Aprilaire 600A from A58 humidstat to old 60 humidistat.


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Old 12-08-22, 02:48 PM
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Aprilaire 600A from A58 humidstat to old 60 humidistat.

I have a similar issue with my Aprilaire 600, and have tried the above wiring, but still cannot get the solenoid going. Here is how it' wired up:

R an C are connected to a 24v transformer on the side of the furnace, which is connected to the power supply 'before' the furnace control.
W is connected to W on the furnace.

I have the R on the humidistat connected to the Solenoid as well.
A jumper from the C to the 'left H on the humidistat, and the 'right' H connected to the other solenoid wire.

There is also a 'Com 24v' terminal on the furnace board. That red wire was previously connected to the 'Cf' on the old 58 Humidistat. now not connected to anything.

W was previously connected to the 'W/G' on the 58.







 

Last edited by PJmax; 12-08-22 at 09:29 PM.
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Old 12-08-22, 06:15 PM
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Welcome to the forums.

I separated this as your humidistat is not like the A60 as shown in the thread you posted in.
You have an Aprilaire 60 old style.... no A & B terminals.
 

Last edited by PJmax; 12-08-22 at 09:33 PM.
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Old 12-08-22, 07:34 PM
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I posted a picture of the 58 I had previously for reference, as well as pictures of the 60 I just installed. I need help on the 60 wiring.
 
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Old 12-08-22, 07:45 PM
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Ok.... so the last picture is the humidistat you want to use ?

I don't believe that's an A60. It only has ten terminals.
The A60 has eleven terminals.

 
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Old 12-08-22, 08:27 PM
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The box it came in said 60. It actually has 9 terminals.

I think your pic might be the 62?
 
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Old 12-08-22, 08:30 PM
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Here is the book that came with it. But I'm trying to wire up without the extra 24vac transformer like I've seen you describe in other similar threads
 
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Old 12-08-22, 09:19 PM
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The wiring between the transformer, R and C and the HUM terminals is not polarity sensitive.
The cable/wiring that goes from W and C on the humidistat to W and C on the furnace board must be followed.


 
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Old 12-08-22, 09:30 PM
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This is your old wiring which is ok. Just connect the C and W.
 
 

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