Back Flow On Humidifier Bypass - HVAC - DIY Chatroom Home Improvement Forum

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Old 01-27-2011, 05:46 PM   #1
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Back flow on Humidifier Bypass

I have installed an Aprilaire 500A humidifier. Everything works but I noticed the bypass duct gets hot even on the side where it connects into the return duct. Which I think is caused by back flow. Is this normal? Did I install it incorrectly?

Also due to limitation I installed my controller down stream of the bypass. (2'-3') When I close the damper on the humidifier the humidity level drops quickly and when I reopen it it goes back up.

Any incite would be appreciated.
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