Daikin Programmable Electronic Thermostat

Product Overview

The Daikin Programmable Electronic Thermostat is designed for 1 Heat/1 Cool, Auto Changeover, and Fan Speed Control applications, suitable for hardwired installations. It supports single-stage heat/cool systems and single-stage heat pump systems.

Key Features

• 7-Day, 5-2-Day, or 5-1-1-Day Programmable
• Configurable for various HVAC systems
• Single-Stage Heat/Cool and Heat Pump Systems
• Two-Speed Fan Speed Selection
• Large Display with Backlight
• Selectable Fahrenheit or Celsius
• Compatible with Gas, Oil, or Electric heat
• SimpleSet™ Field Programming
• Status Indicator Light
• Relay Outputs
• Remote Sensor Compatible

Ideal Applications

• Residential (New Construction/Replacement)
• Light Commercial

Important Safety Information

• ⚠️ Always turn off power at the main power supply before installing, cleaning, or removing the thermostat.
• This thermostat is for 24 VAC applications only; do not use on voltages over 30 VAC.
• Do not short across terminals of a gas valve or system control to test operation; this will damage your thermostat and void your warranty.
• All wiring must conform to local and national electrical and building codes.
• Use this thermostat only as described in this manual.

Installation

Package Contents and Tools Required

Package includes: Daikin thermostat on base, thermostat cover, wiring labels, screws and wall anchors, Installation, Operation and Application Guide.

Tools required for installation: Drill with 3/16" bit, hammer, screwdriver.

To Remove Existing Thermostat

⚠️ ELECTRICAL SHOCK HAZARD - Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat.

1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker off.
2. Remove the cover of the old thermostat. This should expose the wires.
3. Label the existing wires with the enclosed wire labels before removing wires.
4. After labeling wires, remove wires from wire terminals.
5. Remove the existing thermostat base from the wall.
6. Refer to the following section for instructions on how to install this thermostat.

To Install Thermostat

⚠️ ELECTRICAL SHOCK HAZARD - Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat.

IMPORTANT: Thermostat installation must conform to local and national building and electrical codes and ordinances.

Note: Mount the thermostat about five feet above the floor. Do not mount the thermostat on an outside wall, in direct sunlight, behind a door, or in an area affected by a vent or duct.

1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker off.
2. To remove the cover, pull gently at the seam at the top.
3. Place the thermostat base against the wall where you plan to mount it, ensuring wires will feed through the wire opening in the base.
4. Mark the placement of the mounting holes.
5. Set the thermostat base and cover away from the working area.
6. Using a 3/16" drill bit, drill holes in the marked places for mounting.
7. Use a hammer to tap supplied anchors into the mounting holes.
8. Align the thermostat base with the mounting holes and feed the control wires through the slit in the thermal intrusion barrier and into the wire opening.
9. Use supplied screws to mount the thermostat base to the wall.
10. Insert stripped, labeled wires into matching wire terminals.
11. Be sure exposed portions of wires do not touch other wires.
12. Gently tug each wire to ensure proper connection. Double-check that each wire is connected to the proper terminal.
13. Turn on power to the system at the main service panel.
14. Configure the thermostat (see Configuration Mode section) to match your system type.
15. Replace the cover on the thermostat by snapping it in place.
16. Test thermostat operation as described in the "Testing the Thermostat" section.

Wiring Diagrams

The document includes diagrams for various hardwired configurations:

• Hardwired 5-Wire, Single Transformer (for Heating Only, Cooling Only, and Heating/Cooling)
• Hardwired 5 or 6-Wire, Single Transformer
• Hardwired 6-Wire, Two Transformer (requires both transformers to be in phase)
• Hardwired for Heat Pump with Cool or Heat Active Reversing Valve

Important Note: Before wiring, remove the pre-installed RC/RH jumper.

Remote or Outdoor Sensor Installation (Optional)

To install an optional remote or outdoor sensor (e.g., ACC-RT104):

1. Remove the cover from the remote sensor housing.
2. Select an appropriate mounting location for the remote sensor.
3. Mount the remote sensor unit using the provided hardware.
4. Install two-strand shielded wire between the remote sensor and the thermostat. Shielded wire is mandatory. Do not run remote sensor wire in conduit with other wires.
5. Wire 1 connects the S1 terminal on the thermostat to the S1 terminal on the remote sensor.
6. Wire 2 connects the S2 terminal on the thermostat to the S2 terminal on the remote sensor.
7. Connect the shielding of the wire to the S2 terminal on the thermostat.
8. Configure the thermostat to operate with the remote sensor using Configuration Mode Setting 10.

Note: Remote or outdoor sensor readings can be displayed by simultaneously pressing the [Down] and [SYS] buttons.

Configuration Mode

The configuration mode allows you to set the Daikin thermostat to match your specific heating and cooling system, including heat pump, air conditioning, gas, oil, or electric heat systems.

Entering Configuration Mode

1. Ensure the Daikin thermostat is in the OFF mode by pressing the [SYS] [Left] button until OFF displays.
2. Remove the thermostat cover by gently pulling near a top corner.
3. Press the [CONFIG] button for 1 second while the thermostat is in OFF mode.

Use the [Up] / [Down] buttons to change settings within each screen and the [Right] button to advance to the next screen. Pressing the [Left] button returns to the previous screen. To exit configuration mode, press the [CONFIG] switch for 1 second.

Configuration Mode Settings

1. Temperature Scale

Choose between Fahrenheit (°F) or Celsius (°C). Press [Up] or [Down] to select, then [Right] to advance.

2. Temperature Differential

Set the number of degrees between your "setpoint" temperature and your "turn on" temperature (0.5°C to 2.5°C or 1°F to 5°F). Press [Up] or [Down] to set, then [Right] to advance.

3. Deadband

Set the minimum degrees between your heat setpoint and cool setpoint in Autochangeover mode (1°C to 5°C or 1°F to 9°F). Press [Up] or [Down] to set, then [Right] to advance.

4. System Type

Configure settings for heat pump, non-heat pump, reversing valve operation, number of compressors, and type of heat (Gas/Oil or Electric).

• Heat Pump:
  • Reversing Valve Active: O (Cool Active) or B (Heat Active)
  • Number of Compressors/Stages: 1
  • Type of Heat: Heat Pump
• Non-Heat Pump:
  • Type of Heat: Gas/Oil or Electric

Press [Up] or [Down] to select options, then [Right] to advance.

5. Lockout

Select the degree range for set temperature changes during keypad lockout (0-8°), or choose NITE or COOL-HEAT lockout options. COOL-HEAT lockout allows adjustments up to the maximum heat set temperature and down to the minimum cool set temperature. Note: Mode cannot be changed when locked. Press [Up] or [Down] to select, then [Right] to advance.

6. Maximum Heat Setpoint

Adjust the maximum allowable heat set temperature (7°C to 32°C or 45°F to 90°F). Press [Up] or [Down] to select, then [Right] to advance.

7. Minimum Cool Setpoint

Adjust the minimum allowable cool set temperature (7°C to 32°C or 45°F to 90°F). Press [Up] or [Down] to select, then [Right] to advance.

8. Room Temperature Offset

Calibrate the displayed room temperature to match the actual room temperature (+5°C to -5°C or +9°F to -9°F). When set to other than 0, a 'o' symbol will display. Press [Up] or [Down] to select, then [Right] to advance.

9. Maximum Cycles Allowed Per Hour

Set the maximum number of heating/cooling cycles per hour (-- for as many as needed, 2-6 for specific limits). Press [Up] or [Down] to select, then [Right] to advance.

10. Temperature Sensor

Select the temperature sensor to use:

1. Only on-board sensor determines room temperature.
2. Only remote sensor determines room temperature.
3. Average temperature of on-board and remote sensor.
4. On-board sensor used until NITE period, then remote sensor is used.

Press [Up] or [Down] to select, then [Right] to advance.

11. Cooling Fan Delay Off Time

Select the fan purge time for cooling (0, 30, 60, 90 seconds). Press [Up] or [Down] to select, then [Right] to advance. Note: The control board provides a minimum 30-second fan off delay.

12. Status Indicator Light

Configure the status indicator light: 0 = never on, 1 = on with first stage. Press [Up] or [Down] to select. Press [CONFIG] for 2 seconds to exit.

Mode of Operation

The Daikin thermostat is a programmable, manual or auto changeover thermostat for single-stage heat and single-stage cool systems. It functions with air conditioning, heat pumps, gas, oil, or electric heat systems. The thermostat activates heating when room temperature is below the heat setpoint (plus differential) and cooling when above the cool setpoint (minus differential). A 4-minute delay protects compressors after they turn off.

Operating Modes

There are five possible operating modes:

• OFF Mode: No heating or cooling devices are activated. The fan can be manually controlled.
• Heat Mode: Controls the heating system. A flame icon (?) appears on the display when heating is active.
• Cool Mode: Controls the cooling system. A snowflake icon (❄️) appears on the display when cooling is active.
• Heat & Cool Mode (Auto Changeover): Controls both heating and cooling systems, automatically switching between them as needed. The clock display alternates with the set temperature display.
• Program Mode: The thermostat operates automatically based on the set program schedule (indicated by 'PROG'). This mode can be combined with Heat, Cool, or Heat & Cool modes. The program schedule can be temporarily overridden by adjusting the set temperature; it will resume after 2 hours.

Testing the Thermostat

⚠️ CAUTION: Do not energize the air conditioning system when the outdoor temperature is below 50°F (10°C). This can result in equipment damage or personal injury.

Heat Test

1. Press the [SYS] [Left] button until Heat mode is displayed.
2. Adjust the set temperature to be 5°F (3°C) above the room temperature.
3. Heat should activate within seconds. The red indicator light may turn on.
4. Adjust the set temperature to be 2°F (1°C) below the room temperature; heat should turn off.

Note: For heat pumps, there is a 4-minute delay to protect the compressor after it turns off. To bypass this delay, switch to OFF mode for 5 seconds.

Cool Test

1. Press the [SYS] [Left] button until Cool mode is displayed.
2. Adjust the set temperature to be 5°F (3°C) below the room temperature.
3. The A/C should activate within seconds. The green indicator light may turn on.
4. Adjust the set temperature to be 2°F (1°C) above the room temperature; the A/C should turn off.

Note: There is a 4-minute delay to protect the compressor after it turns off. To bypass this delay, switch to OFF mode for 5 seconds.

Fan Test

1. Press the [FAN] [Right] button. The fan display will appear, and the indoor fan will turn ON.
2. Press the [FAN] [Right] button again. The indoor fan will turn OFF.

Programming

Setting the Time and Day of the Week

Accurate time and day settings are crucial for the program schedule to operate correctly.

1. Press the [SYS] [Left] button until OFF mode is displayed.
2. Press and hold the [PROG] button (simultaneously press [SYS] [Left] and [FAN] [Right] buttons) for 6 seconds.
3. The hour will flash. Press [Up] or [Down] to adjust the hour.
4. Press the [FAN] [Right] button once to select minutes (minutes will flash). Press [Up] or [Down] to adjust the minutes.
5. Press the [FAN] [Right] button once to select the day of the week (TODAY will flash). Press [Up] or [Down] to select the current day of the week.

Note: At any time, press [SYS] [Left] to return to the previous screen or [FAN] [Right] to advance to the next screen.

Press and hold the [PROG] button for 2 seconds to save settings and return to OFF mode, or press [FAN] [Right] once to enter programming.

Program Overview

The Daikin thermostat offers four customizable periods per day: MORN, DAY, EVE, and NITE. Each period can have a specific start time, heat temperature, cool temperature, and programmable fan option. The thermostat tracks the day and time to maintain these programmed conditions.

Setting the Program Schedule

1. Press the [SYS] [Left] button until OFF mode is displayed.
2. Press and hold the [PROG] button (simultaneously press [SYS] [Left] and [FAN] [Right] buttons) for 6 seconds.
3. Press the [FAN] [Right] button 3 times.
4. The days of the week (SUN thru SAT) will blink. You have two options:
   • Press [FAN] [Right] to begin programming all 7 days simultaneously.
   • Press [Up] to see other programming options (individual day programming).

Note: The days shown on the display will be programmed simultaneously.

From the programming screen, press [FAN] [Right] to begin entering the schedule. The MORN period will blink.

• Use [Up] or [Down] to select a period (MORN, DAY, EVE, NITE).
• Press [FAN] [Right] to advance. The transition time hour will blink. Use [Up] or [Down] to select the hour.
• Press [FAN] [Right] to advance. The transition time minutes will blink. Use [Up] or [Down] to select the minutes.
• Press [FAN] [Right] to advance. The heat set temperature will display. Use [Up] or [Down] to adjust.
• Press [FAN] [Right] to advance. The cool set temperature will display. Use [Up] or [Down] to adjust.
• Press [FAN] [Right] to advance. The programmable fan screen will display. Use [Up] or [Down] to select: Off (disabled) or On (continuous).

Note: Programmable fan operates in Program mode only.

Repeat these steps to program all four periods for each day. When complete, press and hold the [PROG] button for 2 seconds to save and return to OFF mode.

Factory Preprogramming

The thermostat comes with a default schedule:

Personal Program Schedule

Use the following table to record your custom program settings:

SimpleSet™ Field Programming

This feature requires the SimpleSet™ Transfer Cable (Part No. 668817901) and is used for transferring configuration and program schedules from a master thermostat to target thermostats.

Preparing the Master Thermostat to Send Data

1. Ensure the master thermostat is powered with 24 VAC.
2. Verify the master thermostat is in OFF mode by pressing the [SYS] [Left] button until OFF displays.
3. Remove the master thermostat cover by gently pulling near a top corner.
4. Press the [Up] and [Down] buttons and the [CONFIG] switch simultaneously for 5 seconds.
5. The 'OUT' screen will display, indicating the master thermostat is ready to transfer data.

Note: Pressing the [Up] and [Down] buttons and [CONFIG] switch simultaneously for 5 seconds again will exit data transfer mode and return the master to OFF mode.

7. Turn off power to the master thermostat and remove it from the wall.
8. Connect the master to the target thermostat using the 3-wire connector. Attach one end to the Master's FP pins and the other end to the Target's FP pins.

Note: The target thermostat must be powered with 24 VAC for field programming to occur.

When the connection is made correctly, the master thermostat will power up, and the target will count down from 5 to 1, then display 'LOCK' to confirm data has been saved.

After completing all target thermostats, reinstall the master thermostat. Press the [Up] and [Down] buttons and the [CONFIG] switch simultaneously for 5 seconds to exit data transfer mode and return the master thermostat to OFF mode.

Troubleshooting

Daikin Training and Development

For training information on all Daikin HVAC products, please visit www.DaikinApplied.com and click on Training, or call 540-248-9646 and ask for the Training Department.

Warranty

All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local Daikin Representative for warranty details. Refer to Form 933-430285Y. To find your local Daikin Representative, go to www.DaikinApplied.com.

Aftermarket Services

To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787). To find your local service office, visit www.DaikinApplied.com or call 800-432-1342.

This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.DaikinApplied.com.

Products manufactured in an ISO certified facility.

Date: 10-15-13