AO Smith Water Heater 970 Series User Manual

PSD-3-443/c  
COMMERCIAL WATER HEATER PARTS LIST  
MODEL BTH-300A  
SERIES 970/971  
POWEREDANODEASSEMBLY  
See Page 8  
MODEL BTH-400A  
SERIES 970  
OPERATINGCONTROLWIRING  
See Page 4  
CYCLONEXHE-MODELBTH-300A/400A  
See Page 2  
GAS VALVE  
See Page 5  
RECIRCULATINGSYSTEM  
See Page 5  
BLOWER/BURNERASSEMBLY  
See Page 7  
EXHAUST ELBOW, VENT KIT & BLOWER  
INTAKEPARTS  
CONTROLPANEL  
See Page 3  
6  
PRINTEDINU.S.A.0604  
195788-001  
CYCLONE XHE BTH 300A/400A - PARTS LIST  
BTH 300A  
970/971  
BTH 400A  
970/971  
Item Description  
1
2
3
4
5
7
CleanoutGasket.............. 99038............ 99038  
Cover,Cleanout ............... 99037............ 99037  
Cover,Left ...................... 194748 .......... 194748  
Cover,Right .................... 194749 .......... 194749  
DrainValve ..................... 26273-4 ........ 26273-4  
Labels:  
800 Help Line ................. 190600 .......... 190600  
C.E.C. ............................. 42985............ 42985  
Cleanout .......................... 78754............ 78754  
ECO .............................. 192282-1 ...... 192282-1  
ElectronicIgnition ............ 77860............ 77860  
FlammableVapors ......... 193302 .......... 193302  
Lighting&Operating ....... 194548 .......... 194548  
ReliefValve..................... 191068 .......... 191068  
UL................................... 192870 .......... 192870  
Ultra Coat ....................... 193860 .......... 193860  
Warning .......................... 193912 .......... 193912  
Water Inlet ....................... 94519............ 94519  
Water Outlet .................... 94518............ 94518  
WiringDiagram ............... 194772 .......... 194772  
Panel, Back.................... 194750 .......... 194750  
Temperatureand  
8
9
PressureReliefValve...... 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  
970/971  
BTH400A  
970/971  
Item  
1
2
Description  
Board, Display Panel ............................ 194808............ 194808  
Bracket, Mounting Left ......................... 194123-1 ......... 194123-1  
Bracket, Mounting Right........................ 194123............ 194123  
Control Board, Cable Assembly  
3
(includes 4 & 4A) .................................. 194811............ 195018  
Control Board..................................... 194812............ 195010  
Cable Assembly ................................ 194809............ 194809  
Junction Box Assembly ........................ 194126............ 194126  
JunctionBoxCover ................................. 2233 ............... 2233  
Label, Display Pan
Label, Led ...........
Panel Front .........
Screw, Plastic.....
Switch,Off/On......
4
4A  
5
6
7
8
9
10  
11  
CYCLONE XHE BTH 300A/400A - OPERATING CONTROLS & WIRING (See Next Page)  
BTH 300A  
970/971  
BTH 400A  
970/971  
Item Description  
1
2
3
4
5
7
8
9
10  
Cable Assembly, Power Switch ..................................................................194785............ 194785  
BlowerProverAirSwitch .............................................................................194706............ 195013  
Box, Anode .................................................................................................194857............ 194857  
Box, Junction ..............................................................................................194126............ 194126  
Cable Assembly, Low Voltage ....................................................................194918............ 194918  
Wire Harness ..............................................................................................194783............ 194783  
Cable, Assembly - Controls ........................................................................194784............ 194784  
Wire Assembly - Air Flow Switch.............................................................. 192802-2 ......... 192802-2  
Wire Assembly - Air Flow Switch............................................................. 192802-1 ......... 192802-1  
Control Board, Cable Assembly (Includes Item 11 & 11A) ..........................194811............ 195018  
Control Board...........................................................................................194812............ 195010  
Cable Assembly ......................................................................................194809............ 194809  
DisplayBoard .............................................................................................194808............ 194808  
ElectronicControl .......................................................................................194747............ 194747  
Probe,Upper ...............................................................................................196597............ 196597  
Probe,Lower ...............................................................................................196598............ 196598  
Switch, Blocked Inlet ..................................................................................194911............ 195012  
Switch, Blocked Outlet - NAT .....................................................................194910............ 194910  
Switch, Blocked Outlet - LP........................................................................195017............ 195017  
Pump,Recirculation....................................................................................194799............ 194799  
Switch,On/Off.............................................................................................193243............ 193243  
Switch, NAT, Low Gas Pressure............................................................. 191149-6 ......... 191149-6  
Switch, LP ,Low Gas Pressure ................................................................. 191149-4 ......... 191149-4  
Transformer .................................................................................................192608............ 192608  
Valve,NaturalGas .................................................................................... 194536-5 ......... 194536-5  
Valve, LP Gas ........................................................................................... 194536-6 ......... 194536-6  
Tubing, 1/4" ID, PVC ...................................................................................193738............ 193738  
CableAssembly, Igniter ..............................................................................194937............ 194937  
11  
11A  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
22  
23  
24  
3
DETAIL 2 - CYCLONE XHE BTH 300A - CONNECTIONS (Continued)  
4