10 | Alarm.com Smart Thermostat
Product Manual
Insert Batteries Into the Thermostat
The thermostat can be powered by battery or
24 VAC. If a wall transformer is used to power
the thermostat, connect between C and RH.
Ensure the batteries are installed following the
specified polarity markings on the thermostat.
CAUTION: Special Battery Warning
• Always replace the batteries as soon as you have
low battery levels, indicated by “LOW” then “BAT”
flashing on the display. If the batteries drain, the
thermostat could leave the HVAC system on,
overheating or freezing the home.
• Always replace the batteries at least once a year.
This will protect the thermostat from damage and
corrosion by leaking batteries.
• If the home is unoccupied for a month or more,
such as vacation homes, you should replace the
batteries as a preventive measure against battery
failure while you are away.
• Always use new batteries as replacements.
