Service Handbook - AO Smith Water Heaters

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Burner Assembly The Burner is a radial design burner with a steel fiber jacket on the outer surface and is part of a larger Burner Assembly. Figure 8 and Figure 9 below show side views of the complete Burner Assembly removed from the water heater with key components identified. See the exploded view of the Combustion Blower & Burner Assembly on page 9 also. BURNER ASSEMBLY RIGHT SIDE VIEW BURNER ADAPTER WIRING HARNESS IGNITER/FLAME SENSOR BURNER FLANGE & GASKET BURNER BLOWER FLANGE BURNER ADAPTER FLAME SENSOR Figure 8 BURNER ADAPTER WIRING HARNESS IGNITER/FLAME SENSOR BURNER ASSEMBLY LEFT SIDE VIEW BURNER FLANGE & GASKET BURNER BLOWER FLANGE BURNER ADAPTER IGNITER Figure 9 12 Servicing should only be performed by a Qualified <strong>Service</strong> Agent
BURNER ADAPTER WIRING HARNESS IGNITER/FLAME SENSOR BURNER GROUND WIRE BURNER ADAPTER BLOWER FLANGE WITH BLOWER DISCHARGE ORIFICE IN PLACE Figure 10 BURNER SIGHT GLASS BLOWER DISCHARGE ORIFICE BURNER ADAPTER WIRING HARNESS IGNITER/FLAME SENSOR BLOWER FLANGE WITH ORIFICE REMOVED Figure 11 BURNER ADAPTER WIRING HARNESS IGNITER/FLAME SENSOR BLOWER FLANGE BLOWER DISCHARGE ORIFICE WIRING HARNESS GROMMET BURNER ADAPTER Figure 12 Servicing should only be performed by a Qualified <strong>Service</strong> Agent 13
Page 1: Service Handbook Commercial / Resid
Page 4 and 5: This Service Manual covers the wate
Page 6 and 7: Venting This section of the Service
Page 8 and 9: Electrical Requirements The water h
Page 10 and 11: Front & Back Views Features And Com
Page 12 and 13: How It Works Operation and Service
Page 16 and 17: Combustion Blower and Burner Remova
Page 18 and 19: Burner Assembly Removal Figure 15 1
Page 20 and 21: Flame Sensor Ignition of the Burner
Page 22 and 23: Igniter The water heaters covered b
Page 24 and 25: Venturi A Venturi is mounted on the
Page 26 and 27: Gas Valve Removal The outlet of the
Page 28 and 29: Gas Pressure Test 1. If the water h
Page 30 and 31: Pressure Switches The water heaters
Page 32 and 33: Sensing Tubes The three pressure sw
Page 34 and 35: Continuity Test During Operation Th
Page 36 and 37: BLOWER PROVER SWITCH PRESSURE TEST
Page 38 and 39: Table 4 Celsius WATER TEMPERATURE F
Page 40 and 41: UIM Ribbon Cable Connection Service
Page 42 and 43: CCB Cover Removal And Replacement T
Page 44 and 45: CCB Connection Identification J1 So
Page 46 and 47: Wiring Diagram 24 VOLT GAS VALVE BL
Page 48 and 49: Commercial And Residential Models T
Page 50 and 51: Operating States The current operat
Page 52 and 53: Temperatures Menu Description/Actio
Page 54 and 55: Current Fault Description/Action Se
Page 56 and 57: Sequence Of Operation Read the Sequ
Page 58 and 59: Troubleshooting The Control System
Page 60 and 61: Fault Messages Displayed Message/Co
Page 62 and 63: Fault Messages Displayed Message/Co
Page 64 and 65:
Fault Messages Displayed Message/Co
Page 66 and 67:
Page 68 and 69:
Page 70:
NOTES
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Service Handbook - AO Smith Water Heaters

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