Specifications
Electrical rating:
• 24 VAC (18-30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
Temperature control range:
55°F to 90°F (13°C to 32°C)
Accuracy:
± 1°F (± 0.5°C)
System configurations:
2-stage heat, 2-stage cool
Timing:
Anti-short Cycle: 4 minutes (bypass anti-short cycle delay by returning to OFF mode for 5 seconds)
Backlight Operation: 10 seconds
Terminations:
A, L, S1, S2, R, C, W1, Y1, W2, Y2, G, O
Package Contents/Tools Required
Package includes:
910121746
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
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
• 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
Icon Descriptions
Cooling operation icon
Fan operation icon
Heating operation icon
Room temperature
offset activated
Parts Diagram
Configuration
switch
Reset switch
Right (fan) button
Down button
Up button
S1 S2 R
C
G
Y1 W2 Y2
RESET
CONFIG
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 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 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 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.
Terminals S1 and S2 can be used for an indoor remote sensor.
The indoor remote sensor is used to read the indoor temperature
in a different location. This is beneficial when the thermostat is not
mounted in the ideal location. The remote sensor P/N is 910116773.
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 is recommended.
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 indoor sensor (see Configuration Mode setting 9).
Remote Sensor Installation (Optional)
Note:
Remote or outdoor sensor reading can be
displayed by simultaneously pressing the
Down
and
SYS
buttons.
Remote Sensor:
(Contact Daikin for optional remote sensor.)
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. Insert stripped, labeled wires in matching wire terminals.
CAUTION!
:
Be sure exposed portion of wires does not touch other wires.
11. Gently tug wire to be sure of proper connection. Double check that each wire is connected to the proper
terminal.
12. Turn on power to the system at the main service panel.
13. Configure thermostat to match the type of system you have.
14. Replace cover on thermostat by snapping it in place.
15. Test thermostat operation as described in “Testing the Thermostat”.
1
ST
Cool
2
ND
Cool
1
ST
Heat
2
ND
Heat
Heat/Cool
Y1
YI, Y2
W1
W1, W2
The
910121746
thermostat is configurable for all systems. The configuration directly affects the outputs.
Use the output chart to correctly configure and wire the thermostat to your system.
910121746 Output Chart
Configuration Mode
OFF
1. Verify the
910121746
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.
To exit configuration mode, press the
CONFIG
switch for 1 second.
Press the
up
or
down
button to change settings within each screen.
Down button
Up button
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
910121746
to match your heating/cooling system. To configure the
910121746
, perform the following steps:
3. Press the
CONFIG
button for 1 second while the
910121746
is in
OFF
mode.
CONFIG
S1 S2 R
C
W
O/B
G
Y1 W2
W3
Y2
RESET
CONFIG
FP
Wiring Diagrams
L
S1
S2
R
C
W1
Y1
W2
Y2
G
A
O
O
G
Y1
Y2
W1
W2
A
R
C
4
3
2
1
5
O
G
Y1
Y2
W1
W2
A
R
C
ICM
Thermostat
Terminal
TB2
TB1
ICM
Thermostat
Terminal
WSHP Main Control Board
Terminals TB1 and TB2
Terminal Designator Descriptions
R – 24 VAC hot
C – 24 VAC common
W1 – 1st stage heat
Y1 – 1st stage cool
W2 – 2nd stage heat
Y2 – 2nd stage cool
G – Fan
A – Alarm input
L – Status input
O – Override/reset
Daikin P/N (910121746)
• Configurable
• 2-Stage Heat/2-Stage Cool Systems
• Large Display With Backlight
• Selectable Fahrenheit or Celsius
• Status Indicator Light
• Relay Outputs
(minimum voltage drop in thermostat)
• Remote Sensor Compatible
Installation, Operation & Application Guide
Version B: 10-15-13
2 Heat/2 Cool, Auto Changeover, Hardwired
Non-Programmable Electronic Thermostat
