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6
Installation
2
Step 4: Look closely for any of the following indicators on your old thermostat's
backplate:
If you nd any of the above indicators, contact support for assistance.
(See page 1 for contact details.)
If none of these indicators are present, continue to the
next installation step.
WARNINGS FOR PRODUCT INSTALLATION
The MRCOOL Smart Thermostat only works with 24V AC. It does not work with line (high)
voltage or millivolt systems.
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