A.O. Smith T-D2-OS Service Manual page 9

No. Description
15 Flow sensor
16 Heat exchanger assembly
17 Gas inlet
18 Heater
19 Flow adjustment valve
20 Surge box
21 Outlet drain plug
Air-fuel ratio rod
22
(AFR rod)
23 Flame rod
24 Igniter rod
Inlet drain plug (water
25
filter)
120 VAC Power ON-OFF
26
switch
27 Gas valve assembly
28 Manifold port
29 Gas inlet port
30 Exhaust chamber
31
Output thermistor
32
Bypass valve
Items# in
components
diagram
402
TU002 (T-D2-IN)
401
EK437 (T-D2-OS)
118
414
402
703
410
108
108
109
405
706
EKH6T (LP model)
Included in #102
EKK5K (NA model)
N/A
N/A
TU002 (T-D2-IN)
Included in #401
EK437 (T-D2-OS)
411
403
9
T-D2-IN / T-D2-OS Service Manual
Takagi
Part #
EK438
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK1E T-KJr2-IN/OS, T-K4-IN/OS,
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK2R
T-KJr2-IN/OS, T-K4-IN/OS
EK438
EK428 T-KJr2-IN/OS, T-K4-IN/OS
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK2E
T-KJr2-IN/OS, T-K4-IN/OS,
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK0E
T-H2-DV/OS, T-M50, T-M32
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK0E
T-H2-DV/OS, T-M50, T-M32
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK0F
T-H2-DV/OS, T-M50, T-M32
T-K3, T-K3-Pro, T-K3-SP/OS,
EKK2B
T-KJr2-IN/OS, T-K4-IN/OS
T-K3-SP/OS, T-KJr2-IN/OS,
EKK4V
T-K4-IN/OS, T-H2-DV/OS
N/A
N/A
EKK2T
EKK0U
CONFIDENTIAL
Ver. 1.00
Common parts
for other models
T-H2-DV/OS
T-M50
T-H2-DV/OS
T-H2-DV/OS