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User Manual Series F-BO-AFE70
8.1.2
Installation of the Automatic Purging Unit F-BO-AFE70
Remove the two M3 screws from the cover and lift the cover of the Purging unit.
Position the Purging unit at a suitable place on the wall, so that later it can be easily connected to
the pipe system, the aspirating smoke detector and the compressed air. While doing so, note the
permissible mounting positions of the Purging unit and the mounting examples shown above in
Fig. 6.
Fig. 7:
Schematic illustration of the mounting holes and of the location of the connections for the
sampling pipes and for the compressed air on the Automatic Purging Unit F-BO-AFE70
Mark the three mounting points of the bottom plate of the Purging unit, as shown above in Fig. 7,
on the wall and drill the mounting holes with a diameter of 6mm. Insert the plugs into the holes and
use the mounting screws to screw the bottom plate with the assembled valve block to the wall.
Since the installation of an aspirating smoke detector (laying the piping, making the electrical
connections, etc.) can extend over a longer period, it is recommended that the cover be reinstalled
immediately after completion of the work on the Purging unit, and that the free openings of the
25mm push-in fittings as well as of the compressed-air connection be kept closed until the pipe
network is connected, in order to protect the Purging unit.
8.2
Connection to the sampling pipe and to the aspirating smoke detector
For safety reasons and in order to allow easy connection, the Automatic Purging Units
F-BO-AFE70 are delivered with two 25mm push-in fittings which have to be installed as described
in Chapter 5.1.
Using other fittings or other components instead of the supplied 25mm push-in fittings can
lead to severe injuries or damage and therefore has to be refrained from!
The connection between the Purging unit and the sampling pipe must be airtight and pressure-res-
istant, the connection between the Purging unit and the aspirating smoke detector must be airtight,
but it does not have to be pressure-resistant. Therefore make sure you choose the suitable material.
You must never use any glue for the connections of the sampling pipes on the Purging unit and
on the aspirating smoke detector.
In order to make the connections on the Purging unit, please note the instructions in this chapter;
to make the connections on the aspirating smoke detector, please note the instructions of the man-
ufacturer of the ASD.
The 25mm push-in fittings are designed to allow insertion of pipes with an outside diameter of
25mm and to let claws hinder the pipes from gliding out. The pipe is hermetically enclosed by a
gasket.
For this purpose, the pipe that is to be inserted must be cut at a right angle and the cut surface must
be perfectly deburred on the inside and on the outside. Furthermore, the outer surface has to be
provided with a 30° chamfered edge, so as not to damage the gasket when inserting the pipe.
It is recommended that the pipes from the Purging unit to the sampling pipe as well as to the aspir-
ating smoke detector should be constructed in such a way that, even after completed installation,
the pipes can still be pulled out from the 25mm push-in fittings by approximately 45mm in order to
make commissioning and maintenance easier.
I56-4252-010
D200-104-00
Chapter 8 • Mounting and connection of pneumatic components
25
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