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Intermittent flame failure occurs during
a “call for heat”
If the oil primary control stops sensing a flame after the flame has been proven and the trial for ignition timer has expired,
the oil primary control enters a limited recycle mode where it will de-energize the burner for one minute, while the LED
light will flash for 2 seconds on, and 2 seconds off. After one minute the oil primary control resumes the call for heat, and
enters
another “trial for ignition” period. If a flame is proven during the trial for ignition, and lost after the trial for ignition
timer expires the control will go into another recycle mode countdown. If no flame is proven during the trial for ignition
period the control will go into a lockout condition. If the control tries three recycle modes where flame is proven, and then
subsequently lost the control will go into a hard lockout condition de-energizing the burner. If normal ignition does not
occur see
GENERAL TROUBLESHOOTING GUIDE
on page 7.
SEQUENCE OF OPERATION: BURNER WITH R7284P CONTROL
BURNER OPERATION
On every call for heat the oil primary control performs an internal safety check which takes five seconds to complete.
During these five seconds, the oil p
rimary control verifies that the cad cell is outputting a “no flame” resistance value. After
the check, the oil primary control will simultaneously energize the burner blower motor, solenoid valve (if equipped), and
ignition device. The oil primary control will then enter the 15 second trial for ignition period; once flame is established the
oil primary control will continue to monitor the flame by using the cad cell, and it will de-energize the ignitor after 10
seconds. The oil primary control allows burner operation to continue until the thermostat control
’s “call for heat” is
satisfied. Once the thermostat is satisfied the burner will be de-energized. If flame is not detected during the trial for
ignition, the oil primary control will go into a “lock-out” condition. If this occurs, proceed to the section titled SAFETY
LOCK-OUT TIME.
SAFETY LOCK-OUT TIME
Ignition fai
lure occurs during the first “trial for ignition” period
The cad cell monitors the combustion chamber for flame during the burner’s trial for ignition period. If no flame is detected
the oil primary control will go into a lockout condition. When the control goes into lockout it will de-energize the burner,
and the control’s screen will display “lockout mode”. Before attempting to start the burner again the control must be reset.
Press and hold the “i” button for three seconds to reset the control. If normal ignition does not occur see
GENERAL
TROUBLESHOOTING GUIDE
on page 7.
Intermittent f
lame failure occurs during a “call for heat”
If the oil primary control stops sensing a flame after the flame has been proven and the trial for ignition timer has expired,
the oil primary control enters a limited recycle mode where it will de-energize the burner for one minute while displaying
“recycle” on the display screen. After one minute the oil primary control resumes the call for heat, and enters another “trial
for ignition” period. If a flame is proven during the trial for ignition, and lost after the trial for ignition timer expires the oil
primary control will go into another recycle mode countdown. If no flame is proven during the trial for ignition period the oil
primary control will go into a lockout condition. If the oil primary control tries three recycle modes where flame is proven,
and then subsequently lost the control will go into a hard lockout condition de-energizing the burner. If normal ignition
does not occur see
GENERAL TROUBLESHOOTING GUIDE
on page 7.
Do not keep pressing the reset button and restarting the burner more than once with the burner not
lighting this could cause oil buildup in the firing chamber. This will cause smoking and possible detonation that could
damage the equipment if the burner does light.
