Features And Components - A.O. Smith 100 Series Installation And Operating Manual

1. Termination Elbow With Vent Screen
2. *Vent Pipe
3. *Vent Pipe Elbow (Long Radius)
4. *Inlet Water Shut-Off Valve
5. *Thermal Expansion Tank
6. *Union (Di-Electric Water Connection)
7. Cold-Water Inlet Nipple/Diptube
8. T&P Valve
9. Discharge Pipe
10. Control Cover (Plastic)
11. Condensate Drain (1/2" MNPT)
12. Condensate Trap/Exhaust Elbow
13. Drain Valve
14. *Floor Drain
15. Leak Detection Module (Optional)
* Items not supplied with the water heater.
** The side recirculation loop connections may not be used as the primary water inlet and outlet connections. See Combo Heating (page 32).
Venting as shown for PDV (Power Direct Vent) applications.
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30
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Figure 1. Features and Components - Front

FEATURES AND COMPONENTS

FEATURES AND COMPONENTS
16. *Metal Drain Pan
17. *Ground Joint Union (Gas Connection)
18. *Sediment Trap
19. *Main Manual Gas Shut-Off Valve
20. *Gas Supply*
21. Intake Air Pressure Switch (IAPS)
22. Hot-Water Outlet Nipple/Anode
23. Anode (Under Cap)
24. **Combo Heating System Supply Outlet
(Optional)
25. Control Panel
26. Outlet Air Pressure Switch (OAPS)
27. Blower
28. Gas Control Valve
29. **Combo Heating System Return Inlet
(Optional)
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Figure 2. Features and Components - Right Side
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30. Temperature Sensor
31. Burner Insulation Shield
32. Burner Refractory
33. Burner
34. Burner Gasket
35. Flange Gasket
36. Ignition Gasket
37. Flame Sensor
38. Hot Surface Igniter
39. Venturi
40. Blower Gasket
41. Blower/Burner Flange
42. Air Intake Adapter (Rubber)
43. Air Intake Terminal (Included in Vent Kit)
44. 2" Dia x 3.00" Long Air Intake Pipe (Supplied
with Vent Kit)
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