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HxxxFD(N/P)
2. Blower starts pre-purge cycle as the igniter heats up (20 Sec). 3. The Control checks for a closed Blower Vacuum Switch. 4. At proper Igniter temp a 4 second trial begins. Gas valve opens and monitors flame sense. The blower will turn off for one second. The Igniter is de-energized at flame sense or at completion of 4 sec trial. If
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