Replacing Aprilaire 58 with A60 humidistat

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Old 01-25-21, 05:45 AM
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Replacing Aprilaire 58 with A60 humidistat

Newbie but thank God found you guys!! I think I answered my own question based on all the extremely helpful posts here - I have an Aprilaire 400 humidifier that had a #58 controller that died. I replaced it with the 60 - wired it up after tracing all the wires and newly connecting the “G” from the controller to the green thermostat wire and the “Gf” from the controller to “G” on furnace, which were both different from 58 wiring. Controller powers up but does not draw water when called for - checked saddle valve and replaced that, same thing. Figured only thing left is the solenoid - replaced that and still nada. Checked and cleaned orifice on output line side too. No water...

in reading the above posts do I need to tie in the two “H” terminals to the “R” and “C” terminals to power the solenoid?

appreciate any info.
Vince
 
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Old 01-25-21, 10:04 AM
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The HH terminals are just a switch..... no power. That means you have to run power thru it to get to the solenoid. Follow the diagrams above. Doesn't matter if you switch the R or C. You also need the W wire to the furnace to turn the unit on.
 
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Old 01-25-21, 02:30 PM
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Thanks but I am still blowing something here - W from furnace, also connected to W at thermostat, ran to W on controller. One solenoid wire now going to R on the controller, other one to H. Then other H connected to the C. Still get no water when test.
 
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Old 01-25-21, 02:35 PM
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Did you also connect R and C from the A60 to the furnace board ?
You need three connections to the furnace for the unit to work normally.
The G terminals only turn the blower on based on the A60 settings. Still needs R and C.

The diagram shows the minimum wiring. Yours also has the greenwires.
 
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Old 01-25-21, 03:14 PM
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R and C are connected to a transformer unit on side of the furnace - pic attached.
Is that transformer no longer needed then?
 

Last edited by PJmax; 01-25-21 at 04:26 PM. Reason: resized pic
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Old 01-25-21, 04:24 PM
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It's not really needed. If you want to use it..... it would need to be always live and you'd need to connect a jumper from the terminal with the white wire to C on the furnace board.

As I mentioned the H60 needs 24v on the W and C wire. If there is no C connection from your transformer.... there is no 24v seen on W.
 
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Old 01-25-21, 06:20 PM
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Again, I thank you so much for all your help as obviously u can tell I’m quir remedial with this. The old 58 had the same wiring off that transformer unit as it needed continuous 24v power for control so wouldn’t that be sufficient to power the 60 at R and C?
 
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Old 01-25-21, 06:37 PM
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The 60 and 62 were set up differently.

When you take power from the furnace..... it's on R and C.
On a call for heat 24v is sent out on the W wire. That means 24v between W and C.

If you are getting your 24v (R and C) from a separate transformer.... then the A60 is not referenced to furnace C. That means power is coming out on W but is not returning to C as it's not connected to the furnace.

Just add a jumper from your white transformer wire to C and your system should work ok.
 
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Old 01-26-21, 03:22 PM
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Alleluia!! That was it - wkg now!!
Thanks all your help!!
Vince
 
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Old 01-26-21, 04:08 PM
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Good job. Thanks for letting us know how you made out.
 
 

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