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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