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           USB PROGRAMMER

Installation: 

Insert the bundled Mini CD into your computer to begin the installation.  On computers running 

the Windows operating system, a welcome window will appear with an option to begin the installation process. 
If your system is set to disallow CD auto-run you will not see the welcome window and you must launch the 
installer manually by browsing the CD contents in “My Computer”.  If your system is not physically compatible 
with the bundled mini cd you may download the program for the operating system of your choice from the
following website:

Be sure to have the LX USB Programmer application installed on your computer before proceeding.  Follow the installation
instructions below if you have not already installed the program.

QUICK START GUIDE

(Cont.)

http://www.source1thermostats.com/downloadapp.html

S1-LXPROG

1. Launch the installed program:

2. Connect the USB Programmer to one 
of your computer’s USB ports using the 
included USB cable as shown here:

The program should automatically recognize
your connected programmer and list it under the
“Programmers" tab.  

USB

Cable

                         The two supplied AA batteries must be
installed in the USB Programmer for proper operation.  

Important:

3. Program thermostat settings:

Click on the “Settings” tab to setup and send Thermostat settings to the USB Programmer.
(Follow instructions in the LX USB Programmer application for programming help.) 

• For Mac computers, download and run 

lxusb_osx_setup.pkg

• 

For Windows computers, download and run 

lxusb_win_setup.exe

4. Uploading settings and text to the thermostat:

Connect the USB Programmer to the Thermostat Accessory 
Port using the Thermostat Accessory Cable as shown:

After the USB Programmer has been safely ejected, disconnect from the USB cable and follow the instructions 
below.  

The LED will turn red during operation and flash green briefly 

when finished.

The LED will flash red a number of times based on the model 

of the thermostat it recognizes.

 

Reconnect if the red/green LED does not light or flash at all.

OVERRIDE

Thermostat

Accessory

Cable

LED

Thermostat

Accessory

Port

1 Flash     = S1-TBSU22HN
2 Flashes = S1-TBSU32P7
3 Flashes = S1-TBSU32HP7
4 Flashes = S1-THSU21P1
5 Flashes = S1-THSU32P7
6 Flashes = S1-THSU32HP7

 

(A)

NOTE: When the programmer is first 
connected, a drive window will pop up 
on your computer screen.  You may close
this drive window when it appears.

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