A.O. Smith 970 User Manual

PSD-3-443/c

COMMERCIAL WATER HEATER PARTS LIST

MODEL BTH-300A

POWEREDANODEASSEMBLY

SERIES 970/971

See Page 8 MODEL BTH-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
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PRINTED IN U.S.A. 0604

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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.

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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

7Label, Display Panel

8Label, Led

9Panel Front

10Screw, Plastic

11Switch,Off/On

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

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