Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
28
CONFI DENTIAL
10-16. Tran sfo rmer
T-K3 Part # #702 Takagi Part # EKH09 Checkpoint A1, A2
Function
Failure event
Effects on the T-K3
if transformer fails
Error codes when
transformer.
D iagnostic
White -Black
Brown-Brown
-To tran sfor m input voltag e from 12 0VAC to 100VAC.
-Every electrical component of the T-K3 is designed to only work with a 100VAC
power supply, therefore, the T-K3 comes equipped with this transformer.
120VAC / less than 1Ω
N/A
Color/Number of
wires
1. Visual inspection: connection/breakage of wires and/or signs of electrical
dama ge .
2. Check voltages of the transformer: Proper range of values shown below.
100VAC / less than 1Ω
1. Ther e is no po wer coming fr om the transfor me r.
2. The vol tage fr om the power suppl y cannot be co nverted to 100VAC.
1. The T- K3 does not operate due to lack of power fr om transform er .
2. A failed transfor mer can cause e lectri cal dam age to other e lectr ical components
within the T-K3.
From the 120 VAC
power supply
To power the computer
board and heaters
(100VAC)
2-3/ 8" ( 61mm)
2-3/ 4" (7 0mm) 1-1/ 2" (3 7mm)
3 -3/4" (94m m)
5-7/ 8" (15 0mm)
5- 7/8" (150m m)

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