1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate
circuit breaker off.
2. Remove cover of 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 existing thermostat base from wall.
6. 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.
Important Safety Information
• 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
WARNING
Always turn off power at the main power supply before installing, cleaning, or removing thermostat.
Configuration switch
Reset switch
Left (system)
button
Right (fan)
button
Down button
Up button
Field programming pins
RC/RH Jumper
Fan switch
Parts Diagram
Icon Descriptions
Fan operation icon
Cooling operation icon
Heating operation icon
Specifications
Electrical rating:
• 24 VAC (18-30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
Temperature control range:
45°F to 90°F (7°C to 32°C)
Accuracy:
± 1°F (± 0.5°C)
System configurations:
1-stage heat, 1-stage cool, heat pump, gas, oil, electric
Timing:
Anti-short Cycle: 4 minutes
Backlight Operation
Terminations:
S1, S2, Y, W/O/B, G2, G1, RC, RH, C
Package Contents/Tools Required
Package includes: Daikin 668811101 programmable thermostat and Operation and Application
Guide.
Wiring Diagrams
Hardwired
5-Wire, Single Transformer
WARNING
Be sure exposed portion of wires does not touch other wires.
To Install 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.
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 cover, pull gently at the seam at the top.
3. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through
the wire opening in the base of the thermostat).
4. Mark the placement of the mounting holes.
5. Set thermostat base and cover away from working area.
6. Using a 3/16” drill bit, drill holes in the places you have marked for mounting.
7. Use a hammer to tap supplied anchors in mounting holes.
8. Align thermostat base with mounting holes and feed the control wires through slit in thermal
intrusion barrier and into wire opening.
9. Use supplied screws to mount thermostat base to wall.
10. For 2 transformer systems, remove and discard RC/RH jumper.
11. Insert stripped, labeled wires in matching wire terminals.
12. Gently tug wire to be sure of 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 thermostat to match the type of system you have.
15. Replace cover on thermostat by snapping it in place.
16. Test thermostat operation as described in “Testing the Thermostat”.
Configuration Mode
OFF
1. Verify the thermostat is in the
OFF
mode.
Press the
SYS
(left) button until off mode displays.
2. Remove the cover of the thermostat by gently pulling near one of the
corners at the top of the thermostat.
Press the
up
or
down
button to change settings within each screen.
Down
button
Up
button
To exit configuration mode, press the
CONFIG
switch for 1 second.
Press the
right
button to advance to the next screen.
Note:
Pressing the
left
button will return you to the previous screen.
Left
button
Right
button
The configuration mode is used to set the Daikin thermostat to match your heating/cooling system.
This thermostat functions with heat pump, air conditioning, gas, oil or electric heat systems.
To configure the thermostat, perform the following steps:
3. Press the
CONFIG
button for 1 second while the thermostat is in
OFF
mode.
S1 S2 Y
W
O/B
G RC RH C
RESET
CONFIG
RC
RH
FP
CONFIG
Hardwired
5 or 6-Wire, Single Transformer
Hardwired
5-Wire, Single Transformer
Configuration Mode Settings
2.
Temperature Differential
(1°F to 5°F) (0.5°C to 2.5°C)
Set the number of degrees between your “setpoint” temperature and your
“turn on” temperature.
Press the
up
or
down
button to set differential value.
Press the
right
button to advance to the next screen.
The setup screens for Configuration Mode are as follows:
1.
Temperature Scale
(F or C)
Choose Fahrenheit or Celsius.
Press the
up
or
down
button to select.
Press the
right
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 heat setpoint and your
cool setpoint in Autochangeover mode.
Press the
up
or
down
button to set deadband value.
Press the
right
button to advance to the next screen.
Choose
System
Reversing Valve
Active
Number of Compressors
or Compressor Stages
Type of
Heat
Heat Pump
HP
O
1
HP
b
1
Non-Heat
Pump
Heat
Gas
Heat
Electric
Press the
up
or
down
button to select.
Press the
right
button to advance to the next screen.
4.
System –
Set for heat pump, non-heat pump, reversing valve operation and number of
compressors in your system.
5.
Lockout
(0-8°, COOL-HEAT)
Select the number of degrees set temperature can be changed during
keypad lockout. 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
up
or
down
button to select.
Press the
right
button to advance to the next screen.
6.
Maximum Heat Setpoint
(45°F to 90°F) (7°C to 32°C)
Adjust to control the maximum heat set temperature allowed.
Press the
up
or
down
button to select.
Press the
right
button to advance to the next screen.
Daikin P/N (668811201)
Installation, Operation & Application Guide
Version B: 10-15-13
Non-Programmable Electronic Thermostat
• Configurable
• Single-Stage Heat/Cool Systems
• Single-Stage Heat Pump Systems
• Two Speed Fan Control
• Large Display With Backlight
• Selectable Fahrenheit or Celsius
• Compatible with Gas, Oil, or Electric
• SimpleSet™ Field Programming
• Status Indicator Light
• Relay Outputs (minimum voltage drop in thermostat)
• Remote Sensor Compatible
• Ideally Suited for:
– Residential (New Construction/Replacement)
– Light Commercial
1 Heat/1 Cool, Auto Changeover, Fan Speed Control, Hardwire
Remote or Outdoor Sensor Installation (Optional)
1. Remove cover from remote sensor housing. Required Daikin
Remote Sensor Part No. 667720401
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. Configure the thermostat to operate with the remote sensor (see Configuration Mode setting 10).
Note:
Remote or outdoor sensor reading can be displayed by simultaneously pressing the
Down
and
SYS
buttons.
Remote Sensor
