We have now corrected and can expect the next fondue barely; We are ready ... In the smoke detectors, we have deliberately opted for a branded product.
Product features:
The smoke detector operates by the optical principle (opacity) and responds to the turbidity of the air by smoke particles. This procedure is standard with smoke detectors and is recommended by the fire department. Penetrates through cabinet slots smoke-filled air in the test chamber a, an alarm sounds.
The device uses a lithium-ion battery, making it up to 10 years use without changing batteries.
Battery and mounting hardware (two 6-seater multi-purpose dowels and appropriate screws) are included. The operating instructions in sufficient detail and are regarding evidence. Suitable locations in the flat / the house.
My own experiences / impressions:
The device operates relatively large falls by its white color on a white blanket but not unpleasant.
The alarm sound is very loud (85 dB according to techn. Data). We have installed a detector in the bedroom and are afraid now even before he goes off times not because of the fire and smoke, but because of the alarm ;-)
The assembly is clearly one of the negative aspects of the product and has some cost to me nervous: On the ceiling a base plate has to be screwed, then snaps into the detector via a rotary motion.
Three things are simply not thought through in terms of installation:
1. The non-rotationally symmetrical design of the detector necessitates precise work, so that it afterwards is not "wrong" looks. Call me "Monk" but the lettering and the slots should be parallel or perpendicular to the room walls. Wrong can any ... Just as it makes a very difficult but Abus: The mounting plate must be mounted (probably around 22.5 °) rotated. Unfortunately, there is no edge to the plate, you can align a reference point parallel to wall. I've finally solved so: baseplate locked in detectors, both temporarily glued with double-sided tape on the ceiling, so that the detector is level, removed detector, took the now seated at the right angle mounting plate to mark, plate removed, drilled holes, plate Final mounted latched detectors.
2. The two screw holes in the plate are indeed designed as a slot, but leave no angle correction to the plate: one millimeter drilled incorrectly and the detector sits twisted ... (see "Monk").
3. It's really a snap fumbling the detector mounted on the plate. There is no mark on the detector and panel (eg similar to those at bayonet for SLR) and you just have to try as long until you gets set angle. Luckily you have to make this, at best, only once in 10 years ...
The manual is not sufficiently accurate at one point, and should be supplemented with such a safety-critical product: The battery is indeed engaged, but not connected. But this is not easy to detect, because the battery has a pole protective plastic, which looks like a plug! The detector can be attached, but has no function. But exactly how something is to be prevented by a barrier which prevents mounting at least with an empty battery compartment.
The function can be verified over a longer pressure from below to the housing. Here at last would notice if the battery is disconnected.
Conclusion:
The actual function to report smoke over a loud alarm is fulfilled. But that can hopefully all the other GS-tested smoke detectors also ... you can argue about the design, for us it was OK. The installation is awkward. Here I would really expect from a German brand product more maturity. For this two star deduction. The next time I'm looking for a product out that in terms of assembly and optical design is critical.
