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Old 02-23-2014, 01:00 PM   #1
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Honeywell MARD Dampers


Hi all,

I am hoping you can give me some input on how Honeywell MARD Damper works.
I understand that it is powered on opening and closing.

But, when it is at closed/opened position, does the motor keep running to keep it close/open, or once it reached the closed position, the motor turns off locking the damper on that state?

I installed a couple of them, and I notice that the motor keeps running when it reached maximum open position.

Thanks!

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Old 02-23-2014, 01:39 PM   #2
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Honeywell MARD Dampers


It stays energized the entire time its open or closed.

Usually its used as a modulating bypass damper. Its a bit expensive as a bypass damper on an open or closed zone damper system.

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Old 02-23-2014, 02:07 PM   #3
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Honeywell MARD Dampers


I notice the motor keeps spinning after it reached open/close state. Will it be burnt out if it stays like that for along time?
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Old 02-23-2014, 02:17 PM   #4
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Honeywell MARD Dampers


It shouldn't.
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Old 02-23-2014, 02:27 PM   #5
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Honeywell MARD Dampers


OK, thanks!

I am worry because it feels warm after 1 hr of spinning.
Based on your explanation that it stays energized the entire time, it probably is normal to produce some heat and it probably has been designed to do so.
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Old 02-23-2014, 02:56 PM   #6
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Honeywell MARD Dampers


Yeah, at 100% modulation it would be opened and energized the entire time. So they are made to take the heat.

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