Thermostats for electric heating

Thermostats for oil/gas/electric furnaces and air conditioning

Switches

The TRIAC advantage (electric heating)

What is a TRIAC?
A TRIAC is an electronic switch inside the thermostat that turns a baseboard on or off. Because a TRIAC has no moving parts, it can operate on 15-second cycles. (Conventional, or mechanical thermostats, operate on 15-minute cycles.) This enables an Aube TRIAC thermostat to adjust the temperature as necessary every 15 seconds, virtually eliminating temperature swings. (With Aube TRIAC thermostats, the temperature stays 0.15C / 0.27F of setting.)

Aube TRIAC thermostats are 100% silent - there is no clicking sound as with conventional thermostats.

Ever heard your baseboards making crackling sounds? This happens when a baseboard starts heating after it has been off for a while and cooled down, a common occurrence when the baseboard is controlled by a thermostat operating on 15- or 30-minute cycles. Aube TRIAC thermostats operate on 15-second heating cycles, meaning baseboards stay warm (they aren't usually off for any significant length of time). This helps reduce the crackling noise.

Do these quick temperature adjustments (every 15 seconds) mean a shortened thermostat life?
No. In fact, since Aube TRIAC thermostats have no moving parts, they last much longer than conventional thermostats using mechanical relays.

What is the difference between TRIAC thermostats and conventional (mechanical) thermostats?
TRIAC thermostats are the most precise thermostats on the market (temperature stays within 0.15C / 0.27F of setting). This not only ensures total comfort (you are never too hot or too cold), but also saves energy. For example, if you set the thermostat to 21ºC, the room temperature will remain at 21ºC, and not dip to 19C. Unlike conventional mechanical thermostats, there is no need to set the temperature at 23C to ensure the temperature does not dip below 21C.

Which Aube thermostats are equipped with TRIACs?
Aube's TH104, TH104Plus, TH106, TH108, and TH109 have TRIACs.

Installation (electric heating)

How do I determine wire polarity?
All Aube two-wire thermostats are non-polarized-there is no polarity to respect during installation.

Three-wire thermostats: The R, C and W wires must be connected to the appropriate thermostat terminals.

Aube four-wire thermostats are polarized. Wires are colour-coded to ensure polarity is respected during installation. Your owner's guide and the diagram on the back of the thermostat also provide instructions on connecting the wires to ensure proper polarity is followed.

Can I control a fan-forced heater with a line voltage thermostat?
Yes. All Aube line voltage thermostats (except the TH108 and TH109) can control fan-forced heaters.

Does a line voltage thermostat have to be installed using an electrical box?
Yes. Depending on the model, the thermostat must be mounted on or inside a standard electrical box.

Can Aube thermostats handle their maximum wattage?
Yes. A safety margin is built into all Aube thermostats to ensure they can handle the maximum load listed on the thermostat's packaging. For TRIAC thermostats only, note that a minimum load of 2 A is required.

Can a thermostat control several baseboards?
Yes, so long as the total wattage of all baseboards does not exceed the thermostat's maximum load (line voltage thermostats) or the relay's maximum load (low voltage thermostats).

Should line voltage thermostats be installed by professionals?
Although these thermostats are relatively easy to install thanks to 2-wire non-polarized connections (TRIAC thermostats) and colour-coded wires (four-wire thermostats), we recommend that our line voltage thermostats be installed by a professional because of the importance of ensuring a good connection in the wire connectors.

Do Aube electric heating thermostats use batteries?
No.

How do I know if a thermostat is compatible with my heating system?
You first must determine the maximum wattage of your baseboard. If you intend to control more than one baseboard with a single thermostat, you should check the total wattage of all baseboards to ensure the combined wattage doesn't exceed the thermostat's maximum load (or relay's maximum load if using a low voltage thermostat).

Note that the Aube TH108 and TH109 are not compatible with fan-forced heaters. As well, all Aube TRIAC thermostats require a minimum load of 2 A.

Savings (electric heating)

Whats the difference between an electronic thermostat and the old thermostats I have on my walls?
Older thermostats are usually what are known as bimetallic or mechanical thermostats. These thermostats use a metal coil (made by laminating two different types of metal together) that expands and contracts as a room heats or cools. As a room cools, for example, the coil contracts and trips a switch that turns on a baseboard heater or furnace.

Aube electronic thermostats use an electronic sensor to read the room temperature. Compared to bimetallic/mechanical thermostats, electronic thermostats react much quicker to temperature changes, thus delivering greater accuracy. Put another way, electronic thermostats dont have nearly the temperature swings found with bimetallic/mechanical thermostats; bimetallic/mechanical thermostats can vary 2C to 3C (up to 5F) from the thermostat setting.

Why should I use an electronic thermostat?
Compared to conventional mechanical thermostats, Aube electronic thermostats are more precise because they respond much more quickly to temperature changes. This precision results in increased comfort and energy savings since temperature swings are all but eliminated.

How does an electronic thermostat save money over a conventional mechanical thermostat?
Electronic thermostats save money because of their greater accuracy. These thermostats keep the temperature within 0.15C (0.27F) or 0.5C (0.9F) of the setting, ensuring minimal temperature swings. This means there is no wasted energy from continually adjusting the thermostat's setting to offset uncomfortable temperature dips.

How much can I save by using an electronic thermostat?
While exact savings depend on factors such as electricity rates and the climate you live in, an electronic thermostat's precision means its cost can usually be recuperated in one to two years.

How can programming save so much money?
Programmable thermostats save money because you do not heat your home when heating isn't required, i.e., overnight or during the day while at work. By lowering the heat while at work during the day, you can realize significant savings: each 1C (1.8F) the temperature is lowered during an eight-hour period equals a savings of 2%.

Programming (electric heating)

What's the difference between 5+2 and 7-day programming?
5 + 2 programming enables you to enter separate programs for weekdays and weekends. Seven-day programming lets you enter different programs for each day of the week.

When I'm programming my thermostat, why can't I enter the temperature, only the time?
If you have an Aube TH106, TH110, TH115, and TH132 Series thermostat, the temperature settings used in the programmed schedule are entered as follows:

  • select desired comfort temperature
  • press the comfort button (sun) for approximately three seconds to save desired temperature
  • select desired economy temperature
  • press the economy button (moon) for approximately three seconds to save desired temperature

The comfort temperature you set will be used in programs 1 and 3. The economy temperature you set will be used in programs 2 and 4.

How does Aube's Early Start feature work?
This feature analyzes past heating cycles to determine when heating should start to ensure the programmed temperature is reached at the programmed time. For example, if you program your thermostat for 21C (70F) at 7 a.m., the thermostat might signal your heating system to start at 6:30 a.m. to ensure the temperature is at 21C (70F) by 7 a.m.

What is the advantage of a pre-programmed thermostat?
Aube pre-programmed thermostats come factory-set with a typical energy-saving schedule. For many households, there will be no need to personalize (re-program) these factory settings since they are already appropriate for a typical household's schedule. This means the thermostat is ready to start saving money as soon as it is installed.

What is cottage programming?
This programming, available on Aube’s TH104 Series, enables the user to enter two settings:

  1. First setting: An approximate arrival time (e.g., Friday at 4:30 p.m.) at which the thermostat heats to comfort level.
  2. Second setting: Commands a temperature decrease in case you do not show up at your cottage/vacation residence that weekend. E.g., this second setting could be for Friday at 7:30 p.m. This way, the thermostat only heats for a short time if you do not show up at your cottage/vacation home on a particular weekend.

On the other hand, upon arrival at your cottage you can simply place your thermostat in AUTO mode and it will follow the normal programming for Saturday and Sunday. Upon leaving, you place the thermostat back in ECONO mode.

Is programming lost during a power outage?
No. Aube thermostats feature battery-free programming backup. For non-programmable models, the thermostat's last setting is saved in a battery-free memory.

Why does my display suddenly disappear or "LP" appears on-screen?
This is likely because the baseboard's thermal protection has cut the current.

All electric heaters have built-in thermal protection cutoffs to prevent heating elements from becoming dangerously hot. If you have an undersized baseboard (i.e., not enough wattage to handle the size of heating area), on very cold days the heater may be on for extended periods of time, meaning the heating element becomes too hot. In this case, current to the heater is cut until the heater cools to a safe level. This causes the display to show "LP" (TH104 models) or go blank (Aube TH106, TH108 and TH109 models).

A heater could also become too hot, for example, if a sofa is placed too close to a baseboard.

At startup, my thermostat briefly flashes features on its screen that I can't program or use.
At startup (power on), Aube thermostats briefly flash all features, including features not available with non-programmable models.

Installation (oil/gas/electric furnaces and air conditioning)

Which thermostats work with heat pumps?
Our TH144HP Series, TH146-N-DE and TH149 work with heat pump systems.

How long should batteries last?
Batteries should generally last from 2 to 3 years, although this could vary depending on the quality of battery used. A low-battery indicator will appear on-screen warning that batteries must be replaced in 60 days. Note that when the batteries are dead, the thermostat will shut off: there will be no heating or cooling.

A blinking suitcase appears on the screen after I've installed the thermostat. Is this normal?
No. A blinking suitcase means there is an improper connection.

I need to directly control a fan or valve. Which thermostat(s) should I use?
For this type of application, the Aube TH140-28-01 must be used since it can operate on 120 or 240 volts.

I have an installation using only two wires (i.e., heating only). How do I determine wire polarity?
There is no polarity to respect for two-wire installations, that is, heat-only applications. Connections can be made on either terminal.

How do I know if the application is line (120 or 240 V) voltage or low (24 V) voltage?
To determine if the wiring in the wall is line or low voltage, check the wires that were connected to your old thermostat. Thicker gauge wires (around 12 AWG) usually mean line voltage. If your old thermostat was installed in an electrical box, chances are it was a line voltage application. Never install line voltage wires on an Aube low voltage thermostat designed to control a oil, gas, or electric furnace and/or central air conditioning.

Programming (oil/gas/electric furnaces and air conditioning)

How can programming save so much money?
Because you do not heat your home when heating isn't required, i.e., overnight or during the day while at work. By lowering the heat while at work during the day, you can realize significant savings: each 1C (1.8F) the temperature is lowered during an eight-hour period equals a savings of 2%.

What is the advantage of a pre-programmed thermostat?
Aube pre-programmed thermostats come factory-set with a typical energy-saving schedule. For many households, there will be no need to personalize (re-program) these factory settings since they are already appropriate for a typical household's schedule. This means the thermostat is ready to start saving money as soon as it is installed.

Why won't my thermostat change between the economy and comfort temperatures?
Aube's TH135 and non-programmable TH144 models allow you to enter comfort, economy and vacation temperature presets. Changing from one temperature preset to another must be done manually: the thermostat will not automatically change, for example, from the comfort temperature to the economy temperature overnight.

When I'm programming my thermostat, why can't I enter the temperature, only the time?
If you have an Aube TH140, TH141, or TH144 Series thermostat, the temperature settings used in the programmed schedule are entered as follows:

  • select desired comfort temperature
  • press the comfort button (sun) for approximately three seconds to save desired temperature
  • select desired economy temperature
  • press the economy button (moon) for approximately three seconds to save desired temperature

The comfort temperature you set will be used in programs 1 and 3. The economy temperature you set will be used in programs 2 and 4.

Switches

Is there polarity to be respected?
For TI032-3W and TI034-3W models, no polarity needs to be respected during installation. However, for 3-way installations follow the instructions carefully to make sure the common wire is properly connected on the two switches.

Can a TI033 or TI035 be installed using a 2-wire connection?
No. These switches require 3-wire connections using the neutral wire. If there are only two wires in the electrical box you cannot install these switches.

Are settings saved during a power outage?
Yes. A built-in battery saves the time and programming.

Can compact fluorescent bulbs (CFLs) be used with Aube switches?
Aube's TI032-3W and TI034-3W have a 40 W minimum loadthe total load when using low-watt bulbs must be at least 40 W. For loads under 40 W, use Aube's TI033 or TI035.

Where can I install programmable switches?
Generally speaking, Aube programmable switches can be installed wherever a conventional switch is used.

Can I control small pumps or motors with these switches?
The TI033 and TI035 can control pumps or motors up to 1 HP.

Can I override the programming?
Yes. Simply press the button to use the switch as a conventional on/off switch.

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