On Demand Water Heater (OD-5001)

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1a: Burner Assy (45,000 Btu)
1b: Burner Assy (50,000 Btu)
2: Burner Mounting Bracket
3: Igniter
4: Pressure Relief Valve (PRV)
5: Modulating Valve Assembly
6: Gas Valve
7: Gas Line – Burner
8: Relay 90271
9: Water Inlet Tube
10: Gas Inlet Tube
11 :Ignition Control
12: Flue Outlet Screen
13: Flue Tube
14: Pressure Switch
15: Blower Assembly
16: Fan Base
17: Flue Hood Assembly
18: Case Assembly
19: Heat Exchanger
20: ECO
21: Low Temperature Switch
22: Orifice #72 (45,000 Btu
23: Orifice #71 (50,000 Btu
24: Orifice 0.27 (55K for PT#3392)
25: Pressure Elbow Assy