I need help with how to turn on my new digital thermostat?

I have a Hunter brand model 42995B digital electronic thermostat for heating and cooling system. The maintance man that came into my home to install it didn't leave any instructions on how to turn on the heat and or the air conditioner (a/c). The print is too small on the directions for me to see, can anyone help?I need help with how to turn on my new digital thermostat?I would say give the guy a call. I could not find that model with an online search. But I'm sure the installer should be able to answer you very easily.