Wiring Dual Compressor Rheem Condensing Unit

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  #1  
Old 06-19-15, 02:55 PM
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Wiring Dual Compressor Rheem Condensing Unit

I have a Rheem RASL-048JEC Dual drive condensing unit. It is currently working and wired via Comfort Climate 2. I want to rewire it using conventional 24VAC.

What wires need to be changed. I found a manual for the unit online which has a wiring diagram but it looks like it is the diagram for Comfort Climate 2 wiring not conventional. And, to make it even more confusing, I found a second manual for the same unit with a different wiring diagram.

Any assistance would be much appreciated.

Here are links to download the diagrams I found:
https://dl.dropboxusercontent.com/u/...iagram%201.pdf

https://dl.dropboxusercontent.com/u/...iagram%202.pdf
 
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Old 06-20-15, 02:30 AM
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Difficult to tell , but it looks like you have terminals for Y1 , Y2 , C - Common & R - Red ? Sounds like you need four wire cable to the condenser unit , from the furnace . Do you have a wiring diagram for the furnace ?

God bless
Wyr
 
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Old 06-20-15, 04:20 AM
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Thanks for responding.

There is a Red (R) and Common (C) wire connected in the outside unit. I'm guessing they were just wired separately rather than using the same wire. Below are pics of the current wiring for furnace and what is supposed to be the new wiring once I switch to the conventional (24VAC) method.

Looking at the diagrams it appears I have 4 wires going to the outside unit now (R, C, 1, 2) and once rewired I'll need (R, C, Y1, Y2). So, my plan is to simply switch the 1 and 2 wires to Y1 and Y2, leaving the R and C alone.

Assuming that is correct, I am still confused about the wiring for the outside condensing unit. The condensing unit is a dual compressor unit and each compressor has it's own Y1 and Y2 connection point.

Should I connect the Y1 from inside to only one compressor, and the Y2 from inside to the second compressor? Or, should the Y1 from inside connect to the Y1 point on both compressors outside (and same for Y2)?

current furnace wiring diagram
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new (conventional) wiring diagram
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Last edited by okolowicz; 06-20-15 at 04:21 AM. Reason: forgot images
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Old 06-20-15, 04:59 AM
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Do not know about the dip switches .

But Y1 & Y2 are your 2 stages of cool . Yellow just about always goes to the condenser . With 2 stage cool , there are two yellows , Y1 & Y2 .

R - Red is the 24 VAC " hot " ( from the transformer ) going to the tstat .

C - Common is the other " side " of the 24 VAC from the transformer .

C will just about always be needed at the condenser . R usually is not , but this seems to be a special case .

I know nothing about the communicating tstat and equipment .

God bless
Wyr
 
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Old 06-20-15, 05:29 AM
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Thank you.

So, last question: Does the Y1 from inside connect to one or both compressors in the outside unit?

There are 2 compressors in the outside condensing unit and each compressor has a Y1 and a Y2 connector.
 
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Old 06-20-15, 07:10 AM
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Y1 at the tstat and Y1 at the furnace should connect to the first stage compressor . Y2 at the tstat to Y2 at the furnace should connect to the second stage compressor .

God bless
Wyr
 
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Old 06-20-15, 09:49 AM
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Both posted diagrams display pigtails on the left board.
Make all of your connections to the left board.

 
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Old 06-20-15, 05:41 PM
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Just wrote you in my other post. thank you. worked perfect!
 
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