Page 2 - Table of contents
Overview About your new thermostat .............. 1Quick reference to controls .............. 2Quick reference to screen display .... 3 Installation Removing the faceplate.................... 4Wiring ............................................... 5Installing the thermostat ................... 6Quic...
Page 3 - The thermostat; CANNOT; About your new thermostat
TH303 1 This thermostat has been designed to control an electric heating system such asa baseboard heater, a radiant ceiling, a convector or a fan-forced heater. The thermostat CANNOT be used with: • a resistive load under 0.83 A• a resistive load over 10.4 A• a system driven by a contactor or a rel...
Page 4 - Quick reference to controls
400-303-000-C 2 • To turn the screen backlight on , press the Select button once. The backlight will remain on for 12seconds. • To display the setpointtemperature , press the Up or Down button once. The setpoint will be displayed for 5 seconds. • To modify the setpointtemperature , press the Up or D...
Page 5 - Quick reference to screen display; Ambient temperature
TH303 3 Quick reference to screen display Ambient temperature Heating intensity indicator (No icon appears when heating is off.) Time Periods (see page 12) Countdown mode (see page 11) Manual mode (see page 9) Day Automatic mode (see page 8) Away mode (see page 10) Setpoint temperature(see page 2) F...
Page 6 - Removing the faceplate
400-303-000-C 4 TURN OFF POWER OF THE HEATINGSYSTEM AT THE MAIN ELECTRICALPANEL TO AVOID ELECTRIC SHOCK. WARNING : Installation must be carried out by a certified electrician and mustcomply with national and local electricalcodes. Loosen the screw holding the faceplate tothe base. The screw cannot b...
Page 7 - NOTE; Wiring
TH303 5 Connect either one of thethermostat wires to theheater wire and the otherone to the power supplywire using solderlessconnectors for copper wires. NOTE : Special CO/ALR solderless connectors mustbe used when connectingwith aluminium conductors. Wiring 2-wire installation 4-wire installation P...
Page 8 - Place the; switch on; Yes; only if; Installing the thermostat; FAN; switch
400-303-000-C 6 • Install the base onto an electricalbox. • Place the FAN switch on Yes only if the thermostat is connected to afan-forced heater. Otherwise leaveat No . • If applicable, peel off the protectivesticker from the thermostat’s screen. • Reinstall the faceplate on the baseand secure it i...
Page 9 - When you power the thermostat, the; Time; menu flashes on the screen. Set the; Quick Start-up / Setting the clock and date; Your new thermostat is already preprogrammed
TH303 7 When you power the thermostat, the Time menu flashes on the screen. Set the thermostat’s clock and date as follows: NOTE : At any time, you can access the Time menu by pressing the Select button for 3 seconds and then pressing the Up button once. Quick Start-up / Setting the clock and date T...
Page 10 - While the thermostat is in Automatic mode, you can press the; Up; or; Down; button to modify; Auto; button twice
400-303-000-C 8 In Automatic mode, the thermostat follows the programmed schedule (see page 12).To place the thermostat in Automatic ( Auto ) mode: Temporary override While the thermostat is in Automatic mode, you can press the Up or Down button to modify the temperature. The new temperature will be...
Page 11 - button to change it.; Man
TH303 9 Use the Manual mode if you wish to keep the thermostat at the sametemperature indefinitely. In this mode, the thermostat will remain at thistemperature until you press the Up or Down button to change it. To place the thermostat in Manual ( Man ) mode: Manual (Man) mode Set temperature Normal...
Page 12 - Away mode
400-303-000-C 10 The Away mode can be used when you are away for an undetermined length oftime. For frost protection while saving energy, the Away temperature is set bydefault at 15°C (59°F) and cannot be modified by simply pressing the Up or Down button. To modify the Away temperature, see page 16....
Page 13 - Select; To place the thermostat in Countdown mode:; Countdown mode
TH303 11 Use the Countdown mode if you wish to keep the same temperature for a predeterminedlength of time. The choices of countdown times are: 15, 30, 45 min, 1, 2, 4, 8, 12, 18 hr and 1to 14 days. At the end of the countdown, the thermostat automatically returns to the previousmode and uses the te...
Page 14 - Leave; and; Return; periods are skipped for the weekend in the default schedule.; Default schedule; Period
400-303-000-C 12 When placed in Automatic mode (see page 8), the thermostat follows the programmedschedule. By default, the thermostat is programmed with the following schedule: The schedule consists of 4 periods per day, which represents a typical work day. However, youcan program the thermostat to...
Page 15 - To skip a period; Modifying the schedule
TH303 13 To modify the schedule, proceed as follows: To skip a period : When the hour or the temperature of the period is flashing, press the Up and Down buttons at the same time. (Alternatively, set its hour between 23:00 [11:00 PM] and 0:00 [12:00 AM] orits temperature below 5°C [41°F].) Its time ...
Page 16 - Configuration parameters; Display
400-303-000-C 14 Configuration parameters Display Parameter Options Default setting To modify Fan 1 Yes / No No FAN switch (see page 6) Time format 12h / 24h 24h Time menu (see page 7) Temperature unit °C / °F °C Configuration menu (see page 16) Away temperature 2 5°C - 30°C (41°F - 86°F) 10°C (50°F...
Page 18 - button for 3 seconds to enter the main menu.; button twice to enter the Configuration (; Conf; Configuration procedure
400-303-000-C 16 The Configuration menu is shown below. n Press the Select button for 3 seconds to enter the main menu. o Press the Up button twice to enter the Configuration ( Conf ) menu. Configuration procedure Configuration Menu Set unit oftemperature Set Away temperature Set DaylightSaving Time...
Page 19 - In case of difficulty; PROBLEM
TH303 17 In case of difficulty PROBLEM SOLUTIONS Thermostat is hot. This is normal. Ensure that the heater capacity does not exceed the thermostat’s maximum load. Displayed temperature is wrong. Remediate if any the following conditions exists:• The thermostat is exposed to air draft. • The thermost...
Page 20 - Customer assistance; To reset the thermostat; press both; the next 5 seconds, when; RST
400-303-000-C 18 If you have any questions about the product, contact us at: 705 MontrichardSaint-Jean-sur-Richelieu, QuebecJ2X 5K8Canada Tel: 1-800-831-AUBE (2823)Email: [email protected] For more information on our products, go to www.aubetech.com Customer assistance To reset the thermost...
Page 21 - Specifications
TH303 19 - Supply : 120/240 VAC, 60 Hz - Minimum load : 0.83 A (resistive only)200 W @ 240 VAC100 W @ 120 VAC - Maximum load : 10.4 A (resistive only)2500 W @ 240 VAC1250 W @ 120 VAC - Setpoint range : 5°C to 30°C (41°F to 85°F) - Display range : 0°C to 70°C (32°F to 99°F) - Setpoint/display resolut...
Page 22 - -year limited warranty
400-303-000-C 20 Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use andservice, for a period of three (3) years from the date of purchase by the consumer. If at any time during the warranty period theproduct is determined to ...
