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A.O. Smith Water Heater Parts Fulfillment
125 Southeast Parkway, Franklin, TN 37068
1-800-433-2545 • www.hotwater.com
PRINTED IN U.S.A. 1006 PART NO. 212856-000
NATURAL GAS
TRAIN/BLOWER
ASSEMBLY
See pages 5-7
PROPANE GAS TRAIN ASSEMBLY
See pages 8-10
WATERWAYS &
COMBUSTION
CHAMBER
See page 2
BY-PASS
See pages 8-10
WIRING/HARNESS & PROBES
See page 12
JACKET/FRAME ASSEMBLY
See page 4
CONTROL BOARD
See page 11
WATER INLET
See page 3
EXHAUST & DRAIN
ASSEMBLY
See page 3
COMMERCIAL POWER BURNER BOILER
REPLACEMENT PARTS LIST
COPPER BOILERS FOR HYDRONIC
HEATING & HOT WATER SUPPLY
LEGEND MODELS LB/LW: 500, 750 & 1000
SERIES: 400 - 401