A.O. Smith Water Heater 520 Direct Vent Indoor Service Manual page 95

Item # Part #
426 319143-089 Pipe heater 120
427 319143-090 Pan screw M4×6 (W/Washer)
428 319143-091 O-ring P15 FKM
429 319143-092 Flow sensor
430 319143-093 Hot pipe
431 319143-094 Joint elbow
432 319143-095 Hi-limit switch
433 319143-096 Output thermistor
434 319143-097 Fastener "4-11"
435 319143-098 Water outlet
436 319143-099 O-ring JASO# 1017 FKM
437 319143-100 O-ring P14 FKM
438 319143-101 Drain tube
440 319143-102
441 319143-103
442 319143-104 Hi-limit switch for exhaust
443 319143-105 Fastener "14-22"
444 319143-106 Thermistor fixing plate
445 319143-107 Secondary heat exchanger plate
446 319143-108 Secondary heat exchanger
447 319143-109 Drain pipe
448 319143-110 Secondary heat exchanger inlet pipe
449 319143-111 Exhaust thermistor gasket
450 319143-112 Fastener "6-15"
451 319143-113 Band B
452 319143-114 Header
453 319143-115 Flat heater
454 319143-116 3 array heater
455 319143-117 O-ring P12 FKM
Description
Secondary heat exchanger plate
gasket A
Secondary heat exchanger plate
gasket B
520 Indoor / 520 Outdoor Service Manual
Common parts for other models
910, 710
510, 910, 710
510, 910, 710
510, 910, 710
710
110, 310, 510
95
CONFIDENTIAL
Ver. 1.00