Thermo DC 200 Control elements21Recalling/erasing preset timesRepeatedly press the button until the desired memory location isdisplayed.To erase the preset time, press the button several times until thetime of the day is displayed instead of the memory location.Programming duration of operating timeThe heater must be switched off. Press the button for 3 seconds -operating time is flashing - and set the desired operating time (10 to 120minutes) using the and buttons.Setting the remaining operating timeSet the desired remaining operating time (1 to 120 minutes) using theand buttons. The remaining operating time refers to the time theheater still continues to remain in operation. It can only be changedwhile the heater is in operation and the ignition switched off.Setting the wake-up timeA wake-up time can only be programmed on the standard digital timer.The wake-up time is not bound to a specific day of the week. Repeatedlypress the button until the bell symbol appears on the display.Set the desired wake-up time using the and buttons. The alarmclock turns off after 5 minutes or when one of the buttons is pressed.Recalling/erasing the wake-up timeRepeatedly press the button until the bell symbol appears onthe display - read off wake-up time. To erase the wake-up time: pressthe button until the bell symbol is no longer visible on thedisplay.Remote controlPossible by means of an optional external "instant heating" buttonVehicles with ADR equipmentOn ADR vehicles it is not possible to program a preset starting time. Theremaining time is shown on the display while the heater is in operation.The clock can be set. The alarm clock function can be programmed onthe standard digital timer.8.3. Activation via mains powerIf you bridge the contacts of the control line, the heating system is acti-vated when mains power is applied.8.4. Operation indicatorFor monitoring there should be an operation indicator provided at thevehicle, which displays the status of the switching signal/heatingsystem.If the operation indicator is integrated into the power circuit for externalcontrol, it may require a current of max. 250mA. Only suitable lamps forthe voltage range of 18 - 30V are to be used (ref. also para. 8.1, Fig. 11and 12).