Honeywell TH105PLUS Owners Manual
TH105PLUS
Programmable Thermostat
Owner’s
Guide
Table of contents
Overview
About your new thermostat ................................................................... 1
Controls .................................................................................................2
Display................................................................................................... 3
Installation
Installation guidelines ............................................................................ 4
Wiring ....................................................................................................5
Thermostat mounting ............................................................................ 6
Clock and day setting ............................................................................ 7
Operation
Automatic (Auto) mode.......................................................................... 8
Manual (Man) mode ............................................................................10
Away mode.......................................................................................... 10
Standby mode .....................................................................................10
Appendices
Advanced settings ............................................................................... 11
In case of difficulty............................................................................... 14
Resetting the thermostat (default settings).......................................... 15
Power outage ......................................................................................16
Specifications ...................................................................................... 16
3-year limited warranty ........................................................................17
Customer Assistance ..........................................................................18
TH105PLUS
About your new thermostat
This thermostat is designed to control an electric heating system such as a
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 14.6 A
• a system driven by a contactor or a relay (inductive load)
• a central heating system
SUPPLIED PARTS
• One (1) thermostat
• Two (2) 6-32 mounting screws
• Two (2) solderless connectors
Do you need assistance?
We are here to help.
Call 1-800-831-2823.
1
Owner’s Guide
Mode button
(see pages 8 & 10)
Day button
Hour button
Program button
Minute button
Up and Down buttons
Return button
Backlit screen *
* The screen is backlit for 12 seconds when you press any button.
Controls
2
Display
Room temperature
Heating intensity indicator
Time and day
Mode indicator
(see pages 8 & 10)
Appears when power to
the thermostat is cut off
(see page 7)
Setpoint
temperature *
Appears if the
thermostat is configured
for a fan-forced heater
(see page 11)
Period indicator
(see page 8)
Indicates that the settings
are locked (see page 11)
* To display the set temperature (setpoint), press the Up or Down
button once. The thermostat will display the setpoint instead of the
clock for 5 seconds.
TH105PLUS
3
Owner’s Guide
Installation guidelines
TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN
POWER PANEL TO AVOID ELECTRICAL SHOCK.
• All cables and connections must comply with local electrical
codes.
• This thermostat has tinned copper wires for line and load connections. Special CO/ALR solderless connectors must be used if
these wires will be connected to aluminium conductors.
• Install the thermostat onto an electrical box.
• Install the thermostat about 1.5 m (5’) high, on an inside wall facing
the heater.
• Avoid locations where there are air drafts (such as the top of a
staircase or an air outlet), dead air spots (such as behind a door),
or direct sunlight.
• Do not install the thermostat on a wall that conceals chimney or
stove pipes.
• The thermostat wires are not polarized; either wire can be connected to the load or to the power supply.
4
TH105PLUS
2-wire Installation
4-wire Installation
Wiring
Connect the thermostat wires to the power and to the load using
solderless connectors for copper wires.
5
Owner’s Guide
Thermostat mounting
Push the excess wires back inside the
electrical box.
Secure the thermostat to the electrical
box using the provided screws.
Insert the screws through either the
right or left pair of mounting holes on
the thermostat.
NOTE: If there is a protective film or
sticker on the thermostat’s screen, peel it
off.
Apply power to the heating system. Verify the installation by
checking that the heater can be turned on by raising the setpoint
using the Up button and off by lowering the setpoint using the
Down button.
WARNING: Keep the thermostat's air vents clean and free from
obstructions.
6
Clock and day setting
The clock must be set
when the time is incorrect
or flashes on the screen.
Press the Day button
to set the day.
Use the Hour and Min
buttons to set the
clock.
Press the button to
exit.
TH105PLUS
7
Owner’s Guide
Automatic mode
In Automatic mode, the thermostat adjusts its temperature setpoint according to the period of the day. To place the thermostat in
this mode, press the Mode button until Auto appears on the
screen. The current period name also appears (unless the thermostat has not been programmed with a schedule).
You can program up to 4 periods (Wake, Leave, Return or Sleep)
in a day. You can set 2 different programs: one for the weekdays
(Monday to Friday) and another one for the weekend (Saturday
and Sunday).
The thermostat uses the following default schedule:
Monday to Friday Saturday & Sunday
Period Start Time Temperature Start Time Temperature
Wake 6:00 21.0°C (70°F) 6:00 21.0°C (70°F)
Leave 8:00 16.5°C (62°F) --:-- - Return 18:00 21.0°C (70°F) --:-- - Sleep 22:00 16.5°C (62°F) 22:00 16.5°C (62°F)
Temporary Override
You can temporarily modify the setpoint temperature while the thermostat is in
Automatic mode using the Up or Down button. The new setpoint will be used until
the beginning of the next period. During the override, Auto flashes on the screen.
You can cancel the override by pressing the button.
8
Automatic mode (cont’d)
To modify the schedule:
Press the Pgm button. Each time you press
the Pgm button, the thermostat displays
one of the periods of the schedule in the
following order:
Weekdays
(MO TU WE TH FR)
12341234
Press the Hour and Min buttons to set the
start time of the displayed period.
NOTE: To cancel the period, press the
Mode button. Instead of displaying the start
time of the period, the thermostat will display --:--. During operation, the thermostat
will skip over that period.
Press the Up or Down button to set the
temperature.
To set another period, press the Pgm
button and repeat steps 2 and 3.
Press the button to return to normal
display.
Weekend
(SA SU)
9
TH105PLUS
Owner’s Guide
Manual (Man) mode
To place the thermostat in Manual mode, press the Mode
button until Man appears on the screen. In this mode, any
modification to the temperature setpoint must be done
manually. To set the temperature, press the Up or Down
button. The default setting is 21.0°C (70°F).
Away mode
To place the thermostat in Away mode, press the Mode button
until Away appears on the screen. This mode is a quick way to
lower the temperature to a predetermined setting before you go
away for an extended length of time. The temperature is 15.0°C
(59°F) by default and can be modified using the setup menu
(see page 11).
Standby mode
To disable heating, press the Mode button until Standby
appears on the screen. In this mode, the setpoint temperature
cannot be displayed or modified. For frost protection, heating
will turn on only to prevent the room temperature from dropping
below 5°C (41°F).
10
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