Aube Technologies TH146-P-DE Configuration, 2.4 24 V Transformer, 2.5 RC845 Relay, Humidifier

•Controller terminal L to heat pump terminal L

•Controller terminal W to heat pump terminal W (see section 2.5)

•Controller terminal G to heat pump terminal G (see section 2.5)

2.4 24 V Transformer

You might need a 24 V transformer if you have an add-on installa- tion. Connect the transformer to the controller terminals R and C (24 Vac In).

2.5 RC845 Relay

If you have an add-on installation, you might need a relay such as Aube’s RC845 to connect the furnace (auxiliary heating) and its fan to the controller. Install the relay near the control module. Connect the wires of the RC845 relay as follows:

•relay terminals W, G and C to controller terminals W, 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.

2.6 Humidifier

Connect the humidifier to controller terminals C and H (no polarity).

2.7 Outdoor Sensor (AC144-03)

The outdoor sensor is required for the following:

•balance points

•automatic humidity control

•outdoor temperature display

•defrost point

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 wire length is 30 m (100 feet).

2.8 Plenum Sensor (AC146-410)

The plenum sensor measures the temperature inside the plenum. This data is required for high pressure protection during the defrost cycle (see section 4.3).

NOTE: The plenum sensor is generally needed for add-on installa- tions 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 sen- sor.

NOTE: The maximum wire length is 30 m (100 feet).

2.9 Dual-energy Input

The dual-energy input can be connected to the dual-register meter equipped with a normally open (NO) dry contact. Connect the termi- nals DE and CC of the controller to the terminals (yellow and red wires) of the dual-register meter.

When the contact is open, the heat pump and auxiliary heating operate as usual. The contact closes when the outdoor temperature drops below the set threshold. When the contact is closed, the heat pump is disabled and only the auxiliary heat can be used.

2.10 Unoccupied Mode Input

To use the unoccupied mode, the controller requires a remote con- trol device such as Aube’s telephone controller CT241 equipped with a dry-contact output (normally open). The unoccupied mode is activated when the contact closes. (See section 6.4.)

2.11Wiring Table

24 Vac In	R	Power; 24 Vac
	C
Thermostat	TH	Console connection
	TH
Plenum	PS	Plenum temperature sensor connection
Sensor	CS
Outdoor	OS	Outdoor temperature sensor connection
Sensor	CS
Dual Energy	DE	Dual energy connection
	CC	(requires a normally open contact)
Unoccupied	UN	Unoccupied mode connection
	CC	(requires a normally open contact)
	R	Power; 24 Vac / 3 A
	C
	Y	Output; 24 Vac / 1 A (compressor)
Heat Pump	O/B	Output; 24 Vac / 1 A
		(reversing valve; energized on cool)
	WW	Input; 24 Vac / 2 mA (defrost)
	L	Input; 24 Vac / 2 mA (fault)
Aux. Heat	W	Output; 24 Vac / 1 A (auxiliary heat and fan)
	G
Humidifier	C	Output; 24 Vac / 1 A
	H

3. Configuration

3.1 Switch Configuration

To access the 2 configuration switches, loosen the captive screw under the console and separate the console from its base by pulling the bottom section.

3.1.1Keypad Lock (SW1)

I:The keypad is locked. Settings cannot be changed.

O:The keypad is unlocked.

3.1.2Access Mode (SW2)

INST: Installer mode. Gives access to all configuration parameters.

TH146-P-DE 400-280-004-C 11/29/06 2/9