Daikin 910121746 Installation, Operation & Application Manual

Non-Programmable Electronic Thermostat
2 Heat/2 Cool, Auto Changeover, Hardwired
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

Parts Diagram

Configuration
S1 S2 R
switch
RESET CONFIG
Reset switch

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: 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

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
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

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.
Up button
Down button
Right (fan) button
C Y1 W2 Y2 G
Room temperature
offset activated
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".

Wiring Diagrams

A
L
S1
S2
R
C
W1
Y1
W2
Y2
G
O
ICM ICM
Thermostat Thermostat
Terminal Terminal
Remote Sensor Installation (Optional)
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).

Terminal Designator Descriptions

R – 24 VAC hot W 1 – 1st stage heat
C – 24 VAC common Y 1 – 1st stage cool
910121746 Output Chart
Heat/Cool
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.

Configuration Mode

The configuration mode is used to set the 910121746 to match your heating/cooling system. To configure the
910121746, perform the following steps:
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.
3. Press the CONFIG button for 1 second while the 910121746 is in OFF mode.
Press the up or down button to change settings within each screen.
Press the right button to advance to the next screen.
Note: Pressing the left button will return you to the previous screen.
To exit configuration mode, press the CONFIG switch for 1 second.
WSHP Main Control Board
Terminals TB1 and TB2
TB2
C C
O O
G G
Y1 Y1
Y2 Y2
W1 W1
W2 W2
A A
R R
TB1
5
4
3
2
1
Remote Sensor:
(Contact Daikin for optional remote sensor.)
Note: Remote or outdoor sensor reading can be
displayed by simultaneously pressing the
Down and SYS buttons.
W 2 – 2nd stage heat G – Fan L – Status input
Y 2 – 2nd stage cool A – Alarm input O – Override/reset
1 Cool 2 Cool 1 Heat
ST ND ST
Y1 YI, Y2 W1
CONFIG
Up button
Down button
Left Right
button button
2 Heat
ND
W1, W2
OFF
S1 S2 R C W Y1 W2 Y2 G W3
FP O/B
RESET CONFIG