10-20. Igniter
Unit Part # #123 Takagi Part # EKN74 Checkpoint B2
Function
-To ignite the gas/air mixtures when the water heater is ready to burn gas on
its burner surface.
-The output voltage of the igniter is more than 14kV.
Failure events
1. Unable to ignite during the ignition process.
2. Makes attempts to ignite at all times.
Effects on the water
heater if the igniter fails
1. The water heater cannot ignite during the ignition process and the "111”
or “121” error codes will display.
2. No effects on the water heater, however, the durability of the igniter
wears down.
Error codes when Igniter
fails
111 121
Diagnostic
1. Visual inspection: connection/breakage of wires and/or an observed weak
spark.
2. Check voltages: proper range of values shown below.
Color/Number of wires Purple(7)-Purple(7) 90 VAC-110 VAC
High-voltage igniter cable
Igniter
14 kVDC
90 to 110VAC
Purple wire
Power supply
AC 90 to 110V
To High valtage
ignite cable
1-3/4" (44mm)
3/4" (20mm)1-1/2" (38mm)
The high-voltage igniter
cable and the purple wires
do not come with EKN74.
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