Alarm.Com ADC-T3000 User Manual page 7

Preparation
Test the system
Verify that the heating and/or cooling system
is operating properly before you try to install
the new thermostat.
! CAUTION: Do not test the system by shorting
electric terminals at the furnace or air conditioner.
This may damage the thermostat.
Turn the power off
Turn all heating and cooling systems off.
This can be done at the circuit breaker.
! CAUTION: Do not remove the existing thermostat
until power has been turned off at the circuit breaker.
Once power to the heating and cooling
systems is off, perform the following steps:
Remove the thermostat cover
Remove the cover from the existing thermostat.
Do not disconnect the wires yet.
Make sure the wires are identified correctly. If you
have an unidentified wire, it may be necessary to
identify the wire where it connects to the heating or
air conditioning equipment.
! CAUTION: Wiring can vary for each manufacturer.
Identify all wiring before removing it from the existing
thermostat. Take a picture of the wires before you
detach them from the existing thermostat for
future reference.
Disconnect all of the wires and remove the
existing thermostat. Remember to secure
the wires so they don't fall into the wall.
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