Summer Aprilaire Humidifier Shutdown

Monday, April 2, 2012 by Aprilaire Team

Annual summer shutdown for bypass models 400 series, 500 series and 600 series close the bypass damper, which is a part of the humidifier, with the small damper handle.

Humidifier Contol:

Digital Humidifier Control in Automatic Mode (See Figure A):

No adjustment is necessary.

 

Digital Humidifier Control in Manual Mode (See Figure B):

Set the knob to the "OFF" position.

Manual Humidifier Control (See Figure C):

Set the knob to the "OFF" position.

Comments for Summer Aprilaire Humidifier Shutdown

Friday, April 6, 2012 by Nicholas Pandolfo:
Thanks for this information. Now I know what to do during the summer months....
Tuesday, April 10, 2012 by Jay:
I Control Unit I have appears to be a manual model but doesn't match the photo in Figure-C. The "OFF" is located to the far right versus at the top as shown in Figure-C.
Could you tell me what Model Number that is ?
Also, why is performing this annual shutdown recommended ? I have never done this in the previous years.

Thank you
Saturday, April 14, 2012 by Miles Hoover:
I have a 700 model; any advice about shutting it down for the season?
Saturday, April 14, 2012 by James Koopman:
The e-mail you sent does not seem to correspond to the humidifier we have attached to our furnace. I do not see any controls on that. Just a summer winter knob.
Tuesday, April 17, 2012 by John Marsolais:
My question is the same as "Jay" on April 12, 2012. Can you kindly send me the same response you sent to Jay? Thanks so much.
Tuesday, April 17, 2012 by andy kelly:
Great reminder, things like this we forget.
Thanks, Andy
Thursday, April 19, 2012 by Megan:
Thank you for your inquiry regarding the summer shutdown of your Aprilaire humidifier. All Aprilaire humidifiers include a control which is either located on the cold air return duct or in the living area of the home. Below are a few of the controls we have offered since our humidifiers were introduced in 1953. The controls which have an off position should be placed in the off position. If it does not have an off position simply turn the dial to the lowest setting and follow the applicable steps below. The summer/winter knob you described is the bypass damper.

Annual summer shutdown for bypass models 400 series, 500 series and 600 series close the bypass damper, which is a part of the humidifier, with the small damper handle.
Digital Humidifier Control in Automatic Mode (See Figure A):
No adjustment is necessary.




Digital Humidifier Control in Manual Mode (See Figure B):
Set the knob to the "OFF" position.


Manual Humidifier Control (See Figure C):
Set the knob to the "OFF" position.



Older style manual control
Tuesday, April 24, 2012 by Yvonne:
I have been turning off the humidifier during the warm weather. However, the water continued to flow out of the drain pipe. Do I need to shut off the water as well? The problem is I forgot I did, and had to call a repair man when the water did not flow the following winter. Duh!
Sunday, May 6, 2012 by John Cuthrell:
Don't understand why you have to make this so confusing..Are you guys programmers ? ..I'm telling Daddy ....
Saturday, February 15, 2014 by Jim Johnson:
Which direction does the damper handle point to close for the summer? It is not obvious since you can't see what happens. I just had it installed in mid-February and they have it pointing to Summer and that seems counter-intuitive to me. There is no illustration anywhere.

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