Carrier TP-WEM01 Installation Manual page 12

STEP 6. CONNECTING THE DISPLAY
With the Carrier logo positioned at the bottom, gently push the
display to the backptate until you hear it snap into place.
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Now you can turn the power back on to your heating and
cooling system. Return to your circuit breaker or on/off switch
and restore the power to your system.
The C6r thermostat will automatically power on. In about one
minute, its guided software setup will be ready to help you
complete your installation.