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A.O. Smith
Water Heater
T-KJr2-OS
A.O. Smith T-KJr2-OS User Manual
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On-Demand
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110 Indoor
A.O.
Smith
W
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500 T
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Ashland City
, TN 37
015
T
oll Free: 1
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877
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73
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110 Ou
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2
Table of Contents
Table of Contents
2
Specifications
3
Exterior View
4
Interior View
6
List of Main Components in the Interior View
8
Schematic Diagram
10
Wiring Diagram
11
Wiring Diagram Checkpoints for Diagnosis
12
Resistance Values of the Temperature Thermistors
14
Operational Flow Chart
15
Component Specifications
16
Burners
17
Gas Manifold
18
Fan Motor
19
Gas Valve Assembly
20
Flame Rod
21
AFR Rod
22
Heat Exchanger
23
Flow Adjustment Valve
24
Flow Sensor
25
Thermistors
26
Hi-Limit Switch
27
Overheat Cutoff Fuse
28
Freeze Protection Heaters
29
Computer Board
30
Transformer
31
Igniter
32
Freeze Protection Thermostat
33
Surge Box
34
Fault Analysis & Specifications
35
12. Controls and Settings
44
Controls and Settings
44
Diagnosis Using the 9007666005
45
Verifying Functionality of Computer Board and
46
Display Patterns for Error Codes
47
Clearing the "10" and "99"Error Code
48
AFR Rod Function
49
Dipswitch Settings
50
A) ON/OFF Conditions: Overview
51
B) ON/OFF Conditions: BTU Requirements
52
High-Altitude Region Support Functions (FM+, FM++ and FM+++)
53
Adjusting Manifold Gas Pressure
54
Freeze Protection System
56
Draining the Unit and Cleaning the Inlet Water Filter
57
Components Diagrams
58
Parts List
61
Revisions
65
5
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A.O. Smith T-KJr2-OS Specifications
General
Brand
A.O. Smith
Model
T-KJr2-OS
Category
Water Heater
Language
English
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