Product Manual
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Smart Thermostat HD Overview
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Smart Thermostat HD Hardware
Display
Thermostat
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Button
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Status LED
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Installation Precautions
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Before installing the Smart Thermostat HD or servicing the HVAC equipment, turn off power
to the system.
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Leave power off until you have finished installing or servicing the HVAC equipment.
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Shorting the electric terminals at the control on the heating or cooling system is not
recommended. Do not test the system this way.
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When testing the existing system or the new Smart Thermostat HD do not run the cooling
system when it is cold outside as this may harm the compressor. Please wait for mild
temperature to test the cooling system.
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You must follow all local codes and ordinances for wiring the system.
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This Smart Thermostat HD should only be powered by a listed Class 2 power supply at 24
VAC (C-Wire or wall transformer).
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An amperage higher than 1 amp to each thermostat terminal may cause damage to the
thermostat.
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Verify that the system is 24 VAC. If the old system is labeled as 120 or 240 volts or has wire
nuts, the system is high voltage. Do NOT install this thermostat on a high voltage system.
Contact a local HVAC professional for help.
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Questions?
Visit: www.alarm.com/supportcenter or contact your service provider.
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Smart Thermostat HD Installation - Considerations
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This Smart Thermostat HD requires 24 VAC power, it does not have the option to be battery
powered. This is supplied via a common wire, typically identified as C.
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The Smart Thermostat HD can adapt for situations where there are not enough wires in the
bundle at the install location. For example, if you do not have C-Wire but do have 24 VAC
available at the HVAC unit, or if you have upgraded your HVAC equipment and now require
more control wires. For these scenarios, the Smart Thermostat HD may be installed in a way
that requires only 2 wires at the wall. For instructions on this install configuration and
further information, please find the Installation Guide in the separate Power Plate box.
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In the Box / Recommended Tools
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Smart Thermostat HD - Thermostat
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Smart Thermostat HD - Display
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Trim Plate
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Wall Screws x2
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Drywall Anchors x2
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Phillips Screwdriver
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Camera
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Pencil
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Needle nose pliers
