Honeywell TH404 Owners Manual
Owner’s Guide
TH404
Programmable Thermostat
Table of contents
Overview |
|
About your new thermostat .............. |
1 |
Quick reference to controls .............. |
2 |
Quick reference to screen display .... |
3 |
Installation |
|
Removing the faceplate.................... |
4 |
Wiring ............................................... |
5 |
Installing the thermostat ................... |
6 |
Quick start-up / Setting the clock...... |
7 |
Operating modes |
|
Automatic (Auto) mode..................... |
8 |
Manual (Man) mode ......................... |
9 |
Away mode..................................... |
10 |
Countdown mode ............................ |
11 |
Configuration |
|
Default schedule............................. |
12 |
Modifying the schedule................... |
13 |
Setup menu .................................... |
14 |
Setup procedure ............................. |
16 |
Appendices |
|
In case of difficulty .......................... |
17 |
Specifications.................................. |
18 |
3-year limited warranty ................... |
19 |
Customer assistance ...................... |
20 |
TH404
About your new thermostat
This thermostat has been 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 10.4 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
1
Owner’s Guide
Quick reference to controls
•To turn the screen backlight on, press the Select button once. The backlight will remain on for 12 seconds.
•To display the setpoint temperature, press the Up or
Down button once. The setpoint will be displayed for 5 seconds.
•To modify the setpoint temperature, press the Up or
Down button until the desired value is displayed.
•To enter or exit the programming mode, press the Select button and hold for 3 seconds.
Help tab
Slide up at the right and remove to view information on both sides.
Screen
Up button
Down button
Select button
2
TH404
Quick reference to screen display
Countdown mode (see page 11)
Flashes during
Countdown mode 
Time
Day
Automatic mode (see page 8) Manual mode (see page 9) 
Away mode (see page 10)
Heating intensity indicator (No icon appears when heating is off.)
Setpoint temperature (see page 2)
Ambient temperature
Periods (see page 12)
3
Owner’s Guide
Removing the faceplate
TURN OFF POWER OF THE HEATING SYSTEM AT THE MAIN ELECTRICAL PANEL TO AVOID ELECTRIC SHOCK.
WARNING: Installation must be carried out by a certified electrician and must comply with national and local electrical codes.
Loosen the screw holding the faceplate to the base. The screw cannot be completely removed and remains captive on the base. Remove the faceplate from the base by pulling the bottom section.
4
|
|
|
|
|
|
|
TH404 |
Wiring |
|
|
|
|
|
|
|
Connect |
either |
one |
of |
the |
2-wire installation |
4-wire installation |
|
thermostat |
wires |
to |
the |
|
|
||
heater wire |
and the other |
|
Power supply |
||||
one to the power supply |
|
||||||
|
|
||||||
wire |
using |
solderless |
|
|
|||
connectors for copper wires. |
|
|
|||||
NOTE: Special CO/ALR solderless connectors must be used when connecting with aluminium conductors.
Power supply
5
Owner’s Guide
Installing the thermostat
1)Install the base onto an electrical box.
2)Place the FAN switch as follows:
Place at Yes if you have a fan-forced heater (to prevent premature burnout of the motor).
Leave at No for better temperature regulation if you do not have a fan-forced heater.
3)Reinstall the faceplate on the base and secure it in place with the screw.
4)Apply power to the thermostat at the main electrical panel.
Keep air vents at top and bottom of thermostat clean and unobstructed at all times.
FAN switch
If you change the FAN switch position after you have already applied power to the thermostat, disconnect power to the thermostat at the electrical panel for 3 seconds. The thermostat will use the new setting when you reapply power.
6
TH404
Quick Start-up / Setting the clock and date
When you power the thermostat, the Time menu flashes on the screen. Set the thermostat’s clock and date as follows:
Time Menu |
Select the format |
Set the hour |
Set the minutes |
Set the year |
Set the month |
Set the date |
Normal display |
NOTE: At any time, you can access the Time menu by pressing the Select button for 3 seconds and then pressing the Down button once.
Your new thermostat is already preprogrammed and is now controlling the temperature!
7
Owner’s Guide
Automatic (Auto) mode
In Automatic mode, the thermostat follows the programmed schedule (see page 12). To place the thermostat in Automatic (Auto) mode:
Normal display |
|
|
|
Auto mode |
|
|
|
|
|
Select Auto
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 used until the end of the current period. Auto will flash during the override. You can cancel the override by pressing the Select button twice to return to Automatic mode.
8
TH404
Manual (Man) mode
Use the Manual mode if you wish to keep the thermostat at the same temperature indefinitely. In this mode, the thermostat will remain at this temperature until you press the Up or Down button to change it.
To place the thermostat in Manual (Man) mode:
Normal display Manual mode
Select Manual Set temperature
9
Owner’s Guide
Away mode
The Away mode can be used when you are away for an undetermined length of time. For frost protection while saving energy, the Away temperature is set by default 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.
NOTE: The Away mode can also be used to prevent tampering of the setpoint temperature in the summer season when heating is not required.
To place the thermostat in Away mode:
Normal display |
|
|
|
Away mode |
|
|
|
|
|
Select Away
10
TH404
Countdown mode
Use the Countdown mode if you wish to keep the same temperature for a predetermined length of time. The choices of countdown times are: 15, 30 or 45 min, or 1, 2, 4, 8, 12 or 18 hr, or 1 to 14 days. At the end of the countdown, the thermostat automatically returns to the previous mode and uses the temperature programmed for that mode. At any time, you can cancel the Countdown mode by pressing the Select button.
To place the thermostat in Countdown mode:
Normal display |
Optional (last settings are used by default) |
Countdown |
|
|
|
mode |
|
Select Countdown |
Set time |
Set temperature |
|
|
To cancel the Countdown mode |
|
|
NOTE:
At any time during the Countdown mode, you can adjust the countdown time and temperature by performing the steps shown inside the dotted rectangle.
11
Owner’s Guide
Default schedule
When placed in Automatic mode (see page 8), the thermostat follows the programmed schedule. By default, the thermostat is programmed with the following schedule:
|
Monday to Friday |
Saturday and Sunday |
|||
|
(Mo, Tu, We, Th & Fr) |
(Sa & Su) |
|
||
|
|
|
|
|
|
Period |
Starting time |
Temperature |
Starting time |
|
Temperature |
Wake |
6:00 (6:00 AM) |
21.0°C (70°F) |
6:00 (6:00 AM) |
|
21.0°C (70°F) |
Leave |
8:00 (8:00 AM) |
16.5°C (62°F) |
-:-- |
|
- |
Return |
18:00 (6:00 PM) |
21.0°C (70°F) |
-:-- |
|
- |
Sleep |
22:00 (10:00 PM) |
16.5°C (62°F) |
22:00 (10:00 PM) |
|
16.5°C (62°F) |
The schedule consists of 4 periods per day, which represents a typical work day. However, you can program the thermostat to skip (cancel) the periods that do not apply to your situation. For example, Leave and Return periods are skipped for the weekend in the default schedule.
You can choose a different program every day; i.e., each period can have a different starting time and a different temperature every day.
12
Loading...