Aprilaire 500 question

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Old 03-23-16, 06:34 PM
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Aprilaire 500 question

Does the aprilaire 500 cycle the fan to circulate the air and not turn the solinoid vale on.
 
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Old 03-23-16, 06:45 PM
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Welcome to the forums.

On the fan forced humidifiers..... the fan and the solenoid are active at the same time.
However..... the model 500 doesn't have a fan in it.

Do you mean does the automatic humidistat turn on the furnace blower and not turn on the solenoid ? That would still be no.
 
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Old 03-23-16, 06:49 PM
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Where would I check to correct this. The fan seems to kick on for 30 seconds every few hours.
 
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Old 03-23-16, 06:50 PM
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Are you talking about the furnace blower ?
Do you have the automatic humidistat ?

I DO NOT wire my humidistats to control the blower.
 
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Old 03-23-16, 06:57 PM
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Yes, I am talking about the furnace fan. It seems to cycle without turning the water valve on. The valve does go on when the furnace kicks on and requires humidity. Don't know why the fan goes on by itself.

I wired it per the instructions that came with the units.

I do have the digital humidistat.
 
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Old 03-23-16, 07:03 PM
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I'm guessing here that you are using the automatic humidistat.

That would mean that you've used the G and Gf terminals. You are letting the humidistat turn the blower and humidifier on without heated air. You need to check and see if the HH terminals are closing when the fan is running.

If the humidifier does run when the furnace is running then it sounds like a humidistat problem. You could disconnect the Gf wire and that problem will stop.
 
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