Honeywell 08161 Leaflet

08161 / TH110-DP-P / TL8230

      69-2023-01                    2010-02-05                    1/2

Programmable Thermostat - Installation and User Guide

This programmable thermostat can be connected to an electric heating sys-
tem such as an electric baseboard, a radiant ceiling, a floor heating system,
an electric convector, etc. It is not compatible with a central heating system.

Set the switch to Off to cut power to the heater. This will not affect the time and tem-
perature settings.

TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN POWER
PANEL TO AVOID ELECTRICAL SHOCK.
•

The installation must be carried out by an electrician.

•

All cables and connections must conform to the local electrical code. 

•

Special CO/ALR solderless connectors must be used when connecting
with aluminum conductors.

•

Install the thermostat onto an electrical box.

•

Install the thermostat about 5 feet 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 sun-
light. 

•

Do not install the thermostat on a wall that conceals chimney or stove
pipes.

n

Connect the thermostat wires to the 
power and to the load using solderless 
connectors for copper wires.

o

Push the excess wire back into the 
electrical box to prevent interference 
with the thermostat. 

p

Secure the thermostat using two 6-32 
screws. 

q

Return power to heating system.

The configuration switches are on the back of the thermostat. Default (factory)
settings are inside the gray cells.

Upon power-up, the thermostat is in manual mode ( ) and displays the room
temperature.

n

Press the Hour and Min buttons to set the thermostat’s clock.

o

Press the Day button to set the day.

The thermostat normally displays the room temperature. To view the set tem-
perature, press the   or   button briefly. The set temperature will appear for
5 seconds.
To change the setpoint, press the   or   button until the desired temperature
is displayed.  To scroll faster, hold the button.

The thermostat has 3 preset temperatures:

Comfort temperature 

Economy temperature 

Vacation temperature 

•

To use the Comfort or Economy temperature, press the 

 or   button

respectively. The corresponding icon  will be displayed.

•

To use the Vacation temperature, press both 

 and   buttons simulta-

neously. The   icon will be displayed.

To store the Comfort or Economy temperature:

Set the desired temperature using the   or   button. Press and hold 
the appropriate button (

 or  ) for approximately 3 seconds until the 

corresponding icon is displayed.

To store the Vacation temperature:

Set the desired temperature using the   or   button. Press and hold 
both 

 and   buttons simultaneously for approximately 3 seconds until 

the   icon is displayed.

n

1.

o

2.

To select the 
operating mode

To set the day

To set the time

Time and day

Temperature

Operating 
mode icons

On/Off 
switch

To skip a period

To program the schedule

Preset temperature 
icons

Temperature 
adjustment

Temperature 
preset buttons

Heating 
indicator

Periods

Appears during the 
setpoint display

Power

Load

Load

Black

Red

p

3.

SW1

Not used

SW2

Early Start

a

a. Early Start can be used in Automatic mode only. When this function is 

enabled, the 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 perfor-
mance.

Disable

Enable

SW3

Time format

12-hour

24-hour

SW4

Temperature format

b

b. If you change the temperature display format, the preset temperatures 

(

,   and  ) will return to their default settings.

°F

°C

q

4.

r

5.

Comfort (when at home)

70 °F (21 °C)

Economy (when asleep or away from home)

62 °F (16 °C)

Vacation (during prolonged absence) 

50 °F (10 °C)

400-110-007-B_69-2023-01 (TH110-DP-P Cadet TL8230) ENG.fm  Page 1  Friday, February 5, 2010  2:10 PM