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Old 11-29-2011, 07:56 PM   #16
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New humidifier install


Indeed... either way he'll have a good result. And I agree with your sig. That explains a lot, too.

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Old 11-30-2011, 09:26 AM   #17
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Thanks for the spirited discussion, guys... :D

I'm probably going to order a 600 at this point and see where that puts me.
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Old 11-30-2011, 09:34 AM   #18
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Thanks for allowing us to help you, I hope that you were not led astray by any misguided information.The 600 will serve you well, remember to change the evaporator pad every fall, and keep the in line strainer and nozzle clean.Also its a minute amount of air, but remember to close the by-pass in the summer during A/C operation.Most important of all is to mount the humidistat in the return duct at least 1 ft above the humidifier.
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Old 11-30-2011, 10:16 AM   #19
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Nope- I was looking for some good input, and the discussion helped, because they are all questions that I would have probably asked anyhow in trying to figure out the purchase.

I'll let you know how I'm doing, and I'm sure there will be a question or 2 that pop up during install... Always are...
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Old 11-30-2011, 01:24 PM   #20
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I'm ordering, and unsure if I also need the #50 current sensing relay- any way to tell from here if I need it? Not sure if it's as simple as a "furnaces built after xxxx will have the necessary hookups" or not...
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Old 11-30-2011, 01:51 PM   #21
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no, we will use the transformer that comes with the humidifier
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Old 11-30-2011, 03:41 PM   #22
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Thanks harleyrider!
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Old 11-30-2011, 05:04 PM   #23
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FWIW I measured the current draw on a Aprilaire solenoid switch at about 170 mA. Not sure why you would use a separate transformer just for the humidifier, unless your current system doesn't have one!
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Old 11-30-2011, 05:20 PM   #24
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FWIW I measured the current draw on a Aprilaire solenoid switch at about 170 mA. Not sure why you would use a separate transformer just for the humidifier, unless your current system doesn't have one!
Because it's included with the unit and thats how they intend it to be powered, If your furnace has a 24 vac humidifier terminal Then thats a good option B.
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Old 12-01-2011, 11:03 AM   #25
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Because it's included with the unit and thats how they intend it to be powered, If your furnace has a 24 vac humidifier terminal Then thats a good option B.
Yup, it can be done either way. Many thermostats can supply 24v for a humdifier, using power from the furnace or AH transformer. 170mA on top of whatever else it is powering isn't much.
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Old 12-01-2011, 12:44 PM   #26
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I'll have to take a peek and see what this thing has on it... Thanks!
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Old 12-04-2011, 12:41 PM   #27
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I've been following Joe Dirt's thread because he asked the same question I was going to right before I did, and everyone's responses have been great. I went with the Aprilaire 600 also, but during the install, I noticed something I thought was odd. There is already an 8" duct connecting my supply plenum to the return plenum with a damper in it (on the supply side) about 3/4 closed. While I'm no HVAC expert, I don't ever recall seeing a return and supply connected like that, except in the case of a bypass humidifier.

My current system did have a Herrmidifier 707 installed, but by the looks of it, that thing has not worked in years. Although, I did find it odd that it was installed on the return plenum, and the discharge is almost directly across from the above-referenced duct (my recollection is that most of those were installed on the supply side). Is it possible that someone was effectively trying to create a bypass system before such a thing really existed? Of course, that does not make a lot of sense to me as I assume the mist would be heavy and being discharged into the cold air return would not readily "bypass" the furnace and go through the mystery duct and into the supply plenum, but maybe there are some physics that would make it work.

Regardless, unless someone tells me there is a real reason for that mystery connection between the return and supply to be there, I am going to either use the old cutouts for the new Aprilaire with a 6" reducer on the supply plenum and mounting the evaporator portion on the return side by overlaying the template on top of the existing 8" hole).

If there is a good reason for it to be there please let me know, and I will just leave it alone and install the unit and connect on the plenums opposite of the mystery duct is. If that duct does have a purpose and should be left alone, any thoughts on why the damper (which is not adjustable from the outside any longer because it was sealed in place with mastic by PO) is set 3/4 open, and is that right, or should I reach through and open or close it further while I have the hole open on the other side?

I hope that made some sense, and I hope Joe Dirt's running into fewer mysteries than I am while doing this today. Apologies in advance if this is one of those really obvious things everyone should know.

Thanks!
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Old 12-04-2011, 12:51 PM   #28
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Originally Posted by ctcole View Post
I've been following Joe Dirt's thread because he asked the same question I was going to right before I did, and everyone's responses have been great. I went with the Aprilaire 600 also, but during the install, I noticed something I thought was odd. There is already an 8" duct connecting my supply plenum to the return plenum with a damper in it (on the supply side) about 3/4 closed. While I'm no HVAC expert, I don't ever recall seeing a return and supply connected like that, except in the case of a bypass humidifier.

My current system did have a Herrmidifier 707 installed, but by the looks of it, that thing has not worked in years. Although, I did find it odd that it was installed on the return plenum, and the discharge is almost directly across from the above-referenced duct (my recollection is that most of those were installed on the supply side). Is it possible that someone was effectively trying to create a bypass system before such a thing really existed? Of course, that does not make a lot of sense to me as I assume the mist would be heavy and being discharged into the cold air return would not readily "bypass" the furnace and go through the mystery duct and into the supply plenum, but maybe there are some physics that would make it work.

Regardless, unless someone tells me there is a real reason for that mystery connection between the return and supply to be there, I am going to either use the old cutouts for the new Aprilaire with a 6" reducer on the supply plenum and mounting the evaporator portion on the return side by overlaying the template on top of the existing 8" hole).

If there is a good reason for it to be there please let me know, and I will just leave it alone and install the unit and connect on the plenums opposite of the mystery duct is. If that duct does have a purpose and should be left alone, any thoughts on why the damper (which is not adjustable from the outside any longer because it was sealed in place with mastic by PO) is set 3/4 open, and is that right, or should I reach through and open or close it further while I have the hole open on the other side?

I hope that made some sense, and I hope Joe Dirt's running into fewer mysteries than I am while doing this today. Apologies in advance if this is one of those really obvious things everyone should know.

Thanks!
Here is a humidifier that I just installed the other day.....

http://api.viglink.com/api/click?for...13230245524992



and the thread that goes with the pictures
New humidifier install

Last edited by harleyrider; 12-04-2011 at 12:53 PM.
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Old 12-04-2011, 09:15 PM   #29
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I haven't run into any difficulties yet-



-because my humidifier hasn't arrived in the mail yet. :D

Now I'm following your convo, ctcole!


harleyrider- your link above links to this thread... But that is an interesting buck!
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Old 12-05-2011, 07:33 AM   #30
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Originally Posted by Joe Dirt View Post
I haven't run into any difficulties yet-



-because my humidifier hasn't arrived in the mail yet. :D

Now I'm following your convo, ctcole!


harleyrider- your link above links to this thread... But that is an interesting buck!
got him 2 years ago.....quite a story behind that picture

try this link

HUMIDIFIER INSTALL 101 (for Joe Dirt)

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