Package Contents/Tools Required
Package includes:
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/VDC applications only; do not use on voltages over 30 VAC/VDC
• Do not short across terminals of 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
• Use this thermostat only as described in this manual
Specifications
Electrical rating:
• 24 VAC/VDC (18-30 VAC/VDC)
• 1 amp maximum per terminal
• 4 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:
2-stage heat, 2-stage cool
Timing:
Backlight Operation: 13 seconds after mode change or button press
Terminations:
-C, +R, W1, Y1, W2, Y2, G, O, S1, S2
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, insert and twist a coin or screwdriver in the slots on the sides of the thermostat.
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 wire opening.
9. Use supplied screws to mount thermostat base to wall.
10. Insert stripped, labeled wires in matching wire terminals. See “Wiring Diagrams” section of this
manual.
CAUTION!
:
Be sure exposed portion of wires does not touch other wires.
11. 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.
12. Seal hole for wires behind thermostat with non-flammable insulation or putty.
13. Replace cover on thermostat by snapping it in place.
14. Turn on power to the system at the main service panel.
15. Test thermostat operation as described in “Testing the Thermostat”.
Terminal Designator Descriptions
Parts Diagram
R12
W1 Y1 W2
O
S1
S2
668375401
Y2
Backlit Display
Reset
Configuration Switches
Mode Switch
Fan Switch
Configuration Mode
The configuration mode is used to set the Daikin Auto-changeover Electronic Thermostat to match
your heating/cooling system. To configure the Daikin Auto-changeover Electronic Thermostat, perform
the following steps:
1. Remove the cover of the thermostat by gently pulling on one of the corners.
2. Simultaneously hold the
SW5
and
SW6
buttons in for 5 seconds while the Daikin Auto-changeover
Electronic Thermostat is in
OFF
mode.
3. Press the or button to change settings within each screen.
4. Press the
SW6
button to advance to the next screen.
Note:
The
SW5
button will return you to the previous screen.
5. To exit configuration mode, slide the
Mode
switch to
Heat
or
Cool
.
FILTER
DIFF
ROOM
SET
REMOTE
Configuration Mode Settings
The setup screens for Configuration Mode are as follows:
1.
Heat Pump and Non Heat Pump –
Press the or button to configure as
heat pump, or non-heat pump system. Set to “O” for all Daikin WSHP, PTAC,
PTHP and UV units.
Press the
SW6
button to advance to the next screen.
FILTER
DIFF
ROOM
SET
REMOTE
2. Set to “g”.
Press the or button to set to “g”.
Press the button to advance to the next screen.
FILTER
DIFF
ROOM
SET
REMOTE
3.
Temperature Scale (F or C) –
Choose Fahrenheit or Celsius.
Press the or button to select.
Press the
SW6
button to advance to the next screen.
-C – 24 VAC/VDC common
+R – 24 VAC/VDC hot
W1 – 1st stage heat
Y1 – 1st stage cool
Remote Sensor Installation (Optional)
Requires Daikin Remote Sensor Part Number 667720401
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.
FILTER
DIFF
ROOM
SET
REMOTE
FILTER
DIFF
ROOM
SET
REMOTE
5.
2
nd
Stage
Temperature Differential
(1°F to 6°F) (0.5°C to 3.0°C)
Set the number of degrees between when stage 1 turns on and
when stage 2 turns on.
Press the or button to set differential value.
Press the
SW6
button to advance to the next screen.
FILTER
DIFF
ROOM
SET
REMOTE
FILTER
DIFF
ROOM
SET
REMOTE
4.
1
st
Stage
Temperature Differential
(1°F to 3°F) (0.5°C to 1.5°C)
Set the number of degrees between your “setpoint” temperature
and your “turn on” temperature.
Press the or button to set differential value.
Press the
SW6
button to advance to the next screen.
W2 – 2nd stage heat
Y2 – 2nd stage cooling
G – Fan
O – Override
Wiring Diagram
24 VAC Common
Tenant Override
Fan
Cool 1
Cool 2
Heat 1
Heat 2
Alarm Output
24 VAC
C
O
G
Y1
Y2
W1
W2
A
R
Override (Optional)
Thermostat
Terminals
TB2
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
Non-Programmable, Auto or Manual Changeover (P/N 668375401)
Two Stage Heat/Two Stage Cool, Night Setback and Override Feature
Note: An additional conductor is required between “O” terminals for the override
feature to work.
Installation, Operation & Application Guide
Version B: 10-15-13
Daikin P/N (668375401)
2 Heat/2 Cool, Auto or Manual Changeover, Hardwired
Non-Programmable Electronic Thermostat
• Configurable
• Two Stage Heat / 2 Stage Cool
Systems
• Backlit Display
• Field Temperature Calibration
• Status Indicator Light
• Relay Outputs (minimum voltage drop
in thermostat)
• Night Set-Back Override
• Reset
