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Armstrong International A8581 Humidistat 30067439 890 This comprehensive hot surface igniter This comprehensive hot surface igniter (HSI) kit serves as a direct upgrade for the discontinued 511 330 145 and is essential for maintaining the 200 ohm resistance parameters required by United Technologies 1013 200 control boards these applications often require a dual dial selector (like the TD294) for "spray" and "dry" cycles
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