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Parts List: A.O. Smith BTH-400A, Series 974/975

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  • You can download and print the original PDF of the A.O. Smith parts list at the bottom of the page.

 

Cyclone XHE BTH Parts List

Item Description
BTH-400A
Series 974-975
1 Cleanout Gasket 99038 (new # 100109686)
2 Cover, Cleanout 99037 (new # 100110656)
4 Cover, Right 194749 (new # 100052204)
9 Temperature and Relief Valve 99383-3 (new # 100110739)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- Standard hardware items may be purchased locally.

 

 

Cyclone XHE BTH Control Panel

Item Description
BTH-400A
Series 974-975
  Control Board, Cable Assembly (includes 4 & 4A): 195018 (new # 100109976)
5 Junction Box Assembly 194126 (new # 100109942)
11 Switch, On/Off 193243 (new # 100110744)

 

 

Cyclone XHE BTH Operating Controls and Wiring

Item Description
BTH-400A
Series 974-975
1 Cable Assembly, Power Switch 194785 (new # 100109969)
2 Blower Prover Air Switch 195013 (new # 100110806)
3 Box, Anode 194857 (new # 100109972)
4 Box, Junction 194126 (new # 100109942)
5 Cable Assembly, Low Voltage 194918 (new # 100109974)
8 Cable Assembly - Controls 194784 (new # 100109968)
9 Wire Assembly, Air Flow Switch 192802-2 (new # 100109911)
  Control Board, Cable Assembly (includes item 11 and 11A): 195018 (new # 100109976)
14 Probe, Upper 192606 (new # 100109721)
15 Probe, Lower 192609 (new # 100109726)
16 Switch, Blocked Inlet 195012 (new # 100110810)
17 Switch, Blocked Outlet - Natural Gas 194910 (new # 100110811)
17 Switch, Blocked Outlet - Propane 195017 (new # 100110887)
19 Switch, On/Off 193243 (new # 100110744)
20 Switch, Natural Gas, Low Gas Pressure 191149-6 (new # 100109878)
20 Switch, Propane, Low Gas Pressure 191149-4 (new # 100109876)
21 Transformer 192608 (new # 100109904)
22 Valve, Natural Gas 194536-5 (new # 100109959)
22 Valve, Propane 194536-6 (new # 100110885)
23 Tubing, 1/4 in. ID, PVC 193738 (new # 100109938)
24 Cable Assembly, Ignitor 194937 (new # 100109975)

 

 

Item Description
BTH-400A
Series 974-975
Recirculating System
4 Vent, Automatic Air 194830 (new # 100052273)
Detail - Gas Valve
4 Switch, Low Gas Pressure 191149-6 (new # 100109878)
4 Switch, Low Gas Pressure - Propane 191149-4 (new # 100109876)
6 Valve, Natural Gas 194536-5 (new # 100109959)
7 Orifice, Natural Gas 100050731
7 Orifice, Propane 192477-221 (new # 100110891)
8 Orifice Holder 192447 (new # 100110892)
Standard hardware items may be purchased locally.

 

 

Exhaust Elbow, Vent Kit & Blower Intake Parts

Item Description
BTH-400A
Series 974-975
1 Adapter, Hose Fitting 192472 (new # 100109900)
3 Nipple Pipe, Closed 194558 (new # 100052004)
4 Plug, Hex 194560 (new # 100052006)
5 Tee 194559 (new # 100052005)
6 Tubing 191746-72 (new # 100109886)
7 Connector, Exhaust 192636 (new # 100110947)
8 Hose Clamp, 3 in. 192696 (new # 100110948)
9 Hose Clamp, 4.5 in. 192697 (new # 100110949)
10 Elbow with Screen 192815 (new # 100108686)
12 Wall Plates (2 required) 181557 (new # 100109820)
13 Silicone Sealer, 2 oz. Tube 181564 (new # 100109821)

 

 

Blower/Burner Assembly

Item Description
BTH-400A
Series 974-975
1 Burner 194998 (new # 100111864)
2 Blower/Motor Assembly 194746 (new # 100109964)
4 Gasket 194817 (new # 100111744)
5 Gasket, Burner 195016 (new # 100052495)
6 Gasket - Viewport 194827 (new # 100110902)
7 Ignitor 192334 (new # 100110899)
11 Sensor, Flame 194776-1 (new # 100109966)
12 Window, Observation 98758-3 (new # 100110901)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- Standard hardware items may be purchased locally.

 

 

Powered Anode Assembly

Item Description
BTH-400A
Series 974-975
1 Anode 194787 (new # 100111023)
2 Anode Wire, 28 in. 194925 (new # 100052332)
3 Control Box 194857 (new # 100109972)
4 LED with Lead Wire 194959 (new # 100052344)

 

 

Download original AO Smith Parts List
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