Honeywell Thermostat TL8230A User Manual

TL8230A  
User Guide  
Programmable Thermostat  
1.  
4.  
Description  
Power-up  
n
q
Honeywell’s TL8230A programmable thermostat can be connected to an  
electric heater to control the room temperature.  
Upon power-up, the thermostat is in manual mode ( ) and displays the  
actual temperature.  
n Press the Hour and Min buttons to set the time.  
o Press the Day button to set the day.  
On/Off switch *  
Time and day display  
Appearswhen  
the setpoint is  
displayed  
Temperature display  
Mode display  
5.  
Error Messages  
LO: The measured temperature is below 32°F (0°C).  
r
Day and time  
settings  
Preset temperature  
icon  
Heating is activated.  
Heating power **  
Program button  
Period display  
HI: The measured temperature is above 122°F (50°C).  
Temperature  
preset buttons  
Program  
clear button  
6.  
Backlight  
s
Temperature  
adjustment  
buttons  
Mode selection /  
program exit  
When the backlight button is pressed, the display illuminates for 5 seconds.  
Backlight button  
When either of the  
onds.  
buttons is pressed, the display illuminates for 10 sec-  
*
Set the switch to Off to cut power to the heater. This will not affect the time and tem-  
perature settings.  
7.  
**  
The thermostat displays the heater duty cycle required to maintain the desired tem-  
Temperature Setting  
Setpoint  
The thermostat generally displays the actual temperature. To view the  
setpoint, press one of the buttons once or press the backlight button. The  
perature. For example,  
time.  
appears when the heater is activated 40 percent of the  
t
Display  
% of duty cycle  
1 to 24% 25 to 49% 50 to 74% 75 to 99%  
100%  
setpoint will appear for the next 5 seconds.  
2.  
To change the setpoint, press one of the  
ature is displayed. To scroll faster, hold the button.  
buttons until the desired temper-  
Assembly/Disassembly  
To remove the control module from the power  
base, loosen the captive screw underneath the  
thermostat and pull the two components apart  
as shown.  
o
Preset buttons  
The thermostat has 3 temperature preset buttons:  
Comfort preset button  
Economy preset button  
Vacation preset button  
To install the control module onto the power  
base, reverse the above procedure.  
To use a preset temperature, press the appropriate button. The corresponding  
icon or will be displayed.  
NOTE: Always keep the thermostat's vents clean and  
unobstructed.  
,
The following table shows the intended use and the default setting of each of  
the preset buttons.  
3.  
Configuration  
Some thermostat configurations can be  
modified via the switches on the back of the  
control module.  
p
Icon  
Intended use  
Default setting  
New  
Comfort  
70°F (21°C)  
(when at home)  
Economy  
62°F (16.5°C)  
50°F (10°C)  
(when asleep or away from home)  
Default (factory) settings are inside the gray cells.  
Vacation  
(during prolonged absence)  
#
Functionality  
UP  
DN  
To store a preset temperature:  
a
SW1  
SW2  
SW3  
°F  
°C  
Temperature format  
n Set the desired temperature using the  
buttons.  
b
Disable  
12-hour  
Enable  
Early Start  
Time format  
24-hour  
o Press and hold the appropriate preset button until the corresponding  
icon is displayed.  
a. If you change the temperature display format, the preset buttons (  
will return to their default settings.  
b. Early Start functions in Automatic mode only. When this function is enabled, the  
,
and  
)
p Press Mode/Ret to exit.  
thermostat calculates the optimal time to start heating in order to obtain the desired  
temperature by the set time. The thermostat re-assesses the start time daily based  
on the previous day’s performance.  
TL8230A  
69-1803  
3/5/05  
1/2  
 

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