A.O. Smith 970 Series User Manual

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COMMERCIAL WATER HEATER PARTS LIST

MODEL BTH-300A

POWEREDANODEASSEMBLY

SERIES 970/971

See Page 8 MODELBTH-400A

SERIES 970

OPERATING CONTROL WIRING

See Page 4

CYCLONEXHE-MODELBTH-300A/400A

See Page 2

GAS VALVE

See Page 5

RECIRCULATINGSYSTEM

See Page 5

BLOWER/BURNERASSEMBLY

See Page 7

CONTROLPANEL

EXHAUST ELBOW, VENT KIT & BLOWER

See Page 3

INTAKE PARTS

 

See Page 6

PRINTED IN U.S.A. 0604

1

195788-001

CYCLONE XHE BTH 300A/400A - PARTS LIST

 

 

BTH 300A

BTH 400A

 

 

Item

Description

970/971

970/971

1

Cleanout Gasket ..............

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

99038

2

Cover,Cleanout ...............

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

99037

3

Cover,Left ......................

194748 ..........

194748

4

Cover, Right ....................

194749 ..........

194749

5

Drain Valve .....................

26273-4 ........

26273-4

7

Labels:

 

 

 

800 Help Line .................

190600 ..........

190600

 

C.E.C. .............................

42985 ............

42985

 

Cleanout ..........................

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

78754

 

ECO ..............................

192282-1 ......

192282-1

 

Electronic Ignition ............

77860 ............

77860

 

Flammable Vapors .........

193302 ..........

193302

 

Lighting & Operating .......

194548 ..........

194548

 

Relief Valve .....................

191068 ..........

191068

 

UL...................................

192870 ..........

192870

 

Ultra Coat .......................

193860 ..........

193860

 

Warning ..........................

193912 ..........

193912

 

Water Inlet .......................

94519 ............

94519

 

Water Outlet ....................

94518 ............

94518

 

Wiring Diagram ...............

194772 ..........

194772

8

Panel, Back ....................

194750 ..........

194750

9

Temperatureand

 

 

 

Pressure Relief Valve ......

99383-3 ........

99383-3

NOTE: Underlined parts are recommended stock items for emergency replacement. Consider gas used in your area only.

*Not illustrated.

Standard hardware items may be purchased locally.

2

CYCLONE XHE BTH 300A/400A - CONTROL PANEL

 

 

BTH300A

BTH400A

 

 

Item

Description

970/971

970/971

1

Board, Display Panel ............................

194808 ............

194808

2

Bracket, Mounting Left .........................

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

194123-1

3

Bracket, Mounting Right ........................

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

194123

 

Control Board, Cable Assembly

 

 

 

(includes 4 & 4A) ..................................

194811 ............

195018

4

Control Board .....................................

194812 ............

195010

4A

Cable Assembly ................................

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

194809

5

Junction Box Assembly ........................

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

194126

6

Junction Box Cover .................................

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

2233

7

Label, Display Panel .............................

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

194203

8

Label, Led .............................................

194915 ............

194915

9

Panel Front ...........................................

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

193884

10

Screw, Plastic.......................................

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

194202

11

Switch,Off/On ........................................

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

193243

CYCLONE XHE BTH 300A/400A - OPERATING CONTROLS & WIRING (See Next Page)

 

 

BTH 300A

BTH 400A

 

 

Item

Description

970/971

970/971

1

Cable Assembly, Power Switch ..................................................................

194785............

194785

2

Blower Prover Air Switch .............................................................................

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

195013

3

Box, Anode .................................................................................................

194857............

194857

4

Box, Junction ..............................................................................................

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

194126

5

Cable Assembly, Low Voltage ....................................................................

194918............

194918

7

Wire Harness ..............................................................................................

194783............

194783

8

Cable, Assembly - Controls ........................................................................

194784............

194784

9

Wire Assembly - Air Flow Switch ..............................................................

192802-2 .........

192802-2

10

Wire Assembly - Air Flow Switch .............................................................

192802-1 .........

192802-1

 

Control Board, Cable Assembly (Includes Item 11 & 11A) ..........................

194811............

195018

11

Control Board ...........................................................................................

194812............

195010

11A

Cable Assembly ......................................................................................

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

194809

12

Display Board .............................................................................................

194808............

194808

13

Electronic Control .......................................................................................

194747............

194747

14

Probe, Upper ...............................................................................................

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

196597

15

Probe, Lower ...............................................................................................

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

196598

16

Switch, Blocked Inlet ..................................................................................

194911............

195012

17

Switch, Blocked Outlet - NAT .....................................................................

194910............

194910

 

Switch, Blocked Outlet - LP ........................................................................

195017............

195017

18

Pump, Recirculation ....................................................................................

194799............

194799

19

Switch, On/Off.............................................................................................

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

193243

20

Switch, NAT, Low Gas Pressure .............................................................

191149-6 .........

191149-6

 

Switch, LP ,Low Gas Pressure .................................................................

191149-4 .........

191149-4

21

Transformer .................................................................................................

192608............

192608

22

Valve, Natural Gas ....................................................................................

194536-5 .........

194536-5

22

Valve, LP Gas ...........................................................................................

194536-6 .........

194536-6

23

Tubing, 1/4" ID, PVC ...................................................................................

193738............

193738

24

Cable Assembly, Igniter ..............................................................................

194937............

194937

3

DETAIL 2 - CYCLONE XHE BTH 300A - CONNECTIONS (Continued)

4

RECIRCULATING SYSTEM

 

 

BTH 300A

BTH 400A

 

 

Item

Description

970/971

970/971

1

Elbow, 3/4" Female - 3/4" Female

........................................................... 194873 .................

194873

2

Elbow, 3/4" Male - 1" Female .................................................................

194872 .................

194872

3

Hose, Flexible .........................................................................................

194912 .................

194912

4

Nipple, 3/4" - Pipe x 2" ...........................................................................

194921-3 ..............

194921-3

5

Nipple, 3/4" - Pipe x 4" ...........................................................................

194921-2 ..............

194921-2

6

Nipple, 3/4" - Pipe x close .....................................................................

194921-1 ..............

194921-1

7

Pump, Recirculation ................................................................................

194799 .................

194799

8

Tee,Non-Reducing ..................................................................................

194870 .................

194870

9

Tube, Closed End Dip .............................................................................

194924 .................

194924

10

Tube, Inlet ...............................................................................................

194820 .................

194820

11

Vent, Automatic Air ................................................................................

194830 .................

194830

Standard hardware items may be purchased locally.

DETAIL 4 - GAS VALVE

 

Item

Description

BTH 300A

BTH 400A

 

 

970/971

970/971

1

Nipple, 3/4" - Pipe ......................................

85040-18 ........

85040-18

2

Nipple, 1/8" - Pipe ......................................

192948-2 ........

192948-2

3

Pipe, Union ...................................................

95515 ............

95515

4

Switch, Low Gas Pressure .........................

191149-6 ........

191149-6

 

 

LP Gas ....................................................

191149-4 .......

191149-4

5

Tee,Non-Reducing ........................................

40119 ............

40119

6

Valve, NAT Gas .........................................

194536-5 ........

194536-5

 

 

Valve, LP Gas ............................................

194536-6 ........

194536-6

7

Orifice, NAT ...............................................

192477-7 .........

192477

 

 

Orifice, LP ..................................................

192477-8 ........

192477-9

8

Orifice holder ................................................

192447 ..........

192447

Standard hardware items may be purchased locally.

5

EXHAUST ELBOW, VENT KIT & BLOWER INTAKE PARTS

 

 

BTH 300A

BTH 400A

 

 

Item

Description

970/971

970/971

EXHAUST ELBOW AND FITTINGS

 

 

1

Adapter, Hose Fitting .......................................................................................................

192472 ..............

192472

2

Elbow, 90° .......................................................................................................................

194836 ..............

194836

3

Nipple, Pipe, Closed ........................................................................................................

194558 ..............

194588

4

Plug, Hex .........................................................................................................................

194560 ..............

194560

5

Tee ...................................................................................................................................

194559 ..............

194559

6

Tubing ............................................................................................................................

191746-72 ........

191746-72

7

Connector, Exhaust .........................................................................................................

192636 ..............

192636

8

Hose Clamp, 3" ................................................................................................................

192696 ..............

192696

9

Hose Clamp, 4.5" .............................................................................................................

192697 ..............

192697

VENT KIT PARTS

 

 

10

Elbow w/Screen ...............................................................................................................

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

195009

11

Elbow, 45° x 3.5" dia........................................................................................................

181901 ..............

181901

12

Screen .............................................................................................................................

181662 ..............

195008

13

Intake Terminal ................................................................................................................

182167 ..............

182167

14

Wall Plates (2 Req'd) .......................................................................................................

181557 ..............

181557

15

Silicone Sealer, 2 oz. tube ...............................................................................................

181564 ..............

181564

BLOWER INTAKE PARTS

 

 

16

Coupling ...........................................................................................................................

182094 ..............

182094

17

Hose Clamp .....................................................................................................................

194838 ..............

194838

18

Tube, Intake .....................................................................................................................

194923 ..............

194923

19

Vent Terminal, Intake .......................................................................................................

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

192815

 

# Dash number indicates inches.

 

 

 

* Not Illustrated.

 

 

192815

195009

6

BLOWER/BURNER - ASSEMBLY

 

 

BTH 300A

BTH 400A

 

 

Item

Description

970/971

970/971

1

Burner ..................................................................................................

194779 ................

194998

2

Blower/Motor Assembly .......................................................................

194746 ................

194746

3

Flange-Burner ......................................................................................

194960 ................

194960

4

Gasket .................................................................................................

194817 ................

194817

5

Gasket, Burner ....................................................................................

194777 ................

195016

6

Gasket-Viewport ..................................................................................

194827 ................

194827

7

Ignitor ...................................................................................................

192334 ................

192334

8

Screw, #8-18x 1/2 ...............................................................................

192698 ................

192698

9

Screw, Socket Head Cap .....................................................................

192515 ................

192515

10

Screw, Truss Hd. Mach 1/4-20x 2.00 . ................................................

194816 ................

194816

11

Sensor, Flame ....................................................................................

194776-1 .............

194776-1

12

Window, Observation ...........................................................................

98758-3 ..............

98758-3

Standard hardware items may be purchased locally.

7

POWERED ANODE ASSEMBLY

 

 

BTH 300A

BTH 400A

 

 

Item

Description

970/971

970/971

1

Anode .........................................................................................................

194787 ............

194787

2

Anode Wire, 28" ..........................................................................................

194925 ............

194925

3

Control Box .................................................................................................

194857 ............

194857

4

LED w. Lead Wire .......................................................................................

194959 ............

194959

A.O. SMITH WATER PRODUCTS COMPANY

5621 W. 115TH STREET • ALSIP, ILLINOIS 60803

PHONE: 1-800-433-2545• FAX:1-800-433-2515Website: www.hotwater.com •E-mail:www.hotwater.com/parts

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