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Table 8: LIST OF MAIN COMPONENT IN THE INTERIOR VIEW
No.
1.
Case assembly
2.
Exhaust duct
3.
Pressure sensor
4.
Air damper assembly
5.
Flame Sensor
6.
Primary heat
7.
assembly
8.
Secondary heat
9.
Main Gas Valve
10.
Gas valve assembly
11.
120 VAC Power ON-OFF switch
12.
Computer board
13.
14.
Condensate drain port
15.
120 VAC wire
16.
Gas inlet port (Gas inlet)
17.
Gas inlet
18.
X3™ manifold assembly
19.
X3™
20.
Inlet
21.
Water inlet
22.
Water outlet (with PRV)
23.
Return water inlet
24.
Drain port
25.
Return thermistor
26.
Inlet heater
27.
28.
Inlet thermistor
29.
Built-in controller
30.
Heat
31.
Hi-limit switch
32.
33.
Overheat-cut-
34.
chamber assembly
35.
Rain
36.
Fan motor
37.
Gas solenoid valve assembly
38.
Air inlet tube
39.
Exhaust thermistor
40.
Exhaust port cap (Outlet
41.
Flow adjustment valve/Flow sensor
42.
Bypass valve
On-Demand Water Heater Service Handbook for X3P Models
Item #
diagram
0
1 0
4
1 3
123
1
2 2
1
8 0
assembly
4
1 0
7
0 1
assembly
4
8 1
1
2 0
1
2 0
7
6 0
7
1 0
7
3 0
box
0
9 0
7
4 0
(118)
1
8 1
4
9 8
7
9 3
4
5 0
4
4 0
4
9 0
4
4 0
469
731
4
7 1
pump
726
407
7
2 2
thermistor
411
4
2 1
rod
109
fuse
4
3 1
112
tray
0
7 0
103
1
0 3
1
4 2
718
port)
434
4
2 0
4
3 0
•
41
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