State SBL85 390NE A - Manual (Page 13)

11 Servicing should only be performed by a Qualified Service Technician
SPARK IGNITER, FLAME SENSOR, SIGHT GLASS
The spark igniter and the flame sense rod are shown below. Also shown is the burner sight glass. These
features are typical for all models.
SPARK IGNITER / FLAME SENSOR / CONTROL TIMING
SPARK IGNITER
This water heater is equipped with a spark igniter. Do not damage the ceramic insulator. Inspect the igniter
ceramic insulator for any cracks. The spark gap between the spark rod and grounding rod is 1/8".
FLAME SENSOR
This water heater is equipped with a flame sensor. The flame sensor senses flame by passing a small
electric current through the flame. This type of flame sensing is also known as flame rectification. The
Ignition Control is looking for a minimum current of 0.7 micro amperes for the water heater to operate.
CONTROL TIMING
Pre-purge 30 seconds
Inter Purge 30 seconds
Trial for ignition 4 seconds
Tries 3
Flame Sensing Remote
Loss of Flame Recycle
Reset 15 minutes auto reset
Note: 5 seconds delay between low and high fire rate.
Burner
Sightglass
Spark Igniter
Flame Sensor