Autronica AutroSense Micra 10, Руководство по установке

Страница: 25 / 56

Installation and configuration
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook 17
Installation
Mechanical installation
The docking station is connected to the installed sampling pipework and fixed to
the mounting surface using three screws of a type appropriate to the mounting
surface. Ensure that the sampling and exhaust pipes are securely seated in the
pipe ports before securing. If using a piped exhaust docking station, be sure that
the sampling and exhaust pipes are fitted into the relevant ports as shown in
Figure 4 on page 11.
Removing the front cover
To remove the front cover, unfasten the four attachment screws on the front of
the unit. The cover may then be removed.
Electrical installation
The d etector is supplied with removable terminal blocks (Refer to Figure 3 on
page 6 .) These may be removed from their sockets by lifting them up at right
angles to the circuit board.
Take note of the orientation of each terminal block and its function before
removing it. It may also be beneficial to mark the connection wires with suitable
identification labels or colored rings to aid in the connection process.
Each detector is supplied with a pair of RF suppression ferrite rings. To ensure
compliance with all relevant EMC requirements, the conductors of each cable
should be wound once around a ferrite as shown here before entering the
relevant connector. Power conductors should be on a separate ferrite, but
different forms of signal conductor (e.g. APIC signals and relays) can share the
same ferrite. There should be about 30 mm (1-1/4 in.) of wire between the end of
the ferrite and the terminal block to give adequate stress relief. To achieve this, it
is necessary to strip back the cable screen approximately 130 mm (5 in.). The
screen should be terminated under the cable gland cap (as shown in Figure 8).