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Parts List: A.O. Smith GB-1850, GW-1850; Series 400 / 405

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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.

 

Combustion Chamber Assembly Components:

Item Description GB/GW-1850
Series 400/405
2 Blower Assembly, Large 211096 (new # 100110413) (qty. 3)
4 Bracket, Gas Manifold 210780 (new # 100110688) (qty. 4)
5 Burner, 60mm 210757 (new # 100110710) (qty. 16)
6 Burner Assembly 211306 (new # 100110692) (qty. 3)
8 Control Panel 210740-3 (new # 100061496)
9 Flame Sensor 192682 (new # 100109908) (qty. 4)
13 Gas Train, 4 & 5 Burner - Natural Gas 211081 (new # 100110412) (qty. 4)
15 Gasket, Blower 210775 (new # 100061533) (qty. 3)
19 Gasket, Heat Exchanger (qty. 2) 210779 (new # 100061541)
20 Gasket, Ignitor 210078 (new # 100110748) (qty. 2)
21 Gasket, Observation Port 211297 (new # 100062421)
24 Igniter 192334 (new # 100110899) (qty. 2)
31 Mainfold Assembly, 5 Burner 210763 (new # 100061529) (qty. 3)
32 Nut, Hex Serrated Flange 210226 (new # 100060814) (qty. 12)
34 Observation Port Assembly (qty. 2) 98760 (new # 100110431)
35 Orifice - Natural Gas 210758-111 (new # 100061527) (qty. 19)
36 Orifice - Propane 210758-75 (new # 100061524) (qty. 19)
38 Panel, Air Box Divider with Slot 210720-1 (new # 100061435)
39 Panel, Air Diverter 211080 (new # 100061931) (qty. 3)
40 Panel, Front Combustion 210703-3 (new # 100061396)
41 Panel, Side Air Chamber 211088 (new # 100061948)
44 Plate, Divider Insert 211134 (new # 100062005)
45 Plate, Insert Mate 211309 (new # 100062435)
52 Strain Relief 210173 (new # 100060707) (qty. 3)
54 Switch, Blocked Flue 210908-2 (new # 100110589)
55 Switch, Differential 211094 (new # 100110001) (qty. 3)
56 Switch, Differential - Propane 211094-1 (new # 100110001) (qty. 3)
57 Switch, Low Gas - Natural Gas 191149-1 (new # 100109151)
57 Switch, Low Gas - Propane 191149-3 (new # 100109151)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- CSD-1 and IRI models substitue the following part numbers for the Gas Train Assemblies: Item 11 substitute with 211082-2; Item 12 substitute with 211082-3; Item 13 substitute with 211081-2; Item 14 substitute with 211081-3.

 

 

Jacket Assembly Components:

Item Description GB/GW-1850
Series 400/405
1 User Interface, Display 211762 (new # 100111940)
5 Gasket,Conduit (qty. 2) 211266 (new # 100062378)
8 Gasket, Vent Adaptor (Air Inlet) 211049-1 (new # 100061871)
9 Handle, Front Panel 191802 (new # 100050134) (qty. 2)
11 Junction Box (qty. 2) 190438-4 (new # 100049309)
12 Locknut, Star (qty. 2) 1953 (new # 100003894)
34 Valve, Ball 2-1/2 x 2-1/2 69022-3 (new # 100027027)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

Water Heater Connections:

Item Description GB-1850 or GW-1850
1 Flow Switch Conduit Assembly 211156 (new # 100062035)
2 Inlet Temp. Conduit Assembly 210180-1 (new # 100060723)
3 Low Water Cutoff 210376 (new # 100061018)
5 Outlet Conduit Assembly 210181-1 (new # 100060728)
9 Relief Valve - 50 PSI (GB-1850) 210451-2 (new # 100111923)
11+ Tank Probe (GW-1850) 210211-1 (new # 100109985)
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Item not illustrated.

 

 

Control Box Assembly:

Item Description GB/GW-1850 or GB/GW-1850 IRI
3 Central Control Board (CCB) 211758 (new # 100111255)
4 Flame Control Board (FCB) 211759 (new # 100111256) (qty. 3)
5 Relay, 120-Volt 211546 (new # 100111329)
5 Relay, 120-Volt (IRI) 211546 (new # 100111329) (qty. 2)
9 Power Distribution Board (PDB) 211760-000 (new # 100111904)
11 Transformer, 250 VA 211673 (new # 100111942)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

Wire Harness:

Item Description GB/GW-1850
Series 400/405
7 Harness, Gas Valve Relay Power 211951-001 (new # 100063640)
9 Harness, Communication (qty. 2) 211953-001 (new # 100063642)
20 Harness, Tank Probe 211989-000 (new # 100063654)
23 Harness, 24 VAC Output 211951-001 (new # 100063640)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

 

 

IRI/CSD-1 Components:

Item Description GB/GW-1850
Series 400/405
3 High Pressure Switch - Natural Gas 192527-1 (new # 100109902) (qty. 4)
3 High Pressure Switch - Propane 192527 (new # 100109901) (qty. 4)
4 Main Manual Shut-Off 69022-3 (new # 100027027)

5

 

Pilot Shut-Off Valve 200683 (new # 100059254)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- CSD-1 and IRI models substitute the following part numbers for the Gas Train Assemblies: Item 11 substitute with 211082-2; Item 12 substitute with 211082-3; Item 13 substitute with 211081-2; Item 14 substitute with 211081-3.

 

 

Download original AO Smith Parts List
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