OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 59 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 6: SAFETY DEVICE TESTING
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 4 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.
6.8 Air Flow Fault Tests-Blower Proof & Blocked Inlet Switches
These tests check the operation of the
Blower Proof
switch
and Blocked Inlet
switch.
6.8.1 Blower Proof Switch Test
Figure 6-7: Blower Proof & Blocked Inlet Switch Locations
1.
Set the Controller’s
Enable/Disable
switch to
Disable
.
2. Remove the front panels to gain access to the Blower Proof Switch, shown above.
3. Use a Phillips head screw drive to remove the front cover from the switch to reveal the
switch setting indicator dial (0.6 in the figure below) .
