Appendix D: Sequence Of Operations; Mode Of Operation - Thermo Pride OPA Installation And Service Manual

All installations and services must be performed by qualified service personnel.
XIII.
A. SEQUENCE OF OPERATIONS FOR THE HEATING SYSTEM

Mode of Operation

Standby
(At any time the oil
valve is not energized)
Start
Start trial for
ignition

APPENDIX D: SEQUENCE OF OPERATIONS

Control System Action
Continous safe operation check. If
flame simulation condition present,
system shuts off oil valve,ignitor,
and burner motor; activates fast
flashing LED.
Thermostat calls for heat,
contacts close
Ignition electrodes spark.
Burner motor energized.
Oil valve energized after
15 second time delay.
Flame must be detected
after 45 seconds.
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OPA 1 of 2
On power interruption, system
shuts off, restarts when
power is restored.
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.
The retry sequence provides a
60 second wait before ignition
is attempted again.