1 series 10C 20C 30C Standard model (Normal operation) Set dew point Accumulated running hours display Helps maintenance control of the dryer. Gives notice of the maintenance timing etc. 1. Energy saving operation (ECO LED is ON green): Dew point can be set manually between 10 to 30C. 2. Normal operation (ECO LED is OFF): Dew point is fixed to 10C. Description No.