Overview Of Detector Base Sounder; Mounting The Bases - Bosch FCP‑320 Series User Manual

10 en | Installation
MSC 420
The MSC 420 Additional Base was designed specially for surface
mounted cable feed via cable protection conduits. It is used in
combination with any of the above listed bases. It has two
opposing pre-cut inlets of 20 mm diameter and two additional
opposing and prepared inlets for up to 28 mm diameter.
The additional base has a diameter of 120 mm and a height of
36.7 mm.
To protect against condensed water penetration, a seal made of
TPE is situated on the base of the MSC 420.
4.2

Overview of Detector Base Sounder

Detector base sounders are used if the acoustic signaling of an alarm is required directly at
the location of the fire.
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The integrated tone generator has 11 tones for selection (incl.
tones according to DIN 33404 and EN 457) with sound
pressure of max. 100 dBA, depending on the type of tone
selected.
The tone type on conventional variants is set via four DIP
switches and the volume adjusted continuously via a
potentiometer.
Surface mounted and flush mounted cable feed are possible.
4.3

Mounting the Bases

The detector bases are screwed to the even, dry surface using two screws approx. 55 mm
apart.
In the case of cable feed for surface mounting, break out the prepared entry points (X) on the
housing.
In the case of flush mounted cable feed, route the cable through the opening in the centre of
the base.
The short mounting bores marked in the sketch with "Y" may be used only for fixing over a
back box.
Notice!
i
Cable feed and outfeed can be on the same side.
For cable feed at the FAA-420-SEAL and MSC 420 puncture the sealing with a pointed tool.
Do not cut the sealing with a knife.
2021.03 | 11 | F.01U.004.377
MSS 300 Base sounder white, for conventional
technology, connection via the detector C point.
MSS 300 WH-EC Base Sounder, white for conventional
technology, with external activation.
User manual
Conventional Automatic Fire Detectors
Bosch Sicherheitssysteme GmbH