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Old 02-21-2011, 10:56 AM   #8
Rusty
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bigdog,

Glad to hear that you got your burner going.

When you have a power venting system for your exhaust fumes, this is how it works:

1. The thermostat calls for heat and energizes a relay which activates the power venter. After the venter motor has come up to speed, the pressure switch closes. This closes the circuit to the burner and allows the burner to fire.
2. After the heating requirement has been satisfied, the thermostat circuit will open and deactivate the burner.
3. The power venter operates for a period of time after the burner has shut off to purge remaining flue gases.


Any malfunction is these critical steps will make the home owner very unhappy on a cold and windy day or night.
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