Note 5 Not because of the not very simple documentation comprendre.Je have first mount table, emtteur with batteries and receiver feeds 220 and A Metrix in hommetre to simulate the boiler and make trials fonctionnement.Lorsque you increase or decrease the temperature on the transmitter you see the needle on the rocker Metrix, there are closure conctact receiver, red LED lights and vice versa.Bien test maneuver until compreension operation and install the boiler installation réel.Depuis no loss of radio contact at about 8m.Simuler operating days because not very explicit.