Installation Precautions
- Before installing the Smart Thermostat or servicing the HVAC equipment, turn off power to the system.
- Leave power off until you have finished installing or servicing the HVAC equipment.
- Shorting the electric terminals at the control on the heating or cooling system is not recommended. Do not test the system this way.
- When testing the existing system or the new Smart Thermostat do not run the cooling system when it is cold outside as this may harm the compressor.
- This thermostat should only be powered by 4 AA alkaline batteries or a listed Class 2 power supply at 24 VAC (C-Wire or wall transformer).
- An amperage higher than 1 amp to each thermostat terminal may cause damage to the thermostat. Verify that the system is 24 VAC. If the old system is labeled as 120 V or 240 V 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.
In the box
Thermostat Overview
Preparation
Thermostat Installation
CAUTION: Do NOT insert more than one wire to a terminal.
Setup
Depending on the system type and configuration, the thermostat may request the following information during setup:
Heat Type: Tells the thermostat whether it should turn on the fan during a heating cycle.
- Forced air heating: Electric
- Radiant floor heating: Fossil
- Fossil/electric baseboard heating: Fossil
- Radiators: Fossil
- If unsure: Unsure
Backup Heat Type: Tells the thermostat what type of auxiliary/backup heating the heat pump uses. - Electric: This is the most common type of backup heating.
- Dual Fuel: Some heat pumps use a fossil furnace (for example, natural gas, oil, or propane) for backup heating.
- If unsure: The system will automatically detect which heat type is appropriate for your system.
Z-Terminal: A “dynamic” terminal that can be used for a variety of different system functions. If using the Z terminal, you must specify its function.
Note: Z uses the RC power and W2 is not available in a dual power system configuration where the RC-RH jumper is removed. Accessories powered by the transformer connected to RH will not operate if the RC-RH jumper is removed.
W2: Second stage of heat or aux
Y2: Second stage of cool or heat pump
H: Humidifier
DH: Dehumidifier
EX: Ventilation (HRV, VRV, air baffle)
Test the System
CAUTION: Do not test the cool mode during cold weather. Wait for mild weather to fully test the system.
After successfully installing and setting up your new Smart Thermostat, please test the Smart Thermostat and HVAC system.
- If the Smart Thermostat will control a heating system, test the heating system by changing the mode to HEAT and adjusting the setpoint to be higher than the current room temperature. Verify the heating system turns on and that
the room is starting to warm up. - If the Smart Thermostat will control a cooling system, test the cooling system by changing the mode to COOL and adjusting the setpoint to be lower than the current room temperature. Verify the cooling system turns on and that the room is starting to cool down.
Operation
Using and Changing the Batteries
If the thermostat batteries are low, replace the batteries with four new AA batteries.
- Remove the thermostat from the back plate by pulling the
thermostat straight out and off the wall. - Take out the existing batteries.
- Insert the new batteries following the specified polarity markings on the thermostat.
- Return the thermostat to the Back Plate by pressing the thermostat body firmly into the back plate mounted to the wall. Ensure that the pins on the body are correctly aligned with the back plate. Failure to do so could cause damage to the thermostat.
Battery Advisory
Always replace the batteries as soon as you have low battery levels, indicated by “LOW” then “BATT” flashing on the thermostat. If the batteries drain, the thermostat could leave the HVAC system on or off, 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 with vacation homes, you should replace the batteries as a preventive measure against battery failure while you are away.
- Always use new batteries as replacements.
Humidity Control
The thermostat can adjust the humidity level in your homeby directly controlling an external humidifier, dehumidifier,or by using the cooling system to dehumidify. For anexternal humidifier or dehumidifier, the thermostat mustbe configured to use the Z terminal. For controllingdehumidification by the cooling system, a cooling systemmust be present without an external dehumidifier. In thiscase, the thermostat will extend your cooling cycles toreach your dehumidification setpoint. To changehumidification/dehumidification settings refer to theCustomer Website.
Ventilation
The thermostat can control a ventilation system (HRV, VRV, or air baffle) using the Z terminal. By default, the thermostat will operate the ventilation system for 15 minutes every hour. To change the ventilation settings, refer to the advanced configuration settings through the Customer Website or Mobile App. If the settings are not available, please contact your service provider.
Additional Configuration
Although the default settings will be appropriate in most cases, you also have the option to change all configuration settings via the Display. Open the Settings menu and proceed to the relevant settings.