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If the burner is in the
below state:
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Valve−on Delay, Trial for
Ignition, Ignition Carryover
Run (igniter is shut off)
Pump Prime
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Yellow
Heating Sequence − Actions & Responses
1. Action: Thermostat calls for heat (W terminal is en-
ergized)
Response:
Primary control is energized.
D
After 15−second prepurge, power is sent to the oil
D
delay valve, ignition occurs and flame is
established.
Igition sequence continues for 10 seconds after
D
flame is sensed. Oil will continue to flow as long as
cad cell senses flame.
Heat fan on timing (1 to 30 seconds) begins. When
D
timing is complete, the indoor blower is at heat
speed and warm air is delivered to the controlled
space.
2. Action: Thermostat ends call for heat (W terminal is
de−energized)
Response:
After the thermostat is satisfied, the thermostat
D
circuit opens. The oil delay valve and burner are
de−energized.
Burner is de−energized.
D
Heat fan off timing (60 to 120 seconds) begins.
D
When timing is complete, indoor blower is de−en-
ergized.
D
Blower control returns to standby mode (oil prima-
ry control and indoor blower are off).
3. Action: Burner fails to light
Response:
Oil primary control enters soft lockout after ignition
D
failure (15 seconds without flame being sensed).
Push reset button on primary control for one sec-
ond to reset soft lockout.
Reset Button Operation
Button Click
(press < 1 second)
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Go to pump prime (see
Priming the Pump" above)
No action
No action
No action
Status Light Function
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Flame Sensed during normal operation (Could be stray
light during standby)
Control is in pump prime mode or
Reset button currently held for 15+ seconds.
Table 8
Pushing the reset button will:
Button Hold
(press > 1 second)
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Disable the Burner:
Any time the burner is
running, press and hold
the reset button to disable
the burner. The burner will
remain off as long as the
button is held.
Exit Pump Prime mode and return to Standby
Table 9
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After soft lockout reset, oil primary control allows
D
second ignition attempt. Primary control enters
hard lockout after second ignition failure (15 sec-
onds without flame being sensed). Push reset but-
ton on primary control for 15 seconds until light on
control turns yellow to reset hard lockout.
Burner motor is de−energized.
D
4. Action: Established flame fails
Response:
Burner motor is de−energized and oil primary con-
D
trol goes into recycle mode.
If the fan off delay is longer than the recycle timing,
D
the indoor blower continues to run on heating
speed through the next trial for ignition.
5. Action: Limit Switch Opens
Response:
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Oil primary control de−energizes burner.
D
Indoor blower is energized immediately at cool
speed.
Oil primary control is de−energized.
D
Indoor blower runs as long as limit stays open.
D
6. Action: Limit Switch Closes
Response: If there is a heating demand, oil primary
control energizes and ignition sequence begins.
Troubleshooting
Burner failure or improper operation can result from a num-
ber of different causes. Often the cause can be pinpointed
by observing the different types of failure or by the process
of elimination. The following troubleshooting charts list
some failures, causes and a sequence of steps to isolate
the point of failure. Check the simplest and most obvious
items before progressing to other items.
Page 18
Button Hold
(press 15+ seconds)
Reset from Restricted
(Hard) Lockout
Enables pump priming
After the reset button has
been held for 15 seconds.
The button can then be
clicked during the next
ignition sequence to enter
pump prime mode.
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Recycle
N/A
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