Aprilaire 500 Humidifier & Model 60 Humidistat Wiring help.

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  #1  
Old 09-15-12, 08:36 PM
Z
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Aprilaire 500 Humidifier & Model 60 Humidistat Wiring help.

Hello,

I've recently installed the Aprilaire 500 into my furnace but have come into some problems with the wiring. I have looked all over and am amazed that nobody else has run into the problems I seem to be having. I have followed the schematic from the instruction manual and I just cant get it to work 100%. I can get the Humidifier to turn on and run when I put the Blower Activation switch On and set the Humidistat to Test. However the Blower will not turn on. When I turn the Blower activation switch OFF and run the furnace, the Blower will never turn on the humidifier.

I have a Goodman GKS90453BX Furnace with an EWC Control Panel. I have included pictures of my furnace and furnaces wiring diagram, the humidistat wiring diagram, and the EWC Control Panel.

I have 24V coming from the Control Panel jumping up to the R&C of the humidistat. The ODT terminals are hooked up to the Outside sensor, 1 of the H terminals are hooked up to the solenoid and the other is hooked up to the transformer included with the Aprilaire unit. The other leg of the transformer is going to the other solenoid on the unit. All of this seems pretty straightforward and I believe I have this area all correct.

I think my issue is coming from the W, G, & Gf taps. I have tried so many different combinations but can not come up with any that works. I've wired these taps directly to the furnace control & then tried again on the Control Panel. I've run out of ideas and would appreciate someones time and opinion very much.

Thank you in advance and if you have any questions let me know so I can clarify.

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Old 09-16-12, 07:44 AM
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G from the zoning panel to the furnace control board needs to go to be moved to G on the humidistat. Then Gf from humidstat needs to be connected to G on the furnace control board. W from furnace control needs to have an additional wire run to W on the humidistat. R and C from the furnace control also need to be connected to R and C on the humidistat. Other than in test mode, you may not be able to get the humidifier to turn on due to either the current indoor humidity or the outdoor temperature.
 
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Old 09-17-12, 11:09 AM
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That did it. Thank you so much for your time and for the great explanation. Much more easy to understand than the humidifiers instructions.
 
 

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