58 Page
Item # Description
Part #
110U, 310U and
510U models
AT-KJr3U-IN/OS,
AT-K5U-IN/OS and
AT-D3U-IN/OS
118
119
Burner gasket
Burner holder gasket
319143-568
319143-569
120
121
122
Surge box plate
PCB fixing plate
Thermostat
319143-176
N/A
319143-185
130
131
LP Conversion kit
Manifold gasket
100270585
319143-581
150
151
152
153
154
O-ring P18 NBR (Manifold)
O-ring P20 NBR (Black)
Silicon ring for Outdoor models
Rain protection plate in Exhaust chamber for Outdoor models
Exhaust port for Outdoor models
N/A
319143-057
319143-206
319143-216
319143-219
401 Heat exchanger assembly for 110U and 310U Indoor
for 110U and 310U Outdoor
for 510U Indoor (AT-D3U-IN)
for 510U Outdoor (AT-D3U-OS)
100270557
100270558
100270559
100270560
402
403
404
405
406
Flow adjustment valve / Flow sensor
Bypass valve for 510U (AT-D3U-IN/OS) model
Water inlet
Inlet drain plug
Inlet water filter
319143-463
319143-464
319143-193
319143-197
319143-198
407
Inlet thermistor for 510U (AT-D3U-IN/OS)
319143-214
319143-572
408
Outlet thermistor for 510U (AT-D3U-IN/OS)
319143-529
319143-573
409
410
411
Water outlet
Outlet drain plug
Heat exchanger thermistor for 510U (AT-D3U-IN/OS) model
319143-466
319143-079
319143-574
412
Hi-Limit switch for 510U (AT-D3U-IN/OS) model
319143-228
319143-095
EM212
413
414
415
416
417
Overheat-cut-off fuse for heat exchanger
Pipe heater
Inlet heater
Pipe inlet
319143-067
319143-531
319143-468
100270581
319143-576
EX02A
450
451
452
453
Fuse fixing plate 40
Heater fixing plate 16
Fuse fixing plate 18
Pipe heater fixing plate
N/A
319143-125
N/A
N/A
454
455
456
457
319143-082
319143-080
319143-100
319143-091
EZM04
EZM06
EZM14
EZM15
458
459
460
461
Fastener “4-11” for 510U (AT-D3U-IN/OS) model
Fastener “14-22”
Fastener “16A”
319143-083
319143-097
319143-105
319143-226
EZM16
EM192
462
463
Fastener “16-25A”
Silicon ring for Indoor models
319143-205
319143-065
Parts List
Owner's Guide