A O Smith 976 Series Parts List Commercial Gas Cyclone XHE, BTH 300A 400A, 977
977 Series 197177-002
977 Series to the manual 0541a263-2137-4927-b5cf-ea51390a0312
2015-01-05
: A-O-Smith A-O-Smith-976-Series-Parts-List-162806 a-o-smith-976-series-parts-list-162806 a-o-smith pdf
Open the PDF directly: View PDF 
.
Page Count: 8
1
COMMERCIAL WATER HEATER PARTS LIST
Model BTH-300A
Model BTH-400A
Series 976/977
PRINTED IN U.S.A. 0606 PART NO. 197177-002
BLOWER/BURNER ASSEMBLY
See Page 5
GAS VALVE
See Page 5
OPERATING CONTROL WIRING
See Page 3- 4
CONTROL PANEL
See Page 3
POWERED ANODE ASSEMBLY
See Page 7
CYCLONE XHE - MODEL BTH-300A/400A
See Page 2
EXHAUST ELBOW, VENT KIT & BLOWER
INTAKE PARTS
See Page 6
2
BTH 300A BTH 400A
Item Description 976/977 976/977
1 Cleanout Gasket ........ 9004099015 ....... 9004099015
2 Cover, Cleanout ......... 9004098005 ....... 9004098005
3 Temperature and
Pressure Relief Valve... 9005903205 ....... 9005903205
CYCLONE XHE BTH 300A/400A - PARTS LIST
Standard hardware items may be
purchased locally.
3
BTH 300A BTH 400A
Item Description 976/977 976/977
1 Switch, On/Off ....................................................................................... 9005929215 ... 9005929215
2 VFD & Control Assembly ..............................................................................------.......... 9006081205
3 Transformer........................................................................................... 9004515205 ... 9004515205
4 Probe, Upper ......................................................................................... 9004238215 ... 9004238215
5 Probe, Lower ......................................................................................... 9004241215 ... 9004241215
6 Display Board ........................................................................................ 9004593205 ... 9004593205
7 Cable Assembly .................................................................................... 9006082215 ... 9006082215
8 Switch, Blocked Inlet ............................................................................. 9006083215 ... 9006006215
9 Blower Prover Air Switch ....................................................................... 9004586215 ... 9006002215
10 Switch, Natural Low Gas Pressure ........................................................ 9006084215 ... 9006084215
10 Switch, LP Low Gas Pressure ............................................................... 9004474215 ... 9004474215
11 Valve, Natural Gas ................................................................................ 9006085205 ... 9006085205
11 Valve, LP Gas ....................................................................................... 9006086205 ... 9006086205
12 Switch, Blocked Outlet .......................................................................... 9006087215 ... 9006088215
13 Tubing, 1/4" ID, PVC ............................................................................. 9006089215 ... 9006089215
CYCLONE XHE BTH 300A/400A - OPERATING CONTROLS & WIRING (See Next Page)
4
CYCLONE XHE BTH 300A/400A - CONNECTIONS (Continued)
5
GAS VALVE
BTH 300A BTH 400A
Item Description 976/977 976/977
1 Switch, Low Gas Pressure .... 9006084215 ...........9006084215
LP Gas .................................. 9004474215 ...........9004474215
2 Valve, NAT Gas .................... 9006085205 ...........9006085205
Valve, LP Gas ....................... 9006086205 ...........9006086205
3 Orifice, NAT .......................... 9006090215 ...........9006091215
Orifice, LP ............................. 9006092215 ...........9006093215
4 Orifice holder ........................ 9006094215 ...........9006094215
Standard hardware items may be purchased locally.
BLOWER/BURNER ASSEMBLY
BTH 300A BTH 400A
Item Description 976/977 976/977
1 Gasket - 8" ...................................... 9006095205 .... 9006095205
2 Shield - Heat ................................... 9006096205 .... 9006096205
3 Gasket - Insulation .......................... 9006097205 .... 9006097205
4 Flange - Burner ............................... 9006098205 .... 9006098205
5 Burner Assembly............................. 9006099205 .... 9006099205
6 Gasket - Burner .............................. 9006100205 .... 9006100205
7 Ignitor .............................................. 9006101205 .... 9006101205
8 Window - Observation..................... 9006102215 .... 9006102215
9 Gasket - Viewport ........................... 9006103215 .... 9006103215
10 Screw - Socket Head Cap............... 9006104215 .... 9006104215
11 Blower/Motor ................................... 9006105205 .... 9006114205
12 Sensor - Flame ............................... 9006106205 .... 9006106205
13 Coupling - Power Vent .................... 9006107205 .... 9006107205
14 Blower Intake Reducer Assembly. .. 9006108205 .... 9006108205
6
BTH 300A BTH 400A
Item Description 976/977 976/977
EXHAUST ELBOW AND FITTINGS
1 Exhaust Elbow Assembly ............................................................................................ 9006109205..... 9006109205
2 Tubing ......................................................................................................................... 9006110215..... 9006110215
3 Connector, Exhaust ..................................................................................................... 9006111205..... 9006111205
VENT KIT PARTS
4 Intake/Vent Terminal ................................................................................................... 9006112205..... 9006112205
5 Wall Plates (2 required)............................................................................................... 9006113205..... 9006113205
6 Silicone Sealer, 2 oz. tube ............................................................................................... 181564............. 181564
EXHAUST ELBOW, VENT KIT & BLOWER INTAKE PARTS
7
BTH 300A BTH 400A
Item Description 976/977 976/977
1 Anode ........................................................................................................ 194787 .......... 194787
2 Control Box............................................................................................ 9004595205 .. 9004595205
3 LED w. Lead Wire ..................................................................................... 194959 .......... 194959
POWERED ANODE ASSEMBLY
8
A.O. Smith Water Heater Parts Fulfillment
125 Southeast Parkway
Franklin, TN 37068
1-800-433-2545
www.hotwater.com
