SEQUENCE OF OPERATION FLOW CHART
Description of this flow chart can be found in the “SEQUENCE OF OPERATION” section found on page 23.
Switch power on | Ignition |
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Control Board |
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to unit. | opens Gas |
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| Valve. |
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Thermostat calls | Ignition Control |
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Board shuts off |
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for heat. | Silicon Nitride |
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| Ignitor after |
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| 3 seconds |
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Ignition Control | Ignition Control |
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Board performs | Board waits 3 more |
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diagnostic check on | seconds to |
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components | monitor Flame |
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| Sensor. |
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Ignition Control |
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Board sends power |
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to Exhaust Inducer |
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| Ignition Control |
| Did Main |
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| NO | Board shuts off Gas | |
| Burner Light? |
| Valve and allows the |
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| Exhaust Inducer to |
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| purge appliance for |
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| 20 seconds. |
Exhaust Inducer |
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engages Prover |
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Switch |
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| YES |
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| Ignition Control |
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Ignition Control | Board monitors |
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units until T’Stat |
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Board provides | is satisfied. |
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power to Silicon |
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Nitride Ignitor |
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Silicon Nitride |
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Ignitor |
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warms up for |
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20 seconds |
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| 25 |
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