Honeywell TL8100 Owner's Manual
USER GUIDE
69-2018EFS-01
TL8100
7 DAY PROGRAMMABLE HYDRONIC THERMOSTAT
1. DESCRIPTION
This thermostat can be used to control the following heating
systems:
• gas, oil or electric systems
• hot water heating
• hot air system with no fan control
• millivolt system (e.g., gas fireplace)
• electric heating up to 1200 W @ 240 V max.
2. TEMPERATURE DISPLAY
AND SETTING
Setpoint Temperature
The thermostat normally
displays the measured
ambient temperature. To view
the setpoint temperature,
briefly press either of the
buttons. The setpoint
temperature will appear for 5
seconds.
To adjust the setpoint, press one of the
buttons until the
desired temperature is displayed.
Preset Temperatures
The thermostat has 3 preset temperatures:
To use a preset temperature:
Press the corresponding button (
, or
). The
temperature and the corresponding icon will be displayed.
To change a preset temperature:
1. Set the desired temperature using the
buttons.
2. Press and hold the corresponding button (
, or
)
until the icon is displayed on the screen (approximately
3 seconds).
Programming
buttons
Temperature
preset buttons
Temperature
adjustment
buttons
Time and day
Temperature
Mode and preset
temperature
indicators
Heating
indicator
Low-battery
indicator
Appears during the
setpoint display
Preset temperature
Default value
Comfort temperature
68°F (20°C)
Economy temperature
64°F (18°C)
Vacation temperature
50°F (10°C)
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