Comelit ILS-2, Руководство пользователя

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3.1.6 USB Connector
The detector is equipped with a USB type B connector to allow connection to a PC via a US cable (not supplied).
This communication port allows configuration of the sensor, and downloading of logged data using the VSC
software.
The connector is protected by a screw-fit cover and this must be re-fastened after every use, to prevent dust and
dirt from settling on it.
4 Installing the piping
Several standard configurations of the pipe network are illustrated below.
T The sizing software ASPIRE2 must be used to calculate the channelling time, dilution effects etc. for all the
pipe networks required for individual applications.
Use 25 mm red ABS piping with sampling holes drilled along its length. The piping will terminate with an end
cap, with a hole drilled in its centre. The position of each sampling hole should adhere to guidelines for point
smoke detectors. It is important to note that the concentration of smoke entering a single hole will be diluted
by clean air from other sampling holes and from the end cap hole.
4.1 Piping specifications
In accordance with EN54-20 standards, the pipes must be red ABS and conform to EN 50086-1
(Crushing 1, Impact 1, Temperature 31) with a nominal external diameter of 25 mm. The pipes are
normally supplied in 3-metre lengths and cut as required, but linked using solvent welded sockets or
connected with socket unions (inspectable).
IMPORTANT note: the ILS-2 pipe inlets are tapered so as to allow “push-fit” coupling of the piping coming
from the site. The end of the inlet pipe must be cut cleanly so as to allow airtight
coupling with the tapered inlet. The inlet piping junction with the tapered collector
MUST NOT BE GLUED: doing so will invalidate the sensor warranty.
4.2 Fixing
The standard fixing method for piping requires special clips or clamps. The fixing spacing (distance between two
adjacent clips) is typically 1.5 m.
4.3 Bends
Figure 4-1: 45° bend and 90° bend
The available bends are 90° and 45°. It is important to use 90° swept bends and not “sharp” ones, as sharp
bends introduce high pressure losses and increase the channelling time for the sampling holes downstream of
the bend.