1. Set temp. to 50°F (10°C).

2. Press long press on SELECT button until display flash and COOL appear. 
With set buttons (+, -) set your temperature that below it you do not want the system to create cool. 
For example: 68°F - so even if someone chooses set temp. 60°F it will cool only until 68°F - very important to save energy. 
Press SELECT button short press and set your HEAT temp. limit. For example 74°F so even if someone set the temp. to be 80°F your heaters will keep your home at 74°F. (set heat must be greater that set cool and your thermostat will take care of it).

3. Press SELECT button (short press) and adjust °F or °C with set buttons (+, -) (the flashing one).

4. Press SELECT again and adjust with set buttons between E or 0 (electric or oil, gas). 
E - If fan was chosen (FAN or AUTO FAN - item 3) then fan works continuously. 
0 - If auto fan was chosen fan will not work at all (oil system).

5. Press SELECT again and choose with set buttons between 3 or 0.
3 = 3 minutes time delay to protect compressor. 
0 = No time delay for system's test only.
After testing the system 3 must be chosen again!
(After break of electricity 3 will return automatically)

6. Press SELECT to return to normal display.