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Old 11-04-2011, 01:46 PM   #1
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HVAC electric dampers

Just got my hands on some DAMPACT 45 Deg-B dampers and 24v power supply. No instructions/schematic. They can be powered to the open or closed position. I assume that regardless of position, when the damper gets there, the power supply continues and there is some internal mechanism which prevents the motor from burning out. In otherwords, there isn't some external relay needed to shut power off when the damper has opened or closed. You power it open ( or closed) and the power source continues to feed that position until it is switched to the other side to close ( or open) the damper, Correct? Just want to check before I burn something out. Thanks


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Old 11-04-2011, 09:07 PM   #2
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HVAC electric dampers

Yes power is supplied until the next open/close position change.

Most residential damper systems are spring open, power close. In case of a motor or controller failure you can still have ventilation


Last edited by Master of Cold; 11-04-2011 at 09:11 PM.
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