Specifications
Electrical Rating: • 24 VAC (18 to 30 VAC)
• 3 amp maximum total load
• 1 amp maximum per terminal
Temperature control ranges: 45°F to 90°F Accuracy: ± 1°F
System configurations: 1-stage heat, 1-stage cool, heat pump, gas, oil, electric
Timing: Anti-short Cycle: 5 minutes
Backlight Operation: 10 seconds
Terminations: C, RH, RC, W, Y, B, O, G1, G2, S1, S2
1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker
off.
2. Remove old thermostat. This should expose the wires.
3. Label the existing wires before removing wires.
4. After labeling wires, remove wires from wire terminals.
5. Refer to the following section for instructions on how to install this thermostat.
To Remove Existing Thermostat
WARNING
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.
To Install Thermostat
IMPORTANT: Thermostat installation must conform to local and national building and electrical codes and
ordinances.
1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker
off.
2. Insert stripped, labeled wires in matching wire terminals. See “Wiring Diagrams” section of this manual.
WARNING
Be sure exposed portion of wires does not touch other wires.
WARNING
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.
3. Tighten screws on terminal block. Gently tug wire to be sure of proper connection. Double check that each wire is
connected to the proper terminal.
4. Remove unused Gas/Electric jumper. Keep
gas for oil or gas systems. Keep electric for heat pumps or electric
heat systems.
5. Replace thermostat by snapping it in place.
6. Turn on power to the system at the main service panel.
7. Test thermostat operation as described in “Testing the Thermostat”.
Important Safety Information
WARNING
Always turn off power at the main power supply before installing, cleaning, or removing thermostat.
• This thermostat is for 24 VAC applications only; do not use on voltages over 30 VAC
• Do not short across terminals of 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
• Do not use air conditioning when the outdoor temperature is below 50 degrees; this can damage your A/C system
and cause personal injuries
• Use this thermostat only as described in this manual
Package Contents/Tools Required
Package includes: Daikin 668811101 programmable ther Operation & Application Guide.
Remote Sensor Installation (Optional)
1. Remove cover from remote sensor housing.
2. Select an appropriate location for mounting the remote sensor.
3. Mount remote sensor unit using hardware provided.
4. Install two strand shielded wire between remote sensor and thermostat. Shielded wire must be used. Do not run
remote sensor wire in conduit with other wires.
•
Wire 1 should run between the S1 terminal on the thermostat and the S1 terminal on the remote sensor
•
Wire 2 should run between the S2 terminal on the thermostat and the S2 terminal on the remote sensor
• Connect the shielding of the wire to the S2 terminal on the thermostat
5. Disable the main sensor (R12) on the thermostat by cutting it from the circuit board.
Wiring Diagram
6-Wire,
Configuration Mode
The configuration mode is used to set the Daikin 668811101 thermostat to match your heating/cooling system. The
Daikin 668811101 thermostat functions with heat pump, air conditioning, gas, oil or electric heat systems.
1. To enter the configuration mode, simultaneously hold down the and buttons while
the Daikin 668811101 thermostat is in OFF mode.
2. Press the or button to change settings within each screen.
3. Press the
PROG button to advance to the next screen.
Note: The
MODE
button will return you to the previous screen.
4. To exit configuration mode, hold the
PROG button for 6 seconds.
2. Differential (1°F - 5°F) (1°C - 3°C) – Set the number of degrees between your “turn on”
temperature and your “setpoint” temperature.
Press the or button to set differential value.
Press the
PROG button to advance to the next screen.
3. Deadband (1°F - 9°F) (1°C - 5°C) – Set the minimum number of degrees between
your heating system activation and your cooling system activation.
Press the or button to set deadband value.
Press the
PROG button to advance to the next screen
1. Temperature scale (F or C) – Choose Fahrenheit or Celsius.
Press the or button to select.
Press the
PROG button to advance to the next screen.
Configuration Mode Settings
4. Heat pump – Press the or button to configure as heat pump, or non-heat pump
system.
• ON = Heat pump system – 4 minute time delay with heat and cool
• OFF = Non-heat pump system – 4 minute time delay with cool only
Press the
PROG button to advance to the next screen
5. Lockout (0-8°, NITE, COOL-HEAT) – Select the number of degrees set temperature
can be changed during keypad lockout or select to lockout during NITE period only.
COOL-HEAT lockout allows adjustment of the set temperatures to the maximum heat set
temperature selected in Step 6 and minimum cool set temperature selected in Step 7.
Note: The mode cannot be changed when the thermostat is locked.
Press the or button to select.
Press the
PROG button to advance to the next screen
6. Maximum Heat Setpoint (45°F - 90°F) (7°C - 32°C)
Adjust to control the maximum heat set temperature allowed.
Press the or button to select.
Press the
PROG button to advance to the next screen
7. Minimum Cool Setpoint (45°F - 90°F) (7°C - 32°C)
Adjust to control the minimum cool set temperature allowed.
Press the or button to select.
Press the
PROG button to advance to the next screen
8. Room temperature offset (+9°F to - 9°F) (+5°C to -5°C).
Adjust to calibrate displayed room temperature to match actual room temperature.
Press the
PROG button to advance to the next screen.
9. Maximum compressor cycles allowed per hour (d, 2-6).
– – = as many as needed, 2-6 = maximum cycles/hour
Press the
PROG button to advance to the next screen.
ON
10. Status indicator light (ON, OFF).
Press the or button to select.
To exit configuration mode, press the
PROG button for 6 seconds.
Starting the Thermostat
Note: First button press activates backlight only.
1. Move the Fan Auto/On switch to the Auto position.
2. Press the
MODE button to enter desired operating mode.
3. Press
PROG to select program or non-program option.
Testing the Thermostat
Once the thermostat is installed, it should be thoroughly tested.
Cool Test
1. Press mode button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room temperature.
3. Air conditioning should come on. Green LED turns ON.
4. Adjust the set temperature 2 degrees above the room temperature and the A/C should
turn off. There may be a fan delay on your system.
Note: There is a four-minute time delay to protect the compressor after it turns off.
Heat Test
1. Press mode button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the room temperature.
3. Heat should come on. Red LED turns ON.
4. Adjust the set temperature 2 degrees below the room temperature and the heat
should turn off. There may be a fan delay on your system.
Note: For heat pumps, there is a four-minute delay to protect your compressor.
Fan Test
1. Slide fan switch to ON position.
Indoor fan turns ON.
2. Slide fan switch to Auto position.
Indoor fan turns OFF.
CAUTION
Do not energize the air conditioning system when the outdoor temperature is below 50 degrees.
It can result in equipment damage or personal injury.
Daikin P/N (668811101)
Installation, Operation & Application Guide
Version C: 06-30-15
Programmable Electronic Thermostat
• 7-Day Programmable
• Single Stage Heat Pump/Non-Heat Pump Systems
• Backlit Display
• Single Stage Heat/Cool Systems
• Two Speed Fan Control
• Field Calibration
• Auto Changeover
• Button Lockout Function
• SimpleSet™ Programming
• Remote Temperature Sensor Capability
• Title 24 Compliant / No Batteries Required
• Relay Outputs (minimum voltage drop in thermostat)
• Ideally Suited for:
– Residential (New Construction/Replacement)
– Light Commercial
7-Day Programmable, Auto Changeover, Fan Speed Control, Hardwire
