Aprilaire 700 Vibration

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Old 11-22-14, 07:56 PM
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Aprilaire 700 Vibration

Now that winter is coming to northeast Ohio my new Aprilaire 700 has started doing its job. It was professionally installed by the Carrier dealer who installed my new Infinity System in July of this year. I've noticed a vibration in the humidifier when it is running. There is no vibration when the 700 is not running so I assume that I'm dealing with an unbalanced fan shaft or blades. The Carrier dealer's work is of the highest quality and is not contributing to the vibration. Has anyone had this problem with a fan equipped humidifier? I believe that I should return it to Aprilaire for replacement.

Thank you in advance for your time and any assistance provided.
 
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Old 11-23-14, 10:52 AM
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It is very possible that the fan blades are bent.

New unit.... supplied by the HVAC company ? Have them replace it.

Aprilaire 4247 Fan Blade
 
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Old 11-23-14, 12:40 PM
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Thank you for the reply, PJ. I appreciate it very much. Actually, I purchased the Aprilaire 700 humidifier and an Aprilaire model 2210 filter system on Amazon. I was going to put them on my existing furnace, which along with the AC unit was installed in 1971 when the house was built. My AC unit essentially died so I decided to replace them both with a Carrier Infinity system. The Carrier dealer installed both Aprilaire units on my new system at no cost to me. I have nothing but good things to say about the dealer, his men and the quality of the installation.

I suppose I'll just send it to Aprilaire for repair or replacement, although I could easily replace the fan and/or motor myself. It's not really a vibration. It's more like what you feel when you use a drill bit that has a shank that is very slightly out of balance. I'm leaning toward an off balance or very slightly bent shaft as the cause of the problem and would prefer to send only the outside piece of the humidifier that contains the fan and motor so that I don't have a sizable hole in the return drop down that I'll have to cover.
 
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