Before installing or servicing the thermostat, turn off power to the system at the circuit breaker. Leave power off until the thermostat has finished installing or servicing. Shorting the electric terminals at the control on the heating or cooling system may damage the thermostat. Do not test the system this way. Follow all local codes and ordinances for wiring the system.

This thermostat should only be powered by two AAA 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 or 240 volts or has wire nuts, the system is high voltage. Do not install the thermostat to a high voltage system. Contact a local HVAC professional for help.

Box contents

Recommended tools

Thermostat overview

Buttons 

Icon	Function
	MENU: Access options to change the mode, fan, settings, and other features.
	UP: Adjust setpoint up or navigate the MENU.
	DOWN: Adjust setpoint down or navigate the MENU.
	SELECT: Select options in the MENU.

Modes 

Mode	Function
HEAT	Will activate the heating system.
COOL	Will activate the air conditioner.
AUTO	Will select either the HEAT or COOL mode automatically.
EMER	For use with heat pumps only. Will bypass the heat pump and enable the auxiliary/emergency heat.
OFF	The system will not heat or cool.

Display

Icon	Function
HEATING	Illuminated in HEAT, EMER or AUTO mode when the thermostat is calling for heat.
COOLING	Illuminated in COOL or AUTO mode when the thermostat is calling for cool.
	Illuminated when the thermostat is using one or more Alarm.com Temperature Sensors.

Location

If replacing an old thermostat, the new thermostat can be mounted in its place. If a new location is desired it will be necessary to move the wiring.

New installations and relocation should follow the accompanying guidelines to ensure the most accurate temperature reading and ease of use.

• Mount thermostat on an inside wall, approximately 5 feet (1.5m) above the floor in a frequently used room.
• Do not install in locations near appliances or devices that affect the local temperature such as televisions, lamps, or dryers.
• Avoid areas that are exposed to large temperature variances (e.g., direct sunlight, near an AC unit, above or below auxiliary heat and air vents, and drafts from windows).
• Be aware of what is on the other side of the wall where the thermostat is being installed. Do not install on walls adjacent to unheated rooms, stoves, or housing hot water pipes.
• Damp areas will not only affect the humidity reading of the thermostat, but could lead to corrosion and shorten the life of the thermostat.
• Install in a location with good air circulation. Stagnant air will not accurately reflect the rate of temperature change in the room. Avoid areas behind open doors, corners, and alcoves.
• Wait until construction and painting are finished before installing.

Preparation

The existing thermostat

1. Test the system.
   • Verify that the heating and/or cooling system is operating properly before attempting 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.
      
2. Turn 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 both the heating and cooling systems is off, follow these steps:
      
3. Remove thermostat cover.
   • Remove the cover from the existing thermostat.
     
     Caution: Do not disconnect the wires yet.
      
   • Verify 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.
   • Wiring can vary for each manufacturer. Identify all wiring before removing it from the existing thermostat.
     
     Important: Take a picture of the wires before you detach them from the existing thermostat for future reference.
      
4. Disconnect all of the wires and remove the existing thermostat.
   
   Important: Remember to secure the wires so they don’t fall into the wall.

Prepare the wires

Follow these guidelines for safe and secure wire connections:

• Verify the wires are a proper gauge between 18-24 AWG.
• Verify the wires have exposed straight ends about 1/4” long.

Caution: 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 the thermostat to a high voltage system. Contact a local HVAC professional for help.

Install the back plate

Use the bubble level provided on the back plate as a guide. Mark where the screws will go with a pencil through the screw holes on the back plate.

Note: If necessary, use the trim plate to cover up any marks or holes left from the old thermostat. Attach the trim plate before securing the back plate to the wall. Drill holes with 3/16” drill bit to tap in the drywall anchors for added support.

Install the new thermostat

Wire the new thermostat

Connect the wires to the new thermostat.

Caution: If there are extra wires, do not install them to the new thermostat. Please contact a local HVAC professional for additional assistance.

• If there is an R wire, connect it to either RC or RH and make the appropriate selection when asked which terminal is in use. This will create a digital jumper to the other R terminal that is not selected.
  
  Example: Selecting RC only creates a digital jumper to RH.
   
• If there are both RC and RH wires, a jumper is not needed. Select that both RC and RH are present during configuration.
• Z1 or Z2 can be used for W3, H, DH, or EX.

Note: If the customer has a 2-wire hydronic heating system, it may be necessary to add the power resistor to the system. Connect this resistor at your heating equipment (not the thermostat) between the C and W terminals. Additional information about the power resistor can be found in the Troubleshooting section.

Terminal designations

Conventional system

Terminal	Description
RC	Cooling power
RH	Heating power
Z1	Configurable W3, H (humidifier control), DH (dehumidifier control), EX (ventilation)
Z2	Configurable W3, H (humidifier control), DH (dehumidifier control), EX (ventilation)
W	Heat stage 1
W2	Heat stage 2
C	Common wire from secondary side of heating transformer (if 2 transformers)
Y	Cool stage 1
Y2	Cool stage 2
G	Fan
O	Energized in COOL mode
B	Energized in HEAT mode

Heat pump

Terminal	Description
RC	Cooling power
RH	Heating power
Z1	Configurable W3, H (humidifier control), DH (dehumidifier control), EX (ventilation)
Z2	Configurable W3, H (humidifier control), DH (dehumidifier control), EX (ventilation)
W	Aux stage 1
W2	Aux stage 2
C	Common wire from secondary side of heating transformer (if 2 transformers)
Y	Pump stage 1
Y2	Pump stage 2
G	Fan
O	Energized in COOL mode
B	Energized in HEAT mode

Insert the batteries

The thermostat can be powered by battery or 24 VAC. Even when powered by 24 VAC, it is still recommended to insert batteries as a backup in case the C wire fails. This also prevents low battery trouble conditions.

Note: If a wall transformer is used to power the thermostat, connect between C and RH. The system must be either heat-only or cool-only when using a wall transformer, as the transformer would wire into one of the R terminals (Rc or Rh depending on what is open) and the C terminal with the jumper removed.

Verify the batteries are installed following the specified polarity markings on the thermostat.

Caution: Battery Warning

• Always replace the batteries as soon as they have low battery levels, indicated by a caution sign and "LOW BATTERY" flashing on the display. If the batteries drain, the thermostat could leave the HVAC system on or off, overheating or freezing the home.
• If the thermostat buttons flash amber when pressed and the screen does not illuminate, the batteries in the thermostat are extremely low. Install fresh batteries immediately.
• 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, replace the batteries as a preventive measure against battery failure while away.
• Always use new batteries as replacements.

Attach the body and back plate

Verify that any excess wire is tucked back into the wall to allow room for the thermostat to sit flush against the back plate.

Return the thermostat to the wall plate by pressing the thermostat body firmly into the back plate mounted to the wall.

Caution: Verify that the pins on the body are correctly aligned with the back plate. Failure to do so could cause damage to the thermostat.

Turn the power on

Restore power to all the heating and cooling systems. This can be done at the circuit breaker.

Setup

The thermostat will automatically detect connected wires. Follow the on-screen instructions to complete the thermostat configuration.

Note: If the thermostat screen does not show all the connected wires, remove the thermostat from the wall and verify that all wires are properly connected. If issues persist, there may be a problem with automatically detecting your wiring. Please see the Bypassing Wire Detection information in the Troubleshooting section.

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 (e.g., natural gas, oil, or propane) for backup heating.
• If unsure: The system will automatically detect which heat type is appropriate for your system.

Z1/Z2 terminal function

These are the “dynamic” terminals. If an auxiliary wire has been connected, please specify the function it will perform.

• W3: Third stage of heat or aux
• H: Humidifier
• DH: Dehumidifier
• V: Ventilation (HRV, VRV, air baffle)

Add to the Z-Wave network

1. Put the Z-Wave controller into ADD mode. Refer to the controller documentation for more information.
2. Press the  button.
3. Select SETTINGS.
4. Select NETWORK.
5. Select ADD.
   
   Important: If enrolling the ADC-T3000 to an S2-compatible Z-Wave controller, it must be enrolled as an S2 device. The first five digits of the Device Specific Key (DSK) will appear after putting the thermostat into Add Mode, which should then be entered on the Partner Portal or MobileTech app. For more information about S2 compatibility and this process, see Add an S2-encrypted Z-Wave device.
    
6. Log into the Customer Website to sync the thermostat with the customer's account.

Configure the thermostat

While the default settings online will be sufficient in most cases, you also have the option to change advanced configuration settings (e.g., Swing, Differential, Fan Circulation Period, Fan Circulation Duty Cycle, Maximum Setpoints, Minimum Setpoints, and Thermostat Lock).

Caution: Be careful when changing advanced configuration settings. These configuration settings should only be changed by those familiar with heating and cooling systems’ parameters. Contact a local HVAC professional for help.

Change the default settings

Use the following instructions if you wish to change the default settings on your thermostat.

Changing the temperature display from Fahrenheit to Celsius

1. Press the  button.
2. Select SETTINGS.
3. Select USER.
4. Select F/C.
5. Select C.

Enabling motion-detected wake

This setting will enable the thermostat screen to wake when motion is detected nearby.

Note: This feature is only available if the thermostat is AC powered.

1. Press the  button.
2. Select SETTINGS.
3. Select USER.
4. Select MOTION.
5. Select ON.

Disabling AUTO mode

1. Press the  button.
2. Select SETTINGS.
3. Select USER.
4. Select AUTO.
5. Select DISABLE.

Humidity control

The thermostat can adjust the humidity level in your home by directly controlling an external humidifier or dehumidifier.

For an external humidifier or dehumidifier, the thermostat must be configured to use the Z1 or Z2 terminal. Z1 and Z2 configuration can be found in the Settings section of the Installer menu. If a cooling system is present without an external dehumidifier, the thermostat will extend your cooling cycles in an attempt to reach your dehumidification setpoint.

Changing the humidity mode

Select the mode for which you would like to control humidity.

1. Press the  button.
2. Select SETTINGS.
3. Select USER.
4. Select HUMIDITY.
5. Select MODE. Modes include OFF, DEHUMID, HUMID, and AUTO.
   
   Note: AUTO will select either the DEHUMID or HUMID mode automatically.
    
6. Select the desired mode.

Changing the dehumidifier setpoint

Verify that the humidity mode selected is either DEHUMID or AUTO.

1. Press the  button.
2. Select SETTINGS.
3. Select USER.
4. Select HUMIDITY.
5. Select SETPOINT.
6. Select DEHUMID.
7. Use the  and  buttons to adjust the desired dehumidifier setpoint.

Changing the humidifier setpoint

Verify that the humidity mode selected is either HUMID or AUTO.

1. Press the  button.
2. Select SETTINGS.
3. Select USER.
4. Select HUMIDITY.
5. Select SETPOINT.
6. Select HUMID.
7. Use the  and  buttons to adjust the desired humidifier setpoint.
   
   Note: The thermostat enforces a 20% "deadband" or minimum difference between the minimum and maximum humidity setpoints. Moving one of the setpoints within 20% of the other will force the other setpoint to move automatically to maintain the 20% deadband.

Ventilation

The thermostat can control a ventilation system (HRV, VRV, or air baffle) using the Z1 or Z2 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 Partner Portal, Customer Website or mobile app.

Thermostat reconfiguration

If the wiring changes, or if a mistake was made during initial configuration, the thermostat's HVAC settings can be reconfigured. This process will not remove the thermostat from the Z-Wave network. However, all HVAC settings and configurations will be set back to their default values, and the thermostat will present the user with the initial setup screens again.

Reconfiguring the thermostat

1. Press the  button.
2. Select SETTINGS.
3. Select INSTALLER.
4. Select RECONFIG.

Check the system

Caution: Do not test the AC during cold weather or heat during hot weather. Wait for mild weather to fully test the system.

Check heating

1. Press the  button.
2. Select MODE.
3. Select HEAT.
4. Press the  button to raise the setpoint above room temperature. Wait five minutes for the system to turn on.
5. After verifying the heating system is working, return the setpoint to the desired temperature.

Check cooling

1. Press the  button.
2. Select MODE.
3. Select COOL.
4. Press the  button to lower the setpoint below room temperature. Wait five minutes for the system to turn on.
5. After verifying the heating system is working, return the setpoint to the desired temperature.

Operation

Waking the device

1. Press any button to wake the thermostat up.
2. After waking, the display will show the current mode, room temperature, and setpoint.

Changing the mode and setpoint

1. Press the  button.
2. Select MODE.
   • The modes are HEAT, COOL, AUTO, EMER, and OFF.
   • The thermostat will only show the modes that are available based on the system configuration.
   • When in EMER mode, the thermostat will flash EMER when the display wakes up, and it will show HEAT at the top of the screen. Changing the mode will leave EMER mode.
3. Select the desired mode.
4. Once in the desired mode, press the  and  buttons to adjust the desired setpoint.
   • In AUTO mode when the system is idle, the screen will display AUTO. The thermostat will display HEATING when calling for heat and COOLING when calling for cool.

Changing the fan mode

1. Press the  button.
2. Select the FAN MODE option.
   • The fan modes are AUTO, ON, and CIRCULATE. The thermostat will only show the fan modes if it has been configured to control a fan.
   • AUTO mode will automatically turn the fan on when your system is either heating or cooling.
   • CIRCULATE will turn the fan on for 15 minutes every hour by default. The duration for CIRCULATE can be configured from the online account.

Changing the batteries

If the thermostat batteries are low, replace the batteries with two new AAA batteries.

1. Remove the thermostat from the back plate by pulling the thermostat straight out and off the wall.
2. Take out the existing batteries.
3. Insert the new batteries following the specified polarity markings on the thermostat.
4. Return the thermostat to the wall plate by pressing the thermostat body firmly into the back plate mounted to the wall.
   
   Important: Verify that the pins on the body are correctly aligned with the back plate. Failure to do so could cause damage to the thermostat.

Troubleshooting

Heating or cooling does not turn on when the set point is above or below the room temperature

To prevent damaging the compressor, the thermostat inserts a delay when cycling the compressor. If the system should be on and it’s not, then change the set point to be 2 degrees beyond the current set point and wait 5 minutes to see if the system turns on. If not, contact a local HVAC professional.

Heat pump is “cooling when it should be heating” or “heating when it should be cooling”

Some heat pumps use the O terminal, while others use the B terminal. If there is a wire in the O terminal of the ADC-T3000, move it to the B terminal. If the B terminal in the ADC-T3000 has been wired, move it to the O terminal. Contact a local HVAC professional for further help with this issue.

Thermostat buttons flash amber and screen does not illuminate

The batteries in the thermostat are extremely low. Install fresh batteries immediately.

Automatic wiring detection feature is not correctly identifying wires

If the automatic wire detection feature is not correctly identifying the wires, please proceed to bypass the automatic wire detection.

Note: If configuring the wiring for the first time, proceed to step 7. 

1. Press the  button.
2. Select SETTINGS.
3. Select INSTALLER.
4. Select CONTINUE.
5. Select RECONFIG.
6. Select YES.
7. Select whether the HVAC system has RH ONLY, RC ONLY, or RH AND RC.
8. On the wiring detection screen, select NO. The thermostat will display Check Wiring and Reinstall.
9. Select BYPASS and continue through the remaining prompts to manually configure the thermostat.
   
   Note: You will need to know the system type, heat type, and number of stages to complete the installation.

Locating the INSTALLER (setup) menu

The initial setup menu can be accessed at any time.

1. Press the  button.
2. Select SETTINGS.
3. Select INSTALLER.

Remove the thermostat from the Z-Wave network

If for some reason the thermostat must be removed from the network, follow the steps below:

1. Put the Z-Wave controller into Remove mode. Refer to the controller documentation for more information.
2. Press the  button.
3. Select SETTINGS.
4. Select NETWORK.
5. Select REMOVE.
6. Follow the on-screen instructions.

Thermostat displays "Safety Delay" on the screen

The thermostat will protect your compressor from short cycling and display "Safety Delay" with a timer on the screen. When the timer expires, the thermostat will automatically resume heating or cooling.

Thermostat displays "System Protect" on the screen

System Protect is a 5-minute delay prior to calling for heating or cooling to protect the system from short cycling. It is only applied if the thermostat has detected an unexpected relay state internal to the thermostat during a call. 

System Protect is intended to cover rare cases of power issues with the HVAC system. If System Protect is being seen frequently or appears on every call for heat or cool, it points to poor HVAC performance or pre-existing incompatibility. If System Protect occurs while the thermostat is in cooling mode, and the R wire is in Rh, this may be resolved by moving the R wire to Rc and reconfiguring the thermostat. For more information, see Thermostat reconfiguration.

Frequent or extreme System Protect delays can be resolved by installing an isolation relay.  

Thermostat screen doesn't continuously light up

The thermostat display cannot be lit up indefinitely. See Enabling motion-detected wake to have the screen light up when a person walks up to the thermostat.

Thermostat displays "Power Resistor Required" on the screen

The customer's system requires the included power resistor to be installed on the zone valves on their HVAC equipment. See the diagram below for where to install the power resistor between terminals 1 and 2 on Taco valves.

Note: If the included power resistor is misplaced, it can be replaced with a 1000 ohm, 1/2 watt resistor.

Thermostat displays "Isolation relay required" on the screen

The thermostat has detected overcurrent on one or more terminals. To resolve, it is recommended to isolate each of the W, Y, and G wires. Alarm.com recommends the Emerson 90 380 Fan Relay 24 Volt Coil, 1. Contact an HVAC technician if unsure of how to install an insolation relay.

The thermostat isn't acting as a repeater in the Z-Wave network despite having a common wire

The thermostat is only a repeater when it has been added into the network while it has a common wire connected and powered. If the thermostat receives a common wire after being added to the network, the thermostat will need to be removed and re-added to enable the repeater functionality.

Changing advanced features and settings for the thermostat

Advanced thermostat configurations and features such as outdoor balance point, staging delays, venting (HRV, VRV, and air baffles), and Geo-Services require an online account and security panel or gateway. Use the Partner Portal, Customer Website, or mobile app to configure these options.

Resetting the thermostat to factory defaults

The thermostat can be reset back to its factory settings. This will reset all of the HVAC settings, rules, and schedules on the thermostat, and it will also remove the thermostat from the Z-Wave network.

Note: The panel or gateway will be unaware that this procedure was performed, so it is recommended that you follow the process in the Remove the thermostat from the Z-Wave network section before performing this reset.

1. Press the  button.
2. Select SETTINGS.
3. Select INSTALLER.
4. Select RESET.

Notices

FCC

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference. –and–
2. This device must accept any interference received, including Interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

IC

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

Conformément à la réglementation d’Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d’un type et d’un gain maximal (ou inférieur) approuvé pour l’émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l’intention des autres utilisateurs, il faut choisir le type d’antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l’intensité nécessaire à l’établissement d’une communication satisfaisante.

Z-Wave

This product can be operated in any Z-Wave network with other Z-Wave certified devices from other manufacturers. All non-battery operated nodes within the network will act as repeaters regardless of vendor to increase reliability of the network.

Note: The grantee is not responsible for any changes or modifications not expressly approved by the party responsible for compliance. Such modifications could void the user’s authority to operate the equipment.