - ..............................192480..................

.............

.............Lighting/Operation (Fr.) HW/Natural.................................... - - - - -............................. - - - - -..............................192996..................

.............Lighting/Operation (Fr.) HW/Prop........................................ - - - - -............................. - - - - -...............................- - - - -...................

.............WARNING Label .............................................................192803 ............................ - - - - - ...............................- - - - -...................

.............Wiring Diagram Label......................................................193317 ........................... 193317 .............................192889..................

.............Water Inlet (bilingual) ......................................................161040........................... 161040 .............................161040..................

.............Water Outlet (bilingual) .................................................161040-1 ........................161040-1 ......................... 161040-1 ................

.............Relief Valve Label ...........................................................191068........................... 191068.............................191068..................

13 ... Manual*.................................................................................196145........................... 196145.............................196145..................

CYCLONE XHE BTH - CONTROL PANEL

14 ... Board, Display Panel ..........................................................194808-1 ........................194808-1 ......................... 194808-1 ................

15 ... Bracket Mounting, Left........................................................194123-1 ........................194123-1 ......................... 194123-1 ................

16 ... Bracket Mounting, Right .......................................................194123........................... 194123 .............................194123..................

17 ... Control Board &

....... Cable Assem. (includes 17a) ...............................................196473........................... 196473.............................196473..................

17a . Cable Assy, Control Board to Display Board .......................194809........................... 194809 .............................194809..................

18 ... Junction Box .........................................................................194126........................... 194126 .............................194126..................

19 ... Junction Box Cover ................................................................2233............................... 2233 .................................2233....................

20 ... Display Panel Label..............................................................194203........................... 194203 .............................194203..................

21 ... Panel, Front ..........................................................................193884........................... 193884.............................193884..................

22 ... Screw, Plastite #10-14 x 3/8" ...............................................194202........................... 194202 .............................194202..................

23 ... On/Off Switch .......................................................................193243 ........................... 193243 .............................193243..................

24 ... Cable Assembly, Line Power................................................194261........................... 194261.............................194261 ..................

BTH 120-250 TOP COVER CONTROLS

25 ... Blocked Inlet Switch, Natural Gas ........................................193293............................ - - - - -.............................. 193363..................

25 ... Blocked Inlet Switch, Propane Gas ...................................... - - - - -............................ 193356..............................- - - - -...................

26 ... Blocked Outlet Switch, Natural Gas .....................................193294............................ - - - - - ..............................193362..................

26 ... Blocked Outlet Switch, Propane Gas ................................... - - - - -............................ 193357 ..............................- - - - -...................

27 ... Blower Prover Switch ...........................................................194706........................... 194706 .............................194706..................

28 ... Blower/Motor Assembly.................................................... 196810-000 .................... 196810-000 ..................... 196811-000 ..............

29 .........Inlet Flange Assembly w/Hose Barb .............................192886-1 ........................192886-1 ......................... 192886-1................

30 .........Intake Assembly ..............................................................192815........................... 192815 .............................192815..................

31 ... BSR Assembly...................................................................... - - - - -............................. - - - - - ...............................- - - - -...................

32 .........BSR Board....................................................................... - - - - - ............................. - - - - - ...............................- - - - -...................

33 .........Resistor Board................................................................. - - - - -............................. - - - - - ...............................- - - - -...................

Lighting/Operation (Eng.) WR/ Prop.................................. - - - - -............................. - - - - - ...............................- - - - -...................

BTH-120, BTH-120, BTH-120, BTH-120, BTH-120,

BTH-150 BTH-199 BTH-199 BTH-250

973 970 973 970

........................................ 181260 ................................ 181260 .................................181260 ................................. 181260

......................................... 99038 .................................. 99038 ...................................99038 ................................... 99038

......................................... 99037 .................................. 99037 ...................................99037 ................................... 99037

........................................ 193885 ................................ 193885 .................................193885 ................................. 193885

........................................ 193886 ................................ 193886 .................................193886 ................................. 193886

........................................ 193887 ................................ 193887 .................................193887 ................................. 193887

........................................ 193887 ................................ 193887 .................................193887 .................................. - - - - -

150, 199, 250

........................................26273-6 .............................. 26273-6 ............................... 26273-6 ................................ 26273-6

........................................99465-7 .............................. 99465-7................................ 99465-7................................. 192467

........................................ 196597 ................................ 196597 .................................196597 ................................. 196597

........................................ 196598 ................................ 196598 .................................196598 ................................. 196598

......................................183523-52 .......................... 183523-52............................ 183523-52 .............................183523-52

......................................... 78754 .................................. 78754 ...................................78754 ................................... 78754

.....................................184872-000 ........................ 184872-000.......................... 184872-000 ...........................184872-000

........................................ 190600 ................................ 190600 .................................190600 ................................. 190600

......................................... - - - - - .................................. - - - - - ...................................- - - - - .................................. 193358

........................................ 193358 ................................ 193358 .................................193358 .................................. - - - - -

......................................... - - - - - .................................. - - - - - ...................................- - - - - ................................... - - - - -

150, 199, 250

........................................ 192480 ................................ 192480 .................................192480 .................................. - - - - -

......................................... - - - - - .................................. - - - - - ...................................- - - - - ................................... - - - - -

........................................ 192996 ................................ 192996 .................................192996 .................................. - - - - -

......................................... - - - - - .................................. - - - - - ...................................- - - - - ................................... - - - - -

......................................... - - - - -

........................................ 192889 ................................ 192889 .................................192889 ................................. 193204

........................................ 161040 ................................ 161040 .................................161040 ....

.......................................161040-1 ............................ 161040-1.............................. 161040-1 ...............................161040-1

........................................ 191068 ................................ 191068 .................................191068 ................................. 191068

........................................ 196145 ................................ 196145 .................................196145 ................................. 196145

............................. 161040

.......................................194808-1 ............................ 194808-1.............................. 194808-1 ...............................194808-1

150, 199, 250

.......................................194123-1 ............................ 194123-1.............................. 194123-1 ...............................194123-1

........................................ 194123 ................................ 194123 .................................194123 ................................. 194123

........................................ 196473 ................................ 196473 .................................196473 ................................. 196473

........................................ 194809 ................................ 194809 .................................194809 ................................. 194809

........................................ 194126 ................................ 194126 .................................194126 ................................. 194126

.......................................... 2233 ....................................2233 ..................................... 2233 ..................................... 2233

........................................ 194203 ................................ 194203 .................................194203 ................................. 194203

........................................ 193884 ................................ 193884 .................................193884 ................................. 193884

........................................ 194202 ................................ 194202 .................................194202 ................................. 194202

........................................ 193243 ................................ 193243 .................................193243 ................................. 193243

150, 199, 250

........................................ 194261 ................................ 194261 .................................194261 ................................. 194261

......................................... - - - - - ................................. 193363 ..................................- - - - - .................................. 193361

........................................ 193355 ................................. - - - - - ..................................195012 .................................. - - - - -

......................................... - - - - - ................................. 193364 ..................................- - - - - .................................. 193357

........................................ 193357 ................................. - - - - - ..................................193357 .................................. - - - - -

........................................ 194706 ................................ 194706 .................................194706 ................................. 194706

.....................................196810-000 ........................ 196811-000.......................... 196810-000 ...........................196812-000

.......................................192886-1 ............................ 192886-1.............................. 192886-1 ...............................192886-1

........................................ 192815 ................................ 192815 .................................192815 ....

......................................... - - - - - .................................. - - - - - ...................................- - - - - ................................... - - - - -

150, 199, 250

......................................... - - - - - .................................. - - - - - ...................................- - - - - ................................... - - - - -

............................. 194116

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