Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 6: SAFETY DEVICE TESTING
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 60 of 131
6.7 FLAME FAULT TEST
Flame faults can occur during ignition or while the unit is already running. To simulate each of
these fault conditions, proceed as follows:
1.
Set the Controller’s
Enable/Disable
switch to
Disable
.
2. Go to
Main Menu
→
Diagnostics
→
Manual Run
and enable
Manual Mode
.
3. Set the valve position
between 25% and 30%
using the
+
(Plus) and
–
(Minus) controls.
4.
Close the gas train’s Manual Shutoff valve located between the Safety Shut-Off Valve
(SSOV) and the Air/Fuel Valve, as shown on Figure 6.3, above.
5. It may be necessary to jump out the High Gas Pressure switch.
6.
Set the Controller’s
Enable/Disable
switch to
Enable
to start the unit.
7. The unit should purge and light the Pilot flame and then shut down after reaching the
main Burner Ignition cycle and display
Flame Loss During Ign
.
8. Open the Manual Shutoff valve closed in step 5 and press the
CLEAR
soft key.
9. Restart the unit and allow it to prove flame.
10. Once flame is proven, close the Manual Shutoff valve located between the SSOV and
the Air/Fuel Valve (see Figure 6-4, above).
11. The unit should shut down and execute an IGNITION RETRY cycle:
•
The unit executes a 15-second shutdown purge cycle and display
Wait Fault Purge
.
•
The unit executes a 30 second re-ignition delay and displays
Wait Retry Pause
.
•
The unit executes a standard ignition sequence and displays
Wait Ignition Retry
.
•
Since the Manual Shutoff valve is still closed, the unit will fail the ignition retry; it will
shut down and display
Flame Loss During Ign
following IGNITION RETRY cycle.
12. Open the manual gas valve closed in step 11.
13. Press the
CLEAR
button. The unit should restart and fire.
