Congratulations and thank you for purchasing your new Daikin digital thermostat. This guide is intended to help you install and setup the basic features of the thermostat. For a full owner’s manual and installation guide, visit DaikinThermostats.com.
Compatibility
The Daikin thermostat is designed to work with 24Vac systems requiring both the R & C wires. This includes gas, electric, oil, forced air, variable speed, heat pump and radiant heat. It can control:
Remove the faceplate of current system. Most faceplates snap-off or feature small screws that will need to be removed.
WARNING: If you see large thick electrical wires, wire nuts, or if your system is labeled 120V or 240V DO NOT PROCEED. THIS THERMOSTAT IS NOT COMPATIBLE WITH THESE SYSTEMS
WARNING: Failure to follow this step can result in personal injury and/or death from shock and electrocution.
Determine what your existing wiring and equipment situation is before you disconnect any wires. If you are unsure of what type of system you have, you may need to seek professional support.
If you have a multi stage HVAC system comprised of a fossil fuel heater with air conditioning the Daikin thermostat will require the 5 wires mentioned above (R, C, W, Y, and G) plus an additional wire for each additional stage of Heating or Cooling. You may reduce the 5 wire requirement to 4 if you give up independent fan control, or use the optional accessory; Add-A-Wire.
If you have a heat pump without aux heat the Daikin thermostat will require 5 wires: R (24Vac), C (24Vac), W1/O/B (reversing valve), Y (1st stage compressor), and G (fan). If there are only 4 wires present that are connected to the existing thermostat, there are at least 3 options available to connect the Daikin thermostat, they are:
If you have a heat pump with aux heat the Daikin thermostat will require 6 wires: R (24Vac), C (24Vac), W1/O/B (reversing valve), Y (1st stage compressor), W2 (Aux Heat) and G (fan). If there are only 5 wires present that are connected to the existing thermostat, there are at least 3 options available to connect the Daikin thermostat, they are:
MAKING 4 WIRES WORK when 5 are required (without the optional Add-A-Wire accessory)
MAKING 5 WIRES WORK when 6 are required (without the optional Add-A-Wire accessory)
Wire from the old thermostat terminal marked | Function | Install on the new thermostat connector marked | Wire Color |
G or F | Fan | G | |
Y1, Y | Cooling | Y1 | |
W1, W | Heating | W1/0/B | |
Rh, R, M, Vr, A | Power | R | |
C | Common | C | |
O/B | Rev. Valve | W1/O/B* | |
W2 | 2nd Stage Heat | W2 | |
Y2 | 2nd Stage Cooling | Y2 | |
W3 | 3rd Stage Heat | W3 | |
H, Hum | Humidity | HUM | |
D, Dehum | Dehumidity | DEHUM | |
Ck1 | Dry Contact Switch | DRY CONTACT | |
CKGND | Dry Contact Switch | DRY CONTACT |
Note: O/B is used if your system is a Heat Pump.
Unscrew the current backplate and remove it from the wall. Be careful not to let the wires fall into the wall.
TIP: If needed, wrap the wires around a pencil or pen to keep them from falling inside the wall.
Ensure which switch is correct for your system. Dip switches are located on the back of the thermostat
For Heat Pump Only
When the GAS/ELEC or HEATPUMP dip switch is configured for HEATPUMP, this dip switch (O or B) must be set to control the appropriate reversing valve. If O is chosen, the W1/O/B terminal will energize in cooling. If B is chosen, the W1/O/B terminal will energize in heating.
This dip switch configures the thermostat to control a conventional gas/electric system or a heat pump. If your system is anything other than a heat pump, leave this switch set for GAS/ELEC.
Turn your furnace and air conditioner breakers back on at your breaker panel.
(Using the optional Wi-Fi module)
Overview
At minimum, the first 3 tasks below must be completed to access your thermostat remotely from a browser. The 4th step is optional (highly recommended) and only is needed to access your thermostat(s) from a mobile device.
These steps are:
Quick Start – Connect to Wi-Fi
The Daikin thermostats are joined to a Wi-Fi network with the help of the Daikin Configurator App. This app may be downloaded from your mobile device’s app store. Once the thermostat is installed with the optional Wi-Fi Module, the Configurator App will facilitate connection to the access point in 6 steps as outlined below.
Although there is more than one way to create a Skyport account, the steps below illustrate account creation from a browser. To create a Skyport account a thermostat must be joined to the account.
If the thermostat is connected to the local Wi-Fi Access Point, but you do not have a Skyport account, you may create an account and join the thermostat to the account by doing the following:
If the thermostat is connected to the local Wi-Fi access point but not yet joined to an existing Skyport account, you may join the thermostat to the account by doing the following:
Use the following troubleshooting guide to diagnose common problems. If you are still having problems or are unsure please visit www.daikinthermostats.com or e-mail customer service at thermostatsupport@daikinthermostats.com
Problem | Possible Cause | Solution |
The air conditioning does not attempt to turn on. | The compressor timer lockout may prevent the air conditioner from turning on for a period of time. | Adjust the Compressor Min. Off Time to “None”. |
The cooling setpoint is set too high. | Lower the cooling setpoint or lower the cooling setpoint limit. | |
You may have selected Free Cooling in settings. | If you don’t have a damper, and special duct work installed, turn off this feature in settings. | |
The display is blank. | Lack of proper power. | Make sure the power is on to the furnace and that you have a 24 vac between R&C. |
The heating does not attempt to turn on. | The heating setpoint is set too low. | Raise the heating setpoint or raise the heating setpoint limit. |
When using a residential heat pump the heat comes on instead of the air conditioning. | The thermostat reversing valve dip switch is set incorrectly. | Set the reversing valve dip switch to the opposite position. |
When calling for air conditioning both the heat and cool come on. | The thermostat equipment dip switch is configured for “HP” and the HVAC unit is a gas/electric. | Set the equipment dip switch for “gas”. |
Problem | Possible Cause | Solution |
The thermostat won’t connect to the access point. | Wrong password. | Enter the correct password. |
Access point offline. | Bring access point online. | |
Can’t connect to Skyport | No internet connection on access point. | Restore internet. |
Firewall restrictions | Check firewall settings. | |
Can’t get a 6 digit pairing code. | Thermostat already in account. | Factory default thermostat. |
Remove from Skyport account. |
One-Year Warranty – This Product is warranted to be free from defects in material and workmanship. If it appears within one year from the date of original installation, whether or not actual use begins on that date, that the product does not meet this warranty, a new or remanufactured part, at the manufacturer’s sole option to replace any defective part, will be provided without charge for the part itself provided the defective part is returned to the distributor through a qualified servicing dealer. THIS WARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred for diagnosing, repairing, removing, installing, shipping, servicing or handling of either defective parts or replacement parts. Such costs may be covered by a separate warranty provided by the installer.
THIS WARRANTY APPLIES ONLY TO PRODUCTS IN THEIR ORIGINAL INSTALLATION LOCATION AND BECOMES VOID UPON REINSTALLATION.
LIMITATIONS OF WARRANTIES – ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIMITED WARRANTY IS GIVEN. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON WHATSOEVER.
ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS. ALL REPLACEMENT PARTS, WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:
This equipment has been tested and found to comply with the limits for an intentional radiator, pursuant to Part 15, subpart C 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 in 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:
Notice: Only peripherals complying with FCC limits may be attached to this equipment. Operation with noncompliant peripherals or peripherals not recommended by Daikin, is likely to result in interference to radio and TV reception. Changes or modifications to the product, not expressly approved by Daikin could void the user’s authority to operate the equipment.
FCC – INDOOR Mobile Radio Information:
To comply with FCC/IC RF exposure limits for general population / uncontrolled exposure, the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
This Device complies with Industry Canada License-exempt RSS standard(s). Operation is subject to the following two conditions: 1) this device may not cause interference, and 2) this device must accept any interference, including interference that may cause undesired operation of the device.
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.
FCC ID: MUH-SKYPORT4
IC: 12547A-SKYPORT4
These numbers can be located on the inside of the thermostat backplate, in the upper right corner.
Download manual:
Daikin D4271C Programmable Thermostat Quick Start Guide
OTHER MANUALS
Daikin D4271C Digital Thermostat Owner Manual
Johnson Controls T7000e LCD Digital Thermostat Johnson Controls T7000e LCD Digital Thermostat Installation Guide
Honeywell T8635L Microelectronic Communicating Programmable Thermostat Honeywell T8635L Microelectronic Communicating Programmable Thermostat USER’s GUIDE
Hetta HS01RF WIRELESS THERMOSTAT Kit PAIRING INSTRUCTIONS Insert batteries into the Thermostat. Ensure that the…
HEAT-MAT NGT-567-0010 Underfloor Heating Thermostat Menu Introduction The NGT thermostat can switch your underfloor heating…
Honeywell RLV450 PROGRAMMABLE THERMOSTAT READ BEFORE INSTALLING DESCRIPTION * LP appears only for the first…
Honeywell RLV431 Programmable Thermostat Description The RLV431 thermostat can be used to control an electric…