54. Change the day with the key ▲ and press the ENTER key to return to the main page ofthe programming menu.5. Press ENTER again to exit the programming menu. The chronothermostat returns tothe mode of operation briefly interrupted.Summer / Winter SelectionTo change from Winter (heating system) tosummer (cooling system) operation and viceversa, hold the Summer/ Winter key down forat least 4 seconds. The mode of operationselected is indicated on the display by theWinter or Summer icon.Winter Summer