Aube Technologies TH146-N-U User Manual

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TH146-N-U

Installation Guide

Non-programmable H/C Controller

Removable	Removable
Connector *	Connector *

		AC144-03 Outdoor
	TH146 User Console	Temperature Sensor
	TH146 User Console	CT280-3H3C Control Module
		CT280-3H3C Control Module

* To remove a connector from the control module, pry with a screwdriver.

1. Introduction

1.1 Applications

The TH146-N-U electronic controller can be used with any of the following heating/cooling systems:

	Heat pump	1H1C, 2H1C, 2H2C, 3H1C, 3H2C, 3H3C, 4H2C

	HVAC	1H, 2H, 3H, 1C, 2C, 3C, 1H1C, 1H2C, 2H1C, 2H2C,
	HVAC	2H3C, 3H1C, 3H2C, 3H3C
		2H3C, 3H1C, 3H2C, 3H3C

The following devices can be connected to the controller:

air recirculation fan

humidifier

dehumidifier or air exchanger

dual-register meter (dual energy)

remote control device (for the unoccupied mode)

1.2 Supplied Parts

•CT280-3H3C control module

•TH146 console with two wall anchors and mounting screws

•AC144-03 outdoor temperature sensor (3 m or 10 ft) with mounting clip (see section 2.7)

1.3 Accessories

•RC845 relay (see section 2.4)

•AC146-410 plenum temperature sensor (see section 2.8)

•CT241 telephone controller (see section 2.10)

2. Installation

2.1 Control Module (CT280-3H3C)

Configure the control module according to your type of heating/cooling system using DIP switches on the back of the module.

Heat pump

HVAC

Install the control module near the heating/cooling system, away from any heat source.

2.2 User Console (TH146)

Install the console in a central location. Avoid locations with air drafts (e.g., top of staircase or air outlet) or stagnant air (behind a door). Do not install the console on a wall hiding air ducts nor expose it to direct sunlight.

NOTE: If this controller replaces an old thermostat, any two of the wires that were connected to the thermostat can be used to connect the user console to the control module. The maximum wiring length is 30 m (100 ft).

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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).

2.3 Heating/Cooling System

The terminals used to connect the heating/cooling system depend on the type of system. See the appropriate wiring table on page 4.

2.4 RC845 Relay

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.

2.5 Humidifier

Connect the humidifier in series with the power supply between controller terminals H and H (dry contact).

2.6 Dehumidifier / Air Exchanger

Connect the dehumidifier or air exchanger in series with the power supply between controller terminals D and D (dry contact).

2.7 Outdoor Sensor (AC144-03)

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).

2.8 Plenum Sensor (AC146-410)

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.)

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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).

2.9 Dual-energy Input

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 controller 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.

2.10 Unoccupied Mode Input

To use the unoccupied mode, the controller requires a remote control 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.)

3. Configuration

3.1 Configuration Switches

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.

3.1.2Access 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 mode. 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.

3.2 Software Configuration

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).

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4. Principles of Operation

4.1 Automatic Heating/Cooling Changeover

With automatic heating/cooling mode changeover, there’s no need to adjust the controller at every change of season or weather condition. The controller switches automatically between heating mode and cooling mode to maintain the desired temperature. The mode changeover is triggered as follows:

•The controller switches to cooling mode when the indoor temperature is higher than the setpoint by more than 1.5°C (2.5°F) for 15 minutes.

•The controller switches to heating mode when the indoor temperature is lower than the setpoint by more than 1.5°C (2.5°F) for 15 minutes.

4.2 Balance Points (heat pumps only)

Balance points are used to disable the heat pump or the auxiliary heating when the outdoor temperature is below or above a set temperature.

•When the outdoor temperature is below the balance point low (bP L), the heat pump is disabled and only auxiliary heating can be used (see page 8, item 2).

•When the outdoor temperature is above the balance point high (bP H), the auxiliary heat is disabled and only the heat pump can be used (see page 8, item 3).

NOTE: Balance Points cannot be used if the AC144-03 outdoor temperature sensor is not connected to the controller.

4.3 Heating During Defrost (heat pumps only)

The auxiliary heat is activated during defrost except under the following conditions:

•When the outdoor temperature is above the defrost point (see page 8, item 4). NOTE: This condition will not apply if the AC144-03 outdoor sensor is not connected to the controller.

•When the plenum temperature is above 40°C (104°F) for add-on installations only. The auxiliary heat is re-activated when the plenum temperature drops below 32°C (90°F).

NOTE: This condition will not apply if the AC146-410 plenum sensor is not connected to the controller.

NOTE: The auxiliary heat’s short-cycle protection is disabled during defrost.

4.4 Types of Heat Pump Installations

The controller can be configured for either of the following types of heat pump installations (see page 8, item 5).

•Add-on Installation: This type of installation is performed when adding a heat pump to an existing furnace. When the heat pump is installed, the furnace becomes the auxiliary heat source. In this type of installation, the indoor coils are usually installed downstream of the auxiliary heat source. When the controller is configured for an add-on installation, the heat pump is disabled during auxiliary heating to prevent overpressure.

•New Installation: In this type of installation, as there is not already a furnace, the auxiliary heat source is installed at the same time as the heat pump. In this type of installation, the indoor coils are located upstream of the auxiliary heat. When

the controller is configured for a new installation, the heat pump and the auxiliary heat can operate simultaneously.

4.5 Interstage Delay

Interstage Delay is the time allocated for the temperature to return to an acceptable value when it deviates too far from the setpoint. If this time has elapsed, the next heating or cooling stage is activated. The heating or cooling stage will be deactivated when the temperature returns to an acceptable value. The Interstage Delay is fixed at 4 minutes if the controller is configured for an HVAC system and is user-adjustable if it is configured for a heat pump (see page 8, item 6).

4.6 Low and High Temperature Limits

Low Temperature Limit (LLMT) and High Temperature Limit (HLMT) are used to keep the plenum from becoming too cold or too hot. During cooling, if the plenum temperature is lower than LLMT, a cooling stage is deactivated starting with the one that was last activated. If, after a while, the temperature is still too low, another cooling stage is deactivated and so on. Likewise, during heating, if the plenum temperature is higher than HLMT, a heating stage is deactivated starting with the one that was last activated. If, after a while, the temperature is still too high, another heating stage is deactivated and so on. (see page 8, items 7 and 8.)

WARNING: LLMT and HLMT can be used in parallel with an UL353-approved device but they do not replace such device.

NOTE: LLMT and HLMT cannot be used if the plenum temperature sensor is not connected to the controller.

4.7 Smart Fan

When Smart Fan is enabled (see page 8, item 12), the fan operates as follows:

•During the unoccupied mode (i.e., when you are away from home), the fan operates only when heating or cooling is activated.

•The fan operates continuously the rest of the time.

NOTE: For Smart Fan to work, set the fan to On (see section 5.2).

4.8 Automatic Humidification / Dehumidification Changeover

If a humidifier and a dehumidifier are both connected to the controller, the controller will automatically switch between the two devices to maintain the desired humidity level. The changeover occurs when the humidity deviates from the setpoint by more than 3% for 30 minutes.

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Wiring Tables

Heat Pump

Terminal

Device

1H1C

2H1C

3H1C

2H2C

3H2C

4H2C

3H3C

Console

Connect the console between the TH terminals (no polarity)

Plenum sensor

Connect the plenum sensor between the PS and CS terminals (no polarity)

Common S

Common terminal for the plenum sensor and the outdoor sensor

Outdoor sensor

Connect the outdoor sensor between the CS and OS terminals (no polarity)

Dual Energy

Connect the dual-register meter between the DE and CC terminals (no polarity)

Common C

Common terminal for the dual-energy meter and the unoccupied mode input

Unoccupied mode input

Connect a dry contact between the UN and CC terminals (no polarity)

Humidifier (24 Vac / 1 A)

Connect the humidifier between the H terminals (dry contact)

Dehumidifier (24 Vac / 1 A)

Connect the dehumidifier between the D terminals (dry contact)

Power (24 Vac)

Compressor 1 (24 Vac / 1 A)

Compressor 2 (24 Vac / 1 A)

Compressor 3 (24 Vac / 1 A)

Auxiliary heat 1 (24 Vac / 1 A)

Auxiliary heat 2 (24 Vac / 1 A)

W3/O/B

Reversing valve (24 Vac / 1 A)

Fan (24 Vac / 1A)

Fault (24 Vac / 5 mA)

Defrost (24 Vac / 5 mA)

Not used

HVAC

Terminal

Device

1H1C

1H2C

2H1C

2H2C

2H3C

3H1C

3H2C

3H3C

Console

Connect the console sensor between the TH terminals (no polarity)

Plenum sensor

Connect the plenum sensor between the PS and CS terminals (no polarity)

Common S

Common terminal for both plenum sensor and outdoor sensor

Outdoor sensor

Connect the outdoor sensor between the OS and CS terminals (no polarity)

Not used

Common C

Common terminal for the unoccupied mode input

Unoccupied mode input

Connect a dry contact between UN and R terminals (no polarity)

Humidifier (24 Vac / 1 A)

Connect the humidifier between the H terminals (dry contact)

Dehumidifier (24 Vac / 1 A)

Connect the dehumidifier between the D terminals (dry contact)

Power (24 Vac)

Cooling unit 1 (24 Vac / 1 A)

Cooling unit 2 (24 Vac / 1 A)

Cooling unit 3 (24 Vac / 1 A)

Heating unit 1 (24 Vac / 1 A)

Heating unit 2 (24 Vac / 1 A)

W3/O/B

Heating unit 3 (24 Vac / 1 A)

Fan (24 Vac / 1 A)

Not used

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