TH146-N-U 2/12
Choose a location about 1.5 m (5 ft) above the floor on an
inside wall.
Loosen the captive screw under the console.
Detach the console from its base by pulling the bottom section.
Secure the base using the wall anchors and screws.
Connect the console to controller terminals TH and TH (no
polarity).
The terminals used to connect the heating/cooling system depend
on the type of system. See the appropriate wiring table on page 4.
If you have an add-on installation, you might need an RC845 relay
to connect the furnace (auxiliary heat) and its fan to the controller.
Install the relay near the control module and connect the wires as
follows:
• relay terminals W, G and C to controller terminals W1, G and C.
• relay terminals T and T to the appropriate furnace terminals: T
and T (oil); TH and TH (gas); R and W (electric).
NOTE: Refer to the relay’s installation instructions for more details.
If you have a 3H1C or 4H2C heat pump, a second RC845 relay
might be required to connect the second auxiliary heat.
Connect the humidifier in series with the power supply between
controller terminals H and H (dry contact).
Connect the dehumidifier or air exchanger in series with the power
supply between controller terminals D and D (dry contact).
The outdoor sensor is required for the following:
• outdoor temperature display
• balance points (heat pumps only, see section 4.2)
• defrost point (heat pumps only, see section 4.3)
• automatic humidity control (see section 5.5)
When installing the sensor, observe the following guidelines:
• Avoid locations where the sensor can be covered with snow
or exposed to direct sunlight.
• Avoid air outlets and concealed chimneys or stove pipes.
Install the sensor using its mounting clip and connect it to controller
terminals OS and CS (no polarity).
NOTE: The maximum wiring length is 30 m (100 ft).
The plenum sensor is required for the following:
• low temperature limit inside the plenum (HVAC only)
• high temperature limit inside the plenum (HVAC only)
• fan limit if gas heating is used (HVAC only)
• high pressure protection during defrost cycle (This protection
is generally needed for add-on installations only. It is not
needed if the heat pump is not connected to the controller
terminal WW.)
Install the sensor on the side of the plenum and
position it such that its aperture faces the air flow.
Connect the sensor to controller terminals PS
and CS (no polarity). For more information, refer
to the instructions provided with the sensor.
NOTE: The maximum wiring length is 30 m (100
ft).
NOTE: The dual-energy input can be used only with a heat pump
equipped with auxiliary heat.
The dual-energy input can be connected to the dual-register meter
equipped with a normally open (NO) dry contact. Connect the con-
troller terminals DE and CC to the meter terminals (yellow and red
wires).
The contact closes when the outdoor temperature drops below the
temperature setting on the meter. When the contact is closed, the
heat pump is disabled and only the auxiliary heat can be used.
To use the unoccupied mode, the controller requires a remote con-
trol device such as Aube’s CT241 telephone controller equipped
with a normally open (NO) dry contact placed between terminals UN
and CC of the controller. The unoccupied mode is activated when
the contact closes. (See section 5.6.)
To access the configuration switches, loosen the captive screw
under the console and separate the console from its base by pulling
it from the bottom part.
3.1.1 Backlight (SW1-1)
BL ON: The screen is always backlit.
AUTO: The screen is backlit only when a button is pressed. The
backlight remains on for 12 seconds.
3.1.2 Access Mode (SW1-2)
INST: Installer mode. Gives access to all configuration parameters.
NOTE: In installer mode, the short-cycle protection is disabled
and the interstage delay is reduced to 1 minute.
USER: User mo de. Gives access to configuration parameter 17
(humidity setpoint or humidity offset) only.
3.1.3 Keypad Lock (SW1-3)
I: The keypad is locked. Settings cannot be changed.
O: The keypad is unlocked.
Place the console in Installer mode (INST) using the SW1-2 switch
on the back of the console.
Press the Mode button for 3 seconds to access the configuration
menu (see page 8). The first menu item (parameter) is displayed.
To view another menu item, briefly press the Mode button.
To modify a parameter, press either button.
To exit the configuration menu, press .
Return the console to User mode (USER).
2.3 Heating/Cooling System
2.4 RC845 Relay
2.5 Humidifier
2.6 Dehumidifier / Air Exchanger
2.7 Outdoor Sensor (AC144-03)
2.8 Plenum Sensor (AC146-410)
2.9 Dual-energy Input
2.10 Unoccupied Mode Input
3. Configuration3.1 Configuration Switches
3.2 Software Configuration