A.O. Smith Cyclone XL 100 Series, Руководство по обслуживанию

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SPARK IGNITER SPARK IGNITER
The water heaters covered in this Service Handbook use a Spark Igniter. The Spark Igniter has two rods: the sparking rod that has
ceramic insulation and the grounding rod. See
Figure 21
. During trial for ignition, the Control System powers a high voltage transformer
(Ignition Control) from J6, and the Ignition Control supplies high voltage to the sparking rod via the ignition cable. The high voltage
potential across the gap between the sparking rod and the grounding rod generate a spark.
Flame rod, ½” to
burner surface
Spark igniter,
0.125” spark gap,
~1/2” to burner
surface
Firere 21. Berner Assembly
The Control System is programmed to start sparking a few seconds before the Gas Control Valve opens. See the
Sequence of Operation
Flow Chart
(page 9).
Service Notes:
• The animated lighting bolt Status Icon is visible on the UIM. See
Figure 24
(page 40) .
• Ensure that the wiring and connections between the J6 Socket on the CCB and the Burner Adapter are not broken, pinched or
disconnected.
• Ensure that there is approximately 120 VAC at the J6 Socket on the CCB.
• It is a good practice to check for any crack or damage to the ceramic insulator. If any crack is found, replace the Spark Igniter. Do not
contaminate the ceramic insulator as this could make a short circuit between the spark rod and grounding rod. Ensure that there is a
good connection between the ignition cable and Spark Igniter.