Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 9: O2 TRIM OPERATION
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 96 of 131
9.3 O2 SENSOR CALIBRATION
O
2
sensor calibration can be initiated by
pressing the Calibrate button on the Edge’s
O2 Sensor
screen
(
Main Menu
→
Calibration
→
Input/Output
→
O2 Sensor
). Connect the combustion
analyzer to the exhaust to perform the O
2
sensor calibration. Once the calibration starts, the
Edge ignites the unit and waits 2 minutes for the sensor to settle. Enter the O
2
reading from the
analyzer to complete the calibration process.
Figure 9-3: O2 Sensor Calibration Screen
9.4 TRIM MENU VALUES AND DEFAULTS
There are three O2
Trim screens, available from
Main Menu
→
Advanced Setup
→
Performance
→
O2 Trim
.
•
O2 Trim Settings:
To enable O2
Trim, set the
O2 Trim
parameter to
Enabled
. You can
then adjust the
O2 Offset, Settle Time, O2 Trim Gain
and
O2 Trim Iteration Limit
parameters to values appropriate for the unit, per the table below.
Figure 9-4: O2 Trim Settings Screen
•
O2 Trim Parameters
: Choose a
Valve Position
and then set the
O
2
Target, Upper
and
Lower Limits
for the valve position. You can then repeat this for all other valve
positions, per the tables below.
