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Installing Wyze Thermostat on Dual Transformers
Some systems with heating and cooling are configured with a dual
transformer design. That means you have both Rc and Rh wires being
used, Rc = cooling side, Rh = heating side. As long as you have a C
terminal on the same board as Rc, your system is compatible with
Wyze.
There are four cases that you should be aware of:
1. C-wire coming from the Rc board.
2. C-wire coming from both Rc board and Rh board.
In both cases above, nothing needs to be done at the control board.
Please continue installation from the Wyze app.
3. C-wire is coming from the Rh Board: For compatibility with
Wyze Thermostat:
1. Remove the C-wire from the Rh board.
2. Connect the wire directly to the C terminal of the Rc
board.
4. No C-wires - In the case that you have no C-wire connected.
Review the image below for the modified CWA installation.
The CWA will be solely connected to the Rc board.
Note: If you open your thermostat wiring and see a jumper wire
between the Rc terminal and the Rh terminal, this is not a dual
transformer system.
Resetting your Wyze Thermostat
A: If you want to reset the device:
1. Press and hold the wheel/knob on the thermostat for 10
seconds.
2. Turn the wheel to select "Yes" to answer the question "This
will reset all settings, Continue?"
3. Push/press the knob to reset the thermostat.
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