Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
2
CONFI DENTIAL
Table of Co ntents
1. Specifications of the T-K3, T-K3-OS, and T-K3-SP……………..………………………… 3
2. Exterior view ……………………...…….…………………………………………………….. 4
3. Interior view …………………………….…………………………………………………….. 5
4. List of main components in the interior view …….………………………………………… 6
5. Schematic diagram………………………………………………………………………….. 7
6. Wiring diagram………………………………………………………………………………. 8
7. Wiring diagram checkpoints for diagnosis………………………..………………….….… 9
8. Resistance values of the temperature thermistors…………..…………………………… 10
9. Operational flow chart……………………………………………………………………… 11
10.
Component specifications………………...………………………………………………… 12
11.
Fault Analysis & Specifications……………………………………………………………... 32
12.
Controls and settings………………………………………………………………………… 40
13. Components diagrams……………………………………………………………….......... 65
14. Parts list……………………………………………………………………………………….. 68
15. Revisions……………………………………………………...…………………………….. 70

Takagi T-K3 Specifications

General

Type	Tankless
Installation Type	Indoor
Maximum BTU Input	199, 000 BTU/h
Gas Connection Size	3/4"
Vent Size	3"
Hot Water Flow Rate (at 35°C rise)	6.6 GPM
Maximum Input	199, 000 BTU/h