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What is the configuration of the wires on the COR AC/HP

Customer Question
Wi-Fi thermostat that is replacing...
What is the configuration of the wires on the COR AC/HP Wi-Fi thermostat that is replacing an Infinity System thermostat without a C wire? The infinity is labeled A (green), B (yellow), C (whie), and D (red).
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: I had a renter who broke the infinity thermostat. Only problem is that; the system was serviced this past summer is is fine.
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: I took a picture of the wiring before removing the infinity; the COR is already mounted, just need to know the order for the wiring. It was easy to install so far. (and the HVAC is powered off at the circuit breaker).
Submitted: 1 year ago.Category: HVAC
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Answered in 6 hours by:
11/10/2016
HVAC Technician: airheatman, HVAC Technician replied 1 year ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,528
Experience: Furnace, A/C and heat pump specialist.
Verified

Lets start by deciding if you really want to go to the COR.

Your Infinity system is a high tech and high efficient system that uses what is called a communicating system.The AB terminals provide volte where the CD terminals are data transfer wires. In other words the thermostat, air handler and outdoor are "talking" or communicating with each other 24/7 to determine the most efficient way to operate.

The COR is a conventional (non communicating) thermostat.

So you will be sacrificing some features and efficiency with the COR.Let me know and we will proceed accordingly

Also you will need 6 to 7 wires rather than the 4 wires, So let me know if you have unused wires we can use in the bundle at thermostat and units.

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Customer reply replied 1 year ago
I have to change the thermostat out. I had a tenant who moved out in August and left a busted thermostat behind. The "hot/cold" buttons were broken off. Buying another infinity system is out of the question at its cost. There are only 4 wires in the bundle.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Tell me model on units (indoor and outdoor)

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Customer reply replied 1 year ago
I only have the outdoor carrier unit -- The model is 50CR-042---301
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK we would still need 6 wires between thermostat and unit

1. Red 24v power

2.Green -Fan

3.Orange- Reversing valve

4.Blue-----24v Common

5. White ----Heat elements

6. Yellow - AC compressor

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Customer reply replied 1 year ago
Does that mean the COR isn't compatible with my unit?
Customer reply replied 1 year ago
Can you tell me the order the wires go in?
Customer reply replied 1 year ago
I paid $28 for this and still don't have an answer to my original question.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Sorry,had to run to bank.

The thermostat is compatible but you will need more than 4 wires. There is no conventional thermostat that will work with the heat pump using 4 wires.

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Customer reply replied 1 year ago
I guess that puts an end to a self-installation. Thanks for your help.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

If you can run additional wires between units and thermostat, it is a very simple procedure to hook up thermostat.Just et me know.

If you have further questions, please let me know.

Thanks for letting me work with you.If my answer has been polite, professional,and thorough, please click one of the ratings before you go. If you still need help let me know!.Expert is not paid for assisting you until you rate answer.Feel free to follow up for 30 days at no additional cost. Bonus always appreciated if you feel justified.

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airheatman
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,528
8,528 Satisfied Customers
Experience: Furnace, A/C and heat pump specialist.

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