Carrier Thermostat to Wyze


Old 12-29-20, 10:04 AM
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Carrier Thermostat to Wyze

I've been trying to figure out the wiring of my system by searching previous threads and had a few follow up questions.I am trying to install a Wyze thermostat (similar to Nest)

I currently have a Carrier M/N: 58CVA070 and the thermostat has V+ and Vg terminals. The line from the wall has Red, White, Yellow, Green, and Blue wires with the Red connected to V+, the White connected to Vg and the other 3 not connected to anything. The lines out of the EIM has a 2 wire R/W for V+/Vg and a 5 wire one for Rh, W/W1, G, Y/Y2, C. So which one of these lines is going to the stat? Are the 3 unused wires at the stat even connected to anything? Can you just use the 5 wires at the stat to connect my new one?


Carrier Stat

Inside Carrier Stat

EIM Wiring

EIM Wiring Guide

Old 12-29-20, 10:15 AM
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Welcome to the forums.

You need to determine what is connected to D1 and D2.

You need....
red - R
white - W
blue - C
yellow - Y
green - G
You have the bare minimum amount of wires.
You would not be able to control the D1/D2 item from the stat any longer
Old 12-29-20, 10:21 AM
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Your plan should work except for the black wire connected to D2. You need to trace that and see what it connects to. It may be a HRV or dehumidifier connection (slows blower speed).

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