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Seguence of operation for a direct ignition gas furnace?

Updated: 9/24/2023
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Lonzellgilliam3fb558...

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9y ago

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If the furnace is direct ignition, The HSI or spark ignites the flame. A flame sensor passes current through the flame, if current is present the main.

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9y ago
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Q: Seguence of operation for a direct ignition gas furnace?
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