Watts AERCO Edge [ii] - Spark Cleaning; Ignition

Edge [ii] Controller Operation Manual
SECTION 7 – UNIT STATUS
OMM-139_E • 8/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 171 of 196
7.1.4 Spark Cleaning
1. The Spark Cleaning Timer begins, typically for 10 seconds.
Figure 7.1.4: Ignition Sequence - Screen 4, Spark Cleaning
2. The Valve Position Out and Blower Voltage continue from the Purging sequence.
3. The Spark Current (amps draw from spark across igniter) is displayed. If this value goes
outside the set threshold range (typically 0.1 to 0.4 A), the Spark Cleaning rectangle turns
red and Spark Current Fault is displayed.
4. Upon expiration of the Spark Current Timer, if the spark current remains within range, the
Spark Cleaning rectangle turns green and the system progresses to the Ignition trial.
7.1.5 Ignition
Figure 7.1.5: Ignition Sequence - Screen 5, Ignition
1. The screen now displays the following additional parameters:
a) Flame Strength – Remains 0 until the flame sensor(s) senses flame, then displays
the flame strength between 0-100%. A flame strengths less than 70% will lead to flame
loss.