AO Smith Water Heater BTH 120 A User Manual
COMMERCIAL GAS SERVICE PARTS LIST  
MODELS:  
BTH 120/A  
BTH 150/A  
BTH 199/A  
BTH 250/A  
Series:  
A.O. Smith Water Heater Parts Fulfillment  
125 Southeast Parkway • Franklin, TN 37068  
www.hotwater.com • 1-800-433-2525  
100/101  
BTHCYCLONEXi-MODELBTH-120/A-250/A  
DISPLAYCONTROLASSEMBLY  
See Page 2  
INNERCOVERCONTROLASSEMBLY  
See Page 2  
See Page 3  
BLOWER/BURNERASSEMBLY  
See Page 4 & 5  
GASVALVE(S)  
See Page 6  
ELECTRONIC ANODE  
See Page 7  
EXHAUST ELBOWASSEMBLY-VENTKITASSEMBLY  
See Page 7  
A.O. Smith Water Heater Parts Fulfillment • phone: 1-800-433-2545 • www.hotwater.com  
PRINTED 0607  
197728-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
BTH CYCLONE Xi INNER COVER CONTROL ASSEMBLY - MODELS 120/A & 150/A  
BTH120/A  
BTH150/A  
Item  
Description  
100  
101  
100  
101  
1 ...... Controller ........................ 9006262005 ..... 9006266005 .......... 9006263005 ..... 9006267005  
2 ...... Switch-blockedoutlet...... 9006287015 ..... 9006287015 .......... 9006289015 ..... 9006287015  
3 ...... Switch-inlet ..................... 9006288015 ..... 9006281015 .......... 9006288015 ..... 9006281015  
4 ...... Switch-prover .................. 9006280015 ..... 9006280015 .......... 9006280015 ..... 9006280015  
5 ...... Upperprobe .................... 9004238215 ..... 9004238215 .......... 9004238215 ..... 9004238215  
BTH CYCLONE Xi INNER COVER CONTROL ASSEMBLY - MODELS 199/A & 250/A  
BTH199/A  
BTH250/A  
Item  
Description  
100  
101  
100  
101  
1 ...... Controller ........................ 9006264005 ..... 9006268005 .......... 9006265005 ..... 9006269005  
2 ...... Switch-blockedoutlet...... 9006289015 ..... 9006282015 .......... 9006282015 ..... 9006282015  
3 ...... Switch-inlet ..................... 9006288015 ..... 9006281015 .......... 9006281015 ..... 9006281015  
4 ...... Switch-prover .................. 9006280015 ..... 9006280015 .......... 9006280015 ..... 9006280015  
5 ...... Upperprobe .................... 9004238215 ..... 9004238215 .......... 9004238215 ..... 9004238215  
Standard hardware items may be purchased locally.  
A.O. Smith Water Heater Parts Fulfillment • phone: 1-800-433-2545 • www.hotwater.com  
PRINTED0607  
197728-001  
3
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BURNER / BLOWER ASSEMBLY - MODELS 120/A & 150/A  
BTH120/A  
BTH150/A  
Item  
Description  
100  
101  
100  
101  
1 ...... Blower ....................................................... 9006272005 ....... 9006272005 ........ 9006273005 ..... 9006273005  
2 ...... Burner ....................................................... 9006275005 ....... 9006276005 ........ 9006277005 ..... 9006278005  
3 ...... BurnerFlange ........................................... 197256-000.........197256-000 .........197256-000.......197256-000  
4 ...... BurnerGasket .......................................... 197257-000.........197257-000 .........197257-000.......197257-000  
5 ...... CondensateTee........................................ 181865-000.........181865-000 .........181865-000.......181865-000  
6 ...... Coupling-PowerVent ................................ 9006107205 ....... 9006107205 ........ 9006107205 ..... 9006107205  
7 ...... FlameSensor ........................................... 9006106205 ....... 9006106205 ........ 9006106205 ..... 9006106205  
8 ...... Flange Gasket .......................................... 194817-000.........194817-000 .........194817-000.......194817-000  
9 ...... Hose Barb 1/2" x 1/4" ............................... 181863-000.........181863-000 .........181863-000.......181863-000  
10 ..... Igniter ........................................................ 9006101205 ....... 9006101205 ........ 9006101205 ..... 9006101205  
11 ..... ObservationWindow ................................. 9006102215 ....... 9006102215 ........ 9006102215 ..... 9006102215  
12 ..... Screen Wire.............................................. 9006027015 ....... 9006027015 ........ 9006027015 ..... 9006027015  
13 ..... Stud 5-16-18 x 1 3/4" ................................ 196881-000.........196881-000 .........196881-000.......196881-000  
14 ..... Truss Hd Machine Screw 1/4-20 x 1.00" ... 194816-000.........194816-000 .........194816-000.......194816-000  
15 ..... ViewportGasket ....................................... 9006103215 ....... 9006103215 ........ 9006103215 ..... 9006103215  
A.O. Smith Water Heater Parts Fulfillment • phone: 1-800-433-2545 • www.hotwater.com  
PRINTED 0607  
197728-001  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
BLOWER / BURNER ASSEMBLY - MODELS 199/A & 250/A  
BTH 199/A & 250/A  
100  
BTH 199/A & 250/A  
101  
Item  
Description  
1...... Blower Assembly...................................... 9006274005 ....................................... 9006274005  
2...... Burner ....................................................... 9006279005 ....................................... 9006279005  
3...... Burner-Adapter ........................................197607-000 ....................................... 197607-000  
4...... Burner - Gasket A .....................................197618-000 ....................................... 197618-000  
5...... BurnerFlange ............................................197611-000 ....................................... 197611-000  
6...... Burner Gasket B........................................197257-000 ....................................... 197257-000  
7...... CondensateTee ........................................181865-000 ....................................... 181865-000  
8...... FlameSensor ........................................... 9006106205 ....................................... 9006106205  
9...... Flange-Gasket ...........................................194817-000 ....................................... 194817-000  
10 .... Gas Valve - Venturi Assembly .................. 9006285005 ....................................... 9006286005  
11 .... Hose Barb .................................................181863-000 ....................................... 181863-000  
12 .... Igniter ....................................................... 9006101205 ....................................... 9006101205  
13 .... IntakeConnector .......................................197604-000 ....................................... 197604-000  
14 .... Low gas switch ......................................... 9006255015 ....................................... 9006256015  
15 .... ObservationWindow ................................. 9006102215 ....................................... 9006102215  
16 .... Stud 5/16-18 x 1 3/4".................................196881-000 ....................................... 196881-000  
17 .... Truss Hd. Mach. Screw 1/4-20 x 1.00 .......194816-000 ....................................... 194816-000  
18 .... Venturi Gasket ..........................................197789-000 ....................................... 197789-000  
19 .... VenturiMountingScrew .............................197790-000 ....................................... 197790-000  
20 .... ViewportGasket ....................................... 9006103215 ....................................... 9006103215  
21 .... Wire Screen ............................................. 9006027015 ....................................... 9006027015  
*Item may be purchased from local hardware store.  
A.O. Smith Water Heater Parts Fulfillment • phone: 1-800-433-2545 • www.hotwater.com  
PRINTED 0607  
197728-001  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
GAS VALVE ASSEMBLY - MODELS 120/A  
BTH120/A  
100  
BTH120/A  
101  
Item  
Description  
1...... GasValve ................................................. 9004535205 .......................................9004536205  
2...... Orifice ....................................................... 9006259015 .......................................9006257015  
3...... OrificeHolder ............................................ 9006094215 .......................................9006094215  
4...... Switch-LowGasPressure ........................ 9006256015 .......................................9006255015  
GAS VALVE ASSEMBLY - MODELS 150/A  
BTH150/A  
100  
BTH150/A  
101  
Item  
Description  
1...... GasValve ................................................. 9006283005 .......................................9006284005  
2...... Orifice ....................................................... 9006260015 .......................................9006258015  
3...... OrificeHolder ............................................ 9006094215 .......................................9006094215  
4...... Switch-LowGasPressure ........................ 9006256015 .......................................9006255015  
A.O. Smith Water Heater Parts Fulfillment • phone: 1-800-433-2545 • www.hotwater.com  
PRINTED 0607  
197728-001  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
EXHAUST CONNECTOR ASSEMBLY - MODELS 120/A - 250/A  
BTH 120/A - 250/A  
Item  
Description  
100 / 101  
1...... ExhaustConnector ................................... 9006157205  
2...... Exhaust Elbow Assembly......................... 9006261005  
*2...... Exhaust Elbow Assembly (Canada) ......... 9006332005  
3...... Tubing-Condensate ................................... 9006110215  
*Effective July 1, 2008  
VENT KIT ASSEMBLY - MODELS 120/A - 250/A  
BTH 120/A - 250/A  
Item  
Description  
100 / 101  
1...... Exhaust Screen........................................ 9006027015  
2...... Intake-ScreenCollarAssembly ................. 182162-000  
3...... PVC 45 Degree Elbow ...............................181901-000  
3...... PVC45DegreeElbow(Canada) ................197868-000  
4...... Silicone..................................................... 9004366105  
5...... Wall Plate................................................. 9004364105  
ELECTRONIC ANODE ASSEMBLY - MODELS 120/A - 250/A  
BTH120/A  
100 / 101  
BTH 150/A, 199/A, 250/A  
100 / 101  
Item  
Description  
1...... ElectronicAnode ........................................... - - - - -............................................9006246005  
2...... ElectronicAnode ...................................... 9006247005 .......................................9006247005  
A.O. Smith Water Heater Parts Fulfillment • phone: 1-800-433-2545 • www.hotwater.com  
PRINTED0607  
197728-001  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
OPTIONAL VENT KIT ASSEMBLY FOR 4" VENTING (ALL MODELS) #9006311005 (U.S.)  
BTH 120/A thru 250/A  
Item  
Description  
100 / 101  
1...... Silicone..................................................... 9004366105  
2...... Wall Plate..................................................197392-000  
3...... Vent Terminal Assembly 4" .......................197804-000  
OPTIONAL VENT KIT ASSEMBLY FOR 4" VENTING (ALL MODELS) #9006339005 (CANADA)  
BTH 120/A thru 250/A  
Item  
Description  
100 / 101  
1...... Silicone..................................................... 9004366105  
2...... Wall Plate..................................................197392-000  
3...... Vent Terminal Assembly 4" .......................197879-000  
A.O. Smith Water Heater Parts Fulfillment  
125 Southeast Parkway  
Franklin, TN 37068  
1-800-433-2545  
www.hotwater.com  
PRINTED 0607  
197728-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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