Daikin 668811101 General instructions

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 thermostat + 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

Mode of Operation
The Daikin 668811101 thermostat is a programmable, auto changeover, single stage heat, single stage cool
thermostat. It functions with air conditioning, heat pumps, gas, oil or electric heat systems.
The thermostat activates the heating appliance when the room temperature is below the set heat temperature (by
the differential temperature) and the red indicator light on the thermostat will light. The Daikin 668811101 thermostat
will stop outputting and the red light will turn off when the call for heat has been satisfied. With heat pumps, the
thermostat will not let the compressor come on for 4 minutes after it turns off. This protects your compressor.
When the room temperature is greater than the set cool temperature (by the differential temperature), the cooling
device is activated and the green indicator light on the thermostat will turn on. The Daikin 668811101 thermostat will
stop outputting and the green light will turn off when the call for cooling is satisfied. The thermostat will not let the
compressor come on for 4 minutes after it turns off. This protects your compressor.
The Daikin 668811101 thermostat has five possible operating modes: OFF, Heat, Cool, Heat & Cool and Program
mode. In off mode, the thermostat will not turn on heating or cooling devices. The manual fan can be turned on in
all operating modes using the fan switch and the fan speed can be set in all operating modes using the fan speed
switch. In heat mode, the thermostat controls the heating system. In the Cool mode, the thermostat controls the
cooling system. In heat & cool mode, the thermostat controls both the heating and cooling systems. In program
mode, the thermostat will automatically be controlled by the set program. Program mode can function with heat
mode, cool mode or heat & cool mode. The clock display alternates with the set temperature display for heat & cool
mode.
The program schedule can be overridden by changing the set temperature ( or button). This puts the Daikin
668811101 thermostat thermostat into a 2 hour temporary hold. After 2 hours, it will automatically return to the
program schedule.
The Daikin 668811101 thermostat also has a button lockout feature. This enables the thermostat to be set to the
proper mode and temperature and locked so it cannot be tampered with.
Setting the Time and Day of the Week
The time and day of the week must be set for your program schedule to operate correctly.
1. Press the MODE button until you are in the OFF mode.
2. Press the PROG button in for 6 seconds. Time displays.
3. Press the or button to adjust the time.
4. Press the PROG button while the time is displayed. The display shows the day
currently set on the thermostat (1=Monday, 2=Tuesday, etc).
5. Press the or button to set the correct day of the week that today is.
Note: Press the PROG button in for 5 seconds to lock values into memory
and return to the OFF mode or press the PROG button once to enter
programming.
• Set time is displayed
8. Press the or button to change set time.
9. Press the PROG button to advance to the next screen.
Note: Transitions required after 11:59 PM must be programmed in the next day’s
MORN transition.
• Heat temperature is displayed (45°F to 90°F)
10. Press the or button to adjust heat set temperature.
11. Press the PROG button to advance to the next screen.
• Cool temperature is displayed (45°F to 90°F)
Note: Cool cannot be set lower than heat temperature.
12. Press the or button to adjust cool set temperature.
13. Press the PROG button to advance to the next screen.
Repeat steps 1-13 to program each day of the week individually or use the Simpleset®
feature to program every day the same as Monday.
Programming
Program Overview
The Daikin 668811101 thermostat programmable thermostat has four periods (MORN, DAY, EVE, NITE) that are
customizable for each day of the week. Each period will have a start time, heat temperature, and cool temperature.
The Daikin 668811101 thermostat monitors the day and time, while maintaining the specific conditions you have
chosen for each period in your program.
1. Press the MODE button until you are in the OFF mode.
2. Press the PROG button for 6 seconds.
3. Press the PROG button twice.
• Day is displayed (1-7)
4. Press the or button to change the day you want to program
(1=Monday, 2=Tuesday, etc.).
5. Press the PROG button to advance to the next screen.
Note: You can always press the MODE button to return to the
previous parameter.
• Period is displayed (MORN, DAY, EVE, NITE)
6. Press the or button to change period of day.
7. Press the PROG button to advance to the next screen.
Operating Modes
There are six possible operating modes for the Daikin 668811101 thermostat. Off, Cool, Heat, and Cool & Heat modes
are accessed by pressing the Mode button. Program mode is accessed by pressing the Prog button. Continuous fan
mode is accessed by setting the auto/on switch to ON.
Cool and Heat Mode (Auto Changeover) – In this mode, the thermostat
controls the cooling and heating systems, automatically changing over from one to the other
as needed.
Program Mode – In this mode, the program function is on (PROG displays), and the
thermostat will automatically be controlled by the set program schedule. Program mode can
function with heat mode, cool mode or heat & cool mode. The program schedule can be
overridden by changing the set temperature ( or button). After 2 hours, the program
schedule will automatically be resumed. To manually return to the program schedule, press
the PROG button twice.
Cool Mode
• In this mode, the thermostat controls the cooling system
Note: There is a four minute delay for your compressor to restart after it has turned off.
Heat Mode
• In this mode, the thermostat controls the heating system
Note: For heat pumps, there is a four minute delay for your compressor to restart after
it has turned off.
OFF Mode
• In this mode, the thermostat will not turn on the heat pump.
Continuous Fan Mode
• The indoor fan can be turned on manually in every operating mode by sliding the auto/on switch to ON.
MORN 6:00 AM DAY 8:00 AM EVE 6:00 PM NITE 10:00 PM
HEAT 70°F HEAT 62°F HEAT 70°F HEAT 62°F
COOL 78°F COOL 85°F COOL 78°F COOL 82°F
MONDAY
thru
SUNDAY
Factory Preprogramming
The Daikin 668811101 thermostat comes preprogrammed with the following schedule:
Simpleset® Programming
Lockout Function
After the complete Monday schedule is set (see Programming), you are at the Day 2 screen:
1. Press the button once. Day 1 screen displays.
2. Press and hold the button for 3 seconds.
• The days of the week will count down from 7 to 1 and this will lock the
settings into memory.
• Once the schedule is locked in, you can go through each day and make
any changes you require. This feature speeds up the programming of
the standard weekday/weekend schedule.
3. Press and hold the PROG button for 5 seconds to exit program mode and return to the OFF mode.
The Daikin 668811101 thermostat thermostat has a button lockout feature so the settings cannot be
changed or tampered with. With the lockout activated, any button press will result in “LOC” being displayed.
To activate the LOC function:
1. Press the MODE button and hold it in.
2. Also press the PROG button and keep both depressed for 10 seconds.
3. LOC will display and all buttons will be disabled.
To deactivate the LOC feature, repeat steps 1 & 2 above.
Simpleset® programming is a convenient method of programming the thermostat. Once the entire Monday (Day 1)
schedule is set, Simpleset® programming will copy the Monday schedule to every day of the week.
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
MONDAY
1
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
TUESDAY
2
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
WEDNESDAY
3
Personal Program Schedule
Use the following personal program schedule to record your settings:
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
THURSDAY
4
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FRIDAY
5
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
SATURDAY
6
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
SUNDAY
7
Troubleshooting
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24 VAC is not
present
System fan does not come on properly Verify wiring is correct
All thermostat buttons are inoperative Verify 24 VAC is present; unit locks out when 24 VAC is not present
No response with first button press First button press activates backlight only
Program schedule activates at the wrong
time
Check time (AM/PM) set on thermostat (see “Setting the Time”)
Thermostat turns on and off too frequently Adjust temperature differential (see “Configuration Mode Setting 2”)
Thermostat does not follow program Verify it is operating in program mode (PROG displays); check time
(AM/PM); check if in 2 hour program override
Fan runs continuously Check Fan On/Auto switch, fan runs continuously in On position
Status indicator light not on during call Turn status indicator function on
(see “Configuration Mode Setting 10”)
Room temperature is not correct Calibrate thermostat (see “Configuration Mode Setting 8”).
If remote sensor is used, check S1 and S2 terminal connections
LOC displays when any button is pressed Thermostat has the button lockout function activated (see “Lockout
Function”)
– – on display instead of room temperature Check for a bad connection at S1 and S2 terminals, if used
Problem not listed above Press Reset button once*
* Reset Button Function: Time, day and mode changed to last saved settings (saved after power loss or when
exiting program setup), configuration and program settings are unchanged.
When programming is complete, press and hold the PROG button in for 5 seconds to return to the OFF mode.
PROG must display on the screen for the thermostat to follow the program schedule. If PROG does not appear,
press the PROG button until PROG displays.
Daikin Training and Development
Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For
training information on all Daikin HVAC products, please visit us at 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.
LIAF015-206-30-15