Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
30
CONFI DENTIAL
10-18. Ig niter
T-K3 Part # #704 Takagi Part # EKN74 Checkpoint B2
Function
Failure event
Effects on the T-K3
if the igniter fails
Error codes when
Igniter fails.
D iagnostic
Color/Number of
wires
1. Vi sual inspe ction: connection/b reakage of wi res and/or an obse rved weak
spark.
2. Check voltages: pr oper range of values sho wn below.
Purple(7)-Purple(7) 90 VAC-110 VAC
-To ignite the gas/air mixtures when the T-K3 is ready to burn gas on its burner
sur face.
-The output voltage of the igniter is more than 14kV.
1. Unabl e to ignite durin g the ignition pr ocess.
2. Makes attempts to ignite at all times.
1. The T-K 3 cannot ignite dur ing the ignition process an d the "111" o r "121" er ror
codes will display.
2. No effects on the T- K3, howeve r, the d urability of the ignite r wears down.
111 121
1-3/4" (44mm)
3/4" (20mm)
1-1/2" (38mm)
Igniter
High-voltage igniter cable
Power su pply
AC 90 to 110V
To High va ltage
ignite ca ble
AC 90 to 110V
DC 14kV

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