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A O Smith Water Heater 976 Series ManualCOMMERCIAL WATER HEATER PARTS LIST POWERED ANODE ASSEMBLY See Page 7 Model BTH-300A Model BTH-400A Series 976/977 OPERATING CONTROL WIRING See Page 3- 4 CYCLONE XHE - MODEL BTH-300A/400A See Page 2 BLOWER/BURNER ASSEMBLY See Page 5 GAS VALVE See Page 5 CONTROL PANEL See Page 3 EXHAUST ELBOW, VENT KIT & BLOWER INTAKE PARTS See Page 6 PRINTED IN U.S.A. 0606 1 PART NO. 197177-002 ... Brands:A | User Manual | ENGLISH | [View] | |||||||||