Sequence Of Operation: Burners With Wayne 12Vdc Oil Primary Control 101382-003; Sequence Of Operation: Burner With Drop-Out Timer - Wayne EHASR-DC Manual

SEQUENCE OF OPERATION: BURNERS WITH WAYNE 12Vdc OIL PRIMARY
BURNER OPERATION
On every call for heat the oil primary control performs an internal safety check; verifying the cad cell is not registering a
false flame signal. Completing a successful check, the burner's blower motor is energized, after 10 seconds the ignition
device is energized and in another 3 seconds the fuel solenoid is energized which begins the 15 second trial for ignition.
Once flame is established the oil primary control will monitor the presence of flame by using the cad cell's resistance
signal. The igniter is de-energized 15 seconds after a flame signal has been proven. Burner operation will continue until
voltage is removed from the white command wire on the oil primary control. When voltage is removed from the white
command wire the burner solenoid is de-energized and the motor will run a 2 minute post-purge cycle before de-
energizing. If voltage is re-applied to the white command wire during the motor 2 minute post-purge the control will restart
the sequence of operations as described before. If the presence of 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 failure occurs during the first "trial for ignition" period
The cad cell monitors the combustion chamber for a presence of flame during the burner's trial for ignition period. If the
presence of a flame is not detected the oil primary control will go into a lockout condition. When the oil primary control
goes into lockout it will de-energize the burner, and the control's red LED light on the bottom of the control will flash for 2
seconds followed by five short 0.5 second flashes. The red LED will repeat this sequence until the control is reset.
Remove power from the white command wire for 2 seconds to reset the control. If normal ignition does not occur see
GENERAL TROUBLESHOOTING GUIDE on page 7.
Repeated re-start attempts of a non-lighting burner could lead to the buildup of un-burned fuel in
the combustion chamber. This may cause smoking and possible detonation that will damage the equipment if the
burner does light.
Intermittent flame failure occurs during a "call for heat"
If the oil primary control stops sensing the presence of a flame after the signal has been proven and the trial for ignition
timer has expired, the oil primary control will re-energize the ignition device. The oil primary control then enters another
"trial for ignition" period. If flame signal is proven during the trial for ignition, and lost after the trial for ignition timer expires
the control will go into another "trial for ignition" period. If no flame is proven during the trial for ignition period the control
will go into a lockout condition. If normal ignition does not occur see GENERAL TROUBLESHOOTING GUIDE on page 7.

SEQUENCE OF OPERATION: BURNER WITH DROP-OUT TIMER

BURNER OPERATION
When the burner is built with a drop-out timer according to Figure 4 and voltage is applied across the red and black wire
leads the burner blower motor will be energized. When voltage is applied to the white wire lead the ignition device and fuel
solenoid will be energized. If the presence of a flame is proven, the drop-out timer is triggered to start a 3 second count-
down to de-energize the ignition device. If the drop-out timer does not receive a good flame signal it will not de-energize
the ignition device. If it loses the flame signal while the ignition device is de-energized it will re-energize the igniter. If any
problems arise during ignition or continued operation of the burner see the GENERAL TROUBLESHOOTING GUIDE on
page 7.
CONTROL 101382-003
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