– 26 –1. Loosen the smoke detector from the base of the housing by turning itanticlockwise. Mark the drill holes through the base.2. Drill the holes, put in the plugs and screw in the base.3. Insert the battery (see the diagram ) and fasten the smoke detector by twistingit clockwise onto the base. The detector has a safety device that preventsinstallation without a battery.4. If you cannot fasten the smoke detector to the base:Check whether the battery is correctly inserted and connected.Operation and function (test)• The smoke detector is ready for use as soon as you put in the battery.• Under the housing cover there is an indicator lamp which flashes every32 seconds to show that the battery is correctly inserted and is delivering enoughpower to generate an alarm.• Check the function of the smoke detector at regular intervals. Press the lowersection of the housing cover for 5 seconds. If you hear a signal, the device isworking properly and can be fastened.• Alternatively, you can use the RM test spray available from ABUS to test the smokedetector. If the RM test spray enters the detection chamber, an alarm shouldsound, so that you can test whether the detector is working properly.Replacing the battery• If the battery is low, the smoke detector beeps once every minute (for up to30 days) to remind you to replace the battery.• You must change this battery when you hear this signal.• Even so, the smoke detector remains functional in this condition.• You must test the smoke detector each time you change the battery.• Carry out the test as detailed above.Putting into operation