Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
19
CONFI DENTIAL
10-7. Heat exchanger
T-K3 Part # #401 Takagi Part # EKK1X Checkpoint N/A
Function
Failure event
Effects on the T-K3
i f the heat
exch an ge r fails .
Error codes when the
heat exchanger fails.
D iagnostic
Color/Number of wires N/A
1. Visua l inspecti on: soot deposits, cr ack s on the heat exchanger walls, and/or
water leakage from the heat exchanger.
2. In the eve nt of abnormal sounds d ur ing com bustion:
A. Inspect for soot buildup inside the heat exchanger.
B. Ins pect for scale buildup i nside the heat exchanger pipes. Scal e build up
obstructs proper heat transfer to the water, thereby overheating the heat
exchanger and causing damage.
Absorb heat from combustion and transfer it to water through the heat
exchanger pipes.
1. Clogged heat exchanger fins and/or cracks on the heat exchanger walls.
2. Leaking exhaust gas.
3. Improper heat transfer can cause the water in heat exchanger to boil.
1. Water leakage from the heat exchanger
2. Exhaust gas leakage (if this occurs, an overheat cutoff fuse is in place to
detect this event and immediately stop the T-K3 from operating)
3. Abnormal sounds during combustion
N/A
14-1/4" (361.3mm)
11-3/4" (297.2mm)
20-5/8" (522.5mm)
Heat exchange r
Water pipes
Exhaust chamber

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