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All installations and services must be performed by qualified service personnel.
XIII. APPENDIX D: SEQUENCE OF OPERATIONS
75
A. SEQUENCE OF OPERATIONS FOR THE HEATING SYSTEM
Mode of Operation
Start
Start trial for
ignition
Standby
(At any time the oil
valve is not energized)
On power interruption, system
shuts off, restarts when
power is restored.
Ignition electrodes spark.
Burner motor energized.
Thermostat calls for heat,
contacts close
Control System Action
Oil valve energized after
15 second time delay.
Flame must be detected
after 45 seconds.
The retry sequence provides a
60 second wait before ignition
is attempted again.
If flame is not detected, the
oil valve is de-energized,
the ignitor is turned off and
the ignition control module
goes into the "retry" sequence.
Continous safe operation check. If
flame simulation condition present,
system shuts off oil valve,ignitor,
and burner motor; activates fast
flashing LED.
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