Aprilaire not working with my Goodman furnace


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Old 11-20-10, 10:25 PM
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Aprilaire not working with my Goodman furnace

Hey everyone. I just got an Aprilaire 700a and it is all installed and I hooked the wiring up per the instructions. However, the furnace works fine but the humidifier doesn't turn on and it doesn't flow water.

My furnace is a Goodman gms81155cna

How my wires are connected:

Gf : G
H. : both to humidifier
W : w
G : g
OAT : outside air temp
C : c
R : r

Is there something that I am missing?

Thanks in advance. Brian
 
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Old 11-21-10, 02:05 PM
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Is W and G by itself at the humidistat???

you could do the W/G on the board, or on the pressure switch.

What you have now on the board. If you do the swtich, then move the W/G wire to that.
Hstat------Fur.
R-----------R
C&Cf*-------C (*= jumper between these two)
W/G--------W

H to the humidifier.

Make sure mode switch set to "A" (Shown on page 11 Fig G)

Page 5 Fig G set the dial to B or C that fits your location.
 
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Old 11-21-10, 04:57 PM
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Originally Posted by Jay11J
Is W and G by itself at the humidistat???

you could do the W/G on the board, or on the pressure switch.

What you have now on the board. If you do the swtich, then move the W/G wire to that.
Hstat------Fur.
R-----------R
C&Cf*-------C (*= jumper between these two)
W/G--------W

H to the humidifier.

Make sure mode switch set to "A" (Shown on page 11 Fig G)

Page 5 Fig G set the dial to B or C that fits your location.
It is a model 60 Aprilaire humidistat if that helps

from left to right it has these hookups all separate:

R C A B ODT W G H H Gf


It doesn't have a Cf hookup and the W/G are separate. When I hook the Gf to C it blows the 3A fuse on the furnace. I have tried setting the mode on C and B.

Both Humidistat wires are hooked up to the Humidistat one wire to each H. Is that incorrect?

Thank you for the help.


ETA: link to Model 60 humidistat: http://www.aprilairecontractor.com/p...iers/31737.pdf
 
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Old 11-21-10, 05:16 PM
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Ok,

Hstat-------Fur
R------------R
C------------C
W-----------W

The G hook up can be used to run the fan if humidity is needed when there no call for heat. I tried this on my system, and it seems like it did not do much good, so I just set it to heat only.

If you want to do the fan, then wire the G below.
Hstat------Fur
Gf-----------G (Remove G stat wire and tie to G wire from Humstat)
G-----------------------------G wire from stat
 
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Old 11-21-10, 05:30 PM
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Hmmmm that is how I have it wired.

My only concern is how the humidifier is wired.

Right now I have the two brown wires going directly to the humidistat. In the pictures it shows it going through the 24v transformer. However there is a tag on the brown wires saying not to wire to a power source. The pictures show one going straight to the humidistat and one going to a transformer then to the humidistat. I think this might be where my problem lies.
 
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Old 11-21-10, 05:36 PM
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I missed that drawing.

I would then run a wire from the furnace.

H to the pressure switch.
H to one of the humidifier wire.

Other humidifier wire to C.
 
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Old 11-21-10, 05:49 PM
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Originally Posted by Jay11J
I missed that drawing.

I would then run a wire from the furnace.

H to the pressure switch.
H to one of the humidifier wire.

Other humidifier wire to C.
Is this instead of the other way? One wire from the humidifier to the humidistat and one to the pressure switch? Curious, where is the pressure switch? Thanks, sorry for being dumb about this.

EDIT:
Oh wait I missed the other wire to C, so I got that, but not sure where to wire up to the pressure switch. Thanks
 
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Old 11-21-10, 06:03 PM
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I have not been around these furnace, I am guessing there is an unused 1/4' male spade on the pressure switch you can hook the H wire to.

If there is no spade on there, then we can do this....

at the humidstat, add jumper wire from W to H. One of the humidifier wire to the other H. other humidifier wire to C.
 
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Old 11-21-10, 06:03 PM
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Can I hook up wire to the pressure switch to Y?

It looks as though that connection is tied with the pressure switch....

Thanks again.
 
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Old 11-21-10, 06:08 PM
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Originally Posted by Jay11J
I have not been around these furnace, I am guessing there is an unused 1/4' male spade on the pressure switch you can hook the H wire to.

If there is no spade on there, then we can do this....

at the humidstat, add jumper wire from W to H. One of the humidifier wire to the other H. other humidifier wire to C.
Ok. looks like I will try the jumper.

Thanks again.
 
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Old 11-21-10, 06:16 PM
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Originally Posted by Skierbri10
Can I hook up wire to the pressure switch to Y?.
No. Will start up the A/C, and may blow a fuse.
 
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Old 11-21-10, 06:36 PM
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Awesome works great!!!! Thank you so much. I wish I knee of a way to repay you somehow.
 
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Old 11-21-10, 06:44 PM
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Glad to hear it's working.

If you have skills in another area that you can share with others, jump on to another area of DIY and help out people.
 
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Old 11-23-10, 02:33 PM
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I have another question on the wiring here. I live in Colorado and many days our temperature is above 50F in the day and my furnace doesn't come on. The 700a is working great, but I am thinking it would work better if I can have to blower fan come on during the day at times. I hooked it up to do this and in test mode the humidistat turns on the blower, however the humidifier doesn't turn on. Where can I alter the wiring to get this to work. I am assuming I have the humidifier set up to "hear" the heat signal, but what would be the "fan" signal?

So far after a couple of days the humidity gets up to 35% by morning but drops back down to 25% in the day. The heater runs often at night since it has been getting in the 20's here at night but 50ish during the day.

Thanks
Brian

BTW Outside humidity today is 9%.....ouch.
 
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Old 11-23-10, 08:41 PM
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Originally Posted by Skierbri10
The 700a is working great, but I am thinking it would work better if I can have to blower fan come on during the day at times.
With that hstat, there is no way to add humidity into the air when the system is not running.

I am assuming I have the humidifier set up to "hear" the heat signal, but what would be the "fan" signal?
You could change the wire around for it to get the single for the fan, but that will only be if you turn the stat switch to fan "ON", but if you put it back on "AUTO", it not going to do anything. We could add a relay then it can look for both heat call or fan ON.

Other thing I can suggest is take that humidistat out, and upgrade to TrueIAQ stat, or VisionPro IAQ.



BTW Outside humidity today is 9%.....ouch.
Yikes, that's dry!
 
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Old 11-23-10, 08:51 PM
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Hmm... The model 60 says it has the blower activation built in. The blower is activated by the humidistat but the humidifier doesn't turn on until the heat signal is sent. I wonder what connection would send the signal for heat?
 
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Old 11-23-10, 09:12 PM
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I keep on forgetting about this new control.. I'll look at in morning.. Getting a bit sleepy here..

Night.
 
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Old 11-23-10, 09:14 PM
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Originally Posted by Jay11J
I keep on forgetting about this new control.. I'll look at in morning.. Getting a bit sleepy here..

Night.
Lol I understand. Thanks again.
 
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Old 11-24-10, 05:44 AM
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Ok, I'm awake now!

If you want to do the fan, then wire the G below.
Hstat------Fur
Gf-----------G (Remove G stat wire and tie to G wire from Humstat)
G-----------------------------G wire from Tstat

Then set "Blower Actvation" switch on hstat to ON
 
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Old 11-24-10, 12:10 PM
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Originally Posted by Jay11J
Ok, I'm awake now!

If you want to do the fan, then wire the G below.
Hstat------Fur
Gf-----------G (Remove G stat wire and tie to G wire from Humstat)
G-----------------------------G wire from Tstat

Then set "Blower Actvation" switch on hstat to ON
well, that is how it is hooked up. I wonder since I have a jumper between W and H if I put it from G to H if that would make the difference?
 
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Old 11-24-10, 01:23 PM
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Looks like we are going to have to move the jumper. Put R to H instead of W.
 
 

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