A.O. Smith Water Heater 520 Direct Vent Indoor Service Manual page 96

Item # Part #
456 319143-118 Heat exchanger assembly (Out)
457 319143-119 O-ring P3 FKM
458 319143-120 Secondary heat exchanger drain plug
459 319143-121 Exhaust port
460 319143-122 Exhaust chamber assembly
461 319143-123 Secondary heat exchanger plate
462 319143-124 Heater fixing plate 20
463 319143-125 Heater fixing plate 16
701 319143-126 520 Indoor & Outdoor PCB
702 319143-127 Transformer
703 319143-128 Junction box inner plate
704 319143-129 Freeze protection and EH-IG wire (IN)
705 319143-130 Gas valve wire
706 319143-131 Exhaust thermistor assembly
707 319143-132 Thermistors wire
708 319143-133 Proportional gas valve wire
709 319143-134 Pump and multi-cable
710 319143-135 Flame rod wire
711 319143-136 Switch wire
712 319143-137 PCB fixing plate
713 319143-138 AC120V wire
714 319143-139 AC120V Transformer connecting wire
715 319143-140 Surge box
716 319143-141 AC120V power ON-OFF switch
717 319143-142 PCB cover
718 319143-143 Nylon clamp
719 319143-144
720 319143-145 Exhaust fan motor wire
721 319143-415 Exhaust thermistor wire
Description
Freeze protection and EH-IG wire
(Out)
520 Indoor / 520 Outdoor Service Manual
Common parts for other models
910
110, 310, 510, 910, 710
910
110, 310, 510
510
310, 510
110, 310, 510
110, 310, 510, 710
96
CONFIDENTIAL
Ver. 1.00