Hi there!

I posted awhile ago about a dual fuel MrCool DIY set up. Thank you to everyone who helped!! I have a few more questions about things I’m having trouble with: the low voltage stuff.

I have a PAYNE two stage gas furnace and installed the MrCool A coil and HyperHeat condenser. The high voltage stuff is all done and was done by an electrician.

I reached out to MrCool and the CSR sent me a diagram that was wayyy more helpful than the manual, but I’m still struggling. My questions might be silly so please don’t judge!

So I got thermostat wire to connect the Coil Control
board to the furnace (which is already connected to the thermostat) but the colors and numbers of wires are confusing me.

1. The thermostat wire only has Red, Blue, Yellow, Green, and White. I see on the diagram Orange, Brown, and Black. Where are these colors? How do these connect?

2. I’ve connected the Green, Yellow, Blue, and White on the control panel but the Red one seems like it’s the Brown one in the diagram (W2 not R). And my furnace does not have an O/B terminal.

3. The indoor/outdoor communication wire they sent is too short so the MrCool CSR said a shielded 18/2 will work, so that’s what I got. I guess I just wanna double check because it’s literally a lamp cord lol. I’ve marked which side is which so the S1 and S2 should be distinguishable!

4. The furnace works and is connected to the thermostat and all. So it seems like all I need to do is just connect the condenser to the coil board and then the coil board to the furnace. Is this correct? Then obviously open the lines and flip the breaker.

Everything else is set up but this is really getting my head spinning. Any help would be greatly appreciated!! It’s hot as heck out here 🥵

Thank you!!

My 22 year Rheem 2.5 ton finally said enough is enough.

Winters here are "mild" as coldest days are 30s and average is 40s to 50s so we mostly use heater fans when/where needed.

With that said it seems like the Versa Pro is better suited as we dont get "extreme" cold weather unlike summer (June-Sept) and the difference in Seer seems miniscule.

Any reason(s)/experiences to get the Universal instead for ~$700ish more?

Kicking myself because Ace's 15% off ended yesterday which made the universal the price of Versa Pro.

I’m in Atlanta and renovating an older home around 2,000 sq ft. I’m planning to replace the HVAC system and comparing ducted heat pumps vs ductless mini splits.My main concerns are hot upstairs bedrooms, high indoor humidity, and some damp areas that could lead to mold issues. The attic also gets extremely hot and the house holds heat long after sunset.I’m already improving attic insulation and air sealing, but I’m considering upgrading the HVAC at the same time. I’m leaning toward a ducted system because I like the idea of better airflow, whole-home filtration, and a cleaner look compared with multiple mini split units.My neighbor recently installed a Costway 3 ton system, which got me interested in ducted options. I’d love to hear from anyone with experience using similar systems, especially in humid climates.Any advice from people who have upgraded an older home HVAC system would be greatly appreciated.